CN104943062B - Injection molding method of double-color injection molding part and injection mold for implementing method - Google Patents

Abstract

The invention discloses an injection molding method of a double-color injection molding piece and an injection mold, wherein the injection mold is arranged on an injection molding machine, the working state of the injection mold is controlled by the injection molding machine, the injection mold comprises a mechanical driving slide block mechanism, the mechanical driving slide block mechanism comprises a hard glue slide block component and a soft glue slide block component which are used for molding, and the hard glue slide block component and the soft glue slide block component respectively comprise a slide block body, a slide block insert, a spring, a shifting block, a locking block, a first positioner and a second positioner. The mechanical slide block is adopted to be reversely buckled, so that an oil cylinder is avoided, and the size and the thickness of a die are effectively reduced; the problem that the middle-small tonnage double-color rotary injection molding machine cannot mold the injection molding machine is solved, the control action of a mold opening slide block oil cylinder is omitted, the molding period is shortened, the mold and injection molding production cost is reduced, the problem that the traditional mechanical drive slide block cannot control the action sequence is solved, and the production of a multi-cavity double-color injection molding piece on the small injection molding machine is completed.

Description

Injection molding method for two-color injection molded parts and injection mold implementing the method

technical field

The invention relates to the technical field of mold manufacturing, in particular to an injection molding method for two-color injection molded parts and an injection mold implementing the method.

Background technique

Due to the requirements of appearance, function and cost, the internal structure of the existing two-color injection molded parts is becoming more and more complex, and more and more two-color injection molded parts are injected with two materials on the slider. But now there are mainly two driving modes of the slider mechanism: one is mechanical driving, and the other is hydraulic driving. The mechanical drive has the characteristics of simple design, low cost and good stability, while the hydraulic drive has a long stroke and is easy to control the action sequence of the slider. If two materials need to be injected on the slider, it is generally necessary to adopt a hydraulic drive design.

However, the hydraulic drive has the following disadvantages: complex design, high production cost, poor follow-up production stability, occupying space, will increase the tonnage of the injection molding machine for mold production, complex control of the injection molding machine, increase the injection molding cycle, error-prone machine adjustment, injection molding cost will improve.

With the increasing demand for consumer electronics products, the demand for small and medium tonnage two-color injection molded parts has also increased significantly. However, in order to produce two-color injection molded parts with reliable quality and low cost, it is necessary to greatly improve the hydraulic drive design commonly used in the traditional slider control action sequence. However, the traditional mechanical drive slider has the problem of not being able to control the action sequence, and there has been no suitable method to overcome it for a long time.

Contents of the invention

In view of the above problems, the object of the present invention is to provide a two-color injection molding method and an injection mold for implementing the method using traditional mechanically driven sliders to control the action sequence, reliable production quality, and low cost.

To achieve the above object, the technical solution adopted in the present invention is:

A method for injection molding of two-color injection molded parts, characterized in that it comprises the steps of:

(1) An injection molding machine and an injection mold are set, the injection mold is set on the injection molding machine, and its working state is controlled by the injection molding machine;

(2) A mechanical drive slider mechanism is set in the injection mold, and the mechanical drive slider mechanism includes a hard rubber slider assembly and a soft rubber slider assembly for molding, and the hard rubber slider assembly and the soft rubber slider assembly Each slider assembly includes a slider body, a slider insert, a spring, a dial block, a locking block, a first locator, and a second locator, and the soft rubber slider assembly also includes an oblique guide post;

(3) The injection molding machine closes the mold, and the hard rubber is injected into the injection molded parts. The hard rubber slider is connected with the locking block. The hard rubber slider is pressed by the locking block. The hard rubber mold is opened, and the hard rubber slider is maintained verb: move;

(4) The injection molding machine drives the injection mold to turn over, and a first locator is arranged under the hard rubber slider, and the movement state of the hard rubber slider remains unchanged under the action of the first locator;

(5) The injection molding machine closes the mold again, the inclined guide column on the soft rubber slider assembly presses the dial to insert into the slider, the soft rubber slider repeats the mold closing action of the hard rubber slider, and the soft rubber injection molding of the injection molded parts ;

(6) After the soft and hard rubber is injected, the inclined guide column moves the hard rubber slider to exit the reverse button of the product to the second positioning position, and the soft rubber slider repeats the action of the hard rubber slider to open the mold, and the product is ejected. Take out the injection molded part.

The injection mold is a multi-cavity mold.

Springs are set on the shifting blocks in the hard rubber slider and the soft rubber slider, which facilitates the reset of the inclined guide post after entering the slider when the mold is closed, and facilitates the mold opening action of the subsequent slider.

A two-color injection mold for implementing the above-mentioned molding method, the injection mold is set on an injection molding machine, and its working state is controlled by the injection molding machine, it is characterized in that the injection mold includes a mechanical drive slider mechanism, and the mechanical The driving slider mechanism includes a hard rubber slider assembly and a soft rubber slider assembly for molding, and the hard rubber slider assembly and the soft rubber slider assembly include a slider body, a slider insert, a spring, a shift block, The locking block and the first locator and the second locator.

The hard rubber slider on the hard rubber slider assembly is connected with the locking block, and when the hard rubber is molded, the hard rubber slider is pressed by the locking block.

The hard rubber slider on the hard rubber slider assembly is also connected to the first locator, and when the mold is overturned, the movement state of the hard rubber slider remains unchanged under the action of the first locator.

The soft rubber slider assembly also includes an oblique guide post, the oblique guide post presses the shifting block to be inserted into the sliding block, and the shifting block resets under the force of the spring.

The two-color injection mold is a multi-cavity mold.

The beneficial effects of the present invention are as follows: the present invention adopts the mechanical slider to release the undercut, avoids the use of the traditional oil cylinder, effectively reduces the size and thickness of the mold; overcomes the problem that the small and medium tonnage two-color rotary injection molding The control action of the mold opening slider cylinder is shortened, the molding cycle is shortened, the cost of mold and injection molding production is reduced, and the problem that the traditional mechanical drive slider cannot control the action sequence is overcome as a whole, and the use of multi-cavity two-color mold injection molding parts can be completed. The production of small and medium tonnage injection molding machines is a major improvement and application expansion of the traditional slider design.

The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

Description of drawings

Fig. 1 is an exploded view of the structure of the slider mechanism of the machine of the present invention;

Fig. 2 is a schematic diagram of the adhesive position of the hard rubber of the present invention and the slider mechanism after molding;

Fig. 3 is a schematic diagram of the glue position between the soft rubber of the present invention and the slider mechanism after molding;

(a), (b) and (C) in Fig. 4 are respectively the hard rubber 1, the soft rubber 2 and the overall schematic diagram of the injection molded part of the present invention.

Detailed ways

Embodiment: Referring to Figures 1 to 4, this embodiment provides a method for injection molding a two-color injection molded part, which includes the following steps:

(1) An injection molding machine and an injection mold are set, the injection mold is set on the injection molding machine, and its working state is controlled by the injection molding machine;

(2) A mechanical drive slider mechanism is set in the injection mold, and the mechanical drive slider mechanism includes a hard rubber slider assembly and a soft rubber slider assembly for molding, and the hard rubber slider assembly and the soft rubber slider assembly The slider assembly includes slider body 301, 401, slider insert 302, spring 303, dial 304, locking block 305, first locator 306 and second locator 307, and the soft rubber slider assembly also An inclined guide post 308 is provided;

(3) The injection molding machine closes the mold, the hard rubber slider 301 is connected with the locking block, the hard rubber slider 301 is pressed by the locking block 305, and the hard rubber injection molding of the injection molded part is molded, and the hard rubber is molded, and the slider 301 Since there is no slanted guide post 308 to move, the hard rubber slider remains motionless;

(4) The injection molding machine drives the injection mold to turn over 180 degrees, and a first locator 306 is arranged under the hard rubber slider 301, and the stroke of the hard rubber slider 301 remains unchanged under the action of the first locator 306;

(5) The injection molding machine closes the mold again, the inclined guide post 308 on the soft rubber slider assembly presses the dial 304 to insert into the slider, and the soft rubber slider 401 repeats the mold closing action of the hard rubber slider 301. Soft plastic injection molding;

(6) After the soft and hard rubber is injected, the inclined guide column 308 moves the hard rubber slider 301 to move out of the reverse button of the product to the second positioning 307 position, and the soft rubber slider 401 repeats the action of the hard rubber slider 301 to open the mold , eject the product, and take out the injection molded part.

The injection mold is a multi-cavity mold.

The shifting block 304 in the hard rubber slider 301 and the soft rubber slider 401 is provided with a spring 303, which facilitates the reset of the inclined guide post 308 after entering the slider when the mold is closed, and facilitates the subsequent mold opening action of the slider.

A two-color injection mold for implementing the above method, the injection mold is set on the injection molding machine, and its working state is controlled by the injection molding machine, the injection mold includes a mechanical driving slider mechanism, and the mechanical driving slider mechanism includes Formed hard rubber slider assembly and soft rubber slider assembly, the hard rubber slider assembly and soft rubber slider assembly all include slider body 301, 401, slider insert 302, spring 303, dial 304, lock The tight block 305 and the first locator 306 and the second locator 307 .

The hard rubber slider on the hard rubber slider assembly is connected with the locking block. When the hard rubber is molded, the hard rubber slider 301 is pressed by the locking block 305 .

The hard rubber slider on the hard rubber slider assembly is also connected to the first locator 306, and when the mold is turned over, the movement state of the hard rubber slider 301 remains unchanged under the action of the first locator 306.

The soft rubber slider assembly further includes an oblique guide post 308 , the oblique guide post 308 presses the dial 304 to be inserted into the slider, and the dial 304 resets under the force of the spring 303 .

The two-color injection mold is a multi-cavity mold.

The technical problem solved by this embodiment is: by improving the design of the traditional mechanical drive slider, the action sequence of the slider can be controlled after the improvement, so that when the two-color mold is opened after the first color injection of hard plastic The slider remains still, and the mold rotates to close the mold and inject soft rubber/open the mold/slider exit/product ejection, thus achieving the effect of using traditional mechanically driven sliders to control the sequence of actions.

The invention adopts the mechanical slider to directly release the undercut, avoids the use of the oil cylinder, effectively reduces the size and thickness of the mold; overcomes the problem that the small and medium tonnage two-color rotary injection molding machine cannot be molded, and saves the need for the mold opening slider oil cylinder The control action shortens the molding cycle, reduces the production cost of molds and injection molding, overcomes the problem that the traditional mechanical drive slider cannot control the action sequence, and completes the production of multi-cavity two-color mold injection parts on small injection molding machines.

The above are only preferred feasible embodiments of the present invention, and are not intended to limit the patent scope of the present invention, so all equivalent structural changes made by using the content of the description of the present invention are included in the protection scope of the present invention.

Claims (2)

1. A two-color injection molded part injection molding method, is characterized in that, it comprises the steps: (1) An injection molding machine and an injection mold are set, the injection mold is arranged on the injection molding machine, and its working state is controlled by the injection molding machine; the two-color injection mold is a multi-cavity mould; (2) A mechanical drive slider mechanism is set in the injection mold, and the mechanical drive slider mechanism includes a hard rubber slider assembly and a soft rubber slider assembly for molding, and the hard rubber slider assembly and the soft rubber slider assembly Each slider assembly includes a slider body, a slider insert, a spring, a dial block, a locking block, a first locator and a second locator, and the soft rubber slider assembly also includes an oblique guide post; (3) The injection molding machine closes the mold, and the hard rubber is injected into the injection molded parts. The hard rubber slider is connected with the locking block. The hard rubber slider is pressed by the locking block. The hard rubber mold is opened, and the hard rubber slider is maintained verb: move; (4) The injection molding machine drives the injection mold to turn over, and a first locator is arranged under the hard rubber slider, and the movement state of the hard rubber slider remains unchanged under the action of the first locator; (5) The injection molding machine closes the mold again, the inclined guide column on the soft rubber slider assembly presses the dial to insert into the slider, the soft rubber slider repeats the mold closing action of the hard rubber slider, and the soft rubber injection molding of the injection molded parts ; (6) After the soft and hard rubber is injected, the inclined guide column moves the hard rubber slider to exit the reverse button of the product to the position of the second positioner, and the soft rubber slider repeats the action of the hard rubber slider to open the mold, and ejects Product, take out the injection molded part; Springs are set on the shifting blocks in the hard rubber slider and the soft rubber slider, which facilitates the reset of the inclined guide post after entering the slider when the mold is closed, and facilitates the mold opening action of the subsequent slider. 2. A two-color injection mold for implementing the molding method of claim 1, the injection mold is arranged on the injection molding machine, and its working state is controlled by the injection molding machine, wherein the injection mold includes a mechanically driven slider mechanism, the mechanical drive slider mechanism includes a hard rubber slider assembly and a soft rubber slider assembly for molding, and the hard rubber slider assembly and the soft rubber slider assembly include a slider body and a slider insert , spring, shift block, locking block, first locator and second locator; the hard rubber slider on the hard rubber slider assembly is connected with the locking block, and when the hard glue is molded, the hard rubber slider is made of The locking block is compressed; the hard rubber slider on the hard rubber slider assembly is also connected with the first locator, and when the mold is overturned, the motion state of the hard rubber slider remains unchanged under the action of the first locator; The soft rubber slider assembly also includes an oblique guide post, which presses the dial to be inserted into the slider, and the dial resets under the force of a spring; the two-color injection mold is a multi-cavity mould.