CN209955266U

CN209955266U - Extrusion screw for blow molding machine

Info

Publication number: CN209955266U
Application number: CN201920799401.6U
Authority: CN
Inventors: 张建群; 戴强; 杨如方
Original assignee: Shandong Tongjia Intelligent Equipment Co Ltd
Current assignee: Shandong Tongjia Intelligent Equipment Co Ltd
Priority date: 2019-05-30
Filing date: 2019-05-30
Publication date: 2020-01-17
Anticipated expiration: 2029-05-30

Abstract

An extrusion screw for a blow molding machine comprises a feeding section, a melting section and a homogenizing section, and is characterized in that a material expanding section is further arranged between the melting section and the homogenizing section, the material expanding section is of a spiral groove-shaped structure, 8 spiral grooves are uniformly arranged on the material expanding section, the groove width of each spiral groove is 22.8mm, and the lead between every two spiral grooves is 450 mm; the material expanding section is arranged between the melting section and the homogenizing section, so that the extrusion capacity is higher, and the production capacity of the homogenizing section is improved.

Description

Extrusion screw for blow molding machine

Technical Field

The utility model relates to a blowing technical field especially relates to a blowing machine is with extruding screw rod.

Background

The working part of the extrusion screw of the traditional blow molding machine can be divided into three sections: a charging section, a melting section, and a homogenizing section. A feeding section: mainly to compact and transport the plastic. The working process of the section is that after the plastic enters the screw from the hopper, the plastic is conveyed forwards and compacted under the action of the rotating screw through the friction action of the inner wall of the machine barrel and the surface of the screw. The plastic remains substantially solid in the feeding section. The length of the screw in the feeding section varies with the type of plastic, with the longest extruded crystalline polymer, the second shortest rigid amorphous polymer and the shortest soft amorphous polymer.

A melting section: the compression section is also called as compression section, and the compression section is used for further compacting and plasticizing the plastic and pressing air entrained in the plastic back to the feeding port for discharging. The channel section should be of the compression type and the working process is that after the plastic enters the melting section from the feeding section, the plastic is gradually compacted because the channel becomes gradually shallower and the back pressure generated by the screen, perforated plate and head creates high pressure in the plastic as the plastic is continuously conveyed forward. Meanwhile, the materials are heated from the outside of the machine barrel and are strongly stirred, mixed and sheared by the screw and the machine barrel, the materials begin to melt, the liquid phase is continuously increased along with the advancing process, the solid phase is continuously reduced, and all or most of the plastic is converted into a sticky state to the tail end of a melting area.

A homogenizing section: also called homogenizing section or metering section, the plastic is further plasticized after entering the homogenizing section and is extruded from the screw in constant pressure, quantity and temperature. In the practical production process, the discharge speed of the melting section determines the production efficiency of the homogenizing section, and the discharge speed of the melting section is low, so that the production capacity of the homogenizing section is limited, and the production efficiency of the whole production process is low.

Disclosure of Invention

In order to solve the problem, the utility model provides an extrusion screw for blowing machine provides a faster screw rod of ejection of compact speed. In order to achieve the above purpose, the utility model adopts the following technical scheme: the utility model provides an extrusion screw for blowing machine, includes reinforced section, melts section and homogenization section, melts and still is provided with the material expanding section between section and the homogenization section, the material expanding section set up to spiral groove column structure, the material expanding section evenly is provided with 8 spiral grooves, the groove width of spiral groove sets up to 22.8mm, and the helical pitch between the spiral groove sets up to 450 mm.

Furthermore, the selection direction of the spiral groove is set to be right-handed, and the spiral groove comprises a spiral groove front end and a spiral groove rear end.

Further, the groove depth of the blind groove end at the front end of the spiral groove gradually becomes shallow from a preset size to 0 within 15mm on the shaft.

Further, the groove depth of the blind groove end at the rear end of the spiral groove is gradually changed from 0 to a preset size within 15mm on the shaft.

Compared with the prior art, the utility model discloses following beneficial effect has: the material expanding section is arranged between the melting section and the homogenizing section, so that the extrusion capacity is higher, and the production capacity of the homogenizing section is improved.

Drawings

The present invention will be described in further detail with reference to the accompanying drawings.

FIG. 1 is a schematic structural diagram of the present invention;

FIG. 2 is a schematic view of a portion of the structure at II;

FIG. 3 is a schematic cross-sectional view of B-B;

in the drawings: 1. the device comprises a feeding section, a melting section, a homogenizing section, a material expanding section, a screw groove front end 51, a screw groove rear end 52 and a screw groove, wherein the feeding section comprises 2 parts of a feeding section, a melting section and 3 parts of a homogenizing section.

Detailed Description

In order to make the technical solution of the present invention better understood by those skilled in the art, the present invention will be further described with reference to fig. 1, fig. 2, fig. 3 and the specific embodiments.

As shown in the attached drawings 1, 2 and 3, the extrusion screw for the blow molding machine comprises a feeding section 1, a melting section 2 and a homogenizing section 3, wherein a material expanding section 4 is further arranged between the melting section 2 and the homogenizing section 3, the material expanding section 4 is of a spiral groove-shaped structure, 8 spiral grooves 5 are uniformly arranged on the material expanding section 4, the groove width of each spiral groove 5 is 22.8mm, and the lead between the spiral grooves 5 is 450 mm.

Further, the orientation of the spiral groove 5 is set to be right-handed, and comprises a spiral groove front end 51 and a spiral groove rear end 52.

Further, the groove depth of the blind groove end of the spiral groove front end 51 is gradually reduced from a preset size to 0 within 15mm on the shaft, and feeding is easier.

Furthermore, the groove depth of the blind groove end of the spiral groove rear end 52 gradually changes from 0 to a preset size within 15mm on the shaft, so that the material is easier to discharge.

The utility model discloses a theory of operation and working process as follows: be provided with between melting section 2 and the homogenization section 3 and expand material section 4, the material is after melting, gets into homogenization section 3 through the spiral groove 5 of expanding material section 4, and the load of spiral groove 5 is bigger, and more materials get into homogenization section 3, have improved the productivity effect of homogenization section 3.

Utilize technical scheme, or technical personnel in the field are in the utility model discloses under technical scheme's the inspiration, design similar technical scheme, and reach above-mentioned technological effect, all fall into the utility model discloses a protection scope.

Claims

1. The utility model provides a blowing machine is with extruding screw rod, is provided with between section (2) and homogenization section (3) and expands material section (4) including reinforced section (1), melting section (2) and homogenization section (3) characterized by, expand material section (4) set up to the spiral shell groove column structure, expand material section (4) and evenly be provided with 8 spiral shells groove (5), the groove width of spiral shell groove (5) sets up to 22.8mm, and the helical pitch between spiral shell groove (5) sets up to 450 mm.

2. Extrusion screw according to claim 1, characterised in that the orientation of the groove (5) is arranged to be right-hand, comprising a groove front end (51) and a groove rear end (52).

3. Extrusion screw according to claim 2, characterised in that the blind groove end of the groove front end (51) has a groove depth which tapers from a predetermined dimension to 0 within 15mm on the shaft.

4. Extrusion screw according to claim 2, characterised in that the groove depth of the blind groove end of the groove rear end (52) is gradually changed from 0 to a predetermined dimension within 15mm on the shaft.