A pop-up mold for a zip-top cap

Abstract

The utility model provides a kind of pop-up mould of easy pull cap, solve the problem that the groove of adjacent bubble is prone to deformation after foaming due to poor ductility of secondary cold rolling iron. It further comprises an upper die positioning ring, which is arranged on the outer side of the upper die body. A spring top plate is arranged above the lower die body. A through hole is arranged on the spring top plate for cooperation with the lower pull bubble mold. An annular groove is arranged on the top surface of the spring top plate for cooperation with the positioning ring. An elastic return element is arranged between the spring top plate and the lower die body. When the can lid undergoes the foaming process, the positioning ring cooperates with the annular groove to limit the groove of the can lid, and then the positioning ring and the spring top plate descend. The lower pull bubble mold extends out of the through hole to cooperate with the upper pull bubble mold, realizing the foaming of the can lid. Since the positioning ring and the annular groove clamp and limit the groove, the deformation of the groove can be prevented, thereby ensuring the quality of the product.

Description

Technical Field

[0001] This utility model relates to the field of can lid mold technology, specifically to an easy-open lid foaming mold. Background Technology

[0002] In the metal can manufacturing industry, tinplate (plated iron) is a commonly used material. With the development of science and technology, recycled cold-rolled iron is thinner than tinplate, and has better strength, higher hardness, and lower cost, giving it a significant advantage in the metal can manufacturing field. The bubbling process of easy-open lids involves creating a locally raised bulge structure at a designated location (usually the rivet installation point) to provide a base for the subsequent riveting of the pull ring. Due to the poor ductility of recycled cold-rolled iron, the diameters of the upper and lower bubbling dies used for bubbling must be increased. However, increasing the diameter of the upper and lower bubbling dies makes the grooves at adjacent bubbling points on the lid prone to deformation, resulting in substandard lid quality. Utility Model Content

[0003] To overcome the shortcomings of the prior art, this utility model provides an easy-open lid bubbling mold, which solves the problem that the grooves at adjacent bubbles are prone to deformation after bubbling due to the poor ductility of secondary cold-rolled iron.

[0004] The technical solution adopted in this utility model is as follows: A bubble-forming mold for easy-open lids includes an upper template and a lower template. An upper mold body is mounted on the upper template, and a lower mold body is mounted on the lower template. The upper mold body has an upper bubble-forming mold, and the lower mold body has a lower bubble-forming mold. A positioning ring is provided on the outer side of the upper mold body, and the upper template has a spring push rod for actuating the positioning ring. The mold also includes: The upper mold positioning ring is located on the outer side of the upper mold body; The ejector plate is located above the lower mold body. Through holes are provided on the spring plate for use with the pull-down bubble mold; An annular groove is provided on the top surface of the spring plate to mate with the positioning ring; An elastic reset component is located between the spring plate and the lower mold body.

[0005] The top plate is equipped with an exhaust channel.

[0006] The elastic reset elements are evenly distributed around the circumference of the spring top plate.

[0007] The elastic reset component is a spring, and the lower mold body is provided with a guide rod for cooperating with the spring.

[0008] The lower mold body is equipped with a guide sleeve for cooperating with the elastic plate. The guide sleeve includes an upper guide part and a lower guide part. The diameter of the upper guide part is larger than that of the lower guide part. The top plate is provided with a first hole for cooperating with the upper guide part and a second hole for cooperating with the lower guide part. The depth of the first hole is greater than the height of the upper guide part.

[0009] A pad is provided between the lower template and the lower mold body. The pad is equipped with a positioning pin, which passes through the pad and is connected to the lower template and the lower mold body respectively.

[0010] The beneficial effects of this utility model are: When the can lid undergoes the foaming process, the positioning ring engages with the annular groove to limit the groove of the can lid. Then, the positioning ring and the spring plate descend, and the lower foam mold extends out from the through hole to engage with the upper foam mold, thus realizing the foaming of the can lid. Since the positioning ring and the annular groove clamp and limit the groove, deformation of the groove can be prevented, thereby ensuring the quality of the product. Attached Figure Description

[0011] Figure 1 This is a cross-sectional schematic diagram of the present invention.

[0012] Figure 2 This is a cross-sectional schematic diagram of the spring plate of this utility model.

[0013] Figure 3 This is a cross-sectional schematic diagram of the guide sleeve of this utility model.

[0014] Figure 4 This is a cross-sectional schematic diagram of the lower template, pad, and lower mold body of this utility model.

[0015] Upper template 1, lower template 2, upper mold body 3, lower mold body 4, upper pull bubble mold 5, lower pull bubble mold 6, positioning ring 7, spring ejector plate 8, through hole 9, annular groove 10, elastic reset part 11, venting channel 12, guide rod 13, guide sleeve 14, upper guide part 141, lower guide part 142, hole 15, hole 2 16, pad 17, positioning pin 18, spring push rod 19. Detailed Implementation

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments: In the embodiments, such as Figure 1 , Figure 2 As shown, a bubble-forming mold for easy-open lids includes an upper mold plate 1 and a lower mold plate 2. An upper mold body 3 is mounted on the upper mold plate 1, and a lower mold body 4 is mounted on the lower mold plate 2. The upper mold body 3 is provided with an upward-pulling bubble mold 5, and the lower mold body 4 is provided with a downward-pulling bubble mold 6. A positioning ring 7 is provided on the outer side of the upper mold body 3, and the upper mold plate 1 is provided with a spring push rod 19 for actuating the positioning ring 7. The mold also includes: The spring-loaded plate 8 is located above the lower mold body 4; Through hole 9 is provided on spring top plate 8 for use with pull-down bubble mold 6; An annular groove 10 is provided on the top surface of the spring plate 8 for engaging with the positioning ring 7; The elastic reset element 11 is disposed between the spring plate 8 and the lower mold body 4.

[0017] When the can lid undergoes the foaming process, the positioning ring 7 cooperates with the annular groove 10 to limit the groove of the can lid. Then, the positioning ring 7 and the spring plate 8 descend, and the lower foam mold 6 extends out from the through hole 9 to cooperate with the upper foam mold 5 to achieve foaming of the can lid. Since the positioning ring 7 and the annular groove 10 clamp and limit the groove, the deformation of the groove can be prevented, thereby ensuring the quality of the product.

[0018] In the embodiments, such as Figure 1 , Figure 2 As shown, the top plate 8 is provided with an exhaust channel 12. Of course, the upper mold body 3 is also provided with an exhaust channel to ensure that the pressure distribution in the cavity is balanced after the upper mold body 3 and the lower mold body 4 are engaged, thereby ensuring the foaming accuracy of the can lid.

[0019] In the embodiments, such as Figure 1 , Figure 2 As shown, the elastic reset members 11 are evenly distributed around the circumference of the spring-loaded plate 8; the elastic reset members 11 are springs, and the lower mold body 4 is provided with guide rods 13 for cooperating with the springs. This ensures the linearity and smoothness of the spring-loaded plate 8's lifting and lowering.

[0020] In the embodiments, such as Figure 1 , Figure 2 , Figure 3 As shown, the lower mold body 4 is equipped with a guide sleeve 14 for cooperating with the spring-loaded plate 8. The guide sleeve 14 includes an upper guide portion 141 and a lower guide portion 142. The diameter of the upper guide portion 141 is larger than that of the lower guide portion 142. The spring-loaded plate 8 is provided with a first hole 15 for cooperating with the upper guide portion 141 and a second hole 16 for cooperating with the lower guide portion 142. The depth of the first hole 15 is greater than the height of the upper guide portion 141. To ensure the straightness of the up-and-down movement of the spring-loaded plate 8, the bottom surface of the upper guide portion 141 can act as a limit. When the bottom surface of the first hole 15 contacts the bottom surface of the upper guide portion 141, the spring-loaded plate 8 cannot rise.

[0021] In the embodiments, such as Figure 1 , Figure 4As shown, a pad 17 is provided between the lower template 2 and the lower mold body 4. A positioning pin 18 is installed on the pad 17. The positioning pin 18 passes through the pad 17 and is connected to the lower template 2 and the lower mold body 4 respectively. The positioning pin 18 positions the lower template 2, the pad 17, and the lower mold body 4 to ensure the connection accuracy of the template 2, the pad 17, and the lower mold body 4. At the same time, the upper template 1 and the upper mold body 3 are also provided with pads, which are also positioned by the positioning pin 18.

[0022] Obviously, the above embodiments of this utility model are merely illustrative examples and not intended to limit the implementation of this utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations. However, these obvious variations or modifications derived from the essential spirit of this utility model still fall within the protection scope of this utility model.

Claims

1. A bubble-forming mold for easy-open lids, comprising an upper mold plate (1) and a lower mold plate (2), wherein an upper mold body (3) is mounted on the upper mold plate (1), a lower mold body (4) is mounted on the lower mold plate (2), the upper mold body (3) is provided with an upper bubble mold (5), the lower mold body (4) is provided with a lower bubble mold (6), a positioning ring (7) is provided on the outer side of the upper mold body (3), and the upper mold plate (1) is provided with a spring push rod (19) for acting on the positioning ring (7), characterized in that, Also includes: The spring plate (8) is set above the lower mold body (4). A through hole (9) is provided on the spring top plate (8) for use with the pull-down bubble mold (6); An annular groove (10) is provided on the top surface of the spring plate (8) for engaging with the positioning ring (7); The elastic reset component (11) is disposed between the spring plate (8) and the lower mold body (4).

2. The easy-open lid foaming mold as described in claim 1, characterized in that: The top plate (8) is provided with an exhaust channel (12).

3. The easy-open lid foaming mold as described in claim 1, characterized in that: The elastic reset members (11) are evenly distributed around the top plate (8).

4. The easy-open lid foaming mold as described in claim 1, characterized in that: The elastic reset component (11) is a spring, and the lower mold body (4) is provided with a guide rod (13) for cooperating with the spring.

5. The easy-open lid foaming mold as described in claim 1, characterized in that: The lower mold body (4) is equipped with a guide sleeve (14) for cooperating with the spring plate (8). The guide sleeve (14) includes an upper guide part (141) and a lower guide part (142). The diameter of the upper guide part (141) is larger than that of the lower guide part (142). The spring plate (8) is provided with a first hole (15) for cooperating with the upper guide part (141) and a second hole (16) for cooperating with the lower guide part (142). The depth of the first hole (15) is greater than that of the upper guide part (141).

6. The easy-open lid foaming mold as described in claim 1, characterized in that: A pad (17) is provided between the lower template (2) and the lower mold body (4). A positioning pin (18) is installed on the pad (17). The positioning pin (18) passes through the pad (17) and is connected to the lower template (2) and the lower mold body (4) respectively.

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