CN213198655U

CN213198655U - Ejector pin structure of injection mold

Info

Publication number: CN213198655U
Application number: CN202021860676.5U
Authority: CN
Inventors: 古志安
Original assignee: Shenzhen Jinxiangsheng Technology Co ltd
Current assignee: Shenzhen Jinxiangsheng Technology Co ltd
Priority date: 2020-08-31
Filing date: 2020-08-31
Publication date: 2021-05-14
Anticipated expiration: 2030-08-31

Abstract

The utility model discloses an ejector pin structure of an injection mold, which comprises an upper ejector plate, a lower ejector plate and ejector pins, wherein the upper ejector plate and the lower ejector plate are connected by a support plate so as to form a holding cavity structure; the moving device further comprises a spring, a screw rod and a servo motor, one end of the spring is fixedly connected with the supporting plate, the lower end of the spring penetrates through the bearing piece to be connected with the servo motor, and the servo motor drives the bearing piece to move, so that the ejector pin extends outwards. The utility model discloses possess the advantage of the drawing of patterns of being convenient for, solved the finished product often be difficult to take out and inefficiency and easily cause the problem of damage to the product.

Description

Ejector pin structure of injection mold

Technical Field

The utility model relates to a mould field especially relates to an injection mold's thimble structure.

Background

The ejector pin is a mold accessory used for achieving the functions of ejection or stabilization and the like at present, and the ejector pin is widely applied to a mold, for example, the ejector pin is installed in an installation hole in the mold, when a molded product needs to be ejected, a rod body of the ejector pin of the mold extends out of the installation hole, the molded product or a flow channel is ejected out of the mold, and the molded product or the flow channel is separated from the mold.

The prior chinese patent with reference to publication No. CN104723515A discloses a thimble structure of a mold, which includes: the thimble rod body is cylindrical; the material pulling head is arranged at the front part of the thimble rod body and is provided with a hook-shaped notch; the boss is arranged at the front part of the ejector pin rod body, the diameter of the cross section of the boss is smaller than that of the cross section of the ejector pin rod body, and the boss is arranged at the extending position of the center of the ejector pin rod body.

The above prior art solutions have the following drawbacks: at the in-process of moulding plastics, whole hook type breach is filled to melting plastic, forms the shape of similar hook after the cooling solidification, at the die sinking in-process, ejecting back with injection moulding product at the thimble, to having certain viscidity and the less product of weight in self, the part of similar hook shape is difficult for breaking away from with hook type breach, causes injection moulding product to be difficult for breaking away from the thimble, in addition, what present thimble structure all adopted is quick resilience formula structure, but to some special cases: for example, when the thimble is not separated from the injection product, the injection product is re-inserted into the mold along with the rebound of the thimble.

SUMMERY OF THE UTILITY MODEL

To the weak point that exists in the above-mentioned technique, the utility model provides an injection mold's thimble structure possesses the advantage such as the drawing of patterns of being convenient for, has solved the problem that the product often is difficult to take out and inefficiency and easily causes the damage to the product among the above-mentioned problem.

In order to achieve the purpose, the utility model provides an ejector pin structure of an injection mold, which comprises an upper ejector plate, a lower ejector plate and ejector pins, wherein the upper ejector plate and the lower ejector plate are connected by a support plate so as to form an accommodating cavity structure; the moving device further comprises a spring, a screw rod and a servo motor, one end of the spring is fixedly connected with the supporting plate, the lower end of the spring penetrates through the bearing piece to be connected with the servo motor, and the servo motor drives the bearing piece to move, so that the ejector pin extends outwards.

Preferably, the upper end of the spring is fixedly connected with the supporting plate, and the lower end of the spring penetrates through the bearing piece to be fixedly connected with a moving block arranged on a moving shaft of the servo motor.

Preferably, the upper end and the lower end of the screw rod are respectively provided with a fixing block, the fixing blocks are fixedly connected with the supporting plate, and the screw rod penetrates through the bearing piece and then is connected with the fixing blocks.

Preferably, a limiting device is arranged beside the ejector pin and comprises a limiting frame and a stretching motor, the limiting frame is arranged on the outer side of the ejector pin in a surrounding mode, and the stretching motor is arranged at the lower end of the limiting frame.

Preferably, a sliding groove is formed in the limiting frame, a sliding block is arranged in the sliding groove, and one end of the sliding block is fixedly connected with the supporting plate.

Preferably, one end of the bearing piece extends into the limiting frame and is fixedly connected with the thimble.

Preferably, the upper end of the ejector pin is provided with a supporting surface, and the supporting surface is clamped into the upper ejector plate.

The utility model has the advantages that: compared with the prior art, the utility model provides an injection mold's thimble structure is provided with servo motor, makes the thimble stretch out the ejector plate and thus contact with the injection moulding product under servo motor's drive, carries out ejecting with the injection moulding product, and compresses the spring this moment, and along with the compression of spring, the thimble can reduce gradually the velocity of motion under the drive of acceptor, falls to 0 at last, and the spring resumes deformation at last, makes the thimble retract; the ejector pin is in an extending state, and at the moment, the injection product can be manually demoulded; after the treatment is finished, the limit of the limiting device on the bearing piece is removed, so that the thimble retracts.

Drawings

FIG. 1 is a view of the main structure of the present invention;

FIG. 2 is an internal structure view of the present invention;

fig. 3 is a partial structure diagram of the present invention.

The main element symbols are as follows:

1. lower ejector plate 2, upper ejector plate 3, thimble 4, servo motor 5, motion piece

6. Spring 7, lead screw 8, fixed block 9, adapting piece 10, spacing frame 11, spout

12. Slide bar 13, tensile motor 14, backup pad.

Detailed Description

In order to make the present invention clearer, the present invention will be further described with reference to the accompanying drawings.

Referring to fig. 1 to 3, the present invention provides an ejector pin structure of an injection mold, including an upper ejector plate 2, a lower ejector plate 1 and an ejector pin 3, wherein the upper ejector plate 2 and the lower ejector plate 1 are connected by a support plate 14 to form an accommodating cavity structure, the upper ejector plate 2 is provided with a support hole for the ejector pin 3 to penetrate out and contact with a product, and the lower end of the ejector pin 3 is connected with a receiving piece 9 of a movement device; the moving device further comprises a spring 6, a screw rod 7 and a servo motor 4, one end of the spring 6 is fixedly connected with the supporting plate 14, the lower end of the spring penetrates through the bearing piece 9 and is connected with the servo motor 4, and the servo motor 4 drives the bearing piece 9 to move, so that the ejector pin 3 extends outwards. In the embodiment, the supporting plate is matched with the upper ejection plate and the lower ejection plate to form an accommodating cavity, so that the internal structure is protected from being interfered by the external environment; in addition, the extension of the ejector pin is realized by utilizing the on-line movement of the servo motor, and the retraction of the ejector pin is realized by the resilience of the spring, so that the power consumption can be effectively reduced, and the production cost is reduced.

For this purpose, the upper end of the spring 6 is fixedly connected to the support plate 14, and the lower end of the spring 6 is fixedly connected to the moving block 5 provided on the moving shaft of the servomotor 4 through the receiving member 9. The upper and lower both ends of lead screw 7 all are equipped with fixed block 8, and fixed block 8 links to each other with backup pad 14 is fixed, and lead screw 7 passes and links to each other with fixed block 8 behind the accepting piece 9. In this embodiment, at first through setting up the lead screw, the both ends of lead screw all utilize the fixed block to fix, and pass and accept the piece, when carrying out the during operation like this, accept the piece and will move along the lead screw, and lead screw and thimble are located the both sides of spring, when moving the piece upward movement like this, will drive and accept the parallel upward movement of piece, thereby compress the spring, and utilize the spring structure, when the spring compression is to the certain degree, the reaction force that produces will be big more, will produce certain conflict effect to the motion of motion piece like this, and then reduce the rate of movement of motion piece, at last when servo motor stop motion, the spring resumes deformation, thereby make and accept one side of piece towards servo motor and move, and then make and retract the thimble.

In order to realize the scheme, a limiting device is arranged beside the thimble 3 and comprises a limiting frame 10 and a stretching motor 13, the limiting frame 10 is arranged at the outer side of the thimble 3 in a surrounding manner, and the stretching motor 13 is arranged at the lower end of the limiting frame 10; a sliding groove 11 is arranged on the limiting frame 10, a sliding block 12 is arranged in the sliding groove 11, and one end of the sliding block 12 is fixedly connected with a supporting plate 14; one end of the bearing piece 9 extends into the limiting frame 10 and is fixedly connected with the thimble 3; the upper end of the thimble 3 is provided with a supporting surface which is clamped into the upper ejector plate 2. In this embodiment, a position-limiting structure is provided to effectively limit the thimble to a certain extent, and more specifically, a sliding groove for the sliding block to move is provided on the position-limiting frame, and the sliding block is fixedly connected with the supporting plate, so that the position-limiting frame can move up and down to a certain extent, and the receiving piece extends into the position-limiting frame, so that the receiving piece can be effectively limited, in an actual use state, when the thimble extends out of the upper ejection plate under the action of the receiving piece to contact with an injection product, if the injection product adheres to the thimble, the position-limiting frame can be pushed up by using a wire-drawing motor, so as to reduce the distance between the receiving piece and the lower end of the position-limiting frame, so that when the thimble rebounds under the action of the spring, the receiving piece moves down to contact with the position-limiting frame to stop moving, and the thimble is still in an extending state, at this time, demolding treatment can, after demolding is finished, the limiting frame is reset, and the ejector pin retracts into the accommodating cavity; in addition, the upper portion of thimble is equipped with the holding surface to increase and injection moulding product's area of contact, thereby avoid pressure intensity too big to cause the damage to injection moulding product, last holding surface and last ejector plate coincide completely moreover just can effectively avoid the holding surface to cause the influence to injection mold's shaping.

The above disclosure is only for the specific embodiments of the present invention, but the present invention is not limited thereto, and any changes that can be made by those skilled in the art should fall within the protection scope of the present invention.

Claims

1. The ejector pin structure of the injection mold is characterized by comprising an upper ejector plate, a lower ejector plate and ejector pins, wherein the upper ejector plate and the lower ejector plate are connected through a supporting plate to form an accommodating cavity structure; the moving device further comprises a spring, a screw rod and a servo motor, one end of the spring is fixedly connected with the supporting plate, the lower end of the spring penetrates through the bearing piece to be connected with the servo motor, and the servo motor drives the bearing piece to move, so that the ejector pin extends outwards.

2. The ejector pin structure of an injection mold according to claim 1, wherein the upper end of the spring is fixedly connected with the support plate, and the lower end of the spring passes through the bearing and is fixedly connected with a moving block arranged on a moving shaft of the servo motor.

3. The ejector pin structure of an injection mold according to claim 1, wherein the screw rod is provided with fixing blocks at upper and lower ends thereof, the fixing blocks are fixedly connected with the supporting plate, and the screw rod is connected with the fixing blocks after passing through the receiving member.

4. The ejector pin structure of an injection mold according to claim 1, wherein a limiting device is arranged beside the ejector pin and comprises a limiting frame and a micro cylinder, the limiting frame is arranged around the outer side of the ejector pin, and the micro cylinder is arranged at the lower end of the limiting frame.

5. The ejector pin structure of an injection mold according to claim 4, wherein a sliding groove is formed on the limiting frame, a sliding block is arranged in the sliding groove, and one end of the sliding block is fixedly connected with the supporting plate.

6. The ejector pin structure of an injection mold according to claim 1, wherein one end of the receiving member extends into the limiting frame to be fixedly connected with the ejector pin.

7. The ejector pin structure of an injection mold according to claim 1, wherein a support surface is provided at an upper end of the ejector pin, and the support surface is clamped into the upper ejector plate.