CN112936766A

CN112936766A - Core-pulling mechanism beneficial to demoulding of plastic part

Info

Publication number: CN112936766A
Application number: CN202110361815.2A
Authority: CN
Inventors: 杨育松; 傅良红; 罗霄
Original assignee: Chongqing Shuangma Technology Co ltd
Current assignee: Chongqing Shuangma Technology Co ltd
Priority date: 2021-04-02
Filing date: 2021-04-02
Publication date: 2021-06-11
Anticipated expiration: 2041-04-02
Also published as: CN112936766B

Abstract

The invention discloses a core pulling mechanism beneficial to demoulding of plastic parts, which comprises a core body used for being in sliding connection with a mould, wherein the edge of one end of the core body is movably provided with a demoulding part, the demoulding part is provided with a demoulding-assisting block positioned on the outer side of the core body and a guide block positioned on the lower side of the core body, a gap is formed between the demoulding-assisting block and the outer side of the core body and used for product moulding, the lower side of the core body is provided with a guide groove corresponding to the guide block, the guide block is provided with an upwards extending protruding part, and the protruding part is positioned in the guide groove and can slide relative to the. The invention has the beneficial effects that: the surface of the product can be separated from the cavity surface of the mold in the core pulling process, which is beneficial to ensuring the smooth demolding of the mold.

Description

Core-pulling mechanism beneficial to demoulding of plastic part

Technical Field

The invention belongs to the technical field of injection molds, and particularly relates to a core-pulling mechanism beneficial to demolding of plastic parts.

Background

The outer shell of the automobile central console is mainly made of plastic materials and is mainly formed by an injection molding process. In order to meet the requirement of diversified functions of the automobile console, the general design of the modeling of the console shell is complex, and therefore, the core-pulling mechanism is required to be arranged in the mold when the console shell is molded by utilizing the mold.

After the central console shell is subjected to pressure maintaining and shaping in the mold cavity, after the existing core pulling mechanism is moved away, although the product can be separated from the mold cavity along the demolding direction, the surface of the product in contact with the mold cavity still has a proper amount of resistance, so that the demolding force is increased and even the demolding is difficult.

Disclosure of Invention

In view of this, the invention provides a core pulling mechanism which is beneficial to demolding of plastic parts, and the surface of a product can be separated from the cavity surface of a mold in the core pulling process, so that smooth demolding of the mold is guaranteed.

In order to achieve the purpose, the technical scheme of the invention is as follows:

a core-pulling mechanism for facilitating the release of a plastic part from a mold, comprising a core body for sliding engagement with the mold, characterized by: the activity of core one end edge is provided with drawing of patterns part, drawing of patterns part has the guide block that helps to take off the piece and be located the core downside that is located the core outside, wherein, help to take off and have the clearance between piece and the core outside for the product shaping, the position that the core downside corresponds the guide block is equipped with the guiding groove, be equipped with the bulge of upwards extending on the guide block, this bulge is located in the guiding groove and can slide for the guiding groove.

By adopting the structure, after the core body slides and moves a certain distance, the side wall of one side of the guide groove is contacted with the protruding part and drives the demoulding part to move, so that a product is driven to move, the surface of the product is separated from the cavity surface of the mould, and the mould can be smoothly demoulded.

Preferably, the method comprises the following steps: the core body is used for being connected with a die in a sliding mode, the guide block is assembled on the limiting seat in a sliding mode, the locking assembly is arranged between the guide block and the limiting seat and used for limiting the guide block to slide relative to the limiting seat, and the locking assembly can be triggered to be unlocked in the core body sliding core-pulling process. By adopting the structure, the assembly is facilitated, and the demoulding component can be automatically unlocked after the core body slides for a certain distance, so that the demoulding of the product is facilitated.

Preferably, the method comprises the following steps: the guide block is provided with a locking hole, the locking assembly comprises an unlocking pin and a locking pin, the locking pin is slidably supported on the limiting seat through a first spring, the locking pin can be embedded into the locking hole under the action of the first spring, the unlocking pin is slidably mounted in the locking hole through a second spring, the upper end of the unlocking pin penetrates out of the locking hole under the action of the second spring, and an unlocking part matched with the upper end of the unlocking pin is arranged on the lower side of the core body. By adopting the structure, in the core pulling movement process, the unlocking pin can be pressed downwards by the unlocking part, so that the locking pin leaves the locking hole, and the automatic unlocking of the demoulding component is realized.

Preferably, the method comprises the following steps: the protrusion is formed at the front end of the guide block, and the upper end of the unlocking pin is located between the unlocking part and the protrusion when the locking assembly is in a locking state. By adopting the structure, in the core body core pulling movement process, the unlocking part can be ensured to unlock the demoulding part firstly, and then the demoulding part is driven to move to realize auxiliary demoulding.

Preferably, the method comprises the following steps: the core body is characterized in that a shaping part is arranged in the core body in a sliding mode, a shaping part is arranged at the upper end of the shaping part, a guide sliding groove is obliquely arranged at the lower end of the shaping part, the shaping part exceeds the upper end of the core body in a non-core-pulling state, a linkage part is arranged in the guide block in a sliding mode, a wedge sliding block in sliding connection with the guide sliding groove is arranged at the rear end of the linkage part, a boss right opposite to the unlocking part is arranged at the front end of the linkage part, and the unlocking part can drive the shaping part to slide into the core body in a sliding mode through. By adopting the structure, the shaping part can meet the requirement of product shaping, the core body slides and pulls the core in-process, the unlocking part drives the linkage part to move through the boss, the linkage part drives the shaping part to move downwards through the cooperation of the wedge slide block and the guide chute, so that the shaping part is separated from the product, the demoulding is facilitated, and the product is prevented from being damaged when the demoulding part moves.

Compared with the prior art, the invention has the beneficial effects that:

by adopting the core pulling mechanism which is beneficial to demoulding of the plastic part, the surface of a product can be separated from the cavity surface of the mould in the core pulling process, and the smooth demoulding of the mould is favorably ensured.

Drawings

FIG. 1 is a schematic structural view of a core-pulling mechanism;

FIG. 2 is an exploded view of the stripper member, the retainer, the locking assembly, the shaping member and the linkage member;

FIG. 3 is a partial cross-sectional view of the core-pulling mechanism at the stripper part position (cut through the locking assembly);

figure 4 is a partial cross-sectional view of the core-pulling mechanism at the position of the stripping member (the cut plane passes through the styling member and the interlocking member).

Detailed Description

The present invention will be further described with reference to the following examples and the accompanying drawings.

As shown in fig. 1 to 3, a core-pulling mechanism for facilitating the release of a plastic part involves the following main components: the core body 1, the demoulding part 2, the limiting seat 3, the locking assembly 4, the shaping part 5 and the linkage part 6.

The following description of the orientation "up, down, left, right" is made with reference to fig. 3 and 4.

After the core pulling mechanism is applied to an injection mold, a core body 1 is in sliding connection with the mold, a limiting seat 3 is fixedly connected with the mold, a demolding part 2 is located at the edge position of the lower left side of the core body 1, the demolding part 2 comprises an integrally formed demolding assisting block 2a and a guide block 2b, the demolding assisting block 2a and the guide block 2b are perpendicular to each other, the demolding assisting block 2a is arranged on the left side of the core body 1 along the vertical direction, a gap r is formed between the demolding assisting block 2a and the left side of the core body 1, the guide block 2b is located on the lower side of the core body 1, the guide block 2b is assembled on the limiting seat 3 in a sliding mode, a guide groove 1a is formed in the lower side of the core body 1, a unlocking portion 1b is arranged on the left side of the guide groove 1a, an upward extending protruding portion 2c is arranged at the front end of.

As shown in fig. 4, after the plastic part 7 is pressure-maintaining molded in the mold cavity, the part of the plastic part 7 is located in the gap r, in order to facilitate demolding of the plastic part 7, the core body 1 needs to slide rightwards to complete core pulling, after the core body 1 slides rightwards for a certain distance, the unlocking part 1b contacts with the convex part 2c and drives the demolding part 2 to slide rightwards, the demolding assisting block 2a of the demolding part 2 pushes the plastic part 7 rightwards, so that the surface of the plastic part 7 is separated from the surface of the mold cavity, the resistance of the plastic part 7 in vertical upward demolding is smaller, and smooth demolding of the mold is favorably ensured.

As shown in fig. 3 again, in order to prevent the movement of the ejector 2 and ensure the stable dimension of the gap r during the injection molding process, a locking assembly 4 is disposed between the guide block 2b and the limit seat 3, a locking hole 2d is disposed on the guide block 2b, and the locking assembly 4 includes an unlocking pin 4a and a locking pin 4b, wherein the locking pin 4b is slidably supported on the limit seat 3 by a first spring 4c, and during the injection molding process, the first spring 4c provides an upward pushing force to make the locking pin 4b be inserted into the locking hole 2d, and at this time, the ejector 2 is locked. The unlocking pin 4a is installed in the locking hole 2d in a vertically sliding mode through the second spring 4d, the second spring 4d provides upward thrust to enable the upper end of the unlocking pin 4a to penetrate out of the locking hole 2d, the upper end of the unlocking pin 4a is provided with a guide inclined surface 4a1, in the process of rightward core pulling sliding of the core body 1, the unlocking part 1b firstly touches the guide inclined surface 4a1 to enable the unlocking pin 4a to slide downwards, the lower end of the unlocking pin 4a presses the locking pin 4b and enables the locking pin 4b to leave the locking hole 2d, unlocking of the demolding part 2 is achieved, then the core body 1 continues to move rightwards, and the unlocking part 1b is contacted with the protruding portion 2c to drive the demolding part 2 to move.

In order to meet the structural design requirement of a product, the upper end of the stripping-assisting block 2a is provided with a shaping part 5a, and in the injection molding process of the mold, the shaping part 5a can enable the plastic part 7 to be molded into a structure 7a in the mold. With this structure, if the knock out member 2 moves rightward during the slide core pulling of the core 1, the structure 7a may be damaged. The present embodiment has the form member 5 and the interlocking member 6 mounted within the stripper member 2 to ensure that the form portion 5a is separated from the structure 7a during stripping.

As shown in fig. 2 and 4, a first sliding groove 2a1 is arranged in the release assisting block 2a, a second sliding groove 2b1 is arranged in the guide block 2b, the shaping component 5 is slidably assembled in the first sliding groove 2a1, the shaping part 5a is arranged at the upper end of the shaping component 5, a guide sliding groove 5b is obliquely arranged at the lower end of the shaping component 5, the linkage component 6 is slidably assembled in the second sliding groove 2b1, a wedge sliding block 6a which is slidably connected with the guide sliding groove 5b is arranged at the left end of the linkage component 6, and a boss 6b which is opposite to the unlocking part 1b is arranged at the right end of the linkage component 6. In the sliding core-pulling process of the core body 1, the unlocking part 1b drives the linkage part 6 to move through the boss 6b, the linkage part 6 drives the shaping part 5 to move downwards through the matching action of the wedge slide block 6a and the guide slide groove 5b, so that the shaping part 5a is separated from the structure 7a, the demoulding is facilitated, and the structure 7a is prevented from being damaged when the demoulding part 2 moves.

Finally, it should be noted that the above-mentioned description is only a preferred embodiment of the present invention, and those skilled in the art can make various similar representations without departing from the spirit and scope of the present invention.

Claims

1. A core-pulling mechanism for facilitating the demoulding of plastic parts, comprising a core body (1) for sliding connection with a mould, characterized in that: core (1) one end edge activity is provided with drawing of patterns part (2), drawing of patterns part (2) have the help that is located the core (1) outside take off piece (2a) and be located guide block (2b) of core (1) downside, wherein, help and take off and have clearance (r) between piece (2a) and the core (1) outside for the product shaping, the position that core (1) downside corresponds guide block (2b) is equipped with guide groove (1a), be equipped with bulge (2c) of upwards extending on guide block (2b), this bulge (2c) are located guide groove (1a) are interior and can slide for guide groove (1 a).

2. The core-pulling mechanism for facilitating demolding of a plastic part of claim 1, wherein: still including being used for with spacing seat (3) of mould fixed connection, guide block (2b) sliding assembly is equipped with locking Assembly (4) on spacing seat (3) between guide block (2b) and spacing seat (3) for limiting guide block (2b) and sliding spacing seat (3) relatively, core (1) slides and looses core the in-process and can trigger locking Assembly (4) unblock.

3. A core pulling mechanism for facilitating demolding of a plastic part as recited in claim 2, wherein: the guide block (2b) is provided with a locking hole (2d), the locking assembly (4) comprises an unlocking pin (4a) and a locking pin (4b), the locking pin (4b) is slidably supported on the limiting seat (3) through a first spring (4c), the locking pin (4b) can be embedded into the locking hole (2d) under the action of the first spring (4c), the unlocking pin (4a) is slidably mounted in the locking hole (2d) through a second spring (4d), the upper end of the unlocking pin (4a) penetrates out of the locking hole (2d) under the action of the second spring (4d), and an unlocking part (1b) matched with the upper end of the unlocking pin (4a) is arranged on the lower side of the core body (1).

4. A core pulling mechanism for facilitating demolding of a plastic part as recited in claim 3, wherein: the bulge (2c) is formed at the front end of the guide block (2b), and the upper end of the unlocking pin (4a) is positioned between the unlocking part (1b) and the bulge (2c) when the locking assembly (4) is in a locking state.

5. A core-pulling mechanism for facilitating demolding of a plastic part as claimed in claim 3 or claim 4, wherein: help taking off interior slidable mounting of piece (2a) and have design part (5), the upper end of design part (5) is equipped with design portion (5a), and the lower extreme slope is provided with direction spout (5b), and under the state of not loosing core, design portion (5a) surpass help the upper end of taking off piece (2a), slidable mounting has linkage part (6) in guide piece (2b), and the rear end of linkage part (6) is equipped with and leads spout (5b) sliding connection's slide wedge slider (6a), the front end be equipped with it just right boss (6b) to separate lock portion (1b), core (1) slip the in-process of loosing core, it can drive design portion (5a) through boss (6b) and slide into help taking off inside piece (2a) to separate lock portion (1 b).

6. The core-pulling mechanism for facilitating demolding of a plastic part of claim 5, wherein: the demoulding-assisting block (2a) and the guiding block (2b) are perpendicular to each other, a first sliding groove (2a1) in sliding fit with the shaping component (5) is arranged in the demoulding-assisting block (2a), and a second sliding groove (2b1) in sliding fit with the linkage component (6) is arranged in the guiding block (2 b).

7. A core pulling mechanism for facilitating demolding of a plastic part as recited in claim 3, wherein: the upper end of the unlocking pin (4a) is provided with a guide inclined surface (4a 1).