Electric ejection structure of an injection molding machine

Abstract

The application relates to the technical field of injection molding machines, in particular to an electric shooting structure of an injection molding machine, which comprises an injection molding machine, one side of the injection molding machine comprises a mold, the mold is provided with a sprue, the other side of the injection molding machine comprises a shooting base, a feeding hopper, a cylindrical barrel and a plasticizing servo motor, the output end of the plasticizing servo motor is connected with a screw rod in the barrel, a processing structure is installed at the front end of the barrel, the processing structure is linked with a mechanical counting structure, through the processing structure, the function that the nozzle rotates in one direction when the shooting base moves forward and the nozzle automatically stops rotating when the shooting base retreats is realized, an additional motor or electric control driving is not needed, and only the shooting moving force can make the nozzle continuously and uniformly rotate in the process of close pressing, local long-term pressure wear and indentation of a sealing surface are effectively avoided, glue leakage is prevented from the root, shear force generated by rotation can break the sticking points of the melt, the risk of mold sticking is reduced, cold material, carbon deposition and residual material around the nozzle end face and the sprue can be automatically scraped off, and the self-cleaning effect is realized.

Description

Technical Field

[0001] This invention relates to the field of injection molding machine technology, and more particularly to an electric injection displacement structure for an injection molding machine. Background Technology

[0002] In the prior art, the injection displacement structure of an injection molding machine is mainly used to realize the movement of the injection unit (such as barrel, nozzle) relative to the mold so that the nozzle can contact or separate from the mold gate.

[0003] A search revealed that patent CN216466009U proposes "an electric injection transfer structure for an injection molding machine." This structure includes a front injection transfer guide frame and a rear injection transfer guide frame for mounting the injection molding device. The front and rear injection transfer guide frames are slidably mounted on two linear guide rails. By setting the injection transfer guide frames and guide sleeves, and cooperating with a ball screw and screw nut, with the axis of the injection transfer guide rod and the axis of the ball screw located in the same plane, the reciprocating motion of the ball screw is made more precise, reducing injection deviation and greatly improving injection accuracy and the performance of the injection molding machine.

[0004] However, long-term use of injection molding machines can easily lead to localized wear and deformation of the nozzle end face or gate, which in turn can cause problems such as glue leakage and mold sticking. At the same time, the lack of an automatic mechanical control mechanism to stop the nozzle when it retracts makes it difficult to achieve unidirectional rotation to scrape off cold material and carbon deposits, affecting the stability of the injection molding process and product quality.

[0005] Injection molding machines generally rely on electronic systems for counting molding operations. However, electronic counting is prone to loss or reset when there is a power outage, system crash, parameter reset, or program malfunction. There is a lack of reliable mechanical counting devices independent of the electronic system. This makes it impossible to stably record the actual molding output during production and makes it difficult to establish dual verification with electronic counting, thus reducing the reliability and safety of the production process. Summary of the Invention

[0006] The purpose of this invention is to address the shortcomings of the prior art by proposing an electric injection displacement structure for an injection molding machine.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: an electric injection transfer structure for an injection molding machine, comprising: an injection molding machine, one side of which includes a mold with a gate, the other side of which includes an injection unit, a feed hopper, a cylindrical barrel, and a plasticizing servo motor, the output end of which is connected to a screw inside the barrel, characterized in that a processing structure is installed at the front end of the barrel, the processing structure is linked to a mechanical counting structure, the processing structure includes an extension cylinder rotatably connected to the end of the barrel, a nozzle is fixed to the extension cylinder, a worm gear is fixed to the outside of the extension cylinder, a support rod is fixed to the top of the injection unit, a worm is fixed to one end of the support rod, the worm meshes with the worm gear, a rack is fixed to the top of the injection molding machine via a support column, the injection unit has an opening for accommodating the support column and the rack, a round shaft is rotatably connected to the support rod, a gear is fixed to one end of the round shaft, and a disc is fixed to the other end of the round shaft.

[0008] As a further embodiment of the present invention, a first bent plate is fixed on the support rod, and a hollow column is rotatably connected to the first bent plate. A hollow disk is fixed to one end of the hollow column, and the disk is rotatably disposed inside the hollow disk.

[0009] As a further embodiment of the present invention, the disc has grooves distributed in a circumferential array, and a retaining ball is connected inside the groove by a spring. The inner side of the hollow disc is provided with a ball groove and an inclined groove, which are integral structures, and the retaining ball is located inside the ball groove.

[0010] As a further embodiment of the present invention, a pulley is fixed to one end of the worm gear, a groove is provided on the outside of the hollow column, and the pulley and the groove are connected by a belt.

[0011] As a further embodiment of the present invention, the mechanical counting structure includes a second bent plate fixed on a first bent plate, a first damping shaft fixed at one end of the hollow column, and a small counting disk fixed after the first damping shaft passes through the second bent plate.

[0012] As a further embodiment of the present invention, a second damping shaft is fixed to one end of the second bending plate, a large counting disk is fixed to one end of the second damping shaft, a push block is fixed to the outside of the small counting disk, and a protrusion is fixed to the outside of the large counting disk.

[0013] As a further embodiment of the present invention, a support bar is fixed to the top of the second bending plate, and symmetrical pointers are fixed to the support bar, with the two pointers pointing to the small counting disk and the large counting disk respectively.

[0014] As a further embodiment of the present invention, a drive motor is installed on the top of the injection molding machine and a transverse groove is provided. The injection unit moves along the transverse groove, and a ball screw is rotatably connected to the injection unit. The output end of the drive motor is connected to the ball screw.

[0015] As a further embodiment of the present invention, an auxiliary melting structure is installed on the injection molding machine base. The auxiliary melting structure includes a hollow box fixed to the outer wall of the injection molding machine. Another output end of the drive motor is located inside the hollow box and a first friction block is installed through a flange. A limiting groove is provided at the bottom of the inner cavity of the hollow box. A second friction block is placed inside the hollow box, and the bottom of the second friction block is inserted into the limiting groove. A second spring is connected to the inner wall of the hollow box, and one end of the second spring abuts against the second friction block and is compressed.

[0016] As a further embodiment of the present invention, the barrel is fixed with a main pipe, the main pipe is connected to three forked pipes, the forked pipes are connected to a horn air inlet, and the three forked pipes are located above the plasticizing servo motor and the drive motor and inside the hollow box.

[0017] The electric injection displacement structure for an injection molding machine proposed in this invention has the following advantages:

[0018] 1. Addressing the problems of existing technologies, such as the single contact method between the nozzle and the gate, easy wear and leakage, and lack of rotation control mechanism, this invention achieves a purely mechanical control function by setting up a processing structure composed of gears, racks, worm gears, worm shafts, and one-way transmission components (discs, hollow discs, ball clamps, and inclined grooves). This structure enables the nozzle to rotate unidirectionally when the injection unit moves forward and automatically stop rotating when it moves backward. This structure requires no additional motor or electronic drive; it relies solely on the injection force (fully utilizing injection energy) to ensure continuous and uniform rotation of the nozzle during the bonding and tightening process. This effectively avoids long-term localized pressure wear and depressions on the sealing surface, preventing leakage at its source. Simultaneously, the shearing force generated by rotation can break down molten material adhesion points, reducing the risk of mold sticking, and can automatically scrape away cold material, carbon deposits, and residues from the nozzle end face and around the gate, achieving a self-cleaning effect and significantly improving the stability of the injection molding process and the quality of the molded product.

[0019] 2. Addressing the issues of existing technologies lacking independent and reliable mechanical counting devices and electronic counting being susceptible to power outages, this invention employs a mechanical counting structure comprised of a small counting disk, a large counting disk, a damping shaft, a push block, and a protrusion. Utilizing a unidirectional transmission mechanism, the small counting disk advances one unit with each forward and backward movement of the injection unit. Once ten units are accumulated, the large counting disk advances one unit, thus achieving a linked mechanical cumulative counting. This structure requires no power supply, is independent of the injection molding machine's control system, and is unaffected by power outages, system crashes, restarts, or program malfunctions. The counting results will not be lost or reset, exhibiting stability far exceeding that of electronic counting. Furthermore, it provides dual verification with electronic counting, promptly detecting abnormalities such as dry injection, glue leakage, and machine shutdowns when the two values ​​are inconsistent, further enhancing the reliability and safety of the production process.

[0020] 3. In view of the problem that the preheating of the barrel in the existing technology relies on external electric heating and has high energy consumption, the present invention sets up an auxiliary melting structure composed of a hollow box, friction block and spring. The drive motor drives the injection stage to move while driving friction to generate heat, directly converting the kinetic energy of the injection into preheating heat energy. No additional electric heater is needed, and the heat is transferred to the barrel to achieve auxiliary preheating, thus achieving energy-saving and high-efficiency technical effects. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the injection molding machine and injection displacement structure proposed in this invention;

[0022] Figure 2 The present invention proposes Figure 1 Partial top view;

[0023] Figure 3 The present invention proposes Figure 1 Partial schematic diagram;

[0024] Figure 4 The present invention proposes Figure 3 Partial schematic diagram;

[0025] Figure 5 The present invention proposes Figure 3 Partial schematic diagram;

[0026] Figure 6 The present invention proposes Figure 5 Sectional view;

[0027] Figure 7 The present invention proposes Figure 5 Split diagram;

[0028] Figure 8 This is a schematic diagram of the circular shaft, gear, disc, and hollow disc proposed in this invention.

[0029] The illustrations in the instruction manual are numbered as follows:

[0030] 1. Injection molding machine; 2. Mold; 3. Gate; 4. Injection stand; 5. Feed hopper; 6. Barrel; 7. Plasticizing servo motor; 8. Extension cylinder; 9. Nozzle; 10. Worm gear; 11. Support rod; 12. Worm; 13. Support column; 14. Rack; 15. Round shaft; 16. Gear; 17. Disc; 18. No. 1 bending plate; 19. Hollow column; 20. Hollow disc; 21. Groove; 22. No. 1 spring; 23. Ball clamp; 24. Ball groove; 25. Inclined groove; 26. Pulley 27. Belt; 28. No. 2 bend plate; 29. ​​No. 1 damping shaft; 30. Small counting disc; 31. No. 2 damping shaft; 32. Large counting disc; 33. Push block; 34. Protrusion; 35. Support bar; 36. Pointer; 37. Drive motor; 38. Ball screw; 39. Opening; 40. Horizontal groove; 41. Hollow box; 42. No. 1 friction block; 43. Limiting groove; 44. No. 2 friction block; 45. No. 2 spring; 46. Main pipe; 47. Fork pipe; 48. Horn air inlet. Detailed Implementation

[0031] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0032] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. In the description of this invention, it should be noted that unless otherwise explicitly specified and limited, the terms "installed," "connected," "linked," and "set up" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances. The following describes embodiments of the invention based on its overall structure.

[0033] The present invention proposes an electric injection transfer structure for an injection molding machine, comprising: an injection molding machine 1, one side of the injection molding machine 1 including a mold 2, the mold 2 being provided with a gate 3, the other side of the injection molding machine 1 including an injection unit 4, a feed hopper 5, a cylindrical barrel 6, and a plasticizing servo motor 7, the output end of the plasticizing servo motor 7 being connected to a screw inside the barrel 6.

[0034] In addition, a drive motor 37 is installed on the top of the injection molding machine 1 and a transverse groove 40 is provided. The injection stage 4 moves along the transverse groove 40. The injection stage 4 is rotatably connected to a ball screw 38. The output end of the drive motor 37 is connected to the ball screw 38. When the drive motor 37 starts, it drives the ball screw 38 to rotate. Then the rotational motion is converted into linear motion, causing the injection stage 4 to move along the transverse groove 40.

[0035] The electric injection structure of this invention is characterized by: a core injection drive and guiding system consisting of a drive motor 37, a ball screw 38, an injection stage 4, a transverse groove 40, a support column 13, and a rack 14. The drive motor 37 outputs power to drive the ball screw 38 to rotate, converting the rotational motion into linear motion, which drives the injection stage 4 to move smoothly back and forth along the transverse groove 40 at the top of the injection molding machine 1. The support column 13 is fixed and the rack 14 remains stationary. When the injection stage 4 moves, it accommodates the support column 13 and the rack 14 through the opening 39, and drives the support rod 11 and the gear 16 to move synchronously with it, providing basic power for the unidirectional rotation of the nozzle 9 and the mechanical counting linkage, realizing the precise, stable, and controllable forward and backward feed motion of the injection stage 4, and meeting the injection stroke and motion accuracy requirements required for injection molding.

[0036] Furthermore, a processing structure is installed at the front end of the barrel 6, and the processing structure is linked to a mechanical counting structure. The processing structure includes an extension cylinder 8 rotatably connected to the end of the barrel 6. A nozzle 9 is fixed to the extension cylinder 8, and a worm gear 10 is fixed to the outside of the extension cylinder 8. A support rod 11 is fixed to the top of the injection stage 4, and a worm gear 12 is fixed to one end of the support rod 11. The worm gear 12 meshes with the worm gear 10. A rack 14 is fixed to the top of the injection molding machine 1 via a support column 13. The injection stage 4 is provided with an opening 39, which facilitates the accommodation of the support column 13 and the rack 14. A round shaft 15 is rotatably connected to the support rod 11. A gear 16 is fixed to one end of the round shaft 15, and a disc 17 is fixed to the other end of the round shaft 15.

[0037] Furthermore, a first bent plate 18 is fixed on the support rod 11, and a hollow column 19 is rotatably connected to the first bent plate 18. A hollow disk 20 is fixed to one end of the hollow column 19, and the disk 17 is rotatably disposed inside the hollow disk 20.

[0038] Furthermore, the disc 17 has slots 21 arranged in a circular array, and a retaining ball 23 is connected inside the slot 21 by a spring 22. The hollow disc 20 has a ball groove 24 and an inclined groove 25 on its inner side. The ball groove 24 and the inclined groove 25 are an integral structure, and the retaining ball 23 is located inside the ball groove 24.

[0039] Furthermore, a pulley 26 is fixed to one end of the worm gear 12, and a groove is provided on the outside of the hollow column 19. The pulley 26 and the groove are connected by a belt 27.

[0040] The above processing structure works as follows: When the drive motor 37 drives the ball screw 38 to rotate, and drives the injection station 4 to move forward along the transverse groove 40 toward the mold 2, the support rod 11 moves synchronously with the injection station 4. When the front end of the nozzle 9 is about to contact the mold gate 3, the gear 16 at the end of the round shaft 15 moves just above the rack 14 and enters a meshing state with it. As the injection station 4 continues to move forward smoothly, the gear 16 rotates under the meshing action of the rack 14, thereby driving the round shaft 15 and the disc 17 to rotate synchronously.

[0041] Combination Figure 8 As shown, in the initial state, the ball 23 in the circumferential array slot 21 of the disc 17 is inserted into the ball groove 24 on the inner side of the hollow disc 20 under the pushing action of the first spring 22. When the injection table 4 moves forward towards the mold 2, the gear 16 meshes and rotates along the rack 14 and drives the disc 17 to rotate clockwise. Since the ball 23 is blocked and limited by the side wall of the ball groove 24 and cannot be dislodged, the disc 17 will synchronously drive the hollow disc 20 to rotate clockwise together through the ball 23.

[0042] When the hollow disc 20 drives the hollow column 19 to rotate clockwise, the hollow column 19 drives the pulley 26 and the worm 12 to rotate synchronously through the belt 27. The worm 12 meshes with the worm wheel 10 fixed outside the extension cylinder 8, driving the extension cylinder 8 and the nozzle 9 to move forward with the injection stage 4 while rotating and smoothly entering the gate 3, realizing the unidirectional rotation of the nozzle 9 during the fitting and tightening process.

[0043] When the launcher 4 retracts during its return stroke, gear 16 drives disk 17 from... Figure 8 When the ball rotates counterclockwise, the ball 23 is squeezed by the inclined groove 25 inside the hollow disk 20, which compresses the first spring 22 and retracts it completely into the groove 21. The ball 23 is released from the ball groove 24. At this time, the disc 17 rotates counterclockwise and only rotates on its own, which cannot drive the hollow disk 20 to rotate synchronously. The hollow disk 20 and the hollow column 19 remain stationary, and the nozzle 9 also stops rotating. Thus, the pure mechanical unidirectional rotation function of the nozzle 9 is synchronously rotated in one direction when the launch platform 4 moves forward and automatically stops rotating when the launch platform 4 moves backward is realized.

[0044] The above-mentioned method does not require an additional motor or electronic control drive. It can accurately achieve unidirectional rotation of the nozzle 9 by relying solely on the power of the movement of the injection stage 4. This ensures that the contact position between the nozzle 9 and the gate 3 changes continuously and evenly, avoiding long-term local pressure wear and depression on the sealing surface, and preventing leakage from the root. The small shear force generated during the rotation can effectively break the fixed adhesion points of the molten material at the gate 3, significantly reducing the risk of sticking to the mold. At the same time, it can automatically scrape off the cold material, carbon deposits and residues on the end face of the nozzle 9 and the periphery of the gate 3, achieving a self-cleaning effect, reducing manual maintenance, and improving the stability of the injection molding process and the product molding quality.

[0045] The next step is that the mechanical counting structure includes a second bending plate 28 fixed on a first bending plate 18, a first damping shaft 29 fixed at one end of the hollow column 19, and a small counting disk 30 fixed after the first damping shaft 29 passes through the second bending plate 28.

[0046] Next, a second damping shaft 31 is fixed to one end of the second bending plate 28, a large counting disk 32 is fixed to one end of the second damping shaft 31, a push block 33 is fixed to the outside of the small counting disk 30, and a protrusion 34 is fixed to the outside of the large counting disk 32.

[0047] Next, a support bar 35 is fixed to the top of the second bending plate 28, and symmetrical pointers 36 are fixed to the support bar 35. The two pointers 36 point to the small counting disk 30 and the large counting disk 32 respectively.

[0048] The working process of the above mechanical counting structure is as follows: The first damping shaft 29 and the second damping shaft 31 have the same function, which is to provide damping resistance to prevent the small counting disk 30 and the large counting disk 32 from shaking or rotating at will when not in operation, so as to ensure that the counting position is stable and accurate.

[0049] The small counting disk 30 has ten numbers from 0 to 9 evenly distributed around its circumference. When the injection stage 4 moves forward, driven by the rack 14 and the unidirectional rotation mechanism, the small counting disk 30 rotates only in one direction. Each time an injection molding is completed and the injection stage moves forward once, the small counting disk 30 rotates one position in one direction. In the initial state, the pointer 36 points to the 0 position of the small counting disk 30. When one part is processed, the number 1 rotates below the pointer 36. When two parts are processed, the number 2 rotates below the pointer 36, and so on. Each time a product is formed, the small counting disk 30 advances one position in one direction. Since the mechanism is unidirectional, the small counting disk 30 will not reverse when the injection stage 4 retracts and spins freely, ensuring that the count only increases and never decreases, and that the count is accurately accumulated. This is the core premise for achieving stable counting.

[0050] When the small counter 30 has rotated 10 times to complete one revolution, the push block 33 on its outside will contact and push the protrusion 34 on the outside of the large counter 32, causing the large counter 32 to rotate one unit in one direction. The large counter 32 also remains in position and does not move under the action of the second damping shaft 31. The large counter 32 has 500 numbers evenly distributed. One unit of the large counter 32 represents 10 rotations of the small counter 30, which corresponds to the forming of 10 products.

[0051] When reading the quantity, first read the value of the large counter dial 32 below pointer 36 and multiply it by 10, then add the value of the small counter dial 30 below pointer 36 to get the total number of formed items.

[0052] For example, if the large counter 32 indicates 200, it means that the small counter 30 has rotated 200 times, corresponding to a base quantity of 2000 pieces. If the small counter 30 indicates 5 at this time, the total count is 2005 pieces, thus realizing a linked mechanical cumulative count and accurately recording the actual processing output of the mold.

[0053] It should be explained that although existing electric injection molding machines are equipped with electronic counting systems, the mechanical counting structure used in this invention still plays an irreplaceable and important role: mechanical counting does not require a power supply, does not rely on the injection molding machine control system and circuit, is not affected by power outages, system crashes, restarts, parameter resets or program failures, the counting results will not be lost or cleared, and its stability is far higher than that of electronic counting.

[0054] Meanwhile, mechanical counting and electronic counting can form a dual verification, and the two do not overlap. When the two values ​​are inconsistent, abnormal situations such as dry shooting, glue leakage, and machine shutdown can be detected in time, further improving the reliability and safety of the production process.

[0055] Furthermore, an auxiliary melting structure is installed on the injection stage 4. The auxiliary melting structure includes a hollow box 41 fixed to the outer wall of the injection molding machine 1. The other output end of the drive motor 37 is located inside the hollow box 41 and a first friction block 42 is installed through a flange. A limiting groove 43 is provided at the bottom of the inner cavity of the hollow box 41. A second friction block 44 is placed inside the hollow box 41. The bottom of the second friction block 44 is inserted into the limiting groove 43. A second spring 45 is connected to the inner wall of the hollow box 41. One end of the second spring 45 abuts against the second friction block 44 and is compressed.

[0056] Furthermore, the material cylinder 6 is fixed with a main pipe 46, the main pipe 46 is connected to three fork pipes 47, the fork pipes 47 are connected to a horn air inlet 48, and the three fork pipes 47 are located above the plasticizing servo motor 7 and the drive motor 37 and inside the hollow box 41.

[0057] The above-mentioned auxiliary melting structure works as follows: while the drive motor 37 drives the ball screw 38 to drive the injection stage 4 to move, its output end simultaneously drives the first friction block 42 in the hollow box 41 to rotate continuously. The first friction block 42 and the second friction block 44, which is pressed by the second spring 45, are in close contact and generate relative friction, forming a stable heat source through frictional heat generation.

[0058] like Figure 4 As shown, when friction block 42 and friction block 44 wear out during long-term use, the pre-compressed spring 45 will continuously push friction block 44, causing it to move automatically towards friction block 42 along the limiting groove 43, thereby ensuring that the two friction blocks are always tightly fitted and will not have gaps due to wear, thus ensuring that the hollow box 41 generates continuous and stable heat during operation.

[0059] During the plasticizing process of the injection stage 4, the heat in the hollow box 41 and the heat generated by the plasticizing servo motor 7 and drive motor 37 are transferred to the main pipe 46 through the horn air inlet 48 and the fork pipe 47. Then, the main pipe 46 delivers hot air to the barrel 6 to preheat the plastic raw material in the barrel 6, accelerate the melting speed of the raw material and improve the melting uniformity. This structure directly uses the power of the injection drive motor to achieve auxiliary heating, without the need for additional electric heaters and electronic control devices, which is energy-saving, efficient, safe and reliable.

[0060] The above are merely preferred embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. An electric injection displacement structure for an injection molding machine, comprising: An injection molding machine (1) is provided with a mold (2) on one side, a gate (3) on the mold (2), and a injection unit (4), a feed hopper (5), a cylindrical barrel (6), and a plasticizing servo motor (7) on the other side. The output end of the plasticizing servo motor (7) is connected to a screw inside the barrel (6). The barrel (6) is characterized in that a processing structure is installed at the front end of the barrel (6), and the processing structure is linked to a mechanical counting structure. The processing structure includes an extension cylinder (8) rotatably connected to the end of the barrel (6). A nozzle (9) is fixed on the extension cylinder (8). The extension cylinder (8) has an outer... A worm gear (10) is fixed to the top of the injection molding machine (1), a support rod (11) is fixed to the top of the injection molding machine (4), a worm (12) is fixed to one end of the support rod (11), the worm (12) meshes with the worm gear (10), a rack (14) is fixed to the top of the injection molding machine (1) by a support column (13), an opening (39) is provided on the injection molding machine (4), the opening (39) facilitates the accommodation of the support column (13) and the rack (14), a round shaft (15) is rotatably connected to the support rod (11), a gear (16) is fixed to one end of the round shaft (15), and a disc (17) is fixed to the other end of the round shaft (15).

2. The electric injection displacement structure of an injection molding machine according to claim 1, characterized in that, A first bent plate (18) is fixed on the support rod (11). A hollow column (19) is rotatably connected to the first bent plate (18). A hollow disk (20) is fixed to one end of the hollow column (19). The disk (17) is rotatably disposed inside the hollow disk (20).

3. The electric injection displacement structure of an injection molding machine according to claim 2, characterized in that, The disc (17) has slots (21) arranged in a circumferential array. A retaining ball (23) is connected inside the slot (21) by a spring (22). The hollow disc (20) has a ball groove (24) and an inclined groove (25) on its inner side. The ball groove (24) and the inclined groove (25) are an integral structure. The retaining ball (23) is located inside the ball groove (24).

4. The electric injection displacement structure of an injection molding machine according to claim 3, characterized in that, One end of the worm (12) is fixed with a pulley (26), and the hollow column (19) is provided with a groove on the outside. The pulley (26) and the groove are connected by a belt (27).

5. The electric injection displacement structure of an injection molding machine according to claim 1, characterized in that, The mechanical counting structure includes a second bending plate (28) fixed on a first bending plate (18), a first damping shaft (29) fixed at one end of the hollow column (19), and a small counting disk (30) fixed after the first damping shaft (29) passes through the second bending plate (28).

6. The electric injection displacement structure of an injection molding machine according to claim 5, characterized in that, One end of the second bending plate (28) is fixed with a second damping shaft (31), one end of the second damping shaft (31) is fixed with a large counting disk (32), a push block (33) is fixed to the outside of the small counting disk (30), and a protrusion (34) is fixed to the outside of the large counting disk (32).

7. The electric injection displacement structure of an injection molding machine according to claim 6, characterized in that, The top of the second bending plate (28) is fixed with a support bar (35), and the support bar (35) is fixed with symmetrical pointers (36), the two pointers (36) pointing to the small counting disk (30) and the large counting disk (32) respectively.

8. The electric injection displacement structure of an injection molding machine according to claim 1, characterized in that, The top of the injection molding machine (1) is equipped with a drive motor (37) and a transverse groove (40). The injection stage (4) moves along the transverse groove (40). The injection stage (4) is rotatably connected to a ball screw (38). The output end of the drive motor (37) is connected to the ball screw (38).

9. The electric injection displacement structure of an injection molding machine according to claim 1, characterized in that, An auxiliary melting structure is installed on the injection stage (4). The auxiliary melting structure includes a hollow box (41) fixed to the outer wall of the injection molding machine (1). The other output end of the drive motor (37) is located inside the hollow box (41) and a first friction block (42) is installed through a flange. A limiting groove (43) is provided at the bottom of the inner cavity of the hollow box (41). A second friction block (44) is placed inside the hollow box (41). The bottom of the second friction block (44) is inserted into the limiting groove (43). A second spring (45) is connected to the inner wall of the hollow box (41). One end of the second spring (45) abuts against the second friction block (44) and is compressed.

10. The electric injection displacement structure of an injection molding machine according to claim 9, characterized in that, The barrel (6) is fixed with a main pipe (46), the main pipe (46) is connected to three fork pipes (47), the fork pipes (47) are connected to a horn air inlet (48), and the three fork pipes (47) are located above the plasticizing servo motor (7), the drive motor (37) and inside the hollow box (41).

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