CN111673991A - Ejector structure of injection mold - Google Patents

Abstract

The invention discloses an ejection structure of an injection mold, including a front mold and a rear mold, a side slider inserting mechanism, an interlocking mechanism and an ejector mechanism; the side slider inserting mechanism includes an oblique guide rod, a slider and an inserting needle; The oblique guide rod is arranged on the front mold, and the sliding block is slidably fitted on the rear mold and guided and matched with the oblique guide hole; the insert needle is arranged on the sliding block; the ejector mechanism includes an ejector plate and an ejector cylinder assembly; the interlock mechanism includes a return spring , limit block, first limit rod and second limit rod; the return spring is arranged between the ejector plate and the backing plate of the rear mold; the first end of the first limit rod is fixed on the side wall of the front mold, The second end extends to the side wall of the rear mold; the limit block is fixed on the side wall of the ejector plate; the first end of the second limit rod is rotatably connected to the side wall of the fixing plate, and the second end can be swingably arranged, and When the front mold and the rear mold are in the mold opening state, the side wall of the first limit rod is released from the abutment of the second limit rod. The invention has the characteristics of convenient demoulding and high demoulding efficiency.

Description

Ejector structure of injection mold

technical field

The invention relates to the field of molds, and more particularly to an ejection structure of an injection mold.

Background technique

Injection mold is a tool for producing plastic products, and 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 some complex-shaped parts. Specifically, it refers to the injection of the heated and melted plastic into the cavity of the injection molding machine at high pressure, and after cooling and solidification, a molded product is obtained.

In the prior art, when injecting an injection molded part with a groove or an opening on the side, it is necessary to set a side slide bar insert. Open your mouth. When the molded injection part is demolded, it is necessary to open the mold first, then use the side sliding mechanism to slide the slider insert out of the injection part, and finally use the ejector pin or the cylinder pin to push the injection part from the back mold core. out to achieve the effect of demoulding. When the above-mentioned injection molded parts are demolded, the demolding operation is cumbersome, resulting in low demolding efficiency, so there is room for improvement.

SUMMARY OF THE INVENTION

In view of the deficiencies of the prior art, the present invention provides an ejection structure of an injection mold, which has the characteristics of convenient demolding, high demolding efficiency, and safe use.

For achieving the above object, the present invention provides the following technical solutions:

An ejection structure of an injection mold includes a front mold and a rear mold, the front mold includes a front bottom plate and a front mold base, and the rear mold includes a rear mold base, a backing plate, a fixed plate, a support plate, and a rear bottom plate, which are arranged in sequence. It has two pieces and forms a moving cavity between the fixed plate and the rear bottom plate, and a cavity is formed between the front mold base and the rear mold base. ;

The side-slider needle-inserting mechanism includes an oblique guide rod, a sliding block and an inlaid needle; the oblique guide rod is arranged on the front mold, and the front end rod body of the oblique guide rod is located outside the front mold; the slider is slidably fitted to the rear mold on the mold, and has an oblique guide hole that guides and cooperates with the front end rod body of the oblique guide rod located outside the front mold, and when the front mold moves relative to the rear mold, the oblique guide rod drives the slider to move relative to the cavity; the insert pin is set On the side of the slider facing the cavity;

The ejector mechanism includes an ejector plate and an ejector cylinder assembly; the ejector plate is located in the moving cavity, and is movably arranged in the moving cavity toward or away from the front mold; the upper end of the ejector cylinder assembly is connected to the cavity Or the main channel corresponds, and the lower end is supported on the thimble plate;

The interlocking mechanism includes a reset spring, a limit block, a first limit rod and a second limit rod; the reset spring is arranged between the ejector plate and the backing plate; the first end of the first limit rod It is fixed on the side wall of the front mold, and the second end extends to the side wall of the rear mold; the limit block is fixed on the side wall of the ejector plate; the first end of the second limit rod is rotatably connected to the fixing plate On the side wall of the , the second end can swing and can abut against the first limit rod and the limit block, and the length of the second limit rod is greater than the length of the second limit rod from the first end to the first limit rod. The distance of the limit rod is greater than the distance from the first end of the second limit rod to the limit block, and when the front mold and the rear mold are in the open state, the side wall of the first limit rod is separated from the second limit rod 's abutment.

Preferably, the side wall of the rear mold frame facing the front mold frame is provided with a guide chute for sliding fit of the slider, and the bottom wall of the guide chute has an inclined guide section.

Preferably, the inclined guide segment has a positioning groove into which the head of the inclined guide rod is inserted.

Preferably, the rear mold frame includes a push plate and a mold core; the slider is slidably fitted on the push plate, and a side wall of the slider facing the mold core has a mounting hole, and a mounting hole is provided in the mounting hole that can abut against the mold core. Buffer spring to the outer side wall of the mold core.

Preferably, a pressing bolt is provided on the front mold frame, and when the front mold and the rear mold are in a clamping state, the end of the pressing bolt is pressed against the slider.

The advantages of the present invention are: when the front mold and the rear mold are opened, the sliding block moves away from the cavity through the cooperation of the oblique guide rod and the oblique guide hole, so that the insert pin is separated from the cavity, so the ejector can be used. The mechanism can directly eject the injection molded parts, which is easy to eject and improves the ejection efficiency of the injection molded parts; during the mold clamping process, the ejector cylinder assembly is driven to leave the cavity first by the reset mechanism, and then the mold is closed and reset. The interlocking effect is achieved, the problem of collision between the upper end of the thimble cylinder assembly and the insert needle is avoided, and the safety of the present invention is significantly improved.

Description of drawings

Fig. 1 is the schematic diagram of the ejection structure of the injection mold provided by this embodiment;

FIG. 2 is another schematic diagram of the ejection structure of the injection mold provided in this embodiment.

Detailed ways

The ejection structure of the injection mold of the present invention will be further described with reference to FIG. 1 to FIG. 2 .

An ejection structure of an injection mold includes a front mold and a rear mold, the front mold includes a front bottom plate 1 and a front mold base 2, and the front mold base 2 includes a front template 22 and a front mold core 21 installed in the front template 22; The mold includes a rear mold base 3, a backing plate 4, a fixed plate 5, a support plate 6 and a rear bottom plate 8 arranged in sequence. The support plate 6 has two pieces and forms a moving cavity 7 with the fixed plate 5 and the rear bottom plate 8. The front mold A cavity is formed between the frame 2 and the rear mold frame 3 . The four top corners of the injection mold are provided with guide rods 14 , and the front mold base 2 and the rear mold base 3 are both connected with guide blocks slidably matched with the guide rods through bolts.

The ejection structure of the injection mold also includes a side slider inserting mechanism 11 , an interlocking mechanism 13 and an ejecting mechanism.

The side slider needle inserting mechanism 11 includes an oblique guide rod 112, a slider 111 and an insert needle 113; the rear end rod body of the oblique guide rod 112 is fixed in the front mold, and the front end rod body is located outside the front mold; The block 111 is slidably fitted to the rear mold base 3, and has an oblique guide hole for guiding and matching with the front end rod body of the oblique guide rod 112 located outside the front mold, and when the rear mold moves relative to the front mold, the oblique guide rod 112 drives the slider 111 relative to move in the cavity; the insert pin 113 is arranged on the side of the slider 111 facing the cavity.

The ejector mechanism includes an ejector plate 9 and an ejector cylinder assembly 10; the ejector plate 9 is located in the moving cavity 7, and is movably arranged in the moving cavity 7 toward or away from the cavity; the ejector cylinder assembly The upper end of 10 corresponds to the main channel and the cavity, and the lower end is supported on the ejector plate 9 .

The interlocking mechanism 13 includes a return spring 134, a limit block 133, a first limit rod 131 and a second limit rod 132; the return spring is arranged between the ejector plate 9 and the backing plate 4; the first The first end of the limit rod 131 is fixed on the side wall of the front mold frame 2 by bolts, and the second end extends to the side wall of the rear mold; the limit block 133 is fixed on the side wall of the ejector plate 9 by bolts; The first end of the second limit rod 132 is rotatably connected to the side wall of the fixed plate 5 through a pin rod and a torsion spring, and the second end is rotatably arranged and can abut against the first limit rod in the clamping state The side wall of 131 and the stopper block 133 can abut against. The length of the second limit rod 132 is greater than the distance from the first end of the second limit rod 132 to the first limit rod 131, and is greater than the second limit rod The distance from the first end of 132 to the limiting block 133, and when the front mold and the rear mold are in the open state, the side wall of the first limiting rod 131 is released from the abutment of the second end of the second limiting rod 132.

When the present invention is in the clamping state, the head of the insert pin 113 is located in the cavity, the ejector pin plate 9 is located below the moving cavity 7, the ejector pin 102 in the ejector pin cylinder assembly 10 is not in contact with the main channel, and the ejector cylinder 101 does not enter into the cavity, the limit block 133 abuts against the second end of the second limit rod 132 , and the second limit rod 132 is in an inclined state and its second end is supported on the side wall of the first limit rod 131 form fixed. In this state, under the action of the first limit rod 131, the second limit rod 132, the return spring 134 and the limit block 133, the ejector plate 9 cannot move toward the front mold, effectively preventing the ejector cylinder assembly 10 from accidentally ejecting material Or top mainstream issues.

During the mold opening operation, the driving part in the injection molding machine is connected with the guide block 15 to drive the rear mold to move linearly relative to the front mold. During the moving process, the inclined guide rod 112 synchronously drives the slider 111 to move away from the cavity, so that the needle inserts 113 is separated from the cavity; after moving to a certain distance, the side wall of the first limit rod 131 is separated from the second end of the second limit rod 132, so that the second end of the second limit rod 132 abuts against the first limit At the lower end of the rod 131, at the same time, the second end of the second limit rod 132 is rotated at a certain angle toward the front mold, so as to reserve space for the ejector plate 9 to move toward the front mold; The rear bottom plate 8 is supported on the ejector plate 9 and pushes the ejector plate 9 and the ejector cylinder assembly 10 to move toward the front mold, so as to push the injection molded part and the sprue out of the rear mold base 3 .

During the mold clamping operation, the injection molding machine drives the rear mold to move toward the front mold. During the movement, the second end of the first limit rod 131 presses against the second end of the second limit rod 132, so that the The second end rotates downward, which drives the ejector plate 9 and the ejector cylinder assembly 10 to move away from the front mold, so that the inserting needle 113 and the main runner are safely reset.

This embodiment is further configured as follows: the side wall of the rear mold frame 3 facing the front mold frame 2 has a guide chute 31 for slidingly fitting the slider 111 , and the bottom wall of the guide chute 31 has an inclined guide section 311 . The arrangement of the guide chute 31 can improve the stability of the movement of the slider 111, and the arrangement of the inclined guide section 311 can realize the oblique entry and exit of the insert needle 113 into the cavity.

In this embodiment, it is further configured that: the inclined guide section 311 has a positioning groove 3111 into which the head of the inclined guide rod 112 is inserted. When the front mold and the rear mold are in the mold clamping state, the head of the oblique guide rod 112 is located in the positioning groove, and this structure can improve the stability of the oblique guide rod 112 to limit the sliding block 111, thereby improving the sliding block 111 during the injection molding process. In order to improve the quality of product injection molding.

This embodiment is further configured as follows: the rear mold frame 3 includes a push plate 32 and a mold core 33 ; the slider 111 is slidably fitted on the push plate 32 , and a side wall of the slider 111 facing the mold core 33 has a mounting hole , the installation hole is provided with a buffer spring 16 that can abut against the outer wall of the mold core 33 . Under this structure, the slider 111 and the mold core 33 can be protected to avoid the problem of damage due to collision between the two during mold clamping.

This embodiment is further configured as follows: the front mold frame 2 is provided with a compression bolt, and when the front mold and the rear mold are in a clamping state, the end of the compression bolt is pressed against the slider 111 . This structure can further improve the stability of the slider 111 in the state of the nuclear membrane, so as to further improve the quality of the injection molding.

Unless otherwise specified, in the present invention, if the terms "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", " The orientation or positional relationship indicated by top, bottom, inner, outer, clockwise, counterclockwise, axial, radial, circumferential, etc., is based on the drawings. The orientation or positional relationship shown is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the indicated device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore the orientation or The terms of the positional relationship are only used for exemplary description, and should not be construed as a limitation on the present patent. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to specific situations with reference to the drawings.

Unless otherwise specified and limited, in the present invention, the terms "arranged", "connected" and "connected" should be understood in a broad sense, for example, it may be a fixed connection, a detachable connection, or an integral connection ; It can be directly connected, or indirectly connected through an intermediate medium, and it can be the internal connection of two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood in specific situations.

The above are only the preferred embodiments of the present invention, and the protection scope of the present invention is not limited to the above-mentioned embodiments, and all technical solutions under the idea of the present invention belong to the protection scope of the present invention. It should be pointed out that for those skilled in the art, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims (5)

1. The utility model provides an injection mold's ejecting structure, includes front mould and back mould, and the front mould includes preceding bottom plate and preceding die carrier, and back mould is including back die carrier, backing plate, fixed plate, backup pad and the back bottom plate of arranging in proper order, the backup pad have two and fixed plate and back bottom plate between form the removal chamber, form die cavity, characterized by between preceding die carrier and the back die carrier: the side slide block pin embedding mechanism, the interlocking mechanism and the material ejecting mechanism are also included;

the side slide block pin embedding mechanism comprises an oblique guide rod, a slide block and an embedding pin; the oblique guide rod is arranged on the front die, and a rod body at the front end of the oblique guide rod is positioned outside the front die; the slide block is matched on the rear die in a sliding manner and is provided with an oblique guide hole which is in guiding fit with a front end rod body of the oblique guide rod positioned outside the front die, and when the front die moves relative to the rear die, the oblique guide rod drives the slide block to move relative to the cavity; the insert pin is arranged on one side of the slide block facing the cavity;

the material ejecting mechanism comprises an ejector plate and an ejector sleeve assembly; the ejector pin plate is positioned in the moving cavity and is movably arranged towards or back to the front mold in the moving cavity; the upper end of the ejector sleeve component corresponds to the cavity or the main runner, and the lower end of the ejector sleeve component is supported on the ejector plate;

the interlocking mechanism comprises a return spring, a limiting block, a first limiting rod and a second limiting rod; the reset spring is arranged between the ejector pin plate and the base plate; the first end of the first limiting rod is fixed on the side wall of the front die, and the second end of the first limiting rod extends to the side wall of the rear die; the limiting block is fixed on the side wall of the ejector plate; the first end of second gag lever post rotates to be connected on the lateral wall of fixed plate, and the second end can swing the setting and can support to lean on to first gag lever post and can supply the stopper to support and lean on, and the length of second gag lever post is greater than the first end of second gag lever post to the distance of first gag lever post, is greater than the first end of second gag lever post to the distance of stopper simultaneously to and when front mould and back mould were in the die sinking state, the lateral wall of first gag lever post breaks away from supporting of second gag lever post and leans on.

2. The ejection structure of an injection mold according to claim 1, characterized in that: the side wall of the rear die frame facing the front die frame is provided with a guide sliding groove for sliding fit of the sliding block, and the bottom wall of the guide sliding groove is provided with an inclined guide section.

3. The ejection structure of an injection mold according to claim 1, characterized in that: the inclined guide section is provided with a positioning groove for inserting the head of the inclined guide rod.

4. The ejection structure of an injection mold according to claim 1, characterized in that: the rear die frame comprises a push plate and a die core; the slider sliding fit is on the push pedal to the slider has the mounting hole towards having on the lateral wall of mould benevolence, be provided with in the mounting hole and lean on the buffer spring who leans on to mould benevolence lateral wall.

5. The ejection structure of an injection mold according to claim 1, characterized in that: and a pressing bolt is arranged on the front mould frame, and when the front mould and the rear mould are in a mould closing state, the end part of the pressing bolt is pressed against the sliding block.

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