A toothbrush handle injection molding device for recycling biomass plastic waste.

Abstract

This invention relates to the field of injection molding technology, specifically to an injection molding device for toothbrush handles used in the recycling of biomass plastic waste. The device includes a main body, an upper mold, and a lower mold. The lower mold includes a ring mold, with a second lower mold and a third lower mold respectively disposed on the outer side of the ring mold. This invention allows for two injection molding processes in a single operation, enabling toothbrushes requiring secondary injection molding to be completed in one device, improving injection molding efficiency and saving time. After injection molding, the finished product can be transferred to the first and second lower molds for subsequent injection molding, allowing the toothbrush handle to be unloaded without interrupting the injection process, thus ensuring injection molding efficiency. Furthermore, the ring mold provides a limiting position for the unloaded toothbrush handle, facilitating mechanical handling and making the device highly compatible with mechanical unloading systems.

Description

Technical Field

[0001] This invention relates to the field of injection molding technology, specifically to an injection molding device for toothbrush handles used in the recycling of biomass plastic waste. Background Technology

[0002] A toothbrush is a cleaning product with a handle. It is used to apply toothpaste to the brush and then repeatedly brush all parts of the teeth to maintain oral hygiene. The toothbrush handle is now an essential part of the toothbrush, and it is usually injection molded by an injection molding machine.

[0003] A toothbrush injection molding device disclosed in patent announcement number CN214056305U includes a main body with a groove at its upper end and a slider sliding within the groove. A lower mold is located within the main body, corresponding to the upper mold. Fixed screw holes are provided on both sides of the lower mold. An extrusion plate is movable within the lower mold, and a compression spring is fixed to the bottom of the extrusion plate. The bottom of the compression spring passes through a movable plate and is fixedly connected to a support plate. This toothbrush injection molding device utilizes a motor fixed at the bottom of the main body, which drives a transmission wheel connected to a belt to rotate via a motor wheel connected to the top. The transmission wheel then drives a movable plate connected to a screw at the top to move, which in turn moves the lower mold fixed at the top. This causes the support plate connected to the bottom of the movable plate to apply pressure to the compression spring, causing the compression spring to push the extrusion plate and remove the molded brush handle, thereby improving the efficiency of removing the molded brush handle. Currently, toothbrushes generally require secondary injection molding, which can form a non-slip soft coating on the toothbrush handle, making it easier to use. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention proposes a toothbrush handle injection molding device for recycling biomass plastic waste. This device allows for secondary injection molding, and the material feeding process does not affect the injection molding process or the injection molding efficiency of the device.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a toothbrush handle injection molding device for recycling biomass plastic waste, comprising an injection molding device body, an upper mold, and a lower mold. The lower mold includes a ring mold, and a lower mold first and a lower mold second are respectively provided on the outer side of the ring mold. The lower mold first and the lower mold second are fixedly connected to the injection molding device body. A brush handle injection cavity is formed on the upper surface of the lower mold first and the lower mold second, and a brush head injection cavity is formed on the upper surface of the ring mold. The brush handle injection cavity and the brush head injection cavity can form a toothbrush injection cavity. The upper mold includes an upper mold first and an upper mold second. When the upper mold first and the upper mold second move down onto the lower mold first and the lower mold second, the upper mold and the lower mold can be closed. A support plate is fixedly connected to the inner wall of the injection molding device body, and a driving mechanism is provided above the support plate.

[0006] Preferably, the driving mechanism includes a motor fixedly connected to the support plate, and a rotating shaft fixedly connected to the driving end of the motor. A notched wheel is fixedly sleeved on the outer wall of the rotating shaft, and a notched gear is fixedly connected to one end of the rotating shaft. A torque rod is fixedly connected to the lower surface of the ring mold, and one end of the torque rod passes through the injection molding equipment body and the support plate and extends into the injection molding equipment body. Inner sleeve one and inner sleeve two are slidably sleeved on the outer wall of the torque rod. Inner sleeve one is rotatably connected to the injection molding equipment body, and inner sleeve two is rotatably connected to the support plate. A full gear is fixedly sleeved on the outer wall of inner sleeve two, and the full gear is located on the side of the notched gear. A top plate is fixedly sleeved on the outer wall of the torque rod, and the top plate is located above the notched wheel.

[0007] Preferably, the lower surface of the top plate is provided with a plurality of limiting holes, and a limiting shaft is provided in the limiting holes, one end of which is fixedly connected to the support plate.

[0008] Preferably, both the upper end of the limiting shaft and the lower end of the limiting hole are chamfered.

[0009] Preferably, the lower end of the rectangular rod is fixedly connected to a base plate, and a support spring is provided below the base plate, and the support spring is fixedly connected to the inner wall of the injection molding equipment body.

[0010] Preferably, the upper end of the support spring is fixedly connected to a second base plate, and the second base plate is located below the first base plate. The lower surface of the first base plate has a slot, and a ball is provided in the slot. One side wall of the ball contacts the second base plate.

[0011] Preferably, a limiting rod is fixedly connected to the inner wall of the main body of the injection molding equipment, and one end of the limiting rod passes through the second base plate, and the limiting rod is slidably connected to the second base plate.

[0012] Compared with the prior art, the present invention has the following beneficial effects: 1. This invention allows for the completion of two injection molding processes in a single operation when molding toothbrushes. This enables toothbrushes requiring secondary injection molding to be manufactured in a single device, improving injection molding efficiency and saving time. Furthermore, the finished product can be transferred to one side of the lower mold (first and second molds) for subsequent injection molding, allowing the toothbrush handle to be unloaded without interrupting the injection process, thus ensuring injection molding efficiency. Additionally, the toothbrush handle to be unloaded is fixed in position by a ring mold, facilitating handling by mechanical equipment. This makes the device highly compatible with mechanical unloading systems.

[0013] 2. This invention, by setting up a motor, a rotating shaft and a gear for coordinated use, enables the motor to drive the ring die to move upward while simultaneously driving the ring die to rotate. The timing of driving the ring die to move upward or rotate is achieved through the mechanical structure, without the need for special control, thereby reducing the manufacturing cost of this device.

[0014] 3. The present invention, by setting a limiting hole and a limiting shaft to cooperate, can limit the top plate and the ring mold, thereby ensuring the accuracy of the ring mold position. Moreover, the limiting shaft does not need to be specially controlled to release the limiting. It can be automatically released when the motor drives the ring mold to move upward, so that the limiting shaft will not affect the rotation of the ring mold. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a partial structural schematic diagram of the present invention; Figure 3 This is a partial cross-sectional view of the present invention; Figure 4 for Figure 3 Enlarged structural diagram at point A in the middle; Figure 5 for Figure 3 Enlarged structural diagram at point B; Figure 6 is a partial schematic diagram of the two structures of the present invention; Figure 7 is a partial three-structure schematic diagram of the present invention; Figure 8 is a schematic diagram of the motor structure of the present invention.

[0016] In the diagram: 1. Main body of injection molding equipment; 2. Upper mold; 3. Lower mold; 4. Ring mold; 5. Lower mold one; 6. Lower mold two; 7. Brush handle injection cavity; 8. Brush head injection cavity; 9. Toothbrush injection cavity; 10. Upper mold one; 11. Upper mold two; 12. Support plate; 13. Motor; 14. Rotating shaft; 15. Missing ejector wheel; 16. Missing gear; 17. Torque rod; 18. Inner sleeve one; 19. Inner sleeve two; 20. Full gear; 21. Top plate; 22. Limiting hole; 23. Limiting shaft; 24. Base plate one; 25. Support spring; 26. Base plate two; 27. Ball bearing; 28. Limiting rod. Detailed Implementation

[0017] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0018] Please see Figures 1 to 8A toothbrush handle injection molding device for recycling biomass plastic waste includes an injection molding device body 1, an upper mold 2, and a lower mold 3. The lower mold 3 includes a ring mold 4, and a lower mold 5 and a lower mold 6 are respectively provided on the outer side of the ring mold 4. The lower mold 5 and the lower mold 6 are fixedly connected to the injection molding device body 1. The upper surface of the lower mold 5 and the lower mold 2 has a brush handle injection cavity 7, and the upper surface of the ring mold 4 has a brush head injection cavity 8. The brush handle injection cavity 7 and the brush head injection cavity 8 can form a toothbrush injection cavity 9. The upper mold 2 includes an upper mold 10 and an upper mold 2 11. When the upper mold 10 and the upper mold 2 11 move down onto the lower mold 15 and the lower mold 2 6, the upper mold 2 and the lower mold 3 can be closed. A support plate 12 is fixedly connected to the inner wall of the injection molding device body 1, and a driving mechanism is provided above the support plate 12.

[0019] As can be seen from the above structure, this device can complete two injection molding processes in one operation when injection molding toothbrushes, so that toothbrushes that require two injection molding can be completed in one device, improving injection molding efficiency and saving time that would otherwise require two injection molding processes.

[0020] Furthermore, the drive mechanism includes a motor 13 fixedly connected to the support plate 12, and a rotating shaft 14 fixedly connected to the drive end of the motor 13. A notched wheel 15 is fixedly sleeved on the outer wall of the rotating shaft 14, and a notched gear 16 is fixedly connected to one end of the rotating shaft 14. A rectangular rod 17 is fixedly connected to the lower surface of the ring mold 4, and one end of the rectangular rod 17 passes through the injection molding equipment body 1 and the support plate 12 and extends into the interior of the injection molding equipment body 1. An inner sleeve 18 and an inner sleeve 2 slidably sleeved on the outer wall of the rectangular rod 17. The inner sleeve 18 is rotatably connected to the injection molding equipment body 1, and the inner sleeve 2 19... The inner sleeve 19 is rotatably connected to the support plate 12. The outer wall of the inner sleeve 19 is fixedly fitted with a full gear 20, which is located on the side of the missing gear 16. The outer wall of the torque rod 17 is fixedly fitted with a top plate 21, which is located above the missing top wheel 15. By setting the motor 13, the rotating shaft 14 and the missing gear 16 to work together, the motor 13 can drive the ring mold 4 to move upward while also driving the ring mold 4 to rotate. When to drive the ring mold 4 to move upward or rotate is achieved through the mechanical structure, without the need for special control, thereby reducing the manufacturing cost of this device.

[0021] Furthermore, the lower surface of the top plate 21 is provided with multiple limiting holes 22, and a limiting shaft 23 is provided in the limiting holes 22. One end of the limiting shaft 23 is fixedly connected to the support plate 12. By setting the limiting holes 22 and the limiting shaft 23 to cooperate, the top plate 21 and the ring mold 4 can be limited, thereby ensuring the accuracy of the position of the ring mold 4.

[0022] Furthermore, both the upper end of the limiting shaft 23 and the lower end of the limiting hole 22 are chamfered; by setting the chamfer, it is easier for the limiting shaft 23 to be inserted into the limiting hole 22.

[0023] Furthermore, the lower end of the rectangular rod 17 is fixedly connected to a base plate 24, and a support spring 25 is provided below the base plate 24. The support spring 25 is fixedly connected to the inner wall of the injection molding equipment body 1. By providing the support spring 25, the rectangular rod 17 and the ring mold 4 can be supported to a certain extent, which makes it easier for the motor 13 to drive other structures to lift the ring mold 4.

[0024] Furthermore, the upper end of the support spring 25 is fixedly connected to the base plate 26, and the base plate 26 is located below the base plate 24. The lower surface of the base plate 24 has a slot, and a ball bearing 27 is provided in the slot. One side wall of the ball bearing 27 contacts the base plate 26. By setting the base plate 26, the support spring 25 can be protected. By setting the ball bearing 27, the friction between the base plate 24 and the base plate 26 can be reduced, thereby facilitating the rotation of the ring mold 4.

[0025] Furthermore, a limiting rod 28 is fixedly connected to the inner wall of the main body 1 of the injection molding equipment, and one end of the limiting rod 28 is set through the second base plate 26. The limiting rod 28 is slidably connected to the second base plate 26. By setting the limiting rod 28, the stability of the second base plate 26 when it moves can be improved.

[0026] In this invention, during use, the main body 1 of the injection molding equipment drives the upper mold 2 to move downward, so that the upper mold 2 and the lower mold 3 close together. When the mold is closed, the upper mold 10 injects into the toothbrush injection cavity 9 formed by the lower mold 5 and the ring mold 4 to form the toothbrush handle body. The upper mold 2 moves upward to separate the mold. Then the motor 13 starts and drives the rotating shaft 14 to rotate. The rotating shaft 14 drives the ejector wheel 15 and the gear 16 to rotate. After the ejector wheel 15 rotates a certain angle, the ejector wheel 15 lifts the top plate 21, the rod 17 and the ring mold 4, so that the ring mold 4 moves upward. The moving ring mold 4 drives the toothbrush handle body to move upward, so that the toothbrush handle body is separated from the brush handle injection cavity 7 of the lower mold 5. At the same time, when the top plate 21 moves upward, the limiting hole 22 is separated from the limiting shaft 23, thus completing the release of the limit. After the motor 13 continues to drive the rotating shaft 14, the missing top wheel 15 and the missing gear 16 to rotate 120 degrees, the missing gear 16 rotates to the position of meshing with the full gear 20, so that the missing gear 16 can drive the full gear 20 to rotate. The rotating full gear 20 drives the inner sleeve 19 to rotate. The rotating inner sleeve 19 drives the torque rod 17 and the ring mold 4 to rotate. The rotating ring mold 4 drives the toothbrush handle body to rotate. When the toothbrush handle body rotates to the top of the brush handle injection cavity 7 of the lower mold 6, the missing gear 16 disengages from the full gear 20. Then the missing part of the missing top wheel 15 rotates to the position of contacting the top plate 21, so that the top plate 21 loses support. At this time, the top plate 21, the torque rod 17 and the ring mold 4 move down under the action of gravity. The moving ring mold 4 drives the toothbrush handle body to move down, so that the toothbrush handle body falls into the brush handle injection cavity 7 of the lower mold 6. When the top plate 21 moves down, the limiting hole 22 on the top plate 21 can fall back into the limiting shaft 23. Through the limiting hole 22 and the limiting shaft 23, the accuracy of the device position can be ensured, thereby ensuring that the toothbrush handle body can fall correctly into the brush handle injection cavity 7 of the lower mold 2 6. Then the main body 1 of the injection molding equipment can drive the upper mold 2 to move down, so that the upper mold 2 11 of the upper mold 2 and the lower mold 2 6 of the lower mold 3 are joined outside the toothbrush handle body to perform the overmolding injection molding of the toothbrush handle body. At the same time, the upper mold 10 and the lower mold 15 perform the injection molding of the next toothbrush handle body. After the overmolding and injection molding of the next toothbrush handle body are completed, the motor 13 can drive the ring mold 4 to move upward and rotate 120 degrees, so that the toothbrush handle that has been overmolded can be moved to the side of the lower mold 5 and the lower mold 6. During the next injection molding, the toothbrush handle can be unloaded. This way, the unloading will not delay the injection process, thus ensuring the efficiency of the injection. At the same time, the toothbrush handle that needs to be unloaded is limited by the ring mold 4, so that the position of the toothbrush handle that needs to be unloaded is fixed, which is convenient for mechanical equipment to pick up. This makes this device very suitable for mechanical equipment unloading.

[0027] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A toothbrush handle injection molding equipment for recycling biomass plastic waste, comprising an injection molding equipment body (1), an upper mold (2), and a lower mold (3), characterized in that, The lower mold (3) includes a ring mold (4), and a lower mold one (5) and a lower mold two (6) are respectively provided on the outer side of the ring mold (4). The lower mold one (5) and the lower mold two (6) are fixedly connected to the injection molding equipment body (1). The upper surface of the lower mold one (5) and the lower mold two (6) is provided with a brush handle injection cavity (7). The upper surface of the ring mold (4) is provided with a brush head injection cavity (8). The brush handle injection cavity (7) and the brush head injection cavity (8) can form a toothbrush injection cavity (9). The upper mold (2) includes an upper mold one (10) and an upper mold two (11). When the upper mold one (10) and the upper mold two (11) move down to the lower mold one (5) and the lower mold two (6), the upper mold (2) and the lower mold (3) can be closed. The inner wall of the injection molding equipment body (1) is fixedly connected with a support plate (12), and a driving mechanism is provided above the support plate (12). The driving mechanism includes a motor (13) fixedly connected to the support plate (12), and a rotating shaft (14) is fixedly connected to the driving end of the motor (13). A notched wheel (15) is fixedly sleeved on the outer wall of the rotating shaft (14), and a notched gear (16) is fixedly connected to one end of the rotating shaft (14). A rectangular rod (17) is fixedly connected to the lower surface of the ring mold (4), and one end of the rectangular rod (17) penetrates the injection molding equipment body (1) and the support plate (12) and extends into the interior of the injection molding equipment body (1). The outer wall of the rod (17) is fitted with an inner sleeve one (18) and an inner sleeve two (19). The inner sleeve one (18) is rotatably connected to the main body (1) of the injection molding equipment, and the inner sleeve two (19) is rotatably connected to the support plate (12). The outer wall of the inner sleeve two (19) is fixedly fitted with a full gear (20), and the full gear (20) is located on the side of the missing gear (16). The outer wall of the rod (17) is fixedly fitted with a top plate (21), and the top plate (21) is located above the missing top wheel (15).

2. The toothbrush handle injection molding equipment for recycling biomass plastic waste according to claim 1, characterized in that, The lower surface of the top plate (21) is provided with a plurality of limiting holes (22), and a limiting shaft (23) is provided in the limiting hole (22). One end of the limiting shaft (23) is fixedly connected to the support plate (12).

3. The toothbrush handle injection molding equipment for recycling biomass plastic waste according to claim 2, characterized in that, The upper end of the limiting shaft (23) and the lower end of the limiting hole (22) are both chamfered.

4. The toothbrush handle injection molding equipment for recycling biomass plastic waste according to claim 2, characterized in that, The lower end of the rod (17) is fixedly connected to a base plate (24), and a support spring (25) is provided below the base plate (24), and the support spring (25) is fixedly connected to the inner wall of the injection molding equipment body (1).

5. The toothbrush handle injection molding equipment for recycling biomass plastic waste according to claim 4, characterized in that, The upper end of the support spring (25) is fixedly connected to the second base plate (26), and the second base plate (26) is located below the first base plate (24). The lower surface of the first base plate (24) is provided with a slot, and a ball (27) is provided in the slot. One side wall of the ball (27) is in contact with the second base plate (26).

6. The toothbrush handle injection molding equipment for recycling biomass plastic waste according to claim 5, characterized in that, The inner wall of the main body (1) of the injection molding equipment is fixedly connected to a limiting rod (28), and one end of the limiting rod (28) passes through the bottom plate (26). The limiting rod (28) is slidably connected to the bottom plate (26).

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