CN218803808U

CN218803808U - Professional screw rod for degrading EVA (ethylene-vinyl acetate copolymer)

Info

Publication number: CN218803808U
Application number: CN202222512752.9U
Authority: CN
Inventors: 赵子明; 傅春旺; 张彦富
Original assignee: Ningbo Jinyi Precision Machinery Co ltd
Current assignee: Ningbo Jinyi Precision Machinery Co ltd
Priority date: 2022-09-22
Filing date: 2022-09-22
Publication date: 2023-04-07
Anticipated expiration: 2032-09-22

Abstract

The utility model discloses a degradation EVA specialty screw rod, including mixing section, screw rod section and canned paragraph, screw rod section one end is equipped with mixing section, the screw rod section other end is equipped with the canned paragraph, mixing section, screw rod section and canned paragraph are cylindricly, mixing section, screw rod section and canned paragraph axis collineation, mixing section has the mixing portion of first spiral and the mixing portion of second spiral, the mixing portion one end of second spiral is equipped with the mixing portion of first spiral, the mixing portion of second spiral one end and screw rod section fixed connection in addition, through setting up the mixing portion of a plurality of spirals in mixing section, the mixing that makes the plastic material of molten condition can be abundant before the ejection of compact is even to let injection moulding's the plastic product surface that reaches bright and clean, the requirement such as toughness is good.

Description

Professional screw rod for degrading EVA

Technical Field

The utility model relates to an injection moulding processing technology field especially relates to a degradation EVA specialty screw rod.

Background

The EVA has a wide application field, the annual market consumption of China is continuously increased, and the EVA is particularly applied to soles, interior materials and the like of middle-high-grade travel shoes, climbing shoes, slippers and sandals in the manufacturing industry. EVA material needs and various compounding chemicals mixed use when producing shoes, and the EVA material after mixing can improve each item performance of shoes, but the screw rod in the current injection molding machine is when mixing the material, and the short mixing section can't be fully mixed with the EVA material, and the EVA material technology of not fully mixing is not up to standard, leads to the product batch that produces to scrap easily, causes huge economic loss, consequently designs EVA specialty screw rod for solving above-mentioned problem.

SUMMERY OF THE UTILITY MODEL

Not enough to current screw rod of moulding plastics, the utility model aims at providing a degradation EVA specialty screw rod has advantages such as make the material fully mix, plastify.

In order to achieve the above object, the utility model discloses a technical scheme be: a professional screw for degrading EVA (ethylene-vinyl acetate copolymer) comprises a mixing section, a screw section and a fixing section, wherein the mixing section is arranged at one end of the screw section, the fixing section is arranged at the other end of the screw section, the mixing section, the screw section and the fixing section are cylindrical, the axes of the mixing section, the screw section and the fixing section are collinear, the mixing section is provided with a first spiral mixing part and a second spiral mixing part, one end of the second spiral mixing part is provided with a first spiral mixing part, and one end of the other part of the second spiral mixing part is fixedly connected with the screw section;

preferably, the first spiral mixing part and the second spiral mixing part have the same structure and are provided with spiral grooves, a plurality of spiral grooves are arranged on the circumferences of the first spiral mixing part and the second spiral mixing part, the spiral angle of each spiral groove is 30 degrees, and the width of each spiral groove is 9mm;

preferably, the screw section is provided with a first thread rib and a second thread rib, the first thread rib completely covers the screw section, one end of the screw section is provided with the second thread rib, one end of the second thread rib forms an opening with the first thread rib, the other end of the second thread rib forms a closed opening with the first thread rib, the outer diameter of the first thread rib is d1, the outer diameter of the second thread rib is d2, and d1 is larger than d2;

the utility model has the advantages that: the plurality of spiral mixing parts are arranged on the mixing section, so that molten plastic materials can be fully and uniformly mixed before being discharged, and the injection molding can meet the requirements of smooth surface, good toughness and the like of plastic products.

Drawings

FIG. 1 is a view showing the structure of the present invention;

FIG. 2 is an enlarged view of a portion of the area I of FIG. 1 according to the present invention;

fig. 3 is a partial enlarged view of the area II in fig. 1 according to the present invention.

Detailed Description

The following description of the preferred embodiments of the present invention will be provided with reference to the accompanying drawings, so that the advantages and features of the present invention can be easily understood by those skilled in the art, and the scope of the present invention can be clearly and clearly defined.

It should be noted that in the description of the present invention, the terms of direction or positional relationship indicated by the terms "upper", "lower", "left", "right", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, which are only for convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

Furthermore, it should be noted that, in the description of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," "provided," and "disposed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

Referring to fig. 1 to 3, an embodiment of the present invention includes:

a professional screw for degrading EVA (ethylene vinyl acetate) comprises a mixing section 1, a screw section 2 and a fixed section 3, wherein one end of the screw section 2 is provided with the mixing section 1, the other end of the screw section 2 is provided with the fixed section 3, the mixing section 1, the screw section 2 and the fixed section 3 are cylindrical, the axes of the mixing section 1, the screw section 2 and the fixed section 3 are collinear, the mixing section 1 is provided with a first spiral mixing part 11 and a second spiral mixing part 12, one end of the second spiral mixing part 12 is provided with the first spiral mixing part 11, and the other end of the second spiral mixing part 12 is fixedly connected with the screw section 2;

the first spiral mixing part 11 and the second spiral mixing part 12 are identical in structure and are provided with spiral grooves 111, a plurality of spiral grooves 111 are arranged on the circumferences of the first spiral mixing part 11 and the second spiral mixing part 12, the spiral angle of each spiral groove 111 is 30 degrees, and the width of each spiral groove 111 is 9mm;

the screw section 2 is provided with a first thread rib 21 and a second thread rib 22, the first thread rib 21 completely covers the screw section 2, one end of the screw section 2 is provided with the second thread rib 22, one end of the second thread rib 22 and the first thread rib 21 form an opening 23, the other end of the second thread rib 22 and the first thread rib 21 form a closed opening 24, the outer diameter of the first thread rib 21 is d1, the outer diameter of the second thread rib 22 is d2, and d1 is larger than d2;

through the arrangement, in the actual working process, the specific working principle is as follows:

firstly, a screw fixing section 3 is installed in an injection molding machine and clamped and fixed, so that the injection molding machine can drive the screw to rotate, a cavity is formed by a screw section 2 and an inner cylinder of the injection molding machine, EVA particles stored in a hopper are continuously driven to a mixing section by a first thread rib 21 under the action of the screw, granular plastics are heated to be softened by a charging barrel in the process, then the softened granular plastics are pushed to one end of the screw section 2, and the softened granular plastics become a molten viscous flow state in the process;

then, the material in a molten viscous flow state is contacted with the first thread convex rib 21 and the second thread convex rib 22 simultaneously, the closed opening 24 can play a role in blocking the process of conveying the material by the screw, so that solid particles can be completely heated and melted, when the material is driven to the opening 23, the opening 23 can reduce resistance and increase the discharging speed, and the melted material is extruded by the first thread convex rib 21 and the second thread convex rib 22 and moves from the screw section 2 to the mixing section 1;

the melted materials firstly pass through the second spiral mixing part 12, the melted materials are driven by the spiral groove 111 on the circumference of the second spiral mixing part 12 to be mixed for the first time, the materials after the first mixing are continuously pressed into the first spiral mixing part 11, the spiral groove 111 on the circumference of the first spiral mixing part 11 drives the materials again to be mixed for the second time, and the melted plastics after the second mixing can be fully and uniformly mixed, so that the EVA plastics can be plasticized uniformly and cannot be carbonized and yellowed due to shearing heat; the two sections of mixing parts can enable the plastic to flow according to the mixing groove, the flowing direction of the plastic does not have too much disordered flow, rectification of the plastic material can be formed, and the raw material plasticization can be accelerated by the two sections of mixing design;

the above-mentioned only be the embodiment of the present invention, not consequently the restriction of the patent scope of the present invention, all utilize the equivalent structure or equivalent flow transform made of the content of the specification and the attached drawings, or directly or indirectly use in other relevant technical fields, all including in the same way the patent protection scope of the present invention.

Claims

1. The utility model provides a degradation EVA specialty screw rod, its characterized in that, includes mixed section, screw rod section and fixed segment, screw rod section one end is equipped with mixed section, the screw rod section other end is equipped with the fixed segment, mixed section, screw rod section and fixed segment are cylindricly, mixed section, screw rod section and fixed segment axis collineation, mixed section has the mixed portion of first spiral and the mixed portion of second spiral, the mixed portion one end of second spiral is equipped with the mixed portion of first spiral, the mixed portion one end of second spiral is other and screw rod section fixed connection.

2. The specialized screw for degrading EVA of claim 1, wherein the first and second spiral mixing parts have the same structure and are provided with spiral grooves, the circumferences of the first and second spiral mixing parts are provided with a plurality of spiral grooves, the spiral angle of the spiral grooves is 30 degrees, and the width of the spiral grooves is 9mm.

3. The professional screw rod for degrading EVA of claim 1, wherein the screw section has a first thread rib and a second thread rib, the first thread rib completely covers the screw section, one end of the screw section is provided with the second thread rib, one end of the second thread rib forms an opening with the first thread rib, the other end of the second thread rib forms a closed opening with the first thread rib, the outer diameter of the first thread rib is d1, the outer diameter of the second thread rib is d2, and d1 is greater than d2.