Vinyl elastic material for shoes and preparation device

Abstract

The invention discloses a vinyl elastic material for shoes and a preparation device, and relates to the technical field of vinyl elastic materials, and the vinyl elastic material comprises the following components by percentage: 55%-60% of an ethylene-vinyl acetate copolymer, 3%-4% of a foaming agent, 0.5%-1% of a bridging agent, 10%-15% of a filler, 2%-3% of a lubricant, 8%-12% of an elastomer, and 0.5%-1% of color master batch. The foaming agent is specifically azodicarbonamide, the azodicarbonamide can be decomposed to generate nitrogen, carbon monoxide, carbon dioxide and other gases when heated, and a microporous structure is formed in an ethylene-vinyl acetate copolymer; the bridging agent is specifically dicumyl peroxide, free radicals are generated when the bridging agent is heated, so that a chemical cross-linked network is formed among molecular chains of the ethylene-vinyl acetate copolymer, bubbles are prevented from being combined or broken in the growth process, and a uniform and fine closed pore structure is obtained; and the lubricant is specifically polyethylene wax which can reduce the melt viscosity, improve the fluidity, prevent the lubricant from being adhered to a mold during processing, and facilitate demolding.

Description

Technical Field

[0001] This invention relates to the field of vinyl elastic materials technology, specifically to a vinyl elastic material for shoes and a preparation apparatus. Background Technology

[0002] As is well known, the most commonly used vinyl elastic material for making shoes is ethylene-vinyl acetate copolymer. The vinyl acetate content in ethylene-vinyl acetate copolymers used in shoemaking is usually between 10% and 25%. Ethylene-vinyl acetate copolymers containing 10% to 20% vinyl acetate have moderate hardness and balanced mechanical properties, making them suitable for supportive components such as shoe soles. Ethylene-vinyl acetate copolymers containing 20% ​​to 25% vinyl acetate have better elasticity and are suitable for shoe components that require high resilience.

[0003] For example, the invention patent with publication number CN102341442B, publication date June 5, 2013, entitled "Elastic Particulate Foam Material Based on Polyolefin / Styrene Copolymer Mixture," relates to elastic particulate foam materials and a method for producing particulate foam materials by melting and bonding a mixture comprising foam material particles P1 and P2 composed of different thermoplastic copolymers or copolymer mixtures, wherein the foam material particles P1 are produced by pre-expanding expandable thermoplastic copolymer particles containing the following components. The following are obtained: A) 45-97.9 wt% styrene copolymer, B1) 1-45 wt% polyolefin with a melting point of 105-140℃, B2) 0-25 wt% polyolefin with a melting point below 105℃, C1) 0.1-25 wt% styrene-butadiene or styrene-isoprene block copolymer, C2) 0.0-10 wt% styrene-ethylene-butene block copolymer, D) 1-15 wt% blowing agent, E) 0-5 wt% nucleating agent, wherein the sum of A)-E) is 100 wt%.

[0004] The shortcoming of the existing technology is that before ethylene-vinyl acetate copolymer can be used in shoemaking, it needs to be mixed with additives to enhance its various properties. However, molten ethylene-vinyl acetate copolymer is very viscous and has strong adhesion to the surfaces of various materials. This means that when molten ethylene-vinyl acetate copolymer is mixed with additives, it is easy to adhere to the inner wall of the container and the stirring blades. Moreover, during stirring, the contact area between ethylene-vinyl acetate copolymer and the inner wall of the container is relatively high. The material adhering to the higher position cannot be discharged with other materials, resulting in material waste. Summary of the Invention

[0005] The purpose of this invention is to provide a vinyl elastic material for shoes and a preparation apparatus to overcome the above-mentioned shortcomings in the prior art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a vinyl elastic material for shoes, comprising the following components by percentage: 55%~60% ethylene-vinyl acetate copolymer, 3%~4% foaming agent, 0.5%~1% crosslinking agent, 10%~15% filler, 2%~3% lubricant, 8%~12% elastomer, and 0.5%~1% color masterbatch; The vinyl acetate content in the ethylene-vinyl acetate copolymer is 10% to 20%.

[0007] An apparatus for preparing a vinyl elastic material for shoes, used to prepare the vinyl elastic material for shoes according to the above-described scheme, includes a processing vessel, wherein the processing vessel is provided with: The conveying pipe is movably installed on the conveying and processing vessel; Two blade sets, each including a connecting shaft movably mounted to the bottom of the feed pipe, wherein the connecting shaft is provided with a fixed plate at the top and a plurality of sequentially arranged and hinged movable plates, the movable plates being assembled for the following two states: In the first state, the movable plate is obstructed and rotates relative to the fixed plate, and the plurality of movable plates and the fixed plate are in a spiral stepped shape; In the second state, the movable plate is directly opposite the fixed plate, and the two blade groups approach each other and rotate synchronously with the conveying pipe.

[0008] As a further description of the above technical solution: one of the connecting shafts of the blade assembly is fixedly installed on the conveying pipe and has a flow channel in the middle, and a spreading plate communicating with the flow channel is provided at the bottom of the connecting shaft.

[0009] As a further description of the above technical solution: a tenon block extending to the bottom of the feed pipe is provided on the connecting shaft of one of the blade groups, and a locking block for locking the tenon block is slidably provided on the feed pipe.

[0010] As a further description of the above technical solution: both the fixed plate and the movable plate are slidably provided with push rods inside, and the push rods move to make the fixed plate and the movable plate be on the same plane.

[0011] As a further description of the above technical solution: the interior of the processing vessel is provided with a fixing block for blocking the movable plate.

[0012] As a further description of the above technical solution: the interior of the processing vessel is provided with a movable block for blocking the spreading plate, and the movable block and the fixed block are on two different planes.

[0013] As a further description of the above technical solution: the interior of the processing vessel is provided with a guide ring for guiding the feed pipe to rotate and move up and down.

[0014] As a further description of the above technical solution: the guide ring moves down to switch the movable plate from the first state to the second state.

[0015] As a further description of the above technical solution: the movable plate is provided with an arc-shaped limiting groove coaxial with the connecting shaft, and both the fixed plate and the movable plate are provided with limiting blocks extending into the adjacent limiting groove.

[0016] In the above technical solution, the vinyl elastic material for shoes and the preparation device provided by the present invention have the following beneficial effects: During production, ethylene, vinyl acetate, initiator and chain transfer agent are injected into a high-pressure reactor and reacted under high temperature and pressure to generate ethylene-vinyl acetate copolymer. The copolymer is then introduced into a high-pressure separator for separation, separating unreacted gas. The material pressure is further reduced, and the material is introduced into a processing vessel. The material enters the processing vessel through a feed pipe, where unreacted gas moves upward and passes through a mist eliminator. The mist eliminator captures droplets in the gas and sends them back downward. Next, the mixed additive is injected into a conveying pipe, which delivers the additive to the ethylene-vinyl acetate copolymer. The motor output torque drives the gear to rotate, which in turn drives the meshing drive ring to rotate. The protrusions on the drive ring push the conveying pipe to rotate, causing the conveying pipe to move the blade assembly. The fixed plate and movable plate on the blade assembly push the material in the processing vessel to move, allowing the additive to mix with the ethylene-vinyl acetate copolymer. Furthermore, the movable plate is hinged to a connecting shaft, and during its movement with the connecting shaft, the movable plate is... The material in the processing vessel is blocked, causing the movable plate to rotate relative to the connecting shaft, becoming a spiral stepped shape (first state). Both the fixed plate and the sides of the movable plate are close to the inner wall of the processing vessel. The pushed material can only flow through the gaps in the staggered portion of the movable plate, increasing the contact probability between the ethylene-vinyl acetate copolymer and the additive by reducing the channel size, thus allowing for thorough mixing of the ethylene-vinyl acetate copolymer and the additive. After mixing is complete, the movable plate changes from the first state to the second state, with the movable plate facing the fixed plate to form a gate that blocks the mixture, while simultaneously reducing the processing capacity. The temperature inside the vessel reduces the fluidity of the mixture, making it difficult for the mixture to flow through the gap between the blade assembly and the inner wall of the vessel. Furthermore, the two blade assemblies below the feed pipe move closer together, raising the liquid level of the mixture between the two blade assemblies. This allows the mixture to come into contact with the material adhering to the inner wall of the vessel and carries that material away. At the same time, the feed pipe rotates, causing the blade assembly and the mixture between the blade assemblies to move, carrying away the material adhering to the high points of the inner wall of the vessel. After processing, the discharge pipe is opened, and the material in the vessel is discharged through the discharge pipe. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.

[0018] Figure 1 This is a schematic diagram of the overall structure provided in an embodiment of the present invention; Figure 2 This is a schematic diagram of the internal structure provided in an embodiment of the present invention; Figure 3 This is a schematic diagram of the internal structure of the connecting ring provided in an embodiment of the present invention; Figure 4 for Figure 3 Enlarged view of point A in the middle; Figure 5 for Figure 3 Enlarged view at point B in the middle; Figure 6 This is a schematic diagram of the internal structure of the conveying pipe provided in an embodiment of the present invention; Figure 7 for Figure 6 Enlarged view at point C; Figure 8 This is a schematic diagram of the internal structure of the blade assembly provided in an embodiment of the present invention; Figure 9 This is a schematic diagram of the bottom structure of the conveying pipe provided in an embodiment of the present invention; Figure 10 for Figure 9 Enlarged view at point D; Figure 11 This is a schematic diagram of the drive ring structure provided in an embodiment of the present invention; Figure 12 This is a partial structural diagram of the movable plate provided in an embodiment of the present invention.

[0019] Explanation of reference numerals in the attached figures: 1. Processing vessel; 11. Conveying pipe; 111. Drive ring; 112. Guide ring; 113. Synchronization ring; 114. Connecting rod; 115. Connecting ring; 116. First cable; 117. Insert block; 118. Push block; 119. Pressing block; 12. Blade assembly; 121. Sealing rod; 122. Connecting shaft; 123. Fixing plate; 124. Movable plate; 125. Spreading plate; 126. Push rod; 127. Tenon block; 128. Cover plate; 13. Mist eliminator; 131. Movable block; 132. Fixing block; 133. Top block; 134. Second cable; 135. Limiting groove; 136. Limiting block; 137. Locking block; 14. Feed pipe; 15. Discharge pipe; 16. Air outlet pipe. Detailed Implementation

[0020] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0021] Example 1 A vinyl elastic material for shoes comprises the following components by percentage: 55%~60% ethylene-vinyl acetate copolymer, 3%~4% foaming agent, 0.5%~1% crosslinking agent, 10%~15% filler, 2%~3% lubricant, 8%~12% elastomer, and 0.5%~1% masterbatch; The vinyl acetate content in the ethylene-vinyl acetate copolymer is 10% to 20%.

[0022] Specifically, the foaming agent is azodicarbonamide, which decomposes upon heating to produce gases such as nitrogen, carbon monoxide, and carbon dioxide, forming a microporous structure within the ethylene-vinyl acetate copolymer; the crosslinking agent is dicumyl peroxide, which generates free radicals upon heating, forming a chemical crosslinking network between the molecular chains of the ethylene-vinyl acetate copolymer and preventing bubbles from merging or rupturing during growth, resulting in a uniform and dense closed-cell structure; the lubricant is polyethylene wax, which reduces melt viscosity, improves fluidity, prevents sticking to the mold during processing, and facilitates demolding; the filler is calcium carbonate, which can partially replace the expensive ethylene-vinyl acetate copolymer, reducing costs and adjusting the support of the shoe sole; and the elastomer is a polyolefin elastomer, which significantly improves resilience and resistance to compression deformation.

[0023] Example 2 Please see Figure 1-12 This invention provides a technical solution: a device for preparing vinyl elastic material for shoes, used to prepare the vinyl elastic material for shoes in Example 1, comprising a processing vessel 1, wherein the processing vessel 1 is provided with: The conveying pipe 11 is movably installed on the conveying and processing vessel 1; Two blade assemblies 12 include a connecting shaft 122 movably mounted at the bottom of the feed pipe 11. The connecting shaft 122 is provided with a fixed plate 123 at the top and a plurality of sequentially arranged and hinged movable plates 124. The movable plates 124 are assembled for the following two states: In the first state, the movable plate 124 is obstructed and rotates relative to the fixed plate 123, and the multiple movable plates 124 and the fixed plate 123 form a spiral stepped shape (as shown in the image). Figure 2 (as shown) In the second state, the movable plate 124 and the fixed plate 123 are directly opposite each other, and the two blade sets 12 are close together and rotate synchronously with the conveying pipe 11 (as shown in the image). Figure 6 (As shown).

[0024] Specifically, a motor is rotatably mounted on the processing vessel 1, a gear is mounted on the output end of the motor, a drive ring 111 meshing with the gear is mounted on the processing vessel 1, a plurality of protrusions are mounted on the drive ring 111, and grooves corresponding to the plurality of protrusions are opened on the conveying pipe 11, and the side walls of the fixed plate 123 and the movable plate 124 are close to the inner wall of the processing vessel 1.

[0025] Furthermore, the processing vessel 1 is provided with a feed pipe 14 in the middle, an air outlet pipe 16 at the top, and a discharge pipe 15 at the bottom. Inside the processing vessel 1, there is a mist eliminator 13 located between the feed pipe 14 and the air outlet pipe 16.

[0026] Furthermore, during production, ethylene, vinyl acetate, initiator, and chain transfer agent are injected into a high-pressure reactor and reacted under high temperature and pressure to generate an ethylene-vinyl acetate copolymer. The copolymer is then introduced into a high-pressure separator to separate unreacted gases. The material pressure is further reduced, and the material is introduced into a processing vessel 1. The material enters the processing vessel 1 through a feed pipe 14, where unreacted gases rise and pass through a mist eliminator 13. The mist eliminator 13 captures droplets in the gas and returns them to the bottom. Next, the mixed additive is injected into a conveying pipe 11, which delivers the additive to the ethylene-vinyl acetate copolymer. In the ethylene-vinyl acetate copolymer, the motor output torque drives the gear to rotate, which in turn drives the drive ring 111 to rotate. The protrusions on the drive ring 111 push the feed pipe 11 to rotate, and the feed pipe 11 drives the blade assembly 12 to move. The fixed plate 123 and the movable plate 124 on the blade assembly 12 push the material in the processing vessel 1 to move, allowing the additive to mix with the ethylene-vinyl acetate copolymer. Moreover, the movable plate 124 is hinged to the connecting shaft 122. As the movable plate 124 moves with the connecting shaft 122, it is blocked by the material in the processing vessel 1, causing the movable plate 124 to rotate relative to the connecting shaft 122, becoming a spiral stepped shape (first state). Furthermore, the sides of both the fixed plate 123 and the movable plate 124 are close to the inner wall of the processing vessel 1. The pushed material can only flow through the gaps in the staggered portion of the movable plate 124. By reducing the channel, the contact probability between the ethylene-vinyl acetate copolymer and the additive is increased, thereby allowing the ethylene-vinyl acetate copolymer and the additive to mix thoroughly. After the mixing process is completed, the movable plate 124 changes from the first state to the second state. The movable plate 124 faces the fixed plate 123 to form a gate that blocks the mixture, while reducing the temperature inside the processing vessel 1, thereby reducing the fluidity of the mixture and making it less likely for the mixture to flow out between the blade assembly 12 and the inner wall of the processing vessel 1. The material flows through the gap, and the two blade groups 12 below the conveying pipe 11 move closer together (the included angle between the two blade groups 12 decreases), pushing the material between the two blade groups 12, causing the liquid level of the mixture on one side of the mixture between the two blade groups 12 to rise, and the liquid level of the mixture on the other side to fall. The part with the raised liquid level can contact the material attached to the inner wall of the processing vessel 1 and carry away this part of the material. At the same time, the conveying pipe 11 rotates, which drives the blade groups 12 and the mixture between the blade groups 12 to move, carrying away the material attached to the high point of the inner wall of the processing vessel 1. After the processing is completed, the discharge pipe 15 is opened, and the material in the processing vessel 1 is discharged through the discharge pipe 15.

[0027] In another embodiment of the present invention, a connecting shaft 122 of one of the blade groups 12 is fixedly installed on the conveying pipe 11 and has a flow channel in the middle, and a spreading plate 125 communicating with the flow channel is provided at the bottom of the connecting shaft 122.

[0028] Specifically, the flow channel inside the connecting shaft 122 is connected to the flow channel inside the conveying pipe 11. The side walls on opposite sides of the spreading plate 125 are provided with a discharge port and a cover plate 128 for closing the discharge port. The cover plate 128 is hinged to the spreading plate 125. A rotary joint for continuous flow of additives is provided between the spreading plate 125 and the connecting shaft 122.

[0029] Furthermore, as the conveying pipe 11 drives the blade assembly 12 to rotate, the spreading plate 125 pushes the material in front of it in its direction of movement and forms a temporary cavity behind it. At the same time, the additive in the conveying pipe 11 moves downward under the action of gravity, pushing the cover plate 128 behind the spreading plate 125 to rotate. The additive flows into the processing vessel 1 from the outlet corresponding to the cover plate 128, and then mixes with the ethylene-vinyl acetate copolymer. When the conveying pipe 11 changes its rotation direction, the cover plate 128 is pressed against the spreading plate 125 by the material above it, thereby sealing the outlet and preventing the mixed material from entering the spreading plate 125.

[0030] In another embodiment of the present invention, a tenon 127 extending to the bottom of a feed pipe 11 is provided on the connecting shaft 122 of one of the blade groups 12, and a locking block 137 for locking the tenon 127 is slidably provided on the feed pipe 11.

[0031] Specifically, the bottom of the feed pipe 11 is provided with an arc-shaped mortise that matches the tenon block 127. A spring is provided between the tenon block 127 and the feed pipe 11. A notch is provided on the tenon block 127 that matches the locking block 137. A spring is provided between the locking block 137 and the feed pipe 11. A ramp is provided on the side wall of the locking block 137 near the tenon block 127.

[0032] Furthermore, when the movable plate 124 switches from the first state to the second state, the two blade groups 12 approach each other. The connecting shaft 122, on which the tenon block 127 is provided, approaches the other blade group 12 with the cooperation of the tenon block 127 and the mortise. The tenon block 127 gradually approaches the locking block 137 and moves along the slope on the locking block 137. The tenon block 127 pushes the locking block 137 to retract into the feed pipe 11. When the tenon block 127 moves to the end of the mortise, the locking block 137 is directly opposite the notch on the tenon block 127. The locking block 137 is inserted into the tenon block 127 under the action of the spring, locking the tenon block 127 and the corresponding blade group 12, so that the two blade groups 12 remain in a close state.

[0033] In another embodiment of the present invention, push rods 126 are slidably provided inside both the fixed plate 123 and the movable plate 124. The push rods 126 move so that the fixed plate 123 and the movable plate 124 are on the same plane.

[0034] Specifically, the bottom of the push rod 126 is provided with a ramp, and a spring is provided between the push rod 126 and the corresponding fixed plate 123 or movable plate 124.

[0035] Furthermore, when the movable plate 124 switches from the first state to the second state, the fixed plate 123 and the adjacent lower movable plate 124 are offset, and the movable plate 124 and the adjacent lower movable plate 124 are also offset. At this time, the uppermost push rod 126 moves, and the ramp at the bottom of the push rod 126 is inserted into the lower movable plate 124 first. The movable plate 124 is pushed by the ramp and gradually faces the upper fixed plate 123 until the bottom end of the push rod 126 is inserted into the movable plate 124. At this time, the movable plate 124 and the fixed plate 123 are facing each other. The push rod 126 pushes the push rod 126 in the lower movable plate 124 to continue to move downward until multiple movable plates 124 are facing the fixed plate 123. The movable plate 124 then switches from the first state to the second state.

[0036] In another embodiment of the present invention, a guide ring 112 is slidably provided inside the processing vessel 1 to guide the feed pipe 11 to rotate and move up and down. The guide ring 112 moves down to switch the movable plate 124 from the first state to the second state.

[0037] Specifically, the inner wall of the guide ring 112 is provided with a thread that couples with the outer wall of the conveying pipe 11. A limiting rod extending into the top wall of the processing vessel 1 is provided on the guide ring 112. An electric telescopic rod is provided between the processing vessel 1 and the guide ring 112. A synchronous ring 113, rotating synchronously with the conveying pipe 11, is rotatably provided at the bottom of the guide ring 112. A connecting rod 114 is provided on the processing vessel 1. The bottom end of the connecting rod 114 extends into the synchronous ring 113 and is slidably provided with a connecting ring 115 connected to the cylindrical shaft of the synchronous ring 113. A push block 118, an insert block 117, and a push block 118 are slidably provided at the bottom of the conveying pipe 11 to push the push rod 126 in the two connecting shafts 122. A spring is provided between the insert block 117 and the conveying pipe 11, and a spring is provided between the push block 118 and the conveying pipe 11. A locking block 137 is provided between the locking block 137 and the conveying pipe 11. The spring and push block 118 are specifically arc-shaped with the tenon and groove coaxial. The tenon block 127 has a notch that matches the push block 118. A pressure block 119 is slidably arranged on the side wall above the conveying pipe 11. A second pull cable 134 is arranged between the pressure block 119 and the insert block 117, the push block 118, and the locking block 137. A spring is arranged between the pressure block 119 and the conveying pipe 11. A top block 133 is slidably arranged in the synchronization ring 113, facing the pressure block 119. A spring is arranged between the top block 133 and the synchronization ring 113. A first pull cable 116 is arranged between the top block 133 and the connecting ring 115. A sealing rod 121 extending to the two blade groups 12 is arranged below the conveying pipe 11. The sealing rod 121 can seal the gap between the two blade groups 12, reducing the leakage of the mixture between the two blade groups 12 when they come together.

[0038] Furthermore, when the motor is working, it drives the conveying pipe 11 to rotate via the drive ring 111. During rotation, the conveying pipe 11 moves up and down along the thread on the guide ring 112, causing the spreading plate 125 to evenly spread the additive into the ethylene-vinyl acetate copolymer. When the movable plate 124 switches from the first state to the second state, the electric telescopic rod extends and pushes the guide ring 112 and the synchronization ring 113 downward, allowing the conveying pipe 11 to move downward a greater distance. At this time, the connecting ring 115 in the synchronization ring 113 is pulled by the connecting rod 114 and moves relative to the synchronization ring 113. The first cable 116 between the connecting ring 115 and the top block 133 is released. Under the action of the spring, the top block 133 pushes the pressure block 119 into the conveying pipe 11 and moves it. The second cable 134 is released, and the push block 118 inserts the insert block 117 into the connecting shaft 122 with a channel in the middle under the action of the spring, and pushes the push rod 126 of the connecting shaft 122 to move, so that the connecting shaft... When the movable plate 124 in the blade group 12 corresponding to 122 switches from the first state to the second state, the push block 118 is inserted into the notch on the tenon 127 and pushes the push rod 126 in the corresponding connecting shaft 122, so that the movable plate 124 in the blade group 12 corresponding to the tenon 127 switches from the first state to the second state, and the locking block 137 protrudes from the conveying pipe 11. During the process of the tenon 127 moving along the tenon groove, the locking block 137 locks the tenon 127, the spring between the tenon 127 and the conveying pipe 11 is compressed, the conveying pipe 11 continues to rotate, allowing the blade group 12 in the first state to move, and the mixture between the two blade groups 12 in the first state can carry away the material attached to the inner wall of the processing vessel 1. The electric telescopic rod works synchronously to keep the blade group 12 close to the bottom of the processing vessel 1, so as to avoid the gap between the blade group 12 and the processing vessel 1 being too large and the liquid level of the mixture between the two blade groups 12 in the first state not being maintained.

[0039] Furthermore, after the processing is completed, the discharge pipe 15 opens, and the mixture is discharged from the discharge pipe 15. The fixed plate 123 and the movable plate 124, which are on the same vertical plane, do not obstruct the flow of the mixture, reducing the adhesion between the mixture and the blade assembly 12. When the movable plate 124 changes from the first state to the second state, it can scrape off the material on the top of adjacent movable plates 124, reducing material residue on the blade assembly 12. Then, the movable blade changes from the second state to the first state, and the electric extension... The shortening of the retracting rod causes the guide ring 112 and the synchronization ring 113 to move upward, and the connecting ring 115 moves downward relative to the synchronization ring 113 to tighten the first cable 116, causing the top block 133 to retract back into the synchronization ring 113. The pressure block 119 moves under the action of the spring, re-tightening the second cable 134. The insert block 117, the push block 118 and the locking block 137 are pulled back into the conveying pipe 11 by the second cable 134. The push rod 126 and the tenon block 127 are reset under the action of the corresponding springs, and the movable plate 124 returns to the first state.

[0040] In another embodiment of the present invention, a fixed block 132 for blocking the movable plate 124 is provided inside the processing vessel 1, and a movable block 131 for blocking the spreading plate 125 is slidably provided inside the processing vessel 1, and the movable block 131 and the fixed block 132 are on two different planes.

[0041] Specifically, the fixing block 132 corresponds to the blade assembly 12 with the tenon block 127 on the top and is used to block the movable plate 124 at the bottom of the blade assembly 12. The bottom of the spreading plate 125 has a notch that matches the fixing block 132. A spring is provided between the movable block 131 and the processing vessel 1. The top of the movable block 131 is an arc surface.

[0042] Furthermore, during the transition from the first state to the second state of the movable plate 124, the conveying pipe 11 rotates and moves downward. When it reaches the lowest point, the bottom of the two blade groups 12 is offset from the fixed block 132 and the movable block 131, respectively. Then, the electric telescopic rod extends, and the side wall of the spreading plate 125 abuts against the movable block 131. The side wall of the lowermost movable plate 124 of the other blade group 12 abuts against the fixed block 132. Then, the conveying pipe 11 rotates in the opposite direction, the spreading plate 125 is blocked by the movable block 131, and the lowermost movable plate 124 of the other blade group 12 is blocked by the fixed block 132. The rotating fixed plate 123 drives the movable plate 124 to move, so that the fixed plate 123 and the multiple movable plates 124 tend to be on the same plane. Then, the push rod 126 moves, fixing the fixed plate 123 and the multiple movable plates 124 on the same plane. The spreading plate 125 also abuts against the movable plate 124. 24 are fixed on the same plane. The conveying pipe 11 continues to rotate. The spreading plate 125 moves along the arc surface of the movable block 131 and pushes the movable block 131 to retract into the processing vessel 1. The blade group 12 corresponding to the spreading plate 125 can move with the conveying pipe 11. The other blade group 12 is blocked by the fixed block 132. The conveying pipe 11 moves relative to the tenon block 127, so that the two blade groups 12 come together. The liquid level of the mixture between the two blade groups 12 rises. Then the locking block 137 locks the tenon block 127. The conveying pipe 11 rotates in the opposite direction. The two blade groups 12 move synchronously. The mixture between the two blade groups 12 carries away the material attached to the high part of the inner wall of the processing vessel 1. Moreover, the spreading plate 125 can cross the fixed block 132, so that the inner wall of the processing vessel 1 can contact the mixture between the two blade groups 12, thereby carrying away the material attached to the high part of the inner wall of the processing vessel 1.

[0043] In another embodiment of the present invention, the movable plate 124 is provided with an arc-shaped limiting groove 135 coaxial with the connecting shaft 122, and both the fixed plate 123 and the movable plate 124 are provided with limiting blocks 136 extending into the adjacent limiting grooves 135.

[0044] Specifically, the limiting block 136 can only slide in the limiting groove 135. The limiting block 136 and the limiting groove 135 cooperate to limit the deflection angle between the movable plate 124 and the fixed plate 123 and the movable plate 124, thereby limiting the gap between the movable plates 124. This prevents the gap from being too large and causing the mixed liquid to flow too fast, ensuring that the probability of contact between the ethylene-vinyl acetate copolymer and the additive is increased with a smaller gap. Limiting the deflection angle between the movable plate 124 and the fixed plate 123 and the movable plate 124 also facilitates the movement of the push rod 126, ensuring that the bottom end of the push rod 126 can be smoothly inserted into the movable plate 124 below, thereby ensuring that the movable plate 124 can switch from the first state to the second state.

[0045] The foregoing has only described certain exemplary embodiments of the present invention by way of illustration. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the foregoing drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A vinyl elastic material for shoes, characterized in that, The product comprises the following components by percentage: 55%~60% ethylene-vinyl acetate copolymer, 3%~4% foaming agent, 0.5%~1% crosslinking agent, 10%~15% filler, 2%~3% lubricant, 8%~12% elastomer, and 0.5%~1% color masterbatch. The vinyl acetate content in the ethylene-vinyl acetate copolymer is 10% to 20%.

2. An apparatus for preparing a vinyl elastic material for shoes, used to prepare the vinyl elastic material for shoes according to claim 1, characterized in that, Includes a processing vessel (1), wherein the processing vessel (1) is provided with: The conveying pipe (11) is movably installed on the conveying and processing vessel (1); Two blade sets (12) include a connecting shaft (122) movably mounted at the bottom of the feed pipe (11), the connecting shaft (122) having an uppermost fixed plate (123) and a plurality of sequentially arranged and hinged movable plates (124), the movable plates (124) being assembled for the following two states: In the first state, the movable plate (124) is obstructed and rotates relative to the fixed plate (123), and the plurality of movable plates (124) and the fixed plate (123) are in a spiral stepped shape; In the second state, the movable plate (124) and the fixed plate (123) face each other, and the two blade groups (12) move closer together and rotate synchronously with the conveying pipe (11).

3. The apparatus for preparing a vinyl elastic material for shoes according to claim 2, characterized in that, One of the blade assembly (12) has a connecting shaft (122) fixedly installed on the conveying pipe (11) and has a flow channel in the middle. The connecting shaft (122) has a spreading plate (125) communicating with the flow channel at the bottom.

4. The apparatus for preparing a vinyl elastic material for shoes according to claim 2, characterized in that, One of the blade assembly (12) has a tenon (127) extending to the bottom of the feed tube (11) on its connecting shaft (122), and a locking block (137) for locking the tenon (127) is slidably provided on the feed tube (11).

5. The apparatus for preparing a vinyl elastic material for shoes according to claim 2, characterized in that, Both the fixed plate (123) and the movable plate (124) are slidably provided with push rods (126), and the push rods (126) move to make the fixed plate (123) and the movable plate (124) be on the same plane.

6. The apparatus for preparing a vinyl elastic material for shoes according to claim 3, characterized in that, The processing vessel (1) is provided with a fixing block (132) for blocking the movable plate (124).

7. The apparatus for preparing a vinyl elastic material for shoes according to claim 6, characterized in that, The processing vessel (1) is internally slidably provided with a movable block (131) for blocking the spreading plate (125), and the movable block (131) and the fixed block (132) are on two different planes.

8. The apparatus for preparing a vinyl elastic material for shoes according to claim 2, characterized in that, The processing vessel (1) is internally slidably provided with a guide ring (112) for guiding the feed pipe (11) to rotate and move up and down.

9. The apparatus for preparing a vinyl elastic material for shoes according to claim 8, characterized in that, The guide ring (112) moves down to switch the movable plate (124) from the first state to the second state.

10. The apparatus for preparing a vinyl elastic material for shoes according to claim 2, characterized in that, The movable plate (124) is provided with an arc-shaped limiting groove (135) coaxial with the connecting shaft (122), and both the fixed plate (123) and the movable plate (124) are provided with limiting blocks (136) extending into the adjacent limiting groove (135).

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