High-quality production process for integrally-formed shoes

Abstract

The invention discloses a high-quality production process for integrally-formed shoes. The production process comprises the following steps that S1, EVA finished product raw materials are put into injection molding equipment; s2, accurately controlling the temperature of each section of injection molding equipment, and melting the EVA finished product raw material to form a melt; s3, the melt is quantitatively discharged into a foaming forming die through injection forming equipment; s4, performing high-temperature foaming forming on the melt in a foaming forming mold to form a shoe blank; and S5, trimming the shoe blank to obtain a finished shoe. The temperature of each section of the injection molding equipment is controlled, so that the plasticizing condition and viscosity of the melt can be effectively controlled, and the quality of the finally formed finished shoes is improved. The finished shoes obtained by the high-quality production process are breathable, light, waterproof, excellent in shock absorption performance, good in heat insulation performance, wear-resistant, durable, environment-friendly, non-toxic, moisture-proof, odor-resistant, good in breathability, light in foot feeling, attractive in appearance and particularly suitable for being worn outdoors.

Description

Technical Field

[0001] The present application relates to the technical field of one-piece-molded footwear production technology, and in particular to a high-quality production technology for one-piece-molded footwear. Background Art

[0002] EVA one-piece molded shoes are made by foaming the melt formed by melting EVA raw materials in a foaming mold. EVA one-piece molded shoes refer to slippers, sandals and outdoor wading shoes formed by foaming EVA materials.

[0003] During the EVA one-piece foam molding process of shoes, temperature has a great impact on the output and quality of the shoes, especially during the melting process, which can directly affect the physical and mechanical properties and appearance of the final shoe.

[0004] In the related art, in order to facilitate the installation of temperature control equipment, it is generally necessary to set a heating block on the outside of the barrel, and then set an electric heater or heating pipe on the heating block to achieve the temperature control of the barrel temperature. However, the temperatures between different sections of the barrel are easy to affect each other, and it is difficult to accurately control the temperature, which affects the quality of the formed EVA one-piece molded shoes.

[0005] Based on this, it is necessary to propose a high-quality production process for one-piece molded shoes and accurately control the temperature of each section of the injection molding equipment, which has become an important technical problem that needs to be solved urgently. Summary of the Invention

[0006] The present application provides a high-quality production process for one-piece molded shoes, which aims to solve the problem in the prior art that in order to facilitate the installation of temperature control equipment, it is generally necessary to set a heating block on the outside of the barrel, and then set an electric heater or heating pipe on the heating block to achieve the temperature control of the barrel. However, the temperatures between different sections of the barrel are easy to affect each other, making it difficult to accurately control the temperature, thereby affecting the quality of the formed EVA one-piece molded shoes.

[0007] To achieve the above-mentioned purpose, the present application proposes a high-quality production process for one-piece molded shoes, and the production process includes the following steps: S1, EVA finished raw materials are put into injection molding equipment; S2, the temperature of each section of the injection molding equipment is accurately controlled to melt the EVA finished raw materials to form a melt; S3, the injection molding equipment discharges the melt into a foaming molding mold in a quantitative manner; S4, the melt is foamed and molded at high temperature in the foaming molding mold to form a shoe embryo; S5, the shoe embryo is trimmed to obtain a finished shoe.

[0008] In some embodiments, the shoe blank molding method in the above S4 is specifically as follows: during the shoe blank molding process, the temperature in the foaming molding mold is 170°C~185°C, and the pressure in the foaming molding mold is 100MPa~140MPa. The melt is molded at the above temperature and pressure. After keeping the temperature and pressure for 6 minutes, the foaming molding mold is cooled to form the shoe blank.

[0009] In some embodiments, the above-mentioned S5 specifically includes the following steps: S51, trimming the shape of the shoe blank through the shoe last; S52, placing the shoe blank in a constant temperature box, and adjusting the temperature in the constant temperature box to -15℃~10℃; S53, stretching the shoe blank in the constant temperature box so that the size of the shoe blank meets the design requirements to form a finished shoe.

[0010] In some embodiments, the injection molding equipment includes: a feeding section, which is provided with a feeding port; a rotating shaft, which is rotatably arranged in the feeding section, and the outer peripheral surface of the rotating shaft is provided with spiral wings; a compression section, which is arranged at the end of the feeding section; a homogenizing section, which is arranged at the end of the compression section away from the feeding section; a die section, which is arranged at the end of the homogenizing section away from the compression section; and a discharge port, which is arranged in the die section.

[0011] In some embodiments, the compression section, the homogenization section and the die section all include: a barrel, wherein the rotating shaft portion is located inside the barrel; end plates, which are arranged at both ends of the barrel; a heating barrel, which is sleeved on the outside of the end plates, and the heating barrel is connected to the end plates, forming a temperature control space between the heating barrel and the barrel; an oil inlet, which is arranged on the heating barrel and is connected to the temperature control space; and an oil outlet, which is arranged on the heating barrel and is connected to the temperature control space.

[0012] In some embodiments, the compression section, homogenization section and die head section also include: a spiral flow channel, the spiral flow channel is arranged on the inner side of the heating tube, the oil inlet is arranged on the heating tube, and two oil outlets are provided, and the two oil outlets are respectively arranged on the heating tube near the two ends of the heating tube.

[0013] In some embodiments, the compression section, the homogenization section and the die section all further include: a positioning protrusion, which is provided on one end plate; a positioning groove, which is provided on the other end plate, and the positioning protrusion is adapted to the positioning groove.

[0014] In some embodiments, the compression section, the homogenization section and the die section all further include: disturbance grooves, which are arranged at intervals on the outer peripheral surface of the barrel along the direction of the spiral flow channel, and the disturbance grooves include a transition section and a guide section.

[0015] In some embodiments, the compression section, the homogenization section, and the die section all further include: a welding station, and a welding station for connecting the heating cylinder is provided on the end plate.

[0016] In some embodiments, the injection molding device further includes: a feed cone, which is mounted on the feed port via fasteners.

[0017] The technical solution of this application proposes a high-quality production process for one-piece molded shoes. The production process includes the following steps: S1, EVA finished raw materials are put into the injection molding equipment; S2, the temperature of each section of the injection molding equipment is controlled to melt the EVA finished raw materials to form a melt; S3, the injection molding equipment quantitatively discharges the melt into the foaming molding mold; S4, the melt is foamed and molded at high temperature in the foaming molding mold to form a shoe blank; S5, the shoe blank is trimmed to obtain the finished shoe. The application controls the temperature of each section of the injection molding equipment, which can effectively control the plasticization and viscosity of the melt and improve the quality of the finished shoes. The finished shoes obtained by the high-quality production process in this application are breathable, lightweight, waterproof, have excellent shock absorption performance, good thermal insulation performance, wear resistance and durability, environmentally friendly and non-toxic, moisture-proof and odor-resistant, have good breathability, light feel and beautiful appearance, and are especially suitable for outdoor wear. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present application. Those skilled in the art can also derive other drawings based on these drawings without inventive work, among which: Figure 1 A technical roadmap for a high-quality production process for one-piece molded footwear in one embodiment of the present application; Figure 2 This is a schematic diagram of the three-dimensional structure of an injection molding device in one embodiment of the present application; Figure 3 This is a cross-sectional view of an injection molding device in one embodiment of the present application; Figure 4 for Figure 3 A partial enlarged view of part A in the middle; Figure 5 Schematic diagram of the structure of the disturbance tank in one embodiment of the present application.

[0019] In the figure: rotating shaft 1, feeding section 2, compression section 3, homogenizing section 4, die section 5, discharge port 6, connecting hole 8, oil outlet 9, end plate 10, oil inlet 11, bolt 12, feeding cone 13, spiral wing 14, feeding port 15, bearing 16, end cover 17, positioning protrusion 18, heating cylinder 19, barrel 20, spiral flow channel 21, disturbance groove 22, transition section 221, guide section 222, welding table 23, turbulent zone 24. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0021] It should be noted that all directional indications in the embodiments of the present application (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0022] It should also be noted that when an element is referred to as being "fixed on" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or there may be an intermediate element.

[0023] In addition, the descriptions of "first" and "second" in this application are for descriptive purposes only and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in this field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0024] See Figure 1 As shown, the present application proposes a high-quality production process for one-piece molded footwear, the production process comprising the following steps: S1. EVA finished product raw materials are put into the injection molding equipment. The EVA finished product raw materials include EVA resin and related auxiliary materials. EVA resin and related auxiliary materials are put into a high-speed mixer according to a certain ratio, mixed evenly in the high-speed mixer, and then put into the injection molding equipment. S2. Precisely control the temperature of each section of the injection molding equipment to melt the EVA raw material to form a melt. The EVA raw material melting process can be divided into four stages: feeding, compression, homogenization, and discharge. During the EVA raw material melting process, the EVA raw material's aggregate state transition and viscosity are both temperature-dependent. Temperature significantly impacts the yield and quality of the final molded shoe, particularly the plasticization process, which directly affects the shoe's performance and appearance. To achieve a melt, the temperature is preferably maintained at around 60°C during the feeding stage to effectively soften the EVA raw material. During the compression stage, the temperature is preferably maintained at 160-170°C to fully melt the EVA raw material. During the homogenization stage, the temperature is preferably maintained at 185-190°C to further plasticize and homogenize the EVA raw material. During the discharge stage, the temperature is preferably maintained at 178-182°C to ensure smooth melt flow and effectively prevent scorching and decomposition. By controlling the temperature of each section, the plasticization and viscosity of the melt can be effectively controlled, thus improving the quality of the finished shoe. S3, the injection molding equipment discharges the melt into the foaming molding mold in a quantitative manner; S4, the melt is foamed and molded at high temperature in the foaming molding mold to form a shoe embryo; before squeezing a certain amount of melt into the foaming molding mold, a release agent needs to be sprayed into the mold cavity of the foaming molding mold so that the shoe embryo can be smoothly removed from the foaming molding mold; a thermocouple and a temperature measuring probe are provided on the foaming molding mold, and the control center heats the foaming molding mold by controlling the opening of the thermocouple. The control center controls the temperature of the foaming molding mold through the temperature measuring probe to make it reach a preset molding temperature. A button-type pressure sensor is also provided in the foaming molding mold, and the signal of the button-type pressure sensor is transmitted back to the control center. The control center controls the pressure in the foaming molding mold by controlling the injection molding equipment, so that the melt is molded in the foaming molding mold at a preset pressure and temperature. After molding, the foaming molding mold is cooled, and then the mold can be opened to take out the shoe embryo.

[0025] S5. The shoe blanks are trimmed to obtain finished shoes. The finished shoes must undergo inspection, packaging, and boxing before they can be sold to ensure that defective shoes are not released. The finished shoes obtained through the above preparation method are breathable, lightweight, waterproof, have excellent shock absorption and thermal insulation properties, are wear-resistant and durable, are environmentally friendly and non-toxic, are moisture-proof and odor-resistant, have good air permeability, feel light on the feet, and have an attractive appearance, making them particularly suitable for outdoor wear.

[0026] Specifically, the present invention controls the temperature of each section of the injection molding equipment, effectively controlling the plasticization and viscosity of the melt, thereby improving the quality of the finished shoe. The finished shoes produced through the high-quality production process described in this application are breathable, lightweight, waterproof, have excellent shock absorption, good thermal insulation, are wear-resistant and durable, are environmentally friendly and non-toxic, are moisture-proof and odor-resistant, have good air permeability, feel light on the feet, and have a beautiful appearance, making them particularly suitable for outdoor wear.

[0027] In some embodiments, the shoe base molding method in S4 is as follows: During the shoe base molding process, the temperature in the foaming mold is 170°C to 185°C, and the pressure in the foaming mold is 100MPa to 140MPa. The melt is molded at the above temperature and pressure. After maintaining the temperature and pressure for 6 minutes, the foaming mold is cooled to form the shoe base. The foaming mold is provided with a thermocouple and a temperature probe. The control center heats the foaming mold by controlling the opening and closing of the thermocouple. The control center controls the temperature of the foaming mold through the temperature probe to reach a preset molding temperature. The foaming mold is also provided with a button-type pressure sensor. The model of the button-type pressure sensor is transmitted back to the control center. The control center controls the pressure in the foaming mold by controlling the screw extruder. The EVA finished raw material is molded in the foaming mold at the preset pressure and temperature. After molding, the foaming mold is cooled, and then the mold can be opened to remove the shoe base. The foaming mold is also provided with a cooling structure, which is preferably an oil cooling structure.

[0028] In some embodiments, the above S5 specifically includes the following steps: S51. Trim the shape of the shoe using the shoe last. The shoe last is designed based on the foot shape and is the mother of the shoe. The shoe last not only determines the shape and style of the shoe, but also fits the shoe onto the last and trims the shape of the shoe according to the last, ensuring that the shape and style of the shoe meet the design requirements. S52. Place the shoe blank in a constant temperature chamber and adjust the temperature within the chamber to -15°C to 10°C. S53. Stretch the shoe blank in the constant temperature chamber until its dimensions meet the design requirements, thereby forming the finished shoe. The constant temperature chamber provides a constant, cold environment. Stretching the shoe blank in this cold environment ensures the shoe blank meets the design requirements, preventing expansion caused by high temperatures from affecting the dimensions of the finished shoe.

[0029] Reference Figure 2 As shown, in some embodiments, the injection molding apparatus includes: The feed section 2 is provided with a feed port 15. The feed port 15 on the feed section 2 is used to place the evenly mixed EVA finished product raw materials. The feed section 2 is not provided with a dedicated temperature control structure. Under the influence of the temperature control structure of the compression section 3, homogenization section 4 or die section 5, the feed section 2 can be heated to about 60°C, effectively softening the EVA finished product raw materials. The feed section 2 is a conveying section. It needs to generate sufficient thrust to push the material forward. The temperature should not be too high. Therefore, the feed section 2 is not provided with a heating structure. The feed section 2 is separated from the material sections with heating structures, such as the compression section 3, homogenization section 4 and die section 5. This prevents the heat from the compression section 3, homogenization section 4 and die section 5 from being quickly transferred to the feed section 2, so that the temperature of the feed section 2 can be stabilized at about 60°C. If the temperature of the feed section 2 is too high, the EVA finished product raw materials will melt prematurely, and plug flow will not be formed, which can easily lead to decomposition of the EVA resin. It will also cause fluctuations in extrusion pressure and uneven plasticization, affecting the quality of the final product. The feeding section 2 includes a barrel 20 and an end plate 10 located at one end of the barrel 20 . The end plate 10 is welded to the barrel 20 . The other end of the barrel 20 of the feeding section 2 is screwed with an end cover 17 . The feeding port 15 is arranged on the barrel 20 of the feeding section 2 .

[0030] The rotating shaft 1 is rotatably arranged in the feeding section 2, and the outer peripheral surface of the rotating shaft 1 is provided with a spiral wing 14; the rotating shaft 1 is rotatably arranged on the end cover 17 through the bearing 16, and the rotating shaft 1 partially extends out of the end cover 17. The part of the rotating shaft 1 extending out of the end cover 17 is used to connect the driving structure. Since the driving structure of the rotating shaft 1 is a mature existing technology, no specific restriction is made to the driving structure of the rotating shaft 1 in this application. The rotating shaft 1 extends into the compression section 3, the homogenization section 4 and the die section 5, and the spiral wing 14 also extends into the feeding section 2, the compression section 3, the homogenization section 4 and the die section 5. The spiral wing 14 is used to convey, compress and shear the EVA finished raw material. Since the structure of the spiral wing 14 of the injection molding equipment is a mature existing technology, no specific restriction is made to the structure of the spiral wing 14 of the injection molding equipment.

[0031] Compression section 3, compression section 3 is arranged at the end of feed section 2; the compression stage is carried out in compression section 3. Under the pushing action of rotating shaft 1 and spiral wing 14, EVA finished raw material moves from feed section 2 to compression section 3. The temperature in compression section 3 needs to rise. The source of heat in this section is not only the external heating of barrel 20, but also the friction heat of rotating shaft 1 and spiral wing 14 plays a certain role. The action temperature of this stage has exceeded the phase change temperature of EVA finished raw material, so that EVA finished raw material is fully melted.

[0032] Homogenizing section 4, homogenizing section 4 is arranged at one end of compression section 3 away from feeding section 2; the homogenizing stage is carried out in homogenizing section 4, and the temperature of homogenizing section 4 continues to rise. Most of the EVA finished raw material has been plasticized in compression section 3, but a small part of the polymer composition has not yet begun to plasticize. This part of the unplasticized particles requires a higher plasticizing temperature. Therefore, the temperature increase of homogenizing section 4 is to further plasticize and homogenize the EVA finished raw material.

[0033] The die section 5 is arranged at the end of the homogenizing section 4 away from the compression section 3; the discharging stage is carried out in the die section 5, and the die section 5 needs to maintain a certain high temperature. The high temperature can improve the surface brightness of the melt and the surface quality is good, but the temperature of the die section 5 cannot be too high. Excessive temperature will not only cause the surface layer to decompose, but also cause the shoe embryo to be difficult to cool down, making it difficult to shape the shoe embryo, and easy to sag, deform by itself or be flattened and deformed.

[0034] The discharge port 6 is provided at the die head section 5. The discharge port 6 is used to connect to the foaming mold. The one-step foaming mold for shoes is a mature prior art, and the structure of the one-step foaming mold for shoes is not specifically limited here.

[0035] See Figure 2 、 Figure 3 and Figure 4 As shown, in some embodiments, the outer sides of the compression section 3, the homogenization section 4 and the die section 5 are all provided with a heating structure, which is used to increase the temperature of the EVA finished product raw material to a preset temperature. The compression section 3, the homogenization section 4 and the die section 5 all include: The barrel 20, the rotating shaft 1 is partially located in the barrel 20; the end plate 10, the end plate 10 is arranged at both ends of the barrel 20; the end plate 10 is connected to the barrel 20 by welding, the end plate 10 of the barrel 20 of the feeding section 2 is connected to the end plate 10 at one end of the barrel 20 of the compression section 3 to form a connection between the feeding section 2 and the compression section 3, the end plate 10 at the other end of the barrel 20 of the compression section 3 is connected to the end plate 10 at one end of the homogenizing section 4 to form a connection between the compression section 3 and the homogenizing section 4, the end plate 10 at the other end of the barrel 20 of the homogenizing section 4 is connected to the end plate 10 at one end of the die section 5 to form a connection between the homogenizing section 4 and the die section 5, and the other end of the die section 5 is provided with a cone formed integrally with the barrel 20. The connection between the end plates 10 is achieved through bolts 12 and lock nuts. The end plates 10 are each provided with a connection hole 8 containing an internal thread. The bolts 12 pass through the connection holes 8 of the two end plates 10 and are locked together by the lock nuts, thereby achieving the connection between the two end plates 10. The heating cylinder 19 is mounted on the outside of the end plates 10. The heating cylinder 19 is connected to the end plates 10, forming a temperature-controlled space between the heating cylinder 19 and the barrel 20. The heating cylinder 19 is welded to the end plates 10, thereby forming a temperature-controlled space between the heating cylinder 19 and the barrel 20. The oil inlet 11 is provided on the heating cylinder 19 and is connected to the temperature-controlled space. The oil outlet 9 is provided on the heating cylinder 19 and is connected to the temperature-controlled space. The temperature-controlled oil enters the temperature-controlled space from the oil inlet 11 and is discharged from the temperature-controlled space from the oil outlet 9, achieving heat exchange with the barrel 20, and controlling the temperature of the internal melt through the barrel 20.

[0036] In this embodiment, a high-temperature resistant sealing ring, such as a fluororubber sealing ring, is provided between the two connected end plates 10, and a high-temperature resistant sealing ring is also provided between the heating tube 19 and the end plate 10 to prevent leakage of the melt and temperature control oil.

[0037] Among them, the barrel 20 is provided with a temperature measuring hole for inserting a thermocouple, which is used to measure the temperature of the barrel 20 or the melt therein. After the temperature control oil is discharged from the oil outlet 9, it is heated to a preset temperature by the heater, and then flows into the temperature control space from the oil inlet 11. The external circulation of the temperature control oil and the high-precision temperature control system are mature existing technologies and will not be repeated here.

[0038] See Figure 2 、 Figure 3 and Figure 4As shown, in some embodiments, the compression section 3, the homogenization section 4, and the die section 5 all further include: a spiral flow channel 21, which is arranged on the inner side of the heating cylinder 19. The design of the spiral flow channel 21 can reduce the residence time of the temperature control oil in the temperature control space, and prevent the temperature control oil from staying in the temperature control space for a long time, resulting in a large temperature change, and failing to effectively control the temperature of the melt inside the barrel 20. The oil inlet 11 is provided on the heating cylinder 19, and two oil outlets 9 are provided. The two oil outlets 9 are respectively provided on the heating cylinder 19 near both ends of the heating cylinder 19. One oil outlet 9 is installed on the heating cylinder 19 near one end of the heating cylinder 19, and the other oil outlet 9 is installed on the heating cylinder 19 near the other end of the heating cylinder 19. The structural arrangement in which the oil inlet 11 is provided in the middle and the two oil outlets 9 are respectively provided at both ends can effectively reduce the residence time of the temperature control oil in the temperature control space, and prevent the temperature control oil from staying in the temperature control space for a long time, resulting in a large temperature change, and failing to effectively control the temperature of the melt inside the barrel 20. The oil inlet 11 and the oil outlet 9 are both connected to the spiral flow channel 21 , and a sealing gasket and a high-temperature resistant sealing ring are provided between the oil inlet 11 and the oil outlet 9 and the heating tube 19 .

[0039] See Figure 2 、 Figure 3 and Figure 4 As shown, in some embodiments, the compression section 3, the homogenization section 4, and the die section 5 all further include: a positioning protrusion 18, which is provided on one end plate 10; and a positioning groove, which is provided on the other end plate 10, with the positioning protrusion 18 adapted to fit within the positioning groove. When the two end plates 10 are connected, the positioning protrusion 18 is inserted into the positioning groove to achieve preliminary positioning and connection of the adjacent end plates 10, reducing the difficulty of subsequent connection using the bolts 12 and lock nuts.

[0040] See Figure 2 、 Figure 3 、 Figure 4 and Figure 5 As shown, in some embodiments, the compression section 3, the homogenization section 4, and the die section 5 all further include: disturbance grooves 22, which are arranged at intervals on the outer peripheral surface of the barrel 20 along the direction of the spiral flow channel 21. The disturbance grooves 22 include a transition section 221 and a guide section 222. During the flow of the temperature-control oil in the spiral flow channel 21, the disturbance grooves 22 are used to disrupt the flow direction of the temperature-control oil, so that multiple turbulent flow zones 24 are generated in the spiral flow channel 21, which is conducive to the mixing of the temperature-control oil and avoids the temperature difference between the temperature-control oil on the side close to the barrel 20 and the temperature-control oil on the side away from the barrel 20 during the flow process. The above-mentioned mixing means is conducive to eliminating the above-mentioned temperature difference, facilitating more effective control of the temperature of each section of the barrel 20.

[0041] Among them, the temperature-controlled oil on the side close to the barrel 20 flows into the guide section 222 under the guidance of the transition section 221, and the flow direction of the temperature-controlled oil is changed under the action of the guide section 222, thereby forming an angle with the flow direction of the temperature-controlled oil on the side away from the barrel 20. The above-mentioned flow angle causes the temperature-controlled oil on the side away from the barrel 20 to collide with the temperature-controlled oil on the side close to the barrel 20, forming a turbulent zone 24, which is conducive to the mixing of the temperature-controlled oil.

[0042] In some embodiments, the compression section 3, the homogenization section 4, and the die section 5 each further include a welding platform 23. The end plate 10 is provided with a welding platform 23 for connecting to the heating cartridge 19. The welding platform 23 is used to support the heating cartridge 19, which is welded to the welding platform 23. A high-temperature resistant sealing ring is provided between the heating cartridge 19 and the welding platform 23.

[0043] In some embodiments, the injection molding apparatus further includes a feed cone 13, which is mounted to a feed port 15 via fasteners. Feed cone 13 is mounted to feed port 15 via bolts 12 and lock nuts. The connection between feed cone 13 and feed port 15 is similar to the connection between end plate 10 and end plate 10, and will not be repeated here.

[0044] The above description is only a partial or preferred embodiment of the present application. Neither the text nor the drawings can limit the scope of protection of the present application. Any equivalent structural transformation made by using the contents of the present application specification and drawings under the overall concept of the present application, or direct / indirect application in other related technical fields, is included in the scope of protection of the present application.

Claims

1. A high-quality production process for one-piece footwear, characterized in that: The production process comprises the following steps: S1. EVA finished product raw materials are put into the injection molding equipment; S2. Accurately controlling the temperature of each section of the injection molding equipment to melt the EVA finished product raw material to form a melt; S3, the injection molding equipment quantitatively discharges the melt into the foaming molding mold; S4, the melt is foamed and molded at high temperature in the foaming mold to form a shoe base; S5. Trim the shoe blank to obtain a finished shoe.

2. The high-quality production process for integrally molded footwear according to claim 1, characterized in that: The molding method of the shoe embryo described in the above S4 is specifically as follows: during the molding process of the shoe embryo, the temperature in the foaming molding mold is 170°C~185°C, and the pressure in the foaming molding mold is 100MPa~140MPa. The melt is molded at the above temperature and pressure. After keeping the temperature and pressure for 6 minutes, the foaming molding mold is cooled to form the shoe embryo.

3. The high-quality production process for integrally molded footwear according to claim 1, characterized in that: The above S5 specifically includes the following steps: S51, trimming the shape of the shoe embryo using a shoe last; S52, placing the shoe embryo into a constant temperature box, and adjusting the temperature in the constant temperature box to -15°C to 10°C; S53, stretching the shoe blank in a constant temperature box so that the size of the shoe blank meets the design requirements, so as to form the finished shoe.

4. The high-quality production process for integrally molded footwear according to any one of claims 1 to 3, characterized in that: The injection molding equipment includes: A feeding section, wherein the feeding section is provided with a feeding port; A rotating shaft, the rotating shaft is rotatably arranged in the feeding section, and the outer peripheral surface of the rotating shaft is provided with a spiral wing; A compression section, the compression section being arranged at the end of the feeding section; a homogenizing section, the homogenizing section being arranged at an end of the compression section away from the feeding section; a die section, the die section being arranged at one end of the homogenizing section away from the compression section; A discharge port is provided at the die head section.

5. The high-quality production process for integrally molded footwear according to claim 4, characterized in that: The compression section, the homogenization section and the die section all include: a barrel, wherein the rotating shaft is partially located in the barrel; End plates, the end plates being arranged at both ends of the barrel; A heating cylinder, which is sleeved on the outside of the end plate and connected to the end plate, with a temperature control space formed between the heating cylinder and the barrel; an oil inlet, the oil inlet being provided on the heating cylinder and communicating with the temperature control space; An oil outlet is provided on the heating cylinder and is connected to the temperature control space.

6. The high-quality production process for integrally molded footwear according to claim 5, characterized in that: The compression section, the homogenization section and the die section all further include: The spiral flow channel is arranged on the inner side of the heating tube, the oil inlet is arranged on the heating tube, and two oil outlets are provided. The two oil outlets are respectively arranged on the heating tube near the two ends of the heating tube.

7. The high-quality production process for integrally molded footwear according to claim 5, characterized in that: The compression section, the homogenization section and the die section all further include: a positioning protrusion, the positioning protrusion being provided on one of the end plates; A positioning groove is provided on the other end plate, and the positioning protrusion is adapted to the positioning groove.

8. The high-quality production process for integrally molded footwear according to claim 5, characterized in that: The compression section, the homogenization section and the die section all further include: The disturbance grooves are arranged at intervals on the outer peripheral surface of the barrel along the direction of the spiral flow channel, and the disturbance grooves include a transition section and a guide section.

9. The high-quality production process for integrally molded footwear according to claim 5, characterized in that: The compression section, the homogenization section and the die section all further include: A welding platform is provided on the end plate for connecting the heating cylinder.

10. The high-quality production process for integrally molded footwear according to claim 4, characterized in that: The injection molding equipment also includes: A feed cone is mounted on the feed port via fasteners.

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