阅读说明：本技术 用于挤出机的挤出螺杆 (Extrusion screw for extruder ) 是由 杨昊 于 2018-06-26 设计创作，主要内容包括：本发明公开了一种用于挤出机的挤出螺杆,所述挤出螺杆包括内部的螺杆和外部壳体,所述螺杆直径由前端向后端逐渐增大,其上相邻螺纹之间间距由前端向后端逐渐增大。本发明的挤出螺杆,其螺杆槽内不易形成条状积聚物,同时控制消除颗粒间的间隙,有效提高了挤出效率与挤出质量。(The invention discloses an extrusion screw for an extruder, which comprises an inner screw and an outer shell, wherein the diameter of the screw is gradually increased from the front end to the rear end, and the distance between adjacent threads on the screw is gradually increased from the front end to the rear end. The extrusion screw rod of the invention has the advantages that strip-shaped accumulated matters are not easy to form in the screw rod groove, the gaps among particles are controlled and eliminated, and the extrusion efficiency and the extrusion quality are effectively improved.)

1. An extrusion screw for an extruder, the extrusion screw comprising an inner screw and an outer housing, wherein the screw has a diameter that increases from a front end to a rear end, and wherein the spacing between adjacent threads increases from the front end to the rear end.

2. Extrusion screw for an extruder according to claim 1, characterised in that the outer wall of the extrusion screw is provided with electrical heating means.

3. The extrusion screw for an extruder according to claim 1, wherein a neck is provided at a front end of the screw, and the neck is connected to the transmission gear.

4. The extrusion screw for an extruder according to claim 1, wherein a feed port is provided on the outer casing, and the feed port is communicated with the dryer.

Technical Field

The invention relates to the field of screw extrusion equipment, in particular to an extrusion screw for a screw extruder.

Background

The extruder is used for fully mixing and extruding various particle raw materials and outputting the raw materials, and is mainly applied to the field of plastic or rubber manufacturing machinery. In the current domestic plastic processing industry, the output of an extruder determines the efficiency of a production line, and the energy consumption of the extruder accounts for most of the energy consumption of the production line.

The extrusion screw is an important part in the extruder, the extrusion efficiency and the extrusion quality of the extruder are greatly influenced, and the conventional extrusion screw generally has the problem that strip-shaped accumulation is easily formed in a screw groove, so that the extrusion efficiency is influenced.

Disclosure of Invention

The technical problem to be solved by the invention is to provide an extrusion screw for an extruder, compared with the prior art, strip-shaped accumulated materials are not easy to form in a screw groove of the extrusion screw, and the extrusion efficiency and the extrusion quality are improved.

In order to solve the above technical problems, the present invention provides an extrusion screw for an extruder, the extrusion screw including an inner screw and an outer casing, the screw having a diameter gradually increasing from a front end to a rear end, and a pitch between adjacent threads thereon gradually increasing from the front end to the rear end.

In a preferred embodiment of the invention, the outer wall of the extrusion screw is provided with an electric heating device.

In a preferred embodiment of the present invention, a locking groove is disposed at a front end of the screw rod, and the locking groove is connected to the transmission gear.

In a preferred embodiment of the present invention, a reserved feed port is formed in the outer casing, and the feed port is communicated with the dryer.

The invention has the beneficial effects that:

according to the extrusion screw disclosed by the invention, the distance between adjacent threads is gradually increased from the front end to the rear end, so that the probability of forming strip-shaped accumulated objects in the groove of the extrusion screw can be reduced, the gaps among particles are controlled and eliminated, and the extrusion efficiency and the extrusion quality can be effectively improved.

Drawings

FIG. 1 is a schematic structural view of one embodiment of an extrusion screw of the present invention;

wherein: 100. extruding a screw; 200. an electric heating device; 300. a screw; 310. a card slot; 320. a thread; 400. an outer housing; 410. and (4) feeding a material inlet.

Detailed Description

The present invention is further described below in conjunction with the following figures and specific examples so that those skilled in the art may better understand the present invention and practice it, but the examples are not intended to limit the present invention.

All publications, patent applications, patents, and other references mentioned in this specification are herein incorporated by reference in their entirety. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art. In case of conflict, the present specification, including definitions, will control.

When the specification concludes with claims with the heading "known to those skilled in the art", "prior art", or the like, to derive materials, substances, methods, procedures, devices, or components, etc., it is intended that the subject matter derived from the heading encompass those conventionally used in the art at the time of filing this application, but also include those that are not currently in use, but would become known in the art to be suitable for a similar purpose.

In the context of the present specification, anything or things which are not mentioned, except where explicitly stated, are directly applicable to those known in the art without any changes. Moreover, any embodiment described herein may be freely combined with one or more other embodiments described herein, and the technical solutions or concepts resulting therefrom are considered part of the original disclosure or original disclosure of the invention, and should not be considered as new matters not disclosed or contemplated herein, unless a person skilled in the art would consider such a combination to be clearly unreasonable.

Referring to fig. 1, the present embodiment provides an extrusion screw 100 for a screw extruder, comprising an inner screw 300 and an outer casing 400, wherein the diameter of the screw 300 is gradually increased from the front end to the rear end, and the distance between adjacent threads 320 is gradually increased from the front end to the rear end, so that the probability of strip-shaped accumulation in the groove of the extrusion screw 100 can be reduced, and the gaps between the particles can be controlled and eliminated.

In the invention, the front end of the screw rod 300 is provided with a clamping groove 310, and the clamping groove 310 is connected with the transmission gear; the outer shell 400 is provided with a reserved feed inlet 410, and the feed inlet 410 is communicated with the dryer. In order to mix and extrude the injection molding particles at a proper temperature, the outer wall of the extrusion screw 100 is provided with an electric heating device 200.

According to the extrusion screw 100 of the embodiment, the distance between the adjacent threads 320 is gradually increased from the front end to the rear end, so that the probability of strip-shaped accumulation in the groove of the extrusion screw 100 can be reduced, the gaps among the particles can be controlled and eliminated, and the extrusion efficiency and the extrusion quality can be effectively improved.

The above-mentioned embodiments are merely preferred embodiments for fully illustrating the present invention, and the scope of the present invention is not limited thereto. The equivalent substitution or change made by the technical personnel in the technical field on the basis of the invention is all within the protection scope of the invention. The protection scope of the invention is subject to the claims.