CN212072902U

CN212072902U - Screw structure for extruding and granulating high-strength glass fiber reinforced material

Info

Publication number: CN212072902U
Application number: CN202020650171.XU
Authority: CN
Inventors: 周奇洋; 彭伟伟; 张辉闪; 文斌
Original assignee: Ningbo Ecot Sci & Tech Co ltd
Current assignee: Ningbo Ecot Sci & Tech Co ltd
Priority date: 2020-04-26
Filing date: 2020-04-26
Publication date: 2020-12-04
Anticipated expiration: 2030-04-26

Abstract

The utility model relates to a screw rod structure for extruding and granulating high-strength glass fiber reinforced materials, which comprises two screw rods and a sleeve, wherein the two screw rods are arranged in the sleeve in parallel, and each screw rod is sequentially provided with a first conveying section, a kneading section, a reverse conveying section, a second conveying section, a kneading block, a conveying block, a slotting and mixing section, a reverse conveying section, a third conveying section, a kneading block and a fourth conveying section from left to right; the utility model slows down the feeding speed of the mixture by the notch on each SME threaded element, thereby prolonging the mixing time of the mixture and realizing the full mixing; and the mixture is reversely conveyed for a certain distance by the reverse conveying section, so that the mixture is prevented from generating overhigh shearing heat, the nylon resin is prevented from being decomposed, the rapid reduction of the length of the glass fiber is avoided, and the performance of the material is ensured.

Description

Screw structure for extruding and granulating high-strength glass fiber reinforced material

Technical Field

The utility model relates to a screw rod structure that is used for fine reinforcing material of high strength glass to extrude granulation.

Background

The nylon as an engineering plastic not only has excellent mechanical property and better electrical property, but also has wear resistance, oil resistance, solvent resistance, self-lubrication, corrosion resistance, heat resistance and good processability, and is widely applied; however, nylon 6 and nylon 66, which are engineering plastics, have the greatest defects of high water absorption, unstable product size and changed performance.

Therefore, researches on high performance of nylon composite materials are more and more concerned, wherein glass fiber reinforced modification is the most common physical modification method, and after the nylon is reinforced by glass fibers, the heat resistance and the mechanical property are greatly improved and the dimensional stability is also obviously improved while the original advantages of processability, chemical resistance and the like are maintained. However, as the content of the glass fiber is gradually increased, the difficulty in the production, extrusion and granulation process is correspondingly increased when the content of the glass fiber exceeds 50%.

Researches find that the diameter and the length of the glass fiber have obvious influence on the mechanical property of the nylon composite material, the length of the glass fiber reserved in the material is too short, the tensile strength and the elastic modulus of the material are reduced, and the deformation is increased; the length of the reserved glass fiber is too long, when the content of the glass fiber exceeds 50%, the production and processing are unstable, the glass fiber is easy to break, the glass fiber is exposed, and the particles are broken when being granulated. Therefore, in the production of the nylon material with high glass fiber content, how to keep proper glass fiber length in the extrusion granulation process is a problem to be solved, and the balance between material performance and production processability is achieved.

In the prior art, a double-screw structure is generally adopted to improve strong shearing action to disperse glass fibers, and although the method can better disperse the glass fibers, high-content glass fibers and nylon resin are not sufficiently mixed, and a large amount of heat is generated by friction under the shearing of a kneading block, so that the nylon resin is decomposed, the length of the glass fibers is rapidly reduced, the performance of the material is greatly reduced, and the method is to be further improved.

SUMMERY OF THE UTILITY MODEL

To above-mentioned prior art's current situation, the utility model aims to solve the technical problem that a feed rate that has slowed down the mixture is with extension mixing time is provided to realized the intensive mixing, and enabled the mixture reverse transportation certain distance in order to prevent that the mixture from producing too high shear heat, thereby prevent that the nylon resin from taking place to decompose, and avoid glass fiber length sharply to descend, extrude the screw rod structure of granulation with the fine reinforcing material of glass for high strength who has guaranteed the material performance.

The utility model provides a technical scheme that above-mentioned technical problem adopted does: a screw rod structure for granulation is extruded to fine reinforcing material of high strength glass, including screw rod and sleeve, the screw rod includes two, and two equal parallels of screw rod locate in the sleeve, its characterized in that, every the screw rod from left to right is equipped with first transport section, mediate section, reverse transport section, second transport section, is kneaded the piece, is carried the piece, the mixed section of fluting, reverse transport section, third transport section, is kneaded the piece and is carried the section with the fourth, the charge door has been seted up to telescopic left end, telescopic middle part has been seted up and has been leaned on feed inlet and vacuum vent, the outside that the second was carried the section is located to the side feed inlet, the outside that the third was carried the section is located to the vacuum vent.

Preferably, 10 cavities are formed in the upper side of the sleeve, the feeding port is arranged in the cavity at the leftmost side, the side feeding port is arranged in the fifth cavity from left to right, and the vacuum exhaust port is arranged in the third cavity from right to left.

Preferably, the slotted mixing section is composed of a plurality of SME threaded elements connected end to end; and the outer side of each SME threaded element is provided with a notch which is distributed annularly.

Preferably, the kneading apparatus further comprises a plurality of shear blocks, wherein the plurality of shear blocks are fixed on the outer side of the kneading blocks at equal angles in the circumferential direction, and each shear block is perpendicular to the axial direction of the screw.

Compared with the prior art, the utility model has the advantages of: the utility model slows down the feeding speed of the mixture by the notch on each SME threaded element, thereby prolonging the mixing time of the mixture and realizing the full mixing; and the mixture is reversely conveyed for a certain distance by the reverse conveying section, so that the mixture is prevented from generating overhigh shearing heat, the nylon resin is prevented from being decomposed, the rapid reduction of the length of the glass fiber is avoided, and the performance of the material is ensured.

Drawings

Fig. 1 is a front view structural diagram of the present invention.

Detailed Description

Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by those of ordinary skill in the art to which the invention belongs. The use of "first," "second," and similar terms in the description herein do not denote any order, quantity, or importance, but rather the terms are used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that the element or item listed before the word covers the element or item listed after the word and its equivalents, but does not exclude other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships may also be changed accordingly.

To maintain the following description of the embodiments of the present invention clear and concise, detailed descriptions of well-known functions and components may be omitted.

As shown in fig. 1, a screw structure for high-strength glass fiber reinforced material extrusion granulation, including screw 1 and sleeve 2, screw 1 includes two, two equal parallel of screw 1 locate in sleeve 2, every screw 1 is equipped with first transport section 11 from left to right in proper order, knead section 12, reverse transport section 13, second transport section 14, knead piece 15, transport piece 16, fluting mixing section 17, reverse transport section 18, third transport section 19, knead piece 110 and fourth transport section 111, charge door 3 has been seted up to the left end of sleeve 2, side feed inlet 4 and vacuum vent 5 have been seted up at the middle part of sleeve 2, side feed inlet 4 locates the outside of second transport section 14, vacuum vent 5 locates the outside of third transport section 19.

The upper side of the sleeve 2 is provided with 10 cavities 21, the feed inlet 3 is arranged in the leftmost cavity 21, the side feed inlet 4 is arranged in the fifth cavity 21 from left to right, and the vacuum exhaust port 5 is arranged in the third cavity 21 from right to left.

The slotted mixing section 17 is composed of a plurality of SME threaded elements 171, the plurality of SME threaded elements 171 being connected end to end; the outer side of each SME threaded element 171 is provided with a circumferentially distributed notch 172.

In a preferred embodiment of the present invention, further comprising a plurality of cutouts 6, the cutouts 6 are fixed at equal angles along the circumferential direction outside the kneading section 12, and each cutout 6 is perpendicular to the axial direction of the screw 1.

When in use: the two screws 1 rotate in opposite directions, nylon resin is fed into the sleeve 2 through the feed inlet 3 and fed rightwards under the action of the first conveying section 11, and when passing through the kneading section 12, the nylon resin is uniformly crushed under the action of the plurality of shearing blocks 6; then, the glass fiber is fed into the sleeve 2 through the side feeding port 4, the nylon resin and the glass fiber are pre-sheared by the kneading block 15 under the action of the second conveying section 14, so that the nylon resin and the glass fiber are rapidly distributed in the nylon resin to form a mixture, the mixture enters the slotted mixing section 17 through the conveying block 16, the mixture generates a 'leakage flow' phenomenon under the action of the notch 172 of each SME threaded element 171, namely the feeding flow is reduced, so that the retention time of the mixture in the slotted mixing section 17 is increased, then, the mixture enters the reverse conveying section 18 and is reversely conveyed back to the slotted mixing section 17 to be continuously and repeatedly mixed, so that the mixing effect is improved, and the mixture is placed to generate high shearing heat; then the mixture enters the kneading block 110 under the action of the third conveying section 19 to prevent the mixture from agglomerating, and air in the sleeve 2 is discharged outwards through the vacuum exhaust port 5; and finally extruded outwardly through a fourth conveying section 111 for drawing and pelletizing. The length of the glass fiber in the material can be effectively maintained through the utility model, and simultaneously, good mixing and dispersion are provided, and the traction granulation is easy; whereas the SME threaded element 171 belongs to the prior art.

The utility model slows down the feeding speed of the mixture by the notch 172 on each SME threaded element 171, and further prolongs the mixing time of the mixture, thereby realizing the full mixing; and the mixture is reversely conveyed for a certain distance by the reverse conveying section 18, so that the mixture is prevented from generating overhigh shearing heat, the nylon resin is prevented from being decomposed, the rapid reduction of the length of the glass fiber is avoided, and the performance of the material is ensured.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those skilled in the art that various changes in the embodiments and modifications thereof may be made, and equivalents may be substituted for elements thereof; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.

Claims

1. A screw rod structure for granulation is extruded to fine reinforcing material of high strength glass, including screw rod and sleeve, the screw rod includes two, and two equal parallels of screw rod locate in the sleeve, its characterized in that, every the screw rod from left to right is equipped with first transport section, mediate section, reverse transport section, second transport section, is kneaded the piece, is carried the piece, the mixed section of fluting, reverse transport section, third transport section, is kneaded the piece and is carried the section with the fourth, the charge door has been seted up to telescopic left end, telescopic middle part has been seted up and has been leaned on feed inlet and vacuum vent, the outside that the second was carried the section is located to the side feed inlet, the outside that the third was carried the section is located to the vacuum vent.

2. The screw structure according to claim 1, wherein the sleeve has 10 cavities formed on the upper side thereof, the feed inlet is disposed in the leftmost cavity, the side feed inlet is disposed in the fifth cavity from left to right, and the vacuum exhaust outlet is disposed in the third cavity from right to left.

3. The screw structure for extrusion granulation of high strength fiberglass reinforced material according to claim 1, wherein said slotted mixing section is comprised of a plurality of SME flighted elements connected end to end; and the outer side of each SME threaded element is provided with a notch which is distributed annularly.

4. The screw structure for extrusion pelletizing of high strength glass fiber reinforced material according to claim 1, further comprising a plurality of cutouts fixed at equal angles in the circumferential direction on the outer side of the kneading block, each of the cutouts being perpendicular to the axial direction of the screw.