Injection molding apparatus for shoe manufacturing

Abstract

The utility model discloses an injection molding equipment for shoemaking relates to shoemaking processing technical field, including injection control box, the top of injection control box is provided with the blanking mechanism, the back of injection control box is provided with the drive protection shell, the front of injection control box is provided with the mould unit, the bottom fixed mounting of injection control box has organism, the blanking mechanism includes the conical heating box, the bottom fixed connection of conical heating box has the extension pipe through to the inside cavity of injection control box. The utility model discloses through the mutual cooperation between conical heating box, blanking pipe, screw rod, heating power supply, conical heating plate, material pipe, thereby make the input raw material can accurate input to the amount in material pipe, and the blanking speed, can also preheat to the shoemaking raw material before blanking simultaneously, thereby reduces the heating time in material pipe, improves the heating efficiency.

Description

Technical Field

[0001] This utility model relates to the field of shoe manufacturing technology, specifically to an injection molding device for shoe manufacturing. Background Technology

[0002] The materials used for shoe soles include polyethylene, EVA (polyvinyl chloride), modified polyvinyl chloride, and SBS thermoplastic polyurethane. During processing, plastic granules or blocks are placed in a heated barrel and heated to melt and plasticize them. The molten plastic material needs to maintain a certain fluidity and temperature to smoothly enter the mold during injection. Under the high pressure of the injection molding machine, the molten plastic material is rapidly injected into a closed mold through a screw or plunger. The mold usually has a cavity corresponding to the shape of the insole to ensure that the molded insole has the required shape and size. Finally, after the insole has solidified, the mold is opened and the insole is removed from the mold for subsequent processing.

[0003] Chinese patent document CN119261120B discloses an injection molding equipment for safety shoe insoles, including a machine body. A mold unit and a protective frame are mounted on the machine body. An injection end fixed to one side of the mold unit is located inside the protective frame. A laterally extending material tube is fixed to the outside of the injection end. A feeding tube communicating with the inside of the material tube is fixed to the upper end of the material tube. A pushing unit for pushing molten plastic is installed inside the material tube. A heating sleeve for heating is covered on the outside of the material tube. A driving part for pushing motion is provided at the end of the material tube. This invention uses a spiral pusher to laterally push the molten plastic. The molten plastic moves back through the gap between the spiral pusher and the material tube, resulting in relatively uniform heating of the molten plastic. The spiral pusher and the negative pressure of the conical cavity work together to ensure that the conical cavity is filled. The conical end moves outward, contacting more molten plastic and avoiding voids inside the conical cavity. The following problems exist with the existing technology:

[0004] The aforementioned literature mainly relies on the direct connection between the feeding pipe and the material pipe for material feeding. PVC or EVA, the raw material particles for shoe soles, pass directly through the feeding pipe for heating in the material pipe. This not only makes it impossible to accurately control the amount fed in, but also increases the working pressure of the heating sleeve outside the material pipe, requiring a longer heating time and affecting the injection molding efficiency of the shoe sole. Furthermore, although the aforementioned literature can control the reciprocating movement of the spiral pusher, the drive unit uses spring reset and the support shaft and spiral plate to achieve the rotational reciprocating movement. This results in significant wear between the support shaft and the spiral plate. At the same time, the spring needs to be continuously compressed and released repeatedly, resulting in a short service life for the overall reciprocating drive unit and requiring frequent replacement of parts. Utility Model Content

[0005] This invention provides an injection molding device for shoemaking to solve the problems mentioned in the background art.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0007] An injection molding machine for shoemaking includes an injection control box. A feeding mechanism is located at the top of the injection control box. A drive protective shell is located at the rear of the injection control box. A mold unit is located at the front of the injection control box. An organic body is fixedly installed at the bottom of the injection control box. The feeding mechanism includes a conical heating box. An extension tube penetrating the inner cavity of the injection control box is fixedly connected to the bottom of the conical heating box. A feeding tube penetrating the inner cavity of the conical heating box is fixedly connected to the center of the top of the conical heating box. A conical funnel is fixedly connected to the top of the feeding tube. An L-shaped bracket is fixedly installed on the left side of the conical funnel. A servo motor is fixedly installed at the bottom of the horizontal part of the L-shaped bracket. Two spiral rods are fixedly installed on the output shaft of the servo motor. Spiral blades are provided on the outer walls of both spiral rods, and the two sets of spiral blades are located in the inner cavities of the feeding tube and the extension tube, respectively, and are in contact with their inner walls.

[0008] A further improvement of this utility model is that a heating power supply is fixedly installed at the eccentric top of the conical heating box, a conical heating plate is fixedly installed on the inner wall of the conical heating box, and the power supply output terminal of the heating power supply is electrically connected to the power supply input terminal of the conical heating plate.

[0009] A further improvement of the present invention is that a fixing plate is fixedly installed between the left and right sides of the inner wall of the injection control box, a material tube is fixedly installed on the front side of the fixing plate, and the bottom end of the bottom extension tube of the conical heating box is fixedly connected to the rear top of the material tube and passes through its inner cavity.

[0010] A further improvement of this utility model is that: a heating sleeve is fitted on the outer wall of the material tube, a push shaft is provided in the inner cavity of the material tube, a partition is fixedly installed on the last side of the outer wall of the push shaft, and a spiral push plate is fixedly installed on the outer wall of the push shaft, with the outer wall of the spiral push plate fitting against the inner ring of the material tube.

[0011] A further improvement of this utility model is that: a servo motor two is fixedly installed on the top of the inner wall of the drive protective shell; a turntable is fixedly installed on the output shaft of the servo motor two; a connecting push plate is movably installed at the eccentric bottom of the turntable; a U-shaped plate is movably installed on the bottom side of the connecting push plate away from the turntable; a servo motor three is fixedly installed between the two horizontal points of the U-shaped plate; a rotating rod is fixedly installed on the output shaft of the servo motor three; and the front end of the rotating rod penetrates into the inner cavity of the material tube and is fixedly connected to the center of the rear end of the push shaft.

[0012] A further improvement of this utility model is that: a hanging plate is fixedly installed at the bottom of the U-shaped plate, and two sliding rods are fixedly installed between the rear side of the inner wall of the drive protective shell and the rear side of the fixed plate, and the hanging plate is slidably connected to the two sliding rods.

[0013] A further improvement of this utility model is that: a conical cavity is provided at the rear end of the mold unit, the conical cavity is in communication with the inner cavity of the material tube, a feeding box is fixedly installed at the front end of the push shaft, the outer wall of the feeding box is in contact with the inner ring of the material tube, a plurality of feeding holes penetrating its inner cavity are provided in a circular array on the rear side of the feeding box, a conical head is fixedly connected to the front end of the feeding box, the conical head is engaged with the conical cavity, the conical head is provided with an output hole penetrating into the inner cavity of the feeding box, and a one-way valve is fixedly installed in the inner cavity of the output hole.

[0014] Due to the adoption of the above technical solution, the technological progress achieved by this utility model compared to the prior art is as follows:

[0015] This utility model provides an injection molding equipment for shoemaking. Through the cooperation of a conical heating box, a feeding tube, a spiral rod, a heating power supply, a conical heating plate, and a feeding tube, the amount of raw material fed into the feeding tube can be accurately controlled, as well as the feeding speed. At the same time, the shoemaking raw material can be preheated before feeding, thereby reducing the heating time in the feeding tube and improving heating efficiency.

[0016] This utility model provides an injection molding device for shoemaking. Through the cooperation of a turntable, a connecting push plate, a U-shaped plate, and a servo motor, the push shaft can reciprocate back and forth while rotating, thus achieving normal injection function. This method is more stable than spring reset. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a schematic cross-sectional view of the material tube structure of this utility model;

[0019] Figure 3 This is a cross-sectional schematic diagram of the feeding mechanism of this utility model.

[0020] Figure 4 This is a schematic diagram of the internal structure of the drive protective shell of this utility model;

[0021] Figure 5 This is a schematic diagram showing the separation state of the conical head and the conical cavity in the structure of this utility model.

[0022] In the diagram: 1. Injection control box; 11. Fixing plate; 12. Material tube; 13. Heating jacket; 14. Push shaft; 141. Spiral push plate; 142. Rotating rod; 143. Feed box; 144. Feed hole; 145. Conical head; 146. One-way valve; 15. Partition plate; 2. Unloading mechanism; 21. Conical heating box; 22. Unloading tube; 23. Conical funnel; 24. L-shaped bracket; 25. Servo motor one; 26. Spiral rod; 27. Heating power supply; 28. Conical heating plate; 3. Drive protective shell; 31. Servo motor two; 32. Turntable; 33. Connecting push plate; 34. U-shaped plate; 35. Servo motor three; 351. Hanging plate; 36. Slide rod; 4. Mold unit; 41. Conical cavity; 5. Machine body. Detailed Implementation

[0023] To make the technical means, creative features, objectives and effects of this utility model easier to understand

[0024] Understood. The present invention will now be further described in conjunction with specific implementation methods.

[0025] like Figure 1 , Figure 2 , Figure 3As shown, this utility model provides an injection molding equipment for shoemaking, including an injection control box 1. A feeding mechanism 2 is provided on the top of the injection control box 1. A drive protective shell 3 is provided on the rear side of the injection control box 1. A mold unit 4 is provided on the front side of the injection control box 1. An organic body 5 is fixedly installed at the bottom of the injection control box 1. The feeding mechanism 2 includes a conical heating box 21. An extension pipe penetrating into the inner cavity of the injection control box 1 is fixedly connected to the bottom of the conical heating box 21. A feeding pipe 22 penetrating its inner cavity is fixedly connected to the center of the top of the conical heating box 21. A conical funnel 23 is fixedly connected to the top of the feeding pipe 22. An L-shaped bracket 24 is fixedly installed on the left side of the conical funnel 23. A servo motor 25 is fixedly installed at the bottom of the horizontal position of the L-shaped bracket 24. Two spiral rods 26 are fixedly installed on the output shaft of the servo motor 25. Spiral blades are provided on the outer walls of both spiral rods 26, and the two sets of spiral blades are respectively positioned... The inner cavity of the feeding pipe 22 and the extension pipe is fitted with their inner walls. Several stirring rollers are fixedly installed in the inner cavity of the conical heating box 21, with the output shaft of the servo motor 25 located therein. A heating power supply 27 is fixedly installed at the eccentric top of the conical heating box 21. A conical heating plate 28 is fixedly installed on the inner wall of the conical heating box 21. The power output terminal of the heating power supply 27 is electrically connected to the power input terminal of the conical heating plate 28. The injection control box 1 is fixed at the rear between the left and right sides of its inner wall. A fixing plate 11 is installed, and a material tube 12 is fixedly installed on the front side of the fixing plate 11. The bottom end of the bottom extension tube of the conical heating box 21 is fixedly connected to the rear top side of the material tube 12 and passes through its inner cavity. A heating sleeve 13 is sleeved on the outer wall of the material tube 12. A push shaft 14 is provided in the inner cavity of the material tube 12. A partition 15 is fixedly installed on the rear side of the outer wall of the push shaft 14. A spiral push plate 141 is fixedly installed on the outer wall of the push shaft 14. The outer wall of the spiral push plate 141 is in contact with the inner ring of the material tube 12.

[0026] In use, the raw materials for shoemaking are poured into the conical funnel 23, and simultaneously the servo motor 25 mounted at the bottom of the horizontal position of the L-shaped bracket 24 is activated. This drives the two spiral rods 26 to rotate in the feeding pipe 22 and the extension tube at the bottom of the conical heating box 21, respectively. The contact between the outer wall of the spiral rods 26 and the inner ring of the feeding pipe 22 and the extension tube allows the feeding speed of the granular raw materials to be adjusted according to the rotation speed of the spiral rods 26. Simultaneously, as the granular raw materials pass through the feeding pipe 22, they are dispersed by several stirring rollers on the outer wall of the two spiral rods 26, thus allowing the granules to separate. The particles disperse and come into contact with the conical heating plate 28 inside the conical heating plate 28, thereby controlling the conical heating plate 28 to heat up by starting the heating power supply 27, preheating the particles inside the conical heating plate 28, and then continuing to be conveyed downward through the spiral rod 26 in the bottom extension tube of the conical heating box 21, avoiding excessive heating time for the injection molding machine in a single cycle. After the particles fall into the inner cavity of the feed tube 12, the rotation of the push shaft 14 can drive the spiral push plate 141 to rotate. With the sliding connection between the partition plate 15 and the inner wall of the feed tube 12, the preheated raw material is conveyed forward through the feed tube 12 and heated and melted by the heating jacket 13.

[0027] like Figure 4 As shown, a servo motor 31 is fixedly installed on the top of the inner wall of the drive protective housing 3. A turntable 32 is fixedly installed on the output shaft of the servo motor 31. A connecting push plate 33 is movably installed at the bottom eccentric part of the turntable 32. A U-shaped plate 34 is movably installed on the bottom side of the connecting push plate 33 away from the turntable 32. A servo motor 35 is fixedly installed between the two horizontal parts of the U-shaped plate 34. A rotating rod 142 is fixedly installed on the output shaft of the servo motor 35. The front end of the rotating rod 142 passes through the inner cavity of the material tube 12 and is fixedly connected to the rear center of the push shaft 14. A hanging plate 351 is fixedly installed at the bottom of the U-shaped plate 34. Two sliding rods 36 are fixedly installed between the rear side of the inner wall of the drive protective housing 3 and the rear side of the fixed plate 11. The hanging plate 351 is slidably connected to the two sliding rods 36.

[0028] The push shaft 14 is mainly rotated by the output shaft of servo motor 35 driving the rotating rod 142 to rotate. During rotation, servo motor 2 31 can be started simultaneously to drive the turntable 32 to rotate. Then, the connecting push plate 33, which is movably installed at the bottom of the turntable 32, pulls the U-shaped plate 34 to move backward. After circling once, the connecting push plate 33 is pushed forward. This allows the U-shaped plate 34 to reciprocate back and forth stably by means of the sliding connection limit between the hanging plate 351 and the slide rod 36. This drives the push shaft 14, which is controlled by servo motor 35, to reciprocate back and forth in the inner cavity of the material tube 12, achieving the injection effect. Compared with the reciprocating structure design of springs, this design is more stable and reliable and less prone to wear.

[0029] like Figure 5As shown, a conical cavity 41 is provided at the rear end of the mold unit 4. The conical cavity 41 is connected to the inner cavity of the material tube 12. A feeding box 143 is fixedly installed at the front end of the push shaft 14. The outer wall of the feeding box 143 is in contact with the inner ring of the material tube 12. Several feeding holes 144 are provided in a ring array on the rear side of the feeding box 143, which are connected to its inner cavity. A conical head 145 is fixedly connected to the front end of the feeding box 143. The conical head 145 is engaged with the conical cavity 41. The conical head 145 is provided with an output hole that is connected to the inner cavity of the feeding box 143. A one-way valve 146 is fixedly installed in the inner cavity of the output hole.

[0030] The molten material is injected into the inner cavity of the feeding box 143 through the feeding hole 144 as the feeding shaft 14 drives the feeding box 143 to move back and forth. It can also be gradually injected into the conical cavity 41 through the one-way valve 146 in the output hole of the conical head 145. When the feeding box 143 is pressed forward, the molten material in the conical cavity 41 is injected into the mold groove of the mold unit 4 through the hole to realize the forming of the shoe sole.

[0031] The working principle of the injection molding equipment used in shoemaking will be explained in detail below.

[0032] like Figure 1-5As shown, during use, the raw materials for shoemaking are poured into the conical funnel 23, and simultaneously the servo motor 25 mounted at the bottom of the L-shaped bracket 24 is activated. This drives two spiral rods 26 to rotate within the feeding pipe 22 and the extension tube at the bottom of the conical heating box 21, respectively. The outer wall of the spiral rods 26 adheres to the inner ring of the feeding pipe 22 and the extension tube, allowing the feeding speed of the granular raw materials to be adjusted according to the rotation speed of the spiral rods 26. Simultaneously, as the granular raw materials pass through the feeding pipe 22, they are dispersed by several stirring rollers on the outer wall of the two spiral rods 26, allowing the particles to disperse and contact the conical heating plate 28 inside the conical heating plate 28. The heating power supply 27 then controls the conical heating plate 28 to heat up, preheating the particles inside the conical heating plate 28. The particles are then further conveyed downwards through the spiral rods 26 in the extension tube at the bottom of the conical heating box 21, avoiding... If the single heating time of the injection molding machine is too long, after the granules fall into the inner cavity of the feed tube 12, the rotation of the push shaft 14 can drive the spiral push plate 141 to rotate. With the sliding connection between the partition plate 15 and the inner wall of the feed tube 12, the preheated raw material is conveyed forward through the feed tube 12 and heated and melted by the heating jacket 13. The push shaft 14 is mainly rotated by the output shaft of the servo motor 35 driving the rotating rod 142 to rotate. When rotating, the servo motor 2 31 can be started simultaneously to drive the turntable 32 to rotate. With the help of the connecting push plate 33 movably installed at the bottom of the turntable 32, the U-shaped plate 34 is pulled backward. After circling once, the connecting push plate 33 is pushed forward. Thus, the U-shaped plate 34 can be stably reciprocated back and forth by the sliding connection between the hanging plate 351 and the slide rod 36. This drives the push shaft 14, which is controlled by the servo motor 35, to reciprocate back and forth in the inner cavity of the feed tube 12, so as to achieve the injection effect.

[0033] The present invention has been described in detail above. However, modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, any modifications or improvements that do not depart from the spirit of the present invention are within the protection scope of the present invention.

Claims

1. An injection molding device for shoemaking, comprising an injection control box (1), characterized in that: The top of the injection control box (1) is provided with a feeding mechanism (2), the rear side of the injection control box (1) is provided with a drive protective shell (3), the front side of the injection control box (1) is provided with a mold unit (4), the bottom of the injection control box (1) is fixedly installed with an organic body (5), the feeding mechanism (2) includes a conical heating box (21), the bottom of the conical heating box (21) is fixedly connected with an extension tube that penetrates into the inner cavity of the injection control box (1), and the top center of the conical heating box (21) is fixedly connected with a penetrating tube. The feed tube (22) is connected to the inner cavity of the feed tube (22). A conical funnel (23) is fixedly connected to the top of the feed tube (22). An L-shaped bracket (24) is fixedly installed on the left side of the conical funnel (23). A servo motor (25) is fixedly installed at the bottom of the horizontal part of the L-shaped bracket (24). Two spiral rods (26) are fixedly installed on the output shaft of the servo motor (25). Spiral blades are provided on the outer wall of the two spiral rods (26). The two sets of spiral blades are located in the inner cavity of the feed tube (22) and the extension tube respectively and are in contact with their inner walls.

2. The injection molding equipment for shoemaking according to claim 1, characterized in that: A heating power supply (27) is fixedly installed at the eccentric top of the conical heating box (21), and a conical heating plate (28) is fixedly installed on the inner wall of the conical heating box (21). The power supply output terminal of the heating power supply (27) is electrically connected to the power supply input terminal of the conical heating plate (28).

3. The injection molding equipment for shoemaking according to claim 1, characterized in that: A fixing plate (11) is fixedly installed between the left and right sides of the inner wall of the injection control box (1). A material pipe (12) is fixedly installed on the front side of the fixing plate (11). The bottom end of the bottom extension pipe of the conical heating box (21) is fixedly connected to the top rear side of the material pipe (12) and passes through its inner cavity.

4. The injection molding equipment for shoemaking according to claim 3, characterized in that: The outer wall of the material tube (12) is fitted with a heating sleeve (13), the inner cavity of the material tube (12) is provided with a push shaft (14), the outer wall of the push shaft (14) is fixedly installed with a partition plate (15), the outer wall of the push shaft (14) is fixedly installed with a spiral push plate (141), and the outer wall of the spiral push plate (141) is in contact with the inner ring of the material tube (12).

5. The injection molding equipment for shoemaking according to claim 3, characterized in that: Servo motor 2 (31) is fixedly installed on the top of the inner wall of the drive protective shell (3). A turntable (32) is fixedly installed on the output shaft of the servo motor 2 (31). A connecting push plate (33) is movably installed at the bottom eccentric part of the turntable (32). A U-shaped plate (34) is movably installed on the bottom side of the connecting push plate (33) away from the turntable (32). A servo motor 3 (35) is fixedly installed between the two horizontal parts of the U-shaped plate (34). A rotating rod (142) is fixedly installed on the output shaft of the servo motor 3 (35). The front end of the rotating rod (142) penetrates into the inner cavity of the material tube (12) and is fixedly connected to the rear center of the push shaft (14).

6. The injection molding equipment for shoemaking according to claim 5, characterized in that: A hanging plate (351) is fixedly installed at the bottom of the U-shaped plate (34). Two sliding rods (36) are fixedly installed between the rear side of the inner wall of the drive protective shell (3) and the rear side of the fixed plate (11). The hanging plate (351) is slidably connected to the two sliding rods (36).

7. The injection molding equipment for shoemaking according to claim 4, characterized in that: The mold unit (4) has a conical cavity (41) at its rear end. The conical cavity (41) is connected to the inner cavity of the material tube (12). The front end of the push shaft (14) is fixedly installed with a feeding box (143). The outer wall of the feeding box (143) is in contact with the inner ring of the material tube (12). The rear side of the feeding box (143) has a ring array of feeding holes (144) that penetrate its inner cavity. The front end of the feeding box (143) is fixedly connected with a conical head (145). The conical head (145) is engaged with the conical cavity (41). The conical head (145) has an output hole that penetrates to the inner cavity of the feeding box (143). A one-way valve (146) is fixedly installed in the inner cavity of the output hole.

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