CN211441106U

CN211441106U - Extrusion screw for waste rubber regeneration

Info

Publication number: CN211441106U
Application number: CN201921248792.9U
Authority: CN
Inventors: 袁能军; 张文侠; 袁安军; 袁栋斌; 袁富军; 袁武光
Original assignee: Zhejiang Dongbin Rubber Screw Co ltd
Current assignee: Zhejiang Dongbin Rubber Screw Co ltd
Priority date: 2019-08-03
Filing date: 2019-08-03
Publication date: 2020-09-08
Anticipated expiration: 2029-08-03

Abstract

The utility model provides an extrude screw rod for waste rubber regeneration, includes the body of rod and spiral arris, and the spiral arris divide into the feed zone, melting section, mixing section and ejection of compact section, and melting section includes that melting one section is one section, and melting two-stage process, melting three-section and melting four-section, melting one section comprises a N cam that sets up along the body of rod axial, and the direction of rotation that the top line of N cam is helix and helix is the same with the feed zone soon, and the melting two-stage process overlooks that the projection is the spiral arris arch of type of falling V, and the protruding evenly distributed of spiral arris is on the outer circumference of the body of rod that melting two-stage process corresponds, and the melting three-section is the same single spiral arris with the feed zone soon, and the melting four-section is the four-turn spiral arris, and four spiral arris evenly distributed of four-turn on the outer peripheral face of the body of rod that: the screw edges are changed more, and the extrusion force which is changed continuously can be applied in the flowing process of the waste rubber, so that the melting reprocessing of the waste rubber is realized.

Description

Extrusion screw for waste rubber regeneration

Technical Field

The utility model relates to a screw rod preparation field especially indicates a screw rod of extruding for waste rubber regeneration.

Background

The current application number is CN201821047393.1 name "two sections spiral shell arris exhaust screw"'s chinese utility model patent discloses a two sections spiral shell arris exhaust screw, including first-order screw rod and second order screw rod, first-order screw rod is equipped with feed section, compression section, the second order screw rod is equipped with decompression exhaust section, measurement section, the second order screw rod is equipped with a spiral shell arris and No. two spiral shell arriss, the pitch of a spiral shell arris and No. two spiral shell arriss is the same, the screw thread turns to the same and crisscross each other. The utility model discloses a decompression exhaust section, measurement section adopt two sections screw arriss, play the effect of reposition of redundant personnel to the melting raw materials that comes from the compression section, improve the space utilization of decompression exhaust section and measurement section, reduce piling up, being detained of melting raw materials between compression section and decompression exhaust section. However, the screw has less variation of screw flight, and the melting effect of the material is still not ideal, so the structure of the screw needs to be further improved.

Disclosure of Invention

The utility model aims to solve the technical problem that thereby it increases crowded tangential force to provide one kind and can change the rotation flow direction of rubber waste at the melting section to above-mentioned prior art current situation, effectively melts the rubber waste and extrudes the screw rod that is used for rubber waste regeneration of processing.

The utility model provides a technical scheme that above-mentioned technical problem adopted does: this an extrude screw rod for scrap rubber regeneration, including the body of rod and the spiral shell arris of setting on the body of rod, the spiral shell arris divide into the feeding section, and melting section, mixing section and ejection of compact section, its characterized in that: the melting section comprises a melting section, a melting section and a melting section, wherein the melting section is composed of N cams arranged along the axial direction of a rod body, the top end connecting line of the N cams is a spiral line, the rotating direction of the spiral line is the same as the rotating direction of the feeding section, the melting section is a spiral edge bulge with an inverted V-shaped overlooking projection, the spiral edge bulge is uniformly distributed on the outer circumference of the rod body corresponding to the melting section, the melting section is a single-rotation spiral edge with the same rotating direction as the feeding section, the melting section is a four-rotation spiral edge, four spiral edges of the four-rotation spiral edge are uniformly distributed on the outer circumference of the rod body corresponding to the melting section, the four-rotation spiral edges are the same as the rotating direction of the feeding section, and N is a natural number larger than 4.

The improvement is that the mixing section comprises a mixing section, a mixing section and a mixing section, wherein the mixing section is a mixing screw rib with the same structure as the melting section, the mixing section is a second mixing screw rib with the same screw pitch as the single-screw rib, the mixing section is a third mixing screw rib with the same structure as the melting section, and the mixing section is a fourth mixing screw rib with the same structure as the melting section.

As an improvement, the pitch of the spiral line formed by the N cams is preferably 3-6 times that of the single-spiral ribs, the pitch of each of the four-spiral ribs is the same, and the pitch of the four-spiral ribs is 3-6 times that of the single-spiral ribs.

As an improvement, the screw ridge protrusion may preferably consist of a front section protrusion and a rear section protrusion, the rear section protrusion is of a spiral structure with the same pitch as that of the four-screw ridge, the front section protrusion and the rear section protrusion are opposite in direction, and the tail end of the front section protrusion and the head end of the rear section protrusion are connected together in a smooth transition manner.

In a further improvement, the number of the spiral ridge protrusions is preferably four, the length of each spiral ridge protrusion is the same, and the length is 190-206 mm.

As an improvement, the discharging section comprises a first discharging section, a second discharging section and a third discharging section, the first discharging section and the third discharging section are single screw ridges with the same screw pitch, the second discharging section is composed of 3-6 lug groups axially arranged along the rod body, each lug group is composed of 3-5 lugs axially arranged along the rod body, and an included angle between adjacent lugs in each lug group is gradually increased.

In a further improvement, the ratio of the included angles between adjacent bumps in any bump group may preferably conform to the fibonacci series, and when the number of bumps is 3, the ratio of the included angles is 3:5, when the number of bumps is 4, the ratio of the included angles is 2:3:5, and when the number of bumps is 5, the ratio of the included angles is 2:3:5: 8.

The further improvement is that the length ratio of the first discharging section to the second discharging section can be preferably 4:3:3, the thread pitch of the single spiral rib is 22-32 mm, the thickness of each bump is the same, and the thickness of each bump is 11-14 mm.

As an improvement, the feeding section comprises a feeding section, a feeding section and a feeding section, the feeding section and the feeding section are unidirectional screw edges with the same screw pitch, the feeding section comprises four screw edge sections which are axially arranged along the rod body, the rotation direction of the four screw edge sections is the same as that of the unidirectional screw edges, each four screw edge section comprises four screw edges which are uniformly distributed on the outer circumference of the rod body, the screw pitches of the four screw edges are the same, and the screw pitches of the four screw edges are 3-6 times of those of the unidirectional screw edges; the length ratio of the first feeding section, the second feeding section and the third feeding section is 5:4:1, the screw pitch of the unidirectional screw rib is 22-32 mm, and the screw pitch of the four screw rib section is 97-107 mm.

As an improvement, a 3-5 mm nitriding layer can be preferably arranged on the outer surface of the screw corresponding to the feeding section, the melting section, the mixing section and the discharging section.

Compared with the prior art, the utility model has the advantages of: the screw rib has large extrusion cutting force and can continuously apply extrusion force in the flowing process of the waste rubber so as to melt the waste rubber, the melted waste rubber leaves the extrusion screw from the discharge section and is molded again through the die, the recycling of the waste rubber is realized, and the problem that the waste rubber is difficult to treat in the prior art is solved, which cannot be done in the prior art, and an applicant designs the screw structure through numerous tests and summarization; wherein, the melting section is composed of four different sections of screw ridges, the melting section adopts a cam arranged along the axial direction of a rod body, the waste rubber can always receive sudden extrusion force in the process of flowing from one cam to the other cam, so that the waste rubber can rapidly enter the melting state, the rotating direction of the top end connecting line of the cam is the same as the rotating direction of the feeding section, the waste rubber blockage is avoided, the waste rubber is ensured to smoothly pass through the melting section, the melting section adopts a screw ridge bulge with an inverted V-shaped overlooking projection, the forward thrust of the bulge at the rear section and the backward thrust of the bulge at the front section simultaneously extrude the waste rubber, the pressure of the waste rubber is further increased at the position, the waste rubber enters the melting section for continuous heating, the pressure of the melting section is smaller relative to the melting section at the three sections, so that the waste rubber in the melting state is subjected to the changing pressure again, the waste rubber can, the four melting sections are four-spiral screw edges, so that the flow velocity of the melted waste rubber can be further accelerated, the feeding smoothness is kept, and the melted waste rubber can rapidly enter the mixing section for mixing operation, so that the uniformity of the waste rubber is improved, and the quality of the waste rubber is improved; the mixing section is also divided into four sections, and the waste rubber passing through the section becomes more uniform and compact through reasonable structural design; finally, the waste rubber leaves the extrusion screw through a discharge section; the discharge section is provided with a lug section between the single screw ridges, and the ratio of the included angles between the adjacent lugs can ensure that the pressure borne by the waste rubber is periodically and slowly changed, so that the waste rubber is further homogenized and can smoothly leave the screw.

Drawings

Fig. 1 is a perspective view of an embodiment of the present invention;

FIG. 2 is a front perspective view of FIG. 1;

FIG. 3 is a cross-sectional view taken along line A-A of FIG. 2;

FIG. 4 is a cross-sectional view taken along line B-B of FIG. 2;

fig. 5 is an enlarged view of a portion I in fig. 4.

Detailed Description

The present invention will be described in further detail with reference to the following embodiments.

As shown in fig. 1 to 5, the extrusion screw for recycling waste rubber of this embodiment includes a rod body 1 and screw ridges disposed on the rod body 1, the screw ridges are divided into a feeding section a, a melting section B, a mixing section C and a discharging section D, the melting section B includes a melting section B1, a melting section B2, a melting section B3 and a melting section B4, the melting section B1 is composed of N cams 21 disposed along the axial direction of the rod body, a top end connecting line of the N cams 21 is a spiral line, a rotation direction of the spiral line is the same as that of the feeding section a, the melting section B2 is a screw ridge protrusion 22 having an inverted V-shaped top view projection, the screw ridge protrusion 22 is uniformly distributed on an outer circumference of the rod body corresponding to the melting section B2, the melting section B3 is a single-rotation screw ridge 23 having the same rotation direction as that of the feeding section a, the melting section B4 is a four-rotation screw ridge 24, and the screw ridges of the four screw ridges 24 are uniformly distributed on an outer circumference of the melting section B4 corresponding to the melting section B4, and the direction of the four-turn screw edge 24 is the same as that of the feeding section A, and N is a natural number more than 4. The mixing section C comprises a mixing section C1, a mixing section C2, a mixing section C3 and a mixing section C4, wherein the mixing section C1 is a mixing screw rib 31 with the same structure as that of the melting section B4, the mixing section C2 is a second mixing screw rib 32 with the same screw pitch as that of the single-screw rib 23, the mixing section C3 is a third mixing screw rib 33 with the same structure as that of the melting section B1, and the mixing section C4 is a fourth mixing screw rib 34 with the same structure as that of the melting section B2. The pitch of a spiral line formed by the N cams 21 is 3-6 times that of the single-spiral ribs 23, the pitch of each of the four-spiral ribs 24 is the same, and the pitch of the four-spiral ribs 24 is 3-6 times that of the single-spiral ribs 23. The screw ridge protrusion 22 is composed of a front section protrusion and a rear section protrusion, the rear section protrusion is of a spiral structure with the same screw pitch as the four-screw ridge 24, the direction of the front section protrusion is opposite to that of the rear section protrusion, and the tail end of the front section protrusion and the head end of the rear section protrusion are connected together in a smooth transition mode. The number of the spiral ridge protrusions 22 is four, the length L of each spiral ridge protrusion 22 is the same, and the length L is 190-206 mm.

The ejection of compact section D is including one section D1 of ejection of compact, two sections D2 of ejection of compact and ejection of compact three-section D3, one section D1 of ejection of compact and the same single spiral shell arris 41 of ejection of compact three-section D3 are the screw pitch, two sections D2 of ejection of compact are constituteed by 3 ~ 6 lug groups along body of rod axial setting, and every lug group comprises 3 ~ 5 lugs 42 along body of rod axial setting respectively, and the contained angle between the adjacent lug 42 increases gradually in every lug group. The ratio of the included angles between adjacent bumps 42 in any bump group conforms to the fibonacci series, and is 3:5 when the number of bumps 42 is 3, 2:3:5 when the number of bumps 42 is 4, and 2:3:5:8 when the number of bumps 42 is 5. The length ratio of the discharging first section D1 to the discharging second section D2 to the discharging third section D3 is 4:3:3, the thread pitch of the single spiral rib 41 is 22-32 mm, the thickness of each bump 42 is the same, and the thickness of each bump 42 is 11-14 mm.

The feeding section A comprises a feeding section A1, a feeding section A2 and a feeding section A3, the feeding section A1 and the feeding section A3 are unidirectional screw ribs 11 with the same screw pitch, the feeding section D2 is composed of 1-3 four-screw rib sections 12 arranged along the axial direction of the rod body, the rotation direction of the four-screw rib sections 12 is the same as that of the unidirectional screw ribs 11, each four-screw rib section 12 comprises four screw ribs uniformly distributed on the outer circumference of the rod body, the screw pitches of the four screw ribs are the same, and the screw pitches of the four screw ribs are 3-6 times of those of the unidirectional screw ribs 11; the length ratio of the feeding first section A1 to the feeding second section A2 to the feeding third section A3 is 5:4:1, the screw pitch of the unidirectional screw rib 11 is 22-32 mm, and the screw pitch of the four screw rib section 12 is 97-107 mm. And 3-5 mm of nitride layers 10 are arranged on the outer surfaces of the screws corresponding to the feeding section A, the melting section B, the mixing section C and the discharging section D.

Claims

1. The utility model provides an extrude screw rod for waste rubber regeneration, includes the body of rod (1) and sets up the spiral shell arris on the body of rod (1), the spiral shell arris divide into feeding section (A), melting section (B), mixing section (C) and ejection of compact section (D), its characterized in that: the melting section (B) comprises a melting section (B1), a melting section (B2), a melting section (B3) and a melting section (B4), the melting section (B1) consists of N cams (21) arranged along the axial direction of a rod body, the top end connecting line of the N cams (21) is a spiral line, the rotating direction of the spiral line is the same as the rotating direction of the feeding section (A), the melting section (B2) is a spiral ridge bulge (22) with an inverted V-shaped overlooking projection, the spiral ridge bulge (22) is uniformly distributed on the outer circumference of the rod body corresponding to the melting section (B2), the melting section (B3) is a single-rotation spiral ridge (23) with the same rotating direction as the feeding section (A), the melting section (B4) is a four-rotation ridge (24), four ridges of the four-rotation ridge (24) are uniformly distributed on the outer circumference of the rod body corresponding to the melting section (B4), and the four ridges (24) and the feeding section (A) and the rotating direction is the same as the feeding section (A), n is a natural number greater than 4; the spiral ridge bulge (22) is composed of a front section bulge and a rear section bulge, the rear section bulge is of a spiral structure with the same pitch as the four-turn spiral ridge (24), the direction of the front section bulge is opposite to that of the rear section bulge, and the tail end of the front section bulge is connected with the head end of the rear section bulge in a smooth transition mode.

2. The extrusion screw of claim 1, wherein: the mixing section (C) comprises a mixing section (C1), a mixing section (C2), a mixing section (C3) and a mixing section (C4), wherein the mixing section (C1) is a mixing screw rib (31) with the same structure as that of the melting section (B4), the mixing section (C2) is a second mixing screw rib (32) with the same screw pitch as that of the single-screw rib (23), the mixing section (C3) is a third mixing screw rib (33) with the same structure as that of the melting section (B1), and the mixing section (C4) is a fourth mixing screw rib (34) with the same structure as that of the melting section (B2).

3. The extrusion screw of claim 1, wherein: the pitch of a spiral line formed by the N cams (21) is 3-6 times that of a single-spiral rib (23), the pitch of each of four-spiral ribs (24) is the same, and the pitch of each of the four-spiral ribs (24) is 3-6 times that of the single-spiral rib (23).

4. The extrusion screw of claim 1, wherein: the number of the spiral ridge protrusions (22) is four, the length (L) of each spiral ridge protrusion (22) is the same, and the length (L) is 190-206 mm.

5. An extrusion screw according to any one of claims 1 to 4, wherein: go out material section (D) including one section of ejection of compact (D1), ejection of compact two-stage section (D2) and ejection of compact three-stage (D3), one section of ejection of compact (D1) is the same single spiral arris (41) of pitch with ejection of compact three-stage section (D3), ejection of compact two-stage section (D2) comprises 3 ~ 6 lug groups along body of rod axial setting, and every lug group comprises 3 ~ 5 lug (42) along body of rod axial setting respectively, and the contained angle between adjacent lug (42) increases gradually in every lug group.

6. The extrusion screw of claim 5, wherein: the ratio of the included angles between adjacent bumps (42) in any bump group conforms to the Fibonacci series, and is 3:5 when the number of bumps (42) is 3, 2:3:5 when the number of bumps (42) is 4, and 2:3:5:8 when the number of bumps (42) is 5.

7. The extrusion screw of claim 6, wherein: the discharging first section (D1), the length ratio of the discharging second section (D2) to the discharging third section (D3) is 4:3:3, the thread pitch of the single spiral rib (41) is 22-32 mm, the thickness of each bump (42) is the same, and the thickness of each bump (42) is 11-14 mm.

8. An extrusion screw according to any one of claims 1 to 4, wherein: the feeding section (A) comprises a feeding section (A1), a feeding section (A2) and a feeding section (A3), the feeding section (A1) and the feeding section (A3) are unidirectional screw ribs (11) with the same screw pitch, the feeding section (D2) is composed of 1-3 four screw rib sections (12) which are arranged along the axial direction of the rod body, the rotating direction of the four screw rib sections (12) is the same as that of the unidirectional screw ribs (11), each four screw rib section (12) comprises four screw ribs which are uniformly distributed on the outer circumference of the rod body, the screw pitches of the four screw ribs are the same, and the screw pitches of the four screw ribs are 3-6 times of those of the unidirectional screw ribs (11); the length ratio of the first feeding section (A1), the second feeding section (A2) and the third feeding section (A3) is 5:4:1, the pitch of the unidirectional spiral rib (11) is 22-32 mm, and the pitch of the four spiral rib section (12) is 97-107 mm.

9. An extrusion screw according to any one of claims 1 to 4, wherein: and 3-5 mm of nitride layers (10) are arranged on the outer surfaces of the screws corresponding to the feeding section (A), the melting section (B), the mixing section (C) and the discharging section (D).