Multi-cylinder type EVA foaming machine capable of automatically opening mold

Abstract

The invention discloses a self-mold-opening multi-cylinder type EVA foaming machine, and belongs to the technical field of foaming machines, the foaming machine comprises a base and a lower support fixedly mounted on the upper surface of the base, the lower support is connected with an upper support and a lower support through support columns, the support columns and the upper support form a frame of the foaming machine, four limiting plates are mounted between the upper support and the lower support, and the four limiting plates are connected with the upper support and the lower support. A formwork is arranged in the space between the upper support and the lower support, and bayonets are formed in the four corners of the formwork and slidably connected with the four limiting plates. The automatic mold opening device is provided with the auxiliary mold opening mechanism, the mold plate can be prevented from being adhered to a material, the purpose of self-mold opening is facilitated, smooth mold opening is guaranteed, in addition, the cooling mechanism is further arranged, the mold plate can be cooled at a time in the mold opening process, material curing is facilitated, demolding is facilitated, and the mold opening efficiency is improved. And subsequent energy consumption increase caused by excessive temperature drop can be avoided, and the templates can be adsorbed with each other, so that the energy consumption of the multi-cylinder pressing die assembly can be reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of EVA foam machines, and specifically provides a multi-cylinder EVA foam machine with self-opening molds. Background Art

[0002] Traditional large EVA foam machines mostly adopt a single-cylinder structure, with the main oil cylinder located in the middle of the frame. When the oil cylinder presses the movable beam, there is a difference in the mold clamping force between the center and the periphery of the frame, resulting in uneven deformation of the frame and shortening of the fatigue life. By adding multiple auxiliary mold clamping cylinders, the force on the frame during the pressing process can be made more uniform, thereby reducing deformation and extending the service life of the equipment. When the existing multi-cylinder EVA foam machines are in use, the following technical problems still exist, such as: During the mold opening process of the existing multi-cylinder EVA foam machines, it is easy for the materials to adhere to the molds, resulting in multiple adjacent molds being unable to easily move away from each other, which is not conducive to mold opening. For example, in the multi-cylinder EVA foam machine disclosed in the publication number CN105643860B, it mainly relies on the self-weight of the heating plate on it to make the adjacent molds move away for mold opening. However, if the materials adhere to the molds, the materials between the adjacent molds will hinder the adjacent molds from separating from each other. In addition, when the existing multi-cylinder EVA foam machines are in mold opening, the temperature is relatively high, which is not conducive to the curing of the materials and thus not conducive to demolding. However, if an external cooling device is connected, the temperature will drop too much, resulting in the need to reheat the foam machine during subsequent use, thereby increasing energy consumption. Moreover, in the existing multi-cylinder EVA foam machines, the extrusion force between the molds completely relies on the main oil cylinder and the mold clamping cylinders, resulting in large energy consumption during the use of the main oil cylinder and the mold clamping cylinders, which is not conducive to reducing the energy consumption during the use of the EVA foam machine. Therefore, a multi-cylinder EVA foam machine with self-opening molds is needed to solve the above problems. Summary of the Invention

[0003] The purpose of the present invention is to provide a multi-cylinder EVA foam machine with self-opening molds to solve the problems of unsmooth mold opening, unfavorable demolding and high energy consumption of the existing multi-cylinder EVA foam machines mentioned in the above background art.

[0004] To achieve the above purpose, the present invention provides the following technical solutions: A self-opening multi-cylinder EVA foaming machine, comprising a base and a lower support fixedly installed on its upper surface. The lower support is connected to an upper support through support columns. The lower support, the support columns, and the upper support form the frame of the foaming machine. Four limit plates are installed between the upper support and the lower support, and a template is arranged in the space between the upper support and the lower support. Snap ports are provided at the four corners of the template and are slidably connected to the four limit plates. An auxiliary mold opening mechanism is installed on the template, and a cooling mechanism connected to the auxiliary mold opening mechanism is also arranged on the template. A part of the auxiliary extrusion and adsorption mechanism is arranged on the lower surface of the upper support, and the other part of the auxiliary extrusion and adsorption mechanism is arranged on the template. A multi-cylinder die pressing assembly is arranged on the lower support, and the multi-cylinder die pressing assembly is arranged below the lowest-layer template.

[0005] Preferably, the auxiliary mold opening mechanism includes a square cavity arranged inside the short side of the template, and grooves two are arranged on both sides of the template. A piston part two is movably penetrated between the groove two and the square cavity. The inner end of the piston part two is arranged inside the corresponding square cavity, and a spring two is arranged between the outer end of the piston part two and the corresponding groove two.

[0006] Preferably, the piston part two is composed of an outer plate, an inner plate, and a central rod. The central rods are evenly distributed between the outer plate and the inner plate. The piston part two penetrates through the groove two and the square cavity through the central rod. The outer plate of the piston part two fits with the corresponding groove two, and the inner plate of the piston part two is in seamless sealed sliding connection with the corresponding square cavity.

[0007] Preferably, the cooling mechanism includes a cooling channel arranged inside the template. One end of the cooling channel is connected through penetration to the corresponding square cavity. The other end of the cooling channel penetrates to the rear side of the template, and a channel joint is installed at the other end of the cooling channel.

[0008] Preferably, two cooling channels are arranged in each template, and the cooling channels are S-shaped.

[0009] Preferably, the auxiliary extrusion and adsorption mechanism includes a docking cavity one and a docking cavity two. The docking cavity two is arranged on the lower surface of the uppermost-layer template and the upper surface of the lowermost-layer template. The docking cavity one is arranged on the template at the middle position. The docking cavity one penetrates through the upper and lower sides of the corresponding template. The docking cavity two is a sunken structure with only one opening.

[0010] Preferably, the auxiliary extrusion and adsorption mechanism further includes a thick circular cavity and a thin circular cavity arranged inside the upper support. The corresponding thick circular cavity and thin circular cavity are connected through a communication hole. Four thick circular cavities and four thin circular cavities are provided, corresponding to the positions of the four docking cavities two on the uppermost-layer template respectively. The upper end of a guide air pipe is hermetically and movably inserted into the thin circular cavity, and the lower end of the guide air pipe is fixedly connected to the upper surface of the template. The guide air pipe penetrates through the thin circular cavity and the corresponding docking cavity two.

[0011] Preferably, a limiting disc which is seamlessly and slidably connected to the thin circular cavity is arranged at the end of the air guide pipe extending into the thin circular cavity, and through holes penetrating through the inner and outer sides thereof are arranged on the limiting disc. Rubber rings are arranged at the open ends of the first docking cavity and the second docking cavity, so as to form a sealed space after all the first docking cavities and all the second docking cavities are connected.

[0012] Preferably, the auxiliary extrusion and adsorption mechanism further includes a first groove arranged on the lower surface of the upper support, wherein the first groove corresponds to the position of the thick circular cavity. A first piston member penetrates between the thick circular cavity and the first groove, and the upper end of the first piston member is seamlessly and slidably connected to the inner side of the thick circular cavity. A first spring is arranged between the lower end of the thick circular cavity and the first groove.

[0013] Preferably, the first piston member is of an I-shaped structure, and its lower end fits with the corresponding first groove. The middle part of the first piston member hermetically and movably penetrates between the thick circular cavity and the first groove.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: The multi-cylinder EVA foaming machine with self-opening mold is provided with an auxiliary mold opening mechanism, which can prevent the template from sticking to the material, helps to achieve the purpose of self-opening mold, and ensures smooth mold opening. In addition, a cooling mechanism is also provided, which can cool the template once during the mold opening process. This not only helps the material to solidify, thus facilitating demolding, but also can avoid excessive temperature drop leading to increased subsequent energy consumption, and can also make the templates adsorb each other, thereby helping to reduce the energy consumption of the multi-cylinder die pressing assembly: 1. During the operation of the multi-cylinder die pressing assembly, when all the templates come into contact with each other, the second piston member will gradually move into the corresponding square cavity, thereby squeezing the gas in the square cavity and compressing the second spring. When the multi-cylinder die pressing assembly no longer squeezes the template, the second spring resets, which will cause the adjacent templates to have the kinetic energy to move away from each other, thus preventing the problem of unsmooth mold opening caused by the adhesion of the material to the template. 2. During the process of the second piston member gradually moving into the corresponding square cavity, the coolant in the cooling channel will be discharged from the foaming machine, and when the second spring resets, the coolant will instantaneously enter the cooling channel, thereby performing a one-time cooling. This kind of cooling will not cause the temperature of the template to drop too much instantaneously, thus helping the material to solidify and facilitating demolding. 3. After all the templates come into contact with each other, the first docking cavity and the second docking cavity will form a sealed space. Then, when the uppermost template gradually approaches the upper support, the first piston member will be squeezed, so that the thick circular cavity absorbs the gas in the thin circular cavity, resulting in a negative pressure in the sealed space formed by the first docking cavity and the second docking cavity, which helps all the templates to adsorb and squeeze each other, thereby reducing the energy consumption when the multi-cylinder die pressing assembly is used. Description of the Drawings

[0015] Figure 1 This is a front view structural schematic diagram of the present invention; Figure 2 This is a rear view structural schematic diagram of the present invention; Figure 3 This is a partial sectional view structural schematic diagram of the present invention; Figure 4 This is the present invention Figure 3 A magnified structural schematic diagram of point A in; Figure 5 This is a longitudinal sectional view structural schematic diagram of the template of the present invention; Figure 6 This is the present invention Figure 5 A magnified structural schematic diagram of point B in; Figure 7 This is a transverse sectional view structural schematic diagram of the template of the present invention; Figure 8 This is the present invention Figure 7 A magnified structural schematic diagram of point C in; Figure 9 This is a partial sectional view structural schematic diagram of the upper support of the present invention; Figure 10 This is the present invention Figure 9 A magnified structural schematic diagram of point D in.

[0016] In the figure: 1, base; 2, lower support; 3, support column; 4, upper support; 5, limit plate; 6, template; 7, multi-cylinder die pressing assembly; 8, thick circular cavity; 9, thin circular cavity; 10, communication hole; 11, piston part one; 12, air guide pipe; 13, groove one; 14, spring one; 15, square cavity; 16, groove two; 17, piston part two; 18, spring two; 19, cooling channel; 20, docking cavity one; 21, channel joint; 22, docking cavity two. Specific embodiments

[0017] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0018] Please refer to Figures 1-10 , the present invention provides the following technical solutions: Embodiment 1: To solve the problem that in the process of mold opening of conventional multi-cylinder EVA foam machines, it is easy for materials to adhere to the mold, resulting in the inability to smoothly achieve the self-mold-opening function relying on the gravity of the mold itself, the following technical solutions are provided. Specifically, a multi-cylinder EVA foam machine with self-mold-opening function includes a base 1 and a lower support 2 fixedly installed on its upper surface. The lower support 2 is connected to an upper support 4 through support columns 3. The lower support 2, support columns 3, and upper support 4 form the frame of the foam machine. Four limit plates 5 are installed between the upper support 4 and the lower support 2. And a template 6 is arranged in the space between the upper support 4 and the lower support 2. The four corners of the template 6 are provided with bayonets for sliding connection with the four limit plates 5. An auxiliary mold-opening mechanism is installed on the template 6.

[0019] The auxiliary mold-opening mechanism includes a square cavity 15 arranged inside the short side of the template 6. And grooves two 16 are arranged on both sides of the template 6. A piston part two 17 movably penetrates between the groove two 16 and the square cavity 15. The inner end of the piston part two 17 is arranged inside the corresponding square cavity 15. And a spring two 18 is arranged between the outer end of the piston part two 17 and the corresponding groove two 16. During use, through the multi-cylinder die pressing assembly 7, the multi-layer templates 6 are made to approach each other. During this process, the corresponding piston parts two 17 will be squeezed against each other, and then the piston part two 17 will gradually move into the corresponding square cavity 15. At this time, the spring two 18 between the piston part two 17 and the corresponding groove two 16 is compressed. During the subsequent demolding process, the spring two 18 will instantly reset, thereby causing a mutual thrust between two adjacent templates 6, avoiding the problem that the self-mold-opening function cannot be smoothly achieved due to the adhesion of the template 6 to the material. The piston part two 17 is composed of an outer plate, an inner plate, and a central rod. Among them, the central rods are evenly distributed between the outer plate and the inner plate. And the piston part two 17 penetrates through the groove two 16 and the square cavity 15 through the central rod. The outer plate of the piston part two 17 fits with the corresponding groove two 16. And the inner plate of the piston part two 17 is in seamless sealed sliding connection with the corresponding square cavity 15.

[0020] Embodiment 2: To solve the problem that in the process of mold opening of conventional multi-cylinder EVA foam machines, it is not conducive to cooling the mold, resulting in the inability of the material to quickly solidify and being not conducive to demolding, the following technical solutions are provided. Specifically, a cooling mechanism connected to the auxiliary mold-opening mechanism is further arranged on the template 6.

[0021] The cooling mechanism includes a cooling channel 19 arranged inside the template 6. One end of the cooling channel 19 is connected through to the corresponding square cavity 15, and the other end of the cooling channel 19 penetrates to the rear side of the template 6. A channel joint 21 is installed on the other end of the cooling channel 19. There are two cooling channels 19 in each template 6, and the cooling channel 19 is S-shaped. During use, it is necessary to connect the channel joint 21 to a container filled with cooling oil through a hose (such as a hose made of EPDM material). During the process that the multi-layer templates 6 approach each other, causing the piston part two 17 to gradually move into the corresponding square cavity 15, the gas in the square cavity 15 will enter the cooling channel 19, and then squeeze the cooling oil in the cooling channel 19 back into the container filled with cooling oil. During the mold opening process, through the reset of the spring two 18, the air pressure in the square cavity 15 is reduced, so that the hose will transport the cooling oil in the container to the cooling channel 19, thereby realizing the one-time cooling of the template 6, which helps to accelerate the curing of the material, facilitates subsequent demolding, and will not cause the temperature of the template 6 to drop too much, resulting in the problem of requiring more energy consumption during subsequent use.

[0022] Embodiment Three: To solve the problem that the previous multi-cylinder EVA foam machine cannot make the molds adsorb to each other, which is not conducive to reducing the energy consumption of the main oil cylinder and the auxiliary mold clamping cylinder, the following technical solution is provided. Specifically, a part of the auxiliary extrusion and adsorption mechanism is arranged on the lower surface of the upper support 4, and the other part of the auxiliary extrusion and adsorption mechanism is arranged on the template 6. A multi-cylinder mold pressing assembly 7 is arranged on the lower support 2, and the multi-cylinder mold pressing assembly 7 is arranged below the lowermost template 6.

[0023] The auxiliary extrusion and adsorption mechanism includes a first docking cavity 20 and a second docking cavity 22. The second docking cavity 22 is provided on the lower surface of the uppermost template 6 and the upper surface of the lowermost template 6. The first docking cavity 20 is provided in the template 6 at the middle position. The first docking cavity 20 penetrates through the upper and lower sides of the corresponding template 6. The second docking cavity 22 is a concave structure with only one opening. The auxiliary extrusion and adsorption mechanism further includes a first groove 13 provided on the lower surface of the upper support 4. The first groove 13 corresponds to the position of the thick circular cavity 8. A first piston member 11 penetrates between the thick circular cavity 8 and the first groove 13. The upper end of the first piston member 11 is slidably connected to the inner side of the thick circular cavity 8 without a gap. A first spring 14 is provided between the lower end of the thick circular cavity 8 and the first groove 13. The auxiliary extrusion and adsorption mechanism further includes a thick circular cavity 8 and a thin circular cavity 9 provided in the upper support 4. The corresponding thick circular cavity 8 and thin circular cavity 9 are connected through a communication hole 10. Four thick circular cavities 8 and four thin circular cavities 9 are provided, corresponding to the four second docking cavities 22 on the uppermost template 6 respectively. The upper end of an air duct 12 is hermetically and movably inserted into the thin circular cavity 9, and the lower end of the air duct 12 is fixedly connected to the upper surface of the template 6. The air duct 12 penetrates through the thin circular cavity 9 and the corresponding second docking cavity 22. During use, the multiple templates 6 approach each other, causing the corresponding rubber rings to contact, so that the second docking cavities 22 at the upper and lower positions and the first docking cavity 20 at the middle position form a sealed space. After all the templates 6 are in contact, they continue to move upward, causing the uppermost template 6 to squeeze the first piston member 11 and make it move upward. During the upward movement of the first piston member 11, it absorbs the gas in the thin circular cavity 9 through the communication hole 10, so that the air duct 12 absorbs the gas in the sealed space formed by the second docking cavity 22 and the first docking cavity 20, resulting in a decrease in the air pressure in the sealed space, so that the multiple templates 6 can be adsorbed and squeezed against each other, and thus the energy consumption of the main oil cylinder and the auxiliary die closing cylinder can be relatively reduced.

[0024] The end of the air duct 12 extending into the thin circular cavity 9 is provided with a limit disc that is slidably connected to the thin circular cavity 9 without a gap, and through holes penetrating its inner and outer sides are provided on the limit disc. Rubber rings are provided at the open ends of the first docking cavity 20 and the second docking cavity 22 for forming a sealed space after all the first docking cavities 20 and all the second docking cavities 22 are connected. The first piston member 11 is of an I-shaped structure, and its lower end fits with the corresponding first groove 13. The middle part of the first piston member 11 hermetically and movably penetrates between the thick circular cavity 8 and the first groove 13.

[0025] The content not described in detail in this specification belongs to the prior art well-known to those skilled in the art.

[0026] Although embodiments of the present invention have been shown and described, those of ordinary skill in the art will appreciate that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A self-opening multi-cylinder EVA foaming machine, comprising a base (1) and a lower support (2) fixedly mounted on the upper surface thereof, characterized in that: The lower support (2) is connected to the upper support (4) via a support column (3); the lower support (2), the support column (3) and the upper support (4) constitute a frame of the foaming machine; four limit plates (5) are installed between the upper support (4) and the lower support (2); a template (6) is provided in the space between the upper support (4) and the lower support (2); four corners of the template (6) are provided with bayonet holes slidably connected to the four limit plates (5); an auxiliary mold opening mechanism is installed on the template (6); and a cooling mechanism connected to the auxiliary mold opening mechanism is also provided on the template (6); a portion of the auxiliary extrusion adsorption mechanism is provided on the lower surface of the upper support (4); and another portion of the auxiliary extrusion adsorption mechanism is provided on the template (6); a multi-cylinder die assembly (7) is provided on the lower support (2); and the multi-cylinder die assembly (7) is provided below the bottommost template (6).

2. The self-opening multi-cylinder EVA foaming machine according to claim 1, characterized in that: The auxiliary mold opening mechanism comprises a square cavity (15) arranged in the short side of the template (6), and two grooves (16) are arranged on both sides of the template (6), and a piston part (17) movably penetrates between the two grooves (16) and the square cavity (15), the inner end of the two piston parts (17) is arranged inside the corresponding square cavity (15), and a spring (18) is arranged between the outer end of the two piston parts (17) and the corresponding two grooves (16).

3. A self-opening multi-cylinder EVA foaming machine according to claim 2, characterized in that: The second piston member (17) is composed of an outer plate, an inner plate and a center rod, wherein the center rod is evenly distributed between the outer plate and the inner plate, and the second piston member (17) passes through the second groove (16) and the square cavity (15) through the center rod, the outer plate of the second piston member (17) matches the corresponding second groove (16), and the inner plate of the second piston member (17) is seamlessly sealed and slidably connected to the corresponding square cavity (15).

4. The self-opening multi-cylinder EVA foaming machine according to claim 3, characterized in that: The cooling mechanism comprises a cooling channel (19) arranged inside the template (6), and one end of the cooling channel (19) penetrates and connects to the corresponding square cavity (15), and the other end of the cooling channel (19) penetrates to the rear side of the template (6), and a channel joint (21) is installed on the other end of the cooling channel (19).

5. The self-opening multi-cylinder EVA foaming machine according to claim 4, characterized in that: Two cooling channels (19) are provided in each template (6), and the cooling channels (19) are S-shaped.

6. The self-opening multi-cylinder EVA foaming machine according to claim 5, characterized in that: The auxiliary extrusion adsorption mechanism comprises a docking cavity 1 (20) and a docking cavity 2 (22), wherein the docking cavity 2 (22) is arranged on the lower surface of the uppermost template (6) and the upper surface of the lowermost template (6), and the docking cavity 1 (20) is arranged on the template (6) at the middle position, the docking cavity 1 (20) runs through the upper and lower sides of the corresponding template (6), and the docking cavity 2 (22) is a recessed structure with only one opening.

7. The self-opening multi-cylinder EVA foaming machine according to claim 6, characterized in that: The auxiliary extrusion and adsorption mechanism further comprises a coarse circular cavity (8) and a fine circular cavity (9) arranged in the upper support (4), and the corresponding coarse circular cavity (8) and the fine circular cavity (9) are connected through a connecting hole (10), and the coarse circular cavity (8) and the fine circular cavity (9) are each arranged in four, corresponding to the positions of the four docking cavities (22) on the uppermost template (6), and the upper end of the air guide tube (12) is sealed and movably extended into the fine circular cavity (9), and the lower end of the air guide tube (12) is fixedly connected to the upper surface of the template (6), wherein the air guide tube (12) passes through the fine circular cavity (9) and the corresponding docking cavity (22).

8. The self-opening multi-cylinder EVA foaming machine according to claim 7, characterized in that: The end of the air guide tube (12) extending into the thin circular cavity (9) is provided with a limit disc which is seamlessly slidably connected to the thin circular cavity (9), and the limit disc is provided with a through hole which passes through both the inner and outer sides thereof. The opening ends of the docking cavity one (20) and the docking cavity two (22) are both provided with a rubber ring, so that after all the docking cavities one (20) and all the docking cavities two (22) are connected, a sealed space is formed.

9. The self-opening multi-cylinder EVA foaming machine according to claim 8, characterized in that: The auxiliary extrusion and adsorption mechanism further comprises a groove one (13) arranged on the lower surface of the upper support (4), wherein the groove one (13) corresponds to the position of the coarse circular cavity (8), a piston member one (11) passes through between the coarse circular cavity (8) and the groove one (13), and the upper end of the piston member one (11) is seamlessly slidably connected to the inner side of the coarse circular cavity (8), and a spring one (14) is arranged between the lower end of the coarse circular cavity (8) and the groove one (13).

10. The self-opening multi-cylinder EVA foaming machine according to claim 9, characterized in that: The piston member 1 (11) is an I-shaped structure, and its lower end is matched with the corresponding groove 1 (13). The middle sealing movement of the piston member 1 (11) penetrates between the thick circular cavity (8) and the groove 1 (13).

Images