Structure for preventing product from adhering to front mold and rear mold

Abstract

The utility model relates to the technical field of mold demolding, in particular to a structure for preventing a product from sticking to a front mold and a rear mold, which comprises a mounting plate, two square iron blocks are arranged at the top of the mounting plate, a lifting bottom plate is arranged between the two square iron blocks, and an ejector pin mounting plate is arranged at the top of the lifting bottom plate. A plurality of long ejector pin sets are inserted into the ejector pin mounting plate, and a lower die plate is arranged at the top of the square iron block. According to the structure for preventing the product from being adhered to the front mold and the rear mold, the product is fixed by uniformly arranging the back-off insert pins of the back-off structure at the top end on the periphery of the product, meanwhile, the round ejector pins which are downwards ejected are arranged on the edges of the back-off insert pins, and the D-shaped ejector pins which are arranged by adopting the inclined ejection channels with the inclination of 0.3 degree are arranged on the periphery of the deep bone insert in a matched manner, so that the D-shaped ejector pins can expand outwards to be separated from the bone position; when the product is ejected out of the rear mold core, the product can be completely ejected out without sticking to the rear mold core and the ejector pin, so that the yield is ensured, and the purpose of reducing the cost is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of mold demoulding, in particular to a structure for preventing products from sticking to front and rear molds. Background Art

[0002] Injection molds are a common tool for producing plastic products. They are also tools that give plastic products complete structures and precise dimensions. Injection molding is a processing method used in the mass production of certain parts with complex shapes. Specifically, it refers to the high-pressure injection of heated and molten plastic into the mold cavity by an injection molding machine. After cooling and solidification, the molded product is obtained. After the injection mold is successfully injected, the molded product needs to be demolded.

[0003] At present, small injection molded products are prone to sticking to the front and rear molds during demolding, causing product tearing, affecting product yield, and increasing manufacturing costs. Therefore, a structure is needed to prevent the product from sticking to the front and rear molds to help demold the product. Utility Model Content

[0004] In view of the deficiencies in the prior art, the present invention provides a structure for preventing products from sticking to the front and rear molds, thereby solving the problems raised in the above-mentioned background technology.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions: a structure for preventing products from sticking to the front and rear molds, comprising a mounting plate, two square iron blocks are arranged on the top of the mounting plate, a lifting bottom plate is arranged between the two square iron blocks, a thimble mounting plate is arranged on the top of the lifting bottom plate, a plurality of long thimble groups are plugged into the interior of the thimble mounting plate, a lower template is arranged on the top of the square iron block, a rear mold core is arranged on the surface of the lower template, a plurality of deep bone inserts and inverted inserts are arranged inside the rear mold core, an upper template is arranged on the top of the lower template, and a front mold core is arranged at the bottom of the upper template.

[0006] Optionally, the long ejector pin group includes round ejector pins and D-shaped ejector pins, and the round ejector pins and D-shaped ejector pins are sequentially inserted into the ejector mounting plate, the lower mold plate and the rear mold core.

[0007] Optionally, an inclined top channel for the D-shaped ejector pin to pass through is provided inside the rear mold core, and the inclination of the inclined top channel is 0.3°.

[0008] Optionally, an injection molding groove is provided on the surface of the rear mold core, and the dome pins and undercut inserts are distributed in the injection molding groove in the form of a ring array.

[0009] Optionally, there are several D-shaped ejectors, and the several D-shaped ejectors are distributed with the deep bone insert as the center.

[0010] Optionally, a through hole is provided on the surface of the mounting plate, a positioning block is provided on the top of the rear mold core, and a positioning groove is provided on the surface of the front mold core corresponding to the position of the positioning block.

[0011] The utility model provides a structure for preventing products from sticking to the front and rear molds, which has the following beneficial effects:

[0012] The structure for preventing products from sticking to the front and rear molds fixes the product by evenly arranging the inverted pins with the top inverted structure around the product to prevent it from sticking to the front mold core during demolding. At the same time, a round ejector pin is set at the edge of the inverted pin, and D-shaped ejector pins with an inclined top channel arrangement with an inclination of 0.3° are set around the deep bone insert. The D-shaped ejector pins can expand outward and break away from the bone position, ensuring that when the product is ejected from the rear mold core, it will not stick to the rear mold core and the ejector pins, and can also be ejected completely and accurately, thereby ensuring the yield and achieving the purpose of reducing costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the structure of the utility model;

[0014] Figure 2 This is a schematic diagram of the rear mold core structure of the utility model;

[0015] Figure 3 This is a schematic diagram of the layout of the inverted inlay pin and long ejector pin assembly of the utility model;

[0016] Figure 4 This is a schematic structural diagram of the inverted inlay pin and long ejector pin assembly of the utility model;

[0017] Figure 5 This is a schematic diagram of the cross-sectional structure of the utility model.

[0018] In the figure: 1. Mounting plate; 2. Square iron block; 3. Lifting bottom plate; 4. Ejector mounting plate; 5. Lower template; 6. Rear mold core; 7. Deep bone insert; 8. Inverted insert; 9. Long ejector assembly; 901, round ejector pin; 902, D-type ejector pin; 10. Upper template; 11. Front mold core; 12. Injection groove; 13. Slanted ejector channel. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0020] See also Figures 1 to 5The utility model provides a technical solution: a structure for preventing products from sticking to the front and rear molds, comprising a mounting plate 1, a through hole being opened on the surface of the mounting plate 1, two square iron blocks 2 being arranged on the top of the mounting plate 1, a lifting bottom plate 3 being arranged between the two square iron blocks 2, and a top of the lifting bottom plate 3 being arranged with an ejector pin mounting plate 4. In order to achieve the goal of not sticking the front mold core 11, the rear mold core 6 and the ejector when demoulding the product, the product can be ejected completely and accurately, thereby ensuring the yield rate and achieving the purpose of reducing costs. A plurality of long ejector pin groups 9 are plugged into the interior of the ejector pin mounting plate 4, and the long ejector pin group 9 includes a round ejector pin 901 and a D-shaped ejector pin 902. The round ejector pin 901 and the D-shaped ejector pin 902 are sequentially inserted into the ejector pin mounting plate 4, the lower mold plate 5 and the ejector pin. The rear mold core 6 is provided with an inclined ejection channel 13 for the D-type ejector 902 to pass through inside the rear mold core 6. The inclination of the inclined ejection channel 13 is 0.3°. When ejecting, the D-type ejector 902 is stretched outward to separate from the bone position to ensure that when the product is ejected from the rear mold core 6, there are several D-type ejectors 902. The plurality of D-type ejectors 902 are distributed around the deep bone insert 7. When in use, a lifting drive device is installed at the bottom of the lifting base plate 3, so that it is connected to the lifting base plate 3 through the through hole. When demolding, the lifting base plate 3 is driven to rise with the ejector mounting plate 4 by the lifting drive device. While rising, the D-type ejector 902 is stretched out of the bone position to peel off the product. At the same time, the round ejector pin 901 completely ejects the product.

[0021] A lower template 5 is provided on the top of the square iron block 2, and a rear mold core 6 is provided on the surface of the lower template 5. A plurality of deep bone inserts 7 and inverted buckle pins 8 are provided inside the rear mold core 6. The inverted buckle pins 8 of the top inverted structure are evenly arranged around the product to fix the product to prevent it from sticking to the front mold core 11 during demolding. An injection groove 12 is provided on the surface of the rear mold core 6, and the dome pins 901 and inverted buckle pins 8 are distributed in the injection groove 12 in the form of a ring array. An upper template 10 is provided on the top of the lower template 5, and a front mold core 11 is provided on the bottom of the upper template 10. A positioning block is provided on the top of the rear mold core 6, and a positioning groove is provided on the surface of the front mold core 11 corresponding to the position of the positioning block.

[0022] In the present invention, the working steps of the device are as follows:

[0023] Install the lower template 5 on the injection molding machine through the mounting plate 1, and install the lifting drive device on the bottom of the lifting base plate 3 so that it is connected to the lifting base plate 3 through the through hole;

[0024] When the injection molding is completed and the mold is released, the upper mold plate 10 rises first, and the undercut pins 8 of the undercut structure will generate tension to fix the product on the rear mold core 6 to prevent the demoulding from sticking to the front mold core 11;

[0025] The lifting base plate 3 is then driven to rise with the ejector mounting plate 4 by the lifting drive device, and the dome ejector pin 901 and the D-shaped ejector pin 902 rise at the same time. When the D-shaped ejector pin 902 rises along the inclined ejection channel 13, it will expand outward to separate the product from the bone position, while the dome ejector pin 901 will move vertically upward to completely eject the product.

[0026] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the present invention can make equivalent replacements or changes based on the technical solution and utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A structure for preventing products from sticking to front and rear molds, comprising a mounting plate (1), characterized in that: Two square iron blocks (2) are arranged on the top of the mounting plate (1), a lifting base plate (3) is arranged between the two square iron blocks (2), a thimble mounting plate (4) is arranged on the top of the lifting base plate (3), a plurality of long thimble groups (9) are inserted into the interior of the thimble mounting plate (4), a lower template (5) is arranged on the top of the square iron block (2), a rear mold core (6) is arranged on the surface of the lower template (5), a plurality of deep bone inserts (7) and undercut inserts (8) are arranged inside the rear mold core (6), an upper template (10) is arranged on the top of the lower template (5), and a front mold core (11) is arranged at the bottom of the upper template (10).

2. The structure for preventing products from sticking to the front and rear molds according to claim 1, characterized in that: The long ejector pin group (9) comprises a round ejector pin (901) and a D-shaped ejector pin (902), and the round ejector pin (901) and the D-shaped ejector pin (902) are sequentially passed through the ejector pin mounting plate (4), the lower mold plate (5) and the rear mold core (6).

3. The structure for preventing products from sticking to the front and rear molds according to claim 2, characterized in that: The rear mold core (6) is provided with an inclined top channel (13) for the D-shaped ejector pin (902) to pass through, and the inclination of the inclined top channel (13) is 0.3°.

4. The structure for preventing products from sticking to the front and rear molds according to claim 2, characterized in that: An injection molding groove (12) is provided on the surface of the rear mold core (6), and the dome pins (901) and the undercut insert pins (8) are distributed in the injection molding groove (12) in the form of a ring array.

5. The structure for preventing products from sticking to the front and rear molds according to claim 2, characterized in that: The number of the D-shaped ejector pins (902) is several, and the several D-shaped ejector pins (902) are distributed with the deep bone insert (7) as the center.

6. The structure for preventing products from sticking to the front and rear molds according to claim 1, characterized in that: A through hole is provided on the surface of the mounting plate (1), a positioning block is provided on the top of the rear mold core (6), and a positioning groove is provided on the surface of the front mold core (11) corresponding to the position of the positioning block.

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