Mold for coating silica gel

Abstract

The utility model discloses a mold for coating silica gel. The mold comprises a rear mold core, a middle plate, a front mold core and a sliding block, the rear mold core is provided with a containing cavity, the middle plate is installed on the rear mold core in a pick-and-place mode, a through groove is formed in the front end face of the middle plate and communicated with the containing cavity, and a tunnel is formed in the circumferential side face of the middle plate; the front mold core is mounted on the middle plate in a pick-and-place manner, and is provided with an injection molding opening which is communicated with the through groove; the sliding block is inserted into the tunnel and extends into the containing cavity. The tunnel is formed in the peripheral side face of the middle plate, the sliding block is inserted into the tunnel and extends into the containing cavity, and when silica gel is coated in an injection molding mode, the sliding block tightly abuts against the plastic shell and covers the through hole in the plastic shell or extends into the groove in the plastic shell, so that the silica gel cannot flow through the through hole when flowing, and the silica gel cannot flow out of the containing cavity. Or the silica gel only flows through the inner surface of the groove and cannot be accumulated in the groove, so that the plastic shell cannot be scrapped while the plastic shell is coated with a layer of silica gel.

Description

Technical Field

[0001] The utility model relates to the technology of mold field, in particular to a mold used for coating silica gel. Background Art

[0002] Injection molding, also known as injection molding, is a molding method that combines injection and molding. The advantages of injection molding are fast production speed, high efficiency, automated operation, a wide variety of colors, shapes from simple to complex, sizes from large to small, and precise product size. The product is easy to update and can be made into complex-shaped parts. Injection molding is suitable for mass production and complex-shaped products and other molding and processing fields.

[0003] Most existing products have a plastic shell to protect the internal structure of the product. However, the plastic shell is often in contact with external objects, which makes the surface of the plastic shell easily scratched and leaves scratches, resulting in an unsightly appearance. Therefore, manufacturers will coat the plastic shell with a layer of silicone by injection molding. Some plastic shells will have through holes or grooves on the surface according to product requirements. Silicone coating by injection molding can easily cause silicone to block the through holes or accumulate in the grooves, making the plastic shell scrapped. Therefore, it is necessary to improve the above problems. Utility Model Content

[0004] In view of this, the present invention aims to solve the deficiencies in the prior art, and its main purpose is to provide a mold for coating silicone, which can effectively prevent the silicone from blocking the through holes or accumulating in the grooves when the plastic shell is coated with silicone, thereby causing the plastic shell to be scrapped.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A mold for coating silicone comprises a rear mold core, a middle plate, a front mold core and a slider; the rear mold core has a receiving cavity, the middle plate can be installed on the rear mold core in a removable manner, a through groove is provided on the front end surface of the middle plate, the through groove is connected to the receiving cavity, and a tunnel is provided on the peripheral side surface of the middle plate; the front mold core can be installed on the middle plate in a removable manner, the front mold core has an injection port, and the injection port is connected to the through groove; the slider is inserted into the tunnel and extends into the receiving cavity.

[0007] As a preferred solution, there are four tunnels, two of which are opened on the front side of the middle plate, and the other two tunnels are opened on the two side surfaces of the middle plate respectively. Correspondingly, there are also four sliders, which are respectively inserted into the corresponding tunnels.

[0008] As a preferred solution, a positioning portion extends forward from the bottom end surface of the accommodating cavity.

[0009] As a preferred solution, a positioning groove for positioning with an external mechanism is provided on the peripheral side surface of the rear mold core.

[0010] As a preferred solution, a positioning cavity is provided on the front end surface of the front mold core, and the injection port is provided on the bottom end surface of the positioning cavity, so as to facilitate the cooperation between the front mold core and the external injection molding structure.

[0011] As a preferred solution, the rear mold core is convexly provided with a plurality of limiting columns, and the peripheral side of the middle plate is provided with a plurality of limiting grooves, and each limiting column is inserted into a corresponding limiting groove for limiting position, so as to prevent position deviation when the middle plate is installed.

[0012] Compared with the prior art, the utility model has obvious advantages and beneficial effects. Specifically, it can be seen from the above technical solution that:

[0013] A tunnel is opened on the peripheral side of the middle plate, and the slider is inserted into the tunnel and extends into the accommodating cavity. When the silicone is injection-molded, the slider is tightly pressed against the plastic shell and covers the through hole on the plastic shell or extends into the groove of the plastic shell, so that the silicone will not flow through the through hole when flowing, or only flow through the inner surface of the groove without accumulating in the groove, so that the plastic shell will not be scrapped while being coated with a layer of silicone.

[0014] In order to more clearly illustrate the structural features and functions of the present invention, the present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments: BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of an assembly perspective view of a preferred embodiment of the utility model;

[0016] Figure 2 It is an exploded view of a preferred embodiment of the utility model;

[0017] Figure 3 It is an exploded view from another angle of the preferred embodiment of the utility model;

[0018] Figure 4 It is a cross-sectional view of a preferred embodiment of the utility model;

[0019] Figure 5 It is another cross-sectional view of a preferred embodiment of the utility model.

[0020] Description of the accompanying drawings:

[0021] 10. Rear mold core 101. Accommodating cavity

[0022] 102, positioning groove 11, positioning portion

[0023] 12. Limiting column 20. Middle plate

[0024] 201, slot 202, tunnel

[0025] 203, limit slot 30, front mold core

[0026] 301, injection port 302, positioning cavity

[0027] 40. Slider. DETAILED DESCRIPTION

[0028] Please refer to Figures 1 to 5 As shown, it shows the specific structure of a preferred embodiment of the utility model, including a rear mold core 10, a middle plate 20, a front mold core 30 and a slider 40.

[0029] The rear mold core 10 has a receiving cavity 101 . In the present embodiment, a positioning portion 11 extends forward from the bottom end surface of the receiving cavity 101 . A positioning groove 102 for positioning with an external mechanism is formed on the peripheral side surface of the rear mold core 10 . Also, a plurality of limiting columns 12 are convexly formed on the rear mold core.

[0030] The middle plate 20 is installed on the rear mold core 10 in a removable manner. A through groove 201 is provided on the front end surface of the middle plate 20, and the through groove 201 is connected to the accommodating cavity 101. Tunnels 202 are provided on the peripheral side of the middle plate 20. In the present embodiment, there are four tunnels 202, two tunnels 202 are provided on the front side of the middle plate 20, and the remaining two tunnels 202 are respectively provided on the two side surfaces of the middle plate 20. In addition, a plurality of limiting grooves 203 are provided on the peripheral side of the middle plate 20, and each limiting column 12 is inserted into the corresponding limiting groove 203 for limiting, so as to prevent the position deviation of the middle plate 20 during installation.

[0031] The front mold core 30 is installed on the middle plate 20 in a removable manner, and the front mold core 30 has an injection port 301, which is connected to the through groove 201; in this embodiment, a positioning cavity 302 is provided on the front end face of the front mold core 30, and the injection port 301 is opened on the bottom end face of the positioning cavity 302, so as to facilitate the cooperation between the front mold core 30 and the external injection molding structure.

[0032] The slider 40 is inserted into the tunnel 202 and extends into the accommodating cavity 101 . In this embodiment, there are four sliders 40 , which are respectively inserted into corresponding tunnels 202 .

[0033] The working process of this embodiment is described in detail as follows:

[0034] First, place the plastic shell 50 into the accommodating cavity 101, and then install the middle plate 20, and insert each limiting column 12 into the corresponding limiting groove 203 for limiting. Then, insert the slider 40 into the tunnel 202 and extend into the accommodating cavity 101. The corresponding slider 40 is tightly in contact with the plastic shell 50 and covers the through hole of the plastic shell 50. The remaining sliders 40 extend into the groove of the plastic shell 50. The remaining sliders 40 do not contact the inner wall surface of the groove of the plastic shell 50, and there is a gap between the two for the silicone liquid to flow, so as to prevent the silicone liquid from accumulating in the groove of the plastic shell 50 and make the silicone liquid effectively cover the inner wall surface of the groove of the plastic shell 50. Then, install the front mold core 30 and start injecting silicone.

[0035] The design focus of the utility model is that a tunnel is opened on the peripheral side surface of the middle plate, the slider is inserted into the tunnel and extends into the accommodating cavity, and when the silicone is injection-molded, the slider is tightly pressed against the plastic shell and covers the through hole on the plastic shell or extends into the groove of the plastic shell, so that the silicone will not flow through the through hole when flowing, or only flow through the inner surface of the groove without accumulating in the groove, so that the plastic shell will not be scrapped when a layer of silicone is coated on the plastic shell.

[0036] The above description is only a preferred embodiment of the present invention and does not limit the technical scope of the present invention. Therefore, any slight modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A mold for coating silicone, comprising a rear mold core, a middle plate and a front mold core; the rear mold core has a receiving cavity, the middle plate can be installed on the rear mold core in a removable manner, a through groove is provided on the front end surface of the middle plate, and the through groove is connected to the receiving cavity; the front mold core can be installed on the middle plate in a removable manner, and the front mold core has an injection port, and the injection port is connected to the through groove; characterized in that: The middle plate also includes a sliding block. A tunnel is opened on the peripheral side surface of the middle plate. The sliding block is inserted into the tunnel and extends into the accommodating cavity.

2. The mold for coating silica gel according to claim 1, characterized in that: There are four tunnels, two of which are opened on the front side of the middle plate, and the other two tunnels are opened on the two side surfaces of the middle plate respectively. Correspondingly, there are also four sliders, which are respectively inserted into the corresponding tunnels.

3. The mold for coating silica gel according to claim 1, characterized in that: A positioning portion is extended forward from the bottom end surface of the accommodating cavity.

4. The mold for coating silica gel according to claim 1, characterized in that: The peripheral side surface of the rear mold core is provided with a positioning groove for positioning with an external mechanism.

5. The mold for coating silica gel according to claim 1, characterized in that: The front end surface of the front mold core is provided with a positioning cavity, and the injection port is provided at the bottom end surface of the positioning cavity.

6. The mold for coating silica gel according to claim 1, characterized in that: The rear mold core is convexly provided with a plurality of limiting columns, and the peripheral side surface of the middle plate is provided with a plurality of limiting grooves, and each limiting column is inserted into a corresponding limiting groove for limiting position.

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