CN102601963A - Equipment for extruding plastic panel with continuously variable cross-section - Google Patents

Abstract

The invention relates to a plastic plate extruding device, which belongs to the field of plastic product processing. A continuously variable cross-section plastic sheet extrusion equipment, comprising an extrusion die part comprising a nozzle joint (1) and a connected extrusion head, the extrusion head (2) comprising an upper die cavity (3 ) and the lower cavity (4), the middle of the upper cavity (3) and the lower cavity (4) is an extrusion runner, and it is characterized in that: the front end of the extrusion head (2) is equipped with an I-shaped slide block, the I-shaped slider is divided into an upper T-shaped block (6) and a lower T-shaped block (7), and the space between the upper and lower T-shaped blocks communicates with the extrusion channel in the middle of the extrusion head (2) , the upper T-shaped block (6) and the lower T-shaped block (7) are respectively connected with servo hydraulic cylinders (8), driven by the servo hydraulic cylinders (8) to move up and down. The invention realizes the automatic control of the preparation of the continuously variable cross-section plastic plate, greatly reduces the waste of materials and reduces the production cost of the enterprise.

Description

A continuously variable section plastic sheet extrusion equipment

technical field

The invention relates to a plastic plate extrusion equipment, in particular to an extrusion equipment for plastic plates with continuously variable cross-sections.

Background technique

Plastic extrusion molding is widely used in production practice, and plastic sheets are more common in life. At present, the thickness of the sheet extruded by the die of the extrusion die is constant, as shown in Figure 1, and many plastic sheet support frames are often non-uniform due to the load, which requires the stiffness and strength of the sheet to be designed according to the load requirements The corresponding thickness, that is, the thickness of the sheet metal is continuously changed, as shown in Figure 2. At present, the thickness of the extruded plastic sheet is fixed, which is inconsistent with the actual thickness change requirements, which often leads to (20-30)% redundancy of the material. In other words, it is due to the lack of design and molding process. Bring a large amount of waste of plastic material, make production cost increase. As we all know, resource shortage is a difficult problem facing the world at present, and various countries have formulated corresponding strategic guidelines for resource conservation, especially China has made energy conservation and emission reduction a national strategic policy. Therefore, it is an important new measure to develop a new process and equipment to prepare a plastic sheet with continuously variable cross-section. The present invention is aimed at this problem, and designs a molding equipment capable of extruding plastic plates with continuously variable cross-sections, which provides a new measure for saving resources and reducing production costs of enterprises.

Plastic sheet is the most widely used material at present, but the current processing technology of sheet mainly adopts extruder to shape through extrusion die, which often has the following problems: (1) Uniformity of extruded sheet thickness: cannot be achieved Extrude a plastic sheet whose thickness varies continuously according to the section designed for rigidity. This will inevitably lead to (20-30)% redundancy of materials. In other words, due to the lack of design and molding process, a large amount of plastic material is wasted, which increases production costs; (2) Poor equipment flexibility: One type of extrusion port can only complete the forming of one specification sheet, lacks flexibility, and is difficult to adapt to sheets of different specifications and thickness.

Contents of the invention

The technical problem to be solved by the present invention is to provide a continuously variable cross-section plastic plate extrusion equipment to solve the deficiencies of the prior art.

Technical solutions

A continuous variable cross-section plastic sheet extrusion equipment, comprising an extrusion die part, the extrusion die part includes a nozzle joint and a connected extrusion head, the extrusion head includes an upper die cavity and a lower die cavity, and the upper die There is a flow blocking rod in the middle of the cavity, and the extrusion flow channel is between the upper cavity and the lower cavity. It is characterized in that: the front end of the extrusion head is equipped with an I-shaped slider. The upper T-shaped block and the lower T-shaped block, the upper and lower T-shaped blocks are combined to form an I-shape, the space between the upper and lower T-shaped blocks is connected with the extrusion flow channel in the middle of the extrusion head, the upper T-shaped block and the lower T-shaped block are respectively Connected with a servo hydraulic cylinder, the servo hydraulic cylinder drives up and down movement.

The servo hydraulic cylinder includes a piston that moves up and down in the cylinder, and the vertical piston on the piston has a piston rod, and the piston rod is fixedly connected with the upper T-shaped block or the lower T-shaped block.

The piston rod is connected with the upper T-shaped block or the lower T-shaped block with a slider connecting rod, and the slider connecting rod is connected with the upper T-shaped block or the lower T-shaped block through a spherical surface, and the spherical surface block is connected by a hexagon socket head cap screw Fastened to upper T-block or lower T-block.

The servo hydraulic cylinder is provided with a displacement sensor, which transmits the motion signal of the upper and lower T-shaped blocks driven by the servo hydraulic cylinder to the controller of the equipment, and the controller of the equipment is connected with the motion controller of the servo hydraulic cylinder, and sends a control signal to control the servo Movement of hydraulic cylinders.

The sensing rod of the displacement sensor is arranged on the piston rod of the servo hydraulic cylinder.

Beneficial effect

In the continuously variable cross-section plastic plate extrusion equipment of the present invention, after the plastic melt enters the cavity through the nozzle joint, the plastic is extruded from the extrusion port with a uniform thickness through the action of the choke rod, and then controlled by the upper and lower servo hydraulic cylinders. The upper T-shaped block or the lower T-shaped block moves up and down according to the input signal, so that the extruded plastic sheet can obtain the required variable-section plastic sheet, and realizes the automatic control of continuous variable-section plastic sheet preparation. The equipment has good flexibility and control accuracy. High, greatly reducing the waste of materials and reducing the production cost of enterprises.

Description of drawings

Figure 1 is a schematic diagram of commonly used plastic sheets.

Fig. 2 is a schematic diagram of a continuously variable section plastic sheet.

Fig. 3 is a schematic diagram of the present invention.

Among them: 1-nozzle joint, 2-extrusion head, 3-upper cavity, 4-lower cavity, 5-choke rod, 6-upper T-block, 7-lower T-block, 8-servo hydraulic cylinder , 9-piston, 10-piston rod, 11-slider connecting rod, 12-spherical block, 13-displacement sensor, 14-sensing rod, 15-support column, 16-servo hydraulic cylinder base.

Detailed ways

The present invention will be further described below in conjunction with specific embodiments and accompanying drawings.

As shown in Figures 1 and 2, the difference between commonly used plastic panels and continuously variable section plastic panels is very obvious. Continuously variable section plastic panels have various specifications and requirements. According to the current processing method, it is time-consuming and expensive. Therefore, the design An extrusion equipment specially designed for continuously variable cross-section plastic sheets.

As shown in accompanying drawing 3, the continuously variable section plastic plate extrusion equipment consists of a servo hydraulic cylinder part and an extrusion die part.

The servo hydraulic cylinder part consists of a displacement sensor 13, a pull rod, a hex nut, a spring washer, a rear cylinder cover, an O-ring, a wear-resistant guide ring, a magnet, a Y-ring, a cylinder barrel, a front cylinder cover, a dust-proof ring, and a leading sleeve, piston rod 10, front buffer plunger, sensing rod 14, piston 9, rear buffer plunger, rear guide sleeve, non-magnetic isolation spacer, position magnet, fixed clip and the like.

The connection form is: the buffer plunger is installed on the piston rod 10, the piston 9 is connected and installed on the piston rod 10 through a magnet, an O-ring is installed between the piston 9 and the piston rod 10, and a Y-shaped sealing ring is installed between the piston 9 and the cylinder. Seals and wear-resistant guide rings. The rear buffer plunger and the rear guide sleeve are installed at the rear end of the piston rod 10. The leading guide sleeve is installed between the front cylinder cover and the piston rod 10, and a Y-shaped sealing ring and a dustproof ring are installed on the front cylinder cover. Displacement sensor 13 is connected on the back cylinder head by flange screw thread, and O type sealing ring is installed between, and in the endoporus (gap) of built-in piston rod 10 of sensing rod 14, on the piston rod 10 of built-in oil cylinder of position magnet. Install the non-magnetic conduction spacer between the position magnet and the piston rod 10, and fix it with a fixed clip. The front cylinder head, rear cylinder head and cylinder barrel are fixed by tie rods, spring washers and hex nuts, and O-rings are installed between the cylinder barrel and the front and rear cylinder heads.

The extrusion die part is composed of an adjusting screw, a nozzle joint 1, a choke rod 5, an upper cavity 3, an upper T-shaped block 6, a lower cavity 4, a lower T-shaped block 7, and the like.

The connection form is: the choke rod 5 is installed in the upper cavity 3, and connected with the adjusting screw, and the size of the choke is adjusted through the adjusting screw. The upper cavity 3 and the lower cavity 4 are connected by two side plates and four hexagon socket screws to form corresponding cavity. The upper T-shaped block 6 and the lower T-shaped block 7 form an I-shaped slider, and the upper T-shaped block 6 and the lower T-shaped block 7 are connected with the piston rod 10 of the servo hydraulic cylinder 8 through the slider connecting rod 11 . The slider connecting rod 11 is connected with the upper T-shaped block 6 and the lower T-shaped block 7 through a spherical surface, and the spherical surface fast 12 is fixed on the upper T-shaped block 6 and the lower T-shaped block 7 by an inner hexagonal screw, and is connected with a gland and an inner Hexagon screw fixation. The slider connecting rod 11 is threadedly coupled with the piston rod 10 and fixed with a conical pin.

The upper and lower T-shaped blocks are respectively connected with servo hydraulic cylinders 8 . The upper servo hydraulic cylinder is fixed on the upper servo hydraulic cylinder fixing flange through a pull rod and a hex nut, and is fixed on the servo hydraulic cylinder base 16 through a support column 15, a pressure plate and an inner hexagon screw.

The lower servo hydraulic cylinder is fixed on the lower servo hydraulic cylinder fixing flange through a pull rod and a hex nut, and is fixed on the servo hydraulic cylinder base 16 through a support column 15, a pressing plate and an inner hexagon screw.

Working form: The plastic melt enters the mold cavity through the nozzle joint 1, and the plastic is extruded from the extrusion port with a uniform thickness through the action of the choke rod 5. Then, through the action of the upper and lower servo hydraulic cylinders, the upper and lower T-shaped blocks are controlled to move up and down according to the input signal, so that the extruded plastic sheet can obtain the required plastic sheet with variable cross-section.

The present invention is owing to adopting: (1) design two T-blocks 6 and 7 respectively up and down on the extruding head, and the two shaped blocks are connected with slide block connecting rod 11 spherical surfaces respectively. Two servo hydraulic cylinders 8 are respectively designed below the top of the last T-shaped block 6 and the lower T-shaped block 7, and displacement sensors 13 are installed outside the servo hydraulic cylinder 8 to control the movement of the two T-shaped blocks up and down. Through the variation of the distance between two T-shaped blocks, it is guaranteed to extrude a plastic sheet with continuously variable section thickness. (2) The size of the extrusion port can be controlled by the servo hydraulic cylinder 8 to control the movement displacement of the two T-shaped blocks, and then the design curve of the thickness of the sheet can be controlled to change according to the requirements. There is no need to replace the extrusion head, so the production of the equipment is flexible and adaptable. ,low cost. (3) Due to the use of high-precision sensors and servo hydraulic cylinders 8 with good rigidity, and online feedback control and thickness error compensation, the thickness precision of the formed plastic sheet is high, which can reach ±0.01mm, which can meet the requirements for high-precision continuous variable section Preparation requirements for plastic panels. In short, this continuously variable cross-section plastic sheet extrusion equipment can adapt to the requirements of the sheet material for thickness change design according to the load requirement. It has good production flexibility and high thickness control accuracy, which greatly reduces the waste of materials and reduces the production cost of the enterprise.

Plates with continuously variable cross-sections can be widely used in industrial production and daily life, and the invention provides a novel device for preparing plastic plates with variable cross-sections. With the rapid development of plastic molding technology, plastic sheets are used more and more widely in daily life, which provides a broad background for the application of this equipment. Adopting the continuous variable cross-section plastic sheet extrusion equipment of the present invention will provide a great support for the production of plastic products. The device provides a device with simple structure, effectively reduced cost and greatly improved material utilization rate.

Claims (5)

1. continuous variable cross section plastic plate extrusion equipment; Comprise the extrusion die part, said extrusion die partly comprises nozzle connection (1) and the extruder head that links to each other, and said extruder head (2) comprises upper impression (3) and lower impressions (4); In the middle of upper impression (3), be provided with choked flow rod (5); In the middle of upper impression (3) and the lower impressions (4) is extrusion channel, and it is characterized in that: the front end face of said extruder head (2) adds I-shaped slide block, and said I-shaped slide block is divided into T shape piece (6) and following T shape piece (7); T shape piece is formed I-shaped altogether up and down; Space between the T shape piece is communicated with the middle extrusion channel of extruder head (2) up and down, and last T shape piece (6) and following T shape piece (7) are connected with servo hydraulic cylinder (8) respectively, is driven by servo hydraulic cylinder (8) to move up and down.

2. continuous variable cross section plastic plate extrusion equipment as claimed in claim 1; It is characterized in that: said servo hydraulic cylinder (8) comprises the piston (9) that moves up and down in the cylinder; Piston (9) is gone up vertical piston has piston rod (10), and said piston rod (10) is fixedly connected with last T shape piece (6) or following T shape piece (7).

3. continuous variable cross section plastic plate extrusion equipment as claimed in claim 2; It is characterized in that: said piston rod (10) and last T shape piece (6) or be connected with slide block connecting rod (11) between the T shape piece (7) down; Slide block connecting rod (11) and last T shape piece (6) or connect through sphere between the T shape piece (7) down, sphere piece (12) is fixed on T shape piece (6) or time T shape piece (7) through soket head cap screw.

4. according to claim 1 or claim 2 continuous variable cross section plastic plate extrusion equipment; It is characterized in that: said servo hydraulic cylinder (8) is provided with displacement transducer (13); The motor message of the shape of the T up and down piece that servo hydraulic cylinder (8) is driven sends the controller of equipment to; The controller of equipment links to each other with the motion controller of servo hydraulic cylinder (8), the motion of the control servo hydraulic cylinder (8) that transmits control signal.

5. continuous variable cross section plastic plate extrusion equipment as claimed in claim 4 is characterized in that: the sensor bar (14) of said displacement transducer (13) is arranged on the piston rod (10) of servo hydraulic cylinder (8).

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