Single-servo electrically-driven four-crank type foam forming machine with automatic mold adjusting function

Abstract

The utility model belongs to the technical field of plastic processing, and discloses a single-servo electrically-driven four-crank type foam forming machine with an automatic mold adjusting function. Comprising a rack; the fixed frame is fixedly arranged on the rack; the movable frame moves relative to the fixed frame and is used for being combined with the fixed frame; the four-crank-arm connecting rod mechanism comprises a first servo motor, a commutator, a crank arm and a force arm, the first servo motor is arranged on the movable frame and used for being in transmission connection with the commutator, an output shaft of the commutator is in transmission connection with one end of the crank arm, the other end of the crank arm is hinged to one end of the force arm, and the other end of the force arm is used for being hinged to the fixed frame. By arranging the four-crank-arm connecting rod mechanism, compared with the mode that a hydraulic oil cylinder is used for mold closing and mold opening, the four-crank-arm connecting rod mechanism has the angle self-locking function, large counter-acting force is locked through small action through the angle self-locking function, the problem that the mold opening and closing speed is reduced when the needed locking force is large cannot be generated, and the mold opening and closing speed can be increased easily.

Description

Technical Field

[0001] The utility model belongs to the technical field of plastic processing, and particularly relates to a single servo electric drive four-crank type foam molding machine with automatic mold adjustment. Background Art

[0002] The opening, closing and locking of the mobile template of traditional semi-automatic or fully automatic compression molding equipment requires a hydraulic cylinder to complete. When the mobile template is closed to the fixed template, the piston rod cannot continue to extend. At this time, the hydraulic system will provide high-pressure oil to the hydraulic cylinder to complete the locking of the mobile template. The locking pressure is generally 11-20Mpa.

[0003] However, when using traditional oil cylinders to drive mold opening and closing, when the required locking force is relatively large, the piston area of ​​the hydraulic cylinder needs to be increased. The increase in the piston area will lead to a decrease in the operating speed of the hydraulic cylinder, slow mold opening and closing speed, and low efficiency. Utility Model Content

[0004] The utility model aims to solve the problem that the conventional oil cylinder used in the prior art for opening and closing the mold is slow, and proposes the following technical solutions:

[0005] A single servo electric drive four-crank type foam molding machine with automatic mold adjustment, comprising:

[0006] frame;

[0007] A fixed frame, the fixed frame is fixedly arranged on the frame;

[0008] A moving frame, the moving frame moves relative to the fixed frame and is used for closing the mold with the fixed frame;

[0009] A four-bend linkage mechanism, the four-bend linkage mechanism includes a first servo motor, a commutator, a crank arm and a force arm, the first servo motor is arranged on the moving frame, and is used to be connected to the commutator in transmission, the output shaft of the commutator is connected to one end of the crank arm in transmission, the other end of the crank arm is hinged to one end of the force arm, and the other end of the force arm is used to be hinged to the fixed frame.

[0010] As a preferred embodiment of the above technical solution, the four-bend linkage mechanism further includes a first reducer, the first servo motor is transmission-connected to the first reducer, and the first reducer is transmission-connected to the commutator.

[0011] As a preferred embodiment of the above technical solution, two commutators are provided, and the output directions of the two commutators are opposite, four crank arms and four force arms are provided, each commutator is connected to two crank arms, and the four force arms are connected to the four crank arms one by one.

[0012] As a preferred embodiment of the above technical solution, the four-crank arm linkage mechanism also includes an expansion sleeve, one of the crank arms is fixedly connected to the output shaft of the commutator, and the remaining crank arms are connected to the output shaft of the commutator by the expansion sleeve.

[0013] As a preferred embodiment of the above technical solution, the four-crank arm linkage mechanism also includes a hinge pin, and the crank arm and the force arm are connected through the hinge pin.

[0014] As a preferred embodiment of the above technical solution, the single-servo electric-driven four-crank foam molding machine with automatic mold adjustment also includes a mold adjustment mechanism, which includes a gear box, a driving gear, a nut gear, a screw, a second servo motor and a second reducer. The gear box is arranged on the fixed frame, the driving gear and the nut gear are both located in the gear box, the driving gear is meshed with the nut gear, the second reducer is arranged on the outer side wall of the gear box, the second servo motor is transmission-connected to the second reducer, the second reducer is transmission-connected to the driving gear, one end of the screw is connected to the nut gear, and the other end is hinged to the crank arm.

[0015] As a preferred embodiment of the above technical solution, the single-servo electric drive four-crank foam molding machine with automatic mold adjustment also includes a front frame and a guide mechanism, the front frame and the fixed frame are respectively located on both sides of the frame, the guide mechanism includes a guide rod and a guide sleeve, one end of the guide rod is connected to the front frame, and the other end is connected to the fixed frame, the guide sleeve is slidably connected to the guide rod, and the movable frame is connected to the guide sleeve.

[0016] The beneficial effects of the utility model are:

[0017] (1) By setting a four-cranked arm linkage mechanism, the first servo motor, commutator, crank arm and lever arm in the four-cranked arm linkage mechanism are used, wherein the first servo motor is set on the moving frame and is used to be connected to the commutator in transmission, the output shaft of the commutator is connected to one end of the crank arm in transmission, the other end of the crank arm is hinged to one end of the lever arm, and the other end of the lever arm is hinged to the fixed frame. Then, starting the first servo motor can drive the moving frame to move relative to the fixed frame, so that the moving frame and the fixed frame are molded. Therefore, by setting a four-cranked arm linkage mechanism, compared with using a hydraulic cylinder for mold closing and mold opening, it has a self-locking angle function, and the self-locking angle is used to achieve a small action to lock a large reaction force, and the problem of slowing down the mold opening and closing speed when the required locking force is large will not occur, which is conducive to improving the speed of mold opening and closing. At the same time, by setting a four-cranked arm linkage mechanism, compared with the problem of the need to replace the hydraulic oil of the hydraulic cylinder, the use cost can be reduced, and waste oil that pollutes the environment will not be generated. In addition, during the movement of the crank arm, the noise is small, which is conducive to maintaining a quiet working environment;

[0018] (2) When adjusting different mold thicknesses, the second servo motor is started, the second servo motor drives the second reducer to operate, the second reducer drives the driving gear to rotate, the driving gear drives the nut gear to rotate, the nut gear rotates relative to the screw rod, and the screw rod nut is arranged on the gear box body, which drives the screw rod to move linearly in the front and rear directions, thereby achieving the effect of adjusting different mold thicknesses;

[0019] (3) By setting the front frame, it is convenient to set the guide rod between the front frame and the fixed frame. At the same time, by connecting the moving frame with the guide sleeve, the guide sleeve moves along the guide rod, and the moving frame always moves in the front-to-back direction, thereby ensuring that the moving frame can accurately close the mold with the fixed frame. Compared with the hydraulic cylinder, the single servo electric drive four-crank foam molding machine with automatic mold adjustment can improve the mold closing accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 The structure diagram of the single servo electric drive four-crank type foam molding machine with automatic mold adjustment in the embodiment is shown;

[0021] Figure 2 The structure diagram of the moving frame and the four-bend connecting rod mechanism in the embodiment is shown;

[0022] Figure 3 The structure diagram of the moving frame and the four-bend link mechanism in another perspective in the embodiment is shown;

[0023] Figure 4 What is shown is a structural schematic diagram of a fixed frame and a mold adjustment mechanism in an embodiment;

[0024] Figure 5 It shows Figure 4 A magnified image of area A;

[0025] Figure 6 It shows Figure 4 Magnified view of area B.

[0026] In the figure: 1, frame; 21, fixed frame; 22, moving frame; 23, front frame; 3, four-crank arm connecting rod mechanism; 31, first servo motor; 32, commutator; 33, crank arm; 34, force arm; 35, first reducer; 36, hinge pin; 37, expansion sleeve; 4, mold adjustment mechanism; 41, gear box; 42, driving gear; 43, nut gear; 44, screw rod; 45, second servo motor; 46, second reducer; 5, guide mechanism; 51, guide rod; 52, guide sleeve. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solution and advantages of the embodiments of the present utility model clearer, the technical solution of the present utility model will be clearly and completely described below in conjunction with the embodiments.

[0028] The utility model establishes an XYZ axis coordinate system, wherein the positive direction of the X axis is the front, the negative direction of the X axis is the back, the positive direction of the Y axis is the left, the negative direction of the Y axis is the right, the positive direction of the Z axis is the top, and the negative direction of the Z axis is the bottom.

[0029] like Figure 1-Figure 3 As shown, a single servo electric drive four-crank type foam molding machine with automatic mold adjustment according to an embodiment of the utility model comprises:

[0030] Rack 1;

[0031] A fixed frame 21, the fixed frame 21 is fixedly arranged on the frame 1;

[0032] The moving frame 22 moves relative to the fixed frame 21 and is used for closing the mold with the fixed frame 21;

[0033] The four-bend linkage mechanism 3 includes a first servo motor 31, a commutator 32, a crank arm 33 and a force arm 34. The first servo motor 31 is arranged on the shifting frame 22 and is used for transmission connection with the commutator 32. The output shaft of the commutator 32 is transmission connected with one end of the crank arm 33. The other end of the crank arm 33 is hinged to one end of the force arm 34. The other end of the force arm 34 is used for hinged to the fixed frame 21.

[0034] Specifically, the moving frame 22 is a moving template, and the fixed frame 21 is a fixed template. At the same time, the output shaft of the first servo motor 31 faces the front-to-back direction, and the output shaft of the commutator 32 also faces the front-to-back direction.

[0035] In this embodiment, during the mold closing process, by starting the first servo motor 31 for forward rotation, the first servo motor 31, the commutator 32, the crank arm 33 and the force arm 34 are sequentially connected for transmission, and the first servo motor 31 drives the crank arm 33 through the commutator 32 to rotate clockwise at the hinge between the crank arm 33 and the force arm 34. During the rotation of the crank arm 33, the force arm 34 can be driven to rotate counterclockwise at the hinge between the force arm 34 and the fixed frame 21. The crank arm 33 rotates clockwise and the force arm 34 rotates counterclockwise, which will reduce the distance between the moving frame 22 and the fixed frame 21. The fixed frame 21 is fixedly arranged on the frame 1, and the moving frame 22 approaches the fixed frame 21 until the mold is closed. Similarly, during the mold opening process, by starting the first servo motor 31 to reverse, the first servo motor 31 drives the curved arm 33 to rotate counterclockwise at the hinge between the curved arm 33 and the force arm 34 through the commutator 32. During the rotation of the curved arm 33, the force arm 34 can be driven to rotate clockwise at the hinge between the force arm 34 and the fixed frame 21. The curved arm 33 rotates counterclockwise and the force arm 34 rotates clockwise, which will increase the distance between the moving frame 22 and the fixed frame 21. The fixed frame 21 is fixedly arranged on the frame 1, so the moving frame 22 moves away from the fixed frame 21 until the mold is opened.

[0036] In summary, by setting up the four-bend linkage mechanism 3, using the first servo motor 31, commutator 32, crank arm 33 and lever arm 34 in the four-bend linkage mechanism 3, wherein the first servo motor 31 is set on the moving frame 22 and is used for transmission connection with the commutator 32, the output shaft of the commutator 32 is transmission connected with one end of the crank arm 33, the other end of the crank arm 33 is hinged with one end of the lever arm 34, and the other end of the lever arm 34 is used for hinge connection with the fixed frame 21, then starting the first servo motor 31 can drive the moving frame 22 to move relative to the fixed frame 21, so that the moving frame 22 and the fixed frame 21 are molded. Therefore, by setting up the four-bend linkage mechanism 3, compared with using a hydraulic cylinder for mold closing and mold opening, it has a self-locking angle function, and the self-locking angle is used to achieve a small action to lock a large reaction force, and the problem of slowing down the mold opening and closing speed when the required locking force is large will not occur, which is conducive to improving the speed of mold opening and closing. At the same time, by setting the four-arm connecting rod mechanism 3, the use cost can be reduced compared with the problem that the hydraulic oil cylinder needs to replace the hydraulic oil, and no waste oil that pollutes the environment is generated. In addition, during the movement of the crank arm 33, the noise is small, which is conducive to maintaining a quiet working environment.

[0037] Alternatively, if Figure 2 As shown, the four-bend linkage mechanism 3 further includes a first reducer 35 , the first servo motor 31 is transmission-connected to the first reducer 35 , and the first reducer 35 is transmission-connected to the commutator 32 .

[0038] In this embodiment, by providing the first reducer 35 , the output torque of the first servo motor 31 can be increased, so as to facilitate driving the commutator 32 to operate.

[0039] Alternatively, if Figure 1-Figure 3 As shown, there are two commutators 32, and the output directions of the two commutators 32 are opposite. There are four crank arms 33 and four force arms 34, each commutator 32 is connected to two crank arms 33, and the four force arms 34 are connected to the four crank arms 33 in a one-to-one correspondence.

[0040] Specifically, the two commutators 32 are respectively a first commutator 32 and a second commutator 32 , the crank arms 33 are respectively two first crank arms 33 and two second crank arms 33 , and the force arms 34 are respectively two first force arms 34 and two second force arms 34 .

[0041] In this embodiment, the first commutator 32 is arranged on the upper side of the shift frame 22, the output shaft of the first commutator 32 faces the front-rear direction, one end of the two first curved arms 33 are sleeved on the output shaft of the first commutator 32, and the other ends of the two first curved arms 33 are respectively hinged to one end of the two first force arms 34, wherein the middle parts of the two first force arms 34 are both protruding upwards;

[0042] The second commutator 32 is arranged at the lower side of the shift frame 22, and the output shaft of the second commutator 32 faces the front-to-back direction. One ends of the two second curved arms 33 are sleeved on the output shaft of the second commutator 32, and the other ends of the two second curved arms 33 are respectively hinged to one ends of the two second force arms 34, wherein the middle parts of the two second force arms 34 are recessed downward.

[0043] During the mold closing process, by starting the first servo motor 31 for forward rotation, the first servo motor 31 drives the first curved arm 33 to rotate counterclockwise at the hinge between the first curved arm 33 and the first force arm 34 through the first commutator 32. During the rotation of the first curved arm 33, the first force arm 34 can be driven to rotate clockwise at the hinge between the first force arm 34 and the fixed frame 21; at the same time, the first servo motor 31 drives the second curved arm 33 to rotate clockwise at the hinge between the second curved arm 33 and the second force arm 34 through the second commutator 32. During the rotation of the second curved arm 33, the second force arm 34 can be driven to rotate counterclockwise at the hinge between the second force arm 34 and the fixed frame 21. The first crank arm 33 rotates counterclockwise, the first force arm 34 rotates clockwise, the second crank arm 33 rotates clockwise, and the first force arm 34 rotates counterclockwise, which will reduce the distance between the moving frame 22 and the fixed frame 21. The fixed frame 21 is fixed on the frame 1, and the moving frame 22 approaches the fixed frame 21 until the mold is closed.

[0044] During the mold opening process, by starting the first servo motor 31 to reverse, the first servo motor 31 drives the first crank arm 33 to rotate clockwise at the hinge of the first crank arm 33 and the first force arm 34 through the first commutator 32. During the rotation of the first crank arm 33, the first force arm 34 can be driven to rotate counterclockwise at the hinge of the first force arm 34 and the fixed frame 21; at the same time, the first servo motor 31 drives the second crank arm 33 to rotate counterclockwise at the hinge of the second crank arm 33 and the second force arm 34 through the second commutator 32. During the rotation of the second crank arm 33, the second force arm 34 can be driven to rotate clockwise at the hinge of the second force arm 34 and the fixed frame 21. The first crank arm 33 rotates clockwise, the first force arm 34 rotates counterclockwise, the second crank arm 33 rotates counterclockwise, and the first force arm 34 rotates clockwise, which will increase the distance between the moving frame 22 and the fixed frame 21, and the fixed frame 21 is fixedly arranged on the frame 1, so the moving frame 22 is away from the fixed frame 21 until the mold is opened.

[0045] Therefore, by setting two commutators 32 and respectively setting four crank arms 33 and force arms 34, the moving frame 22 can be driven by the four crank arms 33 and force arms 34 to move the fixed frame 21 first, thereby ensuring the accuracy of mold opening and closing.

[0046] Alternatively, if Figure 2 and Figure 3As shown, the four-crank arm linkage mechanism 3 also includes an expansion sleeve 37 , one crank arm 33 is fixedly connected to the output shaft of the commutator 32 , and the remaining crank arms 33 are connected to the output shaft of the commutator 32 by expansion sleeves 37 .

[0047] In this embodiment, the crank arm 33 fixedly connected to the output shaft of the commutator 32 is not the active crank arm 33, and the remaining crank arms 33 connected to the output shaft of the commutator 32 by expansion sleeves 37 are passive crank arms 33, which is conducive to ensuring synchronous movement of the four crank arms 33.

[0048] Alternatively, if Figure 2 and Figure 3 As shown, the four-bend linkage mechanism 3 further includes a hinge pin 36 , and the crank arm 33 and the force arm 34 are connected via the hinge pin 36 .

[0049] In this embodiment, the curved arm 33 is connected to the lever arm 34 by the hinge pin 36 , so that the curved arm 33 and the lever arm 34 can be detachably connected, which is beneficial for replacing the curved arm 33 or the lever arm 34 .

[0050] Alternatively, if Figure 1 , Figure 4 , Figure 5 as well as Figure 6 As shown, the single servo electric drive four-crank type foam molding machine with automatic mold adjustment also includes a mold adjustment mechanism 4, which includes a gear box 41, a driving gear 42, a nut gear 43, a screw 44, a second servo motor 45 and a second reducer 46. The gear box 41 is arranged on the fixed frame 21, the driving gear 42 and the nut gear 43 are both located in the gear box 41, the driving gear 42 is meshed with the nut gear 43, the second reducer 46 is arranged on the outer side wall of the gear box 41, the second servo motor 45 is transmission-connected to the second reducer 46, the second reducer 46 is transmission-connected to the driving gear 42, one end of the screw 44 is connected to the nut gear 43, and the other end is hinged to the crank arm 33.

[0051] Specifically, four mold adjustment mechanisms 4 are provided, wherein: Figure 5 The figure shows the exploded structure of the mold adjustment mechanism 4. Figure 6 What is shown is a schematic diagram of the overall structure of the mold adjustment mechanism 4.

[0052] In this embodiment, when adjusting different mold thicknesses, by starting the second servo motor 45, the second servo motor 45 drives the second reducer 46 to operate, the second reducer 46 drives the driving gear 42 to rotate, the driving gear 42 drives the nut gear 43 to rotate, the nut gear 43 rotates relative to the screw rod 44, and the screw rod 44 nut is set on the gear box body 41, then it drives the screw rod 44 to move linearly in the front and rear directions, thereby achieving the effect of adjusting different mold thicknesses.

[0053] Alternatively, if Figure 1 and Figure 2 As shown, the single servo electric drive four-crank type foam molding machine with automatic mold adjustment also includes a front frame 23 and a guide mechanism 5. The front frame 23 and the fixed frame 21 are respectively located on both sides of the frame 1. The guide mechanism 5 includes a guide rod 51 and a guide sleeve 52. One end of the guide rod 51 is connected to the front frame 23, and the other end is connected to the fixed frame 21. The guide sleeve 52 is slidably connected to the guide rod 51, and the moving frame 22 is connected to the guide sleeve 52.

[0054] Specifically, the axial direction of the guide rod 51 is oriented in the front-rear direction.

[0055] In this embodiment, by setting the front frame 23, the guide rod 51 can be conveniently set between the front frame 23 and the fixed frame 21. At the same time, by connecting the movable frame 22 with the guide sleeve 52, the guide sleeve 52 moves along the guide rod 51, and the movement direction of the movable frame 22 is always along the front-to-back direction, thereby ensuring that the movable frame 22 can be accurately molded with the fixed frame 21. Compared with the hydraulic cylinder, the single servo electric drive four-crank foam molding machine with automatic mold adjustment can improve the mold clamping accuracy.

[0056] The above embodiments are only used to illustrate the technical solution of the present invention, but not to limit it.

Claims

1. A single servo electric drive four-crank type foam molding machine with automatic mold adjustment, characterized in that: include: Rack (1); A fixed frame (21), the fixed frame (21) being fixedly arranged on the frame (1); A moving frame (22), the moving frame (22) moves relative to the fixed frame (21) and is used for closing the mold with the fixed frame (21); A four-bend linkage mechanism (3), the four-bend linkage mechanism (3) comprising a first servo motor (31), a commutator (32), a crank arm (33) and a force arm (34), the first servo motor (31) being arranged on the shifting frame (22) and being used for being transmission-connected with the commutator (32), the output shaft of the commutator (32) being transmission-connected with one end of the crank arm (33), the other end of the crank arm (33) being hinged with one end of the force arm (34), and the other end of the force arm (34) being used for being hinged with the fixed frame (21).

2. The single servo electric drive four-crank type foam forming machine with automatic mold adjustment according to claim 1, characterized in that: The four-crank linkage mechanism (3) further comprises a first reducer (35), the first servo motor (31) is in transmission connection with the first reducer (35), and the first reducer (35) is in transmission connection with the commutator (32).

3. The single servo electric drive four-crank type foam molding machine with automatic mold adjustment according to claim 1, characterized in that: Two commutators (32) are provided, and the output directions of the two commutators (32) are opposite. Four crank arms (33) and four force arms (34) are provided. Each commutator (32) is connected to two crank arms (33), and the four force arms (34) are connected to the four crank arms (33) in a one-to-one correspondence.

4. The single servo electric drive four-crank type foam forming machine with automatic mold adjustment according to claim 3, characterized in that: The four-crank arm connecting rod mechanism (3) also includes an expansion sleeve (37), one of the crank arms (33) is fixedly connected to the output shaft of the commutator (32), and the remaining crank arms (33) are connected to the output shaft of the commutator (32) by expansion sleeves (37).

5. The single servo electric drive four-crank type foam molding machine with automatic mold adjustment according to claim 1, characterized in that: The four-crank arm linkage mechanism (3) further comprises a hinge pin (36), and the crank arm (33) and the force arm (34) are connected via the hinge pin (36).

6. The single servo electric drive four-crank type foam molding machine with automatic mold adjustment according to claim 1, characterized in that: The invention also comprises a mold adjustment mechanism (4), the mold adjustment mechanism (4) comprising a gear box (41), a driving gear (42), a nut gear (43), a screw rod (44), a second servo motor (45) and a second reducer (46); the gear box (41) is arranged on the fixed frame (21); the driving gear (42) and the nut gear (43) are both located in the gear box (41); the driving gear (42) is meshed with the nut gear (43); the second reducer (46) is arranged on the outer side wall of the gear box (41); the second servo motor (45) is transmission-connected with the second reducer (46); the second reducer (46) is transmission-connected with the driving gear (42); one end of the screw rod (44) is connected with the nut gear (43); and the other end is hinged to the crank arm (33).

7. The single servo electric drive four-crank foam forming machine with automatic mold adjustment according to any one of claims 1 to 6, characterized in that: The machine also comprises a front frame (23) and a guide mechanism (5), wherein the front frame (23) and the fixed frame (21) are respectively located on two sides of the frame (1), and the guide mechanism (5) comprises a guide rod (51) and a guide sleeve (52), one end of the guide rod (51) is connected to the front frame (23), and the other end is connected to the fixed frame (21), the guide sleeve (52) is slidably connected to the guide rod (51), and the movable frame (22) is connected to the guide sleeve (52).

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