Injection molding mold for silica gel gasket

Abstract

The utility model discloses a silica gel gasket injection molding mold in the field of molds, which comprises an upper mold and a lower mold which are used for liquid injection molding of silica gel gaskets, the upper mold is positioned above the lower mold, one end of the upper mold is tightly attached to one end of the lower mold by moving the upper mold, the lower mold is provided with a lower mold molding plate, and the upper mold is provided with an upper mold molding plate matched with the lower mold molding plate. The upper mold forming plate and the lower mold forming plate are synchronously attached along with attachment of the upper mold and the lower mold, the upper mold forming plate and the lower mold forming plate are provided with communicated liquid injection forming cavities, the lower mold forming plate is further provided with auxiliary grooves communicated with the liquid injection forming cavities, one end of the upper mold is provided with a liquid injection channel communicated with the liquid injection forming cavities, and the other end of the upper mold is provided with a liquid outlet channel communicated with the liquid injection forming cavities. A telescopic ejector rod ejected from the bottom of the auxiliary groove is installed in the lower mold, demolding is convenient, a heat dissipation space which is hollowed out, exposes the bottom of the lower mold forming plate and is communicated in the side face is formed in the lower mold, an air nozzle installed in the heat dissipation space is further arranged in the lower mold, and the air nozzle blows air towards the bottom of the lower mold forming plate to be used for reducing the temperature of the lower mold forming plate, and heat dissipation is rapid.

Description

Technical Field

[0001] The utility model relates to the technical field of molds, in particular to an injection molding mold for a silicone gasket. Background Art

[0002] Silicone gaskets are a type of product with relatively high market demand among silicone products. They have certain tension, flexibility, excellent insulation, pressure resistance, high temperature resistance, low temperature resistance, stable chemical properties, environmental protection, safety, no peculiar smell. Food-grade silicone gaskets are non-toxic and odorless, insoluble in water and any solvent, and are a highly active green product. They are usually produced by injection molding.

[0003] When a silicone gasket is injection molded, a corresponding mold for forming after injection is required. However, when the existing molds for injection molding are used to remove the formed product after the silicone gasket is formed, basically, the product is slowly lifted out by fingers at the edge of the forming cavity. If the product fits too tightly with the forming cavity, it is difficult to remove the product, and a large amount of time needs to be wasted. In addition, after the silicone gasket is formed, it needs to be cooled. Currently, the cooling method cannot disperse or quickly spread the heat accumulated inside the mold, and the overall heat dissipation speed is slow, affecting the cooling effect. Summary of the Utility Model

[0004] In order to overcome the deficiencies of the prior art solutions, the utility model provides an injection molding mold for a silicone gasket, which can effectively solve the technical problems of difficult demolding and slow heat dissipation of the current mold.

[0005] The technical solution adopted by the utility model to solve its technical problems is as follows:

[0006] An injection molding mold for a silicone gasket includes an upper mold and a lower mold for injecting and forming the silicone gasket. The upper mold is located above the lower mold, and one end of the upper mold and the lower mold are tightly fitted by moving the upper mold.

[0007] The lower mold is provided with a lower mold forming plate, and the upper mold is provided with an upper mold forming plate matching the lower mold forming plate. The upper mold forming plate and the lower mold forming plate are synchronously fitted when the upper mold and the lower mold are fitted. The upper mold forming plate and the lower mold forming plate are provided with a communicating injection molding cavity. The lower mold forming plate is further provided with a secondary groove communicating with the injection molding cavity. One end of the upper mold is provided with an injection channel communicating with the injection molding cavity, so that the injected liquid flows from the injection channel to the injection molding cavity and the secondary groove. A telescopic ejector rod is installed inside the lower mold and ejects from the bottom of the secondary groove. The telescopic ejector rod is used to eject upward the silicone material injection molded in the secondary groove.

[0008] Inside the lower mold, there is a hollow heat dissipation space that exposes the bottom of the lower mold forming plate. The heat dissipation space is also connected to the outside of the lower mold. Inside the lower mold, there is also an air nozzle installed in the heat dissipation space. The air nozzle blows air towards the bottom of the lower mold forming plate to reduce the temperature of the lower mold forming plate.

[0009] Further, at one end of the lower mold close to the upper mold, there is a downwardly concave guide groove. The upper mold is provided with a downwardly protruding guide rod. The guide rod is inserted into the guide groove and moves therein, enabling the upper mold to move downward along the guide groove towards the lower mold.

[0010] Further, at one end of the upper mold close to the lower mold, there is an anti-slip layer attached. The anti-slip layer is attached to the lower mold synchronously with the upper mold to prevent the upper mold and the lower mold from moving after being attached.

[0011] Further, the upper mold is provided with an upper mold forming plate installation groove that is recessed for installing the upper mold forming plate. After the upper mold forming plate is installed in the upper mold forming plate installation groove, it is detachable and aligned with the upper mold horizontal plane. The lower mold is provided with a lower mold forming plate installation groove that is recessed for installing the lower mold forming plate. The lower mold forming plate installation groove is connected to the heat dissipation space. After the lower mold forming plate is installed in the lower mold forming plate installation groove, it is detachable and aligned with the lower mold horizontal plane.

[0012] Further, the air nozzle is installed at the bottom of the heat dissipation space, and there is a joint on the side of the lower mold that is connected to the air nozzle.

[0013] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0014] After the lower mold forming plate and the upper mold forming plate of the present utility model are attached, a secondary groove that is connected to the injection molding cavity is added. The rubber material in the secondary groove is ejected by the internal telescopic ejector rod, facilitating the user to demold the silicone gasket. At the same time, an air nozzle for blowing air towards the lower mold forming plate is added inside the lower mold to accelerate the cooling of the lower mold, accelerate the internal air circulation, and thus accelerate the cooling speed of the injection-molded silicone gasket. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a schematic connection diagram of the overall structure of an embodiment of the present utility model;

[0016] Figure 2 is a schematic diagram of the upper mold structure of an embodiment of the present utility model;

[0017] Figure 3 is a schematic diagram of the internal structure of the upper mold of an embodiment of the present utility model;

[0018] Figure 4 is a schematic diagram of the lower mold structure of an embodiment of the present utility model;

[0019] Figure 5 is an embodiment of the present utility model Figure 4Schematic enlarged view of part A;

[0020] Figure 6 Schematic internal structure view of the lower mold in the embodiment of the present utility model;

[0021] Figure 7 Schematic internal cross-sectional structure view of the lower mold in the embodiment of the present utility model;

[0022] Reference numerals in the figure:

[0023] 1 - upper mold, 2 - lower mold, 3 - lower mold forming plate, 4 - upper mold forming plate, 5 - liquid injection forming cavity, 6 - auxiliary groove, 7 - liquid injection channel, 8 - telescopic ejector rod, 9 - heat dissipation space, 10 - air nozzle, 11 - guide groove, 12 - guide rod, 13 - anti-slip layer, 14 - upper mold forming plate installation groove, 15 - lower mold forming plate installation groove, 16 - joint. Specific implementation mode

[0024] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

[0025] As Figure 1-7 shown, the present technical solution provides a silicone gasket injection molding die, which is mainly used for liquid injection molding production of silicone gaskets. Its structure mainly consists of two parts: an upper mold 1 and a lower mold 2. The upper mold 1 is located above the lower mold 2. One end of the upper mold 1 and the lower mold 2 is tightly attached by moving the upper mold 1. After the upper mold 1 and the lower mold 2 are attached, a silicone gasket can be formed by injecting liquid into the interior.

[0026] A downwardly concave guide groove 11 is provided at one end of the lower mold 2 close to the upper mold 1, and an upwardly protruding guide rod 12 is provided on the upper mold 1. The guide rod 12 is inserted into the guide groove 11 and moves therein, so that the upper mold 1 moves downward along the guide groove 11 towards the lower mold 2. When the upper mold 1 and the lower mold 2 are attached, after the guide rod 12 is inserted into the guide groove 11, it guides the moving direction of the upper mold 1 until the upper mold 1 accurately contacts the lower mold 2. In addition, in order to prevent the upper mold 1 and the lower mold 2 from moving relative to each other after contact and affecting liquid injection, an anti-slip layer 13 is attached to one end of the upper mold 1 close to the lower mold 2. The anti-slip layer 13 is attached to the lower mold 2 synchronously with the upper mold 1, and is used to prevent the upper mold 1 and the lower mold 2 from moving after being attached, further strengthening the position between the upper mold 1 and the lower mold 2.

[0027] The lower mold 2 is installed with a lower mold forming plate 3, and the upper mold 1 is installed with an upper mold forming plate 4 that matches the lower mold forming plate 3. The upper mold forming plate 4 and the lower mold forming plate 3 are synchronously fitted when the upper mold 1 and the lower mold 2 are fitted. The upper mold forming plate 4 and the lower mold forming plate 3 are provided with a communicating liquid injection forming cavity 5. When the upper mold 1 moves downward and fits with one end of the lower mold 2, a washer-shaped liquid injection forming cavity 5 is formed inside. When the user injects hot-melt silicone liquid into the liquid injection forming cavity 5, a silicone washer product can be formed after cooling.

[0028] The lower mold forming plate 3 is also provided with a secondary groove 6 that communicates with the liquid injection forming cavity 5. One end of the upper mold 1 is provided with a liquid injection channel 7 that communicates with the liquid injection forming cavity 5, so that the injected liquid flows from the liquid injection channel 7 to the liquid injection forming cavity 5 and the secondary groove 6. During liquid injection, the user can inject hot-melt silicone liquid through the liquid injection channel 7 until the liquid simultaneously flows to and fills the liquid injection forming cavity 5 and the secondary groove 6. The silicone in the secondary groove 6 will be ejected to facilitate the user to demold the silicone washer from the mold. The user can pull out the silicone in the secondary groove 6 and synchronously drive the silicone washer in the liquid injection forming cavity 5.

[0029] A telescopic ejector rod 8 that ejects from the bottom of the secondary groove 6 is installed inside the lower mold 2. The telescopic ejector rod 8 is used to eject upward the silicone material formed by liquid injection in the secondary groove 6. After liquid injection molding, the silicone in the secondary groove 6 is ejected by the telescopic ejector rod 8 inside the lower mold 2, and the user can quickly demold the silicone washer through the silicone at this position.

[0030] A heat dissipation space 9 that is hollow and exposes the bottom of the lower mold forming plate 3 is provided inside the lower mold 2. The heat dissipation space 9 also communicates with the outside of the lower mold 2. An air nozzle 10 installed in the heat dissipation space 9 is also provided inside the lower mold 2. The air nozzle 10 blows air toward the bottom of the lower mold forming plate 3 to reduce the temperature of the lower mold forming plate 3. After liquid injection molding, in order to quickly achieve cooling, an air nozzle 10 that blows air toward the lower mold forming plate 3 is provided inside the lower mold 2. There are four air nozzles 10, which are installed at the bottom of the heat dissipation space 9 and jointly blow air toward the lower mold forming plate 3 for temperature reduction treatment. A joint 16 connected to the air nozzle 10 is provided on the side of the lower mold 2, and after being connected to an external device that supplies gas through the joint 16, gas is supplied to the air nozzle 10.

[0031] In addition, it should be supplemented and explained that this mold can be used by the user for injection molding silicone washers of different sizes. The user can replace the upper mold forming plate 4 and install the lower mold forming plate 3. Specifically, the upper mold 1 is provided with an upper mold forming plate installation groove 14 that is recessed for installing the upper mold forming plate 4. After the upper mold forming plate 4 is installed in the upper mold forming plate installation groove 14, it is detachable and aligned with the horizontal plane of the upper mold 1; the lower mold 2 is provided with a lower mold forming plate installation groove 15 that is recessed for installing the lower mold forming plate 3. The lower mold forming plate installation groove 15 communicates with the heat dissipation space 9. After the lower mold forming plate 3 is installed in the lower mold forming plate installation groove 15, it is detachable and aligned with the horizontal plane of the lower mold 2.

[0032] Compared with the traditional technology, after the lower die forming plate 3 and the upper die forming plate 4 are fitted in this technical solution, a secondary groove 6 communicated with the injection molding cavity 5 is added. The rubber material in the secondary groove 6 is ejected by the internal telescopic ejector rod 8, which facilitates the user to demold the silicone gasket. At the same time, a nozzle 10 for blowing air to the lower die forming plate 3 is added in the lower die 2 to accelerate the cooling of the lower die 2 and accelerate the internal air circulation, thereby accelerating the cooling speed of the injection-molded silicone gasket.

[0033] For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above exemplary embodiments, and the present utility model can be implemented in other specific forms without departing from the spirit or basic characteristics of the present utility model. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present utility model is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be embraced within the present utility model, and any reference signs in the claims should not be regarded as limiting the claims involved.

Claims

1. A silicone gasket injection molding mold, comprising an upper mold and a lower mold for liquid injection molding of silicone gaskets, wherein the upper mold is located above the lower mold, and one end of the upper mold and the lower mold are tightly fitted by moving the upper mold, characterized in that: The lower mold is provided with a lower mold forming plate, the upper mold is provided with an upper mold forming plate matching the lower mold forming plate, the upper mold forming plate and the lower mold forming plate are synchronously fitted when the upper mold and the lower mold are fitted, the upper mold forming plate and the lower mold forming plate are provided with a liquid injection molding cavity that is connected, the lower mold forming plate is also provided with a sub-groove that is connected with the liquid injection molding cavity, one end of the upper mold is provided with a liquid injection channel that is connected with the liquid injection molding cavity, so that the injection liquid flows from the liquid injection channel to the liquid injection molding cavity and the sub-groove, and a telescopic ejector rod that is ejected from the bottom of the sub-groove is installed in the lower mold, and the telescopic ejector rod is used to eject the silicone material that is injection-molded in the sub-groove upward; The lower mold is provided with a heat dissipation space which is hollowed out and exposes the bottom of the lower mold forming plate. The heat dissipation space is also connected to the outer side of the lower mold. The lower mold is also provided with an air nozzle installed in the heat dissipation space. The air nozzle blows air toward the bottom of the lower mold forming plate to reduce the temperature of the lower mold forming plate.

2. The silicone gasket injection molding mold according to claim 1, characterized in that: The lower die is provided with a downwardly concave guide groove at one end close to the upper die, and the upper die is provided with a downwardly protruding guide rod, which is inserted into the guide groove and moves so that the upper die moves toward the lower die along the guide groove.

3. The silicone gasket injection molding mold according to claim 2, characterized in that: An end of the upper mold close to the lower mold is affixed with an anti-skid layer, and the anti-skid layer is synchronously attached to the lower mold along with the upper mold to prevent the upper mold and the lower mold from moving after being attached.

4. The silicone gasket injection molding mold according to claim 1, characterized in that: The upper mold is provided with an upper mold forming plate mounting groove which is recessed for mounting the upper mold forming plate. The upper mold forming plate is detachable after being mounted in the upper mold forming plate mounting groove and is aligned with the upper mold horizontal plane. The lower mold is provided with a lower mold forming plate mounting groove for mounting the lower mold forming plate. The lower mold forming plate mounting groove is connected to the heat dissipation space. The lower mold forming plate is detachable after being mounted in the lower mold forming plate mounting groove and is aligned with the horizontal plane of the lower mold.

5. The silicone gasket injection molding mold according to claim 1, characterized in that: The air nozzle is installed at the bottom of the heat dissipation space, and a joint connected to the air nozzle is provided on the side of the lower mold.

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