CN217258143U - Injection mold with front mold first-pulling mechanism - Google Patents

Injection mold with front mold first-pulling mechanism Download PDF

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Publication number
CN217258143U
CN217258143U CN202220093806.XU CN202220093806U CN217258143U CN 217258143 U CN217258143 U CN 217258143U CN 202220093806 U CN202220093806 U CN 202220093806U CN 217258143 U CN217258143 U CN 217258143U
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mold
plate
core
insert
limiting
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CN202220093806.XU
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Chinese (zh)
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林碧山
庄惠凤
吴敬泽
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Xiamen Surini Precision Mould Co ltd
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Xiamen Surini Precision Mould Co ltd
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Abstract

The utility model relates to a front mould first-drawing mechanism injection mould, which comprises a nylon drag hook and a first delay limiting part in a first direction; the front mold assembly comprises a first front mold plate, a second front mold plate and a third front mold plate, and the front mold assembly is provided with a glue inlet runner; the mold core component comprises a front mold core plate connected with the third front mold plate, a rear mold core plate connected with the rear mold component and a core-pulling insert movably arranged on the front mold core plate in a penetrating way; the first connecting part of the nylon draw hook is connected with the first front template, and the second connecting part of the nylon draw hook is connected with the core-pulling insert; the first time delay limiting part is arranged between the front mold core plate and the core-pulling insert. The technical scheme realizes sectional die sinking, avoids the bonding of products and the die core, and is convenient for cleaning the glue inlet flow channel.

Description

Injection mold with front mold first-pulling mechanism
Technical Field
The utility model relates to an injection mold technical field especially relates to a mechanism injection mold is taken out earlier to front mould.
Background
An injection mold is a tool for producing plastic products and also a tool for giving the plastic products complete structure and precise dimensions. Injection molding by means of an injection mold is a processing method used in mass production of some parts having complicated shapes. The method comprises the specific steps of injecting heated and melted plastic into a mold cavity from an injection molding machine at high pressure, and cooling and solidifying to obtain a formed product.
The existing injection molding products are rich and various, the structures of the existing injection molding products are more complex, and the surfaces of part of the injection molding products are provided with concave cavities, patterns, convex blocks and the like, so that the inner side surfaces of the mold cores are also provided with corresponding convex structures. Due to the complex surface of the injection product, the contact area between the injection product and the mold core is large, and the front mold is easy to bond during demolding, so that the demolding is abnormal, and the quality of the product is influenced. Therefore, how to avoid the adhesion of the mold of the product with a complex surface during demolding is a problem to be solved.
SUMMERY OF THE UTILITY MODEL
In view of the above, it is desirable to provide a front mold first-drawing mechanism injection mold.
An injection mold with a front mold first-pulling mechanism comprises a front mold assembly, a mold core assembly and a rear mold assembly, wherein the mold core assembly is arranged between the front mold assembly and the rear mold assembly, the moving direction of a movable mold for demolding or closing is defined as a first direction, and the injection mold further comprises a nylon drag hook and a first delay limiting part in the first direction; the front mold assembly comprises a first front mold plate, a second front mold plate and a third front mold plate, and the front mold assembly is provided with a glue inlet flow channel; the mold core assembly comprises a front mold core plate connected with the third front mold plate, a rear mold core plate connected with the rear mold assembly and a core-pulling insert movably arranged on the front mold core plate in a penetrating manner; the first connecting part of the nylon draw hook is connected with the first front template, and the second connecting part of the nylon draw hook is connected with the core-pulling insert; the first time delay limiting part is arranged between the front mold core plate and the core-pulling insert.
The core-pulling insert comprises an insert and an insert fixing plate, and the insert is movably arranged on the front mold core plate in a penetrating manner and forms an injection molding cavity together with the front mold core plate and the rear mold core plate in a surrounding manner; the insert fixing plate is fixedly connected with the insert, and the second connecting part of the nylon draw hook is fixedly connected to the insert fixing plate.
Furthermore, a second delay limiting part is further arranged, a limiting protrusion is arranged at the first end of the second delay limiting part, and a step-shaped shaft sleeve is fixedly sleeved at the second end of the second delay limiting part; a first limiting step hole matched with the limiting bulge is formed in the third front template; a second limiting step hole matched with the step-shaped shaft sleeve is formed in the first front template, and the step-shaped shaft sleeve is abutted to the second front template;
after the second front template is separated from the core-pulling insert by a preset distance, the limiting bulge is abutted against the first limiting stepped hole to separate the first front template from the second front template; and after the first front template and the second front template are separated by a preset distance, the step-shaped shaft sleeve is abutted against the second limiting step hole so as to limit the first front template.
Further, the first delay limiting part is a step-shaped limiting rod.
Furthermore, the rear die assembly comprises a base, a rear die plate fixedly arranged on the base and an ejector plate which can be arranged between the base and the rear die plate in a front-and-back movement manner, and the ejector plate is connected with an ejector pin; the ejector pin penetrates through the rear mold assembly and the rear mold core plate to enter the injection molding cavity so as to eject an injection molding product during demolding.
Furthermore, an elastic piece for buffering the displacement of the ejector pin plate and a limiting block for limiting the displacement of the ejector pin plate are arranged between the rear template and the base.
Furthermore, one side of the core-pulling insert forming the injection molding cavity is provided with a bulge part so as to form an injection molding product with a concave cavity on the surface.
The utility model discloses, its front mould subassembly includes template before first front mould board and the second, and two connecting blocks of nylon drag hook are connected with first front mould board and the mold insert of loosing core respectively. During demolding, the rear mold assembly moves backwards, the core-pulling insert is separated from the injection product, and the second front mold plate is separated from the third front mold plate; after moving a certain distance, the core-pulling insert is limited by the first delay limiting part, the back mold assembly continues to move backwards, the first connecting part and the second connecting part of the nylon draw hook are separated, and then the first front mold plate and the second front mold plate are integrally separated from the core-pulling insert. According to the technical scheme, the sectional die sinking is realized, the core-pulling insert is separated from the product, and then the die core is completely separated from the product, so that the product is prevented from being bonded with the die core. And the glue inlet runner on the front mold assembly is also convenient to clean.
Drawings
Fig. 1 is an overall schematic view of an embodiment of an injection mold of a front mold first-drawing mechanism of the present invention;
FIG. 2 is a top view of one embodiment of an injection mold of the front mold first-draw mechanism shown in FIG. 1;
FIG. 3 is a schematic sectional view of the injection mold of the front mold first-pulling mechanism in FIG. 2 in the direction A-A;
FIG. 4 is a schematic structural view of the injection mold with the front mold first-drawing mechanism of the present invention after the front mold assembly is hidden;
FIG. 5 is a front view of an embodiment of the front mold first-extraction mechanism injection mold shown in FIG. 1, after concealing a portion of the cover plate;
FIG. 6 is a schematic structural view of the nylon retractor portion of the injection mold for staged demolding according to the present invention;
fig. 7 is a schematic structural view of a front core plate and a core-pulling insert of the injection mold with staged demolding according to the present invention;
FIG. 8 is a schematic cross-sectional view taken along line B-B of FIG. 7;
FIG. 9 is a schematic cross-sectional view of the injection mold of the center front mold first-draw mechanism of FIG. 2 in the direction C-C;
fig. 10 is a partially enlarged view of fig. 9 at D.
In the drawings, the components represented by the respective reference numerals are listed below:
1. a nylon draw hook; 11. a first connection portion; 12. a second connecting portion; 21. a first front template; 22. a second front template; 23. a third front template; 31. a base; 32. a rear template; 33. an ejector plate; 34. a thimble; 35. an elastic member; 36. a limiting block; 4. a mold core assembly; 41. a front mold core plate; 42. a rear core plate; 43. an insert; 44. an insert fixing plate; 5. a first delay limiting part; 6. a second delay limiting member; 61. step-shaped shaft sleeve.
Detailed Description
In order to make the above objects, features and advantages of the present invention more comprehensible, embodiments of the present invention are described in detail below with reference to the accompanying drawings. It is apparent that the specific details set forth in the following description are merely exemplary of the invention, which can be practiced in many other embodiments that depart from the specific details disclosed herein. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work all belong to the protection scope of the present invention.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.
In an embodiment, referring to fig. 1 to 6, an injection mold with a front mold first-drawing mechanism includes a front mold assembly, a mold core assembly and a rear mold assembly, wherein the mold core assembly is disposed between the front mold assembly and the rear mold assembly, and a moving direction of the rear mold assembly for demolding or mold assembly is defined as a first direction; the nylon retractor also comprises a nylon retractor 1 and a first delay limiting part 5 in the first direction; the front mold assembly comprises a first front mold plate 21, a second front mold plate 22 and a third front mold plate 23, and the front mold assembly is provided with a glue inlet flow channel; the mold core assembly comprises a front mold core plate 41 connected with the third front mold plate 23, a rear mold core plate 42 connected with the rear mold assembly and a core pulling insert movably arranged on the front mold core plate 41 in a penetrating way; the first connecting part 11 of the nylon draw hook 1 is connected with the first front template 21, and the second connecting part 12 of the nylon draw hook 1 is connected with the core-pulling insert; the first delay limiting member 5 is disposed between the front core plate 41 and the core-pulling insert. During demolding, after the rear mold assembly moves backwards for a preset distance, the core-pulling insert is limited by the first delay limiting part 5, the first connecting part 11 is separated from the second connecting part 12, the core-pulling insert is separated from the second front mold 22, and at this time, the first front mold plate 21 and the second front mold plate 22 are connected together.
In this embodiment, when the mold is opened, the rear mold assembly moves backward as a movable mold to realize the subsequent limiting and separating actions.
The utility model discloses, two connecting blocks of nylon drag hook 1 are connected with first front template 21 and the mold insert of loosing core respectively. During demolding, the rear mold assembly moves backwards, the core-pulling insert is separated from the injection molding product, and the second front mold plate 22 is separated from the third front mold plate 23; after moving a certain distance, the core-pulling insert is limited by the first delay limiting part 5, the rear mold assembly continues to move backwards, the first connecting part 11 is separated from the second connecting part 12, and the core-pulling insert is separated from the first front mold plate and the second front mold plate. According to the technical scheme, the sectional die sinking is realized, the core-pulling insert is separated from the product, and then the die core is completely separated from the product, so that the product is prevented from being bonded with the die core. And the glue inlet runner on the front mold assembly is also convenient to clean.
It can be understood that the second connecting portion 12 is in interference sleeve connection with the first connecting portion 11, and when the core pulling insert is limited by the first delay limiting member 5, the second connecting portion 12 of the nylon wire retractor 1 is disengaged from the first connecting portion 11. In the application document, the nylon retractor 1 in the prior art is divided into two parts, namely the second connecting part 12 and the first connecting part 11 which are sleeved together in an interference manner.
On the basis of this embodiment, the mold core assembly 4 includes a front mold core plate 41, a rear mold core plate 42, and at least one core insert, the core insert is embedded in the front mold core plate 41, and the front mold core plate 41, the rear mold core plate 42, and the core insert surround together to form an injection molding cavity.
It can be understood that through embedded setting, can reduce the gap of junction, reduce injection moulding product's deckle edge, promote product quality. Of course, the core inserts may be disposed between the front core plate 41 and the rear core plate 42, and the structure thereof is not limited to the description in the embodiment.
Specifically, the core-pulling insert comprises an insert 43 and an insert fixing plate 44, wherein the insert 43 is movably arranged on the front mold core plate 41 in a penetrating manner and surrounds the front mold core plate 41 and the rear mold core plate 42 together to form an injection molding cavity; the insert fixing plate 44 is fixedly connected to the insert 43, the first front mold plate 21, and the second connecting portion 12, respectively. Of course, the insert fixing plate 44 may be in other transmission connection with the insert 43, the first front mold plate 21 and the second connecting portion 12, and the fixed connection described in the embodiment is not limited thereto.
Referring to fig. 4, 9 and 10, on the basis of the present embodiment, a second delay limiting member 6 is further provided, a limiting protrusion is provided at a first end of the second delay limiting member 6, and a second end of the second delay limiting member is fixedly sleeved with a step-shaped shaft sleeve 61; a first limiting step hole matched with the limiting bulge is formed in the third front template 23; a second limiting step hole matched with the step-shaped shaft sleeve 61 is formed in the first front template 21, and the step-shaped shaft sleeve 61 is abutted against the second front template 22;
after the second front template 22 is separated from the core-pulling insert by a preset distance, the limiting bulge is abutted against the first limiting step hole so as to separate the first front template 21 from the second front template 22; after the first front mold plate 21 and the second front mold plate 22 are separated by a preset distance, the stepped shaft sleeve 61 is abutted to the second limiting stepped hole to limit the first front mold plate 21.
It should be noted that, when the core-pulling insert is separated from the first and second front mold plates, the first and second front mold plates are still connected together, and since the length of the second delay limiting part 6 is much longer than that of the first delay limiting part, the action stroke of the second delay limiting part 6 is not yet finished. It will be appreciated that the second front mold plate 22 is not associated with the core insert, and the disengagement of the first front mold 21 from the second front mold plate 22 is effected by the second extension limiter 6.
Specifically, the first delay limiting part 5 and the second delay limiting part 6 are both step-shaped limiting rods. The limiting rod can play a role in guiding and limiting. Of course, the limiting member may have other limiting structures.
On the basis of the embodiment, further, the rear mold assembly includes a base 31, a rear mold plate 32 fixedly disposed on the base 31, and an ejector plate 33 movably disposed between the base 31 and the rear mold plate 32 in a front-and-back manner, the ejector plate 33 is connected with an ejector pin 34; ejector pins 34 extend through the rear mold assembly and rear core plate 42 into the injection mold cavity to eject the injection molded product during demolding. Further, an elastic member 35 for buffering the displacement of the ejector plate 33 and a stopper 36 for limiting the displacement of the ejector plate 33 are provided between the rear mold plate 32 and the base 31.
It can be understood that, during demolding, the ejector pin plate 33 is moved to drive the ejector pins 34 to eject the injection-molded product, and the limiting process is performed by the limiting blocks 36. After demolding, the elastic member 35 rebounds to drive the ejector plate 33 and the ejector pin 34 to reset.
Specifically, the surface of the core-pulling insert forming the injection molding cavity is provided with a bulge so as to form an injection molding product with a concave cavity on the surface. Of course, the core back insert may have other structures such as a smooth surface and a concave surface, which are not described as limitations in this embodiment.
The utility model discloses technical scheme, the drawing of patterns of sectional type can avoid the mould bonding to lead to the drawing of patterns unusual, and in the time of separately between template 22 and the third front template 23 before the second, the mold insert of loosing core breaks away from with first front template 21, and the mold insert of loosing core is accomplishing the back of loosing core, still stays inside template 23 before the third, can play like this and both accomplish to loose core, guarantees again that the cold burden that flows can be demoulded smoothly, can promote product quality for mould efficiency.
The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above embodiments only represent several embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several changes, substitutions and improvements can be made, and all of them should be covered by the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the claims.

Claims (7)

1. The utility model provides a mechanism injection mold is taken out earlier to front mould, includes front mould subassembly, mold core assembly and back mold assembly, mold core assembly sets up in the front between mold assembly and the back mold assembly, and the direction definition that the movable mould drawing of patterns or compound die removed is first direction, its characterized in that:
the device also comprises a nylon drag hook and a first delay limiting part in the first direction; the front mold assembly comprises a first front mold plate, a second front mold plate and a third front mold plate, and the front mold assembly is provided with a glue inlet flow channel; the mold core assembly comprises a front mold core plate connected with the third front mold plate, a rear mold core plate connected with the rear mold assembly and a core-pulling insert movably arranged on the front mold core plate in a penetrating manner; the first connecting part of the nylon draw hook is connected with the first front template, and the second connecting part of the nylon draw hook is connected with the core-pulling insert; the first time delay limiting part is arranged between the front mold core plate and the core-pulling insert.
2. The front mold first-pulling mechanism injection mold according to claim 1, wherein the core-pulling insert comprises an insert and an insert fixing plate, and the insert is movably arranged on a front mold core plate and forms an injection molding cavity together with the front mold core plate and the rear mold core plate in an enclosing manner; the insert fixing plate is fixedly connected with the insert, and the second connecting part of the nylon draw hook is fixedly connected to the insert fixing plate.
3. The injection mold with a front mold first-pulling mechanism according to claim 2, further comprising a second delay limiting member, wherein a first end of the second delay limiting member is provided with a limiting protrusion, and a second end of the second delay limiting member is fixedly sleeved with a stepped shaft sleeve; a first limiting step hole matched with the limiting bulge is formed in the third front template; a second limiting step hole matched with the step-shaped shaft sleeve is formed in the first front template, and the step-shaped shaft sleeve is abutted to the second front template;
after the second front template is separated from the core-pulling insert by a preset distance, the limiting bulge is abutted against the first limiting step hole so as to separate the first front template from the second front template; and after the first front template and the second front template are separated by a preset distance, the step-shaped shaft sleeve is abutted against the second limiting step hole so as to limit the first front template.
4. The injection mold with front mold first-pulling mechanism as claimed in claim 1, wherein the first delay limiting member is a stepped limiting rod.
5. The injection mold with the front mold first-pulling mechanism as recited in claim 1, wherein the rear mold assembly comprises a base, a rear mold plate fixedly arranged on the base, and an ejector plate arranged between the base and the rear mold plate in a manner of moving back and forth, the ejector plate being connected with an ejector pin; the ejector pin penetrates through the rear mold assembly and the rear mold core plate to enter the injection molding cavity so as to eject an injection molding product during demolding.
6. The injection mold with the front mold first-pulling mechanism according to claim 5, wherein an elastic member for buffering the displacement of the ejector plate and a limiting block for limiting the displacement of the ejector plate are arranged between the rear mold plate and the base.
7. The front mold pull-first mechanism injection mold according to claim 1, wherein the surface of the core-pulling insert forming the injection molding cavity is provided with a bulge to form an injection molding product with a concave cavity on the surface.
CN202220093806.XU 2022-01-14 2022-01-14 Injection mold with front mold first-pulling mechanism Active CN217258143U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202220093806.XU CN217258143U (en) 2022-01-14 2022-01-14 Injection mold with front mold first-pulling mechanism

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202220093806.XU CN217258143U (en) 2022-01-14 2022-01-14 Injection mold with front mold first-pulling mechanism

Publications (1)

Publication Number Publication Date
CN217258143U true CN217258143U (en) 2022-08-23

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Application Number Title Priority Date Filing Date
CN202220093806.XU Active CN217258143U (en) 2022-01-14 2022-01-14 Injection mold with front mold first-pulling mechanism

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CN (1) CN217258143U (en)

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