CN221022270U - Extrusion screw - Google Patents

Abstract

The utility model provides an extrusion screw, includes the body of rod and sets up the spiral shell arris on the body of rod, the external diameter of spiral shell arris is greater than or equal to 300mm, the spiral shell arris includes feeding section, melting first section, changeover portion, melting second section, ejection of compact section, melting first section and melting second section all are formed along the helix by the spiral shell arris that the multistage is independent respectively ranging, are provided with the breach between melting first section and the changeover portion, also are provided with the breach between changeover portion and the melting second section. The utility model has the advantages that: a large amount of materials can be transported at one time, the material conveying efficiency is high, and the material extrusion amount is large; because the extrusion amount of the material is large, the first melting section and the second melting section adopt a structure formed by arranging a plurality of sections of respectively independent screw edges along the spiral line, so that the cross wrapping and up-down mixing of the material are increased when the material passes through the first melting section and the second melting section, the uniformity between the upper layer and the lower layer of the material is improved, the material is better and more fully enters the molten state, and the mixing effect of the screw is improved.

Description

Extrusion screw

Technical Field

The utility model relates to the technical field of screw rod manufacturing, in particular to an extrusion screw rod.

Background

The prior Chinese patent application with the application number of CN201920110265.5 called extrusion screw discloses an extrusion screw, which solves the problem that the mixing of the combined foaming agent entering an extruder is uneven. The method is characterized in that: comprises screw edges, wherein the screw edges are provided with notches. The combined foaming agent is conveyed into the screw extruder and is mixed with the molten material on the screw edges, and in the forward moving process of the screw edges conveying mixed materials, part of mixed materials can flow back into the rear screw edges from the front screw edges through the gaps, so that the mixed materials are repeatedly mixed, the mixed materials are uniformly mixed, and the quality of foaming materials is ensured. However, the screw has only two notches and is arranged at one position, which is unfavorable for the extrusion operation of large-capacity materials, so that the structure of the screw needs to be further improved.

Disclosure of Invention

The utility model aims to solve the technical problem of providing an extrusion screw with large extrusion quantity and good material mixing effect aiming at the current state of the art.

The technical scheme adopted for solving the technical problems is as follows: this extrusion screw, including the body of rod and the spiral shell arris of setting on the body of rod, its characterized in that: the outer diameter of the screw edges is kept to be the same, the outer diameter of the screw edges is 298-302mm, the screw edges comprise a feeding section, a first melting section, a transition section, a second melting section and a discharging section, the first melting section and the second melting section are respectively formed by arranging a plurality of sections of screw edges which are respectively independent along a spiral line, a notch is arranged between the first melting section and the transition section, and a notch is also arranged between the transition section and the second melting section.

As a modification, the molten segment may preferably include a first screw flight, a second screw flight, a third screw flight, a fourth screw flight, and a fifth screw flight, wherein the axial projections of the first screw flight, the second screw flight, the third screw flight, the fourth screw flight, and the fifth screw flight are all exactly one turn, and the outer diameter of the screw flight is # -300 mm.

In a further development, the second melting section may preferably comprise a sixth screw flight, a seventh screw flight, an eighth screw flight, and a ninth screw flight, the axial projections of the sixth screw flight, the seventh screw flight, the eighth screw flight, and the ninth screw flight being exactly one revolution.

Further improved, the gap between the first screw edge, the second screw edge, the third screw edge, the fourth screw edge and the fifth screw edge, the gap between the sixth screw edge, the seventh screw edge, the eighth screw edge and the ninth screw edge, the gap between the melting section and the transition section can be preferably flat gaps with the tangential plane parallel to the radial plane direction of the screw.

As an improvement, the rod body may preferably be provided with a positioning slot in the axial direction.

As an improvement, a flow blocking section can be preferably provided on the outer wall of the shaft body adjacent to the feed section.

Further, the flow blocking section can be divided into a first flow blocking section and a second flow blocking section, and an annular groove is formed in the surface of the rod body between the first flow blocking section and the second flow blocking section.

As an improvement, the rod body of the feeding section may preferably have a gradually decreasing diameter, and the diameter of the rod body at the position where the diameter of the rod body corresponding to the feeding section is the same as the diameter of the rod body corresponding to the melting section.

Further improvements may be obtained in that the feed section is preferably a single flight, with auxiliary flights provided at the initial position of the feed section.

As an improvement, the discharge section may preferably be a single screw flight, the screw flight pitch of the discharge section being identical to the screw flight pitch of the melting section and the screw flight pitch of the melting section.

Compared with the prior art, the utility model has the advantages that: the external diameter of the screw edges is more than or equal to 300mm, so that a large amount of materials can be transported at one time, the material conveying efficiency is high, and the material extrusion amount is large; because the extrusion amount of the materials is large, the first melting section and the second melting section adopt a structure formed by arranging a plurality of sections of independent screw edges along the spiral line, so that when the materials pass through the first melting section and the second melting section, the cross wrapping and up-down mixing of the materials are increased, the uniformity between the upper layer and the lower layer of the materials is improved, the materials enter the molten state better and more fully, and the mixing effect of the screw is improved; a gap is arranged between the first melting section and the transition section, and a gap is also arranged between the transition section and the second melting section, so that the continuous screw rib processing can be facilitated, and the processing difficulty is reduced.

Drawings

Fig. 1 is a front perspective view of an embodiment of the present utility model.

Detailed Description

The utility model is described in further detail below with reference to the embodiments of the drawings.

As shown in FIG. 1, the extrusion screw of this embodiment comprises a rod body 1 and screw edges arranged on the rod body 1, wherein the outer diameters of the screw edges are kept to be the same in size, the outer diameters of the screw edges are phi 298-302mm, and can be preferably phi 300mm, the screw edges comprise a feeding section A, a melting section B, a transition section C, a melting section D and a discharging section E, the melting section B and the melting section D are respectively formed by arranging a plurality of sections of screw edges which are respectively independent along a spiral line, a gap is arranged between the melting section B and the transition section C, and a gap is also arranged between the transition section C and the melting section D.

The melting section B comprises a first screw thread 11, a second screw thread 12, a third screw thread 13, a fourth screw thread 14 and a fifth screw thread 15, and the axial projections of the first screw thread 11, the second screw thread 12, the third screw thread 13, the fourth screw thread 14 and the fifth screw thread 15 are just one circle. The melting second section D comprises a sixth screw thread 16, a seventh screw thread 17, an eighth screw thread 18 and a ninth screw thread 19, and the axial projections of the sixth screw thread 16, the seventh screw thread 17, the eighth screw thread 18 and the ninth screw thread 19 are just one circle. The gap between the first screw flight 11, the second screw flight 12, the third screw flight 13, the fourth screw flight 14 and the fifth screw flight 15, the gap between the sixth screw flight 16, the seventh screw flight 17, the eighth screw flight 18 and the ninth screw flight 19, the gap between the melting section B and the transition section C, and the gap between the transition section C and the melting section D are straight gaps with the tangential plane parallel to the direction of the screw diameter surface.

The rod body is axially provided with a positioning slot 110. A flow blocking section is arranged on the outer wall of the rod body close to the feeding section A. The flow blocking section is divided into a first flow blocking section 111 and a second flow blocking section 113, and an annular groove 112 is arranged on the surface of the rod body between the first flow blocking section 111 and the second flow blocking section 113. The first baffle section 111 and the second baffle section 113 are both helical grooves.

The diameter of the rod body of the feeding section A is gradually reduced, and the diameter of the rod body at the position with the minimum diameter of the rod body corresponding to the feeding section A is the same as the diameter of the rod body corresponding to the melting section B. The feeding section A is a single screw flight, and an auxiliary screw flight 114 is arranged at the initial position of the feeding section A. The discharge section E is a single screw rib, and the screw rib distance of the discharge section E is the same as the screw rib distance of the second melting section D and the screw rib distance of the first melting section B.

Claims (10)

1. The utility model provides an extrusion screw, includes body of rod (1) and sets up the spiral shell arris on body of rod (1), its characterized in that: the outer diameter of the screw edge keeps the same size, the outer diameter of the screw edge is 298-302mm, the screw edge comprises a feeding section (A), a first melting section (B), a transition section (C), a second melting section (D) and a discharging section (E), the first melting section (B) and the second melting section (D) are respectively formed by arranging screw edges which are respectively independent from each other in multiple sections along a spiral line, a gap is arranged between the first melting section (B) and the transition section (C), and a gap is also arranged between the transition section (C) and the second melting section (D).

2. The extrusion screw of claim 1, wherein: the melting section (B) comprises a first screw thread (11), a second screw thread (12), a third screw thread (13), a fourth screw thread (14) and a fifth screw thread (15), the axial projections of the first screw thread (11), the second screw thread (12), the third screw thread (13), the fourth screw thread (14) and the fifth screw thread (15) are just one circle, and the outer diameter of the screw thread is phi 300mm.

3. The extrusion screw of claim 2, wherein: the melting second section (D) comprises a sixth screw thread (16), a seventh screw thread (17), an eighth screw thread (18) and a ninth screw thread (19), and the axial projections of the sixth screw thread (16), the seventh screw thread (17), the eighth screw thread (18) and the ninth screw thread (19) are just one circle.

4. An extrusion screw according to claim 3 wherein: the screw comprises a first screw rib (11), a second screw rib (12), a third screw rib (13), a fourth screw rib (14) and a fifth screw rib (15), a sixth screw rib (16), a seventh screw rib (17), an eighth screw rib (18) and a ninth screw rib (19), and a transition section (C) and a transition section (B), wherein the transition section (C) and the transition section (D) are straight gaps with the tangential surfaces parallel to the direction of the diameter surfaces of the screws.

5. The extrusion screw according to any one of claims 1 to 4 wherein: the rod body is axially provided with a positioning slot hole (110).

6. The extrusion screw according to any one of claims 1 to 4 wherein: a flow blocking section is arranged on the outer wall of the rod body close to the feeding section (A).

7. The extrusion screw of claim 6, wherein: the flow blocking section is divided into a first flow blocking section (111) and a second flow blocking section (113), and an annular groove (112) is formed in the surface of the rod body between the first flow blocking section (111) and the second flow blocking section (113).

8. The extrusion screw according to any one of claims 1 to 4 wherein: the diameter of the rod body of the feeding section (A) is gradually reduced, and the diameter of the rod body at the position with the minimum diameter of the rod body corresponding to the feeding section (A) is the same as the diameter of the rod body corresponding to the melting section (B).

9. The extrusion screw of claim 8, wherein: the feeding section (A) is a single screw thread, and an auxiliary screw thread (114) is arranged at the initial position of the feeding section (A).

10. The extrusion screw according to any one of claims 1 to 4 wherein: the discharge section (E) is a single screw rib, and the screw rib distance of the discharge section (E) is the same as the screw rib distance of the melting second section (D) and the screw rib distance of the melting first section (B).