CA1064864A - Open spiral molded parts separator - Google Patents
Open spiral molded parts separatorInfo
- Publication number
- CA1064864A CA1064864A CA256,116A CA256116A CA1064864A CA 1064864 A CA1064864 A CA 1064864A CA 256116 A CA256116 A CA 256116A CA 1064864 A CA1064864 A CA 1064864A
- Authority
- CA
- Canada
- Prior art keywords
- spiral
- objects
- rotatable
- coil
- parts
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B13/00—Grading or sorting solid materials by dry methods, not otherwise provided for; Sorting articles otherwise than by indirectly controlled devices
- B07B13/006—Sorting molded pieces and runners
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B13/00—Grading or sorting solid materials by dry methods, not otherwise provided for; Sorting articles otherwise than by indirectly controlled devices
- B07B13/04—Grading or sorting solid materials by dry methods, not otherwise provided for; Sorting articles otherwise than by indirectly controlled devices according to size
Landscapes
- Combined Means For Separation Of Solids (AREA)
- Winding, Rewinding, Material Storage Devices (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
SPIRAL COIL SEGREGATION
OF MOLDED PARTS
Abstract of the Disclosure Method and apparatus for the segregation of molded parts by the use of a coil conveyor. In the method,parts are deposited above and upon a rotatable spiral,which can have a baffle along at least one side, with some of the parts falling through openings in the spiral and others being advanced along its axis of rotation.
OF MOLDED PARTS
Abstract of the Disclosure Method and apparatus for the segregation of molded parts by the use of a coil conveyor. In the method,parts are deposited above and upon a rotatable spiral,which can have a baffle along at least one side, with some of the parts falling through openings in the spiral and others being advanced along its axis of rotation.
Description
Background of -the Invention This invention relates to the segregation of molded parts, and, more particularly, to the segregation of molded production parts from accompanying by-product parts that are formed in the molding process.
In the production of parts by molding, molten material is forced into the cavities of a mold through openings called sprues and channels called runners. ~hen the material has cooled sufficiently, the mold is opened and the desired product is expelled, along with the by-product formed in the runner and sprue. The latter is waste which must be segregated from the production parts. This can be done manually, but it is time consuming and inefficient.
To curtail the extent of the manual effort, a number of techniques have been devised for the automated segregation of the desired mold product from the undesired product. A machine for one such technique is disclosed in Canadian Patent No. 951,067.
The machine makes use of a conveyor belt which feeds the entire product from the mold to a "separator" or segregator in the form o~ coaxial disks on a shaft at the end of, and perpendicular to, the feed axis of the conveyor bélt. The disks are spaced so that the desired product will fall bet~een them and be collected, but the by-product will not. It is instead conveyed by scalloped or serrated peripheries of the disks to a waste collection station.
In this arrangement it is also desirable to have a second set of disks which are interposed with respect to the first set of disks.
In the production of parts by molding, molten material is forced into the cavities of a mold through openings called sprues and channels called runners. ~hen the material has cooled sufficiently, the mold is opened and the desired product is expelled, along with the by-product formed in the runner and sprue. The latter is waste which must be segregated from the production parts. This can be done manually, but it is time consuming and inefficient.
To curtail the extent of the manual effort, a number of techniques have been devised for the automated segregation of the desired mold product from the undesired product. A machine for one such technique is disclosed in Canadian Patent No. 951,067.
The machine makes use of a conveyor belt which feeds the entire product from the mold to a "separator" or segregator in the form o~ coaxial disks on a shaft at the end of, and perpendicular to, the feed axis of the conveyor bélt. The disks are spaced so that the desired product will fall bet~een them and be collected, but the by-product will not. It is instead conveyed by scalloped or serrated peripheries of the disks to a waste collection station.
In this arrangement it is also desirable to have a second set of disks which are interposed with respect to the first set of disks.
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In a variant of -the disk system, a drum with flexible lift pins is substituted for the disks. The spacing of the pins is in accordance with the spacing of the disks, so that the desired objects fall between the pins, ~hile the waste product is carried by the pins to a collection position.
While both the disk and clrum systems are a considerable improvement over manual segregation, they have the disadvan-tage of requiring a belt conveyor and separate drives for the conveyor and the segregator.
Furthermore, the disks~ the drum, the belt conveyor, and the requirement of two separate drives poses mechanical and maintenance problems.
In addition, fine filaments produced during molding accompany the parts and tend to get caught on the disks, the hub of the disks, and the pins of the drum. When this happens, -they cause interference with the desired searegation of wanted and unwanted parts. `
Finally, when the mold is changed, it is often necessary to change the segregator. However, the disks and drum segre-gators are not as easily changed as the mold, causing delayswhen production is switched from one product to another.
Accordingly, it is an object of the invention to facili-tate the segregation of molded parts. A related object is to facilitate the segregation of wanted and unwanted parts. Another related object is to facilitate the segregation of production parts from the sprue and runner parts produced during molding.
Another object is to achieve the automated segregation of molded parts without th~ need for a belt conveyor. A related .. -.......... . . ~ . : ................. . . .
.. ; ~ :. . :, . ~-. . . , , , ,, - .................... :
': . ' ' " , . ~ ' ',', , ' ' " ' . ~ ' ~` ' . ~ ' ' ' ` " . , , aB~'~
object is to realize automated segregation without the need for separate conveyor and segregator drive units.
A further object is to achieve automated segregation of molded parts without employing ~either disk or drum segrega-tors. A related object is to reduce the tendency for filaments formed during molding to cause interference in the segregation of molded parts.
Yet another object is to facilitate the interchange of segregators when required by virtue of a change in production molds.
Summary of *he Invention In accomplishing the foregoing and related objects, the invention provides for the segregation of objects such as molded parts or members by using a rotatable conveyor, with openings, to permit some of the members to be segregated by passing through the openings, while other members are segregated by being advanced by the conveyor in the direction of its axis of rotation to a collection station. The members that are segregated from one another are illustratively desired production parts and by-product parts formed during the molding process.
In accordance with one aspect of the invention, the rotatable conveyor is an open spiral which is advantageously in the form of a regular helix.
In accordance with another aspect of the invention, the helix is a coil with non-overlapping turns and is cantilever mounted for rotation about its l~ngitudinal axis.
In accordance with a further aspect of the invention, the pitch of the helix exceeds the maximum width of one type of : : , . :. : . ::
n~ r~ ~r ex~ le ~le ~sire~ rod~c:tioll p~rt, afl~ 4illlul-tanco~s~y is less than the minimulll width of ~nother tyre of m~lnber, for ex~mple the undesired wast~ p~rts~
In accordance with still other aspects of the invention, the coil is bayonet mounted for easy removability to facili- ~ `
tate the interchange of coils when a different pitch is requir~d for ~roper segregatiw~ ~f partsi t~ ~il i8 po~iti~ned directly below the output chute of the associated molding machine to ~liminate the need for a belt conveyor and itQ as~ociated drive motor; and baffles are provided to expcdite the desired segregation of parts and to control the delivery position. : :~
Description of the Drawin~s Ot~er aspects of the invention wil~ become apparerlt after considering several illustrative embodiments, taken in conjunc-tion with the drawings, in which:
FIGURE 1 is a perspective view of a system for practic-ing the invention;
l~IGUR~ 2 is a perspective v.i.ew of a portion of the system o~ E~l~Ul~ 1 illustratillg th~ practic~ of the invention; ;~
FIGUR~ 3A is a sectional view of the segregator in the system of FIGURE l;
FIGU~ 3s is a frontal view of the segregator in the system of FIGURE li F~GURE 3C is a plan view showing an alternative baffle for the segregator of FIGURE 3A;
FIGURE 4A i5 a perspective view of a further alternative ~ .
segregator; and :
FIGUR~ 4B is a plan view of the segregator of ~'IGURE 4~. ~ ~
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-: :', ', . ` ' . ., , ,`:,, ~etailed D~cri l~ti on ~ rurning to the drawinys, a pers~ective view of a sy~tem 10 for practicing tlle invention is shown io ~'lGUR~ 1.
A~ indicated, a segregator unit 20 in accordance with the invention is employed in conjunction with a standard molding machin~ 30. The latter includes a mold (not visible in FIGUR~ 1) with a protective cage 31, an output chute 32, c~ Lrol l>~ 33, a llol-[~r 3~ Eor rec:eiviny ti~t' matorial ~o ~e molded (in pellet form), a motor 35 for driving an injec- - :
tion screw ~not visible in FIGURE 1) within a barrel 36.
An illustrative molding machine 10 of the reciprocating screw injector type is ~*~t~ br4~ unit manufactured by the Boy ~chines Inc. of Plainvie~, New York.
~e se~regator uni~ 20 is positioned directly beneath --the output chute 32 of the machine 30. This eliminates the ~ ;
need for the kind o~ belt conveyor commonly found in the prior art segregator units A segregator unit 20 in accordance with the invention includes a spiral conveyor 21 in the form of a cantilever mounted coil which is driven by a motor 22. The spiral con-veyox 21 receives molded parts directly from the chute 32.
The desired production parts are guided through the open regions of the coil and are collected in a bin 23. The by-product parts are conveyed by the spiral motion of the coil in the direction indicated by the arrow A along the rotational axis, and are deposited in a bin 24. ~he by-product parts in the bin 24 are collected, manually or automatically by, -~
for example, an auger mechanism (not shown), and are reground for use as pellet fed material for the hopper 34 on ~ubsequent cycles.
.. .. . . . . . .
: ~ . : .
,: . . . ..
. .
'l'h~ mcthod o~ o~eration of tl~e se~regat~r unit 20 will be clear ~rom tll~ parti.al per3[cctive view o ~'l(iU~I. 2.
~urill~J eacl-l o~e)^ating cycl.e, after moltQn l~teria~. has been injec~ed into t~e cavity of tllle illustrative mold 3~.m and the mate;ial has solidified, the mold is separat~d a shown and ejector pins 31e force the molded product from the cavity 31c. 'rhe illu-~:trative product is in the form o~ a wire clip 31k, together with a by-product 31b formed by a sprue 31s and a r~nner 31r. The sprue 31s results from the .
molten materia] -that flows into the sprue opening 31a, while thc runner 31r is the connecting link between the part 31k an~ ru~ 31 The desired production part 31k and the by-product part -31b are connected in the cavity 31c, but become disconnected when tJle parts are ejecte.d from the mold.
After ejection, the parts 3Lk and 31b fall into the . :
chut.e 32 (not shown in FIGURE 2) and onto the spirhl conveyor 21. .
~`or illustration, FIGURE 2 shows parts 31k' and 31b', ?
whi.ch were produced during a prior cycle, in the course of being segregated in accordance with the invention. The desired, ~nd smaIIer, production part 31k' falls between the openings of the coil 21 into -the collection bin 23, which is shown with parts 31k'' from prior cycles of operation. The ~:
relatively larger by-product part 31b' is advanced by the spiral motion of the rotating coil 21 in the direction of the axial arrow A into the by-product collection bin 24, which is shown by by-pro~uct parts 31b'' from prior cycles.
,. : - ~ . ., ,, . :
Details of the segregator unit 20 are shown in the cross-sectional view of FIGURE 3A. The segregator unit 20 is in a frame 20f that mounts the driv~ motor 22. The h~ 22h of the drive motor 22 has a bayonet mount 22m for the conveyor coil 21. This permits easy interchange of the coil 21 with a coil of different pitch when needed because of a change in molds.
The coil 21 is a regular helix with a pitch 21p that i6 greater than the maximum width w of the desired part 31k, and simultaneously less than at least one dimension w, and desir-ably less than all width dimensions of the by-product part 31b.
As a result, the part 21k eventually falls into the collection bin 23, taking, for example, the trajectory Tl because of the rotational effect of the coil 21, but eventually falling through the gap between the ad]oining turns of the coil into the bin 23.
The by-product part 31b does not fall through the coil 21 and is illustratively advanced along the trajectory T2 into the by-product collection bin 24 at the free end of the coil.
As can be seen from the end view of FIGURE 3B, the by-product part 31b may be caught between the coil and one of theside baffles 26-1 or 26-2. In addition a shield 27 is mounted above the baffle 26-2 when the rotation of the coil 21 is such that there is a tendency for some of the by-product parts to be thrown upwardly from the coil during the spiraling motion. ~he baffles 26-1 and 26-2 are positionally adjustable, with the first baffle 26-1 being initially positioned with its tip near the coil 21 at about the axis of symmetry, and the second baffle 26-2 having its tip above the axis of symmetry.
: - , , . . , : , . : .
~ ! ' ' ' ::: ' : - , . : , Al~o as indicated in FIGUI~ 3~, auxiliary baffles 28-1 and 2~-2 are advantacJeously employed, with their tips near the lower position of the coil 21. .
Besides acting as deflectors for the production parts 31k, the lower baffles 28-1 and 28-2 can be proportioned as shown in the alternative embodiment of FIGU~E 3C with gradu-ated widths, for example Dl, D2 and D3, to provide a further .
segre~ation of different sized production parts into subcom-partr~nts of the bin ~4, for example 23-1, 23-2 and 23-3 for .:
parts 31k-1, 31k-2 and 31k-3 of three different sizes.
A coil conveyor in accordance with the invention may also be used for transporting objects from the interior of .
a machine for segregation outside of the machine as indicated in FIGUr2 ~A.
The coil 41 of FIGURE 4A extends into a production mach-ine 50 through a side panel 51, and is illustratively driven by a motor 42 (shown in phantom) mount~d on an opposite side ;
panel (not shown). This is by contrast with the coil 21 in FIGURE 1 which is positioned beneath the output chute 32 of a machine 30.
The o~jects to be segregated are released within the ma.chin.- 50 on th~ int~rior portion 4i-l of the coil 41. ;
VnliJie the baffles 38-1 and 28-2 of E'IGU~E 3B, the baffle 48-1 an~ 48-2 of FIGURE 4A have their tips 48t in contact or in close proximity within the machine 50, as can be more -- :
clearly seen in the plan view of ~'IGURE 4B.
Consequently, the desired production parts are held ~y the barfles 48-1 and 48-2 and advanced in the direc~ion of the axis of rotati.on A by the coil 41. -~a~
Just beyond where the baffles 48-1 and 48-2 leave -the machine 50 at the side panel 51, they are spaced apart by a distance D4 as indicated in FIGURE 4B. Accordingl~, the pro-duction parts are able to drop into a collection bin (not shown) as represented by a trajectory T3.
The embodiment of FIGURE 4~ also includes a frontal baffle 49 which is pi`vvtable about an axis B that is perpendiculax to the axis of rotation A. Occasionally some of the production parts become entangled with, and are carried by~ the by-product parts. The baffle 49 serves to jog the production parts from any entanglements, allowing them to fall into their collection bin. The by-product parts then pass from the intermediate region 41-2 of the coil and pass over the free end 41-3 into their own collection bin, for example along the trajectory T4.
While uarious aspects of the invention have been illus-trated by the foregoing detailed embodiments, it will be under-stood that various substitutions of equivalents may be made without departing from the spirit and scope of the invention as set forth in the appended claims.
,, - 10 `'~' ~. , ,
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~- :
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.~.: : .: : : : :
. -: : :,. ~- .- . :., , : .
In a variant of -the disk system, a drum with flexible lift pins is substituted for the disks. The spacing of the pins is in accordance with the spacing of the disks, so that the desired objects fall between the pins, ~hile the waste product is carried by the pins to a collection position.
While both the disk and clrum systems are a considerable improvement over manual segregation, they have the disadvan-tage of requiring a belt conveyor and separate drives for the conveyor and the segregator.
Furthermore, the disks~ the drum, the belt conveyor, and the requirement of two separate drives poses mechanical and maintenance problems.
In addition, fine filaments produced during molding accompany the parts and tend to get caught on the disks, the hub of the disks, and the pins of the drum. When this happens, -they cause interference with the desired searegation of wanted and unwanted parts. `
Finally, when the mold is changed, it is often necessary to change the segregator. However, the disks and drum segre-gators are not as easily changed as the mold, causing delayswhen production is switched from one product to another.
Accordingly, it is an object of the invention to facili-tate the segregation of molded parts. A related object is to facilitate the segregation of wanted and unwanted parts. Another related object is to facilitate the segregation of production parts from the sprue and runner parts produced during molding.
Another object is to achieve the automated segregation of molded parts without th~ need for a belt conveyor. A related .. -.......... . . ~ . : ................. . . .
.. ; ~ :. . :, . ~-. . . , , , ,, - .................... :
': . ' ' " , . ~ ' ',', , ' ' " ' . ~ ' ~` ' . ~ ' ' ' ` " . , , aB~'~
object is to realize automated segregation without the need for separate conveyor and segregator drive units.
A further object is to achieve automated segregation of molded parts without employing ~either disk or drum segrega-tors. A related object is to reduce the tendency for filaments formed during molding to cause interference in the segregation of molded parts.
Yet another object is to facilitate the interchange of segregators when required by virtue of a change in production molds.
Summary of *he Invention In accomplishing the foregoing and related objects, the invention provides for the segregation of objects such as molded parts or members by using a rotatable conveyor, with openings, to permit some of the members to be segregated by passing through the openings, while other members are segregated by being advanced by the conveyor in the direction of its axis of rotation to a collection station. The members that are segregated from one another are illustratively desired production parts and by-product parts formed during the molding process.
In accordance with one aspect of the invention, the rotatable conveyor is an open spiral which is advantageously in the form of a regular helix.
In accordance with another aspect of the invention, the helix is a coil with non-overlapping turns and is cantilever mounted for rotation about its l~ngitudinal axis.
In accordance with a further aspect of the invention, the pitch of the helix exceeds the maximum width of one type of : : , . :. : . ::
n~ r~ ~r ex~ le ~le ~sire~ rod~c:tioll p~rt, afl~ 4illlul-tanco~s~y is less than the minimulll width of ~nother tyre of m~lnber, for ex~mple the undesired wast~ p~rts~
In accordance with still other aspects of the invention, the coil is bayonet mounted for easy removability to facili- ~ `
tate the interchange of coils when a different pitch is requir~d for ~roper segregatiw~ ~f partsi t~ ~il i8 po~iti~ned directly below the output chute of the associated molding machine to ~liminate the need for a belt conveyor and itQ as~ociated drive motor; and baffles are provided to expcdite the desired segregation of parts and to control the delivery position. : :~
Description of the Drawin~s Ot~er aspects of the invention wil~ become apparerlt after considering several illustrative embodiments, taken in conjunc-tion with the drawings, in which:
FIGURE 1 is a perspective view of a system for practic-ing the invention;
l~IGUR~ 2 is a perspective v.i.ew of a portion of the system o~ E~l~Ul~ 1 illustratillg th~ practic~ of the invention; ;~
FIGUR~ 3A is a sectional view of the segregator in the system of FIGURE l;
FIGU~ 3s is a frontal view of the segregator in the system of FIGURE li F~GURE 3C is a plan view showing an alternative baffle for the segregator of FIGURE 3A;
FIGURE 4A i5 a perspective view of a further alternative ~ .
segregator; and :
FIGUR~ 4B is a plan view of the segregator of ~'IGURE 4~. ~ ~
" ~ ~ ~
`:` `: ; - `
-: :', ', . ` ' . ., , ,`:,, ~etailed D~cri l~ti on ~ rurning to the drawinys, a pers~ective view of a sy~tem 10 for practicing tlle invention is shown io ~'lGUR~ 1.
A~ indicated, a segregator unit 20 in accordance with the invention is employed in conjunction with a standard molding machin~ 30. The latter includes a mold (not visible in FIGUR~ 1) with a protective cage 31, an output chute 32, c~ Lrol l>~ 33, a llol-[~r 3~ Eor rec:eiviny ti~t' matorial ~o ~e molded (in pellet form), a motor 35 for driving an injec- - :
tion screw ~not visible in FIGURE 1) within a barrel 36.
An illustrative molding machine 10 of the reciprocating screw injector type is ~*~t~ br4~ unit manufactured by the Boy ~chines Inc. of Plainvie~, New York.
~e se~regator uni~ 20 is positioned directly beneath --the output chute 32 of the machine 30. This eliminates the ~ ;
need for the kind o~ belt conveyor commonly found in the prior art segregator units A segregator unit 20 in accordance with the invention includes a spiral conveyor 21 in the form of a cantilever mounted coil which is driven by a motor 22. The spiral con-veyox 21 receives molded parts directly from the chute 32.
The desired production parts are guided through the open regions of the coil and are collected in a bin 23. The by-product parts are conveyed by the spiral motion of the coil in the direction indicated by the arrow A along the rotational axis, and are deposited in a bin 24. ~he by-product parts in the bin 24 are collected, manually or automatically by, -~
for example, an auger mechanism (not shown), and are reground for use as pellet fed material for the hopper 34 on ~ubsequent cycles.
.. .. . . . . . .
: ~ . : .
,: . . . ..
. .
'l'h~ mcthod o~ o~eration of tl~e se~regat~r unit 20 will be clear ~rom tll~ parti.al per3[cctive view o ~'l(iU~I. 2.
~urill~J eacl-l o~e)^ating cycl.e, after moltQn l~teria~. has been injec~ed into t~e cavity of tllle illustrative mold 3~.m and the mate;ial has solidified, the mold is separat~d a shown and ejector pins 31e force the molded product from the cavity 31c. 'rhe illu-~:trative product is in the form o~ a wire clip 31k, together with a by-product 31b formed by a sprue 31s and a r~nner 31r. The sprue 31s results from the .
molten materia] -that flows into the sprue opening 31a, while thc runner 31r is the connecting link between the part 31k an~ ru~ 31 The desired production part 31k and the by-product part -31b are connected in the cavity 31c, but become disconnected when tJle parts are ejecte.d from the mold.
After ejection, the parts 3Lk and 31b fall into the . :
chut.e 32 (not shown in FIGURE 2) and onto the spirhl conveyor 21. .
~`or illustration, FIGURE 2 shows parts 31k' and 31b', ?
whi.ch were produced during a prior cycle, in the course of being segregated in accordance with the invention. The desired, ~nd smaIIer, production part 31k' falls between the openings of the coil 21 into -the collection bin 23, which is shown with parts 31k'' from prior cycles of operation. The ~:
relatively larger by-product part 31b' is advanced by the spiral motion of the rotating coil 21 in the direction of the axial arrow A into the by-product collection bin 24, which is shown by by-pro~uct parts 31b'' from prior cycles.
,. : - ~ . ., ,, . :
Details of the segregator unit 20 are shown in the cross-sectional view of FIGURE 3A. The segregator unit 20 is in a frame 20f that mounts the driv~ motor 22. The h~ 22h of the drive motor 22 has a bayonet mount 22m for the conveyor coil 21. This permits easy interchange of the coil 21 with a coil of different pitch when needed because of a change in molds.
The coil 21 is a regular helix with a pitch 21p that i6 greater than the maximum width w of the desired part 31k, and simultaneously less than at least one dimension w, and desir-ably less than all width dimensions of the by-product part 31b.
As a result, the part 21k eventually falls into the collection bin 23, taking, for example, the trajectory Tl because of the rotational effect of the coil 21, but eventually falling through the gap between the ad]oining turns of the coil into the bin 23.
The by-product part 31b does not fall through the coil 21 and is illustratively advanced along the trajectory T2 into the by-product collection bin 24 at the free end of the coil.
As can be seen from the end view of FIGURE 3B, the by-product part 31b may be caught between the coil and one of theside baffles 26-1 or 26-2. In addition a shield 27 is mounted above the baffle 26-2 when the rotation of the coil 21 is such that there is a tendency for some of the by-product parts to be thrown upwardly from the coil during the spiraling motion. ~he baffles 26-1 and 26-2 are positionally adjustable, with the first baffle 26-1 being initially positioned with its tip near the coil 21 at about the axis of symmetry, and the second baffle 26-2 having its tip above the axis of symmetry.
: - , , . . , : , . : .
~ ! ' ' ' ::: ' : - , . : , Al~o as indicated in FIGUI~ 3~, auxiliary baffles 28-1 and 2~-2 are advantacJeously employed, with their tips near the lower position of the coil 21. .
Besides acting as deflectors for the production parts 31k, the lower baffles 28-1 and 28-2 can be proportioned as shown in the alternative embodiment of FIGU~E 3C with gradu-ated widths, for example Dl, D2 and D3, to provide a further .
segre~ation of different sized production parts into subcom-partr~nts of the bin ~4, for example 23-1, 23-2 and 23-3 for .:
parts 31k-1, 31k-2 and 31k-3 of three different sizes.
A coil conveyor in accordance with the invention may also be used for transporting objects from the interior of .
a machine for segregation outside of the machine as indicated in FIGUr2 ~A.
The coil 41 of FIGURE 4A extends into a production mach-ine 50 through a side panel 51, and is illustratively driven by a motor 42 (shown in phantom) mount~d on an opposite side ;
panel (not shown). This is by contrast with the coil 21 in FIGURE 1 which is positioned beneath the output chute 32 of a machine 30.
The o~jects to be segregated are released within the ma.chin.- 50 on th~ int~rior portion 4i-l of the coil 41. ;
VnliJie the baffles 38-1 and 28-2 of E'IGU~E 3B, the baffle 48-1 an~ 48-2 of FIGURE 4A have their tips 48t in contact or in close proximity within the machine 50, as can be more -- :
clearly seen in the plan view of ~'IGURE 4B.
Consequently, the desired production parts are held ~y the barfles 48-1 and 48-2 and advanced in the direc~ion of the axis of rotati.on A by the coil 41. -~a~
Just beyond where the baffles 48-1 and 48-2 leave -the machine 50 at the side panel 51, they are spaced apart by a distance D4 as indicated in FIGURE 4B. Accordingl~, the pro-duction parts are able to drop into a collection bin (not shown) as represented by a trajectory T3.
The embodiment of FIGURE 4~ also includes a frontal baffle 49 which is pi`vvtable about an axis B that is perpendiculax to the axis of rotation A. Occasionally some of the production parts become entangled with, and are carried by~ the by-product parts. The baffle 49 serves to jog the production parts from any entanglements, allowing them to fall into their collection bin. The by-product parts then pass from the intermediate region 41-2 of the coil and pass over the free end 41-3 into their own collection bin, for example along the trajectory T4.
While uarious aspects of the invention have been illus-trated by the foregoing detailed embodiments, it will be under-stood that various substitutions of equivalents may be made without departing from the spirit and scope of the invention as set forth in the appended claims.
,, - 10 `'~' ~. , ,
Claims (10)
1. The method of segregating objects, which comprises depositing the objects above and upon a rotatable open spiral having a baffle placed therebeside and extending in the direc-tion of the axis of rotation of said spiral to permit some of said objects to pass through the openings in the spiral while advancing others of said objects in the direction of the axis of rotation of said spiral.
2. The method of claim 1 wherein said open spiral is a regular helix.
3. The method of claim 2 wherein said regular helix is a coil with non-overlapping turns and is rotatable about its lon-gitudinal axis.
4. The method of claim 3 wherein said coil has a pitch which exceeds the maximum width of one type of object and is less than at least one width dimension of another type of object.
5. The method of claim 1 wherein said rotatable spiral is cantilever mounted.
6. The method of claim 1 wherein said rotatable spiral is bayonet mounted for easy removability.
7. The method of claim 1 wherein said rotatable spiral is positioned directly below the output chute of a machine.
8. The method of claim 1 wherein said rotatable spiral has a plurality of baffles.
9. The method of claim 8 wherein said rotatable spiral has baffles in contact with one another positioned below said spiral to advance objects to a prescribed position.
10. Apparatus for segregating objects comprising a rotating open spiral and baffle along at least one side of said spiral for conveying some of said objects in the direc-tion of the axis of rotation and having openings therein for the passage of others of said objects therethrough.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US61504275A | 1975-09-19 | 1975-09-19 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1064864A true CA1064864A (en) | 1979-10-23 |
Family
ID=24463775
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA256,116A Expired CA1064864A (en) | 1975-09-19 | 1976-06-30 | Open spiral molded parts separator |
Country Status (5)
| Country | Link |
|---|---|
| JP (1) | JPS5252271A (en) |
| CA (1) | CA1064864A (en) |
| DE (1) | DE2642260A1 (en) |
| FR (1) | FR2324379A1 (en) |
| IT (1) | IT1068461B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2509660A1 (en) * | 1981-07-20 | 1983-01-21 | Boyard Const Mecaniques | Sepn. of multiple runner stacks from individual injection mouldings - by an archimedean screw gated to preferentially trap the stacks |
-
1976
- 1976-06-30 CA CA256,116A patent/CA1064864A/en not_active Expired
- 1976-09-16 IT IT2726476A patent/IT1068461B/en active
- 1976-09-20 JP JP11190476A patent/JPS5252271A/en active Pending
- 1976-09-20 FR FR7628190A patent/FR2324379A1/en active Granted
- 1976-09-20 DE DE19762642260 patent/DE2642260A1/en not_active Withdrawn
Also Published As
| Publication number | Publication date |
|---|---|
| FR2324379B3 (en) | 1979-07-06 |
| JPS5252271A (en) | 1977-04-26 |
| IT1068461B (en) | 1985-03-21 |
| FR2324379A1 (en) | 1977-04-15 |
| DE2642260A1 (en) | 1977-03-24 |
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