JP5042280B2 - Molded workpiece manufacturing method, deburring device, mold - Google Patents

Description

  The present invention relates to deburring of a workpiece manufactured from a mold, and more particularly to a technique for removing a burr portion of a workpiece after casting by an automatic processing machine.

Resin and metal molding is an important process in the manufacturing industry, but it is also a process with many problems. One of the problems is a process for removing a burr portion of a workpiece after forming. That is, when a protruding burr portion is generated at a portion in contact with the mating surface of the mold in the workpiece after molding, it is necessary to remove it by an operator's manual operation or an automatic processing machine.
When an operator manually removes burrs, it takes time unless he / she is used to the work, and if the work is a heavy object or a complicated structure, the work itself and the work environment may become severe.
Therefore, development of processing machines that can automatically and mechanically remove burrs has been in progress (see, for example, Patent Documents 1 and 2). The former is a structure in which a grinder is movable, and the processing machine is controlled by a load applied to the grinder. The latter is a deburring of a resin workpiece by a water jet mechanism. .

JP-A-53-126594 JP-A-9-193099

  However, the former has a problem that the burr removal site of the workpiece and the burr that can be removed are easily restricted. The latter has a problem that a process for removing or drying water after removing the burrs, an inspection process for removing water from the work, etc. are required, and depending on the work, a large amount of water is consumed.

  The present invention has been made in view of the above circumstances, and in order to reliably remove the burrs of the molded workpiece, the burrs of the workpiece are supposed to be devised, and the burrs of the entire workpiece are not required by manpower. An object of the present invention is to provide a method of manufacturing a molded workpiece, a deburring device, and a mold that can remove a portion and are excellent in terms of resource saving and energy saving.

As a means for solving the above-mentioned problems, the invention described in claim 1 is a method of forming a workpiece (for example, the workpiece 1 of the embodiment) by a mold (for example, the mold 11 of the embodiment) and an automatic having at least one processing tool. and performing the processing of the processing machine (e.g., an embodiment of the deburring device 15) by deburring and burr assumed site (e.g. embodiments of the thrust rib 7), was closed, the burr envisaged site, the work As a part where the occurrence of burrs is predicted, it consists of a driving rib (for example, the driving rib 7 of the example) set in a part along the parting line inside the concave part (for example, the concave part 4 of the example) of the workpiece, The processing of the expected burr occurrence portion is performed by removing the protruding top portion together with the burr (for example, the burr 3 of the embodiment) generated on the protruding top portion of the driving rib (for example, the protruding top portion 7a of the embodiment). And a corner R portion (for example, the corner R portion 9 of the embodiment) is allowed to remain in the corner portion (for example, the corner portion 8 of the embodiment) of the concave portion, and the burr removal and the processing of the expected burr generation portion are performed. In the process of performing the above, machining of the main body of the workpiece is added .
According to a second aspect of the present invention, there is provided a deburring device as an automatic processing machine (for example, the deburring device 15 of the embodiment) used in the method of manufacturing a molded workpiece according to the first aspect. (For example, the flat end mill 21 of the embodiment) and a ball end mill (for example, the ball end mills 22 and 23 of the embodiment).
The invention described in claim 3 is characterized by having a plurality of ball end mills having different diameters (for example, the ball end mills 22 and 23 of the embodiments).
According to a fourth aspect of the present invention, in the mold (for example, the mold 11 of the embodiment) used in the method of manufacturing a molded workpiece according to the first aspect , a split mold (for example, the cavity 11c of the embodiment) is formed. For example, burrs that protrude from the main body portion of the workpiece (for example, the main body portion 1a of the embodiment) are generated on at least one of the mold alignment surfaces (for example, the mold alignment surface B of the embodiment) of the fixed mold 11a and the movable mold 11b of the embodiment. It is characterized in that a concave portion for forming an assumed portion (for example, the follow-up rib 7 in the embodiment) is provided.

According to the present invention , if there is no problem in function and design in the workpiece design stage, a discarded rib (a rib that may be left out) or the like is formed in the expected burr occurrence portion, and this projected burr occurrence expected portion. The burrs are generated at the tip of the workpiece, and some of the ribs and the like may remain after removing the burrs. The burr can be completely removed without removing the part.
Here, although the machining allowance should be surely removed in the automatic processing machine, the dimensions are shifted due to the sag of the mold. In the present invention, the management width considering them can be set large by providing ribs, etc., and burrs can be reliably removed with the management width without re-teaching of an automatic processing machine, and the workpiece is shaved more than necessary. It can be avoided.
Thus, while eliminating or suppressing the occurrence of burrs, allowing the generation of burrs and removing this together with the projected burrs occurrence site, while molding the workpiece in the existing casting process, It is possible to completely remove burrs with an automatic processing machine and prevent the main body of the workpiece from being shaved.
According to the present invention , as long as there is no problem in terms of function and design, the driving rib provided on the workpiece is used as a burr generation assumption portion, and a burr is generated here, and the burr can be removed together with the driving rib , and By making it possible to leave the corner R portion as the driving rib, it is possible to completely remove burrs with an automatic processing machine and to prevent the main body portion of the workpiece from being cut.
According to the present invention , machining related to deburring and workpiece main body machining can be performed simultaneously in one process, and the machining time can be reduced by reducing processes such as workpiece transfer and positioning that need to be performed multiple times. Can be shortened.
According to the present invention , for example, a flat end mill performs surface grinding or cutting of a burr portion having a thickness of 2 mm or more, and a ball end mill performs a burr removal or edge processing of a closed hole, etc. Not only can the main body be processed at the same time.
According to the present invention , the thin ball end mill can be used for the processing of extremely small parts and closed holes, and the thick ball end mill can be used for the processing of parting parts and other parts, so that the entire workpiece can be processed efficiently. it can.
According to the present invention , the part (parting line) in contact with the die-matching surface of the workpiece is likely to be burred, and a convex burr occurrence assumed part is formed in this part, and conversely, the main body of the workpiece is formed on the mold side. By providing a recess for molding the expected burr occurrence part protruding from the part and generating a burr at the tip of the expected burr occurrence part, the burr can be removed without removing the main part of the workpiece when removing the burr with an automatic processing machine. Can be completely removed.

It is a side clear view of the die-cast apparatus in the Example of this invention. It is a front view of the deburring apparatus of the shaping | molding workpiece | work in the Example of this invention. It is a perspective view of the tool changer of the said deburring apparatus. It is a side view of the multiple types of end mill which the said deburring apparatus has, (a) shows a flat end mill, (b) shows a thick ball end mill, (c) shows a thin ball end mill, respectively. It is a side view of the holder which fixes each said end mill to a tool changer, (a) is for flat end mills, (b) shows each ball end mill. It is sectional drawing of the burr generation | occurrence | production assumption part of the shaping | molding workpiece in the reference example of this invention, (a) shows before burr removal, (b) shows after burr removal, respectively. It is sectional drawing of the site | part corresponding to the said burr | flash generation assumption site | part of the metal mold | die in the reference example of this invention. It is sectional drawing of the burr generation | occurrence | production assumption part of the shaping | molding workpiece in the modification of the said reference example , (a) shows before burr removal, (b) shows after burr removal, respectively. It is sectional drawing of the site | part corresponding to the said burr | flash generation assumption site | part of the metal mold | die in the said modification. It is sectional drawing of the burr generation | occurrence | production assumption part of the shaping | molding workpiece | work in the other modification of the said reference example , (a) shows before burr removal, (b) shows after burr removal, respectively. It is sectional drawing of the site | part corresponding to the said burr | flash generation assumption site | part of the metal mold | die in the said other modification. It is sectional drawing of the burr generation | occurrence | production assumption part of the shaping | molding workpiece in the 2nd reference example of this invention, (a) shows before burr removal, (b) shows after burr removal, respectively. It is explanatory drawing of the burr generation | occurrence | production assumption part of the shaping | molding workpiece in the Example of this invention, (a) is a perspective view before a burr removal, (b) is a perspective view after a burr removal, (c) is a cross section after a burr removal Each figure is shown.

  Embodiments of the present invention will be described below with reference to the drawings.

<Example>
FIG. 1 shows an outline of a die casting apparatus 10 for forming a mission case of a vehicle engine, for example. Here, reference numeral 11 in the figure denotes a mold (mold), and reference numeral 12 denotes an injection sleeve.

  The mold 11 is divided into upper and lower parts by a substantially horizontal dividing surface (die fitting surface) B. Hereinafter, the lower split mold in the figure is the fixed mold 11a, and the upper split mold is the movable mold 11b. The movable mold 11b advances and retreats between a state in which the movable mold 11b is in close contact with the fixed mold 11a on the mold matching surface B (mold clamping state) and a state in which the movable mold 11b moves upward from this state and is separated from the fixed mold 11a (mold opening state). It is movable.

  In the mold clamping state, a cavity 11c is formed in the gap between the two divided molds 11a and 11b, and the molten aluminum Y injected from the injection sleeve 12 is filled in the cavity 11c. By solidifying the molten metal Y, an aluminum die cast product (work 1) having a predetermined shape is formed.

  That is, in the casting process (molding process) of the workpiece 1, first, the mold 11 is clamped to form the cavity 11c, and then the molten metal Y is injected and filled from the injection sleeve 12 into the cavity 11c. Then, after the molten metal Y is cooled and solidified, the mold 11 is opened to obtain the workpiece 1 which is a cast product.

  Since the workpiece 1 immediately after molding has a gate 2 or a burr 3 (see FIG. 6 (a), etc.) for pouring or airing mainly on a parting line (intersection with the mold-matching surface B), A process for removing these is required. A mission case, which is the final product, is obtained by performing this burr removal process and machining the main body portion 1a of the workpiece 1 by the same or separate process.

FIG. 2 shows an example of a deburring device (automatic processing machine) 15 for performing the deburring process. The deburring device 15 holds the workpiece 1 in the processing chamber 16 via a jig 17, and performs machining such as deburring on the workpiece 1 with a processing blade held on the robot arm 18.
The deburring device 15 is an NC processing machine that allows the workpiece 1 and the robot arm 18 to operate on a plurality of axes.

  3 and 4, the robot arm 18 includes a tool changer 19 that can automatically replace, for example, three types of end mills 21, 22, and 23 (processing blades). One of the end mills 21, 22, 23 is a flat end mill 21 having a blade portion 21a having a diameter of 24 mm, and the other two are ball end mills 22, 23 having a blade portion 22a, 23a having a diameter of 9 mm or 6 mm. It is. The flat end mill 21 has a cylindrical shape with a flat tip, and has a plurality of machining tips 21b made of diamond or the like on the outer periphery of the blade portion 21a. On the other hand, each of the ball end mills 22 and 23 has a cylindrical shape with a hemispherical tip, and has a plurality of machining tips 22b and 23b made of diamond or the like on the outer periphery of the blade portions 22a and 23a. Each of these end mills 21, 22, and 23 is an existing one.

  The flat end mill 21 mainly grinds the surface of the workpiece 1 using the outer periphery of the blade portion 21a, and the ball end mills 22 and 23 mainly cover and close the part 1 of the workpiece 1 using the outer periphery and tip of the blade portions 22a and 23a. Edge processing is performed on the hole. The 6 mm ball end mill 23 is mainly used for processing the minimum part of the work 1 and the closed hole, and the 9 mm ball end mill 22 is mainly used for processing the parting part of the work 1 and other parts. It is done. This is because the thin ball end mill 23 can be used for processing various parts, but it is not efficient when used for all parts, while the thick ball end mill 22 can efficiently process a wide part, but the minimum part or the closed hole. This is because it is difficult to respond to the department.

  A shank portion 21c having a diameter of 25 mm is connected to the proximal end side of the blade portion 21a of the flat end mill 21, and the shank portion 21c is inserted into the inner end of the holder 24 fixed to the tool changer 19 so as to be integrally rotatable. The Similarly, shank portions 22c and 23c having a diameter of 8 mm are connected to the base end sides of the blade portions 22a and 23a of the ball end mills 22 and 23, and the shank portions 22c and 23c of the holder 25 fixed to the tool changer 19 are connected. It is inserted inside the tip and is held so as to be integrally rotatable. Flat portions 21d, 22d, and 23d for pressing the fixing screws to the holders 24 and 25 are provided on the side surfaces of the shank portions 21c, 22c, and 23c of the end mills 21, 22, and 23, respectively.

  Referring also to FIG. 5, shank portion insertion holes 24a and 25a are provided at the distal ends of the holders 24 and 25, and screw holes for attaching the fixing screws are provided at the distal portions of the holders 24 and 25. 24b and 25b are provided.

  As the robot arm 18, any one of the end mills 21, 22, and 23 is appropriately selected according to the processing part of the work 1, and the burr removal and the main part 1 a of the work 1 (parts related to the function and design of the work 1 are performed ) Part or all of the machining. Note that the robot arm 18 may perform only the deburring of the workpiece 1.

<Reference example for explaining an example>
Here, referring to FIG. 6A, the burr occurrence expected portion (on the parting line) in the workpiece 1 protrudes to the outside of the surface of the workpiece 1 along the die matching surface B, for example, a semicircular cross section. The ribs 5 are continuously projected. The rib 5 constitutes an expected burr generation part of the workpiece 1, and the burr 3 generated on the parting line of the workpiece 1 is outside the surface of the workpiece 1 along the die-matching surface B from the protruding top 5 a of the rib 5. It occurs to protrude to When the burr 3 is removed, the burr 3 is removed together with the protruding top 5a of the rib 5 (see FIG. 6B).

  In addition, on the parting line of the workpiece 1, a few unintended protrusions may be formed along the parting line. Unlike such protrusions, the rib 5 is positively formed on the parting line. The burr 3 is generated aiming at the protruding top 5a of the rib 5. In other words, the present invention does not eliminate or suppress the generation of burrs in the formed workpiece, but allows the generation of burrs, and can be easily implemented by an existing casting process.

  Referring also to FIG. 7, in the mold 11 of the workpiece 1, the edge portion (corner portion) on the cavity 11 c side of the die mating surface B is cut into a predetermined shape, thereby forming the rib 5. A recess 14 is formed. The concave portion 14 has a semicircular cross section with the intersection with the mold matching surface B as the top, and the burr 3 is formed so as to protrude from the top along the mold matching surface B. The ribs 5 are made of the flesh of the workpiece 1 and are discarded ribs that are not related to the function and design of the workpiece 1, and the protruding height of the workpiece 1 from the main body portion 1a is about 1.5 mm.

  Here, the mold 11 shown in FIG. 7 forms the concave portion 14 across both the movable mold 11b and the fixed mold 11a (the edges on the cavity 11c side of both molds 11a and 11b are cut off). 9), as shown in FIG. 9, only one edge of both molds 11a and 11b is cut out to form a concave section 14 'having a sectional fan shape, and the workpiece 1 is formed by the concave section 14' as shown in FIG. 8 (a). A rib 5 'having a fan-shaped cross section may be formed on the rib 5', the burr 3 may be generated at the protruding top 5a 'of the rib 5', and the burr 3 may be removed together with the protruding top 5a 'of the rib 5' (FIG. 8 ( b)).

  Further, as shown in FIG. 11, one edge of both molds 11a and 11b is subjected to R chamfering (or C chamfering) to form a sharp-angle-shaped concave portion 14 ″, and the concave portion 14 ″ allows the portion shown in FIG. ) To form a burr 3 on the protruding top 5a ″ of the rib 5 ″ and remove the burr 3 along with the protruding top 5a ″ of the rib 5 ″. (See FIG. 10B).

  In the case where there is no rib, if the burr 3 of the workpiece 1 is to be completely removed, the main body portion 1a of the workpiece 1 may be cut by the machining blade, and a concave aggression is generated in the portion. Sometimes. On the other hand, if the above-mentioned aggression is not caused, the burr 3 at the part cannot be completely removed and the burr 3 may be left on the work 1.

On the other hand, in this reference example , the ribs 5, 5 ′, 5 ″ are protruded from the expected burr occurrence part (on the parting line) of the work 1, and the protruding top portions 5 a of the ribs 5, 5 ′, 5 ″ The burr 3 is generated in 5a ′, 5a ″, and the base end side of the ribs 5, 5 ′, 5 ″ may be left on the work 1, so that the ribs 5, 5 ′ are removed when the burr is removed by an automatic processing machine. , 5 ″ can be removed together with the tip side, and the cutting blade is driven to remove the ribs 5, 5 ′, 5 ″ without causing the main body portion 1a of the work 1 to be angled. That is, it is possible to easily and surely prevent the body 1a of the work 1 from being scraped and causing the burrs or leaving the burrs 3 on the work 1 when removing the burrs.

Even if there is a management width, it is difficult to remove the burr 3 completely or to prevent the main body portion 1a of the work 1 from being damaged beyond the management width in a simple burr removal operation by an operator or an automatic machine. is there. Therefore, as in this reference example, the ribs 5, 5 ′, 5 ″ are formed at the assumed burrs in the workpiece 1, and a part of the ribs 5, 5 ′, 5 ″ remains even after the burrs are removed. By allowing it, the burr 3 can be surely removed, and the main body portion 1a of the work 1 can be prevented from being damaged.

As described above, the method of manufacturing a molded workpiece in the reference example described above includes the steps of molding the workpiece 1 and the automatic processing machine (deburring) in the process of removing the burrs of the workpiece 1 manufactured from the mold 11. The apparatus 15) includes a step of performing burr removal and processing of a burr occurrence assumed portion, and the burr occurrence assumed portion is a rib 5, 5 set to a portion where burr occurrence of the workpiece 1 is predicted. The ribs 5, 5 ′, 5 ″ are partially allowed to remain after removing burrs.

According to this configuration, if there is no problem in terms of function and design in the workpiece design stage, the ribs 5, 5 ′, 5 ″ (ribs that may be left or not) are formed in the burr occurrence assumed portion, and this rib The burr 3 is generated at the protruding top portions 5a, 5a ', 5a "of 5, 5', 5", and a part of the ribs 5, 5 ', 5 "may be left after the burr is removed. The burr 3 can be removed together with the tip side of the ribs 5, 5 ′, 5 ″ when removing the burr by the processing machine, and the burr 3 can be completely removed without cutting the main body portion 1 a of the workpiece 1.
In this way, instead of eliminating or suppressing the generation of burrs, the burrs are allowed to occur and then discarded together with the ribs 5, 5 ′, 5 ″ to form the workpiece 1 in the existing casting process. However, it is possible to completely remove the burr 3 with an automatic machine and prevent the main body portion 1a of the workpiece 1 from being scraped.

  Moreover, the manufacturing method of the said shaping | molding workpiece | work adds the main body process of the said workpiece | work 1 to the process of performing the process of the said burr | flash removal and the burr generation | occurrence | production assumption part (rib 5, 5 ', 5' '), The processing related to deburring and the main body processing of the workpiece 1 can be performed simultaneously in the process, and the processing time such as transfer and positioning of the workpiece 1 that needs to be performed a plurality of times can be reduced to shorten the processing time. it can.

  Further, the deburring device 15 as an automatic processing machine used in the method for manufacturing a formed workpiece has a flat end mill 21 and ball end mills 22 and 23 as processing blades of the workpiece 1, and a plurality of ball end mills having different diameters from each other. By having 22 and 23, for example, the flat end mill 21 performs surface grinding or cutting of a burr portion having a thickness of 2 mm or more, and the ball end mills 22 and 23 perform edge processing of a parting part or a closed hole part. In addition to removing the burrs from the entire workpiece 1, the main body can be processed at the same time. In addition, the thin ball end mill 23 can be used for the processing of extremely small parts and closed holes, and the thick ball end mill 22 can be used for the processing of parting parts and other parts. it can.

  The mold 11 used in the method for manufacturing a molded workpiece protrudes from the main body portion 1a of the workpiece 1 on at least one mold-matching surface B of the split mold (fixed mold 11a and movable mold 11b) that forms the cavity 11c. Even if burrs 3 are generated at a part (parting line) in contact with the die-matching surface B in the workpiece 1 by providing the recesses 14, 14 ', 14 "for forming the ribs 5, 5', 5" By automatically forming a convex burr occurrence part (discarding rib 5, 5 ', 5 ") at this part and generating a burr 3 at the tip part (projection top part 5a, 5a', 5a"), automatic When removing the burrs by the processing machine, the burrs 3 can be completely removed without cutting the main body portion 1a of the workpiece 1.

<Second Reference Example for Explaining Examples>
Next, a second reference example of the present invention will be described with reference to FIG.
The second reference example is different from the reference example in that the apex 6a of the outwardly projecting corner 6 in the work 1 is provided so as to contact the die-matching surface B, and the burr 3 generated in the parting line is provided in the corner. 6 is generated at the top portion 6a (unnecessary end portion), and the burr 3 is removed together with the top portion 6a of the corner portion 6. The same reference numerals are assigned to the same portions as in the reference example, and the description thereof is omitted. To do.

  In FIG. 12A, the top portion 6a of the corner portion 6 is a parting edge of the workpiece 1 (die 11), and the die 11 is designed so that the parting line is positioned at the corner portion 6a. And the burr | flash 3 which protrudes outward along the type | mold matching surface B (outer surface of the corner | angular part 6) can be removed with the top part 6a by cutting to chamfer the top part 6a of the corner | angular part 6, for example. (See FIG. 12 (b)).

As described above, in the method for manufacturing a molded workpiece according to the second reference example , the estimated burr generation portion is composed of an unnecessary end (top portion 6a) where the occurrence of burr of the workpiece 1 is predicted, and the unnecessary end is The burrs 3 are allowed to be removed together with the burrs.
According to this configuration, as long as there is no problem in terms of function and design, an unnecessary end portion such as an edge portion of the work 1 is generated as a burr generation assumed portion, and the burr 3 is generated along with the unnecessary end portion. By removing it, it is possible to completely remove the burrs 3 with an automatic machine and prevent the main body portion 1a of the workpiece 1 from being cut more than necessary.

<Example>
Next, an embodiment of the present invention will be described with reference to FIG.
In this embodiment, when the parting line crosses the recess 4 of the workpiece 1 with respect to the reference example , a driving rib 7 (set angle driving margin portion, hereinafter referred to as a set angle driving margin portion) along the parting line is formed inside the recess 4. The burr 3 generated in the parting line is generated at the protruding top 7a of the rib 7, and the burr 3 is removed together with the protruding top 7a of the rib 7. The main difference is that the corner R portion 9 having an inner diameter equal to or larger than the outer diameter of the tip of the machining blade (for example, a small-diameter ball end mill 23) remains in the corner portion 8 of the concave portion 4, and the same reference numerals are given to the same portions as in the reference example . Therefore, the description is omitted.

  In FIG. 13A, when removing the burr 3 together with the rib 7 inside the recess 4, the burr is removed before the corner 8 of the recess 4 without scraping the main body portion 1a of the workpiece 1 with an arbitrary processing blade. The corner R portion 9 remains in the corner portion 8 of the recess 4 so that the burr can be removed up to the corner portion 8 of the recess 4 without driving the cutting tool and scraping the main body portion 1a of the workpiece 1. (See FIGS. 13B and 13C). If the corner R portion 9 is not left in the corner portion 8 of the concave portion 4, the main body portion 1a of the workpiece 1 may be scraped when the processing blade is driven toward the workpiece side. In FIGS. 13B and 13C, the ribs 7 are all removed except for the corner R portion 9. However, if there is no problem in function and design, the base end side of the ribs 7 may be left.

As described above, in the method of manufacturing a molded workpiece according to this embodiment, the burr occurrence assumed part is composed of the set angle driving margin portion (the driving rib 7) where the burr generation of the workpiece 1 is predicted. The driving allowance portion allows the corner R portion 9 to remain after removing the burr.
According to this configuration, within the range where there is no problem in terms of function and design, the burr 3 is generated here using the set angle driving allowance (the driving rib 7) provided in the work 1 as the burr generation assuming unit, and the set angle driving is performed. The burr 3 can be removed together with the margin, and the set angle driving margin can be allowed to leave the corner R portion 9 so that the burr 3 can be completely removed by an automatic processing machine, and the workpiece 1 It is possible to prevent the main body portion 1a from being cut out.

The present invention is not limited to the above-described embodiment. For example, the entire workpiece 1 may be deburred by appropriately combining the ribs 5, 5 ′, 5 ″, the corners 6, the driving ribs 7, and the like. Moreover, the present invention is not limited to aluminum casting, and can be applied to deburring of various molded workpieces such as casting of other materials and resin molding.
Further, the workpiece 1 is not limited to the mold 11 and may be molded by a resin mold, a sand mold, or the like.
Further, the deburring device 15 (automatic processing machine) is not limited to each of the end mills 21, 22, 23, and may include a drill, a router, or a processing tool using laser, gas, or the like.
And the structure in the said Example is an example of this invention, and it cannot be overemphasized that a various change is possible in the range which does not deviate from the summary of the said invention.

1 Workpiece 1a Body part 5, 5 ', 5 "Rib (Burr generation expected part)
6a Top (unnecessary end, expected occurrence of burr)
7 Drive-in rib (set angle drive-in margin, expected burr occurrence part)
11 Mold 11a Fixed mold 11a (split mold)
11b Movable type 11b (split type)
11c Cavity 11c
B-type mating surface 14, 14 ', 14 "recess 15 Deburring device (automatic processing machine)
21 Flat end mill (processing tool)
22, 23 Ball end mill (processing tool)

Claims (4)

Type by possess the steps of forming a workpiece, and performing a burr removing the burr assumptions site processing by an automatic processing machine having at least one machining tool, and
The burr occurrence assumed part consists of a driving rib set at a part along the parting line inside the concave part of the work as a part where the burr occurrence of the work is predicted,
The processing of the expected burr occurrence site removes the protruding top together with the burr generated on the protruding top of the driving rib, and allows the corner R portion to remain at the corner of the recess,
A method of manufacturing a molded workpiece , comprising: adding a main body processing of the workpiece to the step of performing the burr removal and the burr generation assumed portion . In the deburring device as an automatic processing machine used in the method for manufacturing a molded workpiece according to claim 1 ,
A deburring apparatus comprising a flat end mill and a ball end mill as the workpiece cutting tool. The deburring device according to claim 2 , further comprising a plurality of ball end mills having different diameters. In the metal mold | die used for the manufacturing method of the molded workpiece of Claim 1 ,
A die having a concave portion for molding a burr generation expected portion protruding from a main body portion of the workpiece on at least one die mating surface of a split die forming a cavity.

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