CN218803901U

CN218803901U - Screw structure of supercritical micro-foaming extrusion device

Info

Publication number: CN218803901U
Application number: CN202220481779.3U
Authority: CN
Inventors: 窦信胜
Original assignee: Ningbo Zhongbai Environmental Protection Technology Co ltd
Current assignee: Ningbo Zhongbai Environmental Protection Technology Co ltd
Priority date: 2022-02-27
Filing date: 2022-02-27
Publication date: 2023-04-07
Anticipated expiration: 2032-02-27

Abstract

The utility model discloses a supercritical microfoaming extrusion device's screw rod structure, including the screw rod body, the end of body is equipped with first spiral portion, the outside at body middle part is equipped with a plurality of second spiral portions the same with first spiral portion direction of spiral, the outside interval of body is equipped with a plurality of third spiral portions opposite with second spiral portion direction of spiral, the outside of second spiral portion is equipped with a plurality of breachs. The utility model discloses a set up the screw rod body, it is higher to possess screw rod intensity, uses difficult fracture for a long time, can carry out certain pressure balance's advantage, and the screw rod structural strength who has solved current supercritical microfoaming extrusion device is lower, because the screw rod needs long-time continuous work, uses under high-pressure environment moreover, easy cracked problem after long-time use.

Description

Screw structure of supercritical micro-foaming extrusion device

Technical Field

The utility model belongs to the technical field of the supercritical microfoaming, especially, relate to a supercritical microfoaming extrusion device's screw rod structure.

Background

At a specific temperature and pressure, a situation that liquid and gas boundaries disappear occurs in a substance, the point is a critical point, if the substance with the temperature and the pressure exceeding the critical point is a supercritical fluid, the supercritical fluid can be any substance with the temperature and the pressure exceeding the critical point, the substance simultaneously shows the characteristics of gas and liquid in the supercritical state, the supercritical fluid is also called dense gas or high-pressure gas, has the dual characteristics of liquid and gas, the viscosity and the diffusion coefficient of the supercritical fluid are closer to the gas, the density and the solvation capacity of the supercritical fluid are closer to the liquid, and the micro-foaming technology is increasingly applied to production and life.

The micro-foaming of the polymer needs to be realized by an extrusion device, and the screw structure is a core component of the supercritical micro-foaming extrusion device, and the problems in the prior art are that: the screw structure intensity of the existing supercritical microfoaming extrusion device is low, and the screw needs to continuously work for a long time and is easy to break after being used for a long time when being applied to a high-pressure environment.

SUMMERY OF THE UTILITY MODEL

Problem to prior art exists, the utility model provides a supercritical microfoaming extrusion device's screw rod structure possesses screw rod intensity higher, uses difficult fracture for a long time, can carry out certain pressure balance's advantage, and the screw rod structural strength who has solved current supercritical microfoaming extrusion device is lower, because the screw rod needs long-time continuous work, uses under high pressure environment moreover, easy cracked problem after long-time the use.

The utility model discloses a realize like this, a supercritical microfoaming extrusion device's screw rod structure, including the screw rod body, the end of body is equipped with first spiral portion, the outside at body middle part is equipped with a plurality of second spiral portions the same with first spiral portion screw direction, the outside interval of body is equipped with a plurality of third spiral portions opposite with second spiral portion screw direction, the outside of second spiral portion is equipped with a plurality of breachs, the interval is the third of second spiral portion between the crest of third spiral portion and the bottom of the tooth, the bottom of the tooth width of third spiral portion is twice of second spiral portion.

As the utility model discloses preferred, the breach is the toper, the one side of first spiral portion is kept away from to the one end orientation of flaring on the breach.

As the utility model discloses preferred, be equipped with annular portion between first spiral portion and the second spiral portion, annular portion is the toper, the one end diameter that annular portion is close to first spiral portion is greater than the other end.

As the utility model discloses it is preferred, many chutes have been seted up on the outer wall of annular portion, the chute is the heliciform, the spiral direction of chute is the same with first spiral portion.

Compared with the prior art, the beneficial effects of the utility model are as follows:

1. the utility model discloses a set up the screw rod body, the material of screw rod body adopts the screw rod material of supercritical microfoaming extrusion equipment on the market, first spiral position is in the end of body, a conveying for the material, the pitch of second spiral portion is less than the pitch of first spiral portion, make the material pressure around the second spiral portion be higher than first spiral portion one side, can make things convenient for the material to carry first spiral portion one side, the quantity of second spiral portion is a plurality of, the screw direction of a plurality of second spiral portions is the same, can conveniently in time carry first spiral portion one side with the material, the third spiral portion is opposite with the screw direction of second spiral portion, can improve the intensity of screw rod body, fracture when can avoiding the screw rod to rotate, can prolong the dwell time of material on the screw rod, can make the material mix more abundant, the height of third spiral portion is less than second spiral portion, the width of third spiral portion is greater than second spiral portion, the top of third spiral portion is streamlined, can make things convenient for the back and forth movement of material, avoid causing the jam of material, the breach can make the material of second spiral portion both sides carry out certain buffering spiral portion, the damage one side of avoiding the overpressure of second spiral portion.

2. The utility model discloses a set up conical breach, can make the material circulate first spiral portion one side more easily, can be further make things convenient for the transport of material.

3. The utility model discloses a set up conical annular portion, the annular portion can carry out certain partition to the material of both sides, can avoid the material of first spiral portion one side to flow back in a large number, and the annular portion outside of conical portion can form the chamber complementary with the annular portion, and a side area that this chamber is close to first spiral portion is less than the opposite side, can make the material can be more easily pressed first spiral portion one side, makes things convenient for the transport of material.

4. The utility model discloses a set up many chutes, can make the pressure part of first spiral portion one side shift to the opposite side of annular portion, can appear the not hard up problem of annular portion, avoid appearing the too big problem that causes the screw rod to damage of local pressure, spiral helicine chute can further improve the intensity of annular portion simultaneously.

Drawings

Fig. 1 is a schematic structural diagram provided in an embodiment of the present invention;

fig. 2 is an enlarged view of a point a in fig. 1 according to an embodiment of the present invention.

In the figure: 1. a body; 2. a first spiral portion; 3. and a second helical portion; 4. a third spiral portion; 5. a notch; 6. an annular portion; 7. a chute.

Detailed Description

In order to further understand the contents, features and effects of the present invention, the following embodiments are illustrated and described in detail with reference to the accompanying drawings.

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

As shown in fig. 1 to 2, an embodiment of the present invention provides a screw structure of supercritical micro-foaming extrusion device, including a screw body 1, the end of the body 1 is equipped with a first spiral part 2, the outside at the middle part of the body 1 is equipped with a plurality of second spiral parts 3 that have the same spiral direction as the first spiral part 2, the outside interval of the body 1 is equipped with a plurality of third spiral parts 4 that have the opposite spiral direction as the second spiral parts 3, the outside of the second spiral parts 3 is equipped with a plurality of notches 5, the interval is one third of the second spiral parts 3 between the crest and the root of the third spiral parts 4, the root width of the third spiral parts 4 is two times of the second spiral parts 3.

The utility model discloses a set up screw rod body 1, the material of screw rod body 1 adopts the screw rod material of supercritical microfoaming extrusion equipment on the market, first spiral portion 2 is located the end of body 1, a conveying for the material, the pitch of second spiral portion 3 is less than the pitch of first spiral portion 2, make the material pressure around the second spiral portion 3 be higher than first spiral portion 2 one side, can make things convenient for the material to carry first spiral portion 2 one side, the quantity of second spiral portion 3 is a plurality of, the spiral direction of a plurality of second spiral portions 3 is the same, can conveniently in time carry first spiral portion 2 one side with the material, third spiral portion 4 is opposite with the spiral direction of second spiral portion 3, can improve the intensity of screw rod body 1, fracture when can avoiding the screw rod to rotate, can prolong the dwell time of material on the screw rod, can make the material mix more abundant, the height of third spiral portion 4 is less than second spiral portion 3, the width of third spiral portion 4 is greater than second spiral portion 3, the top of third spiral portion 4 is the streamlined, can make things convenient for the back and forth movement of material, avoid the round trip movement of material to cause the damage of the breach of second spiral portion 3, the buffering portion 3 that the material to carry out certain pressure of the damage of the material, the breach of the both sides that can avoid the material to lead to the second spiral portion 3.

Referring to fig. 2, the notch 5 is tapered, and one end of the flared end of the notch 5 faces to the side away from the first spiral part 2.

Adopt above-mentioned scheme: through setting up conical breach 5, can make the material circulate 2 one sides of first spiral portion more easily, can further make things convenient for the transport of material.

Referring to fig. 2, an annular portion 6 is disposed between the first spiral portion 2 and the second spiral portion 3, the annular portion 6 is tapered, and a diameter of one end of the annular portion 6 close to the first spiral portion 2 is larger than that of the other end.

Adopt above-mentioned scheme: through setting up conical annular portion 6, annular portion 6 can carry out certain separation to the material of both sides, can avoid the material of 2 one sides of first spiral portion to flow back in a large number, and 6 outsides of annular portion of conical portion can form the chamber complementary with annular portion 6, and this chamber is close to a side area of first spiral portion 2 and is less than the opposite side, can make the material can more easily be pressed 2 one sides of first spiral portion, makes things convenient for the transport of material.

Referring to fig. 2, a plurality of inclined grooves 7 are formed in the outer wall of the annular portion 6, the inclined grooves 7 are spiral, and the spiral direction of the inclined grooves 7 is the same as that of the first spiral portion 2.

Adopt above-mentioned scheme: through setting up many chutes 7, can make the pressure part of first spiral portion 2 one side shift to the opposite side of annular portion 6, can appear the not hard up problem of annular portion 6, avoid appearing the too big problem that causes the screw rod to damage of local pressure, spiral helicine chute 7 can further improve the intensity of annular portion 6 simultaneously.

It should be noted that, in this document, relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a supercritical microfoaming extrusion device's screw rod structure, includes screw rod body (1), its characterized in that: the end of body (1) is equipped with first spiral portion (2), the outside at body (1) middle part is equipped with a plurality of second spiral portion (3) the same with first spiral portion (2) spiral direction, the outside interval of body (1) is equipped with a plurality of third spiral portion (4) opposite with second spiral portion (3) spiral direction, the outside of second spiral portion (3) is equipped with a plurality of breach (5), the interval is the third of second spiral portion (3) between the crest of third spiral portion (4) and the bottom of a tooth, the width of the bottom of a tooth of third spiral portion (4) is twice of second spiral portion (3).

2. The screw structure of a supercritical microfoaming extrusion apparatus according to claim 1, wherein: the notch (5) is conical, and one end of the flaring on the notch (5) faces to one side far away from the first spiral part (2).

3. The screw structure of a supercritical microfoaming extrusion apparatus according to claim 1, wherein: an annular part (6) is arranged between the first spiral part (2) and the second spiral part (3), the annular part (6) is conical, and the diameter of one end, close to the first spiral part (2), of the annular part (6) is larger than that of the other end of the annular part.

4. A screw structure of a supercritical microfoaming extrusion apparatus according to claim 3, wherein: a plurality of chutes (7) are formed in the outer wall of the annular portion (6), the chutes (7) are spiral, and the spiral direction of the chutes (7) is the same as that of the first spiral portion (2).