A servo-driven core-pulling device applied to an injection mold

Abstract

The utility model provides a kind of servo drive core-pulling device applied to injection mold, including base assembly, driving part, linear motion mechanism and core-pulling assembly, base assembly includes driving part fixing seat and support fixing seat, support fixing seat is located on one end of driving part fixing seat, driving part is located on the other end of driving part fixing seat, linear motion mechanism is located on support fixing seat, and it is connected with the output end of driving part, for the rotation of driving part output end is converted into linear motion, core-pulling assembly includes slider seat, slider core and connecting block, slider seat is located on linear motion mechanism, slider core is located on the right side wall of slider seat.The utility model can realize long-stroke core-pulling demand by servo driving part cooperation linear motion mechanism, and since the movement process of slider core is controlled by servo driving part, so full course can realize speed self-defined control, and precision can realize 0.002mm u-level repeat positioning accuracy.

Description

Technical Field

[0001] This utility model relates to the field of injection mold technology, specifically to a servo-driven core-pulling device applied to injection molds. Background Technology

[0002] Injection molds are important process equipment for producing various industrial products. With the rapid development of the metal industry and the widespread application of metal products in industries such as aviation, aerospace, electronics, machinery, shipbuilding and automobiles, injection molds are widely used in various industries.

[0003] In existing technologies, core-pulling devices are frequently used in injection molds for core removal. However, existing core-pulling devices cannot effectively perform core-pulling tasks when faced with special products and unique mold production conditions. For example, in medical products such as insulin injection pens, using existing slider mechanisms for core pulling presents the following problems:

[0004] 1. Existing core-pulling devices use mechanical levers to drive the slider core, with a stroke generally within 70mm, which cannot meet the requirements of insulin pen core pulling (the core pulling length is greater than the stroke length). To achieve a stroke exceeding 70mm, a hydraulic cylinder is required for drive. However, in special mold production conditions (such as GMP cleanrooms), using a hydraulic cylinder will cause environmental pollution.

[0005] 2. The sliding mechanism of the slider in the existing core-pulling device is sliding friction, which easily causes scratches on the friction surface, causing the core-pulling device to jam. This leads to increased maintenance time for the mold and reduced production efficiency.

[0006] In summary, existing technologies have certain limitations. Utility Model Content

[0007] This invention was developed to solve the above-mentioned problems, and its purpose is to provide a servo-driven core-pulling device for use in injection molds.

[0008] This utility model provides a servo-driven core-pulling device applied to injection molds, characterized by comprising: a base assembly, a driving component, a linear motion mechanism, and a core-pulling assembly.

[0009] The base assembly includes a drive component fixing seat and a support fixing seat. The drive component fixing seat has a first through hole for the output end of the drive component to pass through. The support fixing seat is located on one end of the drive component fixing seat. The interior of the support fixing seat has, from left to right, a second through hole communicating with the first through hole, a cavity communicating with the second through hole, and a third through hole communicating with the cavity. The top wall of the support fixing seat has a sliding hole communicating with the cavity.

[0010] The driving component is located on the other end of the driving component mounting base.

[0011] The linear motion mechanism is mounted on the support base and connected to the output end of the drive component, used to convert the rotation of the drive component's output end into linear motion.

[0012] The core-pulling assembly includes a slider seat, a slider core, and a connecting block. The slider seat is mounted on the linear motion mechanism, the slider core is mounted on the right side wall of the slider seat, and the connecting block is mounted on the slider seat. The top wall of the connecting block has multiple mounting holes.

[0013] The servo-driven core-pulling device for injection molds provided by this utility model also has the following features: the linear motion mechanism is a ball screw mechanism, including a first bearing, a second bearing, a fixed limiting assembly, a screw, a coupling, a nut assembly, a connecting plate, and a drive plate. The first bearing is disposed in a first through hole, and the second bearing is disposed in a second through hole. The fixed limiting assembly includes an annular bearing pressure block and a limiting block. The bearing pressure block is disposed at the opening of the second through hole for fixing the second bearing, and the limiting block is disposed on the bearing pressure block and coaxially arranged with the bearing pressure block. The screw package... The assembly includes rotating parts at both ends and a lead screw part in the middle. The rotating part at one end passes through a first bearing, and the rotating part at the other end passes through a second bearing. One end of the lead screw is connected to the output end of the drive component via a coupling, and the other end is rotatably located within a limiting block. The nut assembly includes a ball nut and a nut bracket. The ball nut is sleeved on the lead screw and cooperates with the lead screw part. The nut bracket is sleeved on the ball nut, and the four outer walls of the nut bracket are all flat. A connecting plate is provided on the nut bracket and is located in a sliding hole. The drive plate is U-shaped, and its top inner wall is connected to the top wall of the connecting plate.

[0014] Furthermore, ball bearing guides are provided on the top wall of the support and fixing base on both sides of the sliding hole, and a U-shaped slider is provided on the inner wall of the top of the drive plate at the position corresponding to the ball bearing guide. The slider is sleeved on the outer periphery of the corresponding ball bearing guide, and balls are provided between the slider and the ball bearing guide, so that the slider can be slidably mounted on the corresponding ball bearing guide.

[0015] Furthermore, it can also have the following characteristics: the lead screw sections at both ends of the lead screw are interference fits with the first bearing and the second bearing.

[0016] The servo-driven core-pulling device for injection molds provided by this utility model also has the following feature: the driving component is a servo motor.

[0017] Functions and effects of utility models

[0018] According to the servo-driven core-pulling device applied to injection molds involved in this utility model, the long-stroke core-pulling requirement can be achieved through the servo drive component and linear motion mechanism. Since the movement of the slider core is controlled by the servo drive component, the speed can be customized throughout the entire process, and the accuracy can achieve a μ-level repeatability of 0.002mm. Compared with traditional hydraulic cylinder drives, it solves the problem of environmental pollution, increases speed by 80%, and significantly improves the repeatability of the slider core. Furthermore, in this utility model, the drive plate and the support fixing seat slide through a ball bearing guide rail and a ball bearing slider, and the sliding form is rolling friction, which avoids friction surface scratches and prevents the mold core-pulling device from jamming. Therefore, it does not increase the mold maintenance time and ensures the mold production efficiency. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of this utility model;

[0020] Figure 2 This is a partial sectional view of the present invention.

[0021] Explanation of reference numerals in the attached figures:

[0022] 10. Base assembly; 11. Drive component fixing seat; 111. First through hole; 12. Support fixing seat; 121. Second through hole; 122. Cavity; 123. Third through hole; 124. Sliding hole; 20. Drive component; 30. Linear motion mechanism; 31. First bearing; 32. Second bearing; 33. Bearing pressure block; 34. Limiting block; 35. Lead screw; 36. Coupling; 37. Nut assembly; 371. Ball nut; 372. Nut bracket; 38. Connecting plate; 39. Drive plate; 40. Core pulling assembly; 41. Slider seat; 42. Slider core; 43. Connecting block; 50. Ball guide rail. Detailed Implementation

[0023] To make the technical means, creative features, objectives and effects of this utility model easy to understand, the following embodiments are described in detail with reference to the accompanying drawings.

[0024] Example

[0025] Figure 1 This is a structural schematic diagram of the present invention. Figure 2 This is a partial sectional view of the present invention.

[0026] like Figure 1 and Figure 2 As shown, this embodiment provides a servo-driven core-pulling device applied to injection molds, including a base assembly 10, a drive component 20, a linear motion mechanism 30, and a core-pulling assembly 40.

[0027] like Figure 1 and Figure 2 As shown, the base assembly 10 includes a drive member fixing seat 11 and a support fixing seat 12. The drive member fixing seat 11 has a first through hole 111 through which the output end of the drive member 20 passes. The support fixing seat 12 is located on one end of the drive member fixing seat 11. The support fixing seat 12 has, from left to right, a second through hole 121 communicating with the first through hole 111, a cavity 122 communicating with the second through hole 121, and a third through hole 123 communicating with the cavity 122. The top wall of the support fixing seat 12 has a sliding hole 124 communicating with the cavity 122.

[0028] like Figure 1 and Figure 2 As shown, the driving component 20 is disposed on the other end of the driving component fixing base 11. The driving component 20 is preferably a servo motor.

[0029] like Figure 1 and Figure 2 As shown, the linear motion mechanism 30 is mounted on the support base 12 and connected to the output end of the drive member 20, used to convert the rotation of the output end of the drive member 20 into linear motion. The linear motion mechanism 30 can be a ball screw mechanism, trapezoidal screw mechanism, or planetary screw mechanism, or any other mechanism capable of converting the rotation of the output end of the drive member into linear motion.

[0030] In this embodiment, the linear motion mechanism 30 is preferably a ball screw mechanism, including a first bearing 31, a second bearing 32, a fixing and limiting assembly, a screw 35, a coupling 36, a nut assembly 37, a connecting plate 38, and a drive plate 39. The first bearing 31 is disposed in the first through hole 111, and the second bearing 32 is disposed in the second through hole 121. The fixing and limiting assembly includes an annular bearing pressure block 33 and a limiting block 34. The bearing pressure block 33 is disposed at the opening of the second through hole 121 for fixing the second bearing 32. The limiting block 34 is disposed on the bearing pressure block 33 and is coaxially arranged with the bearing pressure block 33. The screw 35 includes rotating parts located at both ends and a middle part. The lead screw has a rotating part at one end that passes through the first bearing 31 and a rotating part at the other end that passes through the second bearing 32. One end of the lead screw 35 is connected to the output end of the drive member 20 via a coupling 36, and the other end is rotatably located in the limiting block 34. The nut assembly 37 includes a ball nut 371 and a nut bracket 372. The ball nut 371 is sleeved on the lead screw 35 and cooperates with the lead screw. The nut bracket 372 is sleeved on the ball nut 371, and the four outer walls of the nut bracket 372 are all flat. The connecting plate 38 is disposed on the nut bracket 372 and is located in the sliding hole 124. The drive plate 39 is U-shaped, and the inner wall of its top is connected to the top wall of the connecting plate 38.

[0031] In this embodiment, the length of the rotating part of the lead screw 35 is not greater than the length of the sliding hole 124, ensuring that the connecting plate 38 on the nut assembly 37 will not hit the inner walls at both ends of the sliding hole 124.

[0032] In this embodiment, the lead screw portions at both ends of the lead screw 35 are interference-fitted with the first bearing 31 and the second bearing 32.

[0033] In this embodiment, ball bearing guides 50 are provided on the top wall of the supporting base 12 on both sides of the sliding hole 124. A U-shaped slider is provided on the inner wall of the top of the drive plate 39, corresponding to the position of the ball bearing guide 50. The slider is sleeved on the outer periphery of the corresponding ball bearing guide 50, and balls are provided between the slider and the ball bearing guide 50, allowing the slider to slidably rest on the corresponding ball bearing guide 50. Specifically, grooves for ball bearing rolling are provided on both outer walls of the ball bearing guide 50, and grooves for ball bearing rolling are also provided on the inner wall of the slider relative to the outer walls of the ball bearing guide 50, so that the slider slides on the guide rail in a rolling friction manner.

[0034] like Figure 1 and Figure 2 As shown, the core-pulling assembly 40 includes a slider seat 41, a slider core 42, and a connecting block 43. The slider seat 41 is mounted on the linear motion mechanism 30, the slider core 42 is mounted on the right side wall of the slider seat 41, and the connecting block 43 is mounted on the slider seat 41. The top wall of the connecting block 43 has multiple mounting holes. In use, this invention can be fixed to the standard platform of an injection mold system via the connecting block 43.

[0035] The role and effect of the embodiments

[0036] The servo-driven core-pulling device for injection molds described in this invention, through a servo drive and linear motion mechanism, enables long-stroke core-pulling. Since the movement of the slider core is controlled by the servo drive, the speed can be customized throughout the process, achieving a repeatability accuracy of 0.002mm (μm). Compared to traditional hydraulic cylinder drives, this device solves environmental pollution problems, increases speed by 80%, and significantly improves the repeatability accuracy of the slider core, making it suitable for GMP cleanrooms. Furthermore, the drive plate and the support base slide via ball bearing guides and ball bearing sliders, using rolling friction to prevent scratches on the friction surfaces and avoid jamming of the core-pulling device. This prevents increased mold maintenance time and ensures high production efficiency.

[0037] The above embodiments are preferred embodiments of this utility model and are not intended to limit the scope of protection of this utility model.

Claims

1. A servo-driven core-pulling device applied to injection molds, characterized in that, include: Base assembly, drive unit, linear motion mechanism, and core-pulling assembly, The base assembly includes a drive component fixing seat and a support fixing seat. The drive component fixing seat has a first through hole for the output end of the drive component to pass through. The support fixing seat is located on one end of the drive component fixing seat. The interior of the support fixing seat, from left to right, has a second through hole communicating with the first through hole, a cavity communicating with the second through hole, and a third through hole communicating with the cavity. The top wall of the support fixing seat has a sliding hole communicating with the cavity. The driving component is located on the other end of the driving component fixing base. The linear motion mechanism is mounted on the support and fixed base and connected to the output end of the drive component, used to convert the rotation of the output end of the drive component into linear motion. The core-pulling assembly includes a slider seat, a slider core, and a connecting block. The slider seat is disposed on the linear motion mechanism, the slider core is disposed on the right side wall of the slider seat, and the connecting block is disposed on the slider seat. The top wall of the connecting block is provided with multiple mounting holes.

2. The servo-driven core-pulling device applied to injection molds according to claim 1, characterized in that: in, The linear motion mechanism is a ball screw mechanism, including a first bearing, a second bearing, a fixing and limiting assembly, a screw, a coupling, a nut assembly, a connecting plate, and a drive plate. The first bearing is disposed in the first through hole, and the second bearing is disposed in the second through hole. The fixing and limiting assembly includes an annular bearing pressure block and a limiting block. The bearing pressure block is disposed at the opening of the second through hole for fixing the second bearing. The limiting block is disposed on the bearing pressure block and is coaxially arranged with the bearing pressure block. The screw includes rotating parts at both ends and a screw part in the middle, with one end rotating... The first end of the lead screw passes through the first bearing, and the other end of the rotating part passes through the second bearing. One end of the lead screw is connected to the output end of the drive component through the coupling, and the other end is rotatably located within the limiting block. The nut assembly includes a ball nut and a nut bracket. The ball nut is sleeved on the lead screw and cooperates with the lead screw part. The nut bracket is sleeved on the ball nut, and the four outer walls of the nut bracket are all flat. The connecting plate is disposed on the nut bracket and is located within the sliding hole. The drive plate is U-shaped, and its top inner wall is connected to the top wall of the connecting plate.

3. The servo-driven core-pulling device applied to injection molds according to claim 2, characterized in that: in, The top wall of the support fixing seat is provided with ball guide rails on both sides of the sliding hole. The inner wall of the top of the drive plate is provided with a U-shaped slider corresponding to the position of the ball guide rail. The slider is sleeved on the outer periphery of the corresponding ball guide rail, and there are balls between the slider and the ball guide rail, so that the slider can be slidably disposed on the corresponding ball guide rail.

4. The servo-driven core-pulling device applied to injection molds according to claim 2, characterized in that: in, The lead screw sections at both ends of the lead screw are interference-fitted with the first bearing and the second bearing.

5. The servo-driven core-pulling device applied to injection molds according to claim 1, characterized in that: in, The driving component is a servo motor.

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