CN207373659U - A single-screw extruder for engineering plastics - Google Patents

Abstract

The utility model discloses an engineering plastic single screw extruder, which comprises an extruding cylinder, a feeding cylinder and supporting legs, wherein the left side of the upper end of the extruding cylinder is provided with the feeding cylinder, the middle part in the extruding cylinder is horizontally provided with a screw, the screw is welded with helical blades, the two sides of the upper end of the extruding cylinder are communicated with branch pipes, the middle parts of two straight pipes are communicated with a main pipe, the main pipe is connected with a suction fan, the extruding cylinder comprises a heating layer, an electric heating wire is spirally wound in the heating layer, the inner side of the heating layer is fixedly connected with a heat-conducting layer, the outer side of the heat-conducting layer is fixedly connected with a vacuum heat-insulating layer, and the outer side of the vacuum heat-insulating layer is fixedly connected with a heat-insulating layer, the utility model has simple structure and reasonable design, the processing quality of engineering plastic can be effectively improved by mixing and preheating, reducing the harm to the environment.

Description

A single-screw extruder for engineering plastics

technical field

The utility model relates to an extruder, in particular to an engineering plastic single-screw extruder.

Background technique

Engineering plastics can be used as engineering materials and plastics that replace metal manufacturing machine parts, etc. Engineering plastics have excellent comprehensive properties, high rigidity, small creep, high mechanical strength, good heat resistance, and good electrical insulation. It can be used in the chemical and physical environment for a long time, and can replace metals as engineering structural materials, but the price is more expensive and the output is small.

The processing of engineering plastics requires the use of extruders. Modern extruders mainly include single-screw extruders and twin-screw extruders, but most modern extruders have defects, such as the extrusion of modern extruders. The insulation effect of the cylinder is not good, which leads to the easy loss of the temperature inside the extrusion cylinder, which increases the energy consumption. In addition, when the plastic is heated to a molten state, more waste gas will be generated, which is harmful to human health and the environment. In addition Modern extruders do not have a preheating structure, which causes raw materials to enter the extrusion barrel, causing poor melting effect and reducing the quality of finished products.

For this reason, aiming at the problems raised in the above-mentioned background technology, those skilled in the art have proposed a new type of extruder.

Utility model content

The purpose of this utility model is to provide an engineering plastic single-screw extruder to solve the problems raised in the above-mentioned background technology.

In order to achieve the above object, the utility model provides the following technical solutions:

An engineering plastic single-screw extruder, comprising an extrusion cylinder, a feed cylinder and a supporting leg, the upper end of the extrusion cylinder is provided with a feed cylinder on the left side, and the feed cylinder communicates with the inside of the extrusion cylinder; The right side of the upper end of the barrel is connected with a feed pipe, and the outer middle part of the upper end of the barrel is fixedly installed with a first motor, and the lower output end of the first motor is connected with a stirring shaft, and a plurality of stirring blades are welded on the stirring shaft; A heating box is fixedly installed on the inner wall of the feeding cylinder, and an electric heating plate is arranged inside the heating box. ; The middle part of the extruding barrel is horizontally provided with a screw, and the screw is welded with a helical blade, and the left end of the screw goes out of the extruding barrel and is connected to the output shaft of the second motor; the two sides of the bottom of the extruding barrel are fixedly connected There are supporting legs, and the right side of the extrusion cylinder is connected with an extrusion die; the two sides of the upper end of the extrusion cylinder are connected with branch pipes, and the middle parts of the two straight pipes are connected with the main pipe, and the main pipe is connected with a suction fan; The output cylinder includes a heating layer, the heating layer is spirally wound with an electric heating wire, the inside of the heating layer is fixedly connected with a heat conduction layer, the outside of the heat conduction layer is fixedly connected with a vacuum heat insulation layer, and the outside of the vacuum heat insulation layer is fixedly connected with an insulation layer.

Further, the bottom of the feeding cylinder is a conical structure.

Further, the length of the stirring blades gradually decreases from top to bottom.

Further, the end of the main pipe is connected with a sodium hydroxide solution tank.

Further, the heat conducting layer is made of copper material.

Further, the insulation layer is made of asbestos material.

Compared with the prior art, the beneficial effect of the utility model is: the material is fed through the feeding pipe, and the material is mixed under the agitation of the stirring blade, and at the same time, the heating box heats the material, which can effectively preheat the material and improve the For the extrusion quality later, if the plastic product contains a variety of color masterbatches, the stirring blade can also quickly mix the materials. In addition, the existence of the stirring blade can prevent the connection between the feeding cylinder and the extrusion cylinder from clogging, and finally the material from The toxic and harmful gas produced by the extruder is extruded in the extrusion die, and the toxic and harmful gas generated by the extruder is absorbed by the sodium hydroxide solution tank through the straight pipe and the main pipe, reducing the harm to the human body and the environment. The heating wire makes the heating effect more uniform, and the vacuum insulation layer and thermal insulation layer can prevent heat loss.

Description of drawings

Figure 1 is a schematic structural view of an engineering plastic single-screw extruder.

Fig. 2 is a schematic structural diagram of a heating box in a single-screw extruder for engineering plastics.

Fig. 3 is a schematic structural view of an extrusion barrel in a single-screw extruder for engineering plastics.

Fig. 4 is a schematic structural diagram of an electric heating wire in an engineering plastic single-screw extruder.

Detailed ways

The technical solution of this patent will be further described in detail below in conjunction with specific embodiments.

Please refer to Fig. 1-4, a single-screw extruder for engineering plastics, including an extrusion cylinder 10, a feed cylinder 4 and a support leg 11, the upper left side of the extrusion cylinder 10 is provided with a feed cylinder 4, and The barrel 4 communicates with the inside of the extrusion barrel 10; the upper right side of the feeding barrel 4 is connected with the feeding pipe 2, and the outer middle part of the upper end of the feeding barrel 4 is fixedly installed with the first motor 1, and the bottom of the first motor 1 The output end is connected with a stirring shaft 6, and a plurality of stirring blades 5 are welded on the stirring shaft 6; a heating box 3 is fixedly installed on the inner wall of the feeding cylinder 4, and an electric heating plate 17 is arranged inside the heating box 3, and electric heating The two ends of the plate 17 are fixedly connected with the inner wall of the heating box 3 through the connecting seat 19, and the two sides of the electric heating plate 17 are connected with electric heating sheets 18; The screw blade 9 is welded, and the left end of the screw rod 8 passes through the extrusion cylinder 10 and is connected to the output shaft of the second motor 7; the two sides of the bottom end of the extrusion cylinder 10 are fixedly connected with supporting legs 11, and the right The side is connected with an extrusion die 16; both sides of the upper end of the extrusion cylinder 10 are connected with branch pipes 12, and the middle parts of the two straight pipes 12 are connected with the main pipe 14, and the main pipe 14 is connected with a suction fan 13; the extrusion cylinder 10 includes a heating layer 22, an electric heating wire 24 is spirally wound inside the heating layer 22, a heat conducting layer 23 is fixedly connected to the inner side of the heating layer 22, and a vacuum heat insulating layer 21 is fixedly connected to the outside of the heat conducting layer 23, and the vacuum heat insulating layer 21 The outer side is fixedly connected with a thermal insulation layer 20 .

As mentioned above, the bottom of the feeding cylinder 4 has a conical structure.

As mentioned above, the length of the stirring blade 6 decreases gradually from top to bottom.

Appeal, the end of main pipe 14 is connected with sodium hydroxide solution tank 15.

As mentioned above, the heat conduction layer 23 is made of copper material, and the heat conduction effect of copper is very good.

As mentioned above, the insulation layer 20 is made of asbestos material.

The working principle of the utility model is: the material is fed through the feeding pipe 2, and the material is mixed under the agitation of the stirring blade 5. At the same time, the heating box 3 heats the material, which can effectively preheat the material and improve the subsequent extrusion process. Quality, if the plastic product contains multiple color masterbatches, the mixing blade 5 can also quickly mix the materials. In addition, the existence of the stirring blade 5 can prevent the connection between the feeding cylinder 4 and the extrusion cylinder 10 from clogging, and finally the material from Extruded in the extrusion die 16, the poisonous and harmful gas generated when the extruder is working, is absorbed by the sodium hydroxide solution tank 15 through the straight pipe 12 and the main pipe 14, reducing the harm to the human body and the environment, and is also absorbed by the extrusion cylinder 10 The inner helically wound electric heating wire 24 makes the heating effect more uniform, and the vacuum heat insulation layer 21 and the heat insulation layer 20 can prevent heat loss.

The preferred implementation of this patent has been described in detail above, but this patent is not limited to the above-mentioned implementation, and within the knowledge of those of ordinary skill in the art, it can also be made without departing from the purpose of this patent. Variations.

Claims (6)

1. A single-screw extruder for engineering plastics, comprising an extrusion barrel, a feed barrel and a support leg, is characterized in that, the left side of the upper end of the extrusion barrel is provided with a feed barrel, and the feed barrel and the extrusion barrel Internal communication; the upper right side of the feeding cylinder is connected with a feeding pipe, the outer middle part of the upper end of the feeding cylinder is fixedly installed with a first motor, the lower output end of the first motor is connected with a stirring shaft, and there are multiple welding shafts on the stirring shaft. a stirring blade; a heating box is fixedly installed on the inner wall of the feeding cylinder, and an electric heating plate is arranged in the heating box, and the two ends of the electric heating plate are fixedly connected with the inner wall of the heating box through a connecting seat, and the two ends of the electric heating plate The side is connected with an electric heating sheet; the middle part of the extrusion barrel is horizontally provided with a screw, and a spiral blade is welded on the screw, and the left end of the screw goes out of the extrusion barrel and is connected to the output shaft of the second motor; Both sides of the bottom end are fixedly connected with supporting legs, and the right side of the extrusion cylinder is connected with an extrusion die; the two sides of the upper end of the extrusion cylinder are connected with branch pipes, and the middle parts of the two straight pipes are connected with the main pipe, and the main pipe is connected with Suction fan; the extrusion cylinder includes a heating layer, the heating layer is spirally wound with an electric heating wire, the inside of the heating layer is fixedly connected with a heat conduction layer, the outside of the heat conduction layer is fixedly connected with a vacuum heat insulation layer, and the outside of the vacuum heat insulation layer The fixed connection has an insulation layer. 2. The engineering plastics single-screw extruder according to claim 1, wherein the bottom of the feeding barrel is a conical structure. 3. The engineering plastic single-screw extruder according to claim 1, wherein the length of the stirring blade gradually decreases from top to bottom. 4. The engineering plastics single-screw extruder according to claim 1, wherein the end of the main pipe is connected with a sodium hydroxide solution tank. 5. The engineering plastics single-screw extruder according to claim 1, wherein the heat conducting layer is made of copper material. 6. The engineering plastic single-screw extruder according to claim 1, characterized in that, the insulation layer is made of asbestos material.