CN209409190U - Gating system of injection mold - Google Patents

Abstract

The utility model discloses a pouring system for an injection mold, including a mold body and an injection molding machine, wherein a left mold and a right mold are arranged in the mold body, a main flow channel is arranged inside the right mold, and a branch hole and a plurality of branch flows which are sealed and connected to the end of the main flow channel are arranged on one side of the left mold; a first hydraulic cylinder is fixedly installed on one side of the mold body, and the first hydraulic cylinder is connected to a first cutter by driving through a hydraulic telescopic rod, and the first cutter is located above the interface between the main flow channel and the injection molding machine; a second hydraulic cylinder is installed on one side of the end of the branch flow channel in the left mold, and a second cutter is installed on the side wall of the branch flow channel, and the second hydraulic cylinder is connected to the second cutter by driving through a hydraulic telescopic rod. The pouring system of the utility model is provided with a hydraulically driven cutter, which can first cut off the connection between the cooling material in the main flow channel and the material in the injection molding machine through the cutter to facilitate the separation of the left and right molds, and then cut off the connection between the cooling material in the branch flow channel and the injection molded product, so as to facilitate the demolding of the finished product.

Description

A pouring system for an injection mold

technical field

The utility model relates to the technical field of injection molds, in particular to a pouring system for injection molds.

Background technique

Injection mold is a tool for producing plastic products; it is also a tool for giving plastic products complete structure and precise dimensions. Injection molding is a processing method used in the mass production of certain complex-shaped parts. Specifically, it refers to injecting the heated and melted plastic into the mold cavity under high pressure from the injection molding machine, and after cooling and solidifying, a molded product is obtained. The injection mold is equipped with a gating system, also known as a runner system, which is a set of feed channels that guide the plastic melt from the nozzle of the injection machine to the cavity, usually consisting of a main channel and a runner.

In the process of demoulding the finished product in the existing injection mold, the condensate in the main channel of the gating system is easy to stick to the material in the injection port of the injection molding machine, resulting in material waste. At the same time, the condensate in the runner will connect with the finished product, implicating the finished product As a result, injection molded products are prone to defects.

Utility model content

In order to overcome the deficiencies of the prior art, the utility model provides a gating system for injection molds, which can cut off the connection between the main channel and the injection molding machine and the connection between the runner and the finished product during the demoulding process, so that the demoulding is more convenient and the finished product is less prone to defects .

In order to solve the above technical problems, the utility model provides the following technical solutions:

A pouring system for an injection mold, including a mold body and an injection molding machine, a movable left mold connected to a hydraulic drive is arranged on one side of the mold body, and a right mold is fixedly installed on the other side, and the inside of the right mold A sprue is provided, one end of the sprue is connected to the mold cavity of the right mold, and the other end is connected to the nozzle of the injection molding machine, and one side of the left mold is provided with a tap hole and a number of branch holes that are sealingly connected to the end of the sprue One end of the branch channel communicates with the tap hole, and the other end communicates with the cavity of the left mold; one side of the mold body is fixedly installed with a first hydraulic cylinder, and the first hydraulic cylinder is connected to the second hydraulic cylinder through a hydraulic telescopic rod. The cutting knife is driven and connected, and the first cutting knife is located above the interface between the main channel and the injection molding machine; the second hydraulic cylinder is installed on the side of the end of the sub-runner in the left mold, and the side wall of the sub-runner is installed There is a second cutter, and the second hydraulic cylinder is driven and connected with the second cutter through a hydraulic telescopic rod.

As a preferred technical solution of the present invention, the injection molding machine is connected to one end of the main flow channel through a tapered port.

As a preferred technical solution of the present invention, the interface between the injection molding machine and the main channel is installed with insulation cotton.

As a preferred technical solution of the utility model, a cold material cavity is provided at the end of the main channel.

As a preferred technical solution of the present invention, the main channel is arranged in the middle part of the right mold.

As a preferred technical solution of the present invention, several of the runners are evenly distributed in half on the left mould.

As a preferred technical solution of the present invention, a gate is provided at the end of the runner, the cross section of the gate is rectangular, and the cross-sectional area of the gate is smaller than that of the runner.

As a preferred technical solution of the present invention, the second cutter is installed in the side wall on one side of the gate.

Compared with the prior art, the beneficial effects that the utility model can achieve are:

The utility model is equipped with a hydraulically driven cutter at the interface between the main channel of the injection mold gating system and the injection molding machine and at the interface between the end of the runner and the mold cavity. After the injection molding is completed, the cooling material in the main channel can be cut off and the injection The connection of the materials in the machine facilitates the separation of the left and right molds, and then cuts off the connection between the cooling material in the runner and the injection molded product, which facilitates the demoulding of the finished product, and will not cause defects in the finished product due to the involvement of the cooling material in the runner.

Description of drawings

Fig. 1 is the structural representation of the working state of the present utility model;

Fig. 2 is a schematic diagram of the structure of the left mold of the utility model;

Among them: 1. Mold main body; 2. Injection molding machine; 3. Left mold; 4. Right mold; 5. First hydraulic cylinder; 6. Hydraulic telescopic rod; 7. First cutter; 8. Main channel; 9. Cone 10, tap hole; 11, runner; 12, gate; 13, second hydraulic cylinder; 14, mold cavity; 15, second cutter.

Detailed ways

The preferred embodiments of the present utility model are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described here are only used to illustrate and explain the present utility model, and are not intended to limit the present utility model.

Please refer to Figure 1-2, the gating system of an injection mold provided by the utility model includes a mold main body 1 and an injection molding machine 2, and a movable left mold connected to a hydraulic drive is arranged on one side of the mold main body 1 3. The right mold 4 is fixedly installed on the other side, and the inside of the right mold 4 is provided with a main flow channel 8. One end of the main flow channel 8 is connected to the cavity 14 of the right mold 4, and the other end is connected to the nozzle of the injection molding machine 2. The left mold One side of the 3 is provided with a tap hole 10 and a number of runners 11 that are sealed and connected to the end of the main channel 8. One end of the runner 11 communicates with the tap hole 10, and the other end communicates with the mold cavity 14 of the left mold 3; the mold body 1 The first hydraulic cylinder 5 is fixedly installed on the side of the first hydraulic cylinder 5, and the first hydraulic cylinder 5 is driven and connected with the first cutter 7 through the hydraulic telescopic rod 6. The first cutter 7 is located above the interface between the main channel 8 and the injection molding machine 2; the left mold 3 A second hydraulic cylinder 13 is installed on one side of the end of the internal runner 11, and a second cutter 15 is installed on the side wall of the runner 11, and the second hydraulic cylinder 13 is driven by the hydraulic telescopic rod 6 and the second cutter 15 connect.

The injection molding machine 2 is connected to one end of the main flow channel 8 through the tapered port 9, so that the diameter of the flow channel is gradually reduced, thereby increasing the flow rate of the material in the main flow channel. The interface between the injection molding machine 2 and the main flow channel 8 is equipped with thermal insulation cotton, which can keep the liquid material in the injection port of the injection molding machine warm and prevent it from cooling down. At the same time, it can prevent heat from diffusing into the mold and affect the cooling and molding of the material. The end of the sprue 8 is provided with a cold material pocket, which is used to catch the cold material generated between two injections at the end of the nozzle, so as to prevent the blockage of the runner or gate. The main channel 8 is arranged in the middle part of the right mold 4, and a plurality of sub-runners 11 are evenly distributed on the left mold 3 to facilitate the uniform diffusion of materials from the runners into the mold cavity. The end of the runner 11 is provided with a gate 12, the cross section of the gate 12 is rectangular, and the cross-sectional area of the gate 12 is smaller than that of the runner 11, so that the injection molded product is separated from the runner system at the gate position of the small section. The second cutter 15 is installed in the side wall on one side of the gate 12 .

Specifically, during injection molding, the hydraulic drive mechanism in the mold body 1 drives the left mold 3 to move to the right and closes with the right mold 4, and then the injection molding machine 2 is opened, and the heated and dissolved liquid materials are sequentially transported through the main channel 8 and the branch channel 11 to the After the left mold 3 and the right mold 4 are closed, the mold cavity 14 is cooled and molded; when the injection molding is completed, the first hydraulic cylinder 5 drives the first cutter 7 to go down, cut off the connection between the main channel 8 and the injection molding machine 2, and then drive the mold The hydraulic drive mechanism in the main body 1 drives the left mold 3 to move leftward, separates from the right mold 4, and the injection molded product is adsorbed on the left mold 3, and then the second hydraulic cylinder 13 drives the second cutter 15 to make it cut into the runner 11. The cooling material is cut and separated from the injection molded product, so that the cooling material in the runner 11 will not involve the finished product, which facilitates demoulding and subsequent processing of the finished product.

The utility model is equipped with a hydraulically driven cutter at the interface between the main channel of the injection mold gating system and the injection molding machine and at the interface between the end of the runner and the mold cavity. After the injection molding is completed, the cooling material in the main channel can be cut off and the injection The connection of the materials in the machine facilitates the separation of the left and right molds, and then cuts off the connection between the cooling material in the runner and the injection molded product, which facilitates the demoulding of the finished product, and will not cause defects in the finished product due to the involvement of the cooling material in the runner.

The embodiments of the present utility model are not limited thereto. According to the above-mentioned embodiments of the present utility model, the above preferred embodiments can also Other various forms of modification, substitution or combination are made, and other obtained embodiments all fall within the protection scope of the utility model.

Claims (8)

1. a pouring system of an injection mould, comprising a mold main body (1) and an injection molding machine (2), is characterized in that, a movable left mold ( 3), the other side is fixedly equipped with a right mold (4), the inside of the right mold (4) is provided with a sprue (8), and one end of the sprue (8) is connected to the mold cavity of the right mold (4) (14) is connected, and the other end is connected with the nozzle of the injection molding machine (2), and one side of the left mold (3) is provided with a tap hole (10) and several runners ( 11), one end of the runner (11) communicates with the tap hole (10), and the other end communicates with the mold cavity (14) of the left mold (3); one side of the mold body (1) is fixedly installed with a second A hydraulic cylinder (5), the first hydraulic cylinder (5) is driven and connected to the first cutter (7) through a hydraulic telescopic rod (6), and the first cutter (7) is located between the main channel (8) and Above the interface of the injection molding machine (2); a second hydraulic cylinder (13) is installed on one side of the runner (11) end in the left mold (3), and a second hydraulic cylinder (13) is installed on the side wall of the runner (11). The second cutter (15), the second hydraulic cylinder (13) is drivingly connected to the second cutter (15) through a hydraulic telescopic rod (6). 2. The gating system of the injection mold according to claim 1, characterized in that, the injection molding machine (2) is connected to one end of the sprue (8) through a tapered port (9). 3. The gating system of the injection mold according to claim 1, characterized in that, thermal insulation cotton is installed at the interface between the injection molding machine (2) and the main flow channel (8). 4. The gating system of the injection mold according to claim 1, characterized in that, a cold slug cavity is provided at the end of the sprue (8). 5. The pouring system of the injection mold according to claim 1, characterized in that, the sprue (8) is arranged in the middle of the right mold (4). 6. The gating system of the injection mold according to claim 5, characterized in that, several of the runners (11) are evenly distributed in half on the left mold (3). 7. The gating system of the injection mold according to claim 1, characterized in that, the end of the runner (11) is provided with a sprue (12), the cross section of the sprue (12) is rectangular, and the The cross-sectional area of the gate (12) is smaller than that of the runner (11). 8. The pouring system of an injection mold according to claim 7, characterized in that, the second cutter (15) is installed in a side wall on one side of the gate (12).