CN114643670B - Anti-edging hot-press forming die and thin film anti-edging forming process - Google Patents
Anti-edging hot-press forming die and thin film anti-edging forming process Download PDFInfo
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- CN114643670B CN114643670B CN202210257367.6A CN202210257367A CN114643670B CN 114643670 B CN114643670 B CN 114643670B CN 202210257367 A CN202210257367 A CN 202210257367A CN 114643670 B CN114643670 B CN 114643670B
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- die
- soft rubber
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- core
- film
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- 238000000034 method Methods 0.000 title claims abstract description 18
- 238000007688 edging Methods 0.000 title claims abstract description 13
- 239000010409 thin film Substances 0.000 title claims description 10
- 238000010438 heat treatment Methods 0.000 claims abstract description 21
- 239000010408 film Substances 0.000 claims description 52
- 239000003292 glue Substances 0.000 claims description 15
- 238000009957 hemming Methods 0.000 claims description 4
- 150000001875 compounds Chemical class 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 2
- 230000002093 peripheral effect Effects 0.000 claims description 2
- 238000005452 bending Methods 0.000 abstract description 8
- 238000000465 moulding Methods 0.000 abstract description 8
- 239000004033 plastic Substances 0.000 abstract description 3
- 238000012797 qualification Methods 0.000 abstract description 3
- 238000001746 injection moulding Methods 0.000 description 7
- 238000009434 installation Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 229920002799 BoPET Polymers 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005034 decoration Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
- B29C43/32—Component parts, details or accessories; Auxiliary operations
- B29C43/36—Moulds for making articles of definite length, i.e. discrete articles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
- B29C43/02—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
- B29C43/32—Component parts, details or accessories; Auxiliary operations
- B29C43/36—Moulds for making articles of definite length, i.e. discrete articles
- B29C2043/3602—Moulds for making articles of definite length, i.e. discrete articles with means for positioning, fastening or clamping the material to be formed or preforms inside the mould
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Shaping Of Tube Ends By Bending Or Straightening (AREA)
Abstract
The invention provides a reverse-edging hot-press forming die and a film reverse-edging forming process, wherein the forming die comprises a lower die, an upper die and a heating device movably arranged between the upper die and the lower die, the lower die and the upper die are respectively provided with a lower die core and an upper die core, the lower die core is provided with a soft rubber part, the front end and the rear end of the upper die core are provided with concave clamping grooves, the circumferential edge of the soft rubber part is provided with convex edges extending upwards, and the front end and the rear end of the soft rubber part are tilted upwards so that the convex edges at the front end and the rear end of the soft rubber part can be clamped into the concave clamping grooves when the upper die core is clamped to the lower die core; the molding process comprises the steps of die loading, heating, die closing, continuous pressing, die stripping and the like. The invention can realize secondary bending forming at one time to realize the reverse edge wrapping of the product, does not need to carry out a secondary forming process, has fewer working procedures, can save labor, improves the qualification rate, optimizes the cost, and simultaneously solves the problem that the film and the plastic part of the product are separated due to high temperature of certain electrical products.
Description
Technical Field
The invention relates to a reverse-edging hot-press forming die and a film reverse-edging forming process.
Background
The conventional surface decoration technology is generally a one-step molding technology, in which a film sheet is subjected to one-step bending molding by a common molding die, so that the film sheet is molded into a desired shape, and then the molded film sheet is placed into an injection mold for injection molding. The film formed by one-time bending does not reversely cover the injection molding product, so that the edge of the injection molding product is exposed, the edge part of the injection molding product is easy to separate from the film due to the fact that a gap is formed between the edge part of the injection molding product and the film, and the overall attractiveness of the product is also affected.
Disclosure of Invention
The invention aims to solve the technical problem of providing a reverse-wrapping hot-press forming die and a reverse-wrapping forming process for a film, which can realize the secondary bending forming of the film at one time.
The purpose of the invention is realized in the following way:
the utility model provides a hot briquetting mould of borduring of being used for, includes lower mould, goes up mould and movably locates go up the mould with heating device between the lower mould, the lower mould with go up and be equipped with lower mold core and last mold core on the mould respectively, be equipped with the flexible glue spare on the lower mold core, both ends are equipped with indent draw-in groove around going up the mold core, the circumference edge of flexible glue spare is equipped with the chimb that upwards extends, both ends tilt up so that the chimb at both ends can be in around it go up the mold core compound die extremely the indent draw-in groove is gone into to the time of the mold core.
According to the invention, the film piece to be processed is arranged on the soft rubber piece on the lower mold core, the heating device is moved into the space between the upper mold and the lower mold and heats and softens the film piece on the software piece, then the heating device is moved out, the upper mold core is moved down to press the mold, so that the heated film piece is pressed onto the soft rubber piece and bent into the shape same as the upper surface of the soft rubber piece, then the upper mold core is continuously pressed down to enable the two ends of the soft rubber piece to deform and warp inwards, the convex edges at the front end and the rear end of the soft rubber piece drive the front end and the rear end of the film piece to clamp into the concave clamping groove, the film piece is secondarily bent and formed with the reverse wrapping edge, and finally the upper mold is separated from the lower mold, thereby obtaining the film piece with the reverse wrapping edge.
The lower die comprises a die frame, the lower die core is arranged in the die frame, and an installation cavity for setting the soft rubber piece is arranged between the lower die core and the die frame, so that the compactness of the overall structure of the lower die is ensured, and a film piece to be processed is convenient to install.
According to the anti-edging hot-press forming die, the locating cavities are formed in the die frame, and the locating blocks are arranged on the front side and the rear side of the locating cavities, so that the upper die is effectively prevented from being displaced after die assembly.
According to the anti-edging hot-press forming die, the four corner positions of the positioning cavity are respectively provided with the positioning notch, and each positioning notch is provided with the positioning piece, so that the thin film sheet is conveniently positioned, the thin film sheet is conveniently arranged on the soft rubber piece, and in addition, the positioning pieces can further limit the upper die core.
The upper die comprises an upper bottom plate arranged on the upper die core, and limiting blocks are arranged at the positions of the front, the rear, the left and the right of the bottom of the upper bottom plate, so that the upper die is effectively limited in the up-down direction when the dies are closed.
The lower die further comprises a lower bottom plate arranged at the bottom of the die frame, a thimble is arranged between the lower bottom plate and the bottom of the lower die core, and a spring is sleeved on the thimble, so that the lower die is elastically buffered during die assembly.
A film reverse edge-covering molding process comprises the following steps: the upper die is used for mounting the film sheet to be processed on the soft rubber piece, and positioning the film sheet through convex edges at the front end and the rear end of the soft rubber piece and four positioning pieces; heating, wherein the heating device moves to the upper part of the lower die and heats and softens the film piece arranged on the soft rubber piece, and the heating device moves out after heating and softening; closing the die, wherein the upper die core presses the die downwards to enable the heated film sheet to be pressed onto the soft rubber piece and bent into the shape the same as the upper surface of the soft rubber piece; the upper mold core continuously presses downwards to enable the two ends of the soft rubber piece to deform and warp inwards, convex edges at the front end and the rear end of the soft rubber piece drive the front end and the rear end of the thin film piece to be clamped into the concave clamping grooves, and the thin film piece is bent for the second time and is formed with reverse wrapping edges; and demolding, wherein the upper die is separated from the lower die, so that the film piece with the reverse edge wrapping is obtained.
The process is simple, can realize secondary bending forming at one time to realize the reverse edge wrapping of the product, does not need to carry out the secondary forming process, has fewer procedures, can save labor, improves the qualification rate, optimizes the cost, and simultaneously solves the problem that the film and the plastic part of the product are separated due to high temperature of certain electrical products.
Drawings
The invention is described in further detail below with reference to the attached drawing figures, wherein:
FIG. 1 is a schematic diagram of an exploded construction of the present invention;
FIG. 2 is a schematic view of the structure of the upper mold core according to the present invention;
FIG. 3 is a schematic view of the lower die according to the present invention;
FIG. 4 is a schematic cross-sectional view of the present invention;
FIG. 5 is a schematic structural view of the flexible glue member according to the present invention;
fig. 6 is a schematic structural view of a film member produced by the reverse hemming hot press forming die and process of the present invention.
Detailed Description
The utility model provides a hot briquetting mould of borduring, includes lower mould 1, go up mould 2 and locates the heating device 3 between upper mould 2 and the lower mould 1 movably, is equipped with lower mold core 11 and last mold core 21 on lower mould 1 and the upper mould 2 respectively, is equipped with flexible glue spare 4 on the lower mold core 11, and both ends are equipped with indent draw-in groove 111 around the upper mold core 21, and the peripheral edge of flexible glue spare 4 is equipped with the chimb 41 of upwards extending, and both ends upwards perk so that the chimb 41 at both ends can block into indent draw-in groove 111 when last mold core 21 compound die to lower mold core 11 around flexible glue spare 4.
In order to ensure the compactness of the whole structure of the lower die 1 and facilitate the installation of the film sheet 10 to be processed, the lower die 1 comprises a die frame 12, a lower die core 11 is arranged in the die frame 12, and an installation cavity 121 for arranging the soft rubber piece 4 is arranged between the lower die core 11 and the die frame 12. The flexible glue member 4 can prevent the film (preferably PET film) from being damaged by the direct rigid contact between the upper mold core 21 and the lower mold core 11, in addition to the secondary bending molding (reverse taping molding) of the film. Preferably, the soft rubber member 4 is made of PU material, which is resistant to high temperature.
In order to prevent the upper die 2 from being displaced in the front-rear direction after being clamped, the die frame 12 is provided with a positioning cavity 122, and the die frame 12 is provided with positioning blocks 123 on the front side and the rear side of the positioning cavity 122. The two positioning blocks 123 limit the front and rear sides of the upper mold core 21 after mold closing, and prevent the displacement of the upper mold core in the front and rear directions. The upper surface shapes of the soft rubber piece 4, the mounting cavity 121, the positioning cavity 122 and the lower mold core 11 are matched with the lower surface shapes of the upper mold core 21, and the front end and the rear end of the upper mold core 21 are provided with protruding cambered surfaces 210 protruding downwards at the bottom positions.
In order to facilitate positioning the film sheet 10 so as to mount the film sheet 10 on the flexible glue member 4, positioning notches 124 are disposed at four corners of the positioning cavity 122, and positioning members 125 are disposed on each positioning notch 124. After the mold is closed, the upper mold core 21 is engaged with the 4 positioning members 125, thereby preventing the upper mold 2 from being displaced in the left-right direction. When the film piece 10 to be processed is placed, the front end and the rear end of the film piece 10 are positioned through the convex edges 41 at the front end and the rear end of the flexible glue piece 4 (the front end and the rear end of the film piece 10 are bent into the arc concave surfaces of the two ends of the flexible glue piece 4 and the convex cambered surfaces 210 in a matched mode, the front end and the rear end of the film piece 10 are slightly bent into the inner side walls of the convex edges 41 at the front end and the rear end of the flexible glue piece 4), and the left side and the right side of the film piece 10 are positioned through the positioning pieces 125 in the four positioning notches 124 of the positioning cavity 122 respectively, so that the positioning device is convenient to install and good in positioning effect.
In order to effectively limit the upper die 2 in the vertical direction during die assembly, the upper die 2 comprises an upper bottom plate 22 arranged on an upper die core 21, and limiting blocks 23 are arranged at the positions of the front, the rear, the left and the right of the bottom of the upper bottom plate 22. After the mold is closed, the upper plate 22 is abutted against the mold frame 12 by 4 stoppers 23. The upper plate 22 is connected to the output of the mold clamping drive.
In order to reduce the impact of the upper die 2 on the lower die 1 and elastically buffer the lower die 1 during die assembly, the lower die 1 further comprises a lower bottom plate 13 arranged at the bottom of the die frame 12, a thimble 14 is arranged between the lower bottom plate 13 and the bottom of the lower die core 11, and a spring is sleeved on the thimble 14. The bottom of the lower mold core 11 and the top of the lower base plate 13 are each provided with a mounting groove 100 for receiving a spring (not shown in the drawings). The lower plate 13 is fixed to a fixed platform. The heating device 3 is driven by a translational driving device (not shown in the figure) to move in between the upper die 2 and the lower die 1 or out. After the heating device 3 heats and softens the film sheet 10, the film sheet 10 can have certain deformation extension capacity, so that the film sheet is convenient to complete secondary bending and forming at one time.
A film reverse edge-covering molding process comprises the following steps: the upper die is used for mounting the film sheet 10 to be processed on the soft rubber piece 4 and positioning the film sheet 10 through convex edges 41 at the front end and the rear end of the soft rubber piece 4 and four positioning pieces 125; heating, wherein the heating device 3 moves to the upper part of the lower die 1 and heats and softens the film piece 10 arranged on the soft rubber piece 4, and the heating device 3 moves out after heating and softening; the upper mold core 21 presses the lower mold core 11 downwards to press the heated film sheet 10 onto the soft rubber piece 4 and bend the film sheet into the shape same as the upper surface of the soft rubber piece 4; the upper mold core 21 continuously presses downwards to the lower mold core 11, so that the two ends of the flexible glue piece 4 deform and warp inwards, the convex edges 41 at the front end and the rear end drive the front end and the rear end of the thin film piece 10 to be clamped into the concave clamping groove 111, and the thin film piece 10 is secondarily bent and is formed with a reverse wrapping edge; and demolding, wherein the upper die 2 is separated from the lower die 1, so that the film piece 20 with the reverse edge wrapping is obtained.
The hot-press forming die for the reverse edge wrapping can realize the reverse edge wrapping of products by one-time secondary bending forming without carrying out a secondary forming process, and the reverse edge wrapping of the products ensures that the edge of the injection molding products is not exposed, so that no gap exists between the edge part of the injection molding products and the film, the phenomenon that the film and the plastic part of the products are separated due to high temperature of certain electrical products is solved, and the overall attractive effect is better than that of the traditional products; the invention has simple process and few working procedures, can save labor, improve the qualification rate and optimize the cost.
Claims (8)
1. The utility model provides a hot briquetting mould of anti-borduring, its characterized in that includes lower mould (1), goes up mould (2) and movably locates go up mould (2) with heating device (3) between lower mould (1), lower mould (1) with go up be equipped with down mold core (11) and last mold core (21) on mould (2) respectively, be equipped with flexible glue spare (4) on lower mold core (11), both ends are equipped with indent draw-in groove (111) around last mold core (21), the peripheral edge of flexible glue spare (4) is equipped with convex edge (41) of upwards extending, both ends upwards perk so that convex edge (41) at both ends around it can go up mold core (21) compound die extremely during lower mold core (11) block in indent draw-in groove (111).
2. A reverse hemming hot press forming die according to claim 1, characterized in that the lower die (1) comprises a die frame (12), the lower die core (11) is arranged in the die frame (12), and a mounting cavity (121) for setting the soft rubber member (4) is arranged between the lower die core (11) and the die frame (12).
3. The reverse-edging hot-press forming die according to claim 2, characterized in that a positioning cavity (122) is provided on the die frame (12), and positioning blocks (123) are provided on the front and rear sides of the positioning cavity (122) on the die frame (12).
4. A reverse hemming hot press forming die according to claim 3, wherein four corner positions of the positioning cavity (122) are provided with positioning notches (124), and each positioning notch (124) is provided with a positioning member (125).
5. The reverse-edging hot-press forming die according to claim 1, characterized in that the upper die (2) comprises an upper bottom plate (22) arranged on the upper die core (21), and limiting blocks (23) are arranged at the positions of the front, the rear, the left and the right of the bottom of the upper bottom plate (22).
6. The reverse-edging hot-press forming die according to claim 2, characterized in that the lower die (1) further comprises a lower bottom plate (13) arranged at the bottom of the die frame (12), a thimble (14) is arranged between the lower bottom plate (13) and the bottom of the lower die core (11), and a spring is sleeved on the thimble (14).
7. A reverse hemming hot press forming die according to any one of claims 1 to 3, characterized in that the flexible glue member (4) is made of PU material.
8. A film reverse edge-covering forming process is characterized by comprising the following steps:
a: the upper die is used for mounting the film (10) to be processed on the soft rubber piece (4), and positioning the film (10) through convex edges (41) at the front end and the rear end of the soft rubber piece (4) and four positioning pieces (125);
b: heating, wherein the heating device (3) moves to the upper part of the lower die (1) and heats and softens the film piece (10) arranged on the soft rubber piece (4), and the heating device (3) moves out after heating and softening;
c: closing the die, wherein the upper die core (21) presses the die downwards to the lower die core (11), so that the heated film piece (10) is pressed onto the soft rubber piece (4) and is bent into the shape the same as the upper surface of the soft rubber piece (4);
d: the upper mold core (21) continuously presses downwards to the lower mold core (11), so that the two ends of the soft rubber piece (4) deform and tilt inwards, convex edges (41) at the front end and the rear end of the soft rubber piece drive the front end and the rear end of the thin film piece (10) to be clamped into the inner concave clamping groove (111), and the thin film piece (10) is bent for the second time and is formed with a reverse wrapping edge;
and E, demolding, wherein the upper die (2) is separated from the lower die (1), so that the film piece (20) with the reverse edge wrapping is obtained.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210257367.6A CN114643670B (en) | 2022-03-16 | 2022-03-16 | Anti-edging hot-press forming die and thin film anti-edging forming process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210257367.6A CN114643670B (en) | 2022-03-16 | 2022-03-16 | Anti-edging hot-press forming die and thin film anti-edging forming process |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114643670A CN114643670A (en) | 2022-06-21 |
| CN114643670B true CN114643670B (en) | 2023-06-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210257367.6A Active CN114643670B (en) | 2022-03-16 | 2022-03-16 | Anti-edging hot-press forming die and thin film anti-edging forming process |
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| Country | Link |
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| CN (1) | CN114643670B (en) |
Citations (10)
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|---|---|---|---|---|
| US3601856A (en) * | 1969-08-05 | 1971-08-31 | Gen Tire & Rubber Co | Pressure seal for compression molding |
| EP0033116A2 (en) * | 1980-01-25 | 1981-08-05 | Kunststoffwerk Philippine GmbH & Co. KG | Method and apparatus for foaming in situ of soft-foam plastic sheets with hard foam plastics |
| JPH07299868A (en) * | 1994-05-03 | 1995-11-14 | Inoac Corp | Manufacturing method of products with skin |
| JPH08142059A (en) * | 1994-11-14 | 1996-06-04 | Toyoda Gosei Co Ltd | Resin product having skin layer and production thereof |
| JPH0952245A (en) * | 1995-08-10 | 1997-02-25 | Araco Corp | Production device for laminate |
| CN204585710U (en) * | 2015-01-08 | 2015-08-26 | 海门市中德电子发展有限公司 | In-mould injection part anti-package edge forming spring block |
| WO2018040825A1 (en) * | 2016-08-31 | 2018-03-08 | 江海波 | Soft rubber keyboard with hard sheet bonded to bottom portion thereof |
| CN109203332A (en) * | 2018-09-29 | 2019-01-15 | 安徽库伯密封技术有限公司 | A kind of adjustable sealing ring dies with epoxy compound |
| CN211917693U (en) * | 2019-12-31 | 2020-11-13 | 深圳市中诺通电子有限公司 | Pneumatic bending device of flexible circuit board for wearable equipment |
| CN113442418A (en) * | 2021-08-31 | 2021-09-28 | 宁波均胜群英汽车系统股份有限公司 | Plastic suction mould structure |
-
2022
- 2022-03-16 CN CN202210257367.6A patent/CN114643670B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3601856A (en) * | 1969-08-05 | 1971-08-31 | Gen Tire & Rubber Co | Pressure seal for compression molding |
| EP0033116A2 (en) * | 1980-01-25 | 1981-08-05 | Kunststoffwerk Philippine GmbH & Co. KG | Method and apparatus for foaming in situ of soft-foam plastic sheets with hard foam plastics |
| JPH07299868A (en) * | 1994-05-03 | 1995-11-14 | Inoac Corp | Manufacturing method of products with skin |
| JPH08142059A (en) * | 1994-11-14 | 1996-06-04 | Toyoda Gosei Co Ltd | Resin product having skin layer and production thereof |
| JPH0952245A (en) * | 1995-08-10 | 1997-02-25 | Araco Corp | Production device for laminate |
| CN204585710U (en) * | 2015-01-08 | 2015-08-26 | 海门市中德电子发展有限公司 | In-mould injection part anti-package edge forming spring block |
| WO2018040825A1 (en) * | 2016-08-31 | 2018-03-08 | 江海波 | Soft rubber keyboard with hard sheet bonded to bottom portion thereof |
| CN109203332A (en) * | 2018-09-29 | 2019-01-15 | 安徽库伯密封技术有限公司 | A kind of adjustable sealing ring dies with epoxy compound |
| CN211917693U (en) * | 2019-12-31 | 2020-11-13 | 深圳市中诺通电子有限公司 | Pneumatic bending device of flexible circuit board for wearable equipment |
| CN113442418A (en) * | 2021-08-31 | 2021-09-28 | 宁波均胜群英汽车系统股份有限公司 | Plastic suction mould structure |
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| CN114643670A (en) | 2022-06-21 |
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