CN201020838Y - Injection mold using a hollow type inclined ejector pin ejection mechanism - Google Patents

Abstract

The utility model provides an injection mold using a gap type inclined ejector pin ejecting mechanism, which comprises a movable mould, a movable mould cavity, a stationary mould, a stationary mould cavity, and an inclined ejector pin ejecting mechanism. A gap is arranged on the movable mould and the movable mould cavity, the inclined ejector pin ejecting mechanism comprises an inclined ejector pin and a guide block, the inclined ejector pin is threaded in the guide block, to ensure the inclined ejector pin keep the gap state with the gap position in the ejecting and resetting process of the inclined ejector pin. The injection mold using a gap type inclined ejector pin ejecting mechanism greatly decreases the processing difficulty and the requirement to the processing equipment, the waste of the material can be reduced at the same time, and the manufacture cycle is reduced.

Description

Injection mold using a hollow type inclined ejector pin ejection mechanism

【Technical field】

The utility model relates to an injection mold, in particular to an injection mold using an inclined thimble mechanism.

【Background technique】

Injection mold is a kind of mold widely used in industrial production at present. Its structure is shown in Figure 1, mainly including fixed mold 1, fixed mold core 2, moving mold 3, moving mold core 4, and ejection system 5. In order to produce some plastic products with relatively complex structures, the corresponding mold core structure will also be complicated. In this case, the ejection system often adopts an inclined ejector pin ejection mechanism. The inclined ejector pin ejector mechanism consists of inclined ejector pin 6, guide slider 7. It is composed of face needle plate 8 and bottom needle plate 9. During the ejection process of the plastic product, the distance that the slanted ejector pin 6 penetrates into the plastic part of the plastic product 10 is L11. When the ejector system moves for a distance of L22 in the direction opposite to the mold opening direction, the slanted ejector pin is perpendicular to the mold opening direction. Direction movement L33 distance, as long as L33 is greater than L11 when the ejection system moves L22 distance, that is, the distance that the inclined ejector pin moves along the vertical direction of the mold opening direction is greater than the distance that the inclined ejector pin penetrates into the glue position of the product, so that the product can be guaranteed smoothly. Unmold.

For some cases where the length of the slanted thimble is long or the angle of inclination is large, if the general slanted thimble structure is still used, it will bring difficulties to the mold processing, because the slanted thimble is assembled in the slanted ejector pin hole of the moving mold and the moving mold core. In addition, the surface of the slanted ejector pin except the forming part and the slanted ejector pin hole are all bonded. The slanted ejector hole cannot be milled out directly with a milling machine. Higher performance equipment will cause huge waste of materials and prolong the manufacturing cycle.

【Content of utility model】

The technical problem to be solved by the utility model is to provide an injection mold using a space-avoiding inclined ejector pin ejection mechanism, which ensures that when the inclined ejector pin is longer in size or has a larger inclination angle, the mold can be processed and assembled more easily, reducing The waste of materials shortens the manufacturing cycle.

The technical problem to be solved by the utility model is achieved through the following technical solutions:

An injection mold using a hollow-avoiding inclined ejector pin ejection mechanism, including a movable mold, a movable mold core, a fixed mold, a fixed mold core, and an inclined ejector pin ejection mechanism. The inclined ejector pin ejection mechanism includes an inclined ejector pin and a guide block, and the inclined ejector pin passes through the guide block, and keeps the inclined ejector pin in a state of avoiding the space during the process of ejection and reset. .

In the case of meeting the strength and structure requirements of the mold, the size of the escaping position ensures that the inclined ejector pin does not interfere with the escaping position during the process of ejection and reset.

It further includes a guide block guided by the slanted thimble, which is fixedly connected to the movable mold. The guide block is provided with a guide hole, and the slanted thimble is passed through the guide hole and can slide freely along the direction of the hole axis.

Beneficial effects of the utility model: by replacing the structure of the existing slanted needle hole with the space-avoiding position milled on the movable mold and the movable mold core, the wire cutting of the movable mold is avoided, the wire cutting of the movable mold core is reduced, and the Difficulty in processing, while reducing material waste and shortening the manufacturing cycle.

The features and advantages of the utility model will be described in detail through embodiments in conjunction with the accompanying drawings.

【Description of drawings】

Fig. 1 is the sectional view of the injection mold of prior art using inclined ejector pin ejection system;

Fig. 2 is the cross-sectional view of the utility model when the injection molding using the air-avoiding inclined ejector pin ejection system is completed and the mold is not opened;

Fig. 3 is the structural representation of the air-avoiding inclined ejector pin and the guide block used in the utility model;

Fig. 4 is a cross-sectional view of the injection mold using the air-avoiding inclined ejector pin ejection system of the utility model when the movable and fixed molds are completely separated, and the product has not yet started to be ejected;

Fig. 5 is a cross-sectional view of the utility model when the plastic product is completely ejected by the injection mold of the air-avoiding inclined ejector pin ejection system;

【Detailed ways】

Please refer to Fig. 2, the utility model includes a movable mold 10, a movable mold core 11, a fixed mold 12, a fixed mold core 13, and an inclined ejector pin 14, a guide slider 15, a face needle plate 16 and a bottom needle plate 17. Thimble system. Wherein, the movable mold 12 and the movable mold core 13 are respectively provided with space-avoiding positions 18, 19, so that the inclined thimble pin 14 passes through the space-avoiding positions 18, 19, and can contact the moving mold 12, the moving mold in the process of ejection and reset. Jen 13 avoids the short. Because the size of the vacancy in the utility model is larger than the size of the oblique pinhole when the vacancy is not avoided in the prior art, and the vacancy in the utility model is straight, it can be directly milled out with a milling machine, thereby avoiding wire cutting, greatly Reduced production difficulty and requirements for production equipment.

Please also refer to FIG. 3 , the utility model does not have the guiding function of the pinhole of the slanted ejector, and needs to realize the guiding function through the sealing position at the top of the slanted ejector pin 14 and the guide block 20 at the lower part. The size of the sealing position is generally about 3 times the cross-sectional size of the end of the slanted thimble; In the guide hole and can slide freely along the direction of the hole axis, so as to realize the guidance of the inclined thimble. The bottom of the slanting thimble is provided with a draw-in slot 22, and is clamped on the slanting top seat through the slanting slot. The bottom of the slanting thimble is provided with a hanging platform and the slanting top seat is used in conjunction, and the slanting top seat is fixed on the bottom needle plate by screws.

Please refer to Figure 4 and Figure 5. Figure 4 is the state diagram of the new fixed mold and movable mold completely separated, and the product has not yet been ejected. Figure 5 is the state diagram of the product when it is completely ejected. plate, drives the inclined ejector pin to eject the product; when the mold is closed, the reset lever (not shown in the schematic diagram) pushes the ejector plate, drives the inclined ejector pin to reset, and completes the mold opening and closing action. During the entire process of ejection and reset, the inclined ejector pin The space-avoiding position of moving mold, moving mold kernel is in the state of avoiding the air with moving mold and moving mold kernel all the time.

Claims (3)

1. An injection mold using an air-avoiding inclined ejector pin ejection mechanism, comprising a movable mold, a movable mold core, a fixed mold, a fixed mold core and an inclined ejector pin ejection mechanism, characterized in that: the movable mold and the movable mold core are There is a evacuation position, and the ejector mechanism of the slanted ejector includes a slanted thimble and a guide block. The slanted thimble passes through the guide block, and keeps the slanted thimble away from the evacuation position during the process of ejection and reset. state. 2. The injection mold using the evacuation-type slanted ejector pin ejection mechanism as claimed in claim 1, characterized in that: in the case of meeting the mold strength and structural requirements, the size of the evacuation ensures that the slanted ejector pin is ejected and reset. Always do not interfere with the avoidance position. 3. The injection mold using the hollow-avoiding inclined ejector pin ejection mechanism as claimed in claim 1 or 2, wherein it further comprises a pair of guide blocks guided by the inclined ejector pins, and the guide blocks are fixedly connected on the movable mold, The guide block is provided with a guide hole, and the slanted thimble is passed through the guide hole and can slide freely along the direction of the hole axis.

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