A gate mechanism for an injection mold

Abstract

The present invention provides a glue feeding mechanism for an injection mold, which includes a female mold, a male mold, a glue feeding mechanism and an ejection mechanism: Among them, a main injection channel is opened in the female mold; the male mold is arranged at a relative position of the female mold, and the female mold and the male mold cooperate to form a product cavity. The glue feeding mechanism is arranged between the female mold and the male mold and includes a main channel, a transfer channel and a glue feeding channel. The first pipeline part of the transfer channel is arranged at the corresponding positions of the male and female molds. The first pipeline extends into the space between the male and female molds at the corresponding positions respectively. Its second pipeline is recessed into the male mold, and the position of the second pipeline corresponds to the placement position of the metal part. The glue feeding channel is arranged in the male mold. The male mold is also provided with an ejection mechanism, including an inclined pin, a round ejector pin and a square ejector pin. One end of the inclined pin is "C"-shaped to wrap the second pipeline of the transfer channel. The beneficial effect of the present invention is to simplify the mold structure, reduce the weight of the sprue, shorten the product cooling and forming cycle, and save costs.

Description

Technical Field

[0001] The present invention relates to the technical field of molds, and in particular to a glue feeding mechanism for an injection mold.

Background Art

[0002] Metal-plastic integrated components are now widely used in various electronic products. When injecting such components, metal parts need to be placed inside the mold, and the placed metal parts often interfere with the glue feeding runner. Currently, the common method to solve the above problems is to adopt the point glue feeding method of a three-plate mold. However, the mold adopting this glue feeding method often has a complex structure, a large weight of the material head, a long cooling and forming cycle, and an increased processing cost.

[0003] Therefore, it is necessary to improve the existing technology.

Summary of the Invention

[0004] The technical problem to be solved by the present invention is the problems of complex mold structure, large weight of the material head, long cooling and forming cycle, and high processing cost. The present invention provides a glue feeding mechanism for an injection mold to solve the above problems.

[0005] The solution of the present invention to solve its technical problem is: a glue feeding mechanism for an injection mold, including a female mold, a male mold, an ejection mechanism and a glue feeding mechanism:

[0006] Among them, a main glue injection runner is opened in the female mold, and plastic enters from the main runner during injection molding;

[0007] The male mold is arranged at a relative position to the female mold. The male mold and the female mold are provided with product mold cavities at corresponding positions according to the shape of the product. The product mold cavities extend into the space between the male and female molds at corresponding positions. The male mold is further provided with an ejection mechanism, including a round ejector pin, a square ejector pin and an inclined pin;

[0008] The glue feeding mechanism is arranged between the female mold and the male mold, and includes a main runner, a transfer runner and a glue feeding runner. The main runner is arranged through the female mold. The transfer runner is arranged between the male mold and the female mold. The transfer runner includes a first pipeline and a second pipeline. The first pipeline is arranged at the corresponding positions of the male and female molds, and the first pipeline extends into the space between the male and female molds at corresponding positions. The second pipeline is recessed into the male mold, and the position of the second pipeline corresponds to the metal part placement position. The glue feeding runner is arranged in the male mold. The product mold cavity is connected to one end of the transfer runner through the glue feeding runner. The other end of the transfer runner far from the glue feeding runner is connected to the main runner.

[0009] Preferably, the round ejector pin, the square ejector pin and the inclined pin are arranged at the bottoms of the product mold cavity, the glue feeding runner and the transfer runner, and one end of the inclined pin is in a "C" shape to wrap the second pipeline of the transfer runner.

[0010] Preferably, a positioning pin is also provided in the male mold for positioning the metal part on the male mold, and a positioning pin receiving hole is provided in the female mold at the relative position of the positioning pin for receiving the part of the positioning pin that penetrates through the metal part.

[0011] The beneficial effects of the present invention are to simplify the mold structure, reduce the weight of the sprue, shorten the product cooling and forming cycle, and save costs.

BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 is an overall schematic diagram of the glue injection mechanism of an injection mold of the present invention.

[0013] Figure 2 is a schematic diagram of the structure of the glue injection mechanism of an injection mold of the present invention.

[0014] Figure 3 is a top view of the male mold of the glue injection mechanism of an injection mold of the present invention.

[0015] Figure 4 is a sectional view taken along the A-a plane when the injection mold of the present invention is in the closed mold state for the glue injection mechanism.

[0016] Figure 5 is a sectional view taken along the B-b plane when the injection mold of the present invention is in the closed mold state for the glue injection mechanism.

[0017] Figure 6 is a sectional view taken along the C-c plane when the injection mold of the present invention is in the closed mold state for the glue injection mechanism.

[0018] Figure 7 is a sectional view taken along the D-d plane when the injection mold of the present invention is in the closed mold state for the glue injection mechanism.

[0019] Figure 8 is a schematic diagram of the female mold of the glue injection mechanism of an injection mold of the present invention.

DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] To further elaborate on the technical means and effects adopted by the present invention, the following describes it in detail in combination with the embodiments and the accompanying drawings of the present invention.

[0021] As Figures 1-7As shown in the figure, the present invention provides a glue feeding mechanism for an injection mold, which includes a female mold 1, a male mold 2, an ejection mechanism 3 and a glue feeding mechanism 4. Among them, a main glue injection channel 40 is opened in the female mold 1, and plastic enters from the main channel 40 during injection molding. The male mold 2 is arranged at a relative position to the female mold 1. The male mold 2 and the female mold 1 are provided with a product mold cavity 5 at the corresponding positions according to the shape of the product. The product mold cavity 5 extends into the space between the male and female molds at the corresponding positions. The male mold 2 also has an ejection mechanism 3, including a round ejector pin 30, a square ejector pin 31 and an inclined pin 32. The glue feeding mechanism 4 is arranged between the female mold 1 and the male mold 2, and includes a main channel 40, a transfer channel 41 and a glue feeding channel 42.

[0022] The main channel 40 is arranged through the female mold 1. The transfer channel 41 is arranged between the male mold 2 and the female mold 1. The transfer channel 41 includes a first pipeline 410 and a second pipeline 411. The first pipeline 410 is arranged at the corresponding positions of the male and female molds. The first pipeline 410 extends into the space between the male and female molds at the corresponding positions. The second pipeline 411 is recessed into the male mold 2. The position of the second pipeline 411 corresponds to the metal part placement area to prevent interference with the metal part. The glue feeding channel 42 is arranged in the male mold 2. The product mold cavity 5 is connected to one end of the transfer channel 41 through the glue feeding channel 42. The other end of the transfer channel 41 away from the glue feeding channel 42 is connected to the main channel 40. When injecting the product, plastic is injected from the main channel 40 on the female mold 1, and sequentially enters the product mold cavity 5 through the transfer channel 41 and the glue feeding channel 42.

[0023] The round ejector pin 30, the square ejector pin 31 and the inclined pin 32 are arranged at the bottom of the product mold cavity 5, the glue feeding channel 42 and the transfer channel 41, and are used to eject the product after injection molding. One end of the inclined pin 32 is in a "C" shape to wrap the second pipeline 411 of the transfer channel 41. After wrapping, the surface of the inclined pin 32 does not protrude from the male mold 2 to avoid interference with the metal part. After the product is injection molded, the inclined pin 32 exits in the opposite direction of wrapping the second pipeline 411 of the transfer channel 41, and the ejector pin ejects the product and the material head.

[0024] A positioning pin 20 is also arranged in the male mold 2 to position the metal part on the male mold 2. A positioning pin receiving hole 10 is arranged at the relative position of the female mold 1 to the positioning pin 20 to receive the part of the positioning pin 20 passing through the metal part, which can also play a certain fixing role. The male mold 2 and the female mold 1 are provided with protrusions or depressions on the opposite surfaces of the metal part placement position according to the shape of the metal part to ensure complete clamping of the male and female molds.

[0025] The following takes the example of injection molding four products at one time to illustrate the specific working process of the present invention: Correspondingly, there are four product cavities 5 and two glue feeding runners 42. The main runner 40 is connected to the middle of the transfer runner 41. The two ends of the transfer runner 41 are respectively connected to the middle of the two glue feeding runners 42. The two ends of the two glue feeding runners 42 are respectively connected to the four product cavities 5. Before injection molding, the metal parts to be retained in the finished products are located at the four corners of a metal piece. The size of the metal piece is adapted to the position of the product cavity 5 for taking. After the products are processed, the finished products can be disconnected from the metal piece. When placing the metal piece, the four corners of the metal piece need to be placed beside the product cavity 5, and the connection part of the metal and plastic of the finished product is placed in the product cavity 5. Then, the metal piece is positioned on the male mold 2 with the positioning pin 20. After the metal piece is positioned, the male and female molds are closed. After closing the molds, injection molding starts. The plastic enters from the main runner 40 on the female mold 1, and successively passes through the transfer runner 41 and the glue feeding runner 42 to enter the product cavity 5. After injection molding and cooling, the ejection mechanism 3 acts to eject the products and the material heads.

[0026] After the products are taken out, the unnecessary plastic material head parts and metal parts can be cut off to obtain the finished products.

[0027] In summary, the beneficial effects of the present invention are to simplify the mold structure, reduce the weight of the material head, shorten the product cooling and forming cycle, and save costs.

[0028] It should be noted that the present invention is not limited to the above embodiments. Any simple modifications, equivalent changes and modifications made by any person skilled in the art to the above embodiments based on the technical solution of the present invention all fall within the protection scope of the present invention.

Claims

1. A glue feeding mechanism for an injection mold, characterized in that: It includes mother mold, male mold, ejection mechanism and glue feeding mechanism: Among them, the mother mold has a main injection channel, and the plastic enters from the main channel during injection; The male mold is arranged at a relative position to the female mold. The male mold and the female mold are provided with product mold cavities at corresponding positions according to the shape of the product. The product mold cavities extend between the male and female molds at corresponding positions. The male mold is also provided with an ejection mechanism, including a round ejector pin, a square ejector pin and an oblique pin; The glue feeding mechanism is arranged between the female mold and the male mold, and includes a main flow channel, a transfer flow channel and a glue feeding flow channel. The main flow channel is arranged through the female mold, and the transfer flow channel is arranged between the male mold and the female mold. The transfer flow channel includes a first pipeline and a second pipeline. The first pipeline is arranged at corresponding positions of the male and female molds, and the first pipeline extends between the male and female molds at corresponding positions. The second pipeline is recessed into the male mold, and the position of the second pipeline corresponds to the position where the metal parts are placed. The glue feeding flow channel is arranged in the male mold, and the product mold cavity is connected to one end of the transfer flow channel through the glue feeding flow channel. The other end of the transfer flow channel away from the glue feeding flow channel is connected to the main flow channel; The round ejector pin, square ejector pin and oblique pin are arranged at the bottom of the product mold cavity, the glue delivery channel and the transfer channel. One end of the oblique pin is in a "C" shape and wraps the second pipeline of the transfer channel.

2. The glue feeding mechanism of the injection mold according to claim 1, characterized in that: The male mold is also provided with a positioning pin for positioning the metal part on the male mold, and the female mold is provided with a positioning pin accommodating hole at the relative position of the positioning pin for accommodating the part of the positioning pin that passes through the metal part.

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