Reversed buckle withdrawing mechanism

Abstract

The invention provides a back-off withdrawing mechanism. The back-off withdrawing mechanism comprises a female die core; the male mold core comprises a first mold core and a second mold core, the first mold core is provided with a first inverted buckle forming part used for forming a first inverted buckle of a product, the second mold core is arranged on one side of the first mold core, a containing space is defined by the second mold core and the first mold core, and a sliding block is arranged in the containing space; the sliding block is provided with a second inverted buckle forming part used for forming a second inverted buckle of the product, and a sliding way is arranged in the sliding block; one end of the shifting block can be inserted into the sliding way and used for shifting the sliding block to move, the other end of the shifting block is connected with a driving device, a sliding groove is further formed in the shifting block, and a limiting pin is arranged in the sliding groove in a penetrating mode; and the two ends of the limiting pin are fixed to the second mold core, and the limiting pin is used for limiting the movement stroke of the shifting block. The first inverted buckle and the second inverted buckle of the product can be formed, interference of the second inverted buckle when the product is taken out from the direction of exiting from the first inverted buckle is avoided, the structure is simple, and machining and maintenance are easy.

Description

Technical field

[0001] The present invention relates to the technical field of mold mechanisms, in particular to an undercut ejection mechanism. Background technology

[0002] Due to their appearance or functional requirements, products usually have many undercuts. Figures 1-3 A product 1 is shown, which is formed by hot pressing in a hot pressing mold. The product 1 has a first undercut 10 and a second undercut 11. After the product 1 is formed in the mold, Figure 1 The first undercut 10 is removed in the direction indicated by the arrow A, but since the second undercut 11 is in the direction of the product 1 being removed, it will interfere with the removal of the product 1, making it impossible to remove the product 1.

[0003] In view of this, the present invention provides a reverse buckle withdrawal mechanism to solve the above problem. [Summary of the invention]

[0004] The technical problem to be solved by the present invention is that the hot press formed product has other undercuts in the undercut withdrawal direction, which makes the product unable to be taken out. In this regard, the present invention provides an undercut withdrawal mechanism to solve the above problem.

[0005] The solution of the present invention to solve the technical problem is: an undercut exit mechanism, applied to a hot pressing forming mold, the mold includes a female mold plate and a male mold plate, the undercut exit mechanism includes:

[0006] Mother mold core, the mother mold core is correspondingly arranged on the mother mold plate;

[0007] Male mold core, the male mold core is correspondingly arranged on the male mold plate, the male mold core and the female mold core jointly mold the product, the male mold core comprises a first mold core and a second mold core, wherein the first mold core has a first undercut molding part for molding the first undercut of the product, the second mold core is located on one side of the first mold core, and forms a receiving space with the first mold core, wherein a slider is provided in the receiving space;

[0008] A slider having a second undercut forming portion for forming a second undercut of a product, a slideway is provided in the slider, the slideway has an inclined surface, and the slider can be moved by a shifting block to slide in the accommodation space;

[0009] A shift block, one end of which can be sequentially passed through the second mold core and the slider slideway and then accommodated in the first mold core. It has an inclined surface corresponding to the inclined surface of the slideway and is used to shift the slider to move. The other end of the shift block is connected to a driving device, which is arranged on the male mold plate. The shift block is also provided with a slide groove, and a limit pin is passed through the slide groove;

[0010] ​​A limit pin, both ends of the limit pin are fixed to the second mold core, and the limit pin is engaged with the sliding groove to limit the movement stroke of the shifting block.

[0011] Preferably, the sliding track further has two straight surfaces. When the mold is closed, the straight surfaces are in contact with the shifting block to support the sliding block and resist the molding pressure of the mold.

[0012] Preferably, when the limit pin abuts against one end of the sliding groove of the shifting block away from the first mold core, one end of the shifting block is tightly received in the first mold core. When the limit pin abuts against one end of the sliding groove of the shifting block close to the first mold core, the sliding block completely exits from the second undercut of the product.

[0013] Preferably, the driving device can be a cylinder or an oil cylinder.

[0014] Preferably, both ends of the limit pin are fixed to the second mold core through fixing parts, and the fixing parts are C-shaped snap rings to ensure the stability of the limit pin.

[0015] The beneficial effect of the present invention is that through an undercut withdrawal mechanism of the present invention, not only can the first undercut and the second undercut of the product be molded, but also the interference of the second undercut when the product is taken out in the direction of withdrawing from the first undercut is avoided. Moreover, the structure of the present invention is simple and easy to process and maintain.

Description of the Drawings

[0016] Figure 1 is a schematic structural view of a conventional product.

[0017] Figure 2 is a schematic structural view of another angle of a conventional product.

[0018] Figure 3 is Figure 2 the schematic view of the B-B section in

[0019] Figure 4 is a schematic structural view of an undercut withdrawal mechanism of the present invention at an angle in the mold-closed state.

[0020] Figure 5 is a schematic structural view of an undercut withdrawal mechanism of the present invention at another angle in the mold-closed state.

[0021] Figure 6 is Figure 5 the schematic view of the C-C section in

[0022] Figure 7 is a schematic structural view of an undercut withdrawal mechanism of the present invention at an angle in the mold-open state.

[0023] Figure 8 is Figure 7 the schematic view of the D-D section in [Specific implementation method]

[0024] To further illustrate the technical means and effects of the present invention, the following is a detailed description in conjunction with the embodiments of the present invention and its accompanying drawings.

[0025] The present invention provides an undercut exit mechanism, which is applied to a hot pressing forming mold. The mold includes a female mold plate and a male mold plate (not shown). The undercut exit mechanism includes:

[0026] A mother mold core (not shown), the mother mold core is correspondingly arranged on the mother mold plate;

[0027] Male mold core, the male mold core is correspondingly arranged on the male mold plate, the male mold core and the female mold core jointly form the product 1, wherein the male mold core includes a first mold core 2 and a second mold core 3, the first mold core 2 has a first undercut forming portion 20, which is used to form a first undercut 10 of the product, the second mold core 3 is located on one side of the first mold core 2, and encloses a receiving space with the first mold core 2, and a slider 4 is provided in the receiving space;

[0028] Slider 4, the slider 4 has a second undercut forming portion 40, which is used to form the second undercut 11 of the product, the slider 4 is provided with a slideway 41, the slideway 41 has an inclined surface, and the slider 4 can be moved by the shifting block 5 to slide in the accommodation space;

[0029] A shift block 5, one end of which can be sequentially penetrated through the second mold core 3 and the slider slideway 41 and then accommodated in the first mold core 2, and has an inclined surface corresponding to the inclined surface of the slideway 41, and is used to shift the slider 4 to move. The other end of the shift block 5 is connected to a driving device (not shown), and the driving device is arranged on the male mold plate. The shift block 5 is also provided with a slide groove 50, and a limit pin 6 is penetrated in the slide groove 50;

[0030] Limiting pin 6, both ends of which are fixed to the second mold core 3, and the limiting pin 6 cooperates with the slide groove 50 to limit the movement stroke of the shifting block 5.

[0031] Wherein, the slideway 41 also has two straight surfaces. When the mold is closed, the straight surfaces fit with the shift block 5 to support the slider 4 and resist the mold molding pressure.

[0032] Wherein, when the shift block 5 moves to the point where the limit pin 6 abuts against the end of the shift block slot 50 away from the first mold core 2, one end of the shift block 5 is tightly accommodated in the first mold core 2, and when the shift block 5 moves to the point where the limit pin 6 abuts against the end of the shift block slot 50 close to the first mold core 2, the slider 4 completely withdraws from the second undercut 11 of the product.

[0033] Wherein, the driving device can be a pneumatic cylinder or a hydraulic cylinder.​

[0034] Wherein, both ends of the limit pin 6 are fixed to the second mold core 3 through a fixing member 60, and the fixing member 60 is a C-shaped buckle ring to ensure the stability of the limit pin 6.

[0035] The working process of the present invention is: when the mold is closed and hot-pressed, the limit pin 6 abuts against the end of the shift block slide 50 away from the first mold core 2, and one end of the shift block 5 is tightly accommodated in the first mold core 2, and the product 1 is formed between the male mold core and the female mold core, and the first undercut forming part 20 of the first mold core 2 and the second undercut forming part 40 of the slide block 4 respectively form the first undercut 10 and the second undercut 11 of the product;

[0036] When the mold is opened to take out the product 1, the driving device drives the shift block 5 to move in the direction of withdrawing from the first mold core 2, and the slider 4 gradually withdraws from the second undercut 11 of the product under the movement of the shift block 5, until the limit pin 6 abuts against the shift block slide 50 close to one end of the first mold core 2, and the slider 4 completely withdraws from the second undercut 11, and then the product 1 is taken out from the direction of withdrawing from the first undercut 10.

[0037] The beneficial effect of the present invention is that the undercut exit mechanism of the present invention can not only form the first undercut 10 and the second undercut 11 of the product, but also avoid the interference of the second undercut 11 when the product 1 is taken out from the direction of exiting the first undercut 10, and the present invention has a simple structure and is easy to process and maintain.

[0038] It should be pointed out that the present invention is not limited to the above-mentioned implementation modes, and any simple modification, equivalent changes and modifications made to the above-mentioned embodiments based on the technical solution of the present invention by any technician familiar with the profession shall fall within the protection scope of the present invention.

Claims

1. An undercut exit mechanism, applied to a hot pressing forming mold, the mold comprising a female mold plate and a male mold plate, characterized in that: The reverse deduction withdrawal mechanism includes: A mother mold core, the mother mold core is correspondingly arranged on the mother mold plate; A male mold core, the male mold core is correspondingly arranged on the male mold plate, the male mold core and the female mold core jointly mold the product, the male mold core comprises a first mold core and a second mold core, wherein the first mold core has a first undercut molding portion for molding a first undercut of the product, the second mold core is located at one side of the first mold core, and forms a receiving space with the first mold core, wherein a slider is provided in the receiving space; A slider, wherein the slider has a second undercut forming portion for forming a second undercut of the product, a slideway is provided in the slider, the slideway has an inclined surface, and the slider can be moved by a shifting block to slide in the accommodation space; A shift block, one end of which can be sequentially passed through the second mold core and the slider slideway and then accommodated in the first mold core, and has an inclined surface corresponding to the inclined surface of the slideway, and is used to shift the slider to move. The other end of the shift block is connected to a driving device, and the driving device is arranged on the male mold plate. The shift block is also provided with a slide groove, and a limit pin is passed through the slide groove; A limit pin, both ends of which are fixed to the second mold core, and the limit pin cooperates with the slide groove to limit the movement stroke of the shift block.

2. The undercut withdrawal mechanism according to claim 1, characterized in that: The slideway also has two straight surfaces. When the mold is closed, the straight surfaces are in contact with the shift block to support the slide block and resist the molding pressure of the mold.

3. The undercut withdrawal mechanism according to claim 1, characterized in that: When the limit pin abuts against the end of the shift block slide groove away from the first mold core, one end of the shift block is tightly accommodated in the first mold core, and when the limit pin abuts against the end of the shift block slide groove close to the first mold core, the slider completely withdraws from the second undercut of the product.

4. The undercut withdrawal mechanism according to claim 1, characterized in that: The driving device can be a pneumatic cylinder or a hydraulic cylinder.

5. The undercut withdrawal mechanism according to claim 1, characterized in that: Both ends of the limit pin are fixed to the second mold core through fixing parts, and the fixing parts are C-shaped buckles to ensure the stability of the limit pin.

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