Electric mold closing device of two-plate machine

Abstract

The utility model relates to the field of two-plate machines, in particular to an electric mold closing device of a two-plate machine. The two-plate machine mold closing device comprises a high-pressure mold locking mechanism, a pressurizing rack screw rod mechanism, a mold moving mechanism, an ejection mechanism, a pull rod nut mechanism and a band-type brake nut mechanism; the gear wedge ring is connected with the fixed wedge ring, the fixed wedge ring is coaxially positioned on the gear wedge ring, the spiral faces are arranged on the two sides of the fixed wedge ring, the rotary wedge ring is arranged on the left side of the fixed wedge ring, the rotary wedge ring is coaxially positioned on the fixed wedge ring and concentrically installed with the pull rod, and the fixed wedge ring is positioned on the movable mold plate through the fixing rod. The gear wedge ring and the rotating wedge ring can rotate around a shaft, a connecting plate and an air cylinder assembly are arranged on the rotating wedge ring, and one end of the air cylinder assembly is connected with an outer ring of the rotating wedge ring. Compared with an existing high-pressure oil cylinder mold closing device, the high-pressure oil cylinder mold closing device is simple in structure, hydraulic oil leakage is avoided, all executing mechanisms are driven by the motor, the response speed and the control precision are higher, and the production efficiency and the stability of injection molding are improved.

Description

Technical Field

[0001] The utility model relates to the field of two-platen machines, in particular to an electric mold clamping device for a two-platen machine. Background Technique

[0002] At present, for traditional two-platen hydraulic presses, when moving the moving platen, the brake nut of the moving platen disengages from the pull rod, and when high-pressure mold clamping is performed, the brake nut of the moving platen has to be locked with the pull rod again. This mechanism is the brake mechanism. Usually, one set of brake mechanism is configured for one pull rod, which is composed of a brake cylinder assembly, a high-pressure cylinder assembly, an upper brake block and a lower brake block. The upper and lower brake blocks are opened and closed by the backward movement of the brake cylinder to achieve clamping, and then the high-pressure cylinder applies pressure to lock the internal teeth of the brake nut and the external teeth of the pull rod. For different mold thicknesses, in order to make the ring teeth on the inner circle of the brake block mesh with the ring teeth on the outer circle of the pull rod, the relative positions of the pull rod and the brake mechanism fixed on the moving platen are adjusted through the mold clamping mechanism.

[0003] For the high-pressure cylinder structure of the brake nut of the two-platen hydraulic press, when high pressure is required, the high-pressure cylinder moves its position through the oil pressure of the high-pressure cylinder head, thereby driving the external teeth and internal teeth of the pull rod brake nut and the pull rod to be locked. The disadvantage is that the high-pressure cylinder structure is complex and prone to hydraulic oil leakage.

[0004] Therefore, it is designed that each actuator of a two-platen injection molding machine is driven by a motor. Compared with the traditional hydraulic mold clamping device, the all-electric one has a faster response speed and control accuracy, improving the production efficiency and stability of injection molding. Content of the Utility Model

[0005] This application provides an electric mold clamping device for a two-platen machine, adopting the following technical solutions:

[0006] An electric mold clamping device for a two-platen machine. The two-platen machine includes a high-pressure mold clamping structure, a booster rack and screw mechanism, a moving mold assembly structure, an ejector assembly structure, a tie rod nut structure and a brake nut structure; a fixed wedge ring is connected to the gear wedge ring. The fixed wedge ring is coaxially positioned on the gear wedge ring. Rotating spiral surfaces are provided on both sides of the fixed wedge ring. A rotating wedge ring is provided on the left side of the fixed wedge ring. The rotating wedge ring is coaxially positioned on the fixed wedge ring and is concentrically installed with the tie rod. The fixed wedge ring is positioned on the moving platen. The gear wedge ring and the rotating wedge ring can rotate around the axis. A connecting plate is provided on the rotating wedge ring. A cylinder assembly is provided on the rotating wedge ring. One end of the cylinder assembly is connected to the outer ring of the rotating wedge ring, and the other end is provided on the connecting plate; a booster rack and screw mechanism is provided between the gear wedge rings. A booster rack is provided on the gear wedge ring. A reduction motor fixing plate and a screw positioning seat are provided on the moving platen. A ball screw is provided on the screw positioning seat. A booster rack connecting plate is provided on the ball screw. A booster rack transition plate is provided on the booster rack connecting plate. The booster rack is fixed on the booster rack transition plate. The booster rack meshes with the gear wedge ring. The reduction motor is fixed on the booster reduction motor fixing plate. The gear wedge ring is subjected to an external force from the booster rack, causing the gear wedge ring to be torqued and rotated. When rotating, the relative distance from the rotating spiral surface of the fixed wedge ring increases, generating a powerful mold clamping force towards the moving platen; the contact surfaces of the rotating wedge ring, the gear wedge ring and the fixed wedge ring are set as spiral rising surfaces with the same lead angle, which can be a plane or a curved surface of any shape, that is, the radial section of the spiral surface is a straight line segment, an oblique line segment or a curved line segment. There are several spiral surfaces on the same end face, and the lead angles of the spiral surfaces are the same.

[0007] Optionally, the lower part of the gear wedge ring is set in an arc-shaped fan style. A rack is provided on the arc-shaped fan surface. A protruding rotating spiral surface is provided on the gear wedge ring. Rotating spiral surfaces are provided on both sides of the fixed wedge ring. Bolt holes are provided at the top of the fixed wedge ring and are connected to the fixed rods on the moving platen through the bolt holes.

[0008] Optionally, the two-platen machine is provided with a front platen and a moving platen. A moving mold screw sleeve and a motor are provided on the moving platen. A screw A is provided on the front platen. Two bearing Bs are provided on the moving platen. One bearing B is tightened by a moving mold ball sleeve nut. The moving mold screw sleeve is concentrically arranged in the two bearing Bs. Two synchronous wheels B are vertically arranged above and below the moving mold screw sleeve.

[0009] Optionally, a moving mold screw mounting plate is provided on the front platen. The screw A is positioned on the moving mold screw mounting plate and is tightened by a moving mold screw split nut.

[0010] Optionally, the two-platen machine is provided with a front platen and a tie rod. A head plate tie rod copper sleeve is provided on the front platen. One end is in contact connection with the tie rod nut in a spherical arc surface. The tie rod is concentric with the head plate tie rod copper sleeve and the tie rod nut, and is bolted to the tie rod nut. The tie rod is fixed by a tie rod pressing plate to prevent the tie rod from moving back and forth.

[0011] Optionally, there are four ejector guide rods provided on the moving template. An ejector guide rod fixing plate is concentrically arranged on the ejector guide rod. An ejector bearing positioning seat is fixed on the ejector guide rod fixing plate, and bearing C is installed on the ejector bearing positioning seat.

[0012] Optionally, a ball screw nut is provided on the ejector guide plate. An ejector motor adjusting plate is provided on the ejector guide rod fixing plate. A tensioning block B is provided on the ejector motor adjusting plate, and a servo motor is provided on the ejector motor adjusting plate.

[0013] Optionally, a tensioning wheel positioning shaft is provided on the ejector guide rod fixing plate. The tensioning wheel positioning shaft is fixed by a positioning shaft bush. Bearing D is installed on the tensioning wheel positioning shaft. The electric ejecting mechanism has synchronous pulley D, synchronous pulley D and synchronous pulley C. When the servo motor rotates, synchronous pulley D drives synchronous pulley D and synchronous pulley C to rotate together. Synchronous pulley E is connected and fixed to lead screw B. A ball screw nut is provided on lead screw B. The ball screw nut is connected to the ejector guide plate. Lead screw B drives the ball screw nut, thereby driving the ejector guide plate to make reciprocating movements back and forth.

[0014] Optionally, the brake nut structure includes a brake nut, a brake pressure plate. The brake pressure plate is fixed on the brake nut connecting plate, and there are four pieces up and down. The brake pressure plate clamps and limits the brake nut. The brake nut is equipped with symmetric brake adjusting and fixing seats, and the brake adjusting and fixing seats are fixed on the brake nut. A brake connecting rod is arranged between the brake nuts. The brake connecting rod is connected with a brake adjusting rod. A brake motor fixing backing plate is provided on the brake nut connecting plate, and a reduction motor B is provided on the brake motor fixing backing plate.

[0015] Optionally, there are four brake nut fixing rods arranged between the brake nuts. The four brake nut fixing rods fix the upper and lower two brake nuts in a staggered series connection.

[0016] Compared with the prior art, the beneficial effects of the present utility model are as follows: Each actuator of the all-electric two-platen injection molding machine is driven by an independent servo motor and is not affected by the overall system, improving production efficiency. The independent operation of each component improves the overall efficiency.

[0017] By the combined use of the helical surfaces on the three wedge ring surfaces of the rotating wedge ring, the fixed wedge ring, and the gear wedge ring, the stroke is increased to generate a locking force between the internal teeth of the brake nut and the external teeth of the pull rod, realizing an increase in the clamping force during mold closing. Moreover, compared with the mold closing high-pressure oil cylinder of the existing two-platen machine, the structure of this device is simpler and there will be no situation of hydraulic oil leakage like that of the mold closing high-pressure oil cylinder.

[0018] By the reciprocating movement of the boosting rack, the gear wedge ring rotates, providing a high-pressure clamping force to the overall template after mold closing, making the product injection molding of the two-platen machine more stable.

[0019] One end of the ball arc surface of the pull rod nut copper sleeve on the pull rod nut copper sleeve mechanism is matched with one end of the ball arc surface of the pull rod nut. When the two-platen machine performs high-pressure mold clamping, the stress caused by the pull rod under force can bear a high load under the action of the two ball arc surfaces.

[0020] The design of the ejection mechanism enables the ejection guide plate to reciprocate back and forth, thereby causing the ejection rod to also reciprocate to meet the requirement of ejecting the product. Brief Description of the Drawings

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will discuss the drawings required for use in the description of the embodiments or the prior art. Obviously, the technical solutions described in conjunction with the drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other embodiments and their drawings can also be obtained based on the embodiments shown in these drawings.

[0022] Figure 1 It is a schematic diagram of the high-pressure mold clamping structure of an electric mold clamping device for a two-platen machine according to the present invention.

[0023] Figure 2 It is a schematic diagram of the cylinder assembly of the high-pressure mold clamping structure of an electric mold clamping device for a two-platen machine according to the present invention.

[0024] Figure 3 It is a front schematic diagram of the cylinder assembly structure of an electric mold clamping device for a two-platen machine according to the present invention.

[0025] Figure 4 It is a structure diagram of a rotating wedge ring, a fixed wedge ring, and a gear wedge ring of an electric mold clamping device for a two-platen machine according to the present invention.

[0026] Figure 5 It is a schematic diagram of the boosting structure of an electric mold clamping device for a two-platen machine according to the present invention.

[0027] Figure 6 It is a schematic diagram of the mold moving structure of an electric mold clamping device for a two-platen machine according to the present invention.

[0028] Figure 7 It is a side schematic diagram of the ejection structure of an electric mold clamping device for a two-platen machine according to the present invention.

[0029] Figure 8 It is an enlarged view of area A of an electric mold clamping device for a two-platen machine according to the present invention.

[0030] Figure 9 It is a schematic diagram of the synchronous pulley and synchronous belt of an electric mold clamping device for a two-platen machine according to the present invention.

[0031] Figure 10It is a schematic diagram of the slope of the pull rod nut structure of the electric mold clamping device of a two-platen machine in the present utility model.

[0032] Figure 11 It is a front schematic diagram of the brake mechanism of the electric mold clamping device of a two-platen machine in the present utility model.

[0033] Figure 12 It is a side schematic diagram of the brake mechanism of the electric mold clamping device of a two-platen machine in the present utility model.

[0034] In the figure: 1 - moving platen, 2 - pull rod, 3 - rotating wedge ring gasket, 4 - gear wedge ring, 5 - fixed wedge ring, 6 - rotating wedge ring, 7 - connecting plate, 8 - boosting rack, 9 - ball screw, 10 - boosting rack connecting plate, 11 - reduction motor A, 12 - bearing A, 13 - connecting plate guide rod, 14 - bearing pressing plate, 15 - synchronous pulley A, 16 - motor, 17 - screw rod A, 18 - tensioning block A, 19 - synchronous pulley B, 20 - moving die ball sleeve nut, 21 - bearing B, 22 - moving die screw rod sleeve, 23 - moving die screw rod mounting plate, 24 - moving die screw rod split nut, 25 - front platen, 26 - pull rod pressing plate, 27 - pull rod nut, 28 - head plate pull rod copper sleeve, 29 - servo motor, 30 - ejector guide rod fixing plate, 31 - tensioning block B, 32 - ejector motor adjusting plate, 33 - ejector guide rod, 34 - ball screw nut, 35 - ejector guide plate, 36 - screw rod B, 37 - ejector rod, 38 - ejector ball screw nut, 39 - synchronous pulley C, 40 - ejector bearing positioning seat, 41 - bearing C, 42 - positioning seat pressing plate, 43 - synchronous pulley D, 44 - synchronous pulley E, 45 - synchronous belt, 46 - positioning shaft bushing, 47 - tensioning wheel positioning shaft, 48 - bearing D, 49 - reduction motor B, 50 - brake nut fixing rod, 51 - brake motor fixing plate, 52 - brake motor fixing cushion plate, 53 - brake connecting rod, 54 - brake pressing plate, 55 - brake nut limiting block, 56 - brake nut, 57 - brake adjusting fixing seat, 58 - brake nut connecting plate, 59 - brake adjusting rod, 60 - cylinder assembly. Specific embodiments

[0035] The technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope protected by the present utility model.

[0036] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "inner", "outer", "front end", "rear end", "both ends", "one end", "the other end", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0037] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0038] An embodiment of the present utility model provides an electric mold clamping device for a two-platen injection molding machine.

[0039] As Figures 1-12 shown, an electric mold clamping device for a two-platen injection molding machine includes a high-pressure mold locking structure, a booster rack and screw mechanism, a moving mold assembly structure, an ejection assembly structure, a tie rod nut structure, and a brake nut structure. As Figure 1As shown in the figure, a pull rod 2 is configured with a set of spiral high-pressure clamping structures. A rotating wedge ring gasket 3 is arranged on the moving template 1. The rotating wedge ring gasket 3 is fixed on the moving template 1. The gear wedge ring 4 is coaxially positioned on the rotating wedge ring gasket 3. The lower part of the gear wedge ring 4 is in the shape of an arc fan. A rack is arranged on the arc fan surface. A protruding rotating spiral surface is arranged on the gear wedge ring 4. A fixed wedge ring 5 is connected and arranged on the gear wedge ring 4. The fixed wedge ring 5 is coaxially positioned on the gear wedge ring 4. Rotating spiral surfaces are arranged on both sides of the fixed wedge ring 5. A bolt hole is arranged at the top of the fixed wedge ring 5 and is connected to the fixed rod on the moving template 1 through the bolt hole. Therefore, the fixed wedge ring 5 will not rotate. A rotating wedge ring 6 is arranged on the left side of the fixed wedge ring 5. One side of the rotating wedge ring 6 has a protruding rotating spiral surface that is horizontal. The rotating spiral surfaces on the gear wedge ring 4 and the rotating wedge ring 6 are both in fit connection with the rotating spiral surfaces on both sides of the fixed wedge ring 6. The rotating wedge ring 6 is coaxially positioned on the fixed wedge ring 5 and is concentrically installed with the pull rod 2. The fixed wedge ring 5 is positioned on the moving template 1, and the gear wedge ring 4 and the rotating wedge ring 6 can rotate around the axis. A connecting plate 7 is arranged on the horizontal surface of the rotating wedge ring 6. The connecting plate 7 is used to position and clamp the rotating wedge ring 6 by the brake nut 56. A cylinder assembly 60 is arranged on the rotating wedge ring 6. One end of the cylinder assembly 60 is connected to the outer ring of the rotating wedge ring 6, and the other end is arranged on the connecting plate 7. The high-pressure clamping structures are arranged corresponding to each other up and down.

[0040] The brake nut 56 is an upper and lower brake block. Inner teeth are arranged in the upper and lower brake blocks. Outer teeth are arranged on the pull rod 2. The inner teeth of the upper and lower brake blocks of the brake nut 56 correspond to and fit with the outer teeth of the pull rod 2. After the upper and lower brake blocks are opened, they are clamped and meshed with the outer teeth of the pull rod 2. Before the inner teeth of the brake nut are closed with the outer teeth of the pull rod during work, due to the installation of the mold between the head plate and the moving template, there is a certain distance between the inner teeth of the brake nut and the outer teeth of the pull rod. It is required that the outer teeth and the side surfaces of the inner teeth are in contact. The rotating wedge ring 6 is rotated through the movement of the cylinder assembly 60. Due to the interaction between the rotating spiral surface on the rotating wedge ring 6 and the spiral surface on the fixed wedge ring 5, the connecting plate 7 is contacted and pressurized with the brake nut 56, so that the inner teeth of the upper and lower brake blocks of the brake nut 56 are completely in contact with the side surfaces of the outer teeth of the pull rod 2. Since the fixed wedge ring 5 is positioned on the moving template 1 through the fixed rod, the fixed wedge ring 5 cannot deflect. The rotating spiral surface on the fixed wedge ring 5 is in contact and meshed with the rotating spiral surface on the rotating wedge ring 6. The cylinder assembly 60 is started to give a rotating torque to the rotating wedge ring 6. The rotating wedge ring 6 is subjected to this rotating torque, so that the rotating spiral surface on it and the rotating spiral surface in contact with the fixed wedge ring 5 gradually move away from each other along the axis, and the relative distance between the two increases, applying a locking force to the left to the connecting plate 7. Due to this locking force, the inner teeth of the brake nut 56 are in contact with the side surfaces of the outer teeth of the pull rod 2.

[0041] A pressure-boosting rack and screw mechanism is arranged between the gear wedge rings 4. The pressure-boosting rack and screw mechanism is controlled by two groups on the left and right of the moving template 1 respectively, and is configured with two left and right reduction motors 11. A pressure-boosting rack 8 is arranged on the arc-shaped tooth surface of the gear wedge ring 4, and the rack on the pressure-boosting rack 8 corresponds to the arc-shaped tooth surface on the gear wedge ring 4. A reduction motor fixing plate and a screw positioning seat are arranged on the moving template 1. A ball screw 9 is arranged on the screw positioning seat. The ball screw 9 is concentrically positioned by two bearings A12 on both sides. One end that bears force positions the bearing A12 with a bearing pressing plate 14, and then is tightened with a ball screw nut. A pressure-boosting rack connecting plate 10 is arranged on the ball screw 9. The pressure-boosting rack connecting plate 10 is guided by two upper and lower connecting plate guide rods 13 respectively. A pressure-boosting rack transition plate is arranged on the pressure-boosting rack connecting plate 10. The pressure-boosting rack 8 is fixed on the pressure-boosting rack transition plate. The pressure-boosting rack 8 meshes with the gear wedge ring 4. The reduction motor 11 is fixed on the pressure-boosting reduction motor fixing plate.

[0042] When the action runs, the reduction motor 11 rotates to drive the synchronous pulley A15. The synchronous pulley A15 is positioned on the ball screw 9. Through the belt pulley, the ball screw 9 is driven to rotate in a reciprocating motion. The connecting plate of the boosting rack 8 moves in a reciprocating motion together with the ball screw 9, thereby driving the boosting rack 8 to move in a reciprocating motion. Through the tooth-shaped engagement of the boosting rack 8 and the gear wedge ring 4, the gear wedge ring 4 makes a rotational motion. The rotation of the gear wedge ring 4 causes the rotational spiral surfaces of the gear wedge ring 4 and the fixed wedge ring 5 to extrude a distance, thereby generating a mechanical mechanism for high-pressure mold clamping. Because the rotational spiral surface on the gear wedge ring 4 is in contact and connected with the rotational spiral surface on the fixed wedge ring 5, at this time, when the boosting rack 8 moves, the external force generated exerts a torsion force on the gear wedge ring 4, applying a torque to rotate the gear wedge ring 4 so that the rotational spiral surface in contact with the fixed wedge ring 5 on it gradually moves away from each other along the axis, and the rotational spiral surfaces of the gear wedge ring 4 and the fixed wedge ring 5 are always in partial contact. Because the fixed wedge ring 5 is positioned on the moving template through the fixed rod, the fixed wedge ring 5 does not rotate or deflect. The gear wedge ring 4 is subjected to the external force of the external boosting rack 8, causing the gear wedge ring to rotate under torque. When rotating, the relative distance from the rotational spiral surface of the fixed wedge ring 8 increases, generating a powerful mold clamping force towards the moving template 1, realizing the operation of high-pressure mold clamping, no longer requiring the use of high-pressure oil pressure as currently used to achieve mold clamping, and also reducing such situations as oil leakage. At the same time, at least one torque application position is set on the rotating wedge ring 6 and the gear wedge ring 4, and it can also be divided into multiple places. For example, a small torque is required during the distance adjustment process, and a large torque is required during the force application process. Therefore, a small torque application position and a large torque application position can be set respectively. Different torque application positions can be set according to the rotation accuracy, speed, etc. The relative rotation between the fixed wedge ring 5, the rotating wedge ring 6 and the gear wedge ring 4 reduces the friction force on the contact surface between the two. A copper sliding plate structure is provided at the connection between the fixed wedge ring 5, the rotating wedge ring 6 and the gear wedge ring 4 to reduce the influence of the friction force. The contact surfaces of the rotating wedge ring 6, the gear wedge ring 4 and the fixed wedge ring 5 are set as helically rising surfaces with the same lead angle, which can be a plane or a curved surface of any shape, that is, the radial section of the spiral surface is a straight line segment, an oblique line segment, or a curved line segment. There are several spiral surfaces on the same end surface, and the lead angles of the spiral surfaces are the same, ensuring that the rotation angles and support angles of the multiple spiral surfaces are synchronized and the force is evenly distributed.

[0043] The mold moving structure is controlled by two sets respectively on the upper, lower, left and right. A mold moving lead screw sleeve 22 and a motor 16 are arranged on the moving template 1. The lead screw A17 is fixed on the front template 25. One motor 16 controls one set of mold moving mechanisms. Two bearings B21 are positioned on the moving template 1. One bearing B21 is tightened by the mold moving ball sleeve nut 20. The mold moving lead screw sleeve 22 is concentrically arranged in the two bearings B21. The synchronous pulley B19 is positioned on the mold moving lead screw sleeve 22. There are two synchronous pulleys B19 arranged vertically up and down. The motor 16 is fixedly arranged on the mold moving motor adjusting plate. The tensioning block A18 adjusts the distance between the two synchronous pulleys B19 through the synchronous belt. The mounting plate of the mold moving lead screw A17 is fixed on the front template 25. A mold moving lead screw mounting plate 23 is arranged on the front template 25. The lead screw A17 is positioned on the mold moving lead screw mounting plate 23 and tightened by the mold moving lead screw split nut 24. When the motor 11 rotates, it drives the synchronous pulley B19. The synchronous pulley B19 drives the rotating mold moving lead screw sleeve 22. The mold moving lead screw sleeve 22 and the lead screw A17 make reciprocating movements. The mold moving lead screw sleeve 22 drives the moving template 1 to make linear movements left and right. In this way, the opening and closing actions of the moving template 1 are completed.

[0044] The tie rod nut bronze sleeve mechanism consists of one set of tie rod nut bronze sleeves for each of the four tie rods 2 of the two-platen machine. There are four tie rods 2 in total for the two-platen machine. The head plate tie rod bronze sleeve 28 is fixed on the front template 25. The other end contacts the tie rod nut 27 with a spherical arc surface. The tie rod 2 is concentric with the head plate tie rod bronze sleeve 28 and the tie rod nut 27, and is bolted to the tie rod nut 27. The tie rod 2 is fixed by the tie rod pressing plate 26 to prevent the tie rod 2 from moving back and forth. One spherical arc surface at one end of the tie rod nut bronze sleeve 28 cooperates with one spherical arc surface at one end of the tie rod nut 27. When the two-platen machine performs high-pressure mold clamping, the stress caused by the force on the tie rod 2 can bear a higher load under the action of the two spherical arc surfaces, and the influence of axial displacement can be reduced when the two spherical arc surfaces are in contact.

[0045] The electric ejection mechanism consists of a servo motor 29 and three synchronous pulleys. There are four ejection guide rods 33 fixed on the moving template 1. The ejection guide rod fixing plates 30 are concentrically arranged on the ejection guide rods 33. The ejection bearing positioning seats 40 are fixed on the ejection guide rod fixing plates 30. The ejection bearing positioning seats 40 are installed with bearings C41. Another set of bearings parallel to the bearings C41 are also installed on the moving template. The ball screw nuts 34 are positioned on the ejection guide plates 35. There are four ejection guide plates 35. The ejection motor adjusting plate 32 is positioned on the ejection guide rod fixing plate 30. The tensioning block B31 is arranged on the ejection motor adjusting plate 32. The tensioning block B31 adjusts the tightness of the synchronous belt 45. The servo motor 29 is fixed on the ejection motor adjusting plate 32. Two ejection ball screw nuts 38 position the synchronous pulley C39. The advancing and retreating distance of the ejection ball screw nuts 38 is controlled by the spacer sleeve.

[0046] A tension pulley positioning shaft 47 is provided on the ejector guide rod fixing plate 30. The tension pulley positioning shaft 47 is fixed by a positioning shaft bushing 46. A bearing D48 is installed on the tension pulley positioning shaft 47 to control the tension pulley. When the servo motor 29 rotates, the synchronous pulley D43 drives the synchronous pulley D43 and the synchronous pulley C39 to rotate together. The synchronous pulley E44 is fixedly connected to the lead screw B36. A ball screw nut 34 is provided on the lead screw B36. The ball screw nut 34 is connected to the ejector guide plate 35. The lead screw B36 drives the ball screw nut 34, thereby driving the ejector guide plate 35 to reciprocate back and forth to meet the requirement of the ejector rod 37 to eject the product.

[0047] The brake nuts 56 are controlled by two groups on the left and right respectively in the all-electric two-platen machine. A reduction motor B49 controls the connecting rod mechanical mechanism of the upper and lower two brake nuts. There are two reduction motors B49 in a whole all-electric two-platen machine, which are composed of four brake nuts 56. The brake pressure plate 54 is fixed on the brake nut connecting plate 58. There are four pieces in a group, upper and lower. The brake pressure plate 54 clamps and limits the brake nut 56, and only allows the brake nut 56 to run along the guide rail of the brake pressure plate 54. The position of a brake nut 56 is restricted by four upper and lower brake nut limit blocks 55. The brake adjustment fixing seat 57 is fixed on the brake nut 56. The upper and lower two brake nuts 56 are equipped with symmetric brake adjustment fixing seats 57. The upper and lower two brake connecting rods 53 are respectively matched and positioned with the brake adjustment fixing seat 57 and the brake adjustment rod 59. The brake adjustment rod 59 is positioned and fixed by the reduction motor B49. The reduction motor B49 is fixed on the brake motor fixing plate 52. The brake motor fixing pad 52 is fixed on the brake nut connecting plate 58. The brake motor fixing plate 51 is positioned on the brake motor fixing pad 52. Four brake nut fixing rods 50 fix the upper and lower two brake nuts 56 in a staggered series connection. When the reduction motor B49 runs and rotates, it drives the brake adjustment rod 59 to rotate left and right. Due to the fact that the four brake nut fixing rods 50 fix the upper and lower two brake nuts 56 in a staggered series connection, the brake nut 56 is driven under the action of the brake connecting rod 53, realizing the actions of the brake nut 56 closing and opening up and down, thereby meeting the actions of the brake nut 56 and the pull rod 2 to realize mold clamping and mold opening by the action of internal teeth and external teeth.

[0048] For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic characteristics of the present utility model. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present utility model is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present utility model. Any reference signs in the claims should not be regarded as limiting the claimed rights.

[0049] In addition, it should be understood that although this specification is described in terms of embodiments, not every embodiment contains only an independent technical solution. This narrative style of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A two-platen electric mold clamping device, characterized in that: The two-platen machine includes a high-pressure clamping structure, a booster rack screw mechanism, a mold shifting assembly structure, an ejector assembly structure, a tie rod nut structure and a brake nut structure; A fixed wedge ring (5) is connected to the gear wedge ring (4). The fixed wedge ring (5) is coaxially positioned on the gear wedge ring (4). Spiral surfaces are provided on both sides of the fixed wedge ring (5). A rotating wedge ring (6) is provided on the left side of the fixed wedge ring (5). The rotating wedge ring (6) is coaxially positioned on the fixed wedge ring (5) and is installed concentrically with the pull rod (2). The fixed wedge ring (5) is positioned on the moving plate (1) through the fixed rod. The gear wedge ring (4) and the rotating wedge ring (6) can rotate around the axis. A connecting plate (7) is provided on the rotating wedge ring (6). A cylinder assembly (60) is provided on the rotating wedge ring (6). One end of the cylinder assembly (60) is connected to the outer ring of the rotating wedge ring (6), and the other end is provided on the connecting plate (7). A boost rack screw mechanism is arranged between the gear wedge rings (4); a boost rack (8) is arranged on the gear wedge ring (4); a reduction motor fixing plate and a screw positioning seat are arranged on the movable plate (1); a ball screw (9) is arranged on the screw positioning seat; a boost rack connecting plate (10) is arranged on the ball screw (9); a boost rack transition plate is arranged on the boost rack connecting plate (10); the boost rack (8) is fixed on the boost rack transition plate; the boost rack (8) is meshed with the gear wedge ring (4); and the reduction motor (11) is fixed on the boost reduction motor fixing plate.

2. The two-platen electric mold clamping device according to claim 1, characterized in that: The gear wedge ring (4) is provided with an arc-shaped fan-shaped pattern at the bottom, a rack is provided on the arc-shaped fan-shaped surface, a raised rotating spiral surface is provided on the gear wedge ring (4), rotating spiral surfaces are provided on both sides of the fixed wedge ring (5), and a bolt hole is provided on the top of the fixed wedge ring (5), which is connected to the fixed rod on the moving template (1) through the bolt hole.

3. The two-platen electric mold clamping device according to claim 1, characterized in that: The two-plate machine is provided with a front plate (25) and a movable plate (1), a mold-shifting screw sleeve (22) and a motor (16) are provided on the movable plate (1), a screw A (17) is provided on the front plate (25), two bearings B (21) are provided on the movable plate (1), one bearing B (21) is fastened by a mold-shifting ball sleeve nut (20), the mold-shifting screw sleeve (22) is concentrically arranged in the two bearings B (21), and a synchronous wheel B (19) is provided on the mold-shifting screw sleeve (22), and two synchronous wheels B (19) are vertically arranged up and down.

4. The two-platen electric mold clamping device according to claim 3, characterized in that: A mold shifting screw rod mounting plate (23) is provided on the front mold plate (25), and the screw rod A (17) is positioned on the mold shifting screw rod mounting plate (23) and is fastened with a mold shifting screw rod nut (24).

5. The two-platen electric mold clamping device according to claim 1, characterized in that: The two-plate machine is provided with a front template (25) and a tie rod (2), the front template (25) is provided with a head plate tie rod copper sleeve (28), one end of the head plate tie rod copper sleeve (28) and the tie rod nut (27) are connected by a spherical arc surface, the tie rod (2) is concentric with the head plate tie rod copper sleeve (28) and the tie rod nut (27), and is screwed with the tie rod nut (27), and the tie rod pressure plate (26) is used to fix the tie rod (2) to prevent the tie rod (2) from moving forward and backward.

6. The two-platen electric mold clamping device according to claim 1, characterized in that: The movable platen (1) is provided with four ejector guide rods (33), and an ejector guide rod fixing plate (30) is concentrically provided on the ejector guide rod (33). An ejector bearing locating seat (40) is fixed on the ejector guide rod fixing plate (30), and a bearing C (41) is installed on the ejector bearing locating seat (40).

7. The two-platen electric mold clamping device according to claim 6, characterized in that: It also includes an ejection guide plate (35), a ball screw nut (34) is arranged on the ejection guide plate (35), an ejection motor adjustment plate (32) is arranged on the ejection guide rod fixing plate (30), a tensioning block B (31) is arranged on the ejection motor adjustment plate (32), and a servo motor (29) is arranged on the ejection motor adjustment plate (32).

8. The two-platen electric mold clamping device according to claim 7, characterized in that: A tension wheel positioning shaft (47) is arranged on the ejection guide rod fixing plate (30), the tension wheel positioning shaft (47) is fixed by a positioning shaft pressing sleeve (46), a bearing D (48) is installed on the tension wheel positioning shaft (47), the electric ejection mechanism comprises a synchronous wheel D (43), a synchronous wheel D (43) and a synchronous wheel C (39), when the servo motor (29) rotates, the synchronous wheel D (43) drives the synchronous wheel D (43) and the synchronous wheel C (39) to rotate together, the synchronous wheel E (44) is connected and fixed to the screw rod B (36), the screw rod B (36) is provided with a ball screw nut (34), the ball screw nut (34) is connected to the ejection guide plate (35), the screw rod B (36) drives the ball screw nut (34), thereby driving the ejection guide plate (35) to reciprocate back and forth.

9. The two-platen electric mold clamping device according to claim 1, characterized in that: The brake nut structure comprises a brake nut (56), a brake pressure plate (54), the brake pressure plate (54) being fixed on a brake nut connecting plate (58), and having four upper and lower parts, the brake pressure plate (54) clamping the brake nut (56) to limit the position, the brake nut (56) is provided with a symmetrical brake adjustment fixing seat (57), the brake adjustment fixing seat (57) is fixed on the brake nut (56), a brake connecting rod (53) is arranged between the brake nuts (56), the brake connecting rod (53) is connected to a brake adjustment rod (59), a brake motor fixing pad (52) is arranged on the brake nut connecting plate (58), and a reduction motor B (49) is arranged on the brake motor fixing pad (52).

10. The two-platen electric mold clamping device according to claim 9, characterized in that: Four brake nut fixing rods (50) are arranged between the brake nuts (56). The four brake nut fixing rods (50) fix the upper and lower brake nuts (56) in series in an offset manner.

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