Feeding device and injection molding equipment using the same

Abstract

The present application relates to the field of injection molding machines, a material unloading device and an injection molding device used therein. The material unloading device includes a bracket, a displacement mechanism, a rotation mechanism, a suction cup, a shearing mechanism and a locking mechanism. The displacement mechanism is used to drive the rotation mechanism to move relative to the bracket space. The rotation mechanism is used to drive the suction cup to rotate. The rotation axis of the suction cup is horizontal. The suction cup is used to suck the workpiece. The shearing mechanism is used to shear off the waste on the workpiece. When the shearing mechanism is working, the locking mechanism is used to lock the suction cup. After the mold is opened, the displacement mechanism drives the suction cup to extend between the movable mold and the fixed mold, and the suction cup sucks the workpiece; the displacement mechanism drives the suction cup to carry the workpiece out of the mold and move to the shearing mechanism; the shearing mechanism works to shear off the waste (sprue material) on the workpiece; the displacement mechanism drives the suction cup to move to the unloading station, the rotation mechanism is actuated, the suction cup rotates to the horizontal, and the workpiece is released; the rotation mechanism is actuated again, and the suction cup rotates to the vertical to prepare for removing the next workpiece.

Description

Technical Field

[0001] The present application relates to the field of injection molding machines, and in particular to a material discharge device and injection molding equipment using the same. Background Art

[0002] Injection molding machines are common equipment in the plastics processing industry, used to make plastic products of various shapes from thermoplastics or thermosetting plastics using plastic molding molds.

[0003] The working process of the injection molding machine includes the steps of quantitative feeding, melt plasticization, pressure injection, mold filling and cooling, and mold opening and part removal.

[0004] Melt plasticization: Plastic particles are converted into a molten state through heating and the shearing action of the screw.

[0005] Pressure injection: The molten plastic is injected into a closed mold at high speed through the thrust of the screw.

[0006] Mold filling and cooling: Solidify the plastic in the mold to form the desired shape.

[0007] Open the mold and take out the molded plastic product.

[0008] In the future, injection molding machines will be more intelligent and automated, and will adopt more advanced control and material technologies to meet the production needs of more complex and sophisticated plastic products. Summary of the invention

[0009] In order to automatically remove parts after mold opening, the present application provides a material removal device and an injection molding equipment using the same.

[0010] In the first aspect, the present application provides a feeding device, which adopts the following technical solution:

[0011] A material unloading device comprises a bracket, a displacement mechanism, a rotation mechanism, a suction cup, a shearing mechanism and a locking mechanism.

[0012] The displacement mechanism is used to drive the rotating mechanism to move relative to the support space.

[0013] The rotating mechanism is used to drive the suction cup to rotate, and the rotation axis of the suction cup is horizontal.

[0014] The suction cup is used to suck the workpiece.

[0015] The shearing mechanism is used to shear off waste materials on the workpiece.

[0016] When the shearing mechanism is working, the locking mechanism is used to lock the suction cup.

[0017] By adopting the above technical solution, after the mold is opened, the displacement mechanism drives the suction cup to extend between the movable mold and the fixed mold, and the suction cup absorbs the workpiece;

[0018] The displacement mechanism drives the suction cup to carry the workpiece out of the mold and move it to the shearing mechanism;

[0019] The shearing mechanism works to shear off the waste material (gate material) on the workpiece;

[0020] The displacement mechanism drives the suction cup to move to the unloading station, the rotating mechanism is activated, the suction cup rotates to a horizontal position, and the workpiece is released; the rotating mechanism is activated again, and the suction cup rotates to a vertical position to prepare for removing the next workpiece.

[0021] At the same time, during the process of shearing off the waste, the locking mechanism locks the suction cup to prevent the suction cup from rotating due to the force of the shearing mechanism on the workpiece, thereby ensuring accurate shearing off of the waste.

[0022] Preferably, the rotating mechanism comprises a base, a rotating plate, a transmission assembly, a rotating shaft and a driving block.

[0023] The displacement mechanism is used to drive the base to move relative to the support space.

[0024] The rotating plate is rotatably connected to the base, the rotating axis of the rotating plate is horizontal, and the suction cup is connected to the rotating plate.

[0025] The transmission assembly is used to receive the power of the rotating shaft and drive the rotating plate to reciprocate.

[0026] The shaft is provided with a groove, and a side wall of the groove along the circumference of the shaft is a force-bearing surface.

[0027] The driving block is used to drive the rotating shaft to rotate in one direction, and the driving block is slidably embedded in the groove.

[0028] When the driving block applies force to the force-bearing surface, the locking mechanism does not lock the suction cup.

[0029] When there is no interaction force between the driving block and the force-bearing surface, the locking mechanism locks the suction cup.

[0030] By adopting the above technical solution, the rotation direction of the driving block is constant (rotation direction A);

[0031] When the rotating mechanism is in normal working state, the driving block applies force to the force-bearing surface, causing the rotating shaft to rotate along the rotation direction A;

[0032] After the rotating mechanism stops working, the inertia of the rotating plate, rotating shaft and other components causes the rotating shaft to continue to rotate a small angle along the rotation direction A, and then the force-bearing surface separates from the driving block, and the locking mechanism locks the suction cup;

[0033] During the process of shearing off the waste, the locking mechanism locks the suction cup.

[0034] Preferably, the transmission assembly includes a transmission wheel, a transmission part, a transmission bar, a driving bar and a driving wheel.

[0035] The transmission wheel is connected to the rotating shaft.

[0036] The transmission part is connected to the outer periphery of the transmission wheel.

[0037] There are two transmission bars, which are located on both sides of the transmission wheel and are fixed between the two transmission bars.

[0038] The transmission part is used to cooperate with any transmission bar.

[0039] The driving bar is connected to the transmission bar, and the driving bar contacts the outer periphery of the driving wheel.

[0040] The rotating plate is connected to the driving wheel.

[0041] By adopting the above technical solution, the rotation direction of the rotating shaft and the transmission wheel is rotation direction A.

[0042] When the transmission part on the outer periphery of the transmission wheel and one transmission bar are in contact, one transmission bar drives the other transmission bar and the driving bar to move along direction A;

[0043] The transmission wheel rotates until the transmission part on the outer periphery of the transmission wheel contacts the other transmission bar, and the other transmission bar drives the other transmission bar and the driving bar to move in direction B, which is opposite to direction A.

[0044] The transmission assembly receives the power of the rotating shaft and drives the rotating plate to reciprocate.

[0045] Preferably, a pressure sensor is provided on the force-bearing surface.

[0046] By adopting the above technical solution, it is possible to detect whether the driving block applies a force to the force-bearing surface, so as to control the locking mechanism.

[0047] Preferably, the rotating mechanism further comprises a driving shaft.

[0048] The driving block is connected to the driving shaft, and a plurality of driving blocks are arranged at equal intervals along the circumference of the driving shaft.

[0049] The grooves and the driving blocks correspond to each other one by one.

[0050] By adopting the above technical solution, the shaft can be evenly stressed.

[0051] Preferably, the base is provided with a slide groove, and the rotating plate is provided with a locking groove.

[0052] The locking mechanism comprises a latch and a locking drive member,

[0053] One end of the latch is slidably embedded in the slide groove, and the other end of the latch is used to be embedded in the locking groove.

[0054] The locking drive member is used to drive the latch to slide.

[0055] By adopting the above technical solution, the suction cup is locked when one end of the latch is embedded in the slide groove and the other end of the latch is embedded in the locking groove.

[0056] Preferably, the other end of the latch is provided with a guide surface.

[0057] By adopting the above technical solution, it is convenient for the latch to be embedded in the locking groove.

[0058] Preferably, during the process of the latch pin being inserted into the locking groove, the guide surface drives the rotating plate to rotate, so that the rotating shaft rotates until the force-bearing surface is separated from the driving block.

[0059] By adopting the above technical solution, the latch is embedded in the locking groove to ensure that the force-bearing surface is disengaged from the drive.

[0060] Preferably, the latch is magnetic.

[0061] The locking drive comprises an electromagnet.

[0062] By adopting the above technical solution, the bolt can be driven to move quickly; the moving speed of the bolt can be controlled by controlling the current; there is no physical connection between the locking drive member and the bolt, which is conducive to maintaining the stability of the locking drive member.

[0063] In a second aspect, the present application provides an injection molding device, which adopts the following technical solution:

[0064] An injection molding device uses the above-mentioned material discharge device.

[0065] By adopting the above technical solution, automatic part removal can be achieved after mold opening.

[0066] In summary, the present application includes at least one of the following beneficial technical effects:

[0067] After the mold is opened, the displacement mechanism drives the suction cup to extend between the movable mold and the fixed mold, and the suction cup absorbs the workpiece;

[0068] The displacement mechanism drives the suction cup to carry the workpiece out of the mold and move it to the shearing mechanism;

[0069] The shearing mechanism works to shear off the waste material (gate material) on the workpiece;

[0070] The displacement mechanism drives the suction cup to move to the unloading station, the rotating mechanism is activated, the suction cup rotates to the horizontal position, and the workpiece is released; the rotating mechanism is activated again, and the suction cup rotates to the vertical position, preparing for removing the next workpiece;

[0071] During the process of shearing off the waste, the locking mechanism locks the suction cup to prevent the suction cup from rotating due to the force of the shearing mechanism on the workpiece, ensuring accurate shearing off of the waste;

[0072] The rotation direction of the drive block is constant (rotation direction A);

[0073] When the rotating mechanism is in normal working state, the driving block applies force to the force-bearing surface, causing the rotating shaft to rotate along the rotation direction A;

[0074] After the rotating mechanism stops working, the inertia of the rotating plate, rotating shaft and other components causes the rotating shaft to continue to rotate a small angle along the rotation direction A, and then the force-bearing surface separates from the driving block, and the locking mechanism locks the suction cup;

[0075] In the process of shearing off the waste, the locking mechanism locks the suction cup;

[0076] When the latch is inserted into the locking groove, the guide surface drives the rotating plate to rotate, so that the rotating shaft rotates until the force-bearing surface is separated from the driving block;

[0077] There is no physical connection between the locking drive and the latch, which helps the locking drive to remain stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0078] Figure 1 It is a structural schematic diagram of the unloading device.

[0079] Figure 2 is a schematic diagram of the rotating mechanism.

[0080] Figure 3 yes Figure 2 Enlarged view of point A in the middle.

[0081] Figure 4 is a schematic diagram of the transmission assembly, used to show the rotating shaft.

[0082] Figure 5 is a schematic diagram of the drive shaft.

[0083] Figure 6 is a schematic diagram of the locking mechanism.

[0084] Figure 7 It is a cross-sectional view of the locking mechanism.

[0085] Explanation of the reference numerals in the accompanying drawings: 1. bracket; 2. displacement mechanism; 3. rotation mechanism; 31. base; 311. slide groove; 32. turn plate; 33. transmission assembly; 331. transmission wheel; 332. transmission part; 333. transmission bar; 334. drive bar; 335. drive wheel; 34. rotating shaft; 341. groove; 342. force surface; 35. drive block; 36. drive shaft; 37. locking groove; 4. suction cup; 5. shearing mechanism; 6. locking mechanism; 61. latch; 62. locking drive member. DETAILED DESCRIPTION

[0086] The present application is further described in detail below in conjunction with the accompanying drawings.

[0087] Reference Figure 1 The embodiment of the present application discloses a material unloading device, including a bracket 1, a displacement mechanism 2, a rotation mechanism 3, a suction cup 4 and a shearing mechanism 5.

[0088] The displacement mechanism 2 is used to drive the rotation mechanism 3 to move in space relative to the bracket 1 .

[0089] In one embodiment: the displacement mechanism 2 includes an X-axis guide rail, an X-axis slide, an X-axis translation mechanism, a Y-axis guide rail, a Y-axis slide, a Y-axis translation mechanism, a Z-axis guide rail, a Z-axis slide and a Z-axis translation mechanism;

[0090] The X-axis is horizontal, and the X-axis guide rail is connected to the bracket 1; the X-axis slide is slidably connected to the X-axis guide rail; the X-axis translation mechanism is used to drive the X-axis slide to move;

[0091] The Y-axis is horizontal and perpendicular to the X-axis. The Y-axis guide rail is connected to the X-axis slide. The Y-axis slide is slidably connected to the Y-axis guide rail. The Y-axis translation mechanism is used to drive the Y-axis slide to move.

[0092] The Z-axis is vertical, and the Z-axis guide rail is connected to the Y-axis slide; the Z-axis slide is slidably connected to the Z-axis guide rail; the Z-axis translation mechanism is used to drive the Z-axis slide to move;

[0093] The X-axis translation mechanism, the Y-axis translation mechanism and the Z-axis translation mechanism can all adopt a lead screw pair structure, and use a motor to drive the lead screw of the lead screw pair structure to rotate;

[0094] The rotating mechanism 3 is connected to the Z-axis slide. The rotating mechanism 3 is used to drive the suction cup 4 to rotate, and the rotation axis of the suction cup 4 is horizontal.

[0095] Reference Figure 2 Specifically, the rotating mechanism 3 includes a base 31 , a rotating plate 32 , a transmission assembly 33 , a rotating shaft 34 , a driving block 35 and a driving shaft 36 .

[0096] The base 31 is fixedly connected to the Z-axis slide, so that the displacement mechanism 2 is used to drive the base 31 to move in space relative to the bracket 1.

[0097] The rotating plate 32 is rotatably connected to the base 31, and the rotating axis of the rotating plate 32 is horizontal. The rotating plate 32 can be a plate body or a frame structure.

[0098] The suction cup 4 is connected to the rotating plate 32, and a plurality of suction cups 4 are provided, and the plurality of suction cups 4 are evenly distributed at the rotating plate 32. All suction cups 4 are used to suck the workpiece (the suction cup 4 is attached to the surface of the workpiece).

[0099] The transmission assembly 33 is used to receive power from the rotating shaft 34 and drive the rotating plate 32 to reciprocate.

[0100] Reference Figure 3 Specifically, the transmission assembly 33 includes a transmission wheel 331 , a transmission part 332 , a transmission bar 333 , a driving bar 334 and a driving wheel 335 .

[0101] The transmission wheel 331 is coaxially fixedly connected to the rotating shaft 34 ; the transmission part 332 is connected to the outer periphery of the transmission wheel 331 , and the central angle of the transmission part 332 is less than 180°.

[0102] Two transmission bars 333 are provided. The two transmission bars 333 are located on both sides of the transmission wheel 331 , and the two transmission bars 333 are fixedly connected.

[0103] The transmission part 332 is used to cooperate with any transmission bar 333. In one embodiment, the transmission part 332 is a transmission tooth, the transmission bar 333 is a rack, and the transmission part 332 and the transmission bar 333 are meshed to achieve transmission. In another embodiment, the transmission part 332 is rubber, and the transmission part 332 and the transmission bar 333 are frictionally transmitted.

[0104] The driving bar 334 is fixedly connected to the transmission bar 333, and the driving bar 334 contacts the outer periphery of the driving wheel 335. Similarly, in one embodiment, a gear rack structure is provided between the driving bar 334 and the driving wheel 335, and transmission is achieved by meshing. In another embodiment, transmission is achieved between the driving bar 334 and the driving wheel 335 by friction.

[0105] The rotating plate 32 is fixedly connected to the driving wheel 335. The driving wheel 335 is rotatably connected to the base 31 around its own axis.

[0106] Reference Figure 4 and Figure 5 The rotating shaft 34 is provided with a groove 341 , and the groove 341 extends along the circumference of the rotating shaft 34 , and a side wall of one end of the groove 341 along the circumference of the rotating shaft 34 is a force-bearing surface 342 .

[0107] The driving block 35 is used to drive the rotating shaft 34 to rotate in one direction, and the driving block 35 is slidably embedded in the groove 341 .

[0108] Specifically: the driving block 35 is connected to the driving shaft 36, and a plurality of driving blocks 35 are arranged at equal intervals along the circumference of the driving shaft 36; the grooves 341 and the driving blocks 35 correspond to each other one by one;

[0109] The groove 341 may be provided at the end surface of the rotating shaft 34 or at the outer peripheral surface of the rotating shaft 34; in the accompanying drawings, the groove 341 is fan-shaped;

[0110] The drive shaft 36 may be driven to rotate by a motor, preferably a servo motor.

[0111] When the driving block 35 applies a force to the force-bearing surface 342 , the locking mechanism 6 does not lock the suction cup 4 ;

[0112] When there is no interaction force between the driving block 35 and the force-bearing surface 342 , the locking mechanism 6 locks the suction cup 4 .

[0113] A pressure sensor is provided at the force-bearing surface 342 to detect the acting force between the driving block 35 and the force-bearing surface 342 .

[0114] The shearing mechanism 5 is connected to the bracket 1 and is used for shearing off waste materials on the workpiece.

[0115] The shearing mechanism 5 comprises a connecting rod and a cutting knife.

[0116] One end of the connecting rod is movably connected to the bracket 1, and two connecting rods are provided. The other end of the connecting rod can be used to contact the surface of the workpiece; there are two cutters, both of which are located between the two connecting rods, and the two cutters are respectively connected to the opposite surfaces of the two connecting rods.

[0117] The two connecting rods can be driven by a cylinder to move closer to each other so as to cut off the waste by two cutters.

[0118] Reference Figure 6 and Figure 7 The unloading device further comprises a locking mechanism 6. When the shearing mechanism 5 is working, the locking mechanism 6 is used to lock the suction cup 4 and the rotating plate 32.

[0119] The base 31 is provided with a slide groove 311. The rotating plate 32 or the driving wheel 335 is provided with a locking groove 37.

[0120] The locking mechanism 6 includes a latch 61 and a locking driver 62. One end of the latch 61 is slidably embedded in the slide groove 311, and the other end of the latch 61 is provided with a guide surface, and the other end of the latch 61 is used to be embedded in the locking groove 37. The locking driver 62 is used to drive the latch 61 to slide.

[0121] In this embodiment: the latch 61 is magnetic; the locking drive member 62 includes an electromagnet.

[0122] Preferably, the latch pin 61 moves vertically, and the guide surface is located at the lower end of the latch pin 61 .

[0123] When the latch pin 61 is inserted into the locking groove 37 , the guide surface drives the rotating plate 32 to rotate, so that the rotating shaft 34 rotates until the force-bearing surface 342 is separated from the driving block 35 .

[0124] The implementation principle of a material unloading device in the embodiment of the present application is as follows: after the mold is opened, the displacement mechanism 2 drives the suction cup 4 to extend between the movable mold and the fixed mold, and the suction cup 4 sucks the workpiece;

[0125] The displacement mechanism 2 drives the suction cup 4 to carry the workpiece out of the mold and move to the shearing mechanism 5;

[0126] The shearing mechanism 5 works to shear off waste material (gate material) on the workpiece;

[0127] The displacement mechanism 2 drives the suction cup 4 to move to the unloading station, the rotating mechanism 3 is activated, the suction cup 4 rotates to the horizontal position, and the workpiece is released; the rotating mechanism 3 is activated again, and the suction cup 4 rotates to the vertical position to prepare for removing the next workpiece.

[0128] The process of the suction cup 4 rotating to the vertical position is as follows: the motor drives the driving shaft 36 and the driving block 35 to rotate, the driving block 35 applies a force to the force-bearing surface 342 to drive the rotating shaft 34 and the transmission wheel 331 to rotate, and the driving wheel 335, the rotating plate 32 and the suction cup 4 are driven to rotate through a transmission bar 333 and a driving bar 334;

[0129] When the rotation is nearly vertical (the guide surface of the latch 61 can extend into the locking groove 37), the motor stops working, and the inertia of the rotating plate 32 and other components causes the rotating shaft 34 to continue to rotate, the force-bearing surface 342 is separated from the driving block 35, and the pressure sensor outputs a signal, and the locking driving member 62 works, so that the latch 61 is inserted into the locking groove 37;

[0130] When the latch 61 is inserted into the locking groove 37 , the guide surface drives the rotating plate 32 to rotate until the locking groove 37 faces the sliding groove 311 , so that the rotating shaft 34 continues to rotate to vertical, ensuring that the force-bearing surface 342 is separated from the driving block 35 .

[0131] The embodiment of the present application also discloses an injection molding device, including an injection mold and the above-mentioned material discharge device.

[0132] The injection mold is used to shape the workpiece. The unloading device is used to remove the workpiece from the mold.

[0133] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A feeding device, characterized in that: It comprises a bracket (1), a displacement mechanism (2), a rotation mechanism (3), a suction cup (4), a shearing mechanism (5) and a locking mechanism (6). The displacement mechanism (2) is used to drive the rotation mechanism (3) to move in space relative to the bracket (1). The rotating mechanism (3) is used to drive the suction cup (4) to rotate, and the rotation axis of the suction cup (4) is horizontal. The suction cup (4) is used to suck the workpiece. The shearing mechanism (5) is used to shear off waste material on the workpiece. When the shearing mechanism (5) is in operation, the locking mechanism (6) is used to lock the suction cup (4); The rotating mechanism (3) comprises a base (31), a rotating plate (32), a transmission assembly (33), a rotating shaft (34) and a driving block (35). The displacement mechanism (2) is used to drive the base (31) to move in space relative to the bracket (1). The rotating plate (32) is rotatably connected to the base (31), the rotating axis of the rotating plate (32) is horizontal, and the suction cup (4) is connected to the rotating plate (32). The transmission assembly (33) is used to receive power from the rotating shaft (34) and drive the rotating plate (32) to reciprocate. The rotating shaft (34) is provided with a groove (341), and a side wall of the groove (341) along the circumference of the rotating shaft (34) is a force-bearing surface (342). The driving block (35) is used to drive the rotating shaft (34) to rotate in one direction. The driving block (35) is slidably embedded in the groove (341). When the driving block (35) applies a force to the force-bearing surface (342), the locking mechanism (6) does not lock the suction cup (4). When there is no interaction force between the driving block (35) and the force-bearing surface (342), the locking mechanism (6) locks the suction cup (4).

2. The feeding device according to claim 1, characterized in that: The transmission assembly (33) comprises a transmission wheel (331), a transmission part (332), a transmission bar (333), a driving bar (334) and a driving wheel (335). The transmission wheel (331) is connected to the rotating shaft (34). The transmission part (332) is connected to the outer periphery of the transmission wheel (331). Two transmission bars (333) are provided, and the two transmission bars (333) are located on both sides of the transmission wheel (331). The two transmission bars (333) are fixed between each other. The transmission part (332) is used to cooperate with any transmission bar (333). The driving bar (334) is connected to the transmission bar (333), and the driving bar (334) contacts the outer periphery of the driving wheel (335). The rotating plate (32) is connected to the driving wheel (335).

3. The feeding device according to claim 1, characterized in that: A pressure sensor is provided on the force-bearing surface (342).

4. The feeding device according to claim 1, characterized in that: The rotating mechanism (3) further comprises a driving shaft (36). The driving block (35) is connected to the driving shaft (36), and a plurality of the driving blocks (35) are arranged at equal intervals along the circumference of the driving shaft (36). The grooves (341) and the driving blocks (35) correspond one to one.

5. The unloading device according to claim 1 or 2, characterized in that: The base (31) is provided with a slide groove (311), and the rotating plate (32) is provided with a locking groove (37). The locking mechanism (6) comprises a latch (61) and a locking drive member (62). One end of the latch pin (61) is slidably embedded in the slide groove (311), and the other end of the latch pin (61) is used to be embedded in the locking groove (37). The locking drive member (62) is used to drive the latch pin (61) to slide.

6. The unloading device according to claim 5, characterized in that: The other end of the latch (61) is provided with a guide surface.

7. The feeding device according to claim 6, characterized in that: During the process of the latch (61) being inserted into the locking groove (37), the guide surface drives the rotating plate (32) to rotate, so that the rotating shaft (34) rotates until the force-bearing surface (342) is separated from the driving block (35).

8. The material discharging device according to claim 5, characterized in that: The latch (61) has magnetic properties. The locking drive component (62) comprises an electromagnet.

9. An injection molding device, characterized in that: The material discharge device according to any one of claims 1 to 8 is used.

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