Mold closing device for producing traceless thin-wall injection molding part

Abstract

The invention relates to a mold closing device for producing traceless thin-wall injection molding parts, and relates to the field of injection molding devices, the mold closing device comprises a static mold arranged on a workbench and a plurality of movable molds, the side, facing the static mold, of each movable mold is provided with a mold cavity, the movable molds and the static mold are both provided with injection molding holes, and the workbench is provided with a guide rod; the guide rods are used for guiding the movable molds to slide, a driving unit is arranged on the workbench and used for driving the movable molds and the static molds to be opened and closed, each movable mold is provided with a cutting unit, the cutting units are used for cutting injection molding parts in the injection molding holes, and a plurality of clamping and discharging units are arranged on the workbench and used for clamping the injection molding parts and moving. And the clamping and discharging units correspond to the movable molds one to one, and pushing units are arranged on the clamping and discharging units and used for pushing injection molding parts out of the mold cavities. The injection molding device has the effects that multiple injection molding parts are subjected to injection molding in the single injection molding process, and the production efficiency of the injection molding parts is improved.

Description

Technical Field

[0001] The invention relates to the field of injection molding devices, in particular to a mold clamping device for producing traceless thin-wall injection molding parts. Background Art

[0002] In the production of injection molded parts, more and more manufacturers choose seamless injection molding to perform injection molding. Seamless injection molding can eliminate weld lines, weld marks, ripples and silver lines on the product surface, completely solve the surface shrinkage phenomenon of plastic products, and make the surface finish of the product reach the mirror level. It can almost completely reproduce the surface state of the mold to achieve a seamless effect. Therefore, it is widely used in LCD TVs, computer LCD monitors, car LCD monitors, air conditioners, car interiors, car lights, optical instruments and other home appliances, automobiles, communications, medical and other industries.

[0003] In the traditional seamless injection molding process, an injection molding machine is usually used to perform injection molding on a set of dynamic and static molds, and then the molds are cooled and opened. However, this will result in only one injection molded part being produced during one injection molding process, resulting in low production efficiency of injection molded parts. Summary of the Invention

[0004] In order to improve the problem of low production efficiency of injection molded parts, the present invention provides a mold clamping device for producing seamless thin-walled injection molded parts.

[0005] The present invention provides a mold clamping device for producing seamless thin-walled injection molded parts, which adopts the following technical solution: A mold clamping device for producing seamless thin-walled injection molded parts, comprising a static mold and several dynamic molds arranged on a workbench, each of the dynamic molds being provided with a mold cavity on a side facing the static mold, and both the dynamic mold and the static mold being provided with injection holes, a guide rod being provided on the workbench, the guide rod being used to guide the sliding of the dynamic mold, a drive unit being provided on the workbench, the drive unit being used to drive the opening and closing of the molds between the dynamic mold and the static mold, each of the dynamic molds being provided with a cutting unit, the cutting unit being used to cut the injection molded parts in the injection holes, a plurality of clamping and unloading units being provided on the workbench, the clamping and unloading units being used to clamp and move the injection molded parts, the clamping and unloading units being in one-to-one correspondence with the dynamic molds, and a pushing unit being provided on the clamping and unloading units, the pushing unit being used to push the injection molded parts out of the mold cavity.

[0006] By adopting the above technical solution, during injection molding, the driving unit drives the movable mold to slide toward the static mold, and the movable mold slides along the guide rod, so that the movable mold and the movable mold, and the movable mold and the static mold are closed, and then injection is performed into the mold cavity through the injection hole. After the injection molded part cools down, the injection molded part in the injection hole is cut by the cutting unit, so that the injection molded parts are separated from each other, and then the driving unit drives the movable mold and the movable mold, and the movable mold and the static mold to slide away from each other to perform the mold opening operation, and then the clamping and unloading unit is moved to the injection molded part and connected to the injection molded part, and then the pushing unit is inserted into the injection hole to eject the injection molded part in the mold cavity, and then the injection molded part is removed and unloaded by the clamping and unloading unit, thereby realizing the injection molding of multiple injection molded parts in a single injection molding process, thereby improving the production efficiency of injection molded parts.

[0007] In a specific possible implementation scheme, the driving unit includes a first motor, a bevel gear set and a rotating rod. The bevel gear set and the rotating rod correspond to the movable mold one by one. The first motor is arranged on the workbench. The output shaft end of the first motor is coaxially provided with a drive shaft. The rotating rod is rotatably arranged on the movable mold. The drive shaft drives the rotating rod to rotate through the bevel gear set. A first spur gear is coaxially fixed on the rotating rod. A first rack for meshing with the first spur gear is provided on the workbench. The first spur gear can drive the movable mold to slide.

[0008] By adopting the above technical solution, when driving the movable mold, the first motor drives the driving shaft to rotate, the driving shaft drives the rotating rod to rotate through the bevel gear set, the rotating rod drives the first spur gear to rotate and slide along the first rack, and the rotating rod drives the bevel gear set and the movable mold to slide, thereby realizing the driving of the movable mold.

[0009] In a specific possible implementation scheme, the bevel gear set includes a first bevel gear and a second bevel gear that mesh with each other, the first bevel gear is coaxially arranged on the drive shaft, the second bevel gear is coaxially fixed on the rotating rod, the drive shaft is provided with a guide groove along its axial direction, and the first bevel gear is provided with a guide block for sliding in the guide groove.

[0010] By adopting the above technical solution, when the driving shaft drives the rotating rod to rotate, the driving shaft engages with the guide block through the guide groove, so that the driving shaft can drive the first bevel gear to rotate, and the first bevel gear drives the rotating rod to rotate through the second bevel gear. When the rotating rod slides, the rotating rod pushes the first bevel gear to slide on the driving shaft through the second bevel gear, thereby realizing transmission between the driving shaft and the rotating rod.

[0011] In a specific possible implementation manner, in two adjacent groups of bevel gear sets, the transmission ratio of the group of bevel gear sets far away from the static mold is greater than the transmission ratio of the other group of bevel gear sets.

[0012] By adopting the above technical solution and setting different transmission ratios, the sliding speed of the movable mold is different, so that when the mold is opened, the movable mold can be opened at the same time, thereby reducing the mold opening time and improving the overall injection molding efficiency.

[0013] In a specific possible implementation scheme, a connecting box is provided on the sliding sleeve of the drive shaft, the first bevel gear and the second bevel gear are both located in the connecting box, the rotating rod passes through the connecting box and is rotatably arranged, and the first bevel gear is in contact with the inner wall of the connecting box.

[0014] By adopting the above technical solution, when the first bevel gear slides on the drive shaft, the drive shaft can drive the first bevel gear to slide in both directions through the fit between the connecting box and the first bevel gear, thereby improving the transmission stability between the first bevel gear and the second bevel gear.

[0015] In a specific possible implementation scheme, the cutting unit includes a cutter and a cylinder, the cylinder is arranged on the movable mold, the cutter is slidably arranged on the movable mold, the tip of the cutter can penetrate into the injection hole, and the piston end of the cylinder is connected to the cutter.

[0016] By adopting the above technical solution, when the injection molded part cools down, the cylinder drives the cutter to be inserted into the injection hole, and the cutter cuts the injection molded part in the injection hole, so that two adjacent injection molded parts are separated from each other, thereby improving the convenience of unloading the injection molded parts.

[0017] In a specific feasible implementation scheme, the clamping and unloading unit includes a unloading rod and a suction cup. A support rod is provided on the workbench. A driving sleeve is provided on the rotating sleeve of the support rod. The driving sleeve corresponds to the unloading rod one-to-one. The unloading rod is arranged on the driving sleeve. The driving sleeve is used to drive the unloading rod to move to the mold cavity. The suction cup is arranged on the unloading rod and is used to adsorb the injection molded parts in the mold cavity. A vacuum generator is provided on the workbench, and the vacuum generator is connected to each of the suction cups through a connecting pipe.

[0018] By adopting the above technical solution, when the injection molded part in the mold cavity is unloaded, the driving sleeve is first driven to rotate around the support rod, and the driving sleeve rotates the disassembly rod between the movable molds. The suction cup is now located at the injection molded part, and then the vacuum generator is turned on. The vacuum generator drives the suction cup to be adsorbed on the injection molded part through the connecting pipe. The adsorption of the injection molded part by the suction cup can reduce the impact of the injection molded part when unloading.

[0019] In a specific possible implementation scheme, the pushing unit includes a pushing rod, a support rod and a driving member, the support rod is provided with a rotating sleeve, the support rod is arranged on the rotating sleeve, the pushing rod is rotatably arranged on the support rod, the driving member is arranged on the rotating sleeve, and the driving member can drive the pushing rod to be inserted into the injection hole.

[0020] By adopting the above technical solution, when the suction cup is adsorbed on the injection molded part, the rotating sleeve drives the support rod to rotate to the back of the movable mold, and then the driving part drives the ejector rod to be inserted into the injection hole to eject the injection molded part in the mold cavity, thereby improving the convenience of unloading the injection molded part. At the same time, it can push out the cut debris in the injection hole to achieve the cleaning of the injection hole.

[0021] In a specific possible implementation scheme, the driving member includes a rotating motor, a driving sprocket, a driven sprocket and a chain, the rotating motor is arranged on the rotating sleeve, the driving sprocket is rotatably arranged on the rotating sleeve, the driven chain is coaxially slidably arranged on the support rod, the push rod is threadedly connected to the driven chain, the support rod can limit the axial sliding of the driven sprocket, the driving sprocket and the driven sprocket are connected by the chain, and the rotating motor and the driving sprocket are connected by a connecting member.

[0022] By adopting the above technical solution, when the injection molded part is ejected, the first motor drives the driving sprocket to rotate through the connecting part, and the driving sprocket drives the ejector rod to rotate through the chain. The ejector rod slides toward the injection hole through the threaded connection between it and the driven sprocket, and is finally inserted into the injection hole, thereby realizing the ejection of the injection molded part.

[0023] In a specific possible implementation scheme, the connecting member includes a reciprocating screw, a second rack and a second spur gear. The reciprocating screw is coaxially arranged on the output shaft of the rotating motor. The second rack is arranged on the reciprocating screw and is threadedly connected. The second spur gear is rotatably arranged on the rotating sleeve and is used to drive the active sprocket to rotate. The second spur gear is engaged with the second rack. A driving screw is coaxially fixed on the reciprocating screw, and the driving screw is threadedly connected to the driving sleeve.

[0024] By adopting the above technical solution, when the push rod is driven, the first motor drives the reciprocating screw to rotate, the reciprocating screw drives the second rack to slide in one direction, the second rack drives the second bevel gear to rotate, the second spur gear drives the active sprocket to rotate, and the push rod pushes the injection molded part. At the same time, the rotating motor drives the driving sleeve to slide through the driving screw, and the driving sleeve drives the injection molded part to slide out of the mold cavity through the suction cup, thereby realizing the push of the push rod and the adaptation of the suction cup, improving the stability of the injection molded part out of the mold cavity, and at the same time, with the drive of the rotating motor, the reciprocating screw drives the second rack to slide in the opposite direction. At this time, the push rod slides out of the injection hole, and then the rotating sleeve is rotated. The rotating sleeve drives the driving sleeve to rotate, and the injection molded part is turned out of the mold, thereby realizing the unloading of the injection molded part.

[0025] In summary, the present invention includes at least one of the following beneficial technical effects: During injection molding, the driving unit drives the movable mold and the movable mold, and the movable mold and the static mold to close the mold, and then injects the mold into the mold cavity through the injection hole. After the injection molded part cools down, the cutting unit cuts the injection molded part in the injection hole. Then, the driving unit drives the movable mold and the movable mold, and the movable mold and the static mold to slide away from each other. Then, the clamping and unloading unit is moved to the injection molded part and connected to the injection molded part. Then, the ejecting unit is inserted into the injection hole to eject the injection molded part in the mold cavity. Then, the clamping and unloading unit is used to remove the injection molded part and unload it, thereby realizing the injection molding of multiple injection molded parts in a single injection molding process, thereby improving the production efficiency of injection molded parts. By setting different transmission ratios of the first bevel gear and the second bevel gear, the sliding speed of the movable mold is different, so that when the mold is opened, the movable mold can be opened at the same time, thereby reducing the mold opening time and improving the overall injection molding efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 The present invention is a schematic structural diagram of a mold clamping device for producing seamless thin-walled injection molded parts according to an embodiment of the present invention.

[0027] Figure 2 It is along Figure 1 Sectional view along line AA.

[0028] Figure 3 yes Figure 2 Enlarged view of part B in the middle.

[0029] Figure 4 yes Figure 2 Enlarged view of part C in the middle.

[0030] Figure 5 It is a schematic diagram for showing the structure of the clamping and unloading unit.

[0031] Figure 6 It is a schematic diagram for showing the structure of the push unit.

[0032] Figure 7 It is along Figure 6 Cross-sectional view along line EE.

[0033] Figure 8 yes Figure 5 Enlarged view of part D in the middle.

[0034] Explanation of the accompanying symbols: 1. workbench; 11. guide rod; 12. injection molding equipment; 13. injection molded part; 21. static mold; 22. dynamic mold; 23. mold cavity; 24. injection hole; 3. drive unit; 31. first motor; 32. bevel gear set; 321. first bevel gear; 322. second bevel gear; 323. guide block; 33. rotating rod; 34. drive shaft; 341. guide groove; 35. connecting box; 36. first rack; 37. first straight gear; 4. cutting unit; 41. cutter; 42. cylinder; 43. cutting hole; 5. clamping and unloading unit; 51. unloading rod; 52. suction cup; 53. electric cylinder; 5 4. Vacuum generator; 55. Connecting pipe; 6. Push unit; 61. Push rod; 62. Support rod; 63. Driving member; 631. Rotating motor; 632. Driving sprocket; 633. Driven sprocket; 634. Chain; 635. Limiting groove; 64. Connecting member; 641. Reciprocating screw; 642. Second rack; 643. Second spur gear; 644. Slider; 645. Third bevel gear; 646. Fourth bevel gear; 65. Driving screw; 66. Bump; 71. Second motor; 72. Gear shaft; 73. Connecting gear; 74. Support rod; 75. Driving sleeve; 76. Rotating sleeve; 77. Connecting rack. Implementation Method

[0035] The following is combined with Figure 1-8 The present invention is described in further detail.

[0036] An embodiment of the present invention discloses a mold clamping device for producing seamless thin-walled injection molded parts.

[0037] Reference Figure 1 、 Figure 2A mold clamping device for producing seamless thin-walled injection molded parts includes a static mold 21 and a plurality of dynamic molds 22 arranged on a workbench 1. In this embodiment, the number of dynamic molds 22 is three, and the three dynamic molds 22 are arranged in sequence. The static mold 21 is fixedly arranged on the workbench 1, and a guide rod 11 is provided on the workbench 1. In this embodiment, the number of guide rods 11 is three, and the three guide rods 11 are arranged parallel to each other. One end of the guide rod 11 is fixed to the workbench 1, and the other end of the guide rod 11 is fixedly connected to the static mold 21. The guide rod 11 passes through each dynamic mold 22 in sequence and is slidably arranged. The three guide rods 11 are arranged at three angles of the dynamic mold 22. Each dynamic mold 22 is provided with a mold cavity 23 on the side facing the static mold 21. The dynamic mold 22 and the static mold 21 are each provided with an injection hole 24, and an injection molding device 12 is provided on the workbench 1. The injection molding device 12 is arranged on the side of the static mold 21 away from the movable mold 22. The injection molding device 12 is used to inject the material into the mold cavity 23. Each movable mold 22 is provided with a cooling device (not shown in the drawings). The injection molding process in this embodiment adopts thermal variable temperature seamless injection molding technology. After the mold is closed (in special cases, the mold can be opened and heated), high-temperature steam is blown into it. First, the mold temperature is raised to a heating set value, and then plastic is injected into the mold cavity 23. After the injection molding machine completes injection / pressure holding and turns to cooling, cold water is started to be injected. After the mold temperature quickly drops to a cooling set value, the mold is opened, and then air is blown into the mold to completely blow away the cold water to complete the entire injection molding process.

[0038] Reference Figure 1 、 Figure 2 A driving unit 3 is provided on the workbench 1, and the driving unit 3 is used to drive the opening and closing of the movable mold 22 and the static mold 21. Each movable mold 22 is provided with a cutting unit 4, and the cutting unit 4 is used to cut the injection molded part 13 in the injection hole 24. A plurality of clamping and unloading units 5 are provided on the workbench 1, and the clamping and unloading units 5 are used to clamp and move the injection molded part 13. The clamping and unloading units 5 correspond to the movable mold 22 one by one. A pushing unit 6 is provided on the clamping and unloading unit 5, and the pushing unit 6 is used to push the injection molded part 13 out of the mold cavity 23.

[0039] During injection molding, the driving unit 3 drives the movable mold 22 to slide along the guide rod 11 toward the static mold 21, so that the movable mold 22 and the movable mold 22, and the movable mold 22 and the static mold 21 are clamped, and then the injection molding equipment 12 injects the mold into the mold cavity 23 through the injection hole 24, and then the mold is cooled by the cooling device. After the injection molded part 13 is cooled, the cutting unit 4 cuts the injection molded part 13 in the injection hole 24, so that the injection molded parts 13 are separated from each other, and then the driving unit 13 is used to cut the injection molded part 13 into the mold cavity 23. Element 3 drives the movable mold 22 and the movable mold 22, and the movable mold 22 and the static mold 21 to slide apart from each other to perform the mold opening operation, and then moves the clamping and unloading unit 5 to the injection molded part 13 and connects with the injection molded part 13, and then inserts the ejecting unit 6 into the injection hole 24 to eject the injection molded part 13 in the mold cavity 23, and then removes the injection molded part 13 through the clamping and unloading unit 5 and unloads it, thereby realizing the injection molding of multiple injection molded parts 13 in a single injection molding process, thereby improving the production efficiency of the injection molded parts 13.

[0040] Reference Figure 2 、 Figure 3 The driving unit 3 in this embodiment includes a first motor 31, a bevel gear set 32 ​​and a rotating rod 33. In other embodiments, a motor can also be set on each movable mold 22 to drive the movable mold 22 to move separately. The output shaft end of the first motor 31 is coaxially fixed with a driving shaft 34. The driving shaft 34 is arranged along the sliding direction of the movable mold 22. The driving shaft 34 is provided with a guide groove 341 along its own axial direction. The bevel gear set 32 ​​and the transmission member correspond one-to-one with the movable mold 22. The bevel gear set 32 ​​includes a first bevel gear 321 and a second bevel gear 322 that mesh with each other. The first bevel gear 321 is coaxially arranged on the driving shaft 34. The first bevel gear 321 and the driving shaft 34 are slidably arranged. The first bevel gear 321 is provided with a guide block 323 that slides in the guide groove 341.

[0041] Reference Figure 2 、 Figure 3 The first bevel gear 321 is arranged in the connecting box 35, and the first bevel gear 321 is fitted with the inner wall of the connecting box 35, and the second bevel gear 322 is coaxially fixed to the end of the rotating rod 33 inserted into the connecting box 35. The transmission ratio between the first bevel gear 321 and the second bevel gear 322 in each group is greater than the distance from the static mold 21. A first rack 36 is provided on the workbench 1. The first rack 36 is arranged along the axial direction of the driving shaft 34. A first spur gear 37 is coaxially fixed on the rotating rod 33, and the first spur gear 37 is meshed with the first rack 36. When the movable mold 22 is driven, the first motor 31 is turned on, the first motor 31 drives the driving shaft 34 to rotate, the driving shaft 34 drives multiple first bevel gears 321 to rotate, the first bevel gear 321 drives the second bevel gear 322 to rotate, and the second bevel gear 322 drives the first spur gear 37 to rotate through the rotating rod 33. The first spur gear 37 slides along the first rack 36 while rotating, and the rotating rod 33 drives the movable mold 22 and the connecting box 35 to slide, thereby realizing the driving of the movable mold 22, so that the movable mold 22 can perform mold closing and mold opening operations.

[0042] During mold opening and closing operations, by setting different transmission ratios between different groups of first bevel gears 321 and second bevel gears 322, the movable mold 22 at the outermost edge slides faster, and the sliding speed of the movable mold 22 closer to the static mold 21 becomes slower. As a result, when the mold is opened, multiple movable molds 22 can be opened at the same time, thereby reducing the mold opening time and improving the production efficiency of the overall injection molded part 13.

[0043] Reference Figure 2 、 Figure 4 The cutting unit 4 includes a cutter 41 and a cylinder 42. The cylinder 42 can also be replaced by a power device such as a hydraulic cylinder or an electric cylinder. The cylinder 42 is arranged on the top wall of the movable mold 22, and the output shaft of the cylinder 42 faces downward. Each movable mold 22 is provided with a cutting hole 43 connected to the injection hole 24. The cutter 41 is slidably arranged in the cutting hole 43, and the blade end of the cutter 41 is arranged toward the injection hole 24. The back end of the cutter 41 is fixed to the output shaft of the cylinder 42.

[0044] When the injection molded parts 13 have finished cooling, the driving cylinder 42 extends, driving the cutter 41 to slide toward the injection hole 24 and insert into the injection hole 24, cutting the connecting portion between the two injection molded parts 13, so that the two adjacent injection molded parts 13 are separated from each other, improving the convenience of unloading the injection molded parts 13. After the cutting is completed, the cylinder 42 drives the cutter 41 to slide out of the injection hole 24.

[0045] Reference Figure 5 、 Figure 6, a second motor 71 is provided on the workbench 1, and a gear shaft 72 is coaxially provided on the output shaft of the second motor 71. The gear shaft 72 is arranged along the sliding direction of the movable mold 22, and a plurality of connecting gears 73 are coaxially fixed on the gear shaft 72. The connecting gears 73 correspond one to one with the movable mold 22. A support rod 74 is fixed on the workbench 1. The support rod 74 is a round rod. The axis of the support rod 74 is parallel to the axis of the gear shaft 72. A plurality of drive sleeves 75 are provided on the support rod 74. The drive sleeves 75 correspond one to one with the connecting gears 73. The drive sleeves 75 rotate with the support rod 74 The sliding arrangement and the clamping and unloading unit 5 include a unloading rod 51 and a suction cup 52. The unloading rod 51 is fixedly arranged on the driving sleeve 75, and the suction cup 52 is arranged at the end of the unloading rod 51 away from the driving sleeve 75. The unloading rod 51 can extend to the opening of the mold cavity 23. The unloading rod 51 is provided with an electric cylinder 53, and the suction cup 52 is fixedly arranged on the output shaft of the electric cylinder 53. The output shaft of the electric cylinder 53 is arranged toward the opening side of the mold cavity 23. A vacuum generator 54 is provided on the workbench 1, and the vacuum generator 54 is connected to each suction cup 52 through a connecting pipe 55.

[0046] Reference Figure 5 、 Figure 6 and Figure 7 , a plurality of rotating sleeves 76 are provided on the support rod 74, and the rotating sleeves 76 correspond to the driving sleeves 75 one by one. The rotating sleeves 76 can only rotate around the support rod 74, and each rotating sleeve 76 is provided with a connecting rack 77. The connecting rack 77 is arranged along the circumference of the rotating sleeve 76, and the connecting rack 77 is engaged with the connecting gear 73. The pushing unit 6 includes a pushing rod 61, a support rod 62 and a driving member 63. The support rod 62 is fixedly provided on the rotating sleeve 76, and the pushing rod 61 is slidably provided on the support rod 62. The distance from the axis of the pushing rod 61 to the axis of the support rod 74 is equal to the distance from the axis of the injection hole 24 to the axis of the support rod 74. The axis of the pushing rod 61 is parallel to the axis of the support rod 74. The driving member 63 includes a rotating The motor 631, the driving sprocket 632, the driven sprocket 633 and the chain 634, the rotating motor 631 is fixedly set on the rotating sleeve 76, the driving sprocket 632 is rotatably set on one end of the support rod 62 close to the rotating sleeve 76, and the other end of the support rod 62 is provided with a limiting groove 635, the push rod 61 is inserted into the limiting groove 635, the driven sprocket 633 is sleeved on the push rod 61 and placed in the limiting groove 635, the driven sprocket 633 uses the push rod 61 as the rotating axis, and the driven sprocket 633 is in contact with the two side walls of the limiting groove 635, the driving sprocket 632 and the driven sprocket 633 are connected by the chain 634, and the rotating motor 631 and the driving sprocket 632 are connected by the connecting member 64.

[0047] Reference Figure 6 、 Figure 7 and Figure 8The connecting member 64 includes a reciprocating screw 641, a second rack 642 and a second spur gear 643. The rotating motor 631 is a dual-output shaft motor. The reciprocating screw 641 is coaxially arranged at one output shaft end of the rotating motor 631. A slider 644 is sleeved on the reciprocating screw 641. The slider 644 is threadedly connected to the reciprocating screw 641 and slides along the rotating sleeve 76. The second rack 642 is fixedly arranged on the slider 644 along the axial direction of the reciprocating screw 641. The second spur gear 643 is rotatably arranged on the rotating sleeve 76 and meshes with the second rack 642. A third bevel gear 645 is coaxially fixed on the second spur gear 643, and a fourth bevel gear 646 is coaxially fixed on the driving sprocket 632. The third bevel gear 645 is meshed with the fourth bevel gear 646. Initially, the slider 644 is at an extreme position of the reciprocating screw 641, and a driving screw 65 is coaxially fixed on another output shaft of the reciprocating screw 641. A protrusion 66 is provided on the driving sleeve 75. The driving screw 65 passes through the protrusion 66 and is threadedly connected to the protrusion 66. When the mold is opened, the movable mold 22 is located between the push rod 61 and the suction cup 52.

[0048] When the injection molded part 13 is unloaded, the mold is opened, and then the second motor 71 is driven to rotate, and the second motor 71 drives the gear shaft 72 to rotate. The gear shaft 72 drives the rotating sleeve 76 to rotate through the engagement of the connecting gear 73 and the connecting rack 77. The rotating sleeve 76 drives the driving sleeve 75 to rotate through the driving screw 65. At this time, the support rod 62 drives the ejector rod 61 to align with the injection hole 24 on the back of the movable mold 22. The unloading rod 51 drives the suction cup 52 to align with the injection molded part 13, and then the electric cylinder 53 pushes the suction cup 52 toward the injection molded part 13 and squeezes the injection molded part 13, and then the vacuum generator 54 is used. The suction cup 52 is placed in a vacuum to adsorb the injection molded part 13, and then the rotating motor 631 is driven. On the one hand, the rotating motor 631 drives the slider 644 to rotate along the reciprocating screw 641, and the slider 644 drives the second rack 642 to slide in one direction. The second rack 642 drives the second spur gear 643 to rotate. The second spur gear 643 drives the driving sprocket 632 to rotate through the third bevel gear 645 and the fourth bevel gear 646. The driving sprocket 632 drives the driven sprocket 633 to rotate through the chain 634. The driven sprocket 633 drives the push rod 61 to insert into the injection hole 24 to push the injection molded part 13.

[0049] On the other hand, the rotating motor 631 drives the driving sleeve 75 away from the rotating sleeve 76. At this time, the suction cup 52 drives the injection molded part 13 to be pulled out of the mold cavity 23. As the rotating motor 631 continues to rotate, the slider 644 slides to the extreme position of the reciprocating screw 641 and turns. At this time, the push rod 61 begins to be pulled out from the injection hole 24. When the suction cup 52 completely pulls the injection molded part 13 out of the mold cavity 23, the push rod 61 is completely pulled out of the injection hole 24, and then drives the second motor 71 to flip, and the support rod 62 and the unloading rod 51 are both rotated to the bottom of the movable mold 22, thereby realizing the simultaneous unloading of the injection molded parts 13, thereby improving the unloading efficiency of the injection molded parts 13.

[0050] The implementation principle of a mold clamping device for producing seamless thin-walled injection molded parts according to an embodiment of the present invention is as follows: during injection molding, the driving unit 3 drives the movable mold 22 to slide toward the static mold 21, and the movable mold 22 slides along the guide rod 11, so that the movable molds 22 and the movable molds 22 and the static mold 21 are clamped, and then injection is performed into the mold cavity 23 through the injection hole 24. After the injection molded part 13 cools down, the cutting unit 4 cuts the injection molded part 13 in the injection hole 24, so that the injection molded parts 13 are separated from each other. Then, the driving unit 3 drives the movable mold 22 and the movable mold 22, and the movable mold 22 and the static mold 21 to slide apart from each other to perform the mold opening operation, and then the clamping and unloading unit 5 is moved to the injection molded part 13 and connected to the injection molded part 13, and then the ejecting unit 6 is inserted into the injection hole 24 to eject the injection molded part 13 in the mold cavity 23, and then the clamping and unloading unit 5 is used to remove the injection molded part 13 and unload it, thereby realizing the injection molding of multiple injection molded parts 13 in a single injection molding process, thereby improving the production efficiency of the injection molded parts 13.

[0051] The above are all preferred embodiments of the present invention, and are not intended to limit the scope of protection of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the scope of protection of the present invention.

Claims

1. A mold clamping device for producing seamless thin-walled injection molded parts, characterized by: The invention comprises a static mold (21) and a plurality of dynamic molds (22) arranged on a workbench (1), wherein each of the dynamic molds (22) is provided with a mold cavity (23) on a side facing the static mold (21), and the dynamic molds (22) and the static molds (21) are both provided with injection holes (24), the workbench (1) is provided with a guide rod (11), and the guide rod (11) is used to guide the sliding of the dynamic mold (22), and the workbench (1) is provided with a drive unit (3), and the drive unit (3) is used to drive the dynamic mold (22) and the static mold (21) to move relative to each other. The mold is opened and closed, and each movable mold (22) is provided with a cutting unit (4), and the cutting unit (4) is used to cut the injection molded part (13) in the injection hole (24). The workbench (1) is provided with a plurality of clamping and unloading units (5), and the clamping and unloading units (5) are used to clamp the injection molded part (13) and move it. The clamping and unloading units (5) correspond to the movable mold (22) one by one. The clamping and unloading units (5) are provided with a pushing unit (6), and the pushing unit (6) is used to push the injection molded part (13) out of the mold cavity (23).

2. The mold clamping device for producing seamless thin-walled injection molded parts according to claim 1, characterized in that: The driving unit (3) comprises a first motor (31), a bevel gear set (32) and a rotating rod (33); the bevel gear set (32), the rotating rod (33) and the movable mold (22) correspond one to one; the first motor (31) is arranged on the workbench (1); the output shaft end of the first motor (31) is coaxially provided with a driving shaft (34); the rotating rod (33) is rotatably arranged on the movable mold (22); the driving shaft (34) drives the rotating rod (33) to rotate through the bevel gear set (32); a first spur gear (37) is coaxially fixed on the rotating rod (33); a first rack (36) for meshing with the first spur gear (37) is provided on the workbench (1); the first spur gear (37) can drive the movable mold (22) to slide.

3. The mold clamping device for producing seamless thin-walled injection molded parts according to claim 2, characterized in that: The bevel gear set (32) includes a first bevel gear (321) and a second bevel gear (322) meshing with each other. The first bevel gear (321) is coaxially arranged on the drive shaft (34), and the second bevel gear (322) is coaxially fixedly arranged on the rotating rod (33). The drive shaft (34) is provided with a guide groove (341) along its axial direction. The first bevel gear (321) is provided with a guide block (323) for sliding in the guide groove (341).

4. The mold clamping device for producing seamless thin-walled injection molded parts according to claim 3, characterized in that: In two adjacent bevel gear sets (32), the transmission ratio of the bevel gear set (32) farther away from the static mold (21) is greater than the transmission ratio of the other bevel gear set (32).

5. The mold clamping device for producing seamless thin-walled injection molded parts according to claim 3, characterized in that: A connecting box (35) is slidingly sleeved on the driving shaft (34), the first bevel gear (321) and the second bevel gear (322) are both located in the connecting box (35), the rotating rod (33) passes through the connecting box (35) and is rotatably arranged, and the first bevel gear (321) is in contact with the inner wall of the connecting box (35).

6. The mold clamping device for producing seamless thin-walled injection molded parts according to claim 1, characterized in that: The cutting unit (4) comprises a cutter (41) and a cylinder (42), wherein the cylinder (42) is arranged on the movable mold (22), the cutter (41) is slidably arranged on the movable mold (22), the tip of the cutter (41) can penetrate into the injection hole (24), and the piston end of the cylinder (42) is connected to the cutter (41).

7. The mold clamping device for producing seamless thin-walled injection molded parts according to claim 1, characterized in that: The clamping and unloading unit (5) comprises a unloading rod (51) and a suction cup (52). A support rod (74) is provided on the workbench (1). A driving sleeve (75) is rotatably provided on the support rod (74). The driving sleeve (75) corresponds to the unloading rod (51) one by one. The unloading rod (51) is arranged on the driving sleeve (75). The driving sleeve (75) is used to drive the unloading rod (51) to move to the mold cavity (23). The suction cup (52) is arranged on the unloading rod (51) and is used to absorb the injection molded part (13) in the mold cavity (23). A vacuum generator (54) is provided on the workbench (1). The vacuum generator (54) is connected to each of the suction cups (52) through a connecting pipe (55).

8. The mold clamping device for producing seamless thin-walled injection molded parts according to claim 7, characterized in that: The ejection unit (6) includes an ejection rod (61), a support rod (62) and a driving member (63); a rotating sleeve (76) is rotatably provided on the support rod (74); the support rod (62) is arranged on the rotating sleeve (76); the ejection rod (61) is rotatably arranged on the support rod (62); the driving member (63) is arranged on the rotating sleeve (76); and the driving member (63) can drive the ejection rod (61) to be inserted into the injection hole (24).

9. The mold clamping device for producing seamless thin-walled injection molded parts according to claim 8, characterized in that: The driving member (63) includes a rotating motor (631), a driving sprocket (632), a driven sprocket (633) and a chain (634); the rotating motor (631) is arranged on the rotating sleeve (76); the driving sprocket (632) is rotatably arranged on the rotating sleeve (76); the driven chain (634) is coaxially slidably arranged on the support rod (62); the push rod (61) is threadedly connected to the driven chain (634); the support rod (62) can limit the axial sliding of the driven sprocket (633); the driving sprocket (632) and the driven sprocket (633) are connected by the chain (634); and the rotating motor (631) and the driving sprocket (632) are connected by a connecting member (64).

10. The mold clamping device for producing seamless thin-walled injection molded parts according to claim 9, characterized in that: The connecting member (64) includes a reciprocating screw (641), a second rack (642) and a second spur gear (643). The reciprocating screw (641) is coaxially arranged on the output shaft of the rotating motor (631). The second rack (642) is arranged on the reciprocating screw (641) and is threadedly connected. The second spur gear (643) is rotatably arranged on the rotating sleeve (76) and is used to drive the active sprocket (632) to rotate. The second spur gear (643) is engaged with the second rack (642). A driving screw (65) is coaxially fixed on the reciprocating screw (641), and the driving screw (65) is threadedly connected to the driving sleeve (75).

Images