CN214773588U

CN214773588U - Compression injection mold structure

Info

Publication number: CN214773588U
Application number: CN202022099705.7U
Authority: CN
Inventors: 杨俊建
Original assignee: Biel Crystal Manufactory Huizhou Ltd
Current assignee: Biel Crystal Manufactory Huizhou Ltd
Priority date: 2020-09-23
Filing date: 2020-09-23
Publication date: 2021-11-19
Anticipated expiration: 2030-09-23

Abstract

The utility model discloses a compression injection mold structure, which comprises a rear mold split block and a rear mold core, wherein the top surface of the rear mold split block is provided with a first groove, and the rear mold core is arranged in the first groove; and a rolling device is arranged between the outer side surface of the rear mold core and the inner side surface of the first groove, and when the rear mold core moves up and down relative to the first groove, the outer side surface of the rear mold core and the inner side surface of the first groove are in rolling contact through the rolling device. The utility model has the advantages of reasonable design, through setting up the rolling device between the lateral surface of back mould benevolence and the medial surface of first recess to change original face friction motion into the rolling friction motion that goes on through the rolling device, and the rolling friction motion will reduce and contact the friction loss that produces between the lateral surface of back mould benevolence and the medial surface of first recess, thereby reduce the damage to the medial surface of piece together to the back mould, improved the life of mould.

Description

Compression injection mold structure

Technical Field

The utility model relates to an injection mold technical field especially relates to a compression injection mold structure.

Background

The compression injection mold is mainly used for molding ultrathin products, such as mobile phone rear covers, ultrathin light guide plates, vehicle-mounted industrial controls, computer display screens, liquid crystal display screens and other optical products.

However, the conventional injection mold has the following problems:

firstly, in the process of closing and opening the die, surface friction is carried out between the outer side surface of the rear die core and the inner side surface of the rear die splicing block, so that large friction loss is generated on the inner side surface of the rear die splicing block, the inner side surface of the rear die splicing block is usually formed by high-polishing precision processing, and once too much friction loss is carried out on the inner side surface, the service life of the die can be reduced;

secondly, because compression injection molding is required, the injection mold is usually matched between the rear template and the rear mold push plate by using a spring structure, but the compressibility of the spring structure is poor, so that the compressibility between the rear template and the rear mold push plate is small; meanwhile, the spring structure can cause uneven stress at each position of the rear template; the above two points will cause the problems of unstable thickness, low yield, thick product thickness, etc. in the product production.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a compression injection mold structure to solve the technical problem that produces great friction loss between the contact surface that back mould benevolence and back mould piece together.

In order to achieve the above object, the technical scheme of the utility model provides a compression injection mold, which comprises a rear mold split block and a rear mold core, wherein the top surface of the rear mold split block is provided with a first groove, and the rear mold core is arranged in the first groove; and a rolling device is arranged between the outer side surface of the rear mold core and the inner side surface of the first groove, and when the rear mold core moves up and down relative to the first groove, the outer side surface of the rear mold core and the inner side surface of the first groove are in rolling contact through the rolling device.

Furthermore, a push rod is arranged in the first groove and pushes the rear mold core to vertically move upwards relative to the first groove.

Further, the rolling device is a needle roller device.

Furthermore, a roller pin mounting groove is formed in the outer side face of the rear mold core, and the rolling device is mounted in the roller pin mounting groove; the needle roller mounting groove is arranged in the horizontal direction.

Further, the rear mold split is mounted on the top surface of the rear mold plate.

Furthermore, a second groove is formed in the top surface of the rear template, and the rear template splicing blocks are installed in the second groove; the bottom surface of the rear die splicing block is fixedly connected with the top surface of the rear die cushion block, and the bottom surface of the first groove is fixedly connected with the bottom surface of the rear die cushion block.

Further, the rear template is arranged on the top surface of the rear template push plate; a gap is reserved between the bottom surface of the rear template and the top surface of the rear mold push plate, and a stacked elastic sheet is arranged between the bottom surface of the rear template and the top surface of the rear mold push plate; the stacked elastic sheet is elastically compressed when being pressed so as to realize compression injection molding; and the laminated elastic sheet rebounds after being pressed, so that the rear template is separated from the rear template push plate.

Furthermore, a plurality of counter bores are regularly arranged on the top surface of the rear die push plate, and the stacked elastic sheets are respectively arranged in the counter bores; the bottom end of the stacked elastic sheet is fixedly arranged in the counter bore, and the top end of the stacked elastic sheet penetrates through the counter bore to be in contact with the bottom surface of the rear template; the size of clearance is 0 ~ 3 mm.

Furthermore, the bottom surface of the rear template is connected with the top surface of the rear template push plate through a limiting device, the limiting device is used for limiting the distance between the rear template and the rear template push plate when the rear template and the rear template push plate are separated, and the limiting device guides the movement of the rear template when the rear template is compressed downwards or separated upwards.

Further, the rear die push plate is arranged on the top surface of the die leg; the mould feet are arranged on the lower fixing plate; the bottom surface of mould foot is equipped with the third recess, install the thimble board in the third recess, the thimble board with leave the clearance between the third recess, so that the thimble board is in when the ejector pin promotes carry out vertical ascending motion in the third recess.

To sum up, the application the technical scheme of the utility model, following beneficial effect has: the utility model has the advantages of reasonable design, through setting up the rolling device between the lateral surface of back mould benevolence and the medial surface of first recess, thereby when the relative first recess of back mould benevolence carries out the motion of direction from top to bottom, produced motion will be changed into the rolling friction motion that goes on through the rolling device by original face friction motion between the lateral surface of back mould benevolence and the medial surface of first recess, and the rolling friction motion will reduce the friction loss that contacts and produce between the lateral surface of back mould benevolence and the medial surface of first recess, thereby the medial surface of piece together the piece reduces the damage to the back mould, thereby improve the mould life. The bottom surface of the rear template and the top surface of the rear mould push plate are provided with the overlapped elastic sheets, the compressibility of the overlapped elastic sheets is better than that of a spring, and therefore the compressibility between the rear template and the rear mould push plate is improved. Through regularly being equipped with a plurality of counter bore to be equipped with the type shell fragment of folding in each counter bore respectively, thereby make the atress of back template more even, thereby improve the stability of product, production yield, and the product thickness of production can fall to 0.5mm minimum.

Drawings

FIG. 1 is a schematic perspective view of a compression injection mold structure according to the present invention;

FIG. 2 is a schematic view of the three-dimensional structure of the compression injection mold of the present invention when the rear mold core is separated from the front mold core;

FIG. 3 is a schematic perspective view of a rear mold push plate of the compression injection mold structure of the present invention;

101-lower fixing plate, 102-upper fixing plate; 201-lower ejector plate, 202-upper ejector plate; 3-a mould leg; 4-rear mould push plate, 401-stacked elastic sheet, 402-limiting device and 403-lower zero-degree positioning block; 501-rear template, 502-front template and 5011-upper zero-degree positioning block; 6-splicing the rear mould; 701-a rear mold core, 7011-a needle roller installation groove and 702-a front mold core; 8-rear mould cushion blocks; 9-injection molding product.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, but the technical solution does not limit the scope of the present invention.

In the present invention, for the sake of clearer description, the following explanation is made: the observer is observing in the face of fig. 1, the left side of the observer is set as left, the right side of the observer is set as right, the front side of the observer is set as front, the rear side of the observer is set as rear, the upper side of the observer is set as up, and the lower side of the observer is set as down, it should be noted that the terms "front end", "rear end", "left side", "right side", "middle part", "upper part", "lower part", etc., in the text indicate the orientation or positional relationship to be set based on the drawings, only for the convenience of clearly describing the present invention, but not to indicate or suggest that the structure or component indicated must have a specific orientation, be constructed in a specific orientation, and therefore, cannot be understood as a limitation of the present invention. Furthermore, the terms "first," "second," "third," and "fourth" are used merely for purposes of clarity or simplicity of description and are not to be construed as indicating or implying relative importance or quantity.

Referring to fig. 1 and 2, the present embodiment provides a compression injection mold, which includes a rear mold segment 6 and a rear mold core 701, wherein the rear mold core 701 and a front mold core 702 jointly form a mold core, and contact surfaces of the combination of the rear mold core 701 and the front mold core 702 are combined in a concave-convex manner to form a product cavity. The top surface of the rear mold split block 6 is provided with a first groove, and the rear mold core 701 is installed in the first groove, that is, the rear mold split block 6 is located around the rear mold core 701 and used for installing and fixing the rear mold core 701. The position of the rear mold insert 6 affects the position of the rear mold insert 701, and further affects the shape structure of the injection molding product 9, so that the part of the inner side surface of the rear mold insert 6, which is in contact with the outer side surface of the rear mold insert, is processed with high polishing precision, and therefore, when the product model is changed, the model switching can be completed only by changing the mold insert and the rear mold insert 6, and the problem that the whole rear mold plate 501 needs to be changed is solved. A rolling device is disposed between the outer side of the rear mold core 701 and the inner side of the first groove, preferably, the rolling device is a roller pin device, and other rolling devices having the same function, such as balls, may also be used. More preferably, the needle roller mounting groove 7011 is formed in the outer side surface of the rear mold core 701, the needle roller mounting groove 7011 is formed in the horizontal direction, preferably, each contact surface between the rear mold core 701 and the rear mold split 6 is provided with a needle roller mounting groove 7011 which is parallel to the mold core edge and perpendicular to the axial direction, the mold core edge refers to the horizontal edges of the upper and lower bottom surfaces, the rolling device is mounted in the needle roller mounting groove 7011, and the axial direction refers to the vertical direction.

Specifically, the rear mold core 701 is driven to move up and down relative to the first groove, wherein the rear mold core 701 is pushed by the push rod to move up relative to the rear mold split block 6, and the push rod is located in the first groove. The downward movement of the rear mold core 701 may be driven by other drive mechanisms.

Specifically, when the rear mold core 701 moves in the vertical direction relative to the first groove, the outer side surface of the rear mold core 701 and the inner side surface of the first groove are in rolling contact through a rolling device. Therefore, in the process that the rear mold core 701 moves in the vertical direction, the friction motion between the rear mold core and the rear mold split blocks is replaced by surface friction into rolling friction carried out by a rolling device, the abrasion of the friction on the inner side of the rear mold split block 6 is greatly reduced, and the service life of the mold is prolonged.

Specifically, the rear mold split 6 is mounted on the top surface of the rear mold plate 501, a second groove is formed in the top surface of the rear mold plate 501, and the rear mold split 6 is mounted in the second groove; the bottom surface of the rear die splicing block 6 is fixedly connected with the top surface of the rear die cushion block 8, and the bottom surface of the first groove is fixedly connected with the bottom surface of the rear die cushion block 8.

Specifically, referring to fig. 3, the rear mold plate 501 is mounted on the top surface of the rear mold push plate 4, and a compression distance gap of the stack type elastic sheet is left between the bottom surface of the rear mold plate 501 and the top surface of the rear mold push plate 4, where the compression distance gap refers to a distance between the bottom surface of the rear mold plate 501 and the top surface of the rear mold push plate 4 after the stack type elastic sheet is in a compressed state, and the distance is used for compressing the stack type elastic sheet. A laminated elastic sheet 401 is arranged between the bottom surface of the rear template 501 and the top surface of the rear template push plate 4; the laminated spring plate 401 is elastically compressed when being pressed so as to realize compression injection molding; the stack type elastic sheet 401 is rebounded after the pressing is finished to separate the rear mold plate 501 from the rear mold push plate 4.

Preferably, the top surface of the rear die push plate 4 is regularly provided with a plurality of counter bores, and the counter bores are respectively internally provided with the stacked elastic sheets 401; the bottom end of the stack-type elastic sheet 401 is fixed in the counter bore, the stack-type elastic sheet protrudes out of the counter bore after being installed, and the top end part of the protruding counter bore is in contact with the bottom surface of the rear template 501. The size of the gap is 0-3 mm. The bottom surface of the rear template 501 is connected with the top surface of the rear template push plate 4 through a limiting device 402, and the limiting device 402 is used for limiting the distance between the rear template 501 and the rear template push plate 4 during separation, so that the effect of adjustable separation is realized. While the stopper 402 guides the movement of the rear mold plate 501 when performing downward compression or upward separation. An upper zero-degree positioning block 5011 is arranged at the bottom edge of the rear template 501, a lower zero-degree positioning block 403 is arranged at the top edge of the rear template push plate 4, and the upper zero-degree positioning block 5011 and the lower zero-degree positioning block 403 are matched together to form a zero-degree positioning block so as to perform positioning matching on the rear template 501 and the rear template push plate 4.

Specifically, the bottom end side of the rear mold push plate 4 is mounted on the top surface of the mold leg 3, and the mold leg 3 is located above the lower fixed plate 101 and mounted on the top surface of the lower fixed plate 101 through a connecting member.

Specifically, the bottom surface of the mold leg 3 is provided with a third groove, an ejector plate is installed in the third groove, and a gap is reserved between the ejector plate and the third groove, so that the ejector plate moves vertically upwards in the third groove when the ejector rod pushes, and then the injection molding product 9 is ejected, and the ejector rod is a driving piece of the injection molding machine. And a space for the ejector pin plate to move up and down is reserved between the bottom surface of the mold foot 3 and the top surface of the lower fixing device 101, and the mold foot 3 is used for limiting and fixing the position of the ejector pin plate.

Specifically, the ejector plate is composed of an upper ejector plate 202 and a lower ejector plate 201, the upper ejector plate 202 is located on the top surface of the lower ejector plate 201, and the lower ejector plate 201 is connected with the ejector rods.

Specifically, the upper fixing plate 102 and the lower fixing plate 101 are respectively located at the upper side and the lower side of the whole set of mold, and are used for installing and fixing the whole set of mold to fix the mold. Specifically, the upper fixing plate 102 and the lower fixing plate 101 are respectively mounted on the compression injection molding machine, that is, are respectively mounted on the compression injection molding machine pressurizing movable shafts. And the upper fixing plate 102 is positioned above the lower fixing plate 101.

Specifically, the front mold plate 502 is installed on the bottom surface of the upper fixing plate 102, a fourth groove is formed on the bottom surface of the front mold plate 502, the front mold core 702 is installed in the fourth groove, and the front mold plate 502 is used for installing and fixing the front mold core 702.

The foregoing is a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the principle of the present invention, and these improvements and decorations are also considered as the protection scope of the present invention.

Claims

1. A compression injection mold comprises rear mold split blocks (6) and rear mold cores (701), wherein a first groove is formed in the top surface of each rear mold split block (6), and each rear mold core (701) is installed in the corresponding first groove; the method is characterized in that: a rolling device is arranged between the outer side surface of the rear mold core (701) and the inner side surface of the first groove, and when the rear mold core (701) moves up and down relative to the first groove, the outer side surface of the rear mold core (701) and the inner side surface of the first groove are in rolling contact through the rolling device.

2. A compression injection mold as defined in claim 1, wherein: a push rod is arranged in the first groove and pushes the rear mold core (701) to vertically move upwards relative to the first groove.

3. A compression injection mould according to claim 1 or 2, characterized in that: the rolling device is a needle roller device.

4. A compression injection mold as defined in claim 3, wherein: a roller pin installation groove (7011) is formed in the outer side face of the rear die core (701), and the rolling device is installed in the roller pin installation groove (7011); the needle roller mounting groove (7011) is arranged in the horizontal direction.

5. A compression injection mould according to claim 1, 2 or 4, characterized in that: the rear die splicing block (6) is arranged on the top surface of the rear die plate (501).

6. A compression injection mould as claimed in claim 5, wherein: the top surface of the rear template (501) is provided with a second groove, and the rear template splicing block (6) is arranged in the second groove; the bottom surface of the rear die splicing block (6) is fixedly connected with the top surface of the rear die cushion block (8), and the bottom surface of the first groove is fixedly connected with the bottom surface of the rear die cushion block (8).

7. A compression injection mould as claimed in claim 5, wherein: the rear template (501) is arranged on the top surface of the rear template push plate (4); a gap is reserved between the bottom surface of the rear template (501) and the top surface of the rear mold push plate (4), and a laminated elastic sheet (401) is arranged between the bottom surface of the rear template (501) and the top surface of the rear mold push plate (4); the laminated elastic sheet (401) is elastically compressed when being pressed so as to realize compression injection molding; and the laminated elastic sheet (401) rebounds after being pressed, so that the rear template (501) is separated from the rear mould push plate (4).

8. A compression injection mold as defined in claim 7, wherein: the top surface of the rear die push plate (4) is regularly provided with a plurality of counter bores, and the stacked elastic sheets (401) are respectively arranged in the counter bores; the bottom end of the stacked elastic sheet (401) is fixedly arranged in the counter bore, and the top end of the stacked elastic sheet (401) penetrates through the counter bore to be in contact with the bottom surface of the rear template (501); the size of clearance is 0 ~ 3 mm.

9. A compression injection mould as claimed in claim 7 or 8, wherein: the bottom surface of the rear template (501) is connected with the top surface of the rear template push plate (4) through a limiting device (402), the limiting device (402) is used for limiting the distance between the rear template (501) and the rear template push plate (4) during separation, and the limiting device (402) guides the movement of the rear template (501) during downward compression or upward separation.

10. A compression injection mold as defined in claim 9, wherein: the rear mould push plate (4) is arranged on the top surface of the mould foot (3); the mould feet (3) are arranged on the lower fixing plate (101); the bottom surface of moulding foot (3) is equipped with the third recess, install the thimble board in the third recess, the thimble board with leave the clearance between the third recess, so that the thimble board is in when the ejector pin promotes carry out vertical ascending motion in the third recess.