Hardware and silica gel laminating forming equipment
By using a protective film on the substrate surface to form injection points and overflow points, the problem of overflowing adhesive scratching the substrate during LSR injection molding is solved, achieving surface protection and quality improvement of the finished product.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- DONGGUAN JIEYING PRECISION SILICONE TECH CO LTD
- Filing Date
- 2025-05-19
- Publication Date
- 2026-05-01
AI Technical Summary
In the existing LSR injection molding process, excess adhesive can easily scratch the non-injection areas of the substrate, affecting the appearance of the finished product and the yield rate.
Using hardware and silicone film coating molding equipment, a protective film is used to form injection positions and overflow positions on the surface of the substrate. Excess glue overflows into the overflow positions. After injection molding, the overflow glue adheres to the surface of the protective film, and the substrate is not scratched during cleaning.
It effectively protects the substrate surface from scratches, improves finished product quality and yield, and avoids damage to the substrate appearance during the cleaning process.
Smart Images
Figure CN224183564U_ABST
Abstract
Description
A hardware and silicone coating molding equipment Technical Field
[0001] This utility model belongs to the field of injection molds, specifically relating to a hardware and silicone coating molding equipment. Background Technology
[0002] Liquid silicone rubber, also known as LSR, is a liquid form of rubber. It is a type of silicone rubber distinct from compounded semi-solid silicone rubber and common room-temperature vulcanizing (LTV) single-component silicone rubber. This type of rubber exhibits good flowability, rapid vulcanization, and can be cast or injection molded, and is widely used in two-color injection molding. Injection-molded sealing parts have high dimensional accuracy, good consistency, and stable sealing function, and are widely used in automotive, aerospace, home appliances, medical, and other industries. However, existing LSR injection molding processes can result in overflow. In two-color injection molding, the hot-melt LSR is injected into the mold cavity within the injection area of the substrate. During this process, LSR may overflow into non-injection areas of the substrate, forming overflow. Cleaning the overflow after injection molding can easily scratch these non-injection areas, leading to an unsightly finished product and affecting the yield rate. Summary of the Invention
[0003] (1) Technical problems to be solved
[0004] This utility model provides a hardware and silicone coating molding equipment, which aims to solve the problem that when cleaning excess glue after injection molding, it is easy to scratch the non-injection molded area of the substrate, resulting in an unsightly finished product surface and affecting the yield of finished products.
[0005] (2) Technical solution
[0006] This utility model provides a hardware and silicone coating molding equipment for injection molding an LSR layer on the surface of a substrate. The equipment includes a front mold, a rear mold, and a protective film. The substrate has several through-holes. The front mold and the rear mold are provided with a first injection groove and a second injection groove for limiting and fixing the upper and lower sides of the substrate. Both the first and second injection grooves have pillars corresponding to the holes. The first injection groove has a recessed cavity formed around the pillar. The protective film is detachably attached to one side of the substrate surface and has several windows and overflow areas formed around each window. Each window surrounds the edge of the corresponding pillar and forms an injection position with the pillar edge.
[0007] The protective film is attached to one side of the substrate and the substrate is installed between the first injection groove and the second injection groove. During injection molding, glue is injected into the injection cavity to form the injection mold in the injection cavity and each of the injection positions. Excess glue overflows into the overflow position.
[0008] Preferably, each of the circular holes corresponds to two of the pillars, which are respectively disposed on the upper and lower sides of the circular hole. After the front mold and the rear mold are closed, the pillars located on the upper and lower sides of the circular hole come into contact and abut against each other, and the pillars and the inner wall of the corresponding circular hole form a gap that communicates with the injection cavity.
[0009] Preferably, the circular holes on the substrate form a partition, and each window is connected at a corresponding position located at each partition.
[0010] Preferably, a first injection molding area is provided on the substrate, and a separator is provided in each of the separation positions located in the first injection molding area for separating two adjacent circular holes.
[0011] Preferably, the substrate is further provided with a second injection area adjacent to the first injection area, and each of the partitions in the second injection area is provided with a connection port for communication between two adjacent circular holes.
[0012] Preferably, each of the columns located in the second injection groove and corresponding to the second injection area has a guide position that communicates with the injection cavity. The side wall of the column in this position forms an inclined limiting surface. The limiting surface presses against the circular hole of the substrate located in the second injection area, and forms a cavity between the substrate and the second injection area.
[0013] Preferably, the two sides of the separator form gaps that communicate with the injection cavity between them and the corresponding columns.
[0014] Preferably, the column disposed in the second injection molding groove includes an annular wall and an installation cavity formed in the annular wall. The substrate includes an outer annular piece and an inner circular piece coaxially disposed in the outer annular piece. There is a gap between the outer annular piece and the inner circular piece with a width greater than the width of the annular wall for filling hot melt LSR during injection molding. The protective film includes an outer ring piece (34) and an inner ring piece that are detachably attached to the surfaces of the outer annular piece and the inner circular piece, respectively. Positioning support members are provided at the bottom of the second injection molding groove 2 and at the bottom of the installation cavity. The positioning support members are used to support the inner circular piece.
[0015] Preferably, the front mold is provided with an injection port, which extends through the front mold into the first injection groove.
[0016] Preferably, the thickness of the protective film is 0.05 mm.
[0017] Compared with the prior art, the beneficial effects of this utility model are as follows:
[0018] The protective film is attached to one side of the substrate surface, so that the windows on the protective film surround the outer edges of the round holes on the substrate and form injection positions. The substrate is placed in the first injection groove of the front mold, and the front mold and rear mold are closed, so that the corresponding pillars of the first and second injection grooves abut against each other, and the injection cavities on both sides of the substrate are connected. During injection molding, glue is injected into the injection cavity, and the hot melt LSR fills the injection cavity and injection position to form the finished product. In order to ensure that the injection cavity and injection position are fully filled, an excess of glue will be injected. At this time, glue overflow will occur at the injection position to the surface of the protective film. After the injection is completed, the finished product is removed. At this time, the glue overflow generated during the injection process adheres to the surface of the protective film and does not adhere to the surface of the substrate. When using tools to cut and clean the glue overflow, there is a protective film between the tool and the substrate to protect the substrate from being scratched during the cleaning process. After cleaning, the protective film can be peeled off to avoid damage to the appearance of the substrate. Attached Figure Description
[0019] Figure 1 is an exploded perspective view of some embodiments of this utility model.
[0020] Figure 2 is a schematic diagram of the structure of the protective film attached to the substrate in some embodiments of this utility model.
[0021] Figure 3 shows the usage state of the substrate after injection molding and removal of the protective film in some embodiments of this utility model.
[0022] Figure 4 is a cross-sectional view of the first injection zone of the substrate in the injection molding state in some embodiments of this utility model.
[0023] Figure 5 is a cross-sectional view of the second injection zone of the substrate in the injection molding state in some embodiments of this utility model.
[0024] Figure 6 is an exploded perspective view of some other embodiments of this utility model.
[0025] Figure 7 is a schematic diagram of the structure of the protective film attached to the substrate in some other embodiments of this utility model.
[0026] Figure 8 shows the usage state of the substrate after injection molding and removal of the protective film in some other embodiments of this utility model.
[0027] Figure label:
[0028] 1-Front mold, 10-Base material, 101-LSR layer, 102-Round hole, 103-Separator, 104-Outer ring piece, 105-Inner ring piece, 11-First injection groove, 12-Molding part, 13-Injection port, 2-Rear mold, 20-Injection cavity, 21-Second injection groove, 211-Ring wall, 212-Mounting cavity, 213-Positioning support, 3-Protective film, 30-Column, 301-Guide position, 302-Limiting surface, 303-Gap, 31-Window, 32-Overflow position, 33-Injection position, 34-Outer ring piece, 35-Inner ring piece, 4-First injection area, 5-Second injection area, 51-Connecting port, 52-Cavity. Detailed Implementation
[0029] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.
[0030] As shown in Figures 1-8, this utility model provides a hardware and silicone film coating molding equipment for injection molding an LSR layer 101 on the surface of a substrate 10. The equipment includes a front mold 1, a rear mold 2, and a protective film 3. The substrate 10 has a plurality of circular holes 102. The front mold 1 and the rear mold 2 are provided with a first injection groove 11 and a second injection groove 21 for limiting and fixing the upper and lower sides of the substrate 10. The first injection groove 11 and the second injection groove 21 are each provided with a column 30 corresponding to each of the circular holes 102, and a molding cavity 20 is formed by recessing around the column 30. The protective film 3 is detachably attached to one side of the substrate 10 and is provided with a plurality of windows 31 and an overflow position 32 formed around each of the windows 31. Each window 31 surrounds the edge of the corresponding column 30 and forms an injection position 33 between the window 31 and the edge of the column 30.
[0031] The protective film 3 is attached to one side of the substrate 10 and the substrate 10 is installed between the first injection groove 11 and the second injection groove 21. During injection molding, glue is injected into the injection cavity 20 to form the injection cavity 20 and each of the injection positions 33. Excess glue overflows into the overflow position 32.
[0032] Furthermore, as shown in Figures 4 and 5, each of the circular holes 102 corresponds to two pillars 30, and the two pillars 30 are respectively disposed on the upper and lower sides of the circular hole 102. After the front mold 1 and the rear mold 2 are closed, the pillars 30 located on the upper and lower sides of the circular hole 102 come into contact and abut against each other. The pillars 30 and the inner wall of the corresponding circular hole 102 form a gap 303 that communicates with the injection cavity 20.
[0033] Specifically, the protective film 3 is attached to one side of the substrate 10, so that each window 31 on the protective film 3 surrounds the outer edge of each round hole 102 on the substrate 10 and forms an injection position 33. The substrate 10 is placed in the first injection groove 11 of the front mold 1, and the front mold 1 and the rear mold 2 are closed, so that each corresponding column 30 of the first injection groove 11 and the second injection groove 21 abuts, so that the outer wall of each column 30 and the inner wall of the corresponding round hole 102 on the substrate 10 form a gap 303. One side of the gap 303 is connected to the injection cavity 20 in the first injection groove 11, and the other side is connected to the second injection groove 21, so that the injection cavity 20 in the first injection groove 11 and the second injection groove 21 are connected.
[0034] Furthermore, as shown in Figures 2 and 3, partitions are formed between the circular holes 102 on the substrate 10, and each window 31 is connected at its corresponding position within each partition. A first injection molding area 4 is provided on the substrate 10, and a partition 103 is provided within each partition within the first injection molding area 4 to separate adjacent circular holes 102. A second injection molding area 5 is also provided on the substrate 10 adjacent to the first injection molding area 4, and a connection port 51 is provided within each partition within the second injection molding area 5 to connect adjacent circular holes 102. Gaps 303, communicating with the injection cavity 20, are formed between the two sides of the partition 103 and the corresponding column 30.
[0035] Specifically, the substrate 10 is further provided with a first injection molding area 4 and a second injection molding area 5. The second injection molding area 5 has a plurality of circular holes 102, and adjacent circular holes 102 in this area are connected by a separator. The depth of the circular holes 102 in this area is the same as the thickness of the substrate 10. The protective film 3 is provided with a partition corresponding to the second injection molding area 5. The window 31 in the partition includes a plurality of window holes corresponding to the circular holes 102 in the second injection molding area 5, and adjacent window holes in the partition are connected to each other. The connection position is connected to the separator. The positions correspond; before injection molding, the front mold 1 and the rear mold 2 are closed, so that the corresponding pillars 30 of the first injection groove 11 and the second injection groove 21 abut against each other, and the gap 303 formed between the outer wall of each pillar 30 and the inner wall of the corresponding round hole 102 on the substrate 10 is connected to the injection cavity 20. During injection molding, injection molding is performed into the injection cavity 20 and the injection position 33. At this time, in addition to filling the injection cavity 20, the gap 303 and the injection position 33, the hot melt LSR also injects into the partition position to achieve the injection molding effect.
[0036] Furthermore, as shown in Figure 5, each of the columns 30 located within the second injection molding groove 21 and corresponding to the second injection molding area 5 has a guide position 301 communicating with the injection molding cavity 20. The sidewall of the column 30 at this position forms an inclined limiting surface 302, which presses against the circular hole 102 of the substrate 10 located within the second injection molding area 5, forming a cavity 52 between the substrate 10 and the second injection molding area 5. The two sides of the separator 103 respectively form gaps 303 communicating with the injection molding cavity 20 between themselves and the corresponding columns 30.
[0037] Specifically, in some embodiments, the substrate 10 is made of plastic. The substrate 10 is placed in the second injection groove 21 of the rear mold 2. At this time, one end of each round hole 102 of the substrate 10 in the second injection area 5 is fixed to the limiting surface 302 of the corresponding main body, and the substrate 10 covers the injection cavity 20 in the second injection groove 21. After the front mold 1 and the rear mold 2 are closed, the side of the substrate 10 located in the first injection groove 11 abuts against the inside of the first injection groove 11. During injection, the substrate 10 is injected into the injection cavity 20. At this time, the hot melt LSR first enters the injection cavity 20 between the substrate 10 and the second injection groove 21. The hot melt LSR passes through the round hole 102 of the first injection area 4 on the substrate 10 and the corresponding main body. The gap 303 flows into the injection cavity 20 corresponding to the first injection area 4 in the first injection groove 11. Finally, the hot-melted LSR completely covers the injection position 33 and the separator 103 of the substrate 10 in the first injection area 4 and completely fills the injection cavity 20 corresponding to the second injection area 5 in the first injection groove 11. At the same time, after the hot-melted LSR fills the guide position 301 in the injection cavity 20 in the second injection area 5, it flows through the connection port 51 into the injection cavity 20 corresponding to the second injection area 5 in the first injection groove 11. Finally, the hot-melted LSR completely covers the injection position 33 of the substrate 10 in the second injection area 5 and completely fills the injection cavity 20 corresponding to the second injection area 5 in the first injection groove 11 to achieve the injection molding effect.
[0038] Further, as shown in Figures 6-8, the column 30 disposed in the second injection molding groove 21 includes an annular wall 211 and a mounting cavity 212 formed in the annular wall 211. The substrate 10 includes an outer annular piece 104 and an inner circular piece 105 coaxially disposed in the outer annular piece 104. There is a gap between the outer annular piece 104 and the inner circular piece 105 with a width greater than the width of the annular wall 211, which is used to fill the hot melt LSR during injection molding. The protective film 3 includes an outer ring piece 34 and an inner ring piece 35 that are detachably attached to the surfaces of the outer annular piece 104 and the inner circular piece 105, respectively. Positioning support members 213 are provided at the bottom of the second injection molding groove 21 and the bottom of the mounting cavity 212. The positioning support members 213 are used to support the inner circular piece 105. Specifically, in some embodiments, the substrate 10 is made of metal and is divided into an outer ring piece 104 and an inner circular piece 105, with a gap between the outer ring piece 104 and the inner circular piece 105. An outer ring piece 34 surrounds the gap between the outer ring piece 104 and the inner circular piece 105 and is fitted to one side of the outer ring piece 104. In this case, the injection molding position 33 is formed between the inner edges of the outer ring piece 34 and the outer ring piece 104. The inner ring piece 35 is coaxial with and fitted to the inner circular piece 105. On one side of the circular piece 105, the injection position 33 is formed between the outer edge of the inner ring piece 35 and the outer edge of the inner circular piece 105. The positioning support 213 located in the second injection groove 21 is diagonally symmetrically arranged. When installing the outer ring piece 104, the outer ring piece is placed on the positioning support 213 in the second injection groove 21. The positioning support 213 located in the mounting cavity 212 includes a support ring and a support platform, wherein the support ring is coaxial and fitted to the inner side of the ring wall 211. The support platform and the support ring are coaxial and fixedly installed in the middle of the bottom surface of the mounting cavity 212. When installing the inner circular piece 105, the inner circular piece 105 is placed in the mounting cavity 212 and supported by the positioning support 213. After installation, the ring wall 211 is located in the gap between the outer ring piece 104 and the inner circular piece 105. After the front mold 1 and the rear mold 2 are closed, the injection cavity 20 located in the first injection groove 11 covers the surface of the injection position 33. During injection, the injection is injected into the injection cavity 20 through the injection port 13. The hot melt LSR is injected through the injection cavity 20 and sequentially fills the gap between the outer ring piece 104 and the inner circular piece 105. The injection position 33 is finally filled into the injection cavity 20 to form the finished product. The outer ring piece 104 and the inner circular piece 105 are connected by LSR. At this time, a small amount of overflow glue covers the overflow glue position 32 of the protective film 3. When cutting and cleaning the overflow glue, it can avoid scratching the substrate 10, improve product quality, and reduce the defect rate.
[0039] Furthermore, the front mold 1 is provided with an injection port 13, which extends through the front mold 1 into the first injection groove 11. Specifically, the first end of the injection port 13 opens outward through the front mold 1, and the last end of the injection port 13 communicates with the injection cavity 20 in the first injection groove 11 corresponding to the first injection area 4, or communicates with the injection cavity 20 in the first injection groove 11 corresponding to the second injection area 5, thereby achieving the injection molding effect.
[0040] Furthermore, the thickness of the protective film 3 is 0.05 mm. Specifically, the thinner the protective film 3, the less it affects the sealing performance after the front mold 1 and rear mold 2 are closed after being attached to the substrate 10. Under the premise of ensuring injection molding quality, it can better remove and clean excess glue, thereby improving product quality.
[0041] The following is a detailed explanation of the working principle of this utility model;
[0042] The protective film 3 is attached to one side surface of the substrate 10, so that each window 31 on the protective film 3 surrounds the outer edge of each circular hole 102 on the substrate 10 and forms an injection position 33. The substrate 10 is placed in the first injection groove 11 of the front mold 1, and the front mold 1 and the rear mold 2 are closed, so that the corresponding pillars 30 of the first injection groove 11 and the second injection groove 21 abut against each other, and the injection cavities 20 located on both sides of the substrate 10 are connected. During injection molding, the injection cavity 20 is injected with resin, so that the hot melt LSR fills the injection cavity 20 and the injection position 33 to form a molded product. In order to ensure that the injection cavity 20 and injection position 33 are fully filled, an excessive amount of glue will be injected. At this time, glue overflow will occur in the glue overflow position 32 on the surface of the protective film 3 at the injection position 33. After the injection is completed, the finished product is taken out. At this time, the glue overflow generated during the injection process adheres to the surface of the protective film 3 and does not adhere to the surface of the substrate 10. When using tools to cut and clean the glue overflow, there is a protective film 3 between the tool and the substrate 10, which can protect the substrate 10 from being scratched during the cleaning process. After the cleaning is completed, the protective film 3 can be removed to avoid damage to the appearance of the substrate 10.
[0043] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style of the specification is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other implementations that can be understood by those skilled in the art.
[0044] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.
Claims
1. A hardware and silicone coating molding equipment for injection molding an LSR layer (101) on the surface of a substrate (10), characterized in that: The system includes a front mold (1), a rear mold (2), and a protective film (3). A substrate (10) has several through holes (102). The front mold (1) and the rear mold (2) are provided with a first injection groove (11) and a second injection groove (21) for limiting and fixing the upper and lower sides of the substrate (10). Both the first injection groove (11) and the second injection groove (21) are provided with pillars (30) corresponding to each of the through holes (102). The first injection groove (11) has a recessed cavity (20) surrounding the pillars (30). The protective film (3) is detachably attached to one side of the substrate (10) and is provided with… There are several windows (31) and overflow positions (32) formed around each of the windows (31). Each window (31) surrounds the edge of the corresponding column (30) and forms an injection position (33) between the window (31) and the edge of the column (30). The protective film (3) is attached to one side surface of the substrate (10) and the substrate (10) is installed between the first injection groove (11) and the second injection groove (21). During injection molding, glue is injected into the injection cavity (20) so that the injection cavity (20) and each of the injection positions (33) are injection molded. Excess glue overflows into the overflow position (32).
2. The hardware and silicone coating molding equipment according to claim 1, characterized in that: Each of the circular holes (102) has two pillars (30) corresponding to it. The two pillars (30) are respectively disposed on the upper and lower sides of the circular hole (102). After the front mold (1) and the rear mold (2) are closed, the pillars (30) located on the upper and lower sides of the circular hole (102) come into contact and abut against each other. The pillars (30) and the inner wall of the corresponding circular hole (102) form a gap (303) that communicates with the injection cavity (20).
3. The hardware and silicone coating molding equipment according to claim 1, characterized in that: Separation positions are formed between the circular holes (102) on the substrate (10), and each window (31) is connected at the corresponding position of each separation position.
4. The hardware and silicone coating molding equipment according to claim 3, characterized in that: A first injection molding area (4) is provided on the substrate (10), and a separator (103) is provided in each of the separation positions located in the first injection molding area (4) for separating two adjacent circular holes (102).
5. The hardware and silicone coating molding equipment according to claim 4, characterized in that: The substrate (10) is also provided with a second injection area (5) adjacent to the first injection area (4). Each of the partitions in the second injection area (5) is provided with a connection port (51) for communication between two adjacent round holes (102).
6. The hardware and silicone coating molding equipment according to claim 5, characterized in that: Each of the columns (30) located in the second injection groove (21) and corresponding to the second injection area (5) has a guide position (301) that communicates with the injection cavity (20). The side wall of the column (30) in this position has an inclined limiting surface (302). The limiting surface (302) presses against the round hole (102) of the substrate (10) located in the second injection area (5) and forms a cavity (52) between the substrate (10) and the second injection area (5).
7. The hardware and silicone coating molding equipment according to claim 4, characterized in that: The two sides of the separator (103) respectively form a gap (303) that communicates with the injection cavity (20) between them and the corresponding column (30).
8. The hardware and silicone coating molding equipment according to claim 1, characterized in that: The column (30) disposed in the second injection groove (21) includes an annular wall (211) and an installation cavity (212) formed in the annular wall (211). The substrate (10) includes an outer ring plate (104) and an inner circular plate (105) coaxially disposed in the outer ring plate (104). There is a gap between the outer ring plate (104) and the inner circular plate (105) with a width greater than the width of the annular wall (211) for filling hot melt LSR during injection molding. The protective film (3) includes an outer ring plate (34) and an inner ring plate (35) that are detachably attached to the surfaces of the outer ring plate (104) and the inner circular plate (105), respectively. The bottom of the second injection groove (21) and the bottom of the installation cavity (212) are provided with positioning support members (213), which are used to support the inner circular plate (105).
9. The hardware and silicone coating molding equipment according to claim 1, characterized in that: The front mold (1) is provided with an injection port (13), which extends through the front mold (1) into the first injection groove (11).
10. The hardware and silicone coating molding equipment according to claim 1, characterized in that: The thickness of the protective film (3) is 0.05 mm.