A multi-color continuous injection molding device for toothbrush handles
By using a multi-color continuous injection molding device, the toothbrush handle can be injection molded in multiple colors in one piece by using a rotary table and a mold. This solves the problems of complex structure and high cost of existing devices, improves work efficiency and reduces equipment operating costs.
Patent Information
- Application Number
- CN202522247074.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-10-24
- Publication Date
- 2026-11-06
- Estimated Expiration
- 2035-10-24
AI Technical Summary
Existing multi-color injection molding devices for toothbrush handles have complex structures, resulting in complicated processes and high costs, and cannot achieve convenient multi-color effects.
The multi-color continuous injection molding device uses a rotary table and mold to achieve multi-color one-piece injection molding of toothbrush handles. The drive and support devices drive the mold to rotate and lift, and the ejection mechanism facilitates demolding, reducing equipment operating costs.
This technology enables continuous injection molding of multiple colors for toothbrush handles, improving work efficiency, reducing equipment operating costs, simplifying processes, and facilitating the achievement of multi-color effects.
Smart Images
Figure CN224940401U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of injection molding equipment, and in particular to a multi-color continuous injection molding equipment for toothbrush handles. Background Technology
[0002] As a daily necessity, toothbrushes are evolving from single-function products to personalized and aesthetically pleasing designs. Consumers have increasingly diverse demands for the appearance of toothbrush handles, with multi-color splicing, gradient colors, and brand logo embedding becoming key to enhancing product competitiveness. Traditional equipment can only achieve single-color molding, and multi-color effects require secondary assembly or spraying, resulting in complex processes and high costs.
[0003] For example, the existing technology announcement number CN222755921U patent relates to the field of toothbrush production technology. Specifically, it discloses a multi-color continuous injection molding device for toothbrush handles, including an injection molding table, a first injection molding machine, a second injection molding machine, and a feeding mechanism. A moving groove is provided in the middle of the injection molding table, and the feeding mechanism is located inside the moving groove. Molds are provided on both sides of the moving groove on the injection molding table.
[0004] During the use of existing equipment, it was found that the structure of the existing equipment is relatively complex, which increases the operating cost of the equipment and reduces the convenience of use. Utility Model Content
[0005] To solve the above-mentioned technical problems, this utility model provides a toothbrush handle multi-color continuous injection molding device that facilitates the realization of multi-color continuous injection molding of toothbrush handles, improves work efficiency, and reduces equipment operating costs.
[0006] This utility model discloses a multi-color continuous injection molding device for toothbrush handles, comprising a housing and a guide rail, with the guide rail mounted on the top of the housing; it also includes a drive device, an ejection mechanism, a support device, a rotary table, lower molds, and upper molds. The rotary table is powered by the drive device and rotated on the guide rails. Multiple sets of lower molds are mounted on the rotary table, and each lower mold is equipped with an ejection mechanism for ejecting the molded toothbrush handle upwards for demolding. Two sets of upper molds are mounted on the support device, which drives the two sets of upper molds to move up and down, and the two sets of upper molds are connected to an external feeding device. The first type of raw material for the toothbrush handle is fed into the upper mold, and the first set of upper molds is driven by the support device. The process moves downwards, allowing the first set of upper molds to engage with one of the lower molds to injection mold the first color of the toothbrush handle. Then, a drive device rotates the rotary table, causing multiple sets of lower molds to move to different positions. At this point, the lower mold containing the first toothbrush handle color moves to below the second set of upper molds. The second material is then fed into the second set of upper molds, and the upper molds and lower molds are joined, resulting in a single injection molded color between the first and second colors of the toothbrush handle. The next set of lower molds then moves to below the first set of upper molds. By repeating this process, a multi-color continuous injection molding effect for the toothbrush handle is achieved, improving work efficiency and reducing equipment operating costs.
[0007] Preferably, the ejection mechanism includes an ejector rod, a spring, a limiting member, a frame, a first cylinder, and a push rod. The upper part of the ejector rod is slidably mounted on the bottom of the lower mold, and the top end of the ejector rod is flush with the bottom of the inner cavity of the lower mold. The spring is fitted onto the outer wall of the ejector rod. The limiting member is mounted on the bottom end of the lower mold, and the bottom end of the limiting member provides limiting support to the bottom end of the ejector rod. The frame is mounted on the inner wall of the housing, and the first cylinder is mounted on the outer wall of the frame. A push rod is provided at the top end of the first cylinder, and the push rod is slidably mounted on the frame. In the initial state, the top end of the ejector rod is flush with the bottom of the inner cavity of the lower mold. After the toothbrush handle in the lower mold is injection molded, the lower mold moves above the push rod and aligns the bottom end of the ejector rod with the top end of the push rod. Then, the first cylinder drives the push rod to move upward, causing the push rod to push the ejector rod upward into the inner cavity of the lower mold, thereby moving the toothbrush handle formed in the lower mold upward to demold, improving the convenience of unloading the toothbrush handle.
[0008] Preferably, the driving device includes a connecting shaft, a worm gear, a worm, and a motor. The top end of the connecting shaft is connected to the bottom end of the rotary table, and the bottom end of the connecting shaft is rotatably mounted on the housing. The worm gear is mounted on the outer wall of the connecting shaft, the worm is rotatably mounted inside the housing and meshes with the worm gear, and the motor is mounted inside the housing and connected to the worm. The motor drives the worm to rotate, which in turn drives the connecting shaft to rotate via the worm gear, thereby causing the connecting shaft to rotate the rotary table.
[0009] Preferably, the support device includes a bracket and a second cylinder. The bracket is installed on the outer wall of the housing, and both sets of second cylinders are installed on the bracket. The moving ends of the two sets of second cylinders are respectively connected to the top of the two sets of upper molds. The two sets of second cylinders drive the two sets of upper molds to move up and down, thereby improving the convenience of injection molding of the two sets of upper molds and lower molds.
[0010] Preferably, it also includes a refrigeration box and a fan. The refrigeration box is connected to the shell, and the fan is connected and installed between the shell and the refrigeration box. The fan circulates the air in the shell into the refrigeration box, which cools the air. This cools the multiple sets of lower molds, thereby improving the cooling and molding efficiency of the toothbrush handle.
[0011] Preferably, it also includes guide columns, with multiple sets of guide columns slidably mounted on the bracket, and the bottom ends of the multiple sets of guide columns respectively connected to the top ends of the two sets of upper molds; thereby improving the stability of the lifting and moving of the two sets of upper molds.
[0012] Preferably, it also includes a thermometer, which is connected and mounted on the housing; this improves the convenience of temperature measurement inside the housing.
[0013] Compared with the prior art, the beneficial effects of this utility model are as follows: The first raw material of the toothbrush handle is conveyed into the upper mold. The first set of upper molds is moved downward by the support device, so that the first set of upper molds cooperates with one of the lower molds to injection mold the first color of the toothbrush handle. Then, the drive device drives the rotary table to rotate, so that the rotary table drives multiple sets of lower molds to move to different positions. At this time, the lower mold with the first color of the toothbrush handle is moved to the bottom of the second set of upper molds. The second raw material is conveyed into the second set of upper molds, and the second set of upper molds is closed with the lower mold, so that the second color of the toothbrush handle is integrally injection molded with the first color. At this time, the next set of lower molds moves to the bottom of the first set of upper molds. By repeating the above process, the effect of multi-color continuous injection molding of the toothbrush handle is achieved, improving work efficiency and reducing equipment operating costs. Attached Figure Description
[0014] Figure 1 This is a schematic diagram of the isometric structure of this utility model; Figure 2 This is a partial isometric structural diagram of the connection between the lower mold and the limiting components, etc. Figure 3 This is a partial isometric structural diagram of the connection between the rotary table and the lower mold, etc. Figure 4 This is a partial isometric structural diagram of the connection between the connecting shaft and the worm gear, etc. Figure 5 This is an isometric structural diagram of the connection between the refrigeration box and the fan, etc.
[0015] The following components are labeled in the attached diagram: 1. Housing; 2. Guide rail; 3. Rotary table; 4. Lower mold; 5. Upper mold; 6. Ejector rod; 7. Spring; 8. Limiting component; 9. Frame; 10. First cylinder; 11. Push rod; 12. Connecting shaft; 13. Worm gear; 14. Worm; 15. Motor; 16. Bracket; 17. Second cylinder; 18. Refrigeration box; 19. Fan; 20. Guide column; 21. Thermometer. Detailed Implementation
[0016] To facilitate understanding of this utility model, a more complete description will be given below with reference to the accompanying drawings. This utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to make the disclosure of this utility model more thorough and complete. Example 1
[0017] like Figures 1 to 5 As shown, this utility model discloses a multi-color continuous injection molding device for toothbrush handles, including a housing 1 and a guide rail 2, with the guide rail 2 installed at the top of the housing 1; it also includes a drive device, an ejection mechanism, a support device, a rotary table 3, a lower mold 4, and an upper mold 5. The rotary table 3 is powered by the drive device and rotated on the guide rail 2. Multiple sets of lower molds 4 are arranged on the rotary table 3, and the lower molds 4 are equipped with an ejection mechanism for ejecting the molded toothbrush handle upwards to demold. Two sets of upper molds 5 are installed on the support device, which is used to drive the two sets of upper molds 5 to move up and down, and the two sets of upper molds 5 are connected to an external feeding device. like Figure 2 As shown, the ejection mechanism includes an ejector rod 6, a spring 7, a limiting member 8, a frame 9, a first cylinder 10, and a push rod 11. The upper part of the ejector rod 6 is slidably installed at the bottom of the lower mold 4, and the top of the ejector rod 6 is flush with the bottom of the inner cavity of the lower mold 4. The spring 7 is fitted onto the outer wall of the ejector rod 6. The limiting member 8 is installed at the bottom of the lower mold 4, and the bottom of the limiting member 8 provides limiting support to the bottom of the ejector rod 6. The frame 9 is installed on the inner wall of the housing 1. The first cylinder 10 is installed on the outer wall of the frame 9. The top of the first cylinder 10 is provided with a push rod 11, which is slidably installed on the frame 9. In this embodiment, the first raw material for the toothbrush handle is fed into the upper mold 5. A support device drives the first set of upper molds 5 to move downwards, so that the first set of upper molds 5 cooperates with one of the lower molds 4 to injection mold the first color of the toothbrush handle. Then, a drive device drives the rotary table 3 to rotate, so that the rotary table 3 drives multiple sets of lower molds 4 to move to different positions. At this time, the lower mold 4 with the first toothbrush handle color is moved to the bottom of the second set of upper molds 5. The second raw material is fed into the second set of upper molds 5, and the second set of upper molds 5 and the lower mold 4 are joined together, so that the second color of the toothbrush handle is integrally injection molded with the first color. At this time, the next set of lower molds 4 moves to the bottom of the first set of upper molds 5. By repeating the above process, the effect of multi-color continuous injection molding of the toothbrush handle is achieved, improving work efficiency and reducing equipment operating costs. Example 2
[0018] Based on Example 1, such as Figure 4 As shown, this utility model discloses a multi-color continuous injection molding device for toothbrush handles. The driving device includes a connecting shaft 12, a worm gear 13, a worm 14, and a motor 15. The top end of the connecting shaft 12 is connected to the bottom end of the rotating table 3, and the bottom end of the connecting shaft 12 is rotatably mounted on the housing 1. The worm gear 13 is mounted on the outer wall of the connecting shaft 12. The worm 14 is rotatably mounted inside the housing 1 and meshes with the worm gear 13. The motor 15 is mounted inside the housing 1 and connected to the worm 14. like Figure 5 As shown, the support device includes a bracket 16 and a second cylinder 17. The bracket 16 is installed on the outer wall of the housing 1, and the two sets of second cylinders 17 are installed on the bracket 16. The moving ends of the two sets of second cylinders 17 are respectively connected to the top of the two sets of upper molds 5. like Figure 5 As shown, it also includes a refrigeration box 18 and a fan 19. The refrigeration box 18 is connected to the inside of the shell 1, and the fan 19 is connected and disposed between the shell 1 and the refrigeration box 18. like Figure 5 As shown, it also includes guide posts 20, multiple sets of guide posts 20 are slidably mounted on the bracket 16, and the bottom ends of the multiple sets of guide posts 20 are respectively connected to the top ends of the two sets of upper molds 5; like Figure 1 As shown, it also includes a thermometer 21, which is connected to and disposed on the housing 1; In this embodiment, initially, the top of the ejector rod 6 is flush with the bottom of the inner cavity of the lower mold 4. After the toothbrush handle in the lower mold 4 is injection molded, the lower mold 4 moves above the push rod 11 and aligns the bottom of the ejector rod 6 with the top of the push rod 11. Then, the first cylinder 10 drives the push rod 11 to move upward, causing the push rod 11 to push the ejector rod 6 upward into the inner cavity of the lower mold 4, thereby causing the toothbrush handle formed in the lower mold 4 to move upward and be demolded, improving the convenience of unloading the toothbrush handle. The motor 15 drives the worm gear 14 to rotate, causing the worm gear 14 to drive the connecting shaft 12 to rotate through the worm wheel 13, thereby causing the connecting shaft 12 to drive the rotary table 3 to rotate.
[0019] This utility model discloses a multi-color continuous injection molding device for toothbrush handles. During operation, the first raw material for the toothbrush handle is fed into the upper mold 5. A support device drives the first set of upper molds 5 downwards, allowing them to cooperate with one set of lower molds 4 to injection mold the first color of the toothbrush handle. Then, a drive device rotates a rotary table 3, causing the rotary table 3 to move multiple sets of lower molds 4 to different positions. At this point, the lower mold 4 containing the first toothbrush handle color moves to below the second set of upper molds 5. The second raw material is fed into the second set of upper molds 5, and the second set of upper molds 5 and the lower mold 4 are joined, thus integrally molding the second color of the toothbrush handle with the first color. Then, the next set of lower molds 4 moves to below the first set of upper molds 5. By repeating the above process, the effect of multi-color continuous injection molding of the toothbrush handle is achieved.
[0020] The first cylinder 10, motor 15, second cylinder 17, refrigeration box 18, fan 19 and thermometer 21 of the multi-color continuous injection molding device for toothbrush handle of this utility model are commercially available. Technical personnel in this industry only need to install and operate them according to the accompanying instruction manual, without requiring any creative work from those skilled in the art.
[0021] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.
Claims
1. A multi-color continuous injection molding device for toothbrush handles, comprising a housing (1) and a guide rail (2), the guide rail (2) being mounted on the top of the housing (1); characterized in that, It also includes a drive device, an ejection mechanism, a support device, a rotary table (3), a lower mold (4), and an upper mold (5). The rotary table (3) is powered by the drive device and rotated on the guide rail (2). Multiple sets of lower molds (4) are set on the rotary table (3). The lower mold (4) is equipped with an ejection mechanism, which is used to eject the formed toothbrush handle upwards to demold. Two sets of upper molds (5) are installed on the support device, which is used to drive the two sets of upper molds (5) to move up and down. The two sets of upper molds (5) are connected to the external feeding equipment.
2. The multi-color continuous injection molding device for toothbrush handles as described in claim 1, characterized in that, The ejection mechanism includes an ejector rod (6), a spring (7), a limiting member (8), a frame (9), a first cylinder (10), and a push rod (11). The upper part of the ejector rod (6) is slidably installed at the bottom of the lower mold (4), and the top of the ejector rod (6) is flush with the bottom of the inner cavity of the lower mold (4). The spring (7) is fitted on the outer wall of the ejector rod (6). The limiting member (8) is installed at the bottom of the lower mold (4), and the bottom of the limiting member (8) provides limiting support to the bottom of the ejector rod (6). The frame (9) is installed on the inner wall of the housing (1). The first cylinder (10) is installed on the outer wall of the frame (9). The top of the first cylinder (10) is provided with a push rod (11), which is slidably installed on the frame (9).
3. The multi-color continuous injection molding device for toothbrush handles as described in claim 1, characterized in that, The drive device includes a connecting shaft (12), a worm wheel (13), a worm (14), and a motor (15). The top end of the connecting shaft (12) is connected to the bottom end of the rotary table (3). The bottom end of the connecting shaft (12) is rotatably mounted on the housing (1). The worm wheel (13) is mounted on the outer wall of the connecting shaft (12). The worm (14) is rotatably mounted inside the housing (1) and meshes with the worm wheel (13). The motor (15) is mounted inside the housing (1) and connected to the worm (14).
4. The multi-color continuous injection molding device for toothbrush handles as described in claim 1, characterized in that, The support device includes a bracket (16) and a second cylinder (17). The bracket (16) is installed on the outer wall of the housing (1). Both sets of second cylinders (17) are installed on the bracket (16). The moving ends of the two sets of second cylinders (17) are respectively connected to the top of the two sets of upper molds (5).
5. The multi-color continuous injection molding device for toothbrush handles as described in claim 1, characterized in that, It also includes a refrigeration box (18) and a fan (19). The refrigeration box (18) is connected to the shell (1), and the fan (19) is connected between the shell (1) and the refrigeration box (18).
6. The multi-color continuous injection molding device for toothbrush handles as described in claim 4, characterized in that, It also includes guide columns (20), multiple sets of guide columns (20) are slidably installed on the bracket (16), and the bottom ends of the multiple sets of guide columns (20) are respectively connected to the top ends of the two sets of upper molds (5).
7. The multi-color continuous injection molding device for toothbrush handles as described in claim 1, characterized in that, It also includes a thermometer (21), which is connected to the housing (1).