Material pipe forming machine head lifting driving device

Abstract

The utility model relates to a material pipe forming machine head lifting driving device which is arranged at one end, close to a material pipe forming machine head, below a heating feeding mechanism. Comprising a driving cylinder, a sliding table, a driving cylinder support, a lifting driving assembly and two roller sets. The driving cylinder is fixed on the driving cylinder bracket; the driving cylinder bracket is fixedly arranged at the rear part of the sliding table; the lower end of the sliding table is fixedly connected with a rack of blow molding production equipment; the lifting driving assembly is composed of two lifting driving plates and a connecting plate fixedly connected to the rear ends of the two driving plates, and the connecting plate is perpendicularly and fixedly connected with the cylinder rod end. The lower ends of the two lifting driving plates are connected with the upper end of the sliding table through linear guide rail pairs; the upper end of the lifting driving plate is provided with a lifting inclined surface which is inclined upwards from front to back; the two roller sets are composed of roller supports and rollers rotationally installed at the lower ends of the roller supports through wheel shafts. The two roller groups are fixed below the bottom plate of the heating and feeding mechanism through roller brackets; and the two rollers are in contact with the lifting inclined surfaces on the two lifting driving plates. The device can improve the stability of pitching motion and improve the motion speed.

Description

Technical Field

[0001] This utility model belongs to the technical field of blow molding production equipment, specifically relating to a lifting drive device for a tube forming die head. Background Technology

[0002] Blow molding is an important processing method for thermoplastics, used to process films and hollow products such as bottles and barrels. Current blow molding production equipment mainly includes a feeding mechanism, a heating and feeding mechanism, a tube forming die head, a tube cutting mechanism, a product film forming mechanism, a material edge removal mechanism, and a conveying mechanism between these mechanisms. The tube forming die head forms the molten plastic raw material into a tube and outputs it downwards under weight. The tube enters the space between the film-forming cavities of the open product film-forming mechanism. After the film-forming cavities close, the tube cutting mechanism cuts off the portion of the tube located at the upper end of the film-forming cavity. The tube cutting mechanism is located below the tube forming die head.

[0003] During blow molding production, to prevent the tube from sticking at the cut point, the upper end of the tube located in the film-forming cavity after cutting can be smoothly flipped. The tube forming head needs to perform frequent up-and-down reciprocating movements. That is, when the tube descends into the corresponding position of the film-forming cavity, the tube forming head descends. After the film is formed and the tube is cut by the tube cutting mechanism, the tube forming head immediately moves upward. When the film-forming mechanism of the next station rotates or moves to directly below the tube forming head, the tube forming head will then descend again.

[0004] The existing tube forming head is installed at the end of a spiral heating and feeding auger. By setting a hinge point connected to the frame at the end of the spiral heating and feeding auger away from the tube forming head, and setting a drive cylinder below the spiral heating and feeding auger near the tube forming head, the pitch drive of the spiral heating and feeding auger is realized, thereby driving the tube forming head to move up and down reciprocatingly.

[0005] The existing tube forming die head lifting drive device needs further improvement in terms of the smoothness and speed of the pitching motion to meet the production requirements of high-speed rotary multi-mold blow molding. Utility Model Content

[0006] This invention addresses the shortcomings of existing technologies by proposing a lifting drive device for the tube forming die head, which can improve the stability of pitching motion and increase the speed of motion.

[0007] The above-mentioned objective of this utility model is achieved through the following technical solution:

[0008] A lifting drive device for a tube forming die head is provided, the lifting drive device being integrally disposed below the heating and feeding mechanism near the tube forming die head; it includes a drive cylinder, a slide table, a drive cylinder bracket, a lifting drive assembly, and two roller sets; the drive cylinder is fixed on the drive cylinder bracket, the drive cylinder bracket being fixedly installed at the rear of the slide table; the lower end of the slide table is fixedly connected to the frame of the blow molding production equipment; the lifting drive assembly consists of two parallel lifting drive plates and a connecting plate fixedly connected to the rear end of the two drive plates, the connecting plate being perpendicularly fixedly connected to the cylinder rod end of the drive cylinder; the lower ends of the two lifting drive plates are connected to the upper end of the slide table via linear guide rails arranged in the front-to-back direction; the upper end of the lifting drive plate is provided with a lifting ramp that slopes upward from front to back; the two roller sets consist of roller brackets and rollers rotatably mounted on the lower end of the roller brackets via axles; the two roller sets are fixed below the base plate of the heating and feeding mechanism via roller brackets, and the two rollers are in contact with the lifting ramps on the two lifting drive plates.

[0009] Furthermore, a downward-extending detection plate is fixed on the outer side of the lifting drive plate on one side. Two switch brackets are installed at the lower end of the slide table near the detection plate. The switch brackets are L-shaped and have mounting holes on their upright plates. A proximity switch is fixed in each of the mounting holes of the two switch brackets. The proximity switch near the front end is a raised-to-position detection switch, and the proximity switch at the rear end is a lowered-to-position detection switch.

[0010] Furthermore, the mounting holes on the switch bracket are elongated slots running in the front-to-back direction; the proximity switch is inserted into the elongated slot and locked in place with a nut.

[0011] The advantages and positive effects of this utility model are as follows:

[0012] 1. This lifting drive device uses a horizontally set drive cylinder as the power component. Through the cooperation of the inclined plane and the roller, the tube forming head can be lifted up. In addition, the tube forming head is tilted down by gravity. Compared with the existing method of direct drive by drive cylinder, this can greatly improve the stability and speed of the head's pitching motion.

[0013] 2. This lifting drive device, through the cooperation of two proximity switches and a detection plate, can achieve accurate control of lifting and lowering to the correct position. Attached Figure Description

[0014] Figure 1 This is a reference diagram showing the utility model in a downward-facing state when the tube forming die head is in use;

[0015] Figure 2 This is a reference diagram showing the material tube forming mechanism in an overhead position.

[0016] Figure 3This is a three-dimensional structural diagram of the lifting drive device for the tube forming die head of this utility model. Detailed Implementation

[0017] The structure of this utility model will be further described below with reference to the accompanying drawings and embodiments. It should be noted that these embodiments are descriptive and not limiting.

[0018] Please refer to the following: A material tube forming die head lifting drive device. Figures 1-3 The invention features a lifting drive device positioned below the heating and feeding mechanism 1, near the material tube forming head 2. It mainly comprises a drive cylinder 3, a slide table 9, a drive cylinder support 4, two lifting drive plates, and two roller sets 8. The drive rod can be an electric cylinder or a hydraulic cylinder. The drive cylinder is fixed to the drive cylinder support, which is fixedly installed at the rear of the slide table. The slide table is a flat slide table, with its lower end fixedly connected to the frame 10 of the blow molding production equipment. Two guide rails 7 extending in the front-to-back direction are provided on the upper left and right sides of the slide table, with sliders 6 connected to the two guide rails, forming a linear guide rail pair in the front-to-back direction. The two lifting drive plates have identical structures, consisting of a base plate and a vertical plate fixed to the upper middle of the base plate. A lifting inclined surface 5.2.1 is provided at the upper end of the vertical plate, and the lifting inclined surface is inclined upwards from front to back. Two lifting drive plates are fixedly connected to sliders on two guide rails via their respective base plates, and the inclined surfaces on the two lifting drive plates are on the same plane. A connecting plate 5.1 is fixed to the rear end of each of the two lifting drive plates 5.2, so that the two lifting drive plates and the connecting plate together constitute the lifting drive assembly 5. The middle part of the connecting plate is perpendicularly fixed to the cylinder rod end of the electric cylinder. The two roller groups adopt the same structure, consisting of a roller bracket 8.1 and rollers 8.2 rotatably mounted on the lower end of the roller bracket via a wheel axle. The two roller groups are fixed below the base plate of the heating and feeding mechanism via the roller bracket, and the two rollers are in contact with the lifting inclined surfaces on the two lifting drive plates.

[0019] In the above structure, to achieve precise control of the pitch travel, a downwardly extending detection plate 13 is fixed to the outer side of one side of the lifting drive plate. Two switch brackets 11, L-shaped, are installed at the lower end of the slide near the detection plate. Mounting holes are provided on the upright plates of the switch brackets, and a proximity switch 12 is fixedly inserted into each of the mounting holes. To facilitate adjustment of the proximity switch positions and thus achieve pitch angle adjustment, the mounting holes on the switch brackets are elongated slots along the front-to-back direction. The proximity switches are inserted into the elongated slots and locked in place with nuts.

[0020] The working principle of the lifting drive device for the forming head of this tube is as follows:

[0021] When the drive cylinder pushes the two lifting drive plates forward, the lifting ramps on the two lifting drive plates slide in cooperation with the two rollers, driving the two roller sets upward, so that the heating and feeding mechanism drives the tube forming head to lift. When the detection piece is detected by the proximity switch located at the front, the lifting of the head is limited to the position. When the drive cylinder pushes the two lifting drive plates backward, under the action of weight, the two rollers are always pressed against the ramps of the corresponding lifting drive plates, so that the heating and feeding mechanism drives the tube forming head downward. When the detection piece is detected by the proximity switch located at the rear, the downward movement of the head is limited to the position.

[0022] Although embodiments and drawings of the present invention have been disclosed for illustrative purposes, those skilled in the art will understand that various substitutions, variations and modifications are possible without departing from the spirit and scope of the present invention and the appended claims. Therefore, the scope of the present invention is not limited to the contents disclosed in the embodiments and drawings.

Claims

1. A lifting drive device for a tube forming die head, characterized in that: The lifting drive device is integrally located below the heating and feeding mechanism, near the material tube forming head. It includes a drive cylinder, a slide table, a drive cylinder bracket, a lifting drive assembly, and two roller sets. The drive cylinder is fixed to the drive cylinder bracket, which is fixedly installed at the rear of the slide table. The lower end of the slide table is fixedly connected to the frame of the blow molding production equipment. The lifting drive assembly consists of two parallel lifting drive plates and a connecting plate fixed to the rear ends of the two drive plates. The connecting plate is perpendicularly fixed to the cylinder rod end of the drive cylinder. The lower ends of the two lifting drive plates are connected to the upper end of the slide table via linear guide rails arranged in the front-to-back direction. The upper end of each lifting drive plate has an upwardly inclined lifting surface. The two roller sets consist of a roller bracket and rollers rotatably mounted on the lower end of the roller bracket via a wheel axle. The two roller sets are fixed below the base plate of the heating and feeding mechanism via the roller bracket, and the two rollers contact the lifting inclined surfaces on the two lifting drive plates.

2. The tube forming die head lifting drive device according to claim 1, characterized in that: A downward-extending detection plate is fixed on the outer side of the lifting drive plate on one side. Two switch brackets are installed at the lower end of the slide table near the detection plate. The switch brackets are L-shaped and have mounting holes on their upright plates. A proximity switch is fixed in each of the mounting holes of the two switch brackets. The proximity switch near the front end is a lift-up detection switch, and the proximity switch at the rear end is a lower-down detection switch.

3. The tube forming die head lifting drive device according to claim 1, characterized in that: The mounting holes on the switch bracket are elongated slots running in the front-to-back direction; the proximity switch is inserted into the elongated slot and locked in place with a nut.

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