In-mold vacuumizing popcorn sole forming mold

Abstract

The utility model discloses an intramode vacuumized popcorn sole forming 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 lower female die is provided with a dismounting structure, a plurality of air suction holes are distributed on the bottom of a lower cavity, and the air suction holes are communicated with the male die and the female die. Air inlet channels with the upper ends communicated with the air suction holes and the lower ends communicated to the bottom face of the lower female die are formed in the positions, corresponding to the air suction holes, of the lower portion of the cavity in the lower female die in a one-to-one correspondence mode, the lower female die and the upper female die are matched in an up-down overlapping mode, and buckling structures which are tightly buckled, matched and connected together are arranged on the upper female die and the lower female die. And an airtight structure in sealing fit is arranged on the overlapped surface of the upper concave die and the lower concave die. 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 in-mold vacuuming. Background Technology

[0002] Existing popcorn shoe soles are formed using a molding machine, which includes an upper mold frame and a lower mold frame. A punch is installed in the upper mold frame, and a die is located in the lower mold frame. When the upper and lower mold frames are closed, the punch and die close to form a mold cavity. After closing, the material flows through the upper mold frame and punch into the mold cavity, and then, under certain temperature and pressure, the popcorn shoe sole is formed. This type of popcorn shoe sole is lightweight and has good elasticity, making it widely used in athletic shoes. However, popcorn shoe soles are not resistant to dirt and are difficult to clean once 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 positioned between the concave and convex molds, with the projection of the film material towards the concave mold covering the cavity; the film material conveying stops. S2. The first support and the second support move closer together until the convex mold approaches 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 molding die with in-mold vacuum to solve the problem of low molding efficiency caused by existing molding dies that only allow online cutting of the film.

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

[0005] A popcorn shoe sole forming mold with in-mold 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 for detachment and installation on a mold frame, the upper cavity and the lower cavity forming the cavity, the bottom of the lower cavity having several air suction holes, and the lower die having an air inlet channel corresponding to each air suction hole at the bottom of the cavity, the upper end communicating with the air suction hole and the lower end connecting to the bottom surface of the lower die, the lower die and the upper die being stacked and fitted together, and the upper die and the lower die having a fastening structure for interlocking and connecting together, and the overlapping surface of the upper die and the lower die having a sealing and airtight structure.

[0006] The outer contour of the aforementioned concave mold matches the outer contour of the shoe sole. The upper part of the aforementioned lower concave mold has the aforementioned lower cavity. The lower part of the lower concave mold has a solid structure. A cylindrical channel extending in the vertical direction and leading to the lower bottom surface of the lower concave mold is provided at the location corresponding to each air intake hole in the lower concave mold. Several circular holes are provided at the bottom of the lower cavity corresponding to the cylindrical channel. Each circular hole forms a ring structure. The air intake hole is formed by each circular hole, and the cylindrical channel is the aforementioned air intake channel.

[0007] 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.

[0008] The upper die has an upper positioning block protruding on its outer side wall. A positioning post extends downward from the top surface of the upper positioning block. The lower die has a lower positioning block protruding on its outer side wall corresponding to the upper positioning block. The lower positioning block has a positioning recess that extends vertically through the outer side wall and allows the positioning post to extend into it.

[0009] The lower bottom surface of the lower positioning block is recessed and has a positioning groove into which the positioning pin on the mold frame extends. This positioning groove is the disassembly and assembly structure mentioned above.

[0010] The length direction of the lower die is the front-to-back direction. The lower die has lower positioning blocks on its left and right outer side walls, and the upper die has upper positioning blocks on its left and right outer side walls. The lower die has fixed positioning sleeves welded to its front and rear outer side walls. These positioning sleeves are the disassembly and assembly structure.

[0011] 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.

[0012] This utility model discloses a popcorn shoe sole molding mold with in-mold vacuuming. In application, the concave mold is directly removed from the mold frame, and then the upper and lower concave molds are separated. A pre-cut anti-fouling diaphragm 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, the entire concave mold is installed back into the mold frame. In this way, the mold frame is vacuumed before injection after the molding machine closes the mold. The vacuum pressure of the mold frame is transmitted to the lower cavity through the air inlet channel and air suction hole. The lower cavity is a sealed space through the diaphragm, and the diaphragm is attached to the inner wall of the lower cavity by the vacuum suction force. Then, the material is directly injected for molding. Compared with existing technologies, the anti-fouling membrane is installed directly outside the molding machine and then reinstalled inside. This allows workers to place the membrane on the concave mold during the molding process, and then remove the molded concave mold after molding, replacing it with the membrane-filled concave mold. This eliminates the time required for membrane placement during molding, ensuring that molding efficiency is not affected by membrane placement. Furthermore, the membrane placement operation is simple. Additionally, the concave mold and mold frame can be disassembled and installed without altering the entire molding machine; only the existing concave mold needs to be replaced. This allows the molding machine to adapt to the production of both membrane-covered and membrane-free popcorn shoe soles, demonstrating high versatility. Attached Figure Description

[0013] Figure 1 This is a three-dimensional view of the die.

[0014] Figure 2 This is a three-dimensional view of the upper concave mold;

[0015] Figure 3 This is a three-dimensional view of the lower die. Detailed Implementation

[0016] To further explain the technical solution of this utility model, a detailed description is provided below in conjunction with the accompanying drawings.

[0017] This utility model relates to an in-mold 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.

[0018] 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 air suction holes 201 are arranged on the bottom of the lower cavity 200. The lower concave mold 12 has an air inlet channel 2 located below the cavity, corresponding to each air suction hole, with its upper end communicating with the air suction hole and its lower end connecting to the bottom surface of the lower concave mold. The upper cavity 100 and the lower cavity 201... The cavity is formed by the following: the outer contour of the concave mold 1 matches the outer contour of the shoe sole. The upper part of the lower concave mold 12 has the lower cavity, that is, the upper part of the lower concave mold is a hollow structure with an open top surface, and the lower part of the lower concave mold 12 is a solid structure. A cylindrical channel extending in the vertical direction and leading to the bottom surface of the lower concave mold is provided in the lower concave mold 12 at the position corresponding to each air intake hole 201. A number of circular holes are provided at the bottom of the lower cavity corresponding to the cylindrical channel. Each circular hole forms a ring structure. The air intake hole 201 is formed by each circular hole, and the cylindrical channel is the air intake channel 2.

[0019] The upper die 11 and the lower die 12 are stacked and fitted together. The lower die 12 has a disassembly and assembly structure that can be disassembled and installed on the mold frame. The upper die 11 and the lower die 12 are provided with a fastening structure that is tightly connected to each other. The overlapping surfaces of the upper die 11 and the lower die 12 are provided with an airtight structure for sealing.

[0020] 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.

[0021] 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.

[0022] 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 lower 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. In this new invention, when the die is installed in the lower mold frame of the molding machine, a certain gap must be formed between the die and the inner bottom surface of the lower mold frame. Specifically, the height of the positioning post can be higher than the depth of the positioning groove, or a placement plate that does not fit with the lower mold frame can be suspended in the lower mold frame. That is, at least one side of the placement plate has an air passage gap with the inner side wall of the lower mold frame. The placement plate is provided with this positioning post and has an air passage hole. Each circular channel is within the air passage range. In this way, the vacuum gas in the lower mold frame can flow to each circular channel of the lower die through the air gap and the air passage hole.

[0023] In application, the diaphragm is placed on the top surface of the lower mold 12, and then the upper mold 11 is stacked on top of the lower mold 12. The pressure rod 42 is lifted upward, and the fastening rod 43 is lifted upward accordingly. The fastening rod 43 is then lifted upward again, so that the horizontal bar of the fastening rod 43 is above the horizontal section of the fastening seat 5. Finally, the pressure rod 42 is pressed down, and the downward pressure of the pressure rod 42 pulls the fastening rod 43 downward. At this time, the horizontal bar of the fastening rod 43 is pressed tightly on the horizontal section of the fastening seat 5 and cannot move downward with the downward movement of the pressure rod 42. The fastening rod 43 is fastened together with the fastening seat, and the upper mold 11 and the lower mold 12 are fastened together. A closed-loop sealing ring is used to achieve a sealing fit, thus completing the placement of the diaphragm. After the popcorn shoe sole is formed, it is demolded. Then, the lower die is removed from the lower mold frame. Next, the die with the diaphragm placed inside is placed in the lower mold frame. Placement simply requires the positioning groove on the lower die to align with the positioning pin of the lower mold frame. After placement, the lower mold frame and upper mold frame close together, forming a vacuum space. Correspondingly, the punch and die close together, forming a cavity. Before injection, the molding machine evacuates the vacuum space. The vacuum suction force flows through the circular channel into the lower cavity. The lower cavity is sealed by the diaphragm, thus forming a closed space. In this way, the vacuum suction force of the lower cavity will pull the diaphragm downward and attach it to the inner wall of the lower cavity, thereby fixing the diaphragm in the cavity. Finally, injection molding can form a dirt-resistant popcorn bottom with an outer wall and a diaphragm on the bottom surface. The dirt-resistant popcorn bottom needs to be trimmed around the diaphragm and an anti-wear outsole is attached to the bottom surface of the dirt-resistant popcorn bottom before it can be used.

[0024] Compared with existing technologies, this novel in-mold vacuum popcorn shoe sole molding die uses a sheet-like diaphragm for molding. This allows the diaphragm to be installed on the mold outside the molding machine, eliminating the need for on-line film placement on the molding machine. During the molding process, the operator can place the diaphragm on the concave mold and perform a few seconds of vacuuming before injection, eliminating the need for separate vacuum equipment. This ensures that the diaphragm placement does not conflict with the molding operation, and the molding 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 molding machine; only the original concave mold needs to be replaced. This allows the molding machine to adapt to the production of both film- and film-free popcorn shoe soles, demonstrating high versatility.

[0025] In this new invention, inherent positioning sleeves (not shown in the figure) can also be welded to the outer side walls of the front and rear ends of the lower die 12. These positioning sleeves are the disassembly and assembly structures mentioned above. Correspondingly, positioning posts are provided on the inner bottom surface of the lower die frame. The quick disassembly and assembly of the die within the lower die frame can also be achieved by using the cooperation between the positioning posts and the positioning sleeves.

[0026] 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. An in-mold vacuumed popcorn sole forming mold having a male mold and a female mold, the female mold having a cavity; characterized by: The die includes an upper die and a lower die. The upper die has an upper cavity that extends through the top and bottom, 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 mold frame. The upper cavity and the lower cavity constitute the cavity. Several air suction holes are arranged on the bottom of the lower cavity. The lower die has an air intake channel located below the cavity, corresponding to each air suction hole, with the upper end communicating with the air suction hole and the lower end connecting to the bottom surface of 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 is tightly connected together. The overlapping surface of the upper die and the lower die has a sealing and airtight structure.

2. An in-mold vacuumed popcorn sole forming mold according to claim 1, wherein: The outer contour of the aforementioned concave mold matches the outer contour of the shoe sole. The upper part of the aforementioned lower concave mold has the aforementioned lower cavity. The lower part of the lower concave mold has a solid structure. A cylindrical channel extending in the vertical direction and leading to the lower bottom surface of the lower concave mold is provided at the location corresponding to each air intake hole in the lower concave mold. Several circular holes are provided at the bottom of the lower cavity corresponding to the cylindrical channel. Each circular hole forms a ring structure. The air intake hole is formed by each circular hole, and the cylindrical channel is the aforementioned air intake channel.

3. An in-mold vacuumed popcorn sole forming mold according to claim 1, wherein: 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.

4. An in-mold vacuumed popcorn sole forming mold according to claim 1, wherein: The upper die has an upper positioning block protruding on its outer side wall. A positioning post extends downward from the top surface of the upper positioning block. The lower die has a lower positioning block protruding on its outer side wall corresponding to the upper positioning block. The lower positioning block has a positioning recess that extends vertically through the outer side wall and allows the positioning post to extend into it.

5. An in-mold vacuumed popcorn sole forming mold according to claim 4, wherein: The lower bottom surface of the lower positioning block is recessed and has a positioning groove into which the positioning pin on the mold frame extends. This positioning groove is the disassembly and assembly structure mentioned above.

6. An in-mold vacuumed popcorn sole forming mold according to claim 4, wherein: The length direction of the lower die is the front-to-back direction. The lower die has lower positioning blocks on its left and right outer side walls, and the upper die has upper positioning blocks on its left and right outer side walls. The lower die has fixed positioning sleeves welded to its front and rear outer side walls. These positioning sleeves are the disassembly and assembly structure.

7. The popcorn shoe sole forming mold with in-mold 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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