Multi-color injection molding rapid forming mold

Abstract

The utility model relates to the technical field of multi-color injection molding, in particular to a multi-color injection molding rapid forming mold which comprises a mounting plate, the top of the mounting plate is fixedly connected with a lower mold, the top of the lower mold is provided with a mold cavity, a driving assembly is arranged in the lower mold, the driving assembly is connected with a plurality of cams, and the cams are arranged in the mold cavity. The lower mold is connected with an ejection assembly, the ejection assembly is used for ejecting a product in the mold cavity, the ejection assembly comprises a lifting rod, and the bottom of the lifting rod is connected to the outer periphery of the cam in a sliding mode. According to the utility model, the jacking plate stably ascends in the die cavity, so that a product in the die cavity is stably jacked up, the contact area with the product is increased, the pressure during jacking is effectively dispersed, the risk that local stress is excessively concentrated is reduced, the elastic characteristic of the reset spring is beneficial to reducing the impact force of the lifting plate to the product during jacking, and the product quality is improved. Therefore, the damage to the product caused by improper ejection operation is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of multi-color injection molding, in particular to a multi-color injection molding rapid molding mold. Background Art

[0002] Multi-color injection molding is an advanced injection molding technology that can simultaneously inject multiple colors of plastic raw materials on an injection molding machine to produce plastic products with multiple colors and textures. Rapid prototyping molds play a vital role in multi-color injection molding. Their fast and accurate manufacturing capabilities not only shorten the production cycle and improve production efficiency, but also ensure the high quality and consistency of the products. In addition, the application of rapid prototyping molds reduces downtime and material waste, reduces production costs, and its short-cycle manufacturing characteristics also reduce the operating costs of enterprises. Most importantly, the flexibility of rapid prototyping molds enables them to quickly adapt to market changes, quickly produce a variety of multi-color injection products, meet the different needs of the market, and enhance the market competitiveness of enterprises. Therefore, rapid prototyping molds play a core role in multi-color injection molding technology and are the key to achieving efficient, high-quality, low-cost and diversified production.

[0003] The patent with publication number CN219132997U discloses a multi-color injection rapid prototyping mold. Through the coordinated use of knobs, slide grooves, bidirectional screws, sliders and connecting rods, it is convenient to drive the lifting plate to move upward, and then it is convenient to drive the ejector rod upward to lift the product formed in the molding cavity to realize the product demolding operation. In this document, the ejector rod lifts the product formed in the molding cavity upward, and the contact area between the ejector rod and the product is small. Due to the small contact area, the pressure applied upward by the ejector rod will be concentrated in a very limited area. This concentrated pressure will cause the material in this area to be subjected to higher stress, especially in the weak parts of the product or the complex structural areas. High stress may cause the product to deform, crack or even break in this area, seriously affecting the quality of the product. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model provides a multi-color injection rapid prototyping mold, which solves the problem in the prior art that when the ejector pin ejects the product upward, the pressure applied will be concentrated in a very limited area due to the small contact surface. This concentrated pressure will cause the material in this area to be subjected to higher stress, especially in weak parts or areas with complex structures of the product. The high stress may cause the product to deform, crack or even break in this area, seriously affecting the quality of the product.

[0005] In order to solve the above technical problems, the utility model provides the following technical solutions: a multi-color injection rapid prototyping mold, comprising a mounting plate, the top of the mounting plate is fixedly connected to a lower mold, the top of the lower mold is provided with a mold cavity, a driving assembly is provided in the lower mold, a plurality of cams are connected to the driving assembly, an ejection assembly is connected to the lower mold, and the ejection assembly is used to lift the product inside the mold cavity;

[0006] The ejection assembly includes a lifting rod, the bottom of the lifting rod is slidably connected to the outer periphery of the cam, the top of the lifting rod is fixedly connected to a lifting plate, the top of the lifting plate is fixedly connected to a return spring, and the top of the return spring is fixedly connected to a lift plate;

[0007] Both sides of the top of the lifting plate are fixedly connected with tension springs, and the tops of the tension springs are fixedly connected to the lower mold.

[0008] Furthermore, the lifting plate is located inside the mold cavity, and the top of the lifting plate is flush with the inner bottom wall of the mold cavity.

[0009] Furthermore, a ball is rollingly connected to the bottom of the lifting rod, and the ball is rollingly connected to the outer periphery of the cam.

[0010] Furthermore, a telescopic rod is fixedly connected to the top of the lifting plate, the top of the telescopic rod is fixedly connected to the bottom of the lifting plate, and the return spring is movably sleeved on the outer surface of the telescopic rod.

[0011] Furthermore, the lower mold is provided with an adjusting groove, and the driving assembly, the plurality of cams and the ejection assembly are located inside the adjusting groove.

[0012] Furthermore, the bottom of the tension spring is fixedly connected to the top of the lifting plate, and the top of the tension spring is fixedly connected to the inner top wall of the adjusting groove.

[0013] Further, the driving assembly includes a driving motor, the driving motor is fixedly connected to the inner bottom wall of the adjusting slot, the output end of the driving motor is fixedly connected to a first rotating rod, and first bevel gears are fixedly sleeved on both sides of the outer surface of the first rotating rod;

[0014] The second rotating rods are rotatably connected to both sides of the bottom wall of the adjusting groove, and one end of the second rotating rod is fixedly sleeved with a second bevel gear, and the teeth of the second bevel gear are meshed with the teeth of the first bevel gear.

[0015] Furthermore, the cam is fixedly sleeved on the outer surface of the second rotating rod.

[0016] Furthermore, positioning rods are fixedly connected to the four corners of the top of the mounting plate.

[0017] By means of the above technical solution, the utility model provides a multi-color injection rapid prototyping mold, which has at least the following beneficial effects:

[0018] 1. The multi-color injection rapid prototyping mold, the driving assembly effectively drives the cam to rotate, the lifting rod slides smoothly on the outer edge of the cam, prompting the lifting plate to move upward, and then, through the elastic force of the return spring, the lift plate rises steadily in the mold cavity, and then the product in the mold cavity is smoothly lifted, increasing the contact area with the product, effectively dispersing the pressure during ejection, thereby reducing the risk of excessive local stress concentration, and the elastic characteristics of the return spring help to reduce the impact of the lifting plate on the product during ejection, thereby avoiding damage to the product due to improper ejection operation.

[0019] 2. For the multi-color injection rapid prototyping mold, after the driving motor is started, its operating force is transmitted to the first bevel gear through the first rotating rod, so that the first bevel gear starts to rotate. Subsequently, the first bevel gear transmits the rotational force to the second bevel gear through the meshing action between the gears, thereby driving the second rotating rod to rotate. This series of rotational actions eventually drives the cam to rotate. Through the rotation of the cam, the elastic lifting operation of the product in the mold cavity can be realized. During the whole process, the power transmission is smooth and efficient, ensuring the accuracy and reliability of the product ejection, and then the product in the mold cavity can be elastically lifted. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application:

[0021] Figure 1 It is a schematic diagram of the structure of the utility model;

[0022] Figure 2 It is a schematic diagram of the local structure of the utility model;

[0023] Figure 3 This is a schematic diagram of the drive assembly and cam structure of the utility model.

[0024] Figure 4 It is a schematic diagram of the structure of the ejection assembly of the utility model.

[0025] In the figure: 1. mounting plate; 2. lower mold; 3. mold cavity; 4. adjusting slot; 5. driving assembly; 501. driving motor; 502. first rotating rod; 503. first bevel gear; 504. second rotating rod; 505. second bevel gear; 6. cam; 7. ejector assembly; 701. lifting rod; 702. lifting plate; 703. reset spring; 704. lifting plate; 705. telescopic rod; 706. tension spring; 8. positioning rod. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] See also Figure 1-4 A multi-color injection rapid prototyping mold comprises a mounting plate 1, a lower mold 2 is fixedly connected to the top of the mounting plate 1, a mold cavity 3 is arranged on the top of the lower mold 2, a driving assembly 5 is arranged inside the lower mold 2, a plurality of cams 6 are connected to the driving assembly 5, an ejection assembly 7 is connected to the lower mold 2, the ejection assembly 7 is used to lift the product inside the mold cavity 3, and positioning rods 8 are fixedly connected to the four corners of the top of the mounting plate 1.

[0028] The ejection assembly 7 includes a lifting rod 701, the bottom of which is slidably connected to the outer periphery of the cam 6, the top of the lifting rod 701 is fixedly connected to a lifting plate 702, the top of the lifting plate 702 is fixedly connected to a return spring 703, and the top of the return spring 703 is fixedly connected to a lifting plate 704; the operation of the driving assembly 5 effectively drives the cam 6 to rotate, the lifting rod 701 slides smoothly on the outer edge of the cam 6, causing the lifting plate 702 to move upward, and then, through the elastic force of the return spring 703, the lifting plate 704 rises steadily in the mold cavity 3, thereby steadily lifting the product in the mold cavity 3, increasing the contact area with the product, and effectively dispersing the pressure during ejection, thereby reducing the risk of excessive local stress concentration, and the elastic characteristics of the return spring 703 help to reduce the impact force of the lifting plate 702 on the product during ejection, thereby avoiding damage to the product caused by improper ejection operation.

[0029] Tension springs 706 are fixedly connected to both sides of the top of the lifting plate 702, and the top of the tension spring 706 is fixedly connected to the lower mold 2. After the product is lifted, the cam 6 rotates, and the lifting plate 704 can be moved downward through the tension spring 706, so that the lifting plate 704 is flush with the inner bottom wall of the mold cavity 3.

[0030] The lifting plate 702 is located inside the mold cavity 3 , and the top of the lifting plate 702 is flush with the inner bottom wall of the mold cavity 3 .

[0031] The bottom of the lifting rod 701 is rollingly connected with a ball, and the ball is rollingly connected to the outer periphery of the cam 6. The rolling connection of the ball greatly reduces the friction, so that the lifting rod 701 slides more smoothly on the outer periphery of the cam 6, and reduces the friction between the lifting rod 701 and the cam 6.

[0032] The top of the lifting plate 702 is fixedly connected to a telescopic rod 705, the top of the telescopic rod 705 is fixedly connected to the bottom of the lifting plate 704, and the return spring 703 is movably sleeved on the outer surface of the telescopic rod 705. The telescopic rod 705 provides a stable connection and support structure between the lifting plate 702 and the lifting plate 704. During the lifting process, the telescopic rod 705 can ensure the relative position between the two is stable, prevent displacement or dislocation during the ejection process, thereby ensuring the accuracy and stability of the ejection operation. The telescopic rod 705 provides a guide and support for the return spring 703, ensuring that the return spring 703 can maintain the correct direction during the extension and retraction process to avoid twisting or deformation.

[0033] The lower mold 2 is provided with an adjustment groove 4, and a driving assembly 5, a plurality of cams 6 and an ejection assembly 7 are located inside the adjustment groove 4. The driving assembly 5, the plurality of cams 6 and the ejection assembly 7 are conveniently connected.

[0034] The bottom of the tension spring 706 is fixedly connected to the top of the lifting plate 702, and the top of the tension spring 706 is fixedly connected to the inner top wall of the adjustment slot 4. A certain force is provided for the reset of the lifting plate 702.

[0035] The driving assembly 5 includes a driving motor 501, which is fixedly connected to the inner bottom wall of the adjusting slot 4. The output end of the driving motor 501 is fixedly connected to a first rotating rod 502, and first bevel gears 503 are fixedly sleeved on both sides of the outer surface of the first rotating rod 502.

[0036] The second rotating rod 504 is rotatably connected to both sides of the inner bottom wall of the adjustment groove 4, and the cam 6 is fixedly sleeved on the outer surface of the second rotating rod 504. A second bevel gear 505 is fixedly sleeved on one end of the second rotating rod 504, and the teeth of the second bevel gear 505 mesh with the teeth of the first bevel gear 503. After the driving motor 501 is started, its operating force is transmitted to the first bevel gear 503 through the first rotating rod 502, so that the first bevel gear 503 starts to rotate. Subsequently, the first bevel gear 503 transmits the rotational force to the second bevel gear 505 through the meshing action between the gears, thereby driving the second rotating rod 504 to rotate. This series of rotation actions eventually drives the cam 6 to rotate. Through the rotation of the cam 6, the elastic lifting operation of the product in the mold cavity 3 can be realized. In the whole process, the power transmission is stable and efficient, ensuring the accuracy and reliability of the product ejection, and then the product in the mold cavity 3 can be elastically lifted.

[0037] When in use, after the driving motor 501 is started, its operating force is transmitted to the first bevel gear 503 through the first rotating rod 502, so that the first bevel gear 503 starts to rotate. Subsequently, the first bevel gear 503 transmits the rotational force to the second bevel gear 505 through the meshing action between the gears, thereby driving the second rotating rod 504 to rotate. This series of rotation actions eventually drives the cam 6 to rotate, and through the rotation of the cam 6;

[0038] The lifting rod 701 slides smoothly on the outer edge of the cam 6, causing the lifting plate 702 to move upward. Subsequently, through the elastic force of the return spring 703, the lifting plate 704 rises steadily in the mold cavity 3, thereby steadily lifting the product in the mold cavity 3, increasing the contact area with the product, and effectively dispersing the pressure during ejection, thereby reducing the risk of excessive local stress concentration. The elastic characteristics of the return spring 703 help to reduce the impact force of the lifting plate 702 on the product during ejection, thereby avoiding damage to the product due to improper ejection operation.

[0039] It should be noted that the terms "comprises", "includes" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or apparatus that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or apparatus.

[0040] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A multi-color injection rapid prototyping mold, comprising a mounting plate (1), characterized in that: The top of the mounting plate (1) is fixedly connected to a lower mold (2), the top of the lower mold (2) is provided with a mold cavity (3), a driving assembly (5) is provided inside the lower mold (2), a plurality of cams (6) are connected to the driving assembly (5), and an ejection assembly (7) is connected to the lower mold (2), and the ejection assembly (7) is used to lift the product inside the mold cavity (3); The ejection assembly (7) comprises a lifting rod (701), the bottom of the lifting rod (701) is slidably connected to the outer periphery of the cam (6), the top of the lifting rod (701) is fixedly connected to a lifting plate (702), the top of the lifting plate (702) is fixedly connected to a return spring (703), and the top of the return spring (703) is fixedly connected to a lift plate (704); Both sides of the top of the lifting plate (702) are fixedly connected with tension springs (706), and the top of the tension spring (706) is fixedly connected to the lower mold (2).

2. The multi-color injection rapid prototyping mold according to claim 1, characterized in that: The lifting plate (702) is located inside the mold cavity (3), and the top of the lifting plate (702) is flush with the inner bottom wall of the mold cavity (3).

3. The multi-color injection rapid prototyping mold according to claim 1, characterized in that: The bottom of the lifting rod (701) is rollingly connected with a ball, and the ball is rollingly connected to the outer periphery of the cam (6).

4. The multi-color injection rapid prototyping mold according to claim 1, characterized in that: The top of the lifting plate (702) is fixedly connected to a telescopic rod (705), the top of the telescopic rod (705) is fixedly connected to the bottom of the lifting plate (704), and the return spring (703) is movably sleeved on the outer surface of the telescopic rod (705).

5. The multi-color injection rapid prototyping mold according to claim 1, characterized in that: The lower mold (2) is provided with an adjustment groove (4), and the driving assembly (5), a plurality of cams (6) and an ejection assembly (7) are located inside the adjustment groove (4).

6. The multi-color injection rapid prototyping mold according to claim 5, characterized in that: The bottom of the tension spring (706) is fixedly connected to the top of the lifting plate (702), and the top of the tension spring (706) is fixedly connected to the inner top wall of the adjustment groove (4).

7. The multi-color injection rapid prototyping mold according to claim 6, characterized in that: The driving assembly (5) comprises a driving motor (501), the driving motor (501) being fixedly connected to the inner bottom wall of the adjusting groove (4), the output end of the driving motor (501) being fixedly connected to a first rotating rod (502), and first bevel gears (503) being fixedly sleeved on both sides of the outer surface of the first rotating rod (502); The second rotating rod (504) is rotatably connected to both sides of the inner bottom wall of the adjustment groove (4), and one end of the second rotating rod (504) is fixedly sleeved with a second bevel gear (505), and the teeth of the second bevel gear (505) are meshed with the teeth of the first bevel gear (503).

8. The multi-color injection rapid prototyping mold according to claim 7, characterized in that: The cam (6) is fixedly sleeved on the outer surface of the second rotating rod (504).

9. The multi-color injection rapid prototyping mold according to claim 1, characterized in that: Positioning rods (8) are fixedly connected to the four corners of the top of the mounting plate (1).

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