CN216300116U

CN216300116U - High-transparency high-fluidity thin-wall extrusion screw

Info

Publication number: CN216300116U
Application number: CN202121028996.9U
Authority: CN
Inventors: 沈琪; 杨国林; 唐勤宝; 姚海峰
Original assignee: Zhejiang Jiacheng Machinery Co ltd
Current assignee: Zhejiang Jiacheng Machinery Co ltd
Priority date: 2021-05-14
Filing date: 2021-05-14
Publication date: 2022-04-15
Anticipated expiration: 2031-05-14

Abstract

A high-transparency high-fluidity thin-wall extrusion screw comprises a screw body, a rod handle, a clamping groove, a threaded connection section, a feeding port, a compression section, a metering section, a pin, a separation head, a groove and a screw ridge. The utility model has the advantages that: according to the characteristics of the used raw materials and the actual requirements of products, the screw adopts a hard alloy steel screw, the surface of the screw adopts a heat treatment process, the whole screw is plated with hard chromium, and double alloys are spray-welded on the tops of screw threads, so that the whole hardness of the screw is improved, and the wear resistance and corrosion resistance are improved; through the increase compression ratio, deepen the kerve, set up the pin and set up the multiunit slot at the separation head in the measurement section, change the mobility of material, solved the TPU material when producing ultra-thin wall thickness, the shaping degree of difficulty is big, and the technical bottleneck that the shaping precision is difficult to control guarantees raw materials plastify effect, guarantees the high transparency of goods, high gloss.

Description

High-transparency high-fluidity thin-wall extrusion screw

Technical Field

The utility model relates to a high-transparency high-fluidity thin-wall extrusion screw, belonging to the technical field of screws.

Background

Thermoplastic polyurethane elastomer (TPU) is recognized as a novel environment-friendly high polymer material with excellent performance. TPU has become one of the important thermoplastic elastomer materials due to its excellent comprehensive properties of high strength, high toughness, wear resistance, oil resistance and the like and wide application. At present, the TPU industry is rapidly developed, new technologies, new products and new applications related to the TPU industry are continuously developed, the applications of the TPU almost extend to various industries, and the TPU is widely applied to many fields such as shoe materials, clothes, pipes, films, sheets, cables, automobiles, buildings, medical and health, national defense, sports and leisure and the like. Although TPU products are continuously developed and put into the market, TPU materials become one of the fastest-developing thermoplastic materials, and a targeted screw is not designed and adopted according to the characteristics of the TPU materials and the actual requirements of the TPU products in the actual extrusion molding process. Particularly, when a TPU thin-wall part is formed by extrusion, the defects of insufficient compactness, glue deficiency, uneven appearance surface, air hole lines, scorched particles and the like of a product are caused by the problems of high flowability of the TPU material, difficult forming of the ultrathin wall thickness and the like, so that the quality of the product is influenced. Therefore, a screw specially used for extrusion molding of a TPU thin-wall part is urgently needed to be researched and designed, and the defects that the molding difficulty is high and the molding precision is difficult to control when a TPU material is used for producing an ultrathin wall are overcome.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a high-transparency high-fluidity thin-wall extrusion screw.

The utility model aims to solve the problems that the existing TPU material has large forming difficulty and difficult control of forming precision when producing ultrathin wall thickness.

In order to realize the purpose of the utility model, the technical scheme adopted by the utility model is as follows:

high transparent high mobility thin wall extrusion screw rod, including screw rod body, pole handle, draw-in groove, threaded connection section, feeding section, feed inlet, compression section, measurement section, pin, separation head, slot and spiral shell arris, characterized by: the screw rod body is sequentially provided with a rod handle, a threaded connection section, a feeding section, a compression section, a metering section and a separation head, a clamping groove is formed in the outer wall of the tail end of the rod handle, a feeding hole is formed in the feeding section, screw edges are formed in the feeding section, the compression section and the metering section, a pin section is arranged on the metering section, a pin is arranged on the pin section, the separation head is arranged at the front end of the metering section, and a plurality of groups of grooves are uniformly distributed in an inclined mode on the outer wall of the separation head.

Further, the screw body is made of hard alloy steel; the screw body is subjected to quenching and tempering treatment, and the hardness is adjusted to 250- & ltSUB & gt 280- & gt; the whole body of the screw is plated with hard chromium, the hardness is over 900HV, and the thickness of a plating layer is 0.06 mm-0.1 mm.

Furthermore, the spray welding double alloy on the top of the screw ridge tooth has the single-side thickness of 0.8-1.0mm and the hardness of HRC 58-62.

Further, the screw body is of an equidistant and unequal-depth screw structure.

Furthermore, the feeding section is a long outer diameter tolerance gradual change section and is of an equidistant equal-depth screw structure.

Further, the compression section and the metering section are of equidistant and gradually-changed screw structures; the depth of the screw grooves on the compression section and the pin section becomes gradually shallower in the direction from the feeding section to the metering section.

Furthermore, the length-diameter ratio of the screw body is 32-35, and the compression ratio is 2-3.

Furthermore, 3 groups of pins are uniformly distributed between every two adjacent spiral edges on the outer wall of the pin section, and 3 pins are uniformly distributed in each group of pins in an inclined mode.

The utility model has the advantages that: according to the characteristics of the used raw materials and the actual requirements of products, the screw adopts a hard alloy steel screw, the surface of the screw adopts a heat treatment process, the whole screw is plated with hard chromium, and double alloys are spray-welded on the tops of screw threads, so that the whole hardness of the screw is improved, and the wear resistance and corrosion resistance are improved; through the increase compression ratio, deepen the kerve, set up the pin and set up the multiunit slot at the separation head in the measurement section, change the mobility of material, solved the TPU material when producing ultra-thin wall thickness, the shaping degree of difficulty is big, and the technical bottleneck that the shaping precision is difficult to control guarantees raw materials plastify effect, guarantees the high transparency of goods, high gloss.

Drawings

FIG. 1 is a schematic view of the overall structure of a high-transparency high-fluidity thin-walled extrusion screw;

FIG. 2 is a cross-sectional view of shank B-B of the high clarity, high flow, thin wall extrusion screw;

FIG. 3 is an enlarged schematic view of the flight of a high clarity, high flow, thin wall extrusion screw;

FIG. 4 is an expanded and enlarged schematic view of a pin segment of a high-transparency high-fluidity thin-walled extrusion screw;

FIG. 5 is a cross-sectional view of a groove C-C of a high clarity, high flow, thin walled extrusion screw;

in the figure: 1. the screw comprises a screw body 2, a handle 21, a clamping groove 3, a threaded connection section 4, a feeding section 41, a feeding port 5, a compression section 6, a metering section 61, a pin section 611, a pin 7, a separation head 71, a groove 8 and a screw ridge.

Detailed Description

The utility model is further described with reference to the following figures and examples.

A high-transparency high-fluidity thin-wall extrusion screw comprises a screw body 1, a rod handle 2, a clamping groove 21, a threaded connection section 3, a feeding section 4, a feeding hole 41, a compression section 5, a metering section 6, a pin section 61, a pin 611, a separation head 7, a groove 71 and a screw ridge 8, the screw body 1 is sequentially provided with a rod handle 2, a threaded connection section 3, a feeding section 4, a compression section 5, a metering section 6 and a separation head 7, a clamping groove 21 is arranged in the outer wall of the tail end of the rod handle 2, the feeding section 4, the compression section 5 and the metering section 6 are provided with screw ridges 8, screw rod component parts are formed, the screw pitch of the screw ridges 8 is W, the height of the screw ridges is H, the width of the screw ridges is L, the metering section 6 is provided with a pin section 61, a pin 611 is arranged on the pin section 61, the front end of the metering section 6 is provided with a separation head 7, and the outer wall of the separation head 7 is obliquely and uniformly provided with a plurality of groups of grooves 71.

Further, the screw body 1 is made of hard alloy steel; the screw body 1 is subjected to quenching and tempering treatment, and the hardness is adjusted to 250- & ltSUB & gt 280- & gt; the screw body 1 is integrally plated with hard chromium, the hardness is over 900HV, and the thickness of a plating layer is 0.06 mm-0.1 mm.

Furthermore, the 8-crest spray welding double alloy of the screw edge has the single-side thickness of 0.8-1.0mm and the hardness of HRC 58-62.

Further, the screw body 1 is of an equidistant and unequal-depth screw structure.

Further, the feeding section 4 is a long outer diameter tolerance gradual change section and is of an equidistant equal-depth screw structure.

Further, the compression section 5 and the metering section 6 are of equidistant and gradually deformed screw structures; the depth of the screw grooves on the compression section 5 and the pin section 61 becomes gradually shallower in the direction from the feed section 4 to the metering section 6.

Furthermore, the length-diameter ratio of the screw body 1 is 32-35, and the compression ratio is 2-3.

Furthermore, 3 groups of pins 611 are uniformly distributed between every two adjacent spiral ridges 8 on the outer wall of the

pin section

61, and 3 pins 611 are uniformly distributed in each group of pins 611 in an inclined manner.

The using method comprises the following steps: after the screw body 1 is installed, adjusting the processing temperature of the machine to be close to the ideal processing temperature range of the processed material, and starting the machine when the screw body 1 reaches the preset temperature; the screw body 1 rotates in the machine barrel, materials enter the feeding section 4 from the feeding hole 41, and the materials are pushed to move forwards in the feeding section 4 by the rotation of the screw body 1; then the material enters a compression section 5, in which the material particles are gradually melted, the volume of the screw groove is gradually reduced to correspond to the reduction of the geometric volume of the material, the material is compacted and mixed, and the material passing through the compression section 5 is almost completely dissolved but is not necessarily uniformly mixed; then, the molten material enters the pin section 61, the cylindrical pins 611 are arranged on the metering section 6 according to a certain arrangement mode, the material flow is divided, the interface is increased, the material flow direction is changed, the material flow is rearranged, the material flow is divided and converged for multiple times, the flow direction is changed, the components of the melt and the temperature are homogenized, and the complete melting and uniform temperature of the material are ensured, and the uniform mixing is realized; and finally, the material enters the separation head 7, is divided and converged for multiple times through the multiple groups of grooves 71, is more fully mixed, and is finally extruded and molded through a screw head on the separation head 7.

Claims

1. High transparent high mobility thin wall extrusion screw, including screw body (1), pole handle (2), draw-in groove (21), threaded connection section (3), feeding section (4), feed inlet (41), compression section (5), measurement section (6), pin section (61), pin (611), separation head (7), slot (71) and spiral shell arris (8), characterized by: be equipped with pole handle (2), threaded connection section (3), feeding section (4), compression section (5), measurement section (6) and separation head (7) on screw rod body (1) in proper order, be equipped with draw-in groove (21) in pole handle (2) tail end outer wall, be equipped with feed inlet (41) on feeding section (4), be equipped with spiral shell arris (8) on feeding section (4), compression section (5) and measurement section (6), be equipped with pin section (61) on measurement section (6), be equipped with pin (611) on pin section (61), measurement section (6) front end is equipped with separation head (7), the slant equipartition has multiunit slot (71) on the outer wall of separation head (7).

2. The high-transparency high-fluidity thin-walled extrusion screw according to claim 1, which is characterized in that: the screw body (1) is made of hard alloy steel material; the screw body (1) is subjected to quenching and tempering treatment to adjust the hardness to 250-; the screw body (1) is integrally plated with hard chromium, the hardness is over 900HV, and the thickness of a plating layer is 0.06 mm-0.1 mm.

3. The high-transparency high-fluidity thin-walled extrusion screw according to claim 1, which is characterized in that: the crest of the screw ridge (8) is spray-welded with double alloy, the thickness of a single surface is 0.8-1.0mm, and the hardness is HRC 58-62.

4. The high-transparency high-fluidity thin-walled extrusion screw according to claim 1, which is characterized in that: the screw body (1) is of an equidistant and unequal-depth screw structure.

5. The high-transparency high-fluidity thin-walled extrusion screw according to claim 1, which is characterized in that: the feeding section (4) is a long outer diameter tolerance transition section and is of an equidistant equal-depth screw structure.

6. The high-transparency high-fluidity thin-walled extrusion screw according to claim 1, which is characterized in that: the compression section (5) and the metering section (6) are of equidistant and gradually deformed screw structures; the depth of the screw grooves on the compression section (5) and the pin section (61) becomes gradually shallower from the feeding section (4) to the metering section (6).

7. The high-transparency high-fluidity thin-walled extrusion screw according to claim 1, which is characterized in that: the length-diameter ratio of the screw body (1) is 32-35, and the compression ratio is 2-3.

8. The high-transparency high-fluidity thin-walled extrusion screw according to claim 1, which is characterized in that: every two adjacent spiral arriss (8) on the outer wall of pin section (61) are the equipartition and are had 3 groups of pin (611), and 3 pins (611) have the slant equipartition in every group pin (611).