Silicone rubber products continuous two-stage punching and molding die structure

Abstract

This invention relates to the field of silicone rubber product punching die technology, specifically to a continuous two-stage punching die structure for silicone rubber products. The structure includes an inner die and an outer die disposed on one side of the inner die. A negative pressure suction assembly is provided within the inner die, comprising a punch fixedly mounted on the inner die, with a vent pipe fixedly mounted on the punch and communicating with the interior of the inner die. A first electric slide is positioned above the inner die, running along the direction of the outer die. An inner top plate is fixedly mounted on the slide base of the first electric slide, and a first hydraulic cylinder is fixedly mounted on the inner top plate. A second electric slide, perpendicular to the first electric slide, is positioned above the outer die, with an outer top plate fixedly mounted on the slide base of the second electric slide, and a second hydraulic cylinder fixedly mounted on the outer top plate. This invention eliminates the time spent manually transferring workpieces, improving processing efficiency and facilitating use.

Description

Technical Field

[0001] This invention relates to the field of die-cutting technology for silicone rubber products, and more specifically, to a die structure for integral molding of silicone rubber products through two consecutive punching operations. Background Technology

[0002] After silicone rubber products are injection molded, the gate and runner usually contain molten liquid. After the molten liquid in these areas cools, burrs will form on the surface of the silicone rubber products. In order to ensure the appearance and aesthetics of the products, the burrs on the surface of the silicone rubber products are usually punched off. When punching off, corresponding punching molds are usually used.

[0003] The invention patent with authorization announcement number CN110883207A discloses a punching forming mold, including an upper mold base and a lower mold base. The lower mold base is provided with a lower module, and the upper mold base is provided with an upper module. The upper end face of the lower module is provided with an arc-shaped annular groove for punching an arc-shaped surface. The lower module is provided with a release mechanism to facilitate the removal of the formed copper arc-shaped thin ring from the lower module. The release mechanism includes an elastic ring disposed on the upper end face of the lower module and conforming to the surface of the arc-shaped annular groove, several through holes opened on the bottom surface of the arc-shaped annular groove and penetrating the lower module, guide rods passing through the through holes and fixedly connected to the elastic rings, and a drive assembly connected to the several guide rods and driving the guide rods to rise and fall.

[0004] While this technical solution offers advantages such as simultaneously punching the sheet metal and extruding the resulting annular sheet into a copper arc-shaped thin ring, facilitating the detachment of the copper arc-shaped thin ring from the lower module, it suffers from several drawbacks. When removing burrs from the inner and outer surfaces of silicone rubber products with internal holes, the burrs on the inner hole must be removed first. After removal, the silicone rubber products with the burrs removed from the inner hole must be manually transferred one by one to the next mold for removing burrs from the outer surface. This repetitive manual material handling process is tedious, time-consuming, and prone to misplacement, causing inconvenience to the user. Therefore, we propose a continuous two-stage punching and integral molding die structure for silicone rubber products. Summary of the Invention

[0005] The purpose of this invention is to provide a mold structure for continuous two-stage punching of silicone rubber products to solve the defects mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A continuous two-stage punching mold structure for silicone rubber products includes an inner die and an outer die disposed on one side of the inner die. A negative pressure suction assembly is provided inside the inner die. The negative pressure suction assembly includes a punch fixedly installed on the inner die, and a vent pipe connected to the inside of the inner die is fixedly installed on the punch.

[0008] Above the inner punch is a first electric slide table arranged along the direction of the outer punch. An inner top plate is fixedly installed on the slide base of the first electric slide table. A first hydraulic cylinder is fixedly installed on the inner top plate. The inner punch is arranged on the telescopic shaft of the first hydraulic cylinder.

[0009] Above the outer punch, there is a second electric slide perpendicular to the first electric slide. An outer top plate is fixedly installed on the slide base of the second electric slide, and a second hydraulic cylinder is fixedly installed on the outer top plate. The outer punch is mounted on the telescopic shaft of the second hydraulic cylinder.

[0010] As a preferred technical solution, the inner punch consists of an inner upper die, an inner spring plate fixedly installed on the bottom surface of the inner upper die, and an inner lower die disposed below the inner spring plate. The punch is fixedly installed on the inner upper die and passes through the inner spring plate, which facilitates the inner upper die to fit downward against the inner lower die to complete the die closing and punching operation.

[0011] As a preferred technical solution, a rectangular plate is fixedly installed at the end of the telescopic shaft of the first hydraulic cylinder, and the inner upper mold is fixedly installed on the bottom surface of the rectangular plate by multiple fastening bolts, so as to facilitate the fixed installation of the inner upper mold on the telescopic shaft of the first hydraulic cylinder.

[0012] As a preferred technical solution, the outer punch consists of an outer upper die, an outer spring plate fixedly installed on the bottom surface of the outer upper die, and an outer lower die disposed below the outer spring plate, which facilitates the use of the outer upper die to move downward and fit against the outer lower die to complete the die closing and punching operation.

[0013] As a preferred technical solution, a steel plate is fixedly installed at the end of the telescopic shaft of the second hydraulic cylinder, and the outer upper mold is fixedly installed on the steel plate by multiple fastening bolts, so as to facilitate the fixed installation of the outer upper mold on the telescopic shaft of the second hydraulic cylinder.

[0014] As a preferred technical solution, a venting connector is fixedly installed on the venting pipe to facilitate connection of the venting connector to a corresponding connector on an external pipeline.

[0015] As a preferred technical solution, the length of the first electric slide is greater than the distance between the inner die and the outer die, so that when the first electric slide is working, it can drive the inner upper die to move below the outer lower die, thereby transferring the silicone rubber product that has finished internal punching to the outer lower die for the second punching operation.

[0016] Compared with the prior art, the beneficial effects of the present invention are:

[0017] 1. This invention, through the configuration of a first electric slide, a second electric slide, and a negative pressure suction component, allows the inner die to complete the first punching operation. After the inner die completes the first punching operation, the second electric slide drives the outer upper die backward. Negative pressure is then generated within the punch to adsorb the silicone rubber product onto the punch. The first electric slide then moves the inner upper die below the outer lower die, placing the silicone rubber product from the punch into the outer lower die. The outer upper die then resets to perform the second punching operation. This process eliminates the need for repeated manual transfer of the silicone rubber product, saving time. Furthermore, the inner upper die and outer lower die... After alignment, the silicone rubber product is placed, which helps to ensure that the placement position is not prone to error and is convenient to use. This solves the problem that when conventional punching and cutting integrated molding die structures are used to remove burrs from the inner and outer surfaces of silicone rubber products with inner holes, the burrs in the inner hole area must be removed first. After the removal is completed, the silicone rubber products with the burrs removed from the inner hole area are manually transferred one by one to the next die to remove the burrs on the outer surface. This manual material handling process is tedious, time-consuming, and prone to placement errors, causing inconvenience to users.

[0018] 2. The present invention uses a first hydraulic cylinder and a second hydraulic cylinder to facilitate the downward movement of the corresponding inner upper die and outer upper die to complete the punching operation, making it convenient to use. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0020] Figure 2 For the present invention Figure 1 Enlarged view of point A in the middle;

[0021] Figure 3 This is a partial structural schematic diagram of the present invention;

[0022] Figure 4 This is a schematic diagram illustrating the use of the present invention.

[0023] The meanings of the labels in the diagram are as follows:

[0024] 1. Inner punch die; 10. Inner upper die; 11. Inner spring plate; 12. Inner lower die;

[0025] 2. Outer punch; 20. Upper outer die; 21. Outer spring plate; 22. Lower outer die;

[0026] 3. First electric slide; 30. Inner top plate; 31. First hydraulic cylinder; 32. Rectangular plate;

[0027] 4. Second electric slide; 40. Outer top plate; 41. Second hydraulic cylinder; 42. Steel plate;

[0028] 5. Negative pressure suction assembly; 50. Punch; 51. Vent pipe; 52. Vent connector. Detailed Implementation

[0029] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0030] Please see Figures 1-4 The present invention provides a technical solution: a continuous two-stage punching mold structure for silicone rubber products, including an inner punch 1 and an outer punch 2 disposed on one side of the inner punch 1. A negative pressure suction component 5 is disposed inside the inner punch 1. The negative pressure suction component 5 includes a punch 50 fixedly installed on the inner punch 1. The punch 50 is used to punch burrs on the inner surface of the silicone rubber product.

[0031] Specifically, a vent pipe 51 connected to the inside of the inner die 1 is fixedly installed on the punch 50. A vent connector 52 is fixedly installed on the vent pipe 51, which facilitates the connection of the vent connector 52 to the corresponding connector on the external pipeline. When in use, after the punch 50 is inserted into the through hole in the silicone rubber product, the air inside the punch 50 is extracted by using an external vacuum device, creating a negative pressure inside the punch 50. This allows the silicone rubber product to be adsorbed onto the punch 50, which is beneficial for the subsequent transfer of the silicone rubber product.

[0032] In this embodiment, a first electric slide 3 is provided above the inner die 1, arranged along the direction of the outer die 2. An inner top plate 30 is fixedly installed on the slide of the first electric slide 3, and a first hydraulic cylinder 31 is fixedly installed on the inner top plate 30. The inner die 1 is arranged on the telescopic shaft of the first hydraulic cylinder 31. The inner die 1 consists of an inner upper die 10, an inner spring plate 11 fixedly installed on the bottom surface of the inner upper die 10, and an inner lower die 12 arranged below the inner spring plate 11. The punch 50 is fixedly installed on the inner upper die 10. On the upper die 10, the punch 50 passes through the inner spring plate 11, which facilitates the inner upper die 10 to be attached downward to the inner lower die 12 to complete the die closing and punching operation; a rectangular plate 32 is fixedly installed at the end of the telescopic shaft of the first hydraulic cylinder 31, and the inner upper die 10 is fixedly installed on the bottom surface of the rectangular plate 32 by multiple fastening bolts, which facilitates the fixing of the inner upper die 10 on the telescopic shaft of the first hydraulic cylinder 31, and facilitates the use of the first hydraulic cylinder 31 to drive the inner upper die 10 to move downward to complete the die closing and punching operation.

[0033] Furthermore, a second electric slide 4 is provided above the outer punch 2, perpendicular to the first electric slide 3. An outer top plate 40 is fixedly installed on the slide of the second electric slide 4, and a second hydraulic cylinder 41 is fixedly installed on the outer top plate 40. The outer punch 2 is set on the telescopic shaft of the second hydraulic cylinder 41. The outer punch 2 consists of an outer upper die 20, an outer spring plate 21 fixedly installed on the bottom surface of the outer upper die 20, and an outer lower die 22 set below the outer spring plate 21. This facilitates the outer upper die 20 to move downward and fit against the outer lower die 22 to complete the die closing and punching operation. A steel plate 42 is fixedly installed at the end of the telescopic shaft of the second hydraulic cylinder 41. The outer upper die 20 is fixedly installed on the steel plate 42 by multiple fastening bolts, which facilitates the fixed installation of the outer upper die 20 on the telescopic shaft of the second hydraulic cylinder 41.

[0034] In addition, the length of the first electric slide 3 is greater than the distance between the inner punch 1 and the outer punch 2, so that when the first electric slide 3 is working, it can drive the inner upper die 10 to move below the outer lower die 22, thereby transferring the silicone rubber product that has finished the inner punching to the outer lower die 22 for the second punching operation.

[0035] When using the continuous two-stage punching mold structure of the silicone rubber product of the present invention, firstly, the vent connector 52 is connected to the pipe of the external vacuum suction equipment. Then, the silicone rubber product is placed in the cavity of the inner lower mold 12. Next, the first hydraulic cylinder 31 is started and made to work. When the first hydraulic cylinder 31 works, the telescopic shaft on it extends and drives the inner upper mold 10 to move downward. The inner upper mold 10 moves downward and closes on the inner lower mold 12 to complete the mold closing operation. During the mold closing process, as the punch 50 moves downward, the punch 50 is inserted into the through hole in the silicone rubber product and punches the burrs on the hole wall of the through hole in the silicone rubber product. After the punching is completed, the external vacuum suction equipment is connected to the external power supply and made to work. The external vacuum suction equipment works to extract the air in the punch 50 to the outside, so that the negative pressure is generated in the punch 50, and the silicone rubber product is adsorbed on the punch 50.

[0036] Next, the second electric slide 4 is activated, driving the second hydraulic cylinder 41 and the outer upper mold 20 to move backward, making room for the inner upper mold 10. Then, the first electric slide 3 is activated, driving the first hydraulic cylinder 31 and the inner upper mold 10 to move above the outer lower mold 22. The first hydraulic cylinder 31 continues to work, placing the silicone rubber product on the punch 50 into the outer lower mold 22. Then, the power to the external vacuum suction equipment is disconnected, allowing the silicone rubber product to fall precisely into the cavity inside the outer lower mold 22. The first electric slide 3 then works, driving the first hydraulic cylinder 31 and the inner upper mold 10 back to their initial positions. The second electric slide 4 then works, driving the second hydraulic cylinder 41 and the outer upper mold 20 back to their initial positions. Finally, the second hydraulic cylinder 41 works, driving the outer upper mold 20 downward. The punching needle on the outer upper mold 20 moves downward to complete the punching operation of the burrs on the outer surface of the silicone rubber product, making it convenient to use.

[0037] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A continuous two-stage punching mold structure for silicone rubber products, characterized in that: It includes an inner punch (1) and an outer punch (2) disposed on one side of the inner punch (1). A negative pressure suction assembly (5) is provided inside the inner punch (1). The negative pressure suction assembly (5) includes a punch (50) fixedly installed on the inner punch (1). A vent pipe (51) connected to the inside of the inner punch (1) is fixedly installed on the punch (50). Above the inner punch (1) is a first electric slide (3) arranged along the direction of the outer punch (2). An inner top plate (30) is fixedly installed on the slide of the first electric slide (3). A first hydraulic cylinder (31) is fixedly installed on the inner top plate (30). The inner punch (1) is arranged on the telescopic shaft of the first hydraulic cylinder (31). Above the outer punch (2) is a second electric slide (4) perpendicular to the first electric slide (3). An outer top plate (40) is fixedly installed on the slide of the second electric slide (4). A second hydraulic cylinder (41) is fixedly installed on the outer top plate (40). The outer punch (2) is mounted on the telescopic shaft of the second hydraulic cylinder (41).

2. The continuous two-stage punching and integral molding die structure for silicone rubber products according to claim 1, characterized in that: The inner punch (1) consists of an inner upper die (10), an inner spring plate (11) fixedly installed on the bottom surface of the inner upper die (10), and an inner lower die (12) located below the inner spring plate (11). The punch (50) is fixedly installed on the inner upper die (10) and passes through the inner spring plate (11).

3. The continuous two-stage punching and integral molding die structure for silicone rubber products according to claim 2, characterized in that: A rectangular plate (32) is fixedly installed at the end of the telescopic shaft of the first hydraulic cylinder (31), and the inner upper mold (10) is fixedly installed on the bottom surface of the rectangular plate (32) by a plurality of fastening bolts.

4. The continuous two-stage punching and integral molding die structure for silicone rubber products according to claim 1, characterized in that: The outer punch (2) consists of an outer upper die (20), an outer spring material plate (21) fixedly installed on the bottom surface of the outer upper die (20), and an outer lower die (22) located below the outer spring material plate (21).

5. The continuous two-stage punching mold structure for silicone rubber products according to claim 4, characterized in that: A steel plate (42) is fixedly installed at the end of the telescopic shaft of the second hydraulic cylinder (41), and the outer upper mold (20) is fixedly installed on the steel plate (42) by a number of fastening bolts.

6. The continuous two-stage punching and integral molding die structure for silicone rubber products according to claim 1, characterized in that: A vent connector (52) is fixedly installed on the vent pipe (51).

7. The continuous two-stage punching mold structure for silicone rubber products according to claim 1, characterized in that: The length of the first electric slide (3) is greater than the distance between the inner punch (1) and the outer punch (2).

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