A mold structure with a slide block that automatically breaks the gate

Abstract

The present invention proposes a mold structure for automatically breaking the gate by pulling a slider, comprising a front mold, a rear mold, a slider broach assembly and a material bag that cooperate with each other; a flow channel is formed between the front mold and the rear mold, and each gate end of the flow channel is connected to an action pipe; the action pipe extends into an injection cavity; the material bag fixes the outer surface of the action pipe and is clamped on the front surface of the slider broach assembly; the slider broach assembly is arranged between the front mold and the rear mold; the slider broach assembly and the injection cavity are respectively located on both sides of the flow channel; during injection molding, the plastic passes through the flow channel and enters the material bag and the injection cavity in sequence from the gate. The present invention utilizes a slider insert installed on a slider seat to disconnect the flow channel from the product by using the material bag and the action pipe when the injection molding machine completes the injection and opens the mold. The present invention separates the product from the flow channel in advance before the product is ejected from the cavity, eliminates subsequent processes, and is conducive to production automation.

Description

Technical Field

[0001] The invention relates to a mould, in particular to a mould structure with a sliding block pulling off and automatically breaking a pouring gate. Background Art

[0002] In the modern injection molding process, the requirements for production efficiency and product appearance are getting higher and higher. While improving production efficiency, the product appearance quality requirements must be guaranteed. Therefore, the automated production of molds has emerged, that is, the product and the runner are automatically separated when the mold is opened and ejected. At present, there are three ways of automated mold production: latent gate, point gate and hot runner directly on the product. However, many products cannot use the above three gate methods due to structural and appearance requirements, and can only use the side gate method.

[0003] However, in the prior art, the product and the runner cannot be separated when the side gate is used for injection molding and mold opening and ejection, that is, the runner and the product are connected through the gate, so secondary processing is required to separate the product from the runner. The secondary processing has the following defects: workers need to trim the gate, which is labor-intensive and greatly reduces efficiency; there will be residue or lack of glue at the separation of the product and the runner during the secondary processing, and the appearance quality of the product will be affected if the gate is trimmed unsightly, and the product scrap rate will also increase. Summary of the invention

[0004] The purpose of the present invention is to provide a mold structure with a slider that automatically breaks the gate, so as to achieve automatic separation of the product and the runner without manual operation, thereby improving production efficiency and reducing the scrap rate. To achieve the above purpose, the technical solution adopted by the present invention is:

[0005] A mold structure for automatically breaking a gate by pulling a slider, comprising a front mold, a rear mold, a slider puller assembly and a material bag that cooperate with each other;

[0006] A flow channel for injection molding products is formed between the front mold and the rear mold, and each gate end of the flow channel is connected to an action pipe; the action pipe extends into an injection cavity; the material bag fixes the outer surface of the action pipe and is clamped on the front surface of the slider broach assembly;

[0007] The slider broach assembly is arranged between the front mold and the rear mold; the slider broach assembly and the injection cavity are respectively located on both sides of the flow channel;

[0008] During injection molding, the plastic passes through the runner and enters the material bag and the injection molding cavity in sequence from the gate;

[0009] After the mold is opened, the slider broach assembly drives the material bag to move, and the material bag cuts off the action pipeline and the product injection cavity.

[0010] Preferably, the slider broach assembly comprises a slider insert, a slider seat and a scraper;

[0011] The slider insert is installed on the slider seat; a groove for placing the material bag is provided on the front surface of the slider insert;

[0012] The shovel machine is clamped on the outer side of the slider seat; the shovel machine is fixed on the front mold.

[0013] Preferably, the material bag is a protrusion.

[0014] Preferably, the contact surface between the action pipe and the material bag is a plane.

[0015] Preferably, the action conduit comprises an injection nozzle; the injection nozzle is connected to the injection cavity.

[0016] Preferably, the size of the material bag is 4.5mm*3mm*2mm.

[0017] Preferably, the flow channel and the action pipeline are integrally formed.

[0018] Preferably, the front mold includes a panel, a front mold frame, a front mold core, a positioning ring and a pouring cup;

[0019] The panel is located on the front side of the front mold frame; a hole penetrating the panel is provided in the center of the panel; the upper edge of the hole is fixed with a positioning ring by bolts;

[0020] The front mold frame is fixed to the rear side of the panel by bolts;

[0021] The front mold core is embedded in the center of the front mold frame; a pouring channel connected to the flow channel is provided through the front mold core; the pouring channel is provided with the pouring cup at the front of the positioning ring.

[0022] Preferably, the rear mold includes a rear mold frame, a rear mold core, a mold foot, and a bottom plate; the rear mold core is fixed at the center of the rear mold frame, and the rear mold core is opposite to the bottom of the front mold core; the flow channel is formed between the front mold core and the rear mold core; and the mold foot is fixed on the bottom plate.

[0023] Compared with the prior art, the advantages of the present invention are as follows: the present invention utilizes the slider insert installed on the slider seat to disconnect the runner from the product by using the material bag when the injection molding machine has just completed the injection and opened the mold. The present invention separates the product from the runner in advance before the product is ejected from the cavity, eliminating subsequent processes, which is conducive to production automation and reduces dependence on people; it avoids useless human actions in the production process, and has incomparable advantages over traditional molds in the large-scale production of products. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1It is a longitudinal sectional view of the side of the mold structure of the automatic gate breaking by pulling off the slider according to one embodiment of the present invention when the mold is closed for injection;

[0025] Figure 2 A longitudinal section of a slider-broken mold structure for automatically breaking a gate according to an embodiment of the invention, in which a slider is broken off a product and a runner after the mold is opened after the mold is closed and the injection is completed;

[0026] Figure 3 for Figure 1 Front view of the slider insert, runner, injection molded product and material package.

[0027] Figure 4 for Figure 3 A magnified image of the medium material bag;

[0028] Figure 5 This is a top view of a mold structure of a slider breaking and automatically breaking a gate in a mold closing state according to an embodiment of the present invention.

[0029] Among them, 1-product, 2-runner, 3-material bag, 4-slider insert, 5-panel, 6-front mold frame, 7-rear mold frame, 8-mold foot, 9-ejector panel, 10-ejector base plate, 11-base plate, 12-locating ring, 13-pouring cup, 14-front mold core, 15-rear mold core, 16-slider seat, 17-shovel machine, 18-spring, 19-ejector rod, 20 return needle, 21-action pipe, 22-gate. DETAILED DESCRIPTION

[0030] The following will be described in more detail with reference to the schematic diagram of the present invention, wherein the preferred embodiment of the present invention is shown, and it should be understood that the present invention described herein can be modified by a person skilled in the art, while still achieving the advantageous effects of the present invention. Therefore, the following description should be understood as being widely known to a person skilled in the art, and not as a limitation of the present invention.

[0031] like Figures 1 to 5 As shown, a mold structure for automatically breaking a gate 22 by pulling a slider, comprising a front mold, a rear mold, a slider broach assembly and a material bag 3 that cooperate with each other; a flow channel 2 for injection molding a product 1 is formed between the front mold and the rear mold, and each end of a gate 22 of the flow channel 2 is connected to an action pipe 21; the action pipe 21 extends into an injection cavity; the material bag 3 is fixed to the outer surface of the action pipe 21 and clamped on the front surface of the slider broach assembly; the material bag 3 can move toward the outside of the mold with the slider broach assembly; the slider broach assembly is arranged between the front mold and the rear mold, and when an external force is applied, the slideway assembly can move along the front surface of the rear mold;

[0032] The slider broach assembly and the injection cavity are located on both sides of the flow channel 2; when the slider broach assembly moves, it faces away from the injection cavity and away from the flow channel 2; Figure 1During injection molding, the plastic passes through the runner 2 and the gate 22 and enters the action pipe 21 and the injection cavity in sequence; Figures 2-3 In the process, the injection molding is completed and the mold is opened. At this time, the product 1 is fixed on the rear mold, and the material bag 3 is clamped on the slider broach assembly. When an external force is applied, the slider broach assembly drives the material bag 3 to move, the action pipeline 21 moves, and the product 1 is stationary. The two generate a pulling force, and the product 1 and the action pipeline 21 in the injection molding cavity are disconnected at the weak point where the action pipeline 21 and the product 1 are connected, realizing the automatic glue breaking process of the product 1, that is, the material bag 3 cuts off the gate 22 and the product 1. In this embodiment, the runner 2 and the action pipeline 21 are integrally formed.

[0033] In this embodiment, the slider broach assembly includes a slider insert 4, a slider seat 16 and a scraper 17; the slider insert 4 is installed on the slider seat 16; a groove for installing the material bag 3 is provided on the front surface of the slider insert 4; the slider insert 4 extends into the injection cavity of the product 1 and is below the runner 2; the scraper 17 is provided on the outer side of the slider seat 16, and the scraper 17 is used to fix the slider seat 16 after the mold is closed; the scraper 17 is fixed on the front mold.

[0034] like Figure 4 As shown, the material bag is a protrusion.

[0035] In this embodiment, the contact surface between the action pipe and the material bag is a plane.

[0036] In this embodiment, the action pipeline includes an injection nozzle; the injection nozzle is connected to the injection cavity.

[0037] In this embodiment, the size of the material package is 4.5mm*3mm*2mm.

[0038] In this embodiment, the front mold includes a panel 5, a front mold frame 6, a front mold core 14, a positioning ring 12 and a pouring cup 13; the panel 5 is located on the front side of the front mold frame 6; a hole penetrating the panel 5 is provided in the center of the panel 5; the upper edge of the hole is fixed to the positioning ring 12 by bolts; the front mold frame 6 is fixed to the rear side of the panel 5 by bolts; the front mold core 14 is embedded in the center of the front mold frame 6; a casting channel connected to the runner 2 is provided through the front mold core 14; a pouring cup 22 is provided in the casting channel opposite to the front of the positioning ring 12.

[0039] In this embodiment, the rear mold includes a rear mold frame 7, a rear mold core 15, a mold foot 8, and a bottom plate 11; the rear mold core 15 is fixed in the center of the rear mold frame 7, and the rear mold core 15 is directly opposite to the bottom of the front mold core 14; a flow channel 2 is formed between the front mold core 14 and the rear mold core 15; the mold foot 8 is fixed on the bottom plate 11. Among them, the ejector panel 9 and the ejector bottom plate 10 are fixed with screws, and an ejector rod 19 and a return pin 20 are installed between the ejector panel 9 and the ejector bottom plate 10; a spring 18 is provided between the ejector panel 9 and the rear mold frame 7, and the spring 18 is installed on the return pin 20.

[0040] The working principle of the present invention is as follows: after the front mold and the rear mold are closed, plastic is injected through the pouring cup 13, and the plastic passes through the runner 2, the gate 22, the action pipe 21 in turn, and enters the injection cavity from the injection nozzle to perform the injection molding process; after the injection molding is completed, the mold is opened, and when the mold is opened, the material bag 3 is clamped on the rear slider broach assembly; the front mold is removed, and the slider insert 4 is pulled to the outside of the mold structure through the front mold inclined guide column, and the slider insert 4 uses the material bag 3 to drive the action pipe 21 to cut off the product 1 and the action pipe 21; then the ejector rod 19 ejects the product 1, and the ejector rod 19 retreats and the mold is closed.

[0041] In summary, in the mold structure of the slider pulling off the automatic gate breaking 22 provided in the embodiment of the present invention, after the traditional plastic mold is opened, the product 1 is connected to the runner 2, and two processes are required for manual shearing and separation. The present invention separates the product 1 from the runner 2 in advance before the product 1 is ejected from the cavity, eliminating subsequent processes, which is conducive to production automation and reduces dependence on people; it avoids useless human actions in the production process, and has incomparable advantages over traditional molds in the large-scale production process of product 1.

[0042] The above is only a preferred embodiment of the present invention and does not limit the present invention in any way. Any technician in the relevant technical field, without departing from the scope of the technical solution of the present invention, makes any form of equivalent replacement or modification to the technical solution and technical content disclosed in the present invention, which does not depart from the content of the technical solution of the present invention and still falls within the protection scope of the present invention.

Claims

1. A mold structure for automatically breaking the gate by pulling off the slider, characterized in that: It includes a front mold, a rear mold, a slider broach assembly and a material bag that cooperate with each other; A flow channel for injection molding products is formed between the front mold and the rear mold, and each gate end of the flow channel is connected to an action pipe; the action pipe extends into an injection cavity; the material bag fixes the outer surface of the action pipe and is clamped on the front surface of the slider broach assembly; The slider broach assembly is arranged between the front mold and the rear mold; the slider broach assembly and the injection cavity are respectively located on both sides of the flow channel; During injection molding, the plastic passes through the runner and enters the material bag and the injection molding cavity in sequence from the gate; After the mold is opened, the slider broach assembly drives the material bag to move, and the material bag cuts off the action pipeline and the product injection cavity; The slider broach assembly includes a slider insert, a slider seat and a scraper; The slider insert is installed on the slider seat; a groove for placing the material bag is provided on the front surface of the slider insert; The shovel is clamped on the outer side of the slider seat; the shovel is fixed on the front mold; The action pipeline includes an injection nozzle; the injection nozzle is connected to the injection cavity; When external force is applied, the slider and broaching tool assembly drives the material package to move, the action pipe moves, and the product is stationary. The two generate pulling force, and the product in the injection molding cavity and the action pipe are disconnected at the weak point where the action pipe and the product are connected, realizing the automatic glue breaking process of the product.

2. The mold structure for automatically breaking the gate by pulling the slider apart according to claim 1 is characterized in that: The material bag is a protrusion.

3. The mold structure for automatically breaking the gate by pulling the slider apart according to claim 1 is characterized in that: The contact surface between the action pipe and the material bag is a plane.

4. The mold structure for automatically breaking the gate by pulling the slider apart according to claim 1 is characterized in that: The size of the material bag is 4.5mm*3mm*2mm.

5. The mold structure for automatically breaking the gate by pulling the slider apart according to claim 1 is characterized in that: The front mold comprises a panel, a front mold frame, a front mold core, a positioning ring and a pouring cup; The panel is located on the front side of the front mold frame; a hole penetrating the panel is provided in the center of the panel; the upper edge of the hole is fixed with a positioning ring by bolts; The front mold frame is fixed to the rear side of the panel by bolts; The front mold core is embedded in the center of the front mold frame; a pouring channel connected to the flow channel is provided through the front mold core; the pouring channel is provided with the pouring cup at the front of the positioning ring.

6. The mold structure for automatically breaking the gate by pulling the slider apart according to claim 5 is characterized in that: The rear mold includes a rear mold frame, a rear mold core, a mold foot, and a bottom plate; the rear mold core is fixed at the center of the rear mold frame, and the rear mold core is directly opposite to the bottom of the front mold core; the flow channel is formed between the front mold core and the rear mold core; and the mold foot is fixed on the bottom plate.

7. The mold structure for automatically breaking the gate by pulling the slider apart according to claim 1 is characterized in that: The flow channel and the action pipeline are integrally formed.

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