In-mold sprue cutting mechanism of side face glue feeding injection mold

Abstract

The utility model provides an in-mold sprue cutting mechanism of a side face glue feeding injection mold, which comprises a glue feeding channel arranged on one side of a forming cavity and a cutter capable of blocking the glue feeding channel and the forming cavity. The communication between the forming cavity and the glue inlet channel is blocked before the glue body is cooled, so that the separation of the product from the pouring gate is realized; the manual work is saved, the machining efficiency is improved, the problem of sprue residues can be solved, and the product quality is guaranteed.

Description

Technical Field

[0001] The utility model relates to the field of injection molds, in particular to an in-mold cutting gate mechanism of a side-feeding injection mold. Background Art

[0002] With the increase in production costs and the upgrading of product functions, manufacturers usually need to use a large gate injection molding method to improve injection molding efficiency in order to reduce costs and meet product functional requirements. However, in the process of injection molding products, the large gate will cause the gate and the product to be connected, and it is necessary to introduce a process to separate the gate and the product. At the same time, there will also be the problem of gate residue.

[0003] At present, the process of separating the gate from the product is mostly performed manually outside the mold, which not only increases labor costs, but also reduces processing accuracy and efficiency, making it impossible to achieve fully automatic production. In addition, subsequent processing is prone to cause environmental and product pollution. Utility Model Content

[0004] In order to solve the above problems, the utility model proposes an in-mold cutting gate mechanism for a side-feeding injection mold.

[0005] The main contents of this utility model include:

[0006] A mold-in-sprue mechanism for a side-injection injection mold, the side-injection injection mold comprising a matching male mold assembly and a female mold assembly, a molding cavity enclosed by the male and female mold assemblies, and a hot runner system;

[0007] The hot runner system includes a main runner and a glue inlet channel connected to the main runner; the glue inlet channel is arranged on one side of the molding cavity and is connected to the molding cavity; the connection between the glue inlet channel and the molding cavity is called a glue inlet;

[0008] The in-mold gate cutting mechanism includes a drive assembly and a cutter; the drive assembly is fixedly arranged on the lower side of the male mold assembly, one end of the cutter is connected to the drive assembly, and the other end is arranged below the glue inlet;

[0009] In the mold closing state, the drive assembly drives the cutter to move toward the glue inlet to block the communication between the molding cavity and the glue inlet channel.

[0010] Preferably, the mother mold assembly comprises, from top to bottom, an upper fixing plate, a hot runner plate and a mother mold plate, wherein a mother mold core is provided in the mother mold plate;

[0011] The male mold assembly includes, from bottom to top, a lower fixed plate, a mold foot, and a male mold plate, wherein a male mold core is provided in the male mold plate;

[0012] The male mold core and the female mold core form the molding cavity; a cutter fixing plate is slidably arranged in the male mold plate, the cutter is fixed on the cutter fixing plate, and the cutter fixing plate is connected to the drive assembly; the cutter passes through the male mold core.

[0013] Preferably, a corresponding glue inlet groove is provided on one side of the surface of the male mold core and the female mold core facing each other, so as to form the glue inlet channel in the mold closing state.

[0014] Preferably, the driving assembly includes a driving cylinder and a connecting rod, the driving cylinder is fixedly arranged on the lower fixed plate, one end of the connecting rod is connected to the piston of the driving cylinder, and the other end is connected to the cutter fixed plate.

[0015] Preferably, the drive assembly further comprises a return spring, the upper end of the return spring being connected to the male template, and the lower end of the return spring being connected to the cutter fixing plate. When the drive cylinder drives the cutter to move upward, the return spring is compressed.

[0016] Preferably, there are at least two molding cavities, and each molding cavity is connected to a glue inlet channel; the hot runner system also includes a plurality of sub-flow channels connected to the main flow channel, and each sub-flow channel is connected to a corresponding glue inlet channel.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows: the present invention proposes an in-mold gate cutting mechanism for a side-feed injection mold, in which a drive assembly arranged below the lower mold assembly drives the cutter to move toward the glue inlet after the mold is closed, blocking the connection between the molding cavity and the glue inlet channel before the colloid cools, thereby realizing the separation of the product and the gate; it not only saves labor and improves processing efficiency, but also solves the problem of gate residue and ensures product quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A top view of the injection mold of the present invention;

[0019] Figure 2 for Figure 1 AA cross-sectional view;

[0020] Figure 3 for Figure 2 Enlarged view of point C in the middle;

[0021] Figure 4 for Figure 1 Cross-sectional view of BB;

[0022] Reference numerals:

[0023] 10-upper fixed plate; 11-hot runner plate; 110-main runner; 111-sub-runner; 112-glue inlet channel; 113-glue inlet;

[0024] 12-mother template; 13-mother mold core;

[0025] 20-lower fixed plate; 21-die foot; 22-male die plate; 23-male die core;

[0026] 30-driving cylinder; 31-connecting rod; 32-cutter fixing plate; 33-cutter; 34-return spring; DETAILED DESCRIPTION

[0027] The technical solution protected by the present utility model is described in detail below with reference to the accompanying drawings.

[0028] This utility model proposes a mold-in-mold gate mechanism for side-injection injection molds. Figure 1 and Figure 2 The side-feed injection mold includes a matching male mold component and a female mold component, wherein the female mold component includes an upper fixed plate 10, a hot runner plate 11 and a female mold plate 12 from top to bottom, and a female mold core 13 is arranged in the female mold plate 12; and the male mold component includes a lower fixed plate 20, a mold foot 21, and a male mold plate 22 from bottom to top, and a male mold core 23 is arranged in the male mold plate 22; wherein the surfaces facing the male mold core 23 and the female mold core 13 are provided with a molding structure, and when the mold is closed, the male mold core 23 and the female mold core 13 form a molding cavity.

[0029] In the present invention, in order to be suitable for large-gate glue injection, a side glue injection method is adopted. By opening a corresponding glue feeding groove on one side of the male mold core 23 and the female mold core 13, when the mold is closed, the male mold core 23 and the female mold core 13 not only form a molding cavity, but also form a glue feeding channel 112 connected to the molding cavity; and the glue feeding channel 112 is connected to the main channel 110 provided in the hot runner plate 11, and the liquid injection colloid flows into the molding cavity through the main channel 110 and the glue feeding channel 112 to form the product. In this embodiment, one injection mold includes two molding cavities. Figure 2 In the figure, the two molding cavities are respectively located on the left and right sides of the injection mold, and are respectively connected to a glue feed channel 112, and the glue feed channels 112 are respectively opened on the outside of the molding cavity, such as the glue feed channel connected to the molding cavity on the right is located on its right side; each of the glue feed channels 112 is connected to the main channel 110 through the corresponding sub-channel 111, and the glue feed channel 112, sub-channel 111 and main channel 110 together constitute the hot runner system of the injection mold.

[0030] When the glue injection is completed, there will inevitably be a gate remaining in the glue feed channel 112. In order to separate the gate and the product in the mold, a corresponding gate cutting mechanism is set below the connection between the gate and the product; specifically, the gate cutting mechanism includes a drive component and a cutter 33; the drive component can drive the cutter 33 to move. For better description, the connection with the product corresponds to the connection between the glue feed channel 112 and the molding cavity, and this connection is called a glue feed; the utility model arranges the gate cutting mechanism below the glue feed, and before the injection molding is completed, the cutter will not affect the connection between the glue feed channel and the molding cavity. After the injection molding is completed, under the drive of the control signal, the drive component drives the cutter 33 to move toward the glue feed, so that it cuts off the connection between the gate and the product, that is, blocks the connection between the glue feed channel and the molding cavity.

[0031] Furthermore, the driving assembly includes a driving cylinder 30 and a connecting rod 31 connected to the driving cylinder piston, and the cutter 33 is connected to the connecting rod 31 through a cutter fixing plate 32. In this embodiment, Figure 2 and Figure 4 As shown, the driving cylinder 30 is fixedly arranged on the lower fixed plate, and a certain clearance space is opened on the male template 22, so that the cutter fixing plate 32 can slide up and down in the male template 22. Furthermore, a groove can be opened under the male template, and a return spring 34 is arranged in the groove, so that the upper end of the return spring 34 is connected to the male template 22 and the lower end is connected to the cutter fixing plate 32. Please combine Figure 3 and Figure 4 The cutter 33 is fixedly connected to the cutter fixing plate 32. When the injection molding is completed, the driving cylinder 30 extends, so that the cutter 33 moves to the glue inlet, thereby cutting off the gate and the product. In one embodiment, the driving cylinder 30 is a one-way cylinder or an ultra-high pressure cylinder; and when the product is cooled, the one-way cylinder and the ultra-high pressure cylinder release pressure under the control of the control signal, so that the cutter returns to the initial position under the action of the return spring 34 without affecting the subsequent mold opening and product ejection.

[0032] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the description and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. An in-mold gate mechanism for a side-injection injection mold, the side-injection injection mold comprising a mating male and female mold assemblies, a molding cavity formed by the male and female mold assemblies, and a hot runner system; It is characterized by: The hot runner system includes a main runner and a glue inlet channel connected to the main runner; the glue inlet channel is arranged on one side of the molding cavity and is connected to the molding cavity; the connection between the glue inlet channel and the molding cavity is called a glue inlet; The in-mold gate cutting mechanism includes a drive assembly and a cutter; the drive assembly is fixedly arranged on the lower side of the male mold assembly, one end of the cutter is connected to the drive assembly, and the other end is arranged below the glue inlet; In the mold closing state, the drive assembly drives the cutter to move toward the glue inlet to block the communication between the molding cavity and the glue inlet channel.

2. The in-mold gate mechanism of a side-feed injection mold according to claim 1, characterized in that: The mother mold assembly comprises, from top to bottom, an upper fixed plate, a hot runner plate, and a mother mold plate, wherein a mother mold core is provided in the mother mold plate; The male mold assembly includes, from bottom to top, a lower fixed plate, a mold foot, and a male mold plate, wherein a male mold core is provided in the male mold plate; The male mold core and the female mold core form the molding cavity; a cutter fixing plate is slidably arranged in the male mold plate, the cutter is fixed on the cutter fixing plate, and the cutter fixing plate is connected to the drive assembly; the cutter passes through the male mold core.

3. The in-mold gate mechanism of a side-feed injection mold according to claim 2, characterized in that: One side of the surface where the male mold core and the female mold core face each other is provided with a corresponding glue inlet groove to form the glue inlet channel in the mold closing state.

4. The in-mold gate mechanism of a side-feed injection mold according to claim 2, characterized in that: The driving assembly includes a driving cylinder and a connecting rod. The driving cylinder is fixedly arranged on the lower fixed plate. One end of the connecting rod is connected to the piston of the driving cylinder, and the other end is connected to the cutter fixed plate.

5. The in-mold gate mechanism of a side-feed injection mold according to claim 4, characterized in that: The driving assembly also includes a return spring, the upper end of which is connected to the male template, and the lower end of which is connected to the cutter fixing plate. When the driving cylinder drives the cutter to move upward, the return spring is compressed; the driving cylinder is a one-way cylinder or an ultra-high pressure cylinder.

6. The in-mold gate mechanism of a side-feed injection mold according to any one of claims 1 to 5, characterized in that: There are at least two molding cavities, and each molding cavity is connected to a glue inlet channel; the hot runner system also includes a plurality of sub-runners connected to the main runner, and each sub-runner is connected to a corresponding glue inlet channel.

Images