CN112356402A

CN112356402A - Deep barb demolding mechanism for side edge of injection mold

Info

Publication number: CN112356402A
Application number: CN202110034755.3A
Authority: CN
Inventors: 冯伟能
Original assignee: Ningbo Tianye Auto Parts Co ltd
Current assignee: Ningbo Tianye Auto Parts Co ltd
Priority date: 2021-01-12
Filing date: 2021-01-12
Publication date: 2021-02-12

Abstract

The invention discloses a deep barb demoulding mechanism on the side of an injection mould, which comprises an ejector block (1), ejector rods (2), a core-pulling block (3), a fixed block (4), ejector pins (5), a first ejector pin plate (6), a second ejector pin plate (7) and a template (8); the other side of the core-pulling block is provided with a first inclined plane (3.1) and is connected to a second inclined plane (4.1) of the fixed block (4) in a sliding manner through a T-shaped guide rail structure, the ejector block (1) is movably embedded into a channel of the core-pulling block (3), the bottom of the ejector pin (5) is fixed with the first ejector plate (6), the top of the ejector pin passes through a through hole of the template (8), and the top of the ejector pin passes through the template (8) and is fixed with the bottom of the core-pulling block (3); the core pulling is carried out in the straight ejector block in the secondary ejection structure of the demolding mechanism, the barb transversely moves to get rid of the vertical interference and then vertically demolds up and down, so that the product can be normally demolded, the occupied space position is not limited, and the demolding mechanism is compact in structure, simple, reliable and convenient to maintain in practical application.

Description

Deep barb demolding mechanism for side edge of injection mold

Technical Field

The invention relates to the technical field of injection molds, in particular to a deep barb demolding mechanism for a side edge of an injection mold.

Background

As shown in FIG. 1, the plastic product has a barb 101 at the bottom, and a convex strip 102 is arranged on the edge of the barb, based on the existence of the barb, the most conventional one-time mold opening by separating the barb 101 from the convex strip 102 up and down cannot be adopted, and the distance between the barb 101 and the convex strip 102 is only about 15mm, and the distance between the barb 101 and the convex strip is very close, so that the injection mold cannot be demolded by adopting the conventional oblique guide pillar, that is, the barb 101 is separated by a certain distance by the oblique guide pillar first, and then is demolded normally up and down, because the narrow space has no position for installing the oblique guide pillar, and the. Therefore, an injection mold structure which can enable the molded plastic product to be demoulded normally is urgently needed at present.

Disclosure of Invention

The invention aims to solve the technical problem of providing a demoulding mechanism with a deep barb on the side edge of an injection mould, which is compact in structure, simple, reliable and convenient to maintain, and has the advantages that core pulling is carried out in a straight ejector block in a secondary ejection structure, the barb transversely moves to get rid of vertical interference and then vertically demoulding up and down, so that a product can be normally demoulded, the occupied space position is not limited, and in practical application, the demoulding mechanism with the deep barb on the side edge of the injection mould is compact in.

The invention provides an injection mold side deep barb demolding mechanism with the following structure, which comprises an ejector block, an ejector rod, an ejector core block, a fixed block, an ejector pin, a first ejector pin plate, a second ejector pin plate and a template; the top block, the core pulling block and the fixing block are embedded into the concave cavity of the template, and the top surface of the top block, the top surface of the core pulling block, the top surface of the fixing block and the top surface of the template are used as the bottom surfaces of the first cavity of the whole product; the second cavity for forming the barb of the product is positioned on the side surface of the core pulling block, the other side of the core pulling block is a first inclined surface and is movably connected to the second inclined surface of the fixed block in a guiding mode through a T-shaped guide rail structure, an angle alpha between the first inclined surface and a vertical surface is an acute angle, a third cavity for forming the convex strip of the product is positioned on the top surface of the ejector block, and the core pulling block is movably matched with the ejector block and at least used for enabling the core pulling block to move in the left-right direction when the core pulling block is guided to move on the second inclined surface; the bottom of the ejector pin is fixed with the first ejector pin plate, the top of the ejector pin penetrates through the through hole of the template, the bottom of the ejector pin is fixed with the second ejector pin plate, and the top of the ejector pin is inserted into the template and fixed with the ejector block.

Preferably, the top block is provided with a channel, and the movable fit of the core block and the top block means that the channel of the core block and the channel of the top block are movably matched.

Preferably, the channel is an oblique channel, and the movable fit of the core block and the top block is as follows: the core pulling block is movably matched with an inclined channel of the ejector block, and the inclined channel is used for guiding the core pulling block to do inclined reciprocating motion.

Preferably, an angle β between the direction of the oblique reciprocating motion of the core block and the first inclined plane is an acute angle, and the angle α is smaller than the angle β.

Preferably, the angle α is 10 degrees.

Preferably, the angle β is 40 degrees.

Preferably, the channel is arranged in the middle of the top block, the top block is divided into a front part and a rear part by the channel, the front part and the rear part are front and rear symmetrical, and the core-pulling block is movably matched between the front part and the rear part.

Preferably, the top moving end of the ejector rod is connected with the front part and the rear part.

Preferably, the number of the ejector rods is two, the ejector rods are arranged in parallel, the jacking end of one ejector rod is connected with the front part, and the jacking end of the other ejector rod is connected with the rear part.

Preferably, the second inclined plane of the fixed block is provided with a T-shaped guide rail, and the first inclined plane of the core-pulling block is provided with a long groove matched with the T-shaped guide rail in a sliding manner.

After adopting the structure, compared with the prior art, the invention has the following advantages: adopt slider structure substep drawing of patterns, it is up to push up the kicking block earlier promptly, the kicking block drives the piece of loosing core upwards up simultaneously, but based on the piece of loosing core is the second inclined plane slip along the fixed block, so loose core still move (move left promptly) to the direction that is close to the fixed block when upwards moving, and be close to the fixed block and move, enable the barb after the shaping and can break away from lateral interference, make the barb draw of patterns from top to bottom smoothly at last. Moreover, the structure can be realized in a narrow space, and has good reliability and simple structure. The core pulling is carried out in the straight ejection block in the secondary ejection structure, the occupied space position is not limited, and the secondary ejection structure is compact in structure, simple, reliable and convenient to maintain in practical application.

Drawings

Fig. 1 is a schematic structural view of a product molded by the mold of the present invention.

Fig. 2 is an exploded view of the present invention.

FIG. 3 is a schematic representation of the invention after injection molding.

FIG. 4 is a schematic view of the first step of opening the mold according to the present invention.

FIG. 5 is a schematic view of the second step of opening the mold according to the present invention.

FIG. 6 is a schematic view of the mold opening of the present invention.

FIG. 7 is a schematic view of the first step of mold closing reset of the present invention.

FIG. 8 is a schematic diagram of the second step of mold closing reset of the present invention.

The drawing shows that 1, an ejector block, 1.1, a channel, 1.2, a guide groove, 1.3, a front part, 1.4, a rear part, 2, an ejector rod, 3, a core-pulling block, 3.1, a first inclined plane, 3.2, a long groove, 3.3, an inclined guide rail, 4, a fixed block, 4.1, a second inclined plane, 4.2, a T-shaped guide rail, 5, an ejector pin, 6, a first ejector pin plate, 7, a second ejector pin plate, 8, a template, 11, a second cavity, 12, a third cavity, 101, an barb, 102 and a convex strip.

Detailed Description

The invention will be further explained with reference to the drawings.

The drawings such as fig. 5, 6, 7, 8 and the like are mainly used for expressing the condition of opening and closing the mold, and the space is small, so the reference numerals are omitted, but the omitted reference numerals do not influence the understanding of the invention, and the relevant reference numerals without marks can refer to the drawings such as fig. 1, 2, 3, 4 and the like.

As shown in fig. 1-2, the deep barb demoulding mechanism for the side edge of the injection mould comprises an ejector block 1, an ejector rod 2, a core-pulling block 3, a fixed block 4, an ejector pin 5, a first ejector pin plate 6, a second ejector pin plate 7 and a mould plate 8.

The ejector block 1, the core-pulling block 3 and the fixing block 4 are embedded in a concave cavity of the template 8, and the top surface of the ejector block 1, the top surface of the core-pulling block 3, the top surface of the fixing block 4 and the top surface of the template 8 are used as the bottom surfaces of a first cavity of the whole product.

The second cavity 11 of the forming barb 101 is located on the side surface of the core-pulling block 3, the other side of the forming barb is a first inclined surface 3.1 and is connected to a second inclined surface 4.1 of the fixing block 4 in a sliding mode through a T-shaped guide rail structure, the second inclined surface 4.1 of the fixing block 4 is provided with a T-shaped guide rail 4.2, and the first inclined surface 3.1 of the core-pulling block 3 is provided with a long groove 3.2 matched with the T-shaped guide rail 4.2 in a sliding mode. The angle α between the first inclined surface 3.1 and the vertical surface is an acute angle, and the angle α is 10 degrees. The third cavity 12 of the molding convex strip 102 is positioned on the top surface of the top block 1,

as shown in fig. 2 and 3, the core block 3 is movably fitted in the channel 1.1 of the top block 1, and an angle β between the moving direction of the core block 3 along the channel 1.1 and the first inclined surface 3.1 is an acute angle, the angle β is 40 degrees, and the angle α is smaller than the angle β.

As shown in fig. 2 and 3, the passage 1.1 is an oblique passage, the core block 3 is movably matched with the oblique passage of the top block 1, and the oblique passage is used for guiding the core block 3 to do oblique reciprocating motion, so that the structure can be more favorably applied in a narrow space, namely when the space between the barb 101 and the convex strip 102 which need to be formed is smaller, the application can be realized by using the oblique passage, and if the design is not the oblique passage, the size of the top block 1 in the left and right directions is increased.

In order to make the movement more stable and reliable and ensure the precision, as shown in fig. 2, a channel 1.1 is arranged in the middle of the top block 1, the top block 1 is divided into a front part 1.3 and a rear part 1.4 by the channel 1.1, the front part and the rear part are front and rear symmetrical, the core block 3 is movably matched between the front part and the rear part, and the top moving end of the top rod 2 is connected with the front part and the rear part. In this example, the number of the top rods 2 is two, and the two top rods are arranged in parallel, the top moving end of one top rod 2 is connected with the front part, and the top moving end of the other top rod 2 is connected with the rear part.

In this example, in order to make the movement of the core-pulling block 3 more stable and reliable and ensure the precision, the surfaces of the front part 1.3 and the rear part 1.4 opposite to each other are provided with guide grooves 1.2, and the front side surface and the rear side surface of the corresponding core-pulling block 3 are provided with inclined guide rails 3.3 matched with the guide grooves 1.2. The foregoing structure can be referred to fig. 2.

The bottom of the ejector pin 5 is fixed with the first ejector pin plate 6, the top of the ejector pin penetrates through the through hole of the template 8, the bottom of the ejector pin 2 is fixed with the second ejector pin plate 7, and the top of the ejector pin 2 is inserted into the template 8 and fixed with the ejector block 1.

As shown in fig. 3, in a mold closing state, the top surfaces of the top block 1, the core-pulling block 3 and the fixed block 4 are flush;

as shown in fig. 4, the mold opening is performed in a first step, the first ejector plate 6 and the second ejector plate 7 ascend synchronously by a distance h1, the distance h1 is greater than or equal to the height of the barb 101, the second ejector plate 7 pushes the ejector block 1 to move vertically upwards, the ejector block 1 drives the core-pulling block 3 to move leftwards while inclining upwards along the second inclined surface 4.1 of the fixed block 4, the core-pulling block 3 is interfered by the guide rail 4.2 and the elongated slot 3.2 and can only slide upwards along the direction of the guide rail 4.2, namely the core-pulling block 3 inclines upwards, the ejector block 1 vertically upwards, and the distance from the core-pulling block 3 upwards is smaller than the distance from the ejector block 1 upwards.

The side of the core-pulling block 3 is far away from the inner side of the die until the distance between the side of the core-pulling block and the inner side of the die is larger than the width of the formed barb 101, and the formed barb 101 is positioned between the side of the core-pulling block 3 and the inner side of the die, so that the barb 101 can be upwards and get rid of the interference in the vertical direction by the upward inclination of the core-pulling block 3.

The molded convex strip 102 is embedded in the third cavity 12, and in the process of the ascending distance h1, the first ejector plate 6 pushes the ejector pins 5 and the second ejector plate 7 pushes the ejector block 1 to vertically eject the molded product upwards; due to the acute angle α, when the top block 1 slides upward by a distance h1, the core block 3 slides upward by a distance less than h 1.

As shown in fig. 5, in the second step of opening the mold, the first ejector plate 6 is lifted by a distance h2 again, and the molded product is ejected upwards continuously until the molded protruding strip 102 is separated from the third cavity of the core pulling block 3.

As shown in fig. 6, the first step from mold opening to mold closing is: the first ejector plate 6 moves downwards for a distance h2, and drives the ejector 5 to move downwards for a distance h 2.

As shown in fig. 7 and 8, from the first mold clamping step to the second mold clamping step: first thimble board 6 and the synchronous downstream distance h1 of second thimble board 7, first thimble board 6 drives thimble 5 downstream distance h1, second thimble board 7 drives kicking block 1 and ejector pin 2 downwards, core block 3 slides down and moves right and resets along T type guide rail structure.

The foregoing is illustrative of the present invention and all such equivalent changes and modifications in the structure, features and principles described herein are intended to be included within the scope of the present invention.

Claims

1. The utility model provides a deep barb demoulding mechanism of injection mold side which characterized in that: the ejector pin structure comprises an ejector block (1), ejector pins (2), a core-pulling block (3), a fixed block (4), ejector pins (5), a first ejector pin plate (6), a second ejector pin plate (7) and a template (8); the top block (1), the core-pulling block (3) and the fixing block (4) are embedded into a cavity of the template (8), and the top surface of the top block (1), the top surface of the core-pulling block (3), the top surface of the fixing block (4) and the top surface of the template (8) are used as the bottom surface of a first cavity of the whole product; a second cavity (11) for forming a barb (101) of the product is positioned on the side surface of a core-pulling block (3), the other side of the core-pulling block (3) is a first inclined surface (3.1) and is movably connected to a second inclined surface (4.1) of a fixed block (4) in a guiding way through a T-shaped guide rail structure, an angle alpha between the first inclined surface (3.1) and a vertical surface is an acute angle, a third cavity (12) for forming a convex strip (102) of the product is positioned on the top surface of an ejector block (1), and the core-pulling block (3) is movably matched with the ejector block (1) and at least used for moving in the left-right direction when the core-pulling block (3) is movably guided on the second inclined surface (4.1); the bottom of ejector pin (5) is fixed with first thimble board (6), and the through-hole of template (8) is passed at the top, the bottom and second thimble board (7) of ejector pin (2) are fixed, template (8) are inserted at the top of ejector pin (2) to it is fixed with kicking block (1).

2. The injection mold lateral deep barb demolding mechanism as claimed in claim 1, wherein: the ejector block (1) is provided with a channel (1.1), and the movable fit of the core-pulling block (3) and the ejector block (1) refers to the movable fit of the core-pulling block (3) and the channel (1.1) of the ejector block (1).

3. The injection mold lateral deep barb demolding mechanism as claimed in claim 2, wherein: the channel (1.1) is an oblique channel, and the movable fit of the core-pulling block (3) and the top block (1) refers to that: the core-pulling block (3) is movably matched with an oblique channel (1.1) of the top block (1), and the oblique channel (1.1) is used for guiding the core-pulling block (3) to do oblique reciprocating motion.

4. The injection mold lateral deep barb demolding mechanism as claimed in claim 3, wherein: an angle beta between the direction of the oblique reciprocating motion of the core-pulling block (3) and the first inclined plane (3.1) is an acute angle, and the angle alpha is smaller than the angle beta.

5. The injection mold lateral deep barb demolding mechanism as claimed in claim 4, wherein: the angle alpha is 10 degrees.

6. The injection mold lateral deep barb demolding mechanism as claimed in claim 5, wherein: the angle beta is 40 degrees.

7. The injection mold lateral deep barb demolding mechanism as claimed in claim 2, wherein: the channel (1.1) is arranged in the middle of the top block (1), the top block (1) is divided into a front part and a rear part by the channel (1.1) in a front-back symmetrical mode, and the core-pulling block (3) is movably matched between the front part and the rear part.

8. The injection mold lateral deep barb demolding mechanism of claim 7, wherein: the jacking end of the jacking rod (2) is connected with the front part and the rear part.

9. The injection mold lateral deep barb demolding mechanism of claim 8, wherein: the number of the ejector rods (2) is two, the ejector rods are arranged in parallel, the jacking end of one ejector rod (2) is connected with the front part, and the jacking end of the other ejector rod (2) is connected with the rear part.

10. The injection mold lateral deep barb demolding mechanism as claimed in claim 1, wherein: the second inclined plane (4.1) of the fixing block (4) is provided with a T-shaped guide rail (4.2), and the first inclined plane (3.1) of the core-pulling block (3) is provided with a long groove (3.2) matched with the T-shaped guide rail (4.2) in a sliding manner.