CN201023288Y - Ejector - Google Patents

Abstract

An ejection mechanism, the ejected product is separated from the male and female mold cores, wherein the ejection mechanism includes a set of top plates arranged in the top plate groove formed by the depression of the female mold core, and the top plate includes at least one limit step hole, It is used to pass through the screw, and the ejection spring sleeved on the screw is compressed and accommodated in the spring hole formed by the extension and depression of the top plate groove; and a return pin is movably accommodated in the return pin hole of the male mold core , one end of which bears against the above-mentioned top plate, and the other end negotiates the return spring, and the return spring is accommodated in the spring groove formed in the bottom of the return pin hole. A simple spring is used to replace the complicated thimble ejector block mechanism, which simplifies the mold structure and reduces the mold cost.

Description

Ejector

【Technical field】

The utility model relates to an ejection mechanism, in particular to an ejection mechanism for ejecting a thermoplastic product from a male and female die core of a mould.

【Background technique】

In the process of mold design, some special plastic molding products (such as: transparent parts) are often encountered, which have particularly high requirements on appearance, and there must be no traces of thimbles, and there must be no traces of post-processing. The conventional design solution is to use jacking blocks The top plate is ejected, which makes the mold structure very complicated: it includes at least the upper and lower ejector plates, foot pads, and lower fixing plate, so the design time and processing time of the mold are increased, and the mold quality and trial time are affected. Make the mold cost increase.

In view of the above, it is necessary to develop an ejection mechanism with a simple structure to eject the plastic product from the male and female mold cores.

【Content of invention】

Therefore, the purpose of this utility model is to provide an ejection mechanism, which ejects the plastic product out of the male and female mold cores, so as to solve the problem of complex structure caused by the use of the top block and top plate in the mold in the prior art.

In order to achieve the above purpose, the utility model provides an ejection mechanism, the ejected product is separated from the male and female mold cores, wherein the ejection mechanism includes a set of top plates arranged in the top plate groove formed by the depression of the female mold core. The top plate includes at least one step-limiting hole for passing a screw, and the ejection spring sleeved on the screw is compressed and accommodated in the spring hole extending from the top plate groove; and a return pin is movably accommodated in the top plate groove. In the return pin hole of the male mold core, one end of it is pushed against the above-mentioned top plate, and the other end negotiates the return spring, and the return spring is accommodated in the spring groove formed in the bottom of the return pin hole.

Compared with the prior art, the ejection mechanism of the utility model uses a simple spring to replace the complex thimble ejector block mechanism, that is, the spring force replaces the ejection force of the forming machine, and the upper and lower ejector plates in the prior art are omitted. The ejection mechanism (including upper and lower ejector plates, foot pads, and lower fixing plate) simplifies the mold structure, reduces mold design time and processing man-hours, shortens mold opening cycle, and reduces mold cost.

In order to have a further understanding of the purpose, structural features and functions of the utility model, hereby cooperate with the drawings to describe in detail as follows:

【Description of drawings】

Fig. 1 is a state diagram of the ejector mechanism of the present invention in the mold clamping state.

Fig. 2 is a schematic diagram of the ejection mechanism of the present invention when it is separated from the mold core and the template.

Fig. 3 is a state view of the utility model when the mold is not fully opened.

Fig. 4 is the state view of the utility model in fully opening the mold.

【Detailed ways】

Referring to Figure 1 and Figure 2 together, the ejector mechanism is set between the male and female mold cores 7 and 2, wherein the female mold core 2 includes at least one guide post 23 for guiding the movement of the ejector mechanism direction, and the female mold core 2 is recessed inwardly from the parting surface to form a top plate groove 21, which accommodates the top plate 3 of the ejection mechanism. 22 concentrically extends and dents a screw hole 11, which is locked with the screw 4 that is sheathed with the ejection spring 40; and the male mold core 7 is coaxially concentric with the screw hole 11 and the spring hole 22 and is formed by a parting surface. The return pin hole 71 is movable to accommodate the return pin 5, and the end of the return pin hole 71 away from the parting surface extends and sags a spring groove 81 for accommodating the return spring 50 that ejects the return pin 5. In an example, the spring groove 81 extends from the male core 7 to the male template 8 .

The ejector mechanism includes a top plate 3 for ejecting the product 6, placed in the above-mentioned top plate groove 21, which includes at least one limit step hole 32, through which a screw 4 is inserted and locked with the above-mentioned screw hole 11, and the screw 4 An ejection spring 40 is sleeved on the top, and the ejection spring 40 is compressed and accommodated in the spring hole 22 of the female mold core 2 to limit the ejection stroke of the top plate 3; in addition, the top plate 3 also corresponds to the above-mentioned female mold core The guide post 23 of 2 is provided with at least one guide sleeve hole 31 for the guide post 23 to pass through, so as to guide and position the moving direction of the top plate 3 during mold closing or mold opening. Furthermore, the ejector mechanism also includes a return pin 5, which is movably accommodated in the return pin hole 71 of the above-mentioned male mold core 7, and one end of the return pin 5 is pushed against the limit step hole 32 top plate 3 on the periphery, and the other end negotiates the return spring 50 arranged in the above-mentioned spring groove 81, which is used to delay the ejection time of the top plate 3 and prevent the product 6 from sticking to the male mold core 7 when the mold is opened and is difficult to take out. The elastic force of the return spring 50 is greater than the elastic force of the above-mentioned ejecting spring 40 .

When opening the mold, referring to Fig. 3, the return spring 50 first relaxes, the return pin 5 passes through the return pin hole 71 and continues to support the screw 4 and the top plate 3 on the periphery of the screw 4, and the product 6 is separated from the male mold core 7 at the same time. When the mold is fully opened (refer to Figure 4), the return pin 5 is separated from the top plate 3, the ejection spring 40 relaxes, and the top plate 3 moves down along the direction of the guide 23. At this time, the product 6 is separated from the female mold core 2 until the screw 4 Negotiate with the limit step hole 32.

When closing the mold, the return pin 5 bears against the top plate 3, and the ejection spring 40 is compressed until the top plate 3 is fully accommodated in the top plate groove 21. At this time, the screw 4 is flush with the top plate 3, and the mold is continued to be closed, and the return pin 5 Under pressure, gradually return to the return pin hole 71, and the return spring 50 is compressed until the return pin 5 is flush with the male die core 7.

In summary, the ejector mechanism of the utility model uses a simple spring to replace the complex thimble ejector mechanism, which saves the upper and lower ejector mechanisms in the prior art, simplifies the mold structure, and reduces the design time and processing of the mold. Shorten the working hours, shorten the mold opening cycle, and reduce the mold cost.

Claims (4)

1. ejecting mechanism, the pushing tow product breaks away from the male and female die, wherein, this mother module core caves in into a top board groove, this top board groove extends and caves in at least one spring eye, and the screw coaxial with this spring eye that cave in extended in this spring eye bottom, and this male model benevolence caves in into a return pin-and-hole with the coaxial heart of this screw, and this return pin-and-hole bottom notch one spring groove, this is characterized in that: comprise

One top board is mounted in the above-mentioned top board groove, and it comprises at least one limited step hole, wears the screw of a sheathed ejector spring and sealed with above-mentioned screw, and this ejector spring compression is located in the above-mentioned spring eye;

One return pin, activity are contained in the above-mentioned return pin-and-hole, and an end peaks at above-mentioned top board, and other end negotiation is contained in the return spring in the above-mentioned spring groove.

2. ejecting mechanism as claimed in claim 1 is characterized in that: this mother module core also comprises at least one guide pillar, and this top board be to offering at least one dowel hole by guide pillar, and activity is installed with these guide pillars.

3. ejecting mechanism as claimed in claim 1 is characterized in that: this screw is recessed to form along this spring eye extension by caster.

4. ejecting mechanism as claimed in claim 1 is characterized in that: this spring groove extends to the male model plate by male model benevolence.

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