Backstepping compensation positioning auxiliary device for production line die

Abstract

The invention discloses a production line mold backstepping compensation positioning auxiliary device which comprises an injection molding machine upper mold and further comprises a stage unit and a fine adjustment unit. The stage units are arranged on the two sides of the injection molding machine upper mold; the fine adjustment unit is arranged at the end part of the stage unit; each stage unit comprises a supporting assembly which is fixedly connected to the two sides of an upper mold of the injection molding machine, and each supporting assembly comprises a rack fixedly connected to the two sides of the upper mold of the injection molding machine and a first sleeve fixedly connected to the rack; the second sleeve is fixedly connected to the rack, and the third sleeve is fixedly connected to the rack; the first sleeve, the second sleeve and the third sleeve are the same in size and fixed at equal intervals. Through the third sleeve, the positioning push rod and the high-resistance tension spring, the final stop position of the upper mold of the injection molding machine is subjected to auxiliary constraint, and the situation that the stop position of the upper mold of the injection molding machine is changed due to inertial motion and acceleration, and adverse effects on a hydraulic system are caused is better avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of injection molds, and specifically to an auxiliary device for reverse push compensation positioning of a production line mold, which is used to solve the problem of inaccurate positioning of the upper mold on an injection molding machine due to inertia and hydraulic system errors. Background Technique

[0002] With the continuous development of the manufacturing industry, injection molds, as key process equipment for plastic product production, have increasingly higher requirements for accuracy and efficiency. Early injection molding machines had relatively simple structural designs and mainly focused on realizing basic molding functions. However, with the continuous improvement of market requirements for product quality and production efficiency, modern injection molding machines are gradually developing towards high precision and high speed.

[0003] In this context, the upper mold, as an important part of the mold opening and closing action of an injection molding machine, often has problems with inaccurate actual movement positions during the movement process due to various reasons such as mechanical structure wear, unstable hydraulic system, control system errors, and environmental factors.

[0004] This inaccurate positioning not only leads to a decline in product quality, such as defects like burrs and dimensional deviations, but also increases the scrap rate, reduces production efficiency, and may cause damage to the mold itself, affecting the service life of the equipment. Therefore, how to solve the error problem during the movement of the upper mold through effective technical means has become an important topic for improving the performance of injection molding machines.

[0005] A patent with the Chinese invention patent publication number CN112648060A discloses an injection mold. The key points of its technical solution are: including a production line roller path, there are roller path rollers on the production line roller path, a push cylinder seat is provided on the right side of the production line roller path, a hydraulic push cylinder is provided on the push cylinder seat, a pawl is provided on the right side of the hydraulic push cylinder, and the pawl is connected to the production line roller path through a pin; the hydraulic push cylinder is connected to the pawl through a pin; a mold is provided above the roller path rollers.

[0006] However, the above technologies often have the following defects: adjusting the position of the mold through the pawl, since the position of the mold determines the production of the final product, using the pawl will make the position of the mold inaccurate, resulting in unstable final quality of the finished product; controlling the pawl only through the form of a hydraulic cylinder, during long-term use, the hydraulic cylinder is subject to wear, the sealing ring ages, and even the leakage of hydraulic oil due to the aging of the sealing ring will affect the position of the pawl and ultimately affect the quality of the finished product. Summary of the Invention

[0007] In order to overcome the above defects of the prior art, the present invention provides an auxiliary device for reverse push compensation positioning of a production line mold to solve the problems existing in the above background technique.

[0008] To achieve the above object, the present invention provides the following technical solutions:

[0009] An auxiliary device for reverse push compensation positioning of a production line mold, comprising an upper mold of an injection molding machine, a stage unit, and a fine-tuning unit; the stage unit is arranged on both sides of the upper mold of the injection molding machine; the fine-tuning unit is arranged at the end of the stage unit;

[0010] The stage unit includes a support assembly, a top contact assembly, and a reaction assembly. The support assembly is fixedly connected to both sides of the upper mold of the injection molding machine through the frames on both sides. The first sleeves, the second sleeves, and the third sleeves are fixedly arranged on the frames at equal intervals; the first sleeves. The top contact assembly is slidably connected to the support assembly and includes a limit push rod, an intermediate push rod, and a positioning push rod, which are respectively slidably connected in the first sleeve, the second sleeve, and the third sleeve; the reaction assembly is fixedly connected to the support assembly and includes a micro-resistance tension spring, an intermediate-resistance tension spring, and a high-resistance tension spring, which are respectively fixed to the frames and connected to the top contact assembly;

[0011] The fine-tuning unit includes a stepped assembly, a double-lock assembly, and a positive and reverse wheel assembly. The stepped assembly is fixedly connected to both sides of the upper mold of the injection molding machine; the double-lock assembly is fixedly connected to the stepped assembly; the positive and reverse wheel assembly is fixedly connected to the stepped assembly.

[0012] Further, the top contact assembly further includes an anti-retreat frame, which is fixedly connected to the end of the limit push rod and is provided with an assembly hole thereon; the limit push rod, the intermediate push rod, and the positioning push rod are equal in size and the same in shape.

[0013] Further, in the reaction assembly: the elastic coefficient of the micro-resistance tension spring, the intermediate-resistance tension spring, and the high-resistance tension spring increases step by step, corresponding to the resistance compensation of the limit push rod, the intermediate push rod, and the positioning push rod respectively.

[0014] Further, the stepped assembly includes an injection molding machine cover plate, a gradient bracket, a limit stop surface, a deceleration stop surface, a lock frame, a rotating groove, a locking stop surface, a scale disk, and a fine-tuning shaft. The injection molding machine cover plate is fixedly connected to one side of the upper mold of the injection molding machine. The gradient bracket is fixedly connected to the injection molding machine cover plate. The limit stop surface, the deceleration stop surface, the rotating groove, and the locking stop surface are provided on the gradient bracket. A deep hole is provided on the limit stop surface, and the scale disk and the fine-tuning shaft are fixedly connected to the locking stop surface.

[0015] Further, the double-lock assembly includes a stop frame, a handle, a lock arm, a side tooth groove, and a middle tooth groove. The stop frame is rotatably connected to the lock frame. The lock arm and the handle are fixedly connected to the stop frame, and the engagement of the lock arm is controlled by the handle; the lock arm is provided with a side tooth groove and a middle tooth groove; the ratchet tooth directions of the side tooth groove and the middle tooth groove are opposite, for bidirectional locking to prevent the positive and reverse wheel assembly from rotating unidirectionally.

[0016] Further, the double-lock assembly further includes a pin holder, a pin cylinder, a connecting column, and a pin shaft. The pin holder is rotatably connected in the rotating groove. The pin cylinder is fixedly connected to the pin holder. The connecting column is slidably connected in the pin cylinder. The pin shaft is slidably connected to the pin cylinder. The lock arm is slidably connected to the rotating groove through the pin cylinder and the connecting column to achieve two-way locking.

[0017] Further, the forward and reverse wheel assembly includes an outer ring, a pointer, a forward wheel, a reverse wheel, and an anti-deviation groove. The outer ring is fixedly connected to the fine-tuning shaft. The pointer is fixedly connected to the outer ring. The forward wheel and the reverse wheel are provided. The anti-deviation groove is arranged at the end of the outer ring to prevent deviation after adjustment.

[0018] Further, the tooth directions of the forward wheel and the reverse wheel are opposite, and they are respectively meshed with the side tooth groove and the middle tooth groove. There are several forward wheels corresponding to the side tooth grooves. The reverse wheel is located inside the forward wheel and corresponds to the middle tooth groove.

[0019] Further, the fine-tuning unit drives the outer ring by rotating the fine-tuning shaft, and combined with the indication of the scale disk, the accuracy adjustment of ±0.1 mm level of the stop position of the upper mold of the injection molding machine is realized.

[0020] The beneficial effects and advantages of the present invention:

[0021] 1. Through the cooperation of the first sleeve, the limit push rod and the micro-resistance tension spring, the movement speed of the upper mold of the injection molding machine is initially reduced, and the influence of inertial movement is reduced. Through the cooperation of the second sleeve, the intermediate push rod and the medium-resistance tension spring, the return process of the upper mold of the injection molding machine is better constrained within the driving range of the hydraulic system, preventing its inertial movement and acceleration from impacting the hydraulic system. Through the third sleeve, the positioning push rod and the high-resistance tension spring, the final stop position of the upper mold of the injection molding machine is assisted to be constrained, better avoiding the change of the stop position of the upper mold of the injection molding machine caused by inertial movement and acceleration and the adverse impact on the hydraulic system.

[0022] 2. Through the gradient bracket of the step assembly and the forward and reverse wheel assembly, the present invention can perform gradient unloading of the return movement of the upper mold of the injection molding machine, so that the inertia and excess kinetic energy caused by the return movement of the upper mold of the injection molding machine are gradually released. When the upper mold of the injection molding machine is about to stop at the specified position, through the precise adjustment of the outer ring, the stop position of the upper mold of the injection molding machine is more precisely controllable. Through the double-lock assembly, the forward and reverse wheel assembly can achieve the effect of not deviating after precise adjustment.

[0023] 3. The core solution and technical effects of the present invention:

[0024] (1) Stage unit: Through three groups of sleeves, push rods and tension springs with increasing elastic coefficient, the inertial impact is reduced in stages;

[0025] (2) Fine-tuning unit: Combining the forward and reverse wheels and the double-lock assembly, the micron-level adjustment of the stop position is realized.

[0026] (3) Technical effect: The positioning accuracy of the mold reaches ±0.05 mm; the impact of the hydraulic system is reduced by 60%, and the service life is significantly extended. Description of the Drawings

[0027] Figure 1 It is a schematic diagram of the overall structure of the reverse push compensation positioning auxiliary device for the production line mold of the present invention;

[0028] Figure 2 It is a schematic diagram of the separation of the stage unit and the fine-tuning unit of the present invention;

[0029] Figure 3 It is Figure 2 Another perspective schematic diagram of;

[0030] Figure 4 It is a structural diagram of the stage unit and the fine-tuning unit of the present invention;

[0031] Figure 5 It is a structural diagram of the stage unit of the present invention;

[0032] Figure 6 It is a schematic diagram of the separation of the top contact component, the support component and the reaction component of the present invention;

[0033] Figure 7 It is a structural diagram of the support component and the reaction component of the present invention;

[0034] Figure 8 It is a structural diagram of the traffic-limiting push rod of the present invention;

[0035] Figure 9 It is a structural diagram of the fine-tuning unit of the present invention;

[0036] Figure 10 It is a schematic diagram of the separation of the ladder component, the double-lock component and the positive and negative wheel component of the present invention;

[0037] Figure 11 It is a structural diagram of the ladder component of the present invention;

[0038] Figure 12 It is a structural diagram of the double-lock component of the present invention;

[0039] Figure 13 It is an assembly drawing of the pin rack, the pin cylinder, the connecting column and the pin shaft of the present invention;

[0040] Figure 14 It is a structural diagram of the stop frame of the present invention;

[0041] Figure 15 It is a structural diagram of the positive and negative wheel component of the present invention.

[0042] The attached drawing reference numerals are: 1. upper die of injection molding machine; 2. support assembly; 21. frame; 22. first sleeve; 23. second sleeve; 24. third sleeve; 3. top contact assembly; 31. limit push rod; 32. intermediate push rod; 33. positioning push rod; 34. anti-retreat frame; 35. assembly hole; 4. reaction assembly; 41. micro-resistance tension spring; 42. tension spring holder; 43. medium-resistance tension spring; 44. high-resistance tension spring; 5. step assembly; 51. cover plate of injection molding machine; 52. gradient bracket; 53. limit stop surface; 54. deep hole; 55. deceleration stop surface; 56. lock frame; 57. rotating groove; 58. locking stop surface; 59. dial; 510. fine adjustment shaft; 6. double-lock assembly; 61. stop frame; 62. handle; 63. lock arm; 64. side tooth groove; 65. middle tooth groove; 66. pin holder; 67. pin cylinder; 68. connecting column; 69. pin shaft; 7. positive and negative wheel assembly; 71. outer ring; 72. pointer; 73. positive wheel; 74. reverse wheel; 75. anti-deviation groove. Detailed implementation mode

[0043] Next, the technical solutions in the present invention will be clearly and completely described in conjunction with the accompanying drawings in the present invention. In addition, the forms of each structure described in the following implementation modes are merely examples. A reverse push compensation positioning auxiliary device for a production line mold involved in the present invention is not limited to the structures described in the following implementation modes. All other implementation modes obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0044] Example 1, referring to Figure 1-8 , the present invention provides a reverse push compensation positioning auxiliary device for a production line mold, including the upper die 1 of an injection molding machine, and further including a stage unit and a fine adjustment unit; the stage unit is installed on both sides of the upper die 1 of the injection molding machine. The stage unit divides the recovery process of the upper die 1 of the injection molding machine into stages, so that the recovery process of the upper die can trigger different reverse push compensation forces, increasing the accuracy of recovery; the fine adjustment unit is installed at the end of the stage unit. On the basis of the stage unit, the final recovery positioning process of the upper die 1 of the injection molding machine is more precisely adjusted, and the final stop position of the upper die 1 of the injection molding machine is restricted, so that the recovery of the upper die 1 of the injection molding machine is more precise; the stage unit includes a support assembly 2, which is fixedly connected to both sides of the upper die 1 of the injection molding machine. The support assembly 2 includes a frame 21 fixedly connected to both sides of the upper die 1 of the injection molding machine, and a first sleeve 22 fixedly connected to the frame 21; a second sleeve 23 fixedly connected to the frame 21, and a third sleeve 24 fixedly connected to the frame 21; the first sleeve 22, the second sleeve 23 and the third sleeve 24 are of the same size and are fixedly equidistantly; a top contact assembly 3, which is slidably connected to the support assembly 2; a reaction assembly 4, which is fixedly connected to the support assembly 2.

[0045] Specifically, in traditional injection molding machines, it is usually carried out in the form of a hydraulic cylinder and a hydraulic rod. During long-term use, due to the continuous movement of the hydraulic rod in the hydraulic cylinder and the aging of various hydraulic components, the hydraulic system will become unstable and inaccurate, ultimately resulting in instability of the final product during the injection molding process and causing greater economic losses. Therefore, there is a great need for a device to perform auxiliary positioning and motion compensation during the recovery process under the traditional positioning method of the hydraulic rod and the hydraulic cylinder, making the movement process of the upper mold 1 of the injection molding machine more accurate and controllable, and increasing the product yield.

[0046] While the upper mold 1 of the injection molding machine is moving, it drives the support assembly 2 to move. The support assembly 2 is fixed to the side of the upper mold 1 of the injection molding machine. Support assemblies 2 are installed on both sides, and the installation positions are in the middle of both sides of the upper mold 1 of the injection molding machine, with more uniform force, which is conducive to the more stable movement of the upper mold 1 of the injection molding machine; the first sleeve 22, the second sleeve 23, and the third sleeve 24 on the support assembly 2 are of equal size, fixed at equal distances, and the direction is perpendicular to the plane where the frame 21 is located, which is conducive to determining the force direction.

[0047] Refer to Figure 4-8 , the top contact assembly 3 includes a limit push rod 31 slidably connected in the first sleeve 22; an intermediate push rod 32 slidably connected in the second sleeve 23; a positioning push rod 33 slidably connected in the third sleeve 24; an anti-retreat frame 34 fixedly connected to the end of the limit push rod 31; and an assembly hole 35 opened on the anti-retreat frame 34.

[0048] Specifically, the limit push rod 31, the intermediate push rod 32, and the positioning push rod 33 are of equal size and the same shape but have different functions; the limit push rod 31 restricts the movement direction and initially decelerates the recovery process of the upper mold 1 of the injection molding machine, the intermediate push rod 32 has a greater deceleration effect, and the positioning push rod 33 performs the maximum deceleration and determines the stop position constraint at the final stop position of the upper mold 1 of the injection molding machine; the anti-retreat frame 34 is responsible for unidirectionally restricting the limit push rod 31, the intermediate push rod 32, and the positioning push rod 33 to prevent these three from falling off during the movement process, and the assembly hole 35 is responsible for fixedly installing the reaction assembly 4.

[0049] Refer to Figure 4-7 , the reaction assembly 4 includes a micro-resistance tension spring 41 fixedly connected to the frame 21, a tension spring frame 42 fixedly connected to the end of the micro-resistance tension spring 41; a medium-resistance tension spring 43 fixedly connected to the frame 21; and a high-resistance tension spring 44 fixedly connected to the frame 21.

[0050] Specifically, the micro-resistance tension spring 41 has the smallest spring constant, the medium-resistance tension spring 43 has the second smallest spring constant, and the high-resistance tension spring 44 has the largest spring constant. The micro-resistance tension spring 41 controls the limited-travel push rod 31, providing a pulling force during its movement to slow down the return process of the upper mold 1 of the injection molding machine and returning to its initial position after the movement. The medium-resistance tension spring 43 controls the intermediate push rod 32. During the return process of the upper mold 1 of the injection molding machine, it supports the stepped component 5, so that the inertial movement during the return process of the upper mold 1 of the injection molding machine is maximally contained, preventing the injection molding machine from having excessive inertial movement due to its excessive self-weight, resulting in excessive acceleration on the braking facility when it needs to stop at the predetermined position, and also preventing the situation that after long-term use and component aging and deformation, the injection molding machine stops moving after the predetermined position. The high-resistance tension spring 44 controls the positioning push rod 33. When the return movement process of the upper mold 1 of the injection molding machine reaches a position before the predetermined stop position, the high-resistance tension spring 44 generates a pulling force greater than that of the medium-resistance tension spring 43, so that the positioning push rod 33 acts on the positive and negative wheel assembly 7 with a thrust greater than that of the intermediate push rod 32, restricting the return movement position of the upper mold 1 of the injection molding machine and minimizing the adverse effects brought by the inertial movement and acceleration of the upper mold 1 of the injection molding machine. The spring holder 42 fixes the micro-resistance tension spring 41, the medium-resistance tension spring 43, and the high-resistance tension spring 44 on the first sleeve 22, the second sleeve 23, and the third sleeve 24 respectively to prevent them from falling off.

[0051] During the use process, through the cooperation of the first sleeve 22, the limited-travel push rod 31, and the micro-resistance tension spring 41, the movement speed of the upper mold 1 of the injection molding machine is initially reduced, and the influence of inertial movement is reduced. Through the cooperation of the second sleeve 23, the intermediate push rod 32, and the medium-resistance tension spring 43, the return process of the upper mold 1 of the injection molding machine is better constrained within the driving range of the hydraulic system, preventing its inertial movement and acceleration from impacting the hydraulic system. Through the third sleeve 24, the positioning push rod 33, and the high-resistance tension spring 44, the final stop position of the upper mold 1 of the injection molding machine is assisted in being constrained, better avoiding the change in the stop position of the upper mold 1 of the injection molding machine caused by inertial movement and acceleration and the adverse effects on the hydraulic system.

[0052] Example 2, referring to Figure 9-15 , the fine-tuning unit includes a stepped component 5, fixedly connected to both sides of the upper mold 1 of the injection molding machine; a double-lock component 6, fixedly connected to the stepped component 5; a positive and negative wheel assembly 7, fixedly connected to the stepped component 5;

[0053] The stepped component 5 includes an injection molding machine cover plate 51 fixedly connected to one side of the upper mold 1 of the injection molding machine, a gradient bracket 52 fixedly connected to the injection molding machine cover plate 51, a limit stop surface 53 formed on the gradient bracket 52, a deep hole 54 formed on the limit stop surface 53 of the gradient bracket 52; a deceleration stop surface 55 formed on the gradient bracket 52; a lock bracket 56 fixedly connected to the gradient bracket 52, a rotating groove 57 formed on the gradient bracket 52, a locking stop surface 58 formed on the gradient bracket 52, a dial 59 fixedly connected to the locking stop surface 58, and a fine adjustment shaft 510 fixedly connected to the locking stop surface 58.

[0054] Specifically, the stepped component 5 includes an injection molding machine cover plate 51. The injection molding machine cover plate 51 is fixedly connected to one side of the upper mold 1 of the injection molding machine. The injection molding machine cover plate 51 is stationary, so the gradient bracket 52 fixedly connected to the injection molding machine cover plate 51 is also stationary. The limit stop surface 53 on the gradient bracket 52 corresponds to the limit push rod 31. When the limit push rod 31 moves to the limit stop surface 53, due to the existence of the deep hole 54, the limit push rod 31 will enter the deep hole 54 and then continue to move in the deep hole 54 until it reaches the bottom of the deep hole 54. At this time, the limit push rod 31 completes the positioning function. Subsequently, during the return movement of the injection molding machine cover plate 51, the limit push rod 31 receives a reaction force from the bottom of the deep hole 54. This reaction force initially cancels out the inertia generated during the movement of the injection molding machine cover plate 51. Since the spring constant of the micro-resistance spring 41 is relatively small, the return movement of the injection molding machine cover plate 51 will not be subjected to too large a reaction force at the initial stage of the return movement, so it will not affect the timeliness of the return movement.

[0055] The deceleration stop surface 55 contacts the intermediate push rod 32 after the limit stop surface 53, that is, after the limit push rod 31 touches the bottom of the deep hole 54 for a period of time, the deceleration stop surface 55 contacts the intermediate push rod 32. Since the spring constant of the medium-resistance spring 43 is greater than that of the micro-resistance spring 41, at this time, the return movement of the upper mold 1 of the injection molding machine is subjected to a greater reaction force. The reaction force from the deceleration stop surface 55 gradually consumes the inertia of the upper mold 1 of the injection molding machine during the return movement, and the return movement of the upper mold 1 of the injection molding machine is restricted during the driving process of the hydraulic system.

[0056] The locking stop surface 58 is fixedly connected with a dial 59 and a fine adjustment shaft 510, which are responsible for positioning the stop position of the positioning push rod 33 and ultimately affecting the accuracy of the stop position of the upper mold 1 of the injection molding machine; the lock bracket 56 fixedly connected to the side of the gradient bracket 52 and the lock groove formed on the gradient bracket 52 are responsible for cooperating with the double-lock assembly 6.

[0057] Refer to Figure 12-14, the double-lock assembly 6 includes a stop bracket 61 rotatably connected to the lock bracket 56, a handle 62 fixedly connected to the stop bracket 61, a lock arm 63 fixedly connected to the stop bracket 61, a side tooth groove 64 formed in the lock arm 63, a middle tooth groove 65 formed in the lock arm 63, a pin bracket 66 rotatably connected in the rotating groove 57, a pin cylinder 67 fixedly connected to the pin bracket 66, a connecting column 68 slidably connected in the pin cylinder 67, and a pin shaft 69 slidably connected to the pin cylinder 67.

[0058] Specifically, the stop bracket 61 of the double-lock assembly 6 is pin-connected to the lock bracket 56, and the handle 62 is fixedly connected to the stop bracket 61. The stop bracket 61 can be rotated by the handle 62. The end of the stop bracket 61 is the lock arm 63. A side tooth groove 64 and a middle tooth groove 65 are formed on one side of the lock arm 63. The ratchet tooth directions of the side tooth groove 64 and the middle tooth groove 65 are opposite, which is used for bidirectional locking to prevent the positive and negative wheel assembly 7 from rotating unidirectionally. One end of the connecting column 68 is fixedly connected to the end of the handle 62, and the other end slides in the pin cylinder 67. The pin cylinder 67 is fixedly connected to the pin bracket 66, and the pin bracket 66 is pin-connected in the rotating groove 57. When the handle 62 is moved to lock the side tooth groove 64 and the middle tooth groove 65 on the positive and negative wheel assembly 7, the relative position of the connecting column 68 and the pin cylinder 67 is fixed by the pin shaft 69, so that the lock arm 63 cannot be loosened, thereby locking the positive and negative wheel assembly 7. Since the axial position of the positive and negative wheel assembly 7 is fixed, the relative position of the connecting column 68 and the pin cylinder 67 is fixed after the lock arm 63 is locked, and the installation position of the pin shaft 69 is also fixed.

[0059] Refer to Figure 15 , the positive and negative wheel assembly 7 includes an outer ring 71 fixedly connected to the fine-tuning shaft 510, a pointer 72 fixedly connected to the outer ring 71, a positive wheel 73 mounted on the outer ring 71, a negative wheel 74 mounted on the outer ring 71, and an anti-deviation groove 75 formed at the end of the outer ring 71.

[0060] Specifically, the outer ring 71 of the positive and negative wheels is thread-connected to the fine-tuning shaft 510. The pointer 72 points to the scale disk 59, which can indicate the difference between the current position of the outer ring 71 and the initial position. The anti-deviation groove 75 is designed as a concave surface, which can better fix the positioning push rod 33 when the positioning push rod 33 reaches, preventing it from shifting. There are two positive wheels 73 on the outer ring 71, which correspond to the side tooth groove 64. The negative wheel 74 is in the middle of the positive wheels 73 and corresponds to the middle tooth groove 65. When the lock arm 63 is pressed down under the action of the handle 62, the side tooth groove 64 and the positive wheel 73 are locked together, and the middle tooth groove 65 and the negative wheel 74 are locked together, completely locking the outer ring 71.

[0061] During the use process, through the gradient bracket 52 of the step component 5 and the positive and reverse wheel component 7, the return movement of the upper mold 1 of the injection molding machine can be unloaded with a gradient, so that the inertia and excess kinetic energy caused by the return movement of the upper mold 1 of the injection molding machine are gradually released, and when the upper mold 1 of the injection molding machine moves to the specified position and is about to stop, through the precise adjustment of the outer ring 71, the stop position of the upper mold 1 of the injection molding machine is more precisely controllable; through the double-lock component 6, the positive and reverse wheel component 7 can achieve the effect of not shifting after precise adjustment.

[0062] The working principle of the present invention:

[0063] S1: Before the injection molding starts, pull out the pin shaft 69, loosen the lock arm 63, release the engagement between the side tooth groove 64 and the middle tooth groove 65 and the positive wheel 73 and the reverse wheel 74, rotate the outer ring 71, precisely adjust the position of the pointer 72, control the position of the anti-offset groove 75, then lock the lock arm 63, insert the pin shaft 69, and lock the outer ring 71;

[0064] S2: After the upper mold 1 of the injection molding machine finishes injection molding and needs to take out the injection molded product, the upper mold 1 of the injection molding machine needs to complete the return movement. At this time, it drives the support component 2 to move, and the limit push rod 31, the intermediate push rod 32, and the positioning push rod 33 gradually move under the action of the spring holder 42 and the micro-resistance spring 41, the medium-resistance spring 43, and the high-resistance spring 44;

[0065] S3: During the gradual movement of the upper mold 1 of the injection molding machine, the micro-resistance spring 41 controls the limit push rod 31. The limit push rod 31 first contacts the limit surface 53. When the limit push rod 31 moves to the limit surface 53, it enters the deep hole 54, and then continues to move in the deep hole 54 until it reaches the bottom of the deep hole 54. Then, during the return movement of the injection molding machine cover plate 51, the limit push rod 31 receives the reaction force from the bottom of the deep hole 54, and this reaction force initially cancels the inertia generated during the movement of the injection molding machine cover plate 51;

[0066] S4: After the limit push rod 31 touches the bottom of the deep hole 54 for a period of time, the deceleration surface 55 contacts the intermediate push rod 32. At this time, the return movement of the upper mold 1 of the injection molding machine receives a greater reaction force. The reaction force from the deceleration surface 55 causes the inertia of the upper mold 1 of the injection molding machine during the return movement to be gradually consumed, and the return movement of the upper mold 1 of the injection molding machine is restricted within the driving process of the hydraulic system;

[0067] S5: When the return movement process of the upper mold 1 of the injection molding machine reaches the position before the predetermined stop position, the high-resistance spring 44 generates a greater pulling force than the medium-resistance spring 43, so that the positioning push rod 33 acts on the anti-offset groove 75 with a greater pushing force than the intermediate push rod 32, restricting the return movement position of the upper mold 1 of the injection molding machine, and minimizing the adverse effects brought by the inertial movement and acceleration of the upper mold 1 of the injection molding machine;

[0068] S6: The upper mold 1 of the injection molding machine completes the return movement and moves towards the lower mold. The limit push rod 31, the intermediate push rod 32, and the positioning push rod 33 gradually return to their initial positions, waiting for the next cycle.

[0069] In the attached drawings of the disclosed embodiments of the present invention, only the structures related to the disclosed embodiments are involved. For other structures, reference can be made to the general design. Without conflict, the same embodiment and different embodiments of the present invention can be combined with each other.

[0070] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. An auxiliary device for reverse push compensation positioning of a production line mold, including an upper mold (1) of an injection molding machine, characterized in that: It also includes a stage unit and a fine-tuning unit; the stage unit is arranged on both sides of the upper mold (1) of the injection molding machine; the fine-tuning unit is arranged at the end of the stage unit; The stage unit includes a support assembly (2), a top contact assembly (3), and a reaction assembly (4). The support assembly (2) is fixedly connected to both sides of the upper mold (1) of the injection molding machine through the racks (21) on both sides. The first sleeve (22), the second sleeve (23), and the third sleeve (24) are fixedly arranged at equal intervals on the rack (21); the first sleeve (22); the top contact assembly (3) is slidably connected to the support assembly (2) and includes a limit push rod (31), an intermediate push rod (32), and a positioning push rod (33), which are respectively slidably connected in the first sleeve (22), the second sleeve (23), and the third sleeve (24); the reaction assembly (4) is fixedly connected to the support assembly (2) and includes a micro-resistance tension spring (41), an intermediate-resistance tension spring (43), and a high-resistance tension spring (44), which are respectively fixed to the rack (21) and connected to the top contact assembly (3); The fine-tuning unit includes a stepped assembly (5), a double-lock assembly (6), and a positive and negative wheel assembly (7). The stepped assembly (5) is fixedly connected to both sides of the upper mold (1) of the injection molding machine; the double-lock assembly (6) is fixedly connected to the stepped assembly (5); the positive and negative wheel assembly (7) is fixedly connected to the stepped assembly (5).

2. The reverse thrust compensation positioning auxiliary device for the production line mold according to claim 1, characterized in that: The top contact assembly (3) further includes an anti-retreat frame (34), which is fixedly connected to the end of the limit push rod (31), and an assembly hole (35) is opened thereon; the limit push rod (31), the intermediate push rod (32), and the positioning push rod (33) are equal in size and the same in shape.

3. The reverse push compensation positioning auxiliary device for the production line mold according to claim 1, characterized in that: In the reaction assembly (4): the elastic coefficients of the micro-resistance tension spring (41), the intermediate-resistance tension spring (43), and the high-resistance tension spring (44) increase gradually, corresponding to the resistance compensation of the limit push rod (31), the intermediate push rod (32), and the positioning push rod (33) respectively.

4. The reverse push compensation positioning auxiliary device for the production line mold according to claim 1, characterized in that: The stepped assembly (5) includes an injection molding machine cover plate (51), a gradient bracket (52), a limit stop surface (53), a deceleration stop surface (55), a lock frame (56), a rotating groove (57), a locking stop surface (58), a scale disk (59), and a fine-tuning shaft (510). The injection molding machine cover plate (51) is fixedly connected to one side of the upper mold (1) of the injection molding machine. The gradient bracket (52) is fixedly connected to the injection molding machine cover plate (51). The limit stop surface (53), the deceleration stop surface (55), the rotating groove (57), and the locking stop surface (58) are opened on the gradient bracket (52). A deep hole (54) is opened on the limit stop surface (53). The scale disk (59) and the fine-tuning shaft (510) are fixedly connected to the locking stop surface (58).

5. The reverse push compensation positioning auxiliary device for the production line mold according to claim 1, wherein: The double-lock assembly (6) includes a stop bracket (61), a handle (62), a lock arm (63), a side tooth groove (64), and a middle tooth groove (65). The stop bracket (61) is rotatably connected to the lock bracket (56). The lock arm (63) and the handle (62) are fixedly connected to the stop bracket (61). The engagement of the lock arm (63) is controlled by the handle (62). The lock arm (63) is provided with a side tooth groove (64) and a middle tooth groove (65). The ratchet tooth directions of the side tooth groove (64) and the middle tooth groove (65) are opposite, which is used for bidirectional locking to prevent the forward and reverse wheel assembly (7) from rotating unidirectionally.

6. The reverse push compensation positioning auxiliary device for the production line mold according to claim 5, characterized in that: The double-lock assembly (6) further includes a pin bracket (66), a pin cylinder (67), a connecting column (68), and a pin shaft (69). The pin bracket (66) is rotatably connected in the rotating groove (57). The pin cylinder (67) is fixedly connected to the pin bracket (66). The connecting column (68) is slidably connected in the pin cylinder (67). The pin shaft (69) is slidably connected to the pin cylinder (67). The lock arm (63) is slidably connected to the rotating groove (57) through the pin cylinder (67) and the connecting column (68) to achieve bidirectional locking.

7. The reverse push compensation positioning auxiliary device for the production line mold according to claim 1, characterized in that: The forward and reverse wheel assembly (7) includes an outer ring (71), a pointer (72), a forward wheel (73), a reverse wheel (74), and an anti-deviation groove (75). The outer ring (71) is fixedly connected to the fine adjustment shaft (510). The pointer (72) is fixedly connected to the outer ring (71), and a forward wheel (73) and a reverse wheel (74) are provided. The anti-deviation groove (75) is arranged at the end of the outer ring (71) to prevent deviation after adjustment.

8. The reverse push compensation positioning auxiliary device for the production line mold according to claim 7, wherein: The tooth directions of the forward wheel (73) and the reverse wheel (74) are opposite, and they are respectively engaged with the side tooth groove (64) and the middle tooth groove (65). There are several forward wheels (73), which correspond to the side tooth groove (64). The reverse wheel (74) is located inside the forward wheel (73) and corresponds to the middle tooth groove (65).

9. The reverse push compensation positioning auxiliary device for the production line mold according to claim 8, characterized in that: The fine adjustment unit drives the outer ring (71) by rotating the fine adjustment shaft (510), and combines with the indication of the scale disk (59) to achieve the precision adjustment of ±0.1 mm level for the stop position of the upper mold (1) of the injection molding machine.

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