CN210651810U - High-filling machine barrel for plastic extruder - Google Patents

Abstract

The utility model discloses a high filling barrel for plastics extruder, including the multistage barrel, detachable connects between the multistage barrel, and the multistage barrel divide into feed section, compression section and ejection of compact section in proper order, and detachably is equipped with the neck bush in ejection of compact section at least, and the neck bush adopts wearability alloy material and makes through quenching treatment, and the hardness of neck bush is 58-62 HRC. The machine barrel is set into a multi-section barrel structure, and the inner bushing is detachably assembled in at least the discharging section, so that once the inner bushing is worn, only the inner bushing needs to be replaced, and the manufacturing can be simplified and the cost can be reduced; the inner bushing is made of wear-resistant materials through quenching, the hardness reaches 58-62HRC, the overall hardness is higher, the wear resistance is better, the extrusion operation of high-filling materials and a discharging section with heavy wear can be performed, and the service life is longer.

Description

High-filling machine barrel for plastic extruder

Technical Field

The utility model relates to a plastics extrude technical field, in particular to a high packing barrel for plastics extruder, mainly used SPC floor, WPC floor, PP bellows wait the extrusion production of filling goods.

Background

SPC is an abbreviation of Stone Plastic Composites, the main raw material is polyvinyl chloride resin, an extruder is combined with a T-shaped die to extrude an SPC base material, a three-roll or four-roll calender is used to respectively heat, laminate and emboss a PVC wear-resistant layer, a PVC color film and the SPC base material at one time, and glue is not used in the production process. WPC is a new composite material, and is characterized by being green and environment-friendly and replacing wood with plastic. Wood Plastic Composites (WPC) are an emerging class of materials, and in the most general sense the acronym WPC stands for a broad class of composites made from virgin or recycled plastics, such as High Density Polyethylene (HDPE), polypropylene (PP), Polystyrene (PS) and polyvinyl chloride (PVC), with natural fiber fillers, including Wood flour and scrim fibers. Polypropylene, PP for short, is a colorless, odorless, nontoxic and semitransparent solid substance. Polypropylene (PP) is a thermoplastic synthetic resin with excellent performance, and is colorless translucent thermoplastic light general-purpose plastic. The polypropylene has chemical resistance, heat resistance, electrical insulation, high-strength mechanical property, good high-wear-resistance processing property and the like, so that the polypropylene can be rapidly and widely developed and applied in a plurality of fields such as machinery, automobiles, electronic and electric appliances, buildings, textiles, packaging, agriculture, forestry, fishery, food industry and the like since the coming out.

Chinese utility model patent with publication number CN207044652U discloses a split type barrel, which is divided into a plurality of barrel sections with the barrel, and the connection can be dismantled between the plurality of barrel sections, thereby being convenient for process each barrel section on the barrel alone, realizing the replacement of different wearing barrel sections of the barrel. This has only changed the structure constitution of barrel, reforms transform into split type multistage barrel structure from traditional integral barrel, and fails to propose the improvement to the wear resistance of barrel, needs to realize the extrusion operation through frequently overhauing and changing the corresponding section of barrel, and it is comparatively troublesome to operate.

Chinese utility model patent publication No. CN208867533U discloses a multi-section combined barrel for extruder, which comprises a barrel and an inner bushing arranged on the inner wall of the barrel, wherein the inner bushing is composed of at least two sections of different split bushings, and the split bushing is made of one of nickel-based alloy, cobalt-based alloy and iron-based alloy. The barrel of this structure, because the neck bush of every section barrel is split type structure, and what adopt is that powder metallurgy's technology sintering forms, need make the mould that is suitable for the barrel hole in the barrel, the mould is made the degree of difficulty big, unable batch production, in case the neck bush takes place wearing and tearing, then need change in the lump together with the barrel, and the neck bush that makes does not carry out further surface process and handles, just based on the wear resistance of wear-resisting material itself, to the heavier ejection of compact section of high packing material and wearing and tearing, then need select for use the wear-resisting material of higher grade, it is big to make the degree of difficulty, the cost is higher.

According to the traditional conical double-cylinder, the inner hole of the cylinder is treated by adopting a nitriding process, so that a thin nitriding layer is formed in the inner hole of the cylinder and is suitable for abrasion, but the thickness of the nitriding layer of the inner hole of the cylinder is only 0.5-0.7mm, the hardness of the nitriding layer is reduced along with the nitriding depth, and when high-filling products such as SPC (SPC), WPC (wood-Plastic composite) floors, PP corrugated pipes and the like are produced, once the nitriding layer is abraded, the inner hole abrasion speed of the discharge section of the cylinder is greatly accelerated, gaps among screw cylinders are increased, screws are enabled to warp upwards and are mutually occluded together.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, the utility model aims at providing a simplify manufacturing and reduce cost, wear resistance is higher, life is longer a high filling barrel for plastics extruder.

In order to realize the purpose of the utility model, the utility model adopts the following technical scheme:

a high-filling machine barrel for a plastic extruder comprises a plurality of sections of barrels, wherein the barrels are detachably connected, the plurality of sections of barrels are sequentially divided into a feeding section, a compression section and a discharging section, at least an inner bushing is detachably assembled in the discharging section, the inner bushing is made of wear-resistant alloy materials through quenching treatment, and the hardness of the inner bushing is 58-62 HRC.

In the above-described aspect, preferably, the inner liner has a hardness equal to that of the inner liner in a longitudinal direction thereof.

In the above technical solution, preferably, the feeding section, the compressing section, and the discharging section are all equipped with the inner lining.

In the above technical solution, preferably, the wear-resistant alloy material is hot-work alloy steel.

In the above technical solution, preferably, each section of the cylinder has a pair of mounting holes penetrating through the cylinder and extending along the length direction of the cylinder, each section of the cylinder has a center line, the pair of mounting holes are distributed along two opposite sides of the center line and communicated with each other at the center line, the pair of inner liners are respectively assembled in the pair of mounting holes, one side of each inner liner is provided with an opening extending along the length direction of the inner liner, and the pair of inner liners are spliced at the opening.

In the above technical solution, preferably, the inner bore diameter of the inner bushing is 55: 110-110: 220.

the machine barrel is set into a multi-section barrel structure, and the inner bushing is detachably assembled in at least the discharging section, so that once the inner bushing is worn, only the inner bushing needs to be replaced, and the manufacturing can be simplified and the cost can be reduced; the inner bushing is made of wear-resistant materials through quenching, the hardness reaches 58-62HRC, the overall hardness is higher, the wear resistance is better, the extrusion operation of high-filling materials and a discharging section with heavy wear can be performed, and the service life is longer.

Drawings

FIG. 1 is a schematic view of a cross-sectional structure of a discharging section of the present invention;

FIG. 2 is a view taken from the direction A of FIG. 1;

FIG. 3 is a view from the direction B of FIG. 1;

FIG. 4 is a schematic cross-sectional structure view of the barrel of the discharging section of the present invention;

FIG. 5 is a view taken along line C of FIG. 4;

FIG. 6 is a view from direction D of FIG. 4;

FIG. 7 is a schematic view of the structure of the upward section of the inner liner of the discharging section of the present invention;

FIG. 8 is a schematic cross-sectional view of the discharge section of the present invention with the opening of the inner liner facing one side;

FIG. 9 is a view in the direction E of FIG. 7;

FIG. 10 is a view from direction F of FIG. 7;

wherein: 1. a barrel; 11. a centerline; 12. mounting holes; 2. an inner liner; 21. and (4) opening.

Detailed Description

To explain the technical content, structural features, achieved objects and functions of the present invention in detail, the following detailed description is made with reference to the accompanying drawings.

The utility model discloses on the mainly used plastics extruder, the constitution of its barrel constitutes for the connection structure can be dismantled to the multistage barrel, and the multistage barrel divide into feed section, compression section and ejection of compact section in proper order, because the intensity of wear of ejection of compact section barrel is higher, following mainly uses ejection of compact section barrel as an example, the concrete description the utility model discloses a barrel structure. The utility model discloses mainly used awl twin-screw extruder, of course, other extruder barrels also can adopt the utility model discloses a barrel structure. The utility model is suitable for an inner hole aperture is 55: 110-110: 220, the applicable conical double-screw extruder has wider range.

As shown in fig. 1-3, an inner bushing 2 is detachably assembled in a cylinder 1 of a discharging section, and the inner bushing 2 can be assembled in the cylinder 1 in a shrink fit manner, so that the assembly is convenient and fast, and the inner bushing is replaceable. As shown in fig. 4-6, the cylinder 1 has a pair of mounting holes 12 extending through the cylinder 1 along the length direction thereof, the cylinder 1 has a center line 11, the pair of mounting holes 12 are distributed along opposite sides of the center line 11 and communicated with each other at the center line 11, the pair of inner liners 2 are provided, the pair of inner liners 2 are respectively assembled in the pair of mounting holes 12, as shown in fig. 7-10, an opening 21 extending along the length direction thereof is provided at one side of each inner liner 2, and the pair of inner liners 2 are spliced at the opening 21 thereof. The inner bush 2 is made of wear-resistant alloy material, and is subjected to quenching treatment to make the overall hardness reach 58-62HRC, and the inner bush 2 has the same hardness along the length direction thereof. Compare the barrel that adopts nitriding treatment among the prior art to form thinner nitrided layer on barrel inner bore wall, the utility model discloses an inside lining cover has higher hardness and better wear resistance, even if when the inside lining produces the wearing and tearing condition of not equidimension, only need change the inside lining can, manufacturing process is fairly simple, and it is also more convenient to assemble.

In this example, the wear-resistant alloy material used to form the inner liner may be a hot-work alloy steel, which has a high hardness and good wear resistance. Of course, other alloy materials with excellent wear resistance can be adopted, and finally the hardness of the alloy material is improved through quenching. In addition to the structure of assembling the inner bush in the cylinder of the discharging section, the inner bush can be assembled in the feeding section and the compressing section, and the inner bushes with different wear resistance can be assembled according to different wear strengths of the multi-section cylinder. Therefore, the utility model discloses be applicable to very much like the extrusion operation of the heavier ejection of compact section of high packing material and wearing and tearing, can simplify the manufacturing and reduce cost, life are longer, are worth promoting.

The above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose of the embodiments is to enable people skilled in the art to understand the contents of the present invention and to implement the present invention, which cannot limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.

Claims (6)

1. The utility model provides a high machine barrel of filling for plastic extruder, includes multistage barrel (1), the multistage barrel (1) between detachable connect, the multistage barrel (1) divide into feed section, compression section and play material section, its characterized in that in proper order: at least an inner bushing (2) is detachably assembled in the discharging section, the inner bushing (2) is made of wear-resistant alloy materials through quenching treatment, and the hardness of the inner bushing (2) is 58-62 HRC.

2. The highly filled barrel for a plastic extruder of claim 1, wherein: the inner liner (2) has an equivalent stiffness along its length.

3. The highly filled barrel for a plastic extruder of claim 1, wherein: the feeding section, the compression section and the discharging section are all internally provided with the inner lining (2).

4. The highly filled barrel for a plastic extruder of claim 1, wherein: the wear-resistant alloy material is hot-work alloy steel.

5. The highly filled barrel for a plastic extruder of claim 1, wherein: each section of the cylinder body (1) is provided with a pair of mounting holes (12) penetrating through the cylinder body (1) and extending along the length direction of the cylinder body, each section of the cylinder body (1) is provided with a center line (11), the pair of mounting holes (12) are distributed along two opposite sides of the center line (11) and are communicated at the position of the center line (11), the pair of inner linings (2) are respectively assembled in the pair of mounting holes (12), one side of each inner lining (2) is provided with an opening (21) extending along the length direction of the inner lining, and the pair of inner linings (2) are spliced at the position of the opening (21).

6. The highly filled barrel for a plastic extruder of claim 1, wherein: the inner hole aperture of the inner bushing is 55: 110-110: 220.

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