CN215882391U

CN215882391U - Injection mould

Info

Publication number: CN215882391U
Application number: CN202121804198.0U
Authority: CN
Inventors: 何高文
Original assignee: Ningbo Handao Electronic Co ltd
Current assignee: Ningbo Handao Electronic Co ltd
Priority date: 2021-08-02
Filing date: 2021-08-02
Publication date: 2022-02-22
Anticipated expiration: 2031-08-02

Abstract

The utility model discloses an injection mold, which is characterized by comprising a fixed template, wherein the upper surface of the fixed template is provided with a main runner and a lower mold core for molding an injection product, the fixed template is provided with an ejector pin extending out of the lower mold core, and the lower mold core is communicated with the main runner: the main runner is provided with an inverted runner which is obliquely arranged towards the direction of the lower die core, and the range of the inclination angle of the inverted runner and the upper surface of the fixed die plate is 20-60 degrees; the bottom of the inverted runner is a spherical curved surface, the number of the lower mold cores is even, the lower mold cores are symmetrically arranged on two sides of the main runner, the inverted runner on the two sides of the main runner is also symmetrically arranged, and when the injection molding product is ejected out by the ejector pin, the tailings in the inverted runner pull the tailings in the main runner, so that the tailings in the main runner have a time-delay action, and the injection molding product and the tailings in the main runner can be separated.

Description

Injection mould

Technical Field

The present invention relates to a mold, and more particularly, it relates to an injection mold.

Background

In the existing injection molding product, when the product is separated from the mold, the injection molded product and the runner are connected with each other, when the product is ejected by the ejector pin in the mold, the upper runner tailing of the runner and the product are ejected together, and then a worker cuts the plastic product and the runner tailing by tools such as pliers, which needs a great amount of labor for breaking the sprue at the runner tailing, and therefore, the labor is consumed greatly, and the production efficiency is low.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide an injection mold, when an ejector pin ejects an injection product, a tailing in a reversing flow channel pulls a tailing in a main flow channel, so that the tailing in the main flow channel has a time-delay action, and the injection product and the tailing of the main flow channel are separated.

The technical purpose of the utility model is realized by the following technical scheme:

an injection mold comprises a fixed template, wherein the upper surface of the fixed template is provided with a main runner and a lower mold core for molding a product, the fixed template is provided with an ejector pin capable of extending out of the lower mold core, the lower mold core is communicated with the main runner, the main runner is provided with an inverted runner which is obliquely arranged towards the direction of the lower mold core, and the range of the inclination angle of the inverted runner and the upper surface of the fixed template is 20-60 degrees; the bottom of the inverted runner is a spherical curved surface.

By adopting the technical scheme, when the product is jacked up by the thimble, the product rises to generate a pulling force to be positioned on the back of the inclined surface of the inverted flow channel due to the inclined inverted tailing formed in the inverted flow channel, the inverted tailing is separated from the upper surface of the flow guide flow channel, and the product and the tailing are separated due to the fact that the thickness of the connecting part of the product and the main flow channel is small; and then taking out the main tailings along the inverted flow channel by a mechanical claw. The spherical curved surface is used for enabling the bottom of the inverted wake to be smooth and facilitating the tailing to be taken out from the inverted runner.

Preferably, the inclination angle between the inverted runner and the upper surface of the fixed die plate is 45 degrees.

Through adopting above-mentioned technical scheme, 45 degrees slope contained angles, when the product breaks away from, the back-off runner has good fender performance to the tails. When the tailings are separated, the tailings can smoothly slide out of the inverted runner along the inclined angle of 45 degrees.

Preferably, the number of the lower mold cores is even, the lower mold cores are symmetrically arranged on two sides of the main flow passage, and the back-off flow passages on two sides of the main flow passage are also symmetrically arranged.

By adopting the technical scheme, the symmetrical arrangement is favorable for uniform stress of tailings in each inverted flow channel, and the tailings are more smooth when being separated from the inverted flow channels.

Preferably, the movable mould plate is provided with glue injection holes, and the inverted runner is symmetrically arranged around the center of the glue injection hole.

By adopting the technical scheme, when the tailings are taken out, the mechanical claw is mostly adopted to grab the material head at the position of the glue injection hole, so that the center of each inverted runner is symmetrical to the glue injection hole, the tailings in each inverted runner are uniformly stressed, and the tailings are more smoothly separated from the inverted runners.

Preferably, the fixed template is inserted with an inclined ejector rod, the upper end of the inclined ejector rod is arranged in the inverted buckle flow channel, the fixed template is provided with an ejector block, and a vertical ejector rod is arranged below the ejector block; the ejector block is provided with a slide way, the vertical ejector rod and the slide way are vertically arranged, and the lower end of the inclined ejector rod horizontally slides in the slide way.

Through adopting above-mentioned technical scheme, the tails in the back-off runner is assisted ejecting to the ejector pin to the slope for the tails is ejecting more smoothly.

Preferably, the slide is equipped with the overhead gage, and it has the slider to erect the ejector pin lower extreme and articulate, and the slider slides in the slide, and the overhead gage is arranged in the slider top.

Through adopting above-mentioned technical scheme, owing to the fender that separates of overhead gage, the slider slides more stably in the slide, and the oblique ejector pin pushes away the tails in the back-off runner and just is more smooth and easy.

In conclusion, the utility model has the following beneficial effects: the quality problem of the burr of the sprue can be solved; the tail material is separated from the product, so that the product can be adsorbed and taken away by the mechanical arm, and the quality problem of plastic scraps and foreign matters of the product is solved; the tail material on the product is not required to be cut off manually by using pliers, and the lubricating oil on the surfaces of the pliers is not required to be contacted with the product, so that the quality problem of the oil on the surfaces of the product can be solved; the phenomenon of flying in disorder when the product is ejected can be solved, so that the loss is reduced; after the improvement, the automatic production can be realized, and the product and the flow channel are separately placed by taking and placing through the matching of the mechanical arm, so that the labor cost is reduced.

Drawings

FIG. 1 is a schematic view of separation of a movable mold and a fixed mold plate according to embodiment 1;

FIG. 2 is a schematic view of injection molding of the product of example 1 with a main heel and a back-off heel;

FIG. 3 is a schematic view of the structure of FIG. 1 taken along line A-A;

FIG. 4 is an enlarged view of portion B of FIG. 3;

FIG. 5 is a cross-sectional view taken at C-C of FIG. 1;

FIG. 6 is a schematic view showing the structures of an oblique lift pin, a slide rail and a vertical lift pin in embodiment 2;

FIG. 7 is a schematic view showing the positional relationship between the vertical lift pins and the inverted runner in example 2.

In the figure:

1. moving the template; 11. injecting glue holes;

2. fixing a template; 21. a lower mold core; 22. a thimble;

31. a main flow channel; 32. reversing the flow channel;

4. an oblique ejector rod; 41. a slider;

51. a top block; 52. a vertical ejector rod;

61. a slideway; 62. an upper baffle plate;

7. producing a product; 8. main tailings; 9. and (4) reversing the tailings.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Embodiment 1, an injection mold, refer to fig. 1-5, includes a movable mold plate 1 and a fixed mold plate 2, the movable mold plate 1 is provided with a glue injection hole 11, the upper surface of the fixed mold plate 2 is provided with a main runner 31 and a lower mold core 21 for molding an injection product 7, the lower mold core 21 is communicated with the main runner 31, after the movable mold and the fixed mold are closed, an injection molding material flows in from the glue injection hole 11, and then flows into the lower mold core 21 and an upper mold core of the movable mold plate 1 through the main runner 31.

The main runner 31 is provided with inverted runners 32 which are obliquely arranged towards the lower mold core 21, and each inverted runner 32 corresponds to the position of each lower mold core 21. The inverted runner 32 is a branch of the main runner 31, the main runner 31 is communicated with the lower mold core 21, and the inverted runner 32 is obliquely arranged towards the lower mold core 21, so that an inlet of the inverted runner 32 is obliquely upward and deviates from the corresponding lower mold core 21. And the junction of the main runner 31 and the lower die core 21 is provided with a side gate, and the side gate enables the thickness of the junction of the product 7 and the main tail 8 to be smaller.

In this embodiment, there are 4

lower mold cores

21, 4 lower mold cores 21 are symmetrically arranged on both sides of the

main runner

31, 4 inverted runners 32 are symmetrically arranged on both sides of the main runner 31, and the inverted runners 32 are symmetrically arranged around the center of the glue injection hole 11.

The main runner 31 is provided with an inverted runner 32 which is obliquely arranged towards the direction of the lower mold core 21, and the inclination angle of the inverted runner 32 and the upper surface of the fixed mold plate 2 is 45 degrees; the bottom of the inverted flow path 32 is spherically curved. The fixed die plate 2 is provided with a thimble 22 extending out of the lower die core 21.

The fixed die plate 2 is provided with a hole, an ejector pin 22 is inserted in the hole, the ejector pin 22 is positioned at the lower die core 21, when the ejector pin 22 is ejected out, the product 7 can be ejected out, demoulding is realized, the ejector pin 22 can retract into the fixed die plate 2, and the ejector pin 22 can be driven by an air cylinder to realize up-and-down movement.

The working principle is as follows: after the injection molding is completed, the movable mold plate 1 is separated from the fixed mold plate 2, when the ejector pins 22 eject the injection molded product 7, the inverted tail material 9 is separated and blocked by the inner wall in the inverted flow channel 32, the inverted tail material 9 pulls the main tail material 8 in the main flow channel 31, so that the main tail material 8 in the main flow channel 31 has a delay action, and the ejector pins 22 continuously eject, so that the injection molded product 7 and the main tail material 8 of the main flow channel 31 can be separated.

After the product 7 and the main tailing 8 are separated, a mechanical claw matched with the injection molding machine can clamp the main tailing 8, and the main tailing 8 and the inverted tailing 9 are taken out of the fixed mold plate 2 together.

Embodiment 2 is different from embodiment 1 in that, referring to fig. 6 and 7, the fixed die plate 2 is provided with an inclined hole, the inclined hole of the fixed die plate 2 is inserted with the inclined post rod 4, the upper end of the inclined post rod 4 is placed in the inverted flow passage 32, and the inclined angle of the inclined hole of the fixed die plate 2 is the same as the inclined angle of the inverted flow passage 32. The upper end part of the inclined top rod 4 is hermetically connected with the bottom surface of the inverted flow passage 32, so that the plastic cannot leak at the sealing part of the inclined top rod 4 and the inverted flow passage 32 in a molten state.

The lower end of the vertical ejector rod 52 is hinged with a sliding block 41, the fixed die plate 2 is provided with an ejector block 51, the ejector block 51 is provided with a slideway 61, the slideway 61 is provided with an upper baffle plate 62, the sliding block 41 slides in the slideway 61, and the upper baffle plate 62 is arranged above the sliding block 41.

A vertical ejector rod 52 is arranged below the ejector block 51; the vertical push rod 52 and the slide way 61 are vertically arranged, and the lower end of the oblique push rod 4 horizontally slides in the slide way 61.

The vertical post rod 52 can move up and down under the action of the air cylinder, so that the oblique post rod 4 is pushed to enter and exit the inverted runner 32.

The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the utility model may occur to those skilled in the art without departing from the principle of the utility model, and are considered to be within the scope of the utility model.

Claims

1. The utility model provides an injection mold, includes fixed die plate (2), and the upper surface of fixed die plate (2) is equipped with lower mold core (21) that sprue (31) and shaping product (7) were used, and fixed die plate (2) are equipped with thimble (22) that can stretch out lower mold core (21), lower mold core (21) and sprue (31) intercommunication, characterized by: the main runner (31) is provided with an inverted runner (32) which is obliquely arranged towards the direction of the lower mold core (21), and the range of the inclination angle of the inverted runner (32) and the upper surface of the fixed mold plate (2) is 20-60 degrees; the bottom of the inverted runner (32) is a spherical curved surface.

2. The injection mold of claim 1, wherein: the inclined angle between the inverted runner (32) and the upper surface of the fixed template (2) is 45 degrees.

3. The injection mold of claim 2, wherein: the number of the lower mold cores (21) is even, the lower mold cores (21) are symmetrically arranged on two sides of the main flow passage (31), and the inverted flow passages (32) on two sides of the main flow passage (31) are also symmetrically arranged.

4. The injection mold of claim 3, wherein: the movable mould plate comprises a movable mould plate (1), wherein the movable mould plate (1) is provided with a glue injection hole (11), and inverted flow channels (32) are arranged around the center of the glue injection hole (11) in a symmetrical mode.

5. The injection mold of claim 1, wherein: an inclined ejector rod (4) is inserted into the fixed template (2), the upper end of the inclined ejector rod (4) is arranged in the inverted flow channel (32), the fixed template (2) is provided with an ejector block (51), and a vertical ejector rod (52) is arranged below the ejector block (51); the ejector block (51) is provided with a slide way (61), the vertical ejector rod (52) and the slide way (61) are vertically arranged, and the lower end of the inclined ejector rod (4) horizontally slides in the slide way (61).

6. The injection mold of claim 5, wherein: the slide way (61) is provided with an upper baffle (62), the lower end of the vertical ejector rod (52) is hinged with a sliding block (41), the sliding block (41) slides in the slide way (61), and the upper baffle (62) is arranged above the sliding block (41).