A bottle preform injection molding apparatus

Abstract

The utility model relates to the technical field of plastic bottle or jar production, especially a bottle blank injection molding device. Bottle blank injection molding device includes: injection molding system, die system, electrical control module and blanking device, the blanking device includes: X slide rail, Y slide rail, Z slide rail, sliding drive mechanism, sliding plate and grabbing hand Bottle blank injection molding device adds the blanking device on the structure of the existing injection molding machine, the blanking device can drive the grabbing hand moves in X, Y, Z direction, has stable flexible movement structure, the grabbing hand can according to the die opening direction of die system, utilizes the die opening space, and the injection molding piece is taken out horizontally, and then is vertically lifted, finally moves to the outside of injection molding machine, supplies subsequent cutting processing. Bottle blank injection molding device does not need manual participation in the whole process from injection molding to blanking, can realize the efficient and accurate blanking operation of injection molding piece, greatly improves the injection molding efficiency and quality of bottle blank.

Description

Technical Field

[0001] This utility model relates to the field of plastic bottle or can production technology, and in particular to a bottle preform injection molding device. Background Technology

[0002] Plastic bottles or cans are used in food, fruit, and cosmetic packaging. These bottles or cans are made of plastic materials. Specifically, they are first injection molded into preforms of a set specification using an injection molding machine, and then blow molded into plastic bottles or cans of a specified shape and size using a blow molding die.

[0003] In traditional technology, after a single preform is injection molded using an injection molding machine, it needs to be manually removed. With technological advancements, there is a need to improve the injection molding efficiency of preforms; therefore, current technologies have introduced methods to mold multiple preforms at a time, such as... Figure 1 As shown, in an injection molding process, multiple preforms are injection molded in one operation. After being removed from the mold, the preforms still have gating connections and gating rods between them. The ends of the gating rods also retain a certain length of tapered section, the shape of which is not entirely controllable. Then, a worker wearing gloves, after the injection molding machine's mold clamping system opens, grasps the gating rod to remove the preform, which is then further cut to obtain multiple independent preforms. In this preform injection molding process, manual removal of the injection molded part from the mold is still required, followed by moving the preform to the subsequent cutting device. Manual removal of the injection molded part is inefficient, and the manual handling and movement can easily cause bumps or other damage to the part. Furthermore, the injection molding quality of the preform directly affects the quality of the subsequently blow-molded plastic bottles or cans. Utility Model Content

[0004] In order to solve the technical problem of low efficiency in preform injection molding in the prior art, this utility model provides a preform injection molding device that can realize efficient and precise feeding of injection molded parts.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows: A preform injection molding apparatus includes: an injection system, a mold closing system, and an electrical control module. The injection system is used to melt and extrude the injection molding material in the feeding device into the molding die. The mold closing system is used to perform mold opening and closing operations according to the injection molding requirements. The electrical control module is used to control the operation of the preform injection molding apparatus. It also includes a feeding device; the feeding device includes: an X slide rail, a Y slide rail, a Z slide rail, a sliding drive mechanism, a sliding plate, and a gripper; the X slide rail is fixedly installed on the frame of the preform injection molding device along the X direction; the Y slide rail is slidably installed above the X slide rail along the Y direction and can move along the X slide rail under the drive of the sliding drive mechanism; the sliding plate is slidably installed above the Y slide rail and can move along the Y slide rail under the drive of the sliding drive mechanism; the Z slide rail is fixed to the sliding plate along the Z direction; the gripper is slidably installed on one side of the Z slide rail, so that the gripper can move along the Z slide rail under the drive of the sliding drive mechanism; the drive mechanism and the gripper are electrically connected to the electrical control module; the gripper can, under the drive of the electrical control module and the sliding drive mechanism, remove the injection molded part from the injection mold of the mold clamping system and move it to the outside of the preform injection molding device.

[0006] Preferably, the gripper includes: an extension arm, a flipping drive device, a flipping seat, a rotary drive device, and a clamping module; the flipping drive device and the rotary drive device are electrically connected to the electrical control module; the extension arm is vertically arranged, and its upper end is slidably mounted to one side of the Z-slide rail; the lower end of the extension arm is hinged to the junction end of the flipping seat via a first horizontal pivot; the rotary drive device is fixedly mounted on the rotating end of the flipping seat; the driving end of the rotary drive device is provided with a clamping module; the flipping drive device is mounted on the extension arm, and the telescopic drive end of the flipping drive device is hinged to the flipping seat via a second horizontal pivot, so that the flipping seat can flip around the first horizontal pivot under the drive of the flipping drive device.

[0007] Preferably, the clamping module includes: a connecting base plate, mounting blocks, telescopic cylinders, and clamps; the connecting base plate is perpendicularly fixed to the driving end of the rotating drive device; one end of each of the two mounting blocks is fixed to one side of the connecting base plate, and the two mounting blocks are arranged parallel to each other; the two telescopic cylinders are respectively fixedly installed on the other end of the mounting blocks; each of the telescopic driving ends of the two telescopic cylinders is provided with a clamp, and the two clamps are arranged facing each other, so that the two clamps can be brought together or moved away from each other under the drive of the telescopic cylinders.

[0008] Preferably, the clamp is a rectangular block with a clamping groove along the axial direction of the rotary drive device. The shape of the clamping groove is adapted to the outer wall shape of the casting rod. The clamping groove is located on the mating surface of the two clamps. When the two clamps approach each other, the two clamping grooves can clamp the casting rod of the injection molded part from both sides.

[0009] Preferably, the clamping groove is a rectangular groove, and the bottom surface of the clamping groove is provided with a conical protrusion structure, the extension direction of the conical protrusion structure is consistent with the extension direction of the telescopic cylinder; the protrusion structure protrudes 0.5 to 1 mm from the bottom surface of the clamping groove.

[0010] Preferably, the thickness of the mounting block is 20-30mm. Preferably, the flipping drive device is a pneumatic telescopic device; the flipping base has travel contacts on both sides of the first horizontal rotating shaft; the lower end of the extension arm has a corresponding position with a first limit switch that contacts the travel contacts; the first limit switch is electrically connected to the electrical control module. The rotation drive device is a rotary motor, and a protruding plate is fixedly mounted on the rotating shaft of the rotary motor; a second limit switch is fixedly mounted on the housing of the rotary motor; the protruding plate can rotate to a set position and contact the second limit switch, and the second limit switch is electrically connected to the electrical control module.

[0011] Preferably, the sliding drive mechanism is a lead screw drive mechanism.

[0012] One of the above technical solutions has the following beneficial effects: The preform injection molding device adds a feeding device to the existing injection molding machine structure. This feeding device can drive the gripper to move in the X, Y, and Z directions, possessing a stable and flexible moving structure. The gripper, according to the mold opening direction of the mold closing system, utilizes the mold opening space to horizontally remove the injection-molded part, then vertically lifts it, and finally moves it to the outside of the injection molding machine for subsequent cutting processing. The preform injection molding device eliminates the need for manual intervention throughout the entire process from injection molding to feeding, enabling efficient and precise feeding of the injection-molded part, greatly improving the efficiency and quality of preform injection molding. Attached Figure Description

[0013] Figure 1 This is a three-dimensional structural diagram of an injection-molded part that needs to be cut in one embodiment of the present invention.

[0014] Figure 2 This is a three-dimensional structural diagram of the preform injection molding device described in one embodiment of the present invention.

[0015] Figure 3 for Figure 2 A three-dimensional structural schematic diagram of another perspective of the embodiment shown.

[0016] Figure 4 This is a three-dimensional structural diagram of the material gripper described in one embodiment of the present invention.

[0017] Figure 5 for Figure 4 A schematic diagram of the test structure of the embodiment shown.

[0018] Figure 6 for Figure 4 A three-dimensional structural schematic diagram of another perspective of the embodiment shown.

[0019] Figure 7 This is a schematic diagram of the clamping module clamping an injection-molded part in one embodiment of the present invention.

[0020] Figure 8 This is a schematic diagram of a portion of the clamping mold in one embodiment of the present invention.

[0021] In the attached diagram: injection molded part 10, preform 11, casting connection part 12, casting rod-shaped part 13, conical section 14, injection molding system 110, mold clamping system 120, feeding device 111, X slide rail 210, Y slide rail 220, Z slide rail 230, sliding plate 240, gripper 250, extension arm 251, flipping drive device 252, flipping seat 253, rotation drive device 254, clamping module 255, first horizontal rotating shaft 256, second horizontal rotating shaft 257, connecting base plate 261, mounting block 262, telescopic cylinder 263, chuck 264, clamping groove 265, conical protrusion structure 266, stroke contact 267, first limit switch 268, protrusion plate part 269, second limit switch 270. Detailed Implementation

[0022] like Figure 2 and Figure 3As shown, an embodiment of this application discloses a bottle preform injection molding apparatus, comprising: an injection molding system 110, a mold clamping system 120, and an electrical control module. The injection molding system 110 is used to melt and extrude the injection molding material in the feeding device 111 into the molding die. The injection molding system 110, the mold clamping system 120, and the electrical control module are all conventional structures of existing injection molding machines, and will not be described in detail here. The core inventive point of this application is that, based on the structure of the injection molded part 10, a feeding device is added to the structure of the existing injection molding machine for automatically feeding the injection molded part 10. The mold closing system 120 is used to realize the mold opening and closing operations according to the injection molding requirements; the electrical control module is used to control the operation of the preform injection molding device; it also includes a material unloading device; the material unloading device includes: an X slide rail 210, a Y slide rail 220, a Z slide rail 230, a sliding drive mechanism, a sliding plate 240, and a material gripper 250; the X slide rail 210 is fixedly installed on the frame of the preform injection molding device along the X direction; the Y slide rail 220 is slidably installed above the X slide rail 210 along the Y direction; and can move along the X slide rail 210 under the drive of the sliding drive mechanism; the sliding plate 240 is slidably installed on the Y slide rail 220. Above 0; and can move along the Y slide rail 220 under the drive of the sliding drive mechanism; the Z slide rail 230 is fixed to the sliding plate 240 along the Z direction; the gripper 250 is slidably mounted on one side of the Z slide rail 230, so that the gripper 250 can move along the Z slide rail 230 under the drive of the sliding drive mechanism; the drive mechanism and the gripper 250 are electrically connected to the electrical control module; the gripper 250 can take out the injection molded part 10 in the injection mold of the mold clamping system 120 and move it to the outside of the preform injection molding device under the drive of the electrical control module and the sliding drive mechanism.

[0023] The preform injection molding device adds a feeding device to the existing injection molding machine structure. This feeding device can drive the gripper 250 to move in the X, Y, and Z directions, possessing a stable and flexible moving structure. The gripper 250, according to the mold opening direction of the mold closing system 120, utilizes the mold opening space to horizontally remove the injection molded part 10, then vertically lift it, and finally move it to the outside of the injection molding machine for subsequent cutting processing. The preform injection molding device eliminates the need for manual intervention throughout the entire process from injection molding to feeding, enabling efficient and precise feeding of the injection molded part 10, greatly improving the efficiency and quality of preform injection molding.

[0024] There are many different implementations of the material gripper 250. As long as it can take the injection molded part 10 out of the mold in the horizontal direction first, and then flip it down 90 degrees so that the injection molded part can be lifted vertically away from the mold closing system 120, it is acceptable.

[0025] like Figures 4 to 6As shown, the specific structure of the gripper 250 in this embodiment is as follows: the gripper 250 includes: an extension arm 251, a flipping drive device 252, a flipping base 253, a rotation drive device 254, and a clamping module 255; the flipping drive device 252 and the rotation drive device 254 are electrically connected to the electrical control module; the extension arm 251 is vertically arranged, and the upper end of the extension arm 251 is slidably mounted to one side of the Z-slide rail 230; the lower end of the extension arm 251 is connected to the first horizontal rotating shaft 25. 6 is hinged to the hinge end of the flipping seat 253; a rotary drive device 254 is fixedly installed on the rotating end of the flipping seat 253; a clamping module 255 is provided on the driving end of the rotary drive device 254; the flipping drive device 252 is installed on the extension arm 251, and the telescopic drive end of the flipping drive device 252 is hinged to the flipping seat 253 through the second horizontal rotating shaft 257, so that the flipping seat 253 can be flipped around the first horizontal rotating shaft 256 under the drive of the flipping drive device 252.

[0026] The clamping module 255 includes: a connecting base plate 261, mounting blocks 262, telescopic cylinders 263, and clamps 264; the connecting base plate 261 is perpendicularly fixed to the driving end of the rotating drive device 254; one end of each of the two mounting blocks 262 is fixed to one side of the connecting base plate 261, and the two mounting blocks 262 are arranged parallel to each other; the two telescopic cylinders 263 are respectively fixedly installed on the other end of the mounting blocks 262; each of the telescopic driving ends of the two telescopic cylinders 263 is provided with a clamp 264, and the two clamps 264 are arranged facing each other, so that the two clamps 264 can be brought together or moved away from each other under the drive of the telescopic cylinders 263.

[0027] The clamp 264 is a rectangular block, and a clamping groove 265 is provided along the axial direction of the rotary drive device 254. The shape of the clamping groove 265 is adapted to the outer wall shape of the casting rod. The clamping groove 265 is located on the mating surface of the two clamps 264. When the two clamps 264 approach each other, the two clamping grooves 265 can clamp the casting rod of the injection molded part 10 from both sides.

[0028] Preferably, such as Figure 6 As shown, the clamping groove 265 is a rectangular groove, and the bottom surface of the clamping groove 265 is provided with a conical protrusion structure 266. The extension direction of the conical protrusion structure 266 is consistent with the extension direction of the telescopic cylinder 263. The protrusion structure protrudes 0.5 to 1 mm from the bottom surface of the clamping groove 265.

[0029] Preferably, the thickness of the mounting block 262 is 20-30mm. Since the injection-molded part 10 is obtained through injection molding, in addition to the product's own structure, it also has a casting connection and a casting rod-shaped part. Furthermore, the end of the casting rod-shaped part retains a 20-30mm long tapered section. The thickness direction of the mounting block 262 is the same as the axial extension direction of the rotary drive device 254. This design allows the tapered section to extend into the hollow space between the mounting block 262 and the connecting base plate 261, ensuring that the injection-molded part 10 is in contact with the direction surface of the casting rod-shaped part when gripped by the chuck 264. This prevents the gripped injection-molded part from slipping or rotating with the chuck 264.

[0030] Preferably, the flipping drive device 252 is a pneumatic telescopic device; the flipping base 253 is provided with travel contacts 267 on both sides of the first horizontal rotating shaft 256; the lower end of the extension arm 251 is provided with a first limit switch 268 that contacts the travel contacts 267; the first limit switch 268 is electrically connected to the electrical control module. The rotation drive device 254 is a rotary motor, and a convex plate portion 269 is fixedly installed on the rotating shaft of the rotary motor; a second limit switch 270 is fixedly installed on the housing of the rotary motor; the convex plate portion 269 can rotate to a set position and contact the second limit switch 270, and the second limit switch 270 is electrically connected to the electrical control module. After the gripper 250 grasps the injection molded part 10, it can accurately rotate downwards by 90 degrees and then be vertically lifted away from the mold closing system 120. When the injection molded part 10 is moved out of the injection molding machine and needs to be placed in a designated position, the gripper 250 can accurately rotate within a 180-degree range according to the placement position requirements. The gripper 250 has more precise and higher flexibility, which can ensure that the injection molded part 10 is not damaged during the unloading process and also ensure the accuracy of unloading.

[0031] The sliding drive mechanism is a lead screw drive mechanism. The lead screw drive mechanism is a linear drive mechanism widely used in the art, which generally includes a lead screw, a drive motor, and a nut sleeve. For example, the lead screw is mounted inside the X-slide rail 210 along the X direction via a bearing. The nut sleeve is fitted onto the lead screw, and the outer wall of the nut sleeve is fixed to the Y-slide rail 220. The bottom surface of the Y-slide rail 220 has a sliding groove, which is slidably mounted with the X-slide rail 210. The sliding mounting structure of the sliding plate 240 and the Y-slide rail 220, and the sliding mounting structure of the gripper 250 and the Z-slide rail 230 are similar to the above and will not be described again here.

[0032] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0033] In the description of this utility model, it should be understood that the directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this utility model. The directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0034] For ease of description, spatial relative terms such as "above," "over," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "above" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0035] The technical principles of this utility model have been described above with reference to specific embodiments. These descriptions are merely for explaining the principles of this utility model and should not be construed as limiting the scope of protection of this utility model in any way. Based on this explanation, those skilled in the art can readily conceive of other specific embodiments of this utility model without any inventive effort, and these embodiments will all fall within the scope of protection of this utility model.

Claims

1. A preform injection molding apparatus, comprising: The system comprises an injection molding system, a mold clamping system, and an electrical control module. The injection molding system is used to melt and extrude the injection molding raw material in the feeding device into the molding die. The mold closing system is used to realize the mold opening and closing operations according to the needs of injection molding; The electrical control module is used to control the operation of the preform injection molding device; Its characteristic is that it further includes a feeding device; The feeding device includes: an X slide rail, a Y slide rail, a Z slide rail, a sliding drive mechanism, a sliding plate, and a gripper; The X slide rail is fixedly installed on the frame of the preform injection molding device along the X direction; The Y-rail is slidably mounted above the X-rail along the Y direction; and can move along the X-rail under the drive of the sliding drive mechanism. The sliding plate is slidably mounted above the Y-slide rail; and can move along the Y-slide rail under the drive of the sliding drive mechanism. The Z-slide rail is fixed to the sliding plate along the Z direction; The gripper is slidably mounted on one side of the Z-slide rail, so that the gripper can move along the Z-slide rail under the drive of the sliding drive mechanism. The drive mechanism and the gripper are electrically connected to the electrical control module; Driven by the electrical control module and the sliding drive mechanism, the material handler can remove the injection molded part from the injection mold of the mold closing system and move it to the outside of the preform injection molding device.

2. The preform injection molding apparatus according to claim 1, characterized in that, The gripper includes: an extension arm, a flipping drive device, a flipping base, a rotary drive device, and a clamping module; The flipping drive device and the rotating drive device are electrically connected to the electrical control module; The extension arm is vertically arranged, and its upper end is slidably mounted to one side of the Z-slide rail. The lower end of the extension arm is hinged to the junction of the flipping seat via a first horizontal pivot. A rotation drive device is fixedly mounted on the rotating end of the flipping seat. The drive end of the rotation drive device is provided with a clamping module. The flipping drive device is mounted on the extension arm, and its telescopic drive end is hinged to the flipping seat via a second horizontal pivot, so that the flipping seat can rotate around the first horizontal pivot under the drive of the flipping drive device.

3. The preform injection molding apparatus according to claim 2, characterized in that, The clamping module includes: a connecting base plate, mounting blocks, telescopic cylinders, and clamps; the connecting base plate is perpendicularly fixed to the driving end of the rotating drive device; one end of each of the two mounting blocks is fixed to one side of the connecting base plate, and the two mounting blocks are arranged parallel and facing each other; the two telescopic cylinders are respectively fixedly installed on the other end of the mounting blocks; each of the telescopic driving ends of the two telescopic cylinders is provided with a clamp, and the two clamps are arranged facing each other, so that the two clamps can be brought together or moved away from each other under the drive of the telescopic cylinders.

4. The preform injection molding apparatus according to claim 3, characterized in that, The clamp is a rectangular block with a clamping groove along the axis of the rotary drive device. The shape of the clamping groove is adapted to the outer wall shape of the casting rod. The clamping groove is located on the mating surface of the two clamps. When the two clamps approach each other, the two clamping grooves can clamp the casting rod of the injection molded part from both sides.

5. The preform injection molding apparatus according to claim 4, characterized in that, The clamping groove is a rectangular groove, and the bottom surface of the clamping groove is provided with a conical protrusion structure. The extension direction of the conical protrusion structure is consistent with the extension direction of the telescopic cylinder. The protrusion structure protrudes 0.5 to 1 mm from the bottom surface of the clamping groove.

6. The preform injection molding apparatus according to claim 3, characterized in that, The thickness of the mounting block is 20-30 mm.

7. The preform injection molding apparatus according to claim 2, characterized in that, The flipping drive device is a pneumatic telescopic device; the flipping base is provided with stroke contacts on both sides of the first horizontal rotating shaft; the lower end of the extension arm is provided with a first limit switch that contacts the stroke contacts; the first limit switch is electrically connected to the electrical control module.

8. The preform injection molding apparatus according to claim 2, characterized in that, The rotary drive device is a rotary motor, and a protruding plate is fixedly mounted on the rotating shaft of the rotary motor; a second limit switch is fixedly mounted on the housing of the rotary motor; the protruding plate can rotate to a set position and contact the second limit switch, and the second limit switch is electrically connected to the electrical control module.

9. The preform injection molding apparatus according to claim 8, characterized in that, The sliding drive mechanism is a lead screw drive mechanism.

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