Polyurethane foaming mold with buffering function

Abstract

The utility model discloses a polyurethane foaming mold with a buffering function, which relates to the technical field of plastic foaming molds and comprises a molding groove, an input port for injecting foaming agents is arranged on the front side of the molding groove, a heating pipeline for maintaining the temperature required by a polyurethane foaming process is arranged in the molding groove, and two sides of the molding groove are respectively provided with a fixing plate. A first hydraulic cylinder is erected between the two fixing plates, a large amount of steam is generated in the polyurethane foaming process, balance of air pressure in a molding groove is maintained through mutual cooperation of a second elastic base and a sealing cover, polyurethane is kept to be attached to a lower pressing plate all the time, and the foaming quality is improved; when foamed polyurethane is ejected out, whether cooling of the polyurethane is completed or not is detected, if the polyurethane is still kept attached to the molding groove, the first buffer seat elastically deforms, the sensing block makes contact with the pressure sensor, the pressure sensor sends a signal to the buzzing alarm, a worker is informed of detecting the foaming condition of the polyurethane, and the machining quality is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of plastic foam molds, and specifically relates to a polyurethane foam mold with a buffering function. Background Art

[0002] A polyurethane foam mold is a tool for producing foam plastic products. Foaming is a plastic processing method. Through foaming, foam plastics with countless tiny pores inside can be obtained. Foaming is often used to manufacture components with buffering functions. The foamed plastic has good elasticity. Foamed polyurethane is widely used in many fields such as packaging, heat preservation, and shock absorption.

[0003] For example, in a patent with the patent publication number CN220638706U, there is a description of an environmentally friendly polyurethane foam mold that is easy to operate. In this easy-to-operate environmentally friendly polyurethane foam mold, after the polyurethane product is formed, the limiting component is pulled, so that the block in the limiting component is separated from the card slot. Through the reaction force of the first spring, the moving block moves to the left. Through the connecting component and the first fixing plate, the upper mold is turned upwards, so that the upper mold is separated from the lower mold. This easy-to-operate environmentally friendly polyurethane foam mold cannot detect the cooling condition of the polyurethane. When moving the polyurethane, because the polyurethane is not completely cooled, part of the polyurethane still adheres to the mold surface, resulting in damage to the polyurethane during the moving process and reducing the processing quality.

[0004] Based on this, a polyurethane foam mold with a buffering function is now provided to eliminate the drawbacks of the existing device. Summary of the Utility Model

[0005] The purpose of the utility model is to provide a polyurethane foam mold with a buffering function to solve the problems in the background art.

[0006] To achieve the above purpose, the utility model provides the following technical solutions:

[0007] A polyurethane foam mold with a buffering function includes a shaping groove. An input port for injecting a foaming agent is arranged on the front side of the shaping groove. A heating pipeline for maintaining the temperature required for the polyurethane foaming process is arranged inside the shaping groove. A fixing plate is respectively arranged on both sides of the shaping groove. A first hydraulic cylinder is mounted between the two fixing plates. A lower pressing plate for shaping the polyurethane foam is arranged at the lower end of the first hydraulic cylinder. A jacking device for jacking out the polyurethane after the foaming is completed is arranged inside the shaping groove. A maintaining mechanism for dynamically adjusting the internal pressure of the mold during the foaming process is arranged on the lower pressing plate.

[0008] Based on the above technical solutions, the utility model also provides the following optional technical solutions:

[0009] In an alternative solution: The jacking device includes a fixed seat fixedly connected to the inside of the plastic molding groove. A top block for jacking up the polyurethane is slidably connected in the middle of the fixed seat. A driving structure for driving the top block to slide within the fixed seat is provided inside the fixed seat at the lower end of the top block.

[0010] In an alternative solution: The driving structure includes a second hydraulic cylinder. The output end of the second hydraulic cylinder is fixedly connected to a buffer assembly for buffering the jacking force of two buffer top blocks. In the middle of the output end of the second hydraulic cylinder, a sliding groove is fixedly connected. An alarm component for notifying the staff when the top block is blocked is slidably connected within the sliding groove.

[0011] In an alternative solution: The buffer assembly includes a first buffer seat. The fixed ends of the two first buffer seats are fixedly connected to the output end of the second hydraulic cylinder. The buffer sections of the two first buffer seats are fixedly connected to the top block.

[0012] In an alternative solution: The alarm component includes a sliding block. The upper end of the sliding block is fixedly connected to the lower end of the top block. The lower end of the sliding block is fixedly connected to a sensing block. The sliding block is slidably connected to the sliding groove. A pressure sensor is provided at the bottom of the inner wall of the sliding groove. The pressure sensor is electrically connected to the receiving end of the buzzer alarm.

[0013] In an alternative solution: The maintaining mechanism includes a ventilation groove. Two ventilation grooves for buffering a large amount of steam generated by the polyurethane foaming are provided inside the lower pressing plate. A sealing cover for providing a sealing condition for the ventilation groove is slidably connected to the ventilation groove. A regulator for adjusting the moving position of the sealing cover is fixedly connected to each side of the sealing cover.

[0014] In an alternative solution: The regulator includes a sliding seat. A sliding seat is provided on each side of the sealing cover. A second buffer seat is slidably connected inside the sliding seat. The second buffer seat is fixedly connected to the sealing cover. A transmission block is provided inside the sliding seat at the upper end of the second buffer seat.

[0015] In an alternative solution: A lubricating oil groove is provided inside the sliding groove.

[0016] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0017] 1. By providing the second elastic seat and the sealing cover, when a large amount of steam is generated during the polyurethane foaming process, the balance of the air pressure inside the plastic molding groove is maintained through the mutual cooperation of the second elastic seat and the sealing cover, keeping the polyurethane always in contact with the lower pressing plate, and improving the foaming quality.

[0018] 2. By providing the sensing block and the pressure sensor, when jacking out the polyurethane after foaming is completed, it is detected whether the polyurethane has cooled down. If the polyurethane still remains in contact with the plastic molding groove and the first buffer seat deforms elastically, the sensing block contacts the pressure sensor, and the pressure sensor sends a signal to the buzzer alarm to notify the staff to detect the polyurethane foaming situation, improving the processing quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic structural view of the present utility model.

[0020] Figure 2 This is a sectional view of the fixed seat of the present utility model.

[0021] Figure 3 This is a schematic structural view of the second hydraulic cylinder of the present utility model.

[0022] Figure 4 This is a sectional view of the lower pressing plate of the present utility model.

[0023] Figure 5 This is a schematic structural view of the sealing groove of the present utility model.

[0024] Figure 6 This is a schematic structural view of the transmission block of the present utility model.

[0025] Annotation of reference numerals in the drawings: 101. Shaping groove, 102. Fixed plate, 103. First hydraulic cylinder, 104. Lower pressing plate, 105. Input port, 201. Top block, 202. Fixed seat, 203. Second hydraulic cylinder, 204. Sliding groove, 205. Pressure sensor, 206. Sliding block, 207. Sensing block, 208. First buffer seat, 301. Ventilation groove, 302. Sealing cover, 303. Sliding seat, 304. Transmission block, 305. Second buffer seat. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0026] In order to make the objectives, technical solutions and advantages of the present utility model clearer and more understandable, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments.

[0027] In one embodiment, as Figures 1 - 6 shown, a polyurethane foaming mold with a buffering function includes a shaping groove 101. An input port 105 for injecting foaming agent is provided on the front side of the shaping groove 101. A heating pipeline for maintaining the temperature required for the polyurethane foaming process is provided inside the shaping groove 101. A fixed plate 102 is provided on each side of the shaping groove 101. A first hydraulic cylinder 103 is installed between the two fixed plates 102. A lower pressing plate 104 for shaping the polyurethane foam is provided at the lower end of the first hydraulic cylinder 103. A jacking device for jacking up the polyurethane after foaming is completed is provided inside the shaping groove 101. A maintaining mechanism for dynamically adjusting the internal pressure of the mold during the foaming process is provided on the lower pressing plate 104. The shaping groove 101 provides space for the polyurethane foaming. The fixed plates 102 provide support. The mutual cooperation of the first hydraulic cylinder 103 and the lower pressing plate 104 provides shaping conditions for the polyurethane foaming. The foaming agent is injected through the input port 105 to provide conditions for the polyurethane foaming;

[0028] In one embodiment, as Figure 2 shown, the jacking device includes a fixed seat 202, the fixed seat 202 is fixedly connected to the inside of the plastic molding groove 101, a top block 201 for jacking up the polyurethane is slidably connected in the middle of the fixed seat 202, and a driving structure for driving the top block 201 to slide in the fixed seat 202 is provided inside the fixed seat 202 at the lower end of the top block 201. The fixed seat 202 provides a sliding condition for the top block 201, and the polyurethane after foaming is jacked out by the sliding of the top block 201 inside the fixed seat 202, which is convenient for the transportation of the polyurethane after foaming and improves the working efficiency;

[0029] In one embodiment, as Figure 2 and Figure 3 shown, the driving structure includes a second hydraulic cylinder 203, and the output end of the second hydraulic cylinder 203 is fixedly connected to a buffer assembly for buffering the jacking force of the two buffer top blocks 201. A sliding groove 204 is fixedly connected in the middle of the output end of the second hydraulic cylinder 203, and an alarm member for notifying the staff when the top block 201 is blocked is slidably connected in the sliding groove 204. By arranging the second hydraulic cylinder 203 inside the fixed seat 202 at the lower end position of the top block 201, the second hydraulic cylinder 203 provides power for jacking up the polyurethane after foaming;

[0030] In one embodiment, as Figure 2 and Figure 3 shown, the buffer assembly includes a first buffer seat 208. The fixed ends of the two first buffer seats 208 are fixedly connected to the output end of the second hydraulic cylinder 203, and the buffer sections of the two first buffer seats 208 are fixedly connected to the top block 201. The second hydraulic cylinder 203 pushes the first buffer seat 208, and the first buffer seat 208 pushes the top block 201 to move upward. When the polyurethane is not completely cooled during the foaming process, the upward jacking force of the top block 201 exceeds the buffering force of the first buffer seat 208, and the first buffer seat 208 generates elastic deformation;

[0031] In one embodiment, as Figure 3 shown, the alarm member includes a sliding block 206. The upper end of the sliding block 206 is fixedly connected to the lower end of the top block 201, the lower end of the sliding block 206 is fixedly connected to a sensing block 207, the sliding block 206 is slidably connected to the sliding groove 204, a pressure sensor 205 is arranged at the bottom of the inner wall of the sliding groove 204, and the pressure sensor 205 is electrically connected to the receiving end of the buzzer alarm. When the first buffer seat 208 generates elastic deformation to make the sliding block 206 move downward, the sliding block 206 drives the sensing block 207 to contact the pressure sensor 205, the sensing block 207 activates the pressure sensor 205, and the pressure sensor 205 transmits the signal to the receiving end of the buzzer alarm, and stops jacking out the polyurethane after foaming, improving the quality of the polyurethane foaming product;

[0032] In one embodiment, asFigure 5 and Figure 6 As shown in Figure 6 , the maintaining mechanism includes a ventilation groove 301. There are two ventilation grooves 301 inside the lower pressing plate 104 for buffering a large amount of steam generated by polyurethane foaming. The ventilation groove 301 is slidably connected to a sealing cover 302 that provides a sealing condition for the ventilation groove 301. A regulator for adjusting the moving position of the sealing cover 302 is fixedly connected to each side of the sealing cover 302. During the polyurethane foaming process, a large amount of gas is generated. To ensure that the polyurethane always adheres closely to the lower pressing plate 104 during the foaming process, the steam generated during the polyurethane foaming process is discharged through the sealing cover 302.

[0033] In one embodiment, as Figure 5 and Figure 6 shown in Figure 6 , the regulator includes a sliding seat 303. A sliding seat 303 is provided on each side of the sealing cover 302. A second buffer seat 305 is slidably connected inside the sliding seat 303. The second buffer seat 305 is fixedly connected to the sealing cover 302. A transmission block 304 is provided inside the sliding seat 303 at the upper end of the second buffer seat 305 for buffering. When the gas pressure inside the shaping groove 101 is too high, the air pressure pushes the sealing cover 302 upward, and the steam is discharged from the inside of the shaping groove 101 through the ventilation groove 301. When the air pressure is balanced, the transmission block 304 pushes the second buffer seat 305 to reset, and the second buffer seat 305 drives the sealing cover 302 to reset.

[0034] The above embodiments disclose a polyurethane foaming mold with a buffering function. Among them, the polyurethane solution is injected into the interior of the shaping groove 101, and the foaming agent is injected into the interior of the shaping groove 101 through the input port 105 to start the foaming work. By starting the first hydraulic cylinder 103, the first hydraulic cylinder 103 drives the lower pressing plate 104 to move downward to shape the polyurethane. During the foaming process, a large amount of steam is generated by the polyurethane and the catalyst, and is buffered by the transmission block 304. When the gas pressure inside the shaping groove 101 is too high, the air pressure pushes the sealing cover 302 upward, and the steam is discharged from the interior of the shaping groove 101 through the ventilation groove 301. When the air pressure is balanced, the transmission block 304 pushes the second buffer seat 305 to reset, and the second buffer seat 305 drives the sealing cover 302 to reset, maintaining the polyurethane in close contact with the lower pressing plate 104. When the foaming process is over, the second hydraulic cylinder 203 is started, and the first buffer seat 208 is pushed by the second hydraulic cylinder 203, and the first buffer seat 208 pushes the top block 201 upward. If the polyurethane is not completely cooled during the foaming process, the upward pushing force of the top block 201 exceeds the buffering force of the first buffer seat 208, the first buffer seat 208 undergoes elastic deformation, the sliding block 206 moves downward, the sliding block 206 drives the sensing block 207 to contact the pressure sensor 205, the sensing block 207 activates the pressure sensor 205, and the pressure sensor 205 transmits the signal to the receiving end of the buzzer alarm, stopping the ejection of the polyurethane after foaming is completed, and continuing to cool the polyurethane to improve the quality of the polyurethane foaming product.

[0035] As described above, the above are only specific embodiments of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present application can easily think of changes or substitutions, which should all be covered by the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A polyurethane foam mold with a buffering function, comprising a shaping groove (101). An input port (105) for injecting a foaming agent is provided on the front side of the shaping groove (101). A heating pipeline for maintaining the temperature required for the polyurethane foaming process is provided inside the shaping groove (101). A fixing plate (102) is provided on each of the two sides of the shaping groove (101). A first hydraulic cylinder (103) is installed between the two fixing plates (102). A lower pressing plate (104) for shaping the polyurethane foam is provided at the lower end of the first hydraulic cylinder (103). It is characterized in that, It also includes a jacking device for jacking up the polyurethane after the foaming is completed inside the shaping groove (101), and a maintaining mechanism for dynamically adjusting the internal pressure of the mold during the foaming process is provided on the lower pressing plate (104).

2. The polyurethane foam mold with a buffering function according to claim 1, characterized in that, The jacking device includes a fixed seat (202), the fixed seat (202) is fixedly connected to the inside of the shaping groove (101), a jacking block (201) for jacking up the polyurethane is slidably connected in the middle of the fixed seat (202), and a driving structure for driving the jacking block (201) to slide inside the fixed seat (202) is provided at the lower end of the jacking block (201) inside the fixed seat (202).

3. A polyurethane foaming mold with a buffering function according to claim 2, characterized in that, The driving structure includes a second hydraulic cylinder (203), a buffer assembly for buffering the jacking force of the two buffer jacking blocks (201) is fixedly connected to the output end of the second hydraulic cylinder (203), a sliding groove (204) is fixedly connected in the middle of the output end of the second hydraulic cylinder (203), and an alarm part for notifying the staff when the jacking block (201) is blocked is slidably connected in the sliding groove (204).

4. A polyurethane foaming mold with a buffering function according to claim 3, characterized in that, The buffer assembly includes a first buffer seat (208), the fixed ends of the two first buffer seats (208) are fixedly connected to the output end of the second hydraulic cylinder (203), and the buffer sections of the two first buffer seats (208) are fixedly connected to the jacking block (201).

5. The polyurethane foam mold with a buffering function according to claim 3, characterized in that, The alarm part includes a sliding block (206), the upper end of the sliding block (206) is fixedly connected to the lower end of the jacking block (201), the lower end of the sliding block (206) is fixedly connected to a sensing block (207), the sliding block (206) is slidably connected to the sliding groove (204), a pressure sensor (205) is provided at the bottom of the inner wall of the sliding groove (204), and the pressure sensor (205) is electrically connected to the receiving end of the buzzer alarm.

6. A polyurethane foaming mold with a buffering function according to claim 1, characterized in that, The maintaining mechanism includes a ventilation groove (301), two ventilation grooves (301) for buffering a large amount of steam generated by the foaming of the polyurethane are provided inside the lower pressing plate (104), a sealing cover (302) for providing a sealing condition for the ventilation groove (301) is slidably connected to the ventilation groove (301), and a regulator for adjusting the moving position of the sealing cover (302) is fixedly connected to each side of the sealing cover (302).

7. A polyurethane foam mold with a buffering function according to claim 6, characterized in that, The regulator includes a sliding seat (303), a sliding seat (303) is provided on each side of the sealing cover (302), a second buffer seat (305) is slidably connected inside the sliding seat (303), the second buffer seat (305) is fixedly connected to the sealing cover (302), and a transmission block (304) is provided inside the sliding seat (303) at the upper end of the second buffer seat (305).

8. A polyurethane foam mold with a buffering function according to claim 3, characterized in that, A lubricating oil groove is provided in the sliding groove (204).

Images