KR102494506B1 - Block mould structure for injection compression mould - Google Patents

Abstract

The present invention improves the coupling groove structure of the injection mold in which the slide core is seated and coupled to reduce processing errors during processing of the slide core for the injection mold, and improves the coupling structure of guide rails supporting both sides of the slide core. The present invention relates to a mold block structure for an injection mold having an improved structure so as to prevent shaking of a slide core during processing.

Description

Mold block structure for injection mold {BLOCK MOLD STRUCTURE FOR INJECTION COMPRESSION MOLD}

The present invention relates to a mold block structure for an injection mold, and in particular, it is possible to reduce processing errors during processing of a slide core for an injection mold by improving the coupling groove structure of the injection mold in which a slide core is seated and coupled, and both sides of the slide core It relates to a mold block structure for an injection mold whose structure is improved to prevent shaking of a slide core during processing by improving the coupling structure of a guide rail supporting the.

In general, a slide core for forming an area where an undercut may occur is installed in an injection mold, and the slide core is generally configured to slide in a horizontal direction by an angler pin installed inclined at a predetermined angle.

In addition, the slide core is configured to slide horizontally by the angler pin and then return to its original position by an elastic restoring force such as an elastic spring.

As the prior art for the above purpose, Korean Patent Registration No. 1421817 "Mold Device" (Registration Date: 2014.07.15) is disclosed.

The mold apparatus of the prior art includes a lower core disposed in a lower fixing part, an upper core capable of relative movement with respect to the lower core, forming a cavity for injection between the lower core and disposed on an upper plate, and , a slide core disposed to be horizontally movable in the lower core and forming an undercut of the cavity, and a slide body capable of engaging and fastening with the slide core and sliding by engaging relative movement with an inclined pin disposed in the upper core A slide portion having a slide portion, and a slide fastening portion enabling engagement and fastening of the slide core and the slide body, wherein the slide fastening portion is movably fastened in a direction perpendicular to the sliding movable direction of the slide body, and the slide fastening The part is formed at an end of the slide core and can accommodate the end side of the slide body, and a slide formed at an end of the slide body toward the slide core and at least a part of which can be accommodated in the slide core fastening portion. A body fastening part, the slide core fastening part, a core fastening accommodating part capable of accommodating one end of the slide body fastening part, and a plurality of core fastening extensions extending from an outer end of the core fastening accommodating part toward the slide body. and a core fastening engaging part protruding from an end of the core fastening extension toward the other core fastening extension, wherein the slide body fastening part protrudes from one end of the slide body to be accommodated in the core fastening receiving part. A slide body fastening accommodating part formed on the extending fastening body and formed perpendicularly to the sliding direction of the slide body, a slide body fastening elastic part accommodated in the slide body fastening accommodating part, and the slide body fastening elastic part It consists of a slide body fastening locker elastically supported by and engaged and engaged with the core fastening locking portion to be releasable.

However, in the mold device disclosed in the patent document, an elastic spring is installed for sliding operation. Such an elastic spring may be deformed due to repeated use, and the slide body may not slide smoothly due to the deformation of the elastic spring. As a result, the product after molding is bitten by the upper mold, and there is a problem in that the ejection defect of the molded product occurs.

Therefore, it is required to develop a slide core for an injection mold having an improved structure so that a sliding motion can be smoothly performed without using an elastic spring.

As disclosed in Korean Patent Registration No. 10-2239342 "Injection mold with structure-improved slide core" (registration date: 2021.04.06), other conventional prior art related to the existing slide core has a predetermined depth in the lower mold. A base block of a predetermined size to be inserted and installed; Guide blocks installed in the lower mold and installed at a predetermined interval along both sides of the base block with first and second blocks spaced apart from each other; a slide block installed between the first and second blocks and sliding in a horizontal direction; A fixed block having an installation hole inclined at a predetermined angle while being fixedly installed in the upper mold; It includes an angler pin that is installed through the installation hole so that the lower end protrudes downward by a predetermined length and slides the slide block, and holes of a predetermined diameter are formed vertically in the slide block, and the hole has a ball on the bottom surface. The mounted ball plunger is inserted, and fixing grooves having a predetermined depth for fixing the sliding position of the slide block by selectively inserting a ball of the ball plunger are formed in the lower mold and the base block.

However, when an error occurs in the processing of both inner walls coupled so that the guide rails are in surface contact due to the tool vibration phenomenon while processing the tool on the upper side of the rim to process the slide core, surface contact with both inner walls There is a possibility that malfunction of the slide core supported by the guide rail may occur.

Korean Patent Registration No. 1421817 "Mold Device" (registration date: 2014.07.15) Korean Patent Registration No. 10-2239342 "Injection mold with slide core with improved structure" (registration date: 2021.04.06)

The present invention was created to solve these problems in view of the above-mentioned problems, and the purpose thereof is to improve the structure of the coupling groove of the injection mold in which the slide core is seated and coupled to reduce processing errors during processing of the slide core for the injection mold In addition, to provide a mold block structure for an injection mold with an improved structure so as to prevent shaking of the slide core during processing by improving the coupling structure of guide rails supporting both sides of the slide core.

The present invention for achieving the above object is a block structure for an injection mold consisting of an upper mold block and a lower mold block: the upper mold block of the block structure for injection mold has an upper side so that a slide core is coupled to one side of the upper mold block A coupling groove formed concavely and; Guides that are in close contact with the inner walls facing each other on the left and right sides of the coupling groove and coupled as fastening members to the concave stepped grooves formed higher than the height of the central portion in the pull-out direction of the slide core on both left and right sides of the upper surface of the coupling groove rail; fitting grooves, the lower portions of which are open on both left and right sides of the coupling groove, and which are concave upward at the boundary of the stepped groove on the upper surface of the coupling groove and formed in the direction of the slide core's withdrawal; a support member having a rectangular cross-section that is seated in the fitting groove and fixed with a fastening member, and supports one side surface of the guide rail and an upper surface side end side of the slide core in surface contact; a support block coupled to protrude downward from the middle portion of the coupling groove; an accommodation groove concavely formed on the upper surface of the slide core and coupled to the supporting block in a concave-convex shape; And a locking piece coupled to the side surface of the upper mold block to prevent the slide core from moving in the lateral direction.

Each of the guide rails has a lower part in a state in which the upper part is in close contact with the side surface of the support member to prevent downward departure of the slide core, and the lower part is in surface contact with the side surface of the slide core, and the stepped portion is formed on the rim of the slide core. The width of the lower part of the stepped part is formed to be larger than the width of the upper part in contact with the support member so as to be coupled to interfere with the jaw, the fitting groove is formed in the form of a rectangular cross-section groove, and one side depth into which the guide rail is fitted is It is characterized in that it is formed smaller than the depth of the other side.

The fitting groove is formed in a tapered structure in which the width becomes narrower from the outside to the inside, and the inner and outer widths of the support member are formed in a tapered structure to correspond to the fitting groove.

In one embodiment of the present invention, fitting grooves are formed on the left and right upper surfaces of the coupling groove to which the slide core is coupled, and a support member coupled to be seated in the fitting groove supports the upper part of the guide rail, and the guide The lower part of the rail is supported in contact with both sides of the slide core, and the stepped part of the guide rail is disposed to interfere with the lower side of the fixing jaw of the slide core to prevent downward movement of the slide core while supporting it to prevent lateral movement. has the advantage of

Since the fitting groove of the present invention is formed so that the depth of one side close to the guide rail side is located at a height smaller than the depth of the other side, it has the advantage that the support and assembly work of the guide rail with respect to the support member can be performed easily.

In addition, since the locking piece is coupled to the center of the coupling groove, it has an advantage of preventing the slide core from lateral deviation.

Another embodiment of the present invention has a useful advantage of increasing the convenience of assembling the guide rail and the slide core as well as assembling the guide rail in place as the wedge-shaped support member is coupled in a sliding manner in the fitting groove. .

1 is a configuration diagram schematically showing upper and lower mold blocks to which a block structure for an injection mold according to the present invention is applied.
Figure 2 is a rear perspective view of the upper mold block for the injection mold of the present invention as viewed from the lower side.
Figure 3 is a perspective view showing a state in which the slide core is coupled into the coupling groove of the present invention.
Figure 4 is a side view of Figure 3;
Figure 5 is a perspective view showing a modified embodiment of the present invention support member and fitting groove.
Figure 6 is a coupling state diagram of Figure 5;

In describing the present invention, if it is determined that a detailed description of a related known technology or configuration may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted. In addition, terms to be described later are terms defined in consideration of functions in the present invention, and may vary according to a user's intention or custom. Therefore, the definition should be made based on the contents throughout this specification. In addition, 'including' a certain component means that other components may be further included, rather than excluding other components unless otherwise stated.

Referring to the block structure for an injection mold according to the present invention, referring to FIGS. 1 to 4, in the block structure for an injection mold composed of an upper mold block 10 and a lower mold block 20: the upper mold of the block structure for the injection mold The block 10 includes a coupling groove 100 formed concave upward so that the slide core 200 is coupled to one side of the upper mold block 10; The left and right sides of the coupling groove 100 are in close contact with the inner wall facing each other, and the concave step formed higher than the height of the central portion in the withdrawal direction of the slide core 200 on both left and right sides of the upper surface of the coupling groove 100 Guide rails 300 each coupled to the groove 101 as fastening members; The lower part is opened on both left and right sides of the coupling groove 100, and the coupling groove 100 is formed concave upward at the boundary of the stepped groove 101 on the upper surface in the withdrawal direction of the slide core 200, respectively. groove 150; A support member having a rectangular cross-section that is seated in the fitting groove 150 and fixed with a fastening member, and supports one side surface of the guide rail 300 and the upper surface side end side of the slide core 200 in surface contact. (400) and; a supporting block 600 coupled to protrude downward from the middle portion of the coupling groove 100; An accommodation groove 210 concavely formed on the upper surface of the slide core 200 and coupled to the support block 600 in a concave-convex shape; and a locking piece 500 coupled to the side surface of the upper mold block 10 to prevent the slide core 200 from moving in the lateral direction.

Referring to FIGS. 1 and 2 , a concave groove 15 is formed at the center of the upper and lower mold blocks 10 and 20 to form a cavity during molding.

2 and 4, the upper mold block 10 has a coupling groove 100 formed on one side edge so that the slide core 200 is seated, and on both left and right sides of the coupling groove 100 It has a structure in which the fitting grooves 150 are formed concave upward at the connection boundary between the stepped grooves 101 on the upper surface of the coupling grooves 100 spaced apart from both inner walls formed to face each other.

As shown in FIG. 4, the fitting groove 150 is concave upward from the boundary of the step groove 101 of the coupling groove 100 in the pull-out direction of the slide core 200. Each is formed in the shape of a rectangular cross-section groove with a lower portion opened to correspond to the support member 400.

In addition, as shown in FIG. 4, the fitting groove 150 has a structure in which the depth h2 of one side to which the guide rail 300 is fitted and seated is smaller than the depth h1 of the other side. h1>h2)

As a result, the lower side of the side of the support member 400 coupled to be seated in the fitting groove 150 may be in surface contact to support the upper portion of the guide rail 300 .

Guide rails 300 are provided so as to be closely coupled to both inner walls of the coupling groove 100 to guide the left and right side surfaces of the slide core 200, and the guide rail 300 is coupled to the coupling groove 100 Both left and right sides of the upper surface are coupled so as to be fixed with the upper surface of the concave stepped groove 101 formed in the withdrawal direction of the slide core 200 higher than the height of the central part and the fastening member.

As shown in FIG. 4, the guide rail 300 has a structure in which the upper part is in surface contact so as to interfere with the side surface of the support member 400, and the lower part is in surface contact with both side surfaces of the slide core 200. , It has a structure in which the stepped portion 305 is formed so that the width W3 of the lower portion of the stepped portion 350 that does not interfere with the support member 400 is formed to be larger than the upper width W4.

Due to this, the upper part of the guide rail 300 is in close contact with the side surface of the support member 400, and the lower part facing each other makes surface contact with the left and right side surfaces of the slide core 200, and the stepped portion 305 is coupled so as to interfere with the fixing jaws 205 formed on both side edges of the slide core 200 and is coupled to prevent downward departure.

4, the guide rail ( 300) has a structure of a rectangular cross-sectional shape in which surface contact is made so as to support one side surface and the upper surface side end side of the slide core 200.

Accordingly, the lower part of the support member 400 is accommodated in the fitting grooves 150 on both sides of the left and right sides, and the lower part protrudes to the lower side of the fitting groove 150 and interferes with the guide rail 300. It serves to support the 300 to prevent lateral movement.

In addition, the fitting groove 150 has an advantage of securing a space in which a tool for processing the slide core 200 can work on the lower side of the slide core 200.

To this end, the guide rail 300, in which the width W3 of the lower part is wider than the width W4 of the upper part, supports the edge portions on both sides of the slide core 200, and the support member coupled to the fitting groove 150 ( 400) supports the upper side surface of the guide rail 300 so as to be in surface contact.

In addition, the present invention is formed concavely on one surface (upper surface) of the support block 600 coupled so as to protrude downward at the middle portion of the coupling groove 100, and the slide core 200, the support block 600 ) is further provided with a receiving groove 210 coupled in a concave-convex shape.

Accordingly, as the supporting block 600 is accommodated in the receiving groove 210, the lateral movement of the slide core 200 is restricted, thereby improving processing precision during tool processing.

Reference numeral 500 denotes a locking piece 500 that is coupled to the side surface of the upper mold block 10 where the coupling groove 100 is formed to prevent the slide core 200 from escaping in the lateral direction. It shows the inclined pin 250 coupled to the slide core 200.

In the present invention having such a configuration, after the guide rail 300 is brought into close contact with the left and right inner walls of the coupling groove 100, the support member is coupled into the fitting groove 150 formed on the upper surface of the coupling groove 100. After supporting the upper part of the guide rail 300 using 400, the slide core 200 is entered between the guide rails 300 on both sides, and then the guide rail 300 and the support member 400 are fastened together. fix it

After that, since the upper part of the guide rail 300 is guided by the support member 400 and maintained in close contact with the inner walls of the left and right sides, the left and right sides of the coupling groove 100 are more dense than the central part. In-position assembly work by means of a fastening member in the concave stepped groove 101 formed high is easily performed.

In addition, the overall width of the coupling groove portion 100 in which the fitting groove 150 is formed increases, thereby widening the entry width of the tool during processing of the slide core 200 seated in the coupling groove portion 100, thereby increasing the slide core 200. It has the advantage of improving the processability for the edge portion of the.

In addition, since the fitting groove 150 is formed small so that one side depth h2 close to the guide rail 300 is located at a height higher than the other side depth h1, the support member 400 Supporting and assembling work of the guide rail 300 for the guide rail 300 can be performed easily.

Therefore, in one embodiment of the present invention, fitting grooves 150 are formed on the left and right upper surfaces of the coupling groove portion 100 to which the slide core 200 is coupled, and the support coupled so as to be seated in the fitting groove 150 The member 400 supports the upper side of the guide rail 300, and the lower part of the guide rail 300 contacts and supports both side surfaces of the slide core 200, and the stepped portion of the guide rail 300 305 is arranged so as to interfere with the fixing jaw 205 side of the slide core 200, and has an advantage of supporting the slide core 200 to prevent downward movement while preventing downward movement.

In addition, since the locking piece 500 is coupled to the center of the coupling groove 100, it has an advantage of preventing the slide core 200 from lateral direction deviation.

5 and 6 are views showing a modified embodiment of the fitting groove 150 and the support member 400 of the present invention, the fitting groove 150 is formed in a tapered structure in which the width becomes narrower from the outside to the inside , It is formed in a tapered structure such that the inner and outer width thicknesses (W1, W2) of the support member 400 correspond to the fitting groove 150.

Since the fitting groove 150 and the support member 400 have a variable structure such that the outer and inner widths W1 and W2 are tapered, when the support member 400 is slidably engaged, the wedge-shaped support member 400 By supporting the guide rail 300 in close contact with both inner walls of the coupling groove 100, assembling the guide rail 300 in place is guided and the guide rail 300 and the slide core 200 are assembled. will perform the function of guiding.

Accordingly, in another embodiment of the present invention, as the wedge-shaped support member 400 is coupled in a sliding manner in the fitting groove 150, the guide rail 300 is assembled in place, and the guide rail 300 and It has a useful advantage that can increase the assembly convenience of the slide core 200.

In this way, although specific embodiments have been described in the detailed description of the present invention, various modifications are possible without departing from the scope of the present invention. Therefore, the scope of the present invention should not be limited to the embodiments described above and should not be limited, but should be defined by not only the claims to be described later, but also those equivalent to these claims.

That is, the present invention described as above is not limited to the specific preferred embodiments described above, and anyone having ordinary knowledge in the technical field to which the present invention belongs without departing from the gist of the present invention claimed in the claims Of course, various modifications are possible, and such changes are within the scope of the claims.

10,20: Upper and lower mold blocks 15: Groove
100: coupling groove 110: fixing groove
150: fitting groove 200: slide core
205: fixed jaw 210: receiving groove
250: inclined pin 300: guide rail
305: stepped portion 400: support member
500: hooking piece 600: support block

Claims (4)

In the block structure for an injection mold consisting of an upper mold block 10 and a lower mold block 20:
The upper mold block 10 of the block structure for the injection mold,
a coupling groove 100 formed concave upward so that the slide core 200 is coupled to one side of the upper mold block 10;
The left and right sides of the coupling groove 100 are in close contact with the inner wall facing each other, and the concave step formed higher than the height of the central portion in the withdrawal direction of the slide core 200 on both left and right sides of the upper surface of the coupling groove 100 Guide rails 300 each coupled to the groove 101 as fastening members;
The lower part is opened on both left and right sides of the coupling groove 100, and the coupling groove 100 is formed concave upward at the boundary of the stepped groove 101 on the upper surface in the withdrawal direction of the slide core 200, respectively. groove 150;
A support member having a rectangular cross-section that is seated in the fitting groove 150 and fixed with a fastening member, and supports one side surface of the guide rail 300 and the upper surface side end side of the slide core 200 in surface contact. (400) and;
a supporting block 600 coupled to protrude downward from the middle portion of the coupling groove 100;
An accommodation groove 210 concavely formed on the upper surface of the slide core 200 and coupled to the support block 600 in a concave-convex shape; and
A locking piece 500 coupled to the side surface of the upper mold block 10 to prevent the slide core 200 from escaping in the lateral direction; is provided,
Each of the guide rails 300 has an upper part in close contact with the side surface of the support member 400 to prevent the slide core 200 from moving downward, and a lower part of the guide rail 300 in close contact with the side surface of the slide core 200. The width W3 of the lower portion of the stepped portion 305 is in contact with the support member 400 so that the stepped portion 305 is coupled to interfere with the fixed jaw 205 formed on the rim of the slide core 200. It is formed larger than the upper width W4,
The fitting groove 150 is formed in the form of a rectangular cross-section groove, and the guide rail 300 is fitted into one side depth (h2) is formed smaller than the other side depth (h1) Block structure for injection mold, characterized in that. delete delete The method of claim 1,
The fitting groove 150 is formed in a tapered structure in which the width becomes narrower from the outside to the inside, and the inner and outer width thicknesses W1 and W2 of the support member 400 correspond to the fitting groove 150 A block structure for an injection mold, characterized in that it is formed in a tapered structure.

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