Out-of-mold vacuumizing popcorn sole forming mold

Abstract

The utility model discloses a popcorn sole forming die with a vacuum-pumping function outside the die, which is provided with a male die and a female die, the female die comprises an upper female die and a lower female die, the upper female die is provided with an upper cavity, the lower female die is provided with a lower cavity, a plurality of air suction holes are distributed on the bottom of the lower cavity, and the air suction holes are communicated with a vacuum chamber positioned below the lower cavity. A vacuum cavity is formed in the upper female die, a vacuum exhaust pipe communicated with the vacuum cavity is installed on the lower female die, the lower female die and the upper female die are vertically matched in an overlapped mode, buckling structures which are tightly buckled and connected together in a matched mode are arranged on the upper female die and the lower female die, and airtight structures which are matched in a sealed mode are arranged on the overlapped faces where the upper female die and the lower female die are overlapped. Compared with the prior art, the die has the advantages that the membrane can be installed outside the forming machine on the die to be operated, online membrane releasing operation on the forming machine is not needed, the forming efficiency is not affected by membrane releasing, the concave die and the die frame are disassembled and installed, the whole forming machine does not need to be changed, only the original concave die needs to be replaced, and universality is high.

Description

Technical Field

[0001] This utility model relates to the field of shoe sole production technology, and in particular to a popcorn shoe sole forming mold with external vacuum extraction. Background Technology

[0002] The existing molding process for popcorn shoe soles involves closing the upper and lower molds. After closing, the material flows from the upper mold into the mold cavity, and then the popcorn shoe sole is formed under certain temperature and pressure. This type of popcorn shoe sole is lightweight and elastic, and is widely used in sports shoes. However, popcorn shoe soles are not resistant to dirt and are difficult to clean after getting dirty, making them unsuitable for long-term wear. To overcome this problem, a type of anti-fouling popcorn shoe sole with a thin film coated on the outer surface has emerged on the market. For example, CN119348060A describes a film-coating integrated molding machine and molding process suitable for popcorn shoe soles. The process is as follows: S1. The output roller and the recovery roller cooperate to convey the film material, so that the film material is between the concave mold and the convex mold, and the projection of the film material towards the concave mold covers the cavity. The film material is then stopped being conveyed. S2. The first support and the second support move closer together until the convex mold is close to the film material, and steam is generated. Steam is introduced into the steam chamber of the punch by the steam generator. The steam is blown out towards the film material through the corresponding second air hole, and the film material softens due to heat. S3. The positive and negative pressure generator draws air into the air pressure chamber of the die to create a negative pressure state in the air pressure chamber. The first air hole generates negative pressure suction, and the film material is drawn into the cavity. Due to the extensibility of the film material after being softened by heat, the film material drawn into the cavity deforms and evenly adheres to the inner wall of the cavity. S4. The first support and the second support move closer together until the punch closes the cavity. The material is injected and filled into the cavity through the injection port. Popcorn kernels; Steam is introduced into the steam chamber of the punch by the steam generator. The steam enters the cavity through the second vent corresponding to the steam chamber, and then exits through the second vent corresponding to the exhaust chamber. The steam heats the popcorn kernels and makes their surface sticky; S5. The first support and the second support move closer together until the punch and the die are pressed together. During this process, the cutter is placed in the cutting groove to cut the film material, separating the film material in the cavity; The insert is pressed towards the cavity, and the popcorn kernels are squeezed and... The shoe sole blanks are bonded together and the film is bonded to the bottom and sides of the shoe sole blank; S6. The first support and the second support separate and move until there is a material discharge gap between the punch and the die. The positive and negative pressure generator introduces positive pressure into the air pressure chamber. The first air hole generates a thrust that pushes the shoe sole blank out of the cavity. The shoe sole blank falls out through the material discharge gap; S7. The output roller and the recovery roller rotate in cooperation to roll up the cut part of the film into the recovery roller, returning to step one, and repeating the next round to start the shoe sole molding process. However, in this molding process, the film is cut online, which prolongs the entire injection molding process, is time-consuming, and reduces molding efficiency. Utility Model Content

[0003] The purpose of this invention is to provide a popcorn shoe sole forming mold with external vacuum extraction, so as to solve the problem that existing forming molds can only cut the film online, resulting in low forming efficiency.

[0004] To achieve its purpose, this utility model adopts the following technical solution:

[0005] A popcorn shoe sole forming mold with external vacuuming has a punch and a die, the die having a cavity; the die includes an upper die and a lower die, the upper die having an upper cavity extending vertically, and the lower die having a lower cavity with an open top and a closed bottom, the lower die having a disassembly and assembly structure that can be detached and installed on a mold frame, the upper cavity and the lower cavity forming the aforementioned cavity, the bottom of the lower cavity having several suction holes, each suction hole communicating with a vacuum chamber located below the lower cavity, and the lower die having a vacuum extraction pipe communicating with the vacuum chamber, the lower die and the upper die being stacked and fitted together, the upper die and the lower die having a fastening structure that interlocks and connects them together, and the overlapping surfaces of the upper die and the lower die having a sealing and airtight structure.

[0006] The lower bottom surface of the upper die and the upper surface of the lower die are both recessed with closed-ring grooves. A closed-ring sealing gasket protruding from the closed-ring groove is embedded in each closed-ring groove. The closed-ring groove and the closed-ring sealing gasket constitute the airtight structure.

[0007] The outer side wall of the upper die is provided with an upper positioning block, and a positioning post extends downward from the top surface of the upper positioning block. The outer side wall of the lower die is provided with a lower positioning block corresponding to the upper positioning block. The outer side wall of the lower positioning block is provided with a positioning recess that extends vertically and allows the positioning post to extend into it. The bottom surface of the lower positioning block is provided with a positioning groove that allows the positioning post on the mold frame to extend into it. This positioning groove is the disassembly and assembly structure.

[0008] The outer wall of the lower die is provided with a fastening element, which has a mounting plate, a pressure rod, and a fastening rod. The mounting plate is locked in place with the outer wall of the lower die. The first end of the pressure rod extends to a wing plate extending towards the mounting plate. The mounting plate and the wing plate are movably hinged together by a pin. The fastening rod has a crossbar and two side bars. The two ends of the crossbar are connected to one end of the side bars and are integrally formed. The crossbar is on the pressure rod, and the wing plate is between the side bars. The wing plate and the side bars are movably hinged together by a pin. The outer wall of the upper die has a fastening seat corresponding to each fastening element, on which the crossbar is pressed. The fastening element and the fastening seat constitute the fastening structure.

[0009] This utility model discloses a popcorn shoe sole molding die with external vacuum. In application, the concave mold is directly removed from the mold frame, and then the upper and lower concave molds are separated. The pre-cut anti-fouling film is placed on the top surface of the lower concave mold, and the upper concave mold is stacked on top of the lower concave mold. The upper and lower concave molds are then fastened together using a snap-fit ​​structure. Finally, a vacuum pump is used to evacuate the vacuum tube, and the anti-fouling film is attracted to the inner wall of the lower concave mold. Then, the entire concave mold is installed back into the mold frame for injection molding. Compared with existing technologies, this technology allows the film to be installed on the mold outside the molding machine, eliminating the need for online film placement on the molding machine. During the molding process, the operator can first place the film on the concave mold and hold it in place. This ensures that the film placement and molding operations do not interfere with each other, and the molding efficiency is unaffected by film placement. Furthermore, the film placement operation is simple. Additionally, the concave mold and mold frame can be disassembled and installed without altering the entire molding machine; only the original concave mold needs to be replaced. This allows the molding machine to adapt to the production of both film-coated and film-free popcorn shoe soles, demonstrating high versatility. Attached Figure Description

[0010] Figure 1 This is a three-dimensional view of the die.

[0011] Figure 2 This is a three-dimensional view of the upper concave mold;

[0012] Figure 3 This is a three-dimensional view of the lower die. Detailed Implementation

[0013] To further explain the technical solution of this utility model, a detailed description is provided below in conjunction with the accompanying drawings.

[0014] This utility model relates to an external vacuum forming mold for popcorn shoe soles, such as... Figure 1-3 As shown, it has a punch (not shown in the figure) and a die 1. The die 1 has a cavity, and the side wall of the cavity has air holes. In this new invention, the punch is the same as the punch on the existing popcorn shoe sole forming machine, and the air holes in the cavity are also existing technology, which will not be repeated here.

[0015] The innovation of this utility model is as follows: the concave mold 1 has an upper concave mold 11 and a lower concave mold 12. The upper concave mold 11 has an upper cavity 100 that runs vertically through the mold, and the lower concave mold 12 has a lower cavity 200 with an open top surface. The upper cavity 100 and the lower cavity 200 constitute the cavity. Several suction holes 201 are arranged on the bottom of the lower cavity 200. Each suction hole 201 is connected to a vacuum chamber located below the lower cavity. A vacuum extraction pipe 2 connected to the vacuum chamber is installed on the lower concave mold 12. The upper concave mold 11 and the lower concave mold 12 are stacked and fitted together. The lower concave mold 12 has a disassembly and assembly structure that can be disassembled and installed on the mold frame. The upper concave mold 11 and the lower concave mold 12 are provided with a fastening structure that is tightly connected to each other. The overlapping surface of the upper concave mold 11 and the lower concave mold 12 is provided with a sealing and airtight structure.

[0016] Specifically, the lower bottom surface of the upper die 11 is recessed outside the upper cavity 100 with a closed-ring groove (not shown in the figure). A closed-ring sealing gasket 31 protruding from the lower part of the closed-ring groove is embedded in this closed-ring groove. The upper surface of the lower die 12 is recessed outside the lower cavity 200 with a closed-ring groove (not shown in the figure). A closed-ring sealing gasket 32 ​​protruding from the closed-ring groove is embedded in this closed-ring groove. The closed-ring groove and the closed-ring sealing gasket constitute the airtight structure. In application, the two closed-ring sealing gaskets make the upper die 11 and the lower die 12 fit together more tightly.

[0017] The lower die 12 has a longitudinal direction. Two interlocking fasteners are fixed to the left and right outer walls of the lower die 12. Each fastener has a mounting plate 41, a pressure rod 42, and a fastening rod 43. Preferably, there are two mounting plates 41 arranged front to back. The mounting plates 41 are locked together with the lower die 12. Specifically, each mounting plate 41 has a horizontal portion and a vertical portion perpendicular to the horizontal portion. The horizontal portion is attached to the outer wall of the lower die 12 and secured with screws. The vertical portion extends away from the lower die 12. The vertical portions of the two mounting plates 41 are fitted together front to back. The first end of the pressure rod 42 extends with two wing plates 421 that extend into the vertical portion and are spaced apart front to back. The two vertical portions are located between the two wing plates 421, and the two vertical portions are hinged to the two wing plates 421 by a pin. The components are connected together, and the pressure rod 42 can rotate up and down relative to the mounting plate 41 through this pin. The fastening rod 43 has a horizontal bar and two side bars. The two ends of the horizontal bar are connected to one end of the side bars and are integrally formed. The horizontal bar is located on the second end of the pressure rod 42. The two wing plates 421 are located between the side bars, and the two wing plates 421 and the side bars are movably hinged together by a pin. The left and right outer side walls of the upper die 11 are each locked with a fastening seat 5 corresponding to each fastening component. The fastening seat 5 has a back plate and two side wing plates. The back plate is fitted to the outer side wall of the upper die 11. The two side wing plates are arranged opposite each other, and the end of the two side wing plates facing upwards to the upper die 11 has a transverse section for the horizontal bar to be pressed on. The fastening components and the fastening seat 5 constitute the fastening structure.

[0018] Upper positioning blocks 111 are protruding on the left and right outer side walls of the upper die 11. Positioning pins 112 extend downward from the bottom surface of the upper positioning blocks 111. Lower positioning blocks 121 are protruding on the outer side wall of the lower die 12 corresponding to the upper positioning blocks 111. Positioning recesses 122 extending in the vertical direction and into which the positioning pins 111 extend are recessed on the top surface of the lower positioning blocks 121. Positioning grooves (not shown in the figure) are recessed downward from the bottom surface of the lower positioning blocks 121 into which the positioning pins on the mold frame extend. This positioning groove is the disassembly and assembly structure. In application, the positioning pins are provided on the bottom surface of the mold frame of the molding machine at the position corresponding to the lower die. The positioning grooves of the lower die 12 and the positioning pins of the mold frame can be directly aligned to realize the installation of the lower die. The disassembly and assembly are convenient. The cooperation between the positioning pins 112 and the positioning recesses 122 can guide the closing of the upper die 11 and the lower die 12.

[0019] In application, the diaphragm is placed on the top surface of the lower die 12, then the upper die 11 is stacked on top of the lower die 12. The pressure rod 42 is lifted upwards, causing the locking rod 43 to rise accordingly. The locking rod 43 is then lifted upwards again, so that its horizontal bar is above the transverse section of the locking seat 5. Finally, the pressure rod 42 is pressed downwards, pulling the locking rod 43 downwards. At this point, the horizontal bar of the locking rod 43 is pressed tightly against the transverse section of the locking seat 5 and cannot move downwards with the pressure rod 42. The locking rod 43 is locked together with the locking seat, and the upper die 11 and lower die 12 are locked together. A closed-loop sealing ring is used to achieve a sealed fit. Finally, a separate vacuum compressor is used to evacuate the vacuum extraction pipe 2. At this time, the vacuum suction of the vacuum compressor passes through the vacuum extraction pipe 2 and the vacuum chamber to each suction hole 201. The lower die 12 is shielded by the diaphragm, which makes the lower cavity 200 sealed. In this way, the suction of each suction hole 201 can draw the diaphragm downward into the lower cavity 200, so that the diaphragm fits against the inner wall of the lower cavity 200. After the molding machine finishes molding, the die 1 with the diaphragm can be directly installed in the mold frame of the molding machine for the next molding.

[0020] Compared with existing technologies, this novel popcorn shoe sole forming mold with external vacuum allows the use of sheet-like films for forming. This enables the film to be installed on the mold outside the forming machine, eliminating the need for on-line film placement on the machine. During the forming process, the operator can place the film on the concave mold and hold it in place. This ensures that the film placement and forming operations do not interfere with each other, and the forming efficiency is unaffected by film placement. Furthermore, the film placement operation is simple. The concave mold and mold frame can be disassembled and installed without altering the entire forming machine; only the existing concave mold needs to be replaced. This allows the forming machine to adapt to the production of both film-coated and film-free popcorn shoe soles, demonstrating high versatility.

[0021] The product form of this utility model is not limited to the illustrations and embodiments in this case. Any appropriate changes or modifications made to it based on similar ideas should be considered as not departing from the patent scope of this utility model.

Claims

1. A popcorn shoe sole forming mold with external vacuum extraction, comprising a punch and a die, the die having a cavity; characterized in that: The die includes an upper die and a lower die. The upper die has an upper cavity that extends vertically, and the lower die has a lower cavity that is open at the top and closed at the bottom. The lower die has a disassembly and assembly structure that can be detached and installed on the die frame. The upper cavity and the lower cavity constitute the aforementioned cavity. Several suction holes are arranged on the bottom of the lower cavity, and each suction hole is connected to a vacuum chamber located below the lower cavity. A vacuum extraction pipe connected to the vacuum chamber is installed on the lower die. The lower die and the upper die are stacked and fitted together, and the upper die and the lower die have a fastening structure that tightly connects them together. The overlapping surfaces of the upper die and the lower die have an airtight structure for sealing.

2. The popcorn shoe sole forming mold with external vacuuming according to claim 1, characterized in that: The lower bottom surface of the upper die and the upper surface of the lower die are both recessed with closed-ring grooves. A closed-ring sealing gasket protruding from the closed-ring groove is embedded in each closed-ring groove. The closed-ring groove and the closed-ring sealing gasket constitute the airtight structure.

3. The popcorn shoe sole forming mold with external vacuuming according to claim 1, characterized in that: The outer side wall of the upper die is provided with an upper positioning block, and a positioning post extends downward from the top surface of the upper positioning block. The outer side wall of the lower die is provided with a lower positioning block corresponding to the upper positioning block. The outer side wall of the lower positioning block is provided with a positioning recess that extends vertically and allows the positioning post to extend into it. The bottom surface of the lower positioning block is provided with a positioning groove that allows the positioning post on the mold frame to extend into it. This positioning groove is the disassembly and assembly structure.

4. The popcorn shoe sole forming mold with external vacuuming according to claim 1, characterized in that: The outer wall of the lower die is provided with a fastening element, which has a mounting plate, a pressure rod, and a fastening rod. The mounting plate is locked in place with the outer wall of the lower die. The first end of the pressure rod extends to a wing plate extending towards the mounting plate. The mounting plate and the wing plate are movably hinged together by a pin. The fastening rod has a crossbar and two side bars. The two ends of the crossbar are connected to one end of the side bars and are integrally formed. The crossbar is on the pressure rod, and the wing plate is between the side bars. The wing plate and the side bars are movably hinged together by a pin. The outer wall of the upper die has a fastening seat corresponding to each fastening element, on which the crossbar is pressed. The fastening element and the fastening seat constitute the fastening structure.

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