Gate-in-mold separation structure

Abstract

This utility model relates to a gate mold separation structure, including a male mold core, a male mold core plate, an upper ejector plate, a lower ejector plate, and a lower fixed plate. The male mold core is disposed on the male mold core plate and has a gate runner. The upper ejector plate has ejector pins that pass through the male mold core plate and the male mold core and are positioned at the lower end of the product. The upper ejector plate also has a sleeve that passes through the male mold core plate and the male mold core and is positioned at the lower end of the gate runner. The lower fixed plate has an inner ejector pin that passes into the sleeve. The lower ejector plate has a delay pin between the sleeve and the lower fixed plate. By ejecting the material below the overflow well with the sleeve pin and performing delayed ejection on the sleeve pin on the ejector plate, after the mold opens, the product is ejected first and then ejected from the runner, so that the product and the runner are automatically separated. The product and the runner can be automatically separated without the need for manual breaking of the runner, realizing automation and effectively improving production efficiency. No post-molding processing steps are required, and the product can be directly installed on the machine after molding, reducing the breaking of residual material.

Description

Technical Field

[0001] This utility model relates to the field of injection mold technology, and in particular to a gate separation structure inside the mold. Background Technology

[0002] Injection molds are an indispensable tool in injection molding. To obtain plastic products, the product needs to be separated from the gate. Existing gate separation methods typically include manual operation, robotic arms, point gates, and hot runners. However, for some hollow plastic products (such as handle tail caps), the mold design for handle tail caps requires the addition of an overflow well for ejector pins to assist in ejection. This results in the product and runner being connected during mold demolding, requiring manual breaking of the overflow well to separate it from the product. After injection molding, before installation on the machine, the overflow well used for auxiliary ejection must be manually broken off, which not only increases time costs but also reduces efficiency. Utility Model Content

[0003] The purpose of this utility model is to provide an in-mold separation structure for the gating system. By using ejector pins below the overflow well and delaying ejection on the ejector pins on the ejector plate, the product is ejected first and then ejected from the runner, so that the product and the runner are automatically separated. This eliminates the need for manual breaking of the runner, achieving automatic separation of the product and the runner, realizing automation, effectively improving production efficiency, and making it safer and more reliable. It also eliminates the need for post-molding processing steps, allowing direct loading of the product after molding and reducing the need to break off residual material.

[0004] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a gate mold separation structure, comprising a male mold core, a male mold core plate, an upper ejector plate, a lower ejector plate, and a lower fixing plate. The male mold core is disposed on the male mold core plate, and a gate runner is formed on the male mold core. The upper ejector plate contains ejector pins that pass through the male mold core plate and the male mold core and are positioned corresponding to the lower end of the product. The upper ejector plate also contains a sleeve that passes through the male mold core plate and the male mold core and is positioned corresponding to the lower end of the gate runner. The lower fixing plate contains an inner ejector pin that penetrates into the sleeve. A delay pin is provided in the lower ejector plate between the sleeve and the lower fixing plate.

[0005] Preferably, the lower end of the upper ejector plate is provided with an upper separation hole for the gating channel to facilitate the installation and movement of the lower part of the sleeve, and the upper part of the lower ejector plate is provided with a lower separation hole for the gating channel to facilitate the installation and movement of the delay pin. The upper separation hole and the lower separation hole are configured together to form a gating channel separation hole.

[0006] More preferably, the upper separation hole of the gating channel is provided with an upper limit groove, and the lower separation hole of the gating channel is provided with a lower limit groove.

[0007] More preferably, the lower fixing plate is provided with a pad to facilitate the placement of the lower end of the needle inside the sleeve.

[0008] The beneficial effects of this utility model are as follows: It includes a male mold core, a male mold core plate, an upper ejector plate, a lower ejector plate, and a lower fixing plate. The male mold core is disposed on the male mold core plate and has a sprue runner. The upper ejector plate has ejector pins that pass through the male mold core plate and the male mold core and are positioned corresponding to the lower end of the product. The upper ejector plate also has an ejector sleeve that passes through the male mold core plate and the male mold core and is positioned corresponding to the lower end of the sprue runner. The lower fixing plate has an ejector inner pin that passes through the ejector sleeve. The lower ejector plate is equipped with a delay pin corresponding to the ejector sleeve and the lower fixed plate. By ejecting the material below the overflow well with the ejector pin and delaying the ejection on the ejector pin on the ejector plate, the product is ejected first after the mold is opened, and then ejected from the runner, so that the product and the runner are automatically separated. The product and the runner do not need to be manually broken off, which can achieve automatic separation of the product and the runner, realize automation, effectively improve production efficiency, and make safety more reliable. No post-molding processing steps are required, and the product can be directly installed on the machine after molding, reducing the breaking of residual material. Attached Figure Description

[0009] Figure 1 This is a structural diagram of the product of this utility model in the state before it is ejected after the mold is opened.

[0010] Figure 2 This is a structural diagram of the product of this utility model in the state of separation from the gate runner.

[0011] Figure 3 This is a schematic diagram of the structure of the present invention in the state of separation between the gate runner and the inner needle of the ejector sleeve.

[0012] Figure 4 This is a structural schematic diagram of the ejected and returned state of this utility model. Detailed Implementation

[0013] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments.

[0014] like Figure 1-4As shown, a gate mold separation structure includes a male mold core 1, a male mold core plate 2, an upper ejector plate 3, a lower ejector plate 4, and a lower fixing plate 5. The male mold core 1 is disposed on the male mold core plate 2, and a gate runner 6 is formed on the male mold core 1. The upper ejector plate 3 has ejector pins 7 that pass through the male mold core plate 2 and the male mold core 1 and are positioned corresponding to the lower end of the product. The upper ejector plate 3 also has a sleeve 8 that passes through the male mold core plate 2 and the male mold core 1 and is positioned corresponding to the lower end of the gate runner 6. The lower fixing plate 5 has an inner ejector pin 9 that passes through the sleeve 8. The lower ejector plate 4 is provided with a delay pin 10 between the ejector sleeve 8 and the lower fixed plate 5. By ejecting the material below the overflow well with the ejector pin, and delaying the ejection on the ejector pin on the ejector plate 7, the product is ejected first after the mold is opened. Then, the gate runner 6 is ejected by the characteristics of the delay pin 10, so that the product and the gate runner 6 are automatically separated. The gate runner 6 can be automatically separated without the need for manual breaking. This achieves automation, effectively improves production efficiency, and is safer and more reliable. No post-molding processing steps are required, and the product can be directly installed on the machine after molding, reducing the need to break off residual material.

[0015] In this embodiment, the lower end of the upper ejector plate 3 is provided with an upper separation hole 11 for the gating channel to facilitate the installation and movement of the lower part of the ejector sleeve 8. The upper part of the lower ejector plate 4 is provided with a lower separation hole 12 for the gating channel to facilitate the installation and movement of the delay needle 10. The upper separation hole 11 and the lower separation hole of the gating channel 6 are configured to form a separation hole for the gating channel 6. The upper separation hole 11 is provided with an upper limit groove 13, and the lower separation hole of the gating channel 6 is provided with a lower limit groove 14. This facilitates the ejector sleeve 8 and the delay needle 10 to move relative to the upper limit groove 13 and the lower limit groove 14 on the upper ejector plate 3 and the lower ejector plate 4, respectively.

[0016] In this embodiment, the lower fixing plate 5 is provided with a pad 15 to facilitate the placement of the lower end of the inner needle 9 of the ejector sleeve, and the pad 15 supports the inner needle 9 of the ejector sleeve.

[0017] Refer to the diagram for specific instructions, such as... Figure 1 As shown, this is the state where the product has not been ejected after the mold is opened.

[0018] like Figure 2 As shown, at this time, the inner needle 9 of the ejector sleeve and the gate runner 6 (inverted) are stationary, the ejector sleeve 8 and the delay needle 10 are stationary, and the ejector pin 7 pushes the product out by 5mm, so that the product is separated from the gate runner 6.

[0019] like Figure 3 As shown, at this time, the inner needle 9 of the ejector sleeve remains stationary, the ejector sleeve 8 and the delay needle 10 push the gate runner 6 (reverse buckle force release) out 30mm, and the ejector pin 7 pushes the product out 30mm simultaneously, so that the gate runner 6 is separated from the inner needle 9 of the ejector sleeve.

[0020] like Figure 4 As shown, at this time, the inner needle 9 of the ejector sleeve remains stationary, while the ejector sleeve 8, the delay needle 10, and the ejector pin 7 are all in the return position, realizing fully automatic production of the product and the gate flow channel 6.

[0021] By following the above steps, the product can be automatically separated from the gate channel 6 without manual processing.

[0022] Based on the concept of this utility model, there may be changes in the specific implementation methods and application scope. The content of this specification should not be construed as a limitation of this utility model.

Claims

1. A gate-in- mold separation structure characterized by: The device includes a male mold core, a male mold core plate, an upper ejector plate, a lower ejector plate, and a lower fixing plate. The male mold core is disposed on the male mold core plate and has a sprue runner. The upper ejector plate has ejector pins that pass through the male mold core plate and the male mold core and are positioned at the lower end of the product. The upper ejector plate also has an ejector sleeve that passes through the male mold core plate and the male mold core and is positioned at the lower end of the sprue runner. The lower fixing plate has an ejector inner pin that passes through the ejector sleeve. The lower ejector plate has a delay pin positioned between the ejector sleeve and the lower fixing plate.

2. The in-mold parting structure of claim 1, wherein: The upper ejector plate has an upper separation hole for the gating channel at its lower end, which facilitates the installation and movement of the lower part of the sleeve. The lower ejector plate has a lower separation hole for the gating channel at its upper inner part, which facilitates the installation and movement of the delay needle. The upper separation hole and the lower separation hole are configured together to form a gating channel separation hole.

3. A parting in-gate structure according to claim 2, wherein: The upper separation hole of the gating channel is provided with an upper limit groove, and the lower separation hole of the gating channel is provided with a lower limit groove.

4. The in-mold parting structure of claim 1, wherein: The lower fixing plate is provided with a pad to facilitate the placement of the lower end of the needle inside the sleeve.

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