Preparation process of anti-skid PU (Poly Urethane) sole
By setting a specific stirring and driving mechanism in the PU sole preparation process, the problems of bubbles and shear forces in high-speed stirring are solved, and more uniform mixing and higher quality PU sole products are achieved.
Patent Information
- Application Number
- CN202510046487.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-13
- Publication Date
- 2025-05-02
AI Technical Summary
In the existing PU sole preparation process, bubbles and excessive shear force are easily generated during high-speed stirring and mixing, resulting in a decrease in product compactness and strength, affecting the quality and performance of the final product.
A preparation process for anti-slip PU soles is adopted. By setting a specific stirring mechanism, driving mechanism and spoiler mechanism in the stirring tank, the stirring speed and flow field are controlled, bubble generation and shear force are reduced, and uniform mixing is ensured.
It effectively reduces bubble generation, improves mixing uniformity, enhances the compactness and strength of the final product, improves the anti-slip and wear resistance of the PU sole, and improves the product quality.
Smart Images
Figure CN119910828A_ABST
Abstract
Description
Technical Field
[0001] The invention belongs to the technical field of anti-skid sole preparation, and in particular relates to a preparation process of an anti-skid PU sole. Background Art
[0002] PU soles are made of polyurethane materials. Polyurethane is a synthetic polymer material, usually made by the reaction of isocyanate and polyol. PU soles have excellent properties such as lightness, comfort, and strong wear resistance, and are widely used in sports shoes, casual shoes, work shoes and other fields. The preparation process of PU soles includes: ingredient preparation, mixing reaction, heating and curing, casting molding, cooling and demoulding, post-processing and other steps. In these processes, the ratio of reactants, temperature control, molding process, surface treatment, etc. all play a decisive role in the performance and quality of the final sole.
[0003] The existing PU sole preparation method is to first stir and mix the original liquid of each component in the PU raw material, then inject it into a mold for heating and foaming, and then cool and shape it to obtain the finished sole. The finished product has the problem of no anti-slip effect or poor anti-slip effect, which has great limitations in the field of shoemaking. At the same time, when the PU sole is mixed, in order to ensure uniform mixing, the PU sole original liquid needs to be stirred at a high speed, which leads to the following technical problems in the mixing process: During the high-speed stirring and mixing process, on the one hand, air will be drawn into the mixture, causing bubbles to form. These bubbles will affect the density and strength of the final product, greatly reducing the product quality of the PU soles produced; on the other hand, the high liquid flow rate is prone to produce a large shear force, resulting in a higher degree of deformation of the molecules or particles of the fluid, causing the sensitive polymers in the original liquid to degrade or decompose, further affecting the quality and performance of the final product. Summary of the invention
[0004] The purpose of the present invention is to address the problems raised in the above background technology and to provide a preparation process for an anti-slip PU sole having the characteristics of lightness, anti-skid, wear resistance, etc., which can protect the human body from falling when walking on smooth ground.
[0005] In order to achieve the above object, the present invention adopts the following technical solutions: A preparation process of an anti-slip PU sole, comprising: Step 1, heat the PU anti-slip stock solution A and B components to 40℃-45℃ respectively; Step 2, adding 1.7% of component C to component A and mixing evenly to form component AC; Step 3, add the mixed AC component into tank A of the PU pouring machine, and add the B component into tank B of the PU pouring machine; Step 4, preheating the sole mold to 60°C, mixing components A and B in a mixing tank at high speed, and then injecting them into the front and rear positions of the bottom of the sole mold cavity through a metering pump of a PU casting machine, and the injection amount is 5% to 10% of the cavity volume; Step 5, injecting a conventional stock solution into the mold cavity to cover the PU anti-slip stock solution just injected, pressing the upper mold and the lower mold together to bond with the PU anti-slip stock solution, and after foaming and cooling to form, first opening the upper mold, and then taking out the sole from the lower mold to obtain the PU anti-slip sole; In the step 1, component A of the PU anti-slip stock solution is polyester polyol, and component B is polyurethane. In the step 2, component C is a catalyst, and the component ratio of the formula is: (A+C): B=100:48; The sole mold in steps 4-5 comprises an upper mold and a lower mold, the fitting surfaces of the upper mold and the lower mold are in the shape of the bottom of the shoe last, and the lower mold has a mold cavity, the shape of the mold cavity is the shape of the sole.
[0006] Preferably, the stirring tank in step 4 comprises: Tank; A stirring mechanism, used to reduce the generation of bubbles during stirring, the stirring mechanism includes a fixed internal gear fixedly connected to the top of the tank body, an annular slide groove is provided on the inner top wall of the tank body, an arc block is slidably connected to the inner wall of the annular slide groove along a circumferential trajectory, a first gear meshing with the fixed internal gear is rotatably installed below the arc block, a rotating outer gear ring is rotatably connected to the inner top of the tank body, the inner wall of the rotating outer gear ring is meshed with the fixed internal gear, an outer sleeve is rotatably connected to the lower end of the first gear, a first gear ring is fixedly connected to the peripheral side wall of the outer sleeve, a second gear ring meshing with the first gear ring is fixedly connected to the inner wall of the tank body, an inner sleeve is rotatably connected inside the outer sleeve, an extension sleeve is fixedly connected to the inner top wall of the outer sleeve, an inner spiral rod is fixedly connected to the position where the extension sleeve extends to the bottom of the inner sleeve, a third gear ring is fixedly connected to the peripheral side wall of the inner sleeve, a second gear meshing with the third gear ring is fixedly connected to the bottom of the fixed internal gear, and an outer spiral rod is fixedly connected to the position where the inner sleeve extends to the bottom of the outer sleeve; The driving mechanism is used to adjust the rotation speed of the outer gear ring according to the stirring time.
[0007] Preferably, the diameter of the inner spiral rod is smaller than the diameter of the outer spiral rod.
[0008] Preferably, the driving mechanism includes a driving rod rotatably connected to the top wall of the tank body, the bottom end of the driving rod is fixedly connected to a third gear meshing with the outer wall of the rotating outer gear ring, the upper end of the tank body is fixedly connected to a DC motor for controlling the rotation of the driving rod, the upper wall of the tank body is fixedly connected to a control channel, the inner wall of the control channel is sealingly and slidably connected to a piston plate, the upper end of the piston plate is fixedly connected to an L-shaped rod, the upper end of the tank body is fixedly connected to a sliding rheostat controlled by the L-shaped rod, and the DC motor is connected in series with the power supply device through the sliding rheostat.
[0009] Preferably, the sliding rheostat comprises a resistance rod fixedly connected to the upper end of the tank body, a sliding piece is slidably connected to the resistance rod, and the L-shaped rod is fixedly connected to the sliding piece.
[0010] Preferably, an automatic pressure relief valve is provided on the piston plate.
[0011] Preferably, a spoiler mechanism is also provided inside the tank body for reducing dead angle areas during the stirring process, the spoiler mechanism comprises a liquid storage cylinder fixedly connected to the lower end of the arc block, the inner top wall of the liquid storage cylinder is rotatably connected to a rotating rod, the rotating rod is coaxially fixedly inserted in the first gear, the part of the rotating rod located in the liquid storage cylinder is provided with a reciprocating threaded section, the inner wall of the liquid storage cylinder is slidably connected to a lifting block in a vertical direction, and the lifting block is sleeved on the reciprocating threaded section, the lower end of the lifting block is fixedly connected to a piston block, and the piston block is sealingly and slidably connected to the inner wall of the liquid storage cylinder, the rotating rod passes through the piston block, and the rotating rod and the piston block are sealed and slidably connected, a liquid guide cavity connected to the space below the liquid storage cylinder is opened inside the rotating rod, and a linear array on the peripheral side wall of the rotating rod has multiple groups of pushing components controlled by the piston plate.
[0012] Preferably, each group of the pushing components includes a fixed cylinder fixedly connected to the outer wall of the rotating rod, and the fixed cylinder is communicated with the interior of the liquid guiding cavity, the inner wall of the fixed cylinder is sealingly and slidably connected with a push rod, the part of the push rod extending outside the fixed cylinder is fixedly connected with a spoiler, and a liquid storage space is formed between the space below the piston block in the liquid storage cylinder, the liquid guiding cavity and the interior of the fixed cylinder, the liquid storage space is filled with hydraulic oil, and a limit block is fixedly connected to the push rod to prevent the push rod from detaching from the fixed cylinder.
[0013] Compared with the existing technology, the advantages of the preparation process of the anti-slip PU sole are:
[0014] 1. The present invention first injects a PU anti-skid stock solution with a non-skid and wear-resistant formula into the original sole mold, and injects the PU anti-skid stock solution into the front and rear positions of the sole mold, that is, the contact surface of the sole with the ground, and injects a conventional stock solution into other positions of the sole mold, heats and foams, and cools and forms to obtain a sole product. The obtained anti-skid sheet is located at the front and rear positions of the bottom of the sole that contact the ground, has the characteristics of light weight, non-skid, wear resistance, etc., plays the purpose of protecting the human body from falling when walking on a smooth ground, and effectively improves the application of PU soles in the shoemaking industry.
[0015] 2. The present invention sets a stirring mechanism. During the stirring process, the first gear is driven to rotate by rotating the outer gear ring, so that the first gear can perform a circular motion along the fixed inner gear. During this process, the outer sleeve and the inner sleeve rotate in opposite directions during the circular motion, so that the rotational motions of the inner spiral rod and the outer spiral rod interact with each other in opposite directions, thereby generating a smoother mixing flow field, preventing air from being drawn into the stock liquid, and being able to effectively destroy bubbles and prevent air from being drawn into the stock liquid, thereby reducing the generation of bubbles.
[0016] 3. The present invention sets a driving mechanism. In the initial stage of stirring, the air pressure in the tank is the same as the external atmospheric pressure. At this time, the piston plate is at the lowest position in the control channel, and the power of the DC motor is the smallest. Therefore, a lower stirring speed is used for preliminary mixing in the initial stage of stirring. As the stirring proceeds, the PU anti-slip stock solution releases gas due to chemical reaction during mixing. The generation of these gases will cause the air pressure in the tank to continue to increase with the stirring time, causing the piston plate to move upward in the control channel, and the power of the DC motor to increase, thereby gradually increasing the stirring speed to achieve a uniform mixing effect, avoiding the application of excessive shear force at one time, resulting in excessive shearing of the liquid, and ensuring the final product performance.
[0017] 4. The present invention sets a spoiler mechanism. When the arc block drives the liquid storage cylinder to perform circular motion, the rotating rod is driven to rotate relative to the liquid storage cylinder, so that the piston block reciprocates vertically in the liquid storage cylinder, and the push rod is continuously extended and retracted relative to the fixed cylinder, so that the spoiler reciprocates to push the mixed liquid outward, plays a spoiler role in the stirring process, reduces the formation of dead angle areas, improves the uniformity of mixing, and further improves the quality of the produced anti-slip PU soles. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 It is a three-dimensional structural schematic diagram of the present invention; Figure 2 It is a cross-sectional structural schematic diagram of the present invention; Figure 3 yes Figure 2 The enlarged view of point A in the middle; Figure 4 It is a cross-sectional structural schematic diagram of the present invention from another angle; Figure 5 yes Figure 4 The enlarged view of point B in the middle; Figure 6 It is a schematic cross-sectional structure diagram of the spoiler mechanism in the present invention; Figure 7 yes Figure 6 Enlarged view of point C in the middle.
[0019] In the figure: 1, tank body; 2, stirring mechanism; 21, fixed inner gear; 22, annular slide; 23, arc block; 24, first gear; 25, rotating outer gear ring; 26, outer sleeve; 27, first gear ring; 28, second gear ring; 29, inner sleeve; 210, extension cylinder; 211, inner spiral rod; 212, third gear ring; 213, second gear; 214, outer spiral rod; 3, driving mechanism; 31, driving rod; 32, third gear; 33, DC motor; 34, control channel; 35, piston plate; 36, L-shaped rod; 37, resistance rod; 38, slide; 4, spoiler mechanism; 41, liquid storage cylinder; 42, rotating rod; 43, reciprocating threaded section; 44, lifting block; 45, piston block; 46, liquid guide cavity; 47, pushing assembly; 471, fixed cylinder; 472, push rod; 473, spoiler. DETAILED DESCRIPTION
[0020] The following examples are for illustrative purposes only and are not intended to limit the scope of the present invention.
[0021] Example: Refer to Figures 1 to 7 , a preparation process of a non-slip PU sole, comprising: Step 1, heat the PU anti-slip stock solution A and B components to 40℃-45℃ respectively; Step 2, adding 1.7% of component C to component A and mixing evenly to form component AC; Step 3, add the mixed AC component into tank A of the PU pouring machine, and add the B component into tank B of the PU pouring machine; Step 4, preheating the sole mold to 60°C, mixing components A and B in a mixing tank at high speed, and then injecting them into the front and rear positions of the bottom of the sole mold cavity through a metering pump of a PU casting machine, and the injection amount is 5% to 10% of the cavity volume; Step 5, injecting a conventional stock solution (the conventional stock solution includes polyurethane, catalyst, foaming agent, etc.) into the mold cavity to cover the PU anti-slip stock solution just injected, pressing the upper mold and the lower mold together to bond with the PU anti-slip stock solution, and after foaming and cooling, first opening the upper mold, and then taking out the sole from the lower mold to obtain the PU anti-slip sole; In step 1, component A of the PU anti-slip stock solution is polyester polyol, and component B is polyurethane. In step 2, component C is a catalyst, and the component ratio of the formula is: (A+C): B=100:48; Specifically, polyurethane (component B) is a hardener in the polyurethane reaction, reacting with polyester polyol (component A) to form a polyurethane chain, and polyester polyol (component A) acts as the main softener, reacting with polyurethane (component B) to form a polyurethane polymer.
[0022] The sole mold in steps 4-5 includes an upper mold and a lower mold. The fitting surfaces of the upper mold and the lower mold are in the shape of the bottom of the shoe last. The lower mold has a mold cavity, and the shape of the mold cavity is the shape of the sole.
[0023] In view of the problem that the PU soles made in the prior art have no anti-skid effect or have a poor anti-skid effect, which has great limitations in the field of shoemaking, the present invention first injects a PU anti-skid stock solution with a formula of anti-skid and wear-resistant into the original sole mold, and injects the anti-skid stock solution into the front and rear positions of the sole mold, that is, the contact surface between the sole and the ground, and injects a conventional stock solution into other positions of the sole mold, heats and foams, and cools and forms to obtain a sole product. The obtained anti-skid sheet is located at the front and rear positions of the bottom of the sole that contact the ground, has the characteristics of light weight, anti-skid, wear resistance, etc., and plays the purpose of protecting the human body from falling when walking on smooth ground, and effectively improves the application of PU soles in the shoemaking industry.
[0024] In step 4, the specific structure of the stirring tank includes: The tank body 1 has a feed port for conveying component A and component B, and a discharge pipe for discharging the mixed component AB fixedly connected to the side wall of the tank body 1, and an opening and closing valve is arranged in the discharge pipe. During the stirring process, the opening and closing valve is in a closed state to prevent the raw materials from overflowing; The stirring mechanism 2 is used to reduce the generation of bubbles during the stirring process. The stirring mechanism 2 includes a fixed internal gear 21 fixedly connected to the inner top of the tank body 1. The inner top wall of the tank body 1 is provided with an annular groove 22. The inner wall of the annular groove 22 is slidably connected with an arc block 23 along a circumferential trajectory. A first gear 24 meshing with the fixed internal gear 21 is rotatably installed below the arc block 23. A rotating outer gear ring 25 is rotatably connected to the inner top of the tank body 1. The inner wall of the rotating outer gear ring 25 meshes with the fixed internal gear 21. The lower end of the first gear 24 is rotatably connected to an outer sleeve 26. The outer sleeve 26 is fixedly connected to the peripheral side wall. A first gear ring 27, a second gear ring 28 meshing with the first gear ring 27 is fixedly connected to the inner wall of the tank body 1, an inner sleeve 29 is rotatably connected inside the outer sleeve 26, an extension sleeve 210 is fixedly connected to the inner top wall of the outer sleeve 26, an inner spiral rod 211 is fixedly connected to the extension sleeve 210 extending to the position below the inner sleeve 29, a third gear ring 212 is fixedly connected to the peripheral side wall of the inner sleeve 29, a second gear 213 meshing with the third gear ring 212 is fixedly connected below the fixed inner gear 21, and an outer spiral rod 214 is fixedly connected to the position below the inner sleeve 26 when the inner sleeve 29 extends; Specifically, the diameter of the inner spiral rod 211 is smaller than the diameter of the outer spiral rod 214, and the inner spiral rod 211 and the outer spiral rod 214 are coaxial inside and outside to prevent interference.
[0025] In view of the problem in the prior art that in the high-speed stirring process, air is drawn in, causing bubbles to be generated in the mixture, and these bubbles will affect the density and strength of the final product, greatly reducing the quality of the produced PU sole product, the present invention sets a stirring mechanism 2. During stirring, the first gear 24 is driven to rotate by rotating the outer gear ring 25, so that the first gear 24 can perform a circular motion along the fixed inner gear 21, and then the outer sleeve 26 and the inner sleeve 29 are driven to perform a circular motion through the arc block 23 to mix the A component and the B component of the PU sole. During this process, the first gear ring 27 on the outer sleeve 26 and the third gear ring 212 on the inner sleeve 29 perform a circular motion along the second gear ring 28 and the second gear 213 respectively, so that the outer sleeve 26 and the inner sleeve 29 rotate in opposite directions during the circular motion, and then the rotational motions of the inner spiral rod 211 and the outer spiral rod 214 interact with each other in opposite directions, generating a smoother mixing flow field, preventing air from being drawn into the stock solution, and being able to effectively destroy bubbles and prevent air from being drawn into the stock solution, thereby reducing the generation of bubbles.
[0026] The driving mechanism 3 is used to adjust the rotation speed of the rotating outer gear ring 25 according to the stirring time. The driving mechanism 3 includes a driving rod 31 rotatably connected to the inner top wall of the tank body 1, and the bottom end of the driving rod 31 is fixedly connected to a third gear 32 meshing with the outer wall of the rotating outer gear ring 25. The upper end of the tank body 1 is fixedly connected to a DC motor 33 for controlling the rotation of the driving rod 31. The upper wall of the tank body 1 is fixedly connected to a control channel 34, and the inner wall of the control channel 34 is sealingly and slidably connected to a piston plate 35. The upper end of the piston plate 35 is fixedly connected to an L-shaped rod 36, and the upper end of the tank body 1 is fixedly connected to a sliding rheostat controlled by the L-shaped rod 36, and the DC motor 33 is connected in series with the power supply device through the sliding rheostat.
[0027] Specifically, the sliding rheostat includes a resistance rod 37 fixedly connected to the upper end of the tank body 1, a slider 38 is slidably connected to the resistance rod 37, and an L-shaped rod 36 is fixedly connected to the slider 38. When the slider 38 is at the lower end of the resistance rod 37, the resistance value of the circuit where the DC motor 33 is located is at a maximum. As the slider 38 moves upward, the resistance value of the circuit where the DC motor 33 is located will continue to decrease, thereby realizing the adjustment of the power of the DC motor 33.
[0028] Specifically, an automatic pressure relief valve is provided on the piston plate 35 , and the automatic pressure relief valve can automatically open after the air pressure in the tank body 1 increases to a certain level, so as to discharge the gas in the tank body 1 and avoid excessive air pressure in the tank body 1 .
[0029] In view of the problem in the prior art that the initial flow rate of the liquid is high, which easily generates a large shear force, resulting in a higher degree of deformation of the molecules or particles of the fluid, causing the sensitive polymers in the raw liquid to degrade or decompose, and further affecting the quality and performance of the final product, the present invention sets a driving mechanism 3. During stirring, the DC motor 33 drives the driving rod 31 and the third gear 32 to rotate, thereby driving the rotating outer gear ring 25 to rotate, so that the stirring mechanism 2 starts to work. In the initial stage of stirring, the air pressure in the tank body 1 is the same as the external atmospheric pressure. At this time, the piston plate 35 is at the lowest position in the control channel 34, so that the slide 38 is at the lowest position of the resistance rod 37, so that the resistance value of the circuit where the DC motor 33 is located is the largest and the current is the smallest, thereby minimizing the power of the DC motor 33, so that the third gear 32 drives the first gear 31 to rotate by rotating the outer gear ring 25. The speed of the circular motion of the wheel 24 is the slowest, so a lower stirring speed is used for preliminary mixing at the initial stage of stirring. As stirring proceeds, the PU anti-slip stock solution will release gas (such as carbon dioxide, a common by-product of polyurethane reaction) due to chemical reaction during mixing. The generation of these gases will cause the air pressure in the tank body 1 to continue to increase with the stirring time, so that the piston plate 35 moves upward in the control channel 34, and the slide 38 slides upward on the resistance rod 37, so that the resistance value of the circuit where the DC motor 33 is located is smaller, the current increases, the power of the DC motor 33 increases, and the speed of the circular motion of the first gear 24 increases. As stirring proceeds, the stirring speed is gradually increased to achieve a uniform mixing effect, avoid applying too much shear force at one time, resulting in excessive shearing of the liquid, causing degradation or decomposition of components, and ensuring the final product performance.
[0030] A spoiler mechanism 4 is also provided inside the tank body 1 for reducing dead angle areas during the stirring process. The spoiler mechanism 4 includes a liquid storage cylinder 41 fixedly connected to the lower end of the arc block 23. The inner top wall of the liquid storage cylinder 41 is rotatably connected to a rotating rod 42. The rotating rod 42 is coaxially fixedly inserted in the first gear 24. The portion of the rotating rod 42 located in the liquid storage cylinder 41 is provided with a reciprocating threaded section 43. The inner wall of the liquid storage cylinder 41 is slidably connected to a lifting block 44 in the vertical direction, and the lifting block 44 is sleeved on the reciprocating threaded section 43. The lower end of the lifting block 44 is fixedly connected to a piston block 45, and the piston block 45 is sealingly and slidably connected to the inner wall of the liquid storage cylinder 41. The rotating rod 42 passes through the piston block 45, and the rotating rod 42 and the piston block 45 are sealed and slidably connected. A liquid guide cavity 46 connected to the space below the liquid storage cylinder 41 is provided inside the rotating rod 42. A linear array on the peripheral side wall of the rotating rod 42 has multiple groups of pushing components 47 controlled by the piston plate 35.
[0031] Specifically, each group of pushing components 47 includes a fixed cylinder 471 fixedly connected to the outer wall of the rotating rod 42, and the fixed cylinder 471 is communicated with the interior of the liquid guiding cavity 46. The inner wall of the fixed cylinder 471 is sealed and slidably connected with a push rod 472. The part of the push rod 472 extending outside the fixed cylinder 471 is fixedly connected with a spoiler 473. A liquid storage space is formed between the space below the piston block 45 in the liquid storage cylinder 41, the liquid guiding cavity 46 and the interior of the fixed cylinder 471. The liquid storage space is filled with hydraulic oil. A limit block is fixedly connected to the push rod 472 for preventing the push rod 472 from detaching from the fixed cylinder 471.
[0032] In order to avoid the existence of large dead angle areas during the high-speed stirring and mixing of the AB stock solution, these dead angle areas refer to areas where the fluid flow is uneven, stagnant or slow inside the stirring device, which often lead to incomplete or uneven mixing, resulting in some products not meeting quality requirements, thereby increasing waste and rework costs, the present invention provides a spoiler mechanism 4. In the process of the arc block 23 driving the liquid storage cylinder 41 to perform a circular motion, since the first gear 24 will perform a circular motion along the fixed internal gear 21, the first gear 24 will drive the rotating rod 42 to rotate relative to the liquid storage cylinder 41, so that the lifting block 44 can move along the rotating rod 42. The reciprocating threaded section 43 on the rod 42 performs reciprocating vertical displacement, driving the piston block 45 to perform reciprocating vertical displacement in the liquid storage cylinder 41, continuously transporting the hydraulic oil in the liquid storage cylinder 41 to a plurality of fixed cylinders 471 through the liquid guide cavity 46, and continuously transporting the hydraulic oil in a plurality of fixed cylinders 471 back to the liquid storage cylinder 41 through the liquid guide cavity 46, so that the push rod 472 can be continuously extended and retracted relative to the fixed cylinder 471, so that the spoiler 473 reciprocates to push the mixed liquid outward, plays a spoiler role in the stirring process, reduces the formation of dead corner areas, improves the uniformity of mixing, and further improves the quality of the produced anti-slip PU soles.
[0033] The present invention can be explained by the following operation mode: When the A and B components are stirred and mixed at high speed, the driving rod 31 and the third gear 32 are driven to rotate by the DC motor 33, and then the rotating outer gear ring 25 is driven to rotate, and the first gear 24 is further driven to rotate, so that the first gear 24 can perform a circular motion along the fixed inner gear 21, and then the outer sleeve 26 and the inner sleeve 29 are driven to perform a circular motion through the arc block 23, so that the A component and the B component of the PU sole are mixed. In this process, the first gear ring 27 on the outer sleeve 26 and the third gear ring 212 on the inner sleeve 29 perform a circular motion along the second gear ring 28 and the second gear 213 respectively, so that the outer sleeve 26 and the inner sleeve 29 rotate in opposite directions during the circular motion, so that the rotational motions of the inner spiral rod 211 and the outer spiral rod 214 interact with each other in opposite directions; In the initial stage of stirring, the air pressure in the tank 1 is the same as the external atmospheric pressure. At this time, the piston plate 35 is at the lowest position in the control channel 34, so that the slide 38 is at the lowest position of the resistance rod 37, and the power of the DC motor 33 is the smallest, so that the third gear 32 drives the first gear 24 to move in a circular motion by rotating the outer gear ring 25 at the slowest speed, so that a lower stirring speed is used for preliminary mixing in the initial stage of stirring; As stirring proceeds, the PU anti-slip stock solution will release gas due to chemical reaction during mixing. The generation of these gases will cause the air pressure in the tank body 1 to increase continuously with the stirring time, so that the piston plate 35 moves upward in the control channel 34, causing the slide 38 to slide upward on the resistance rod 37, increasing the power of the DC motor 33, increasing the speed of the circular motion of the first gear 24, and gradually increasing the stirring speed to achieve a uniform mixing effect, avoiding excessive shear force applied at one time; In the process of the arc block 23 driving the liquid storage cylinder 41 to perform circular motion, the rotating rod 42 rotates relative to the liquid storage cylinder 41, and the lifting block 44 drives the piston block 45 to reciprocate vertically in the liquid storage cylinder 41, continuously transporting the hydraulic oil in the liquid storage cylinder 41 to a plurality of fixed cylinders 471 through the liquid guide cavity 46, and continuously transporting the hydraulic oil in a plurality of fixed cylinders 471 back to the liquid storage cylinder 41 through the liquid guide cavity 46, so that the push rod 472 can be continuously extended and retracted relative to the fixed cylinder 471, so that the spoiler 473 reciprocates to push the mixed liquid outward, thereby playing a spoiler role in the stirring process.
[0034] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims
1. A process for preparing a non-slip PU sole, characterized in that: include: Step 1, heat the PU anti-slip stock solution A and B components to 40℃-45℃ respectively; Step 2, adding 1.7% of component C to component A and mixing evenly to form component AC; Step 3, add the mixed AC component into tank A of the PU pouring machine, and add the B component into tank B of the PU pouring machine; Step 4, preheating the sole mold to 60°C, mixing components A and B in a mixing tank at high speed, and then injecting them into the front and rear positions of the bottom of the sole mold cavity through a metering pump of a PU casting machine, and the injection amount is 5% to 10% of the cavity volume; Step 5, injecting a conventional stock solution into the mold cavity to cover the PU anti-slip stock solution just injected, pressing the upper mold and the lower mold together to bond with the PU anti-slip stock solution, and after foaming and cooling to form, first opening the upper mold, and then taking out the sole from the lower mold to obtain the PU anti-slip sole; In the step 1, component A of the PU anti-slip stock solution is polyester polyol, and component B is polyurethane. In the step 2, component C is a catalyst, and the component ratio of the formula is: (A+C): B=100:48; The sole mold in steps 4-5 comprises an upper mold and a lower mold, the fitting surfaces of the upper mold and the lower mold are in the shape of the bottom of the shoe last, and the lower mold has a mold cavity, the shape of the mold cavity is the shape of the sole.
2. The preparation process of the anti-slip PU sole according to claim 1, characterized in that: The stirring tank in step 4 comprises: Tank (1); The stirring mechanism (2) is used to reduce the generation of bubbles during the stirring process. The stirring mechanism (2) comprises a fixed internal gear (21) fixedly connected to the inner top of the tank body (1). The inner top wall of the tank body (1) is provided with an annular groove (22). The inner wall of the annular groove (22) is slidably connected to an arc block (23) along a circumferential trajectory. A first gear (24) meshing with the fixed internal gear (21) is rotatably installed below the arc block (23). The inner top of the tank body (1) is rotatably connected to a rotating outer gear ring (25). The inner wall of the rotating outer gear ring (25) meshes with the fixed internal gear (21). The lower end of the first gear (24) is rotatably connected to an outer sleeve (26). The circumferential side wall of the outer sleeve (26) is fixedly connected to a first gear (24). a first toothed ring (27), a second toothed ring (28) meshing with the first toothed ring (27) being fixedly connected to the inner wall of the tank body (1), an inner sleeve (29) being rotatably connected inside the outer sleeve (26), an extension sleeve (210) being fixedly connected to the inner top wall of the outer sleeve (26), an inner spiral rod (211) being fixedly connected to the extension sleeve (210) extending to a position below the inner sleeve (29), a third toothed ring (212) being fixedly connected to the circumferential side wall of the inner sleeve (29), a second gear (213) meshing with the third toothed ring (212) being fixedly connected below the fixed internal gear (21), and an outer spiral rod (214) being fixedly connected to the inner sleeve (29) extending to a position below the outer sleeve (26); The driving mechanism (3) is used to adjust the rotation speed of the outer gear ring (25) according to the stirring time.
3. The preparation process of the anti-slip PU sole according to claim 2, characterized in that: The spiral diameter of the inner spiral rod (211) is smaller than the spiral diameter of the outer spiral rod (214).
4. The preparation process of the anti-slip PU sole according to claim 2, characterized in that: The driving mechanism (3) comprises a driving rod (31) rotatably connected to the inner top wall of the tank body (1); the bottom end of the driving rod (31) is fixedly connected to a third gear (32) meshing with the outer wall of the rotating outer gear ring (25); the upper end of the tank body (1) is fixedly connected to a DC motor (33) for controlling the rotation of the driving rod (31); the upper wall of the tank body (1) is fixedly connected to a control channel (34); the inner wall of the control channel (34) is sealingly and slidably connected to a piston plate (35); the upper end of the piston plate (35) is fixedly connected to an L-shaped rod (36); the upper end of the tank body (1) is fixedly connected to a sliding rheostat controlled by the L-shaped rod (36); and the DC motor (33) is connected in series with a power supply device via the sliding rheostat.
5. The preparation process of the anti-slip PU sole according to claim 4, characterized in that: The sliding rheostat comprises a resistance rod (37) fixedly connected to the upper end of the tank body (1), a sliding plate (38) being slidably connected to the resistance rod (37), and the L-shaped rod (36) being fixedly connected to the sliding plate (38).
6. The process for preparing the anti-slip PU sole according to claim 4, characterized in that: An automatic pressure relief valve is provided on the piston plate (35).
7. The process for preparing the anti-slip PU sole according to claim 4, characterized in that: The tank body (1) is further provided with a flow disturbance mechanism (4) for reducing a dead angle during the stirring process. The flow disturbance mechanism (4) comprises a liquid storage cylinder (41) fixedly connected to the lower end of the arc block (23). The inner top wall of the liquid storage cylinder (41) is rotatably connected to a rotating rod (42). The rotating rod (42) is coaxially fixedly inserted in the first gear (24). The portion of the rotating rod (42) located in the liquid storage cylinder (41) is provided with a reciprocating threaded section (43). The inner wall of the liquid storage cylinder (41) is slidably connected to a lifting block (44) in a vertical direction. The lifting block (44) is 4) is sleeved on the reciprocating threaded section (43), the lower end of the lifting block (44) is fixedly connected to a piston block (45), and the piston block (45) is sealingly slidably connected to the inner wall of the liquid storage cylinder (41), the rotating rod (42) passes through the piston block (45), and the rotating rod (42) and the piston block (45) are sealed and slidably connected, the rotating rod (42) is provided with a liquid guide cavity (46) connected to the space below the liquid storage cylinder (41), and the peripheral side wall of the rotating rod (42) is linearly arrayed with multiple groups of pushing components (47) controlled by the piston plate (35).
8. The process for preparing the anti-slip PU sole according to claim 7, characterized in that: Each group of the pushing components (47) comprises a fixed cylinder (471) fixedly connected to the outer wall of the rotating rod (42), and the fixed cylinder (471) is communicated with the interior of the liquid guiding cavity (46), the inner wall of the fixed cylinder (471) is sealingly and slidably connected to a push rod (472), and the part of the push rod (472) extending outside the fixed cylinder (471) is fixedly connected to a spoiler (473), and a liquid storage space is formed between the space below the piston block (45) in the liquid storage cylinder (41), the liquid guiding cavity (46) and the interior of the fixed cylinder (471), and the liquid storage space is filled with hydraulic oil, and a limit block is fixedly connected to the push rod (472) for preventing the push rod (472) from escaping from the fixed cylinder (471).