CN217226593U

CN217226593U - One-step screw extruder

Info

Publication number: CN217226593U
Application number: CN202220997142.XU
Authority: CN
Inventors: 雷念臣; 康健
Original assignee: Nanjing Ky Chemical Machinery Co ltd
Current assignee: Nanjing Ky Chemical Machinery Co ltd
Priority date: 2022-04-26
Filing date: 2022-04-26
Publication date: 2022-08-19
Anticipated expiration: 2032-04-26

Abstract

The utility model relates to an extruder technical field especially relates to a one-step method screw extruder, including the barrel, install the screw rod in the barrel, driving motor is installed to the one end of barrel, and the screw rod comprises A screw rod and B screw rod, and the length of B screw rod is greater than the length of A screw rod, is provided with the connection runner in the barrel, connects the runner and is used for carrying the material of A screw rod head to the B screw rod on, and the other end of barrel is connected with ejection of compact return bend, and ejection of compact return bend is connected with extrudes the head. The utility model discloses a double-screw structure of different length and thickness can guarantee the output capacity of screw to the material, can cool down according to the demand simultaneously and extrude temperature sensitive material, compares in normal double screw extruder, and withstand voltage level and stability are higher, can realize that an extruder is supporting and the dual application of directly extruding, need not follow-up increase melt pump or single screw rod and cool down or the pressure boost is extruded.

Description

One-step method screw extruder

Technical Field

The utility model relates to an extruder technical field especially relates to a one-step method screw extruder.

Background

Under the big environment of present environmental protection consciousness reinforcing, need satisfy high productivity, high efficiency and operation reliable and stable simultaneously in the technology production, adopt the one-step method extrusion process can be fine realize the material homogeneous mixing and direct molding, can practice thrift material reheat melting's energy consumption, avoided secondary treatment to reduce the product quality, improved production efficiency by a wide margin, reduce the human cost.

However, the screw extruders currently used in the market are generally classified into single screw and twin screw extruders. Although the single screw has a good extruder pressure, the shearing force is low, and the excellent mixing effect cannot be maintained while the temperature is reduced. The double screws have good mixing effect and moderate shearing force, but the extrusion pressure is low, if one-step extrusion is needed, a pressurizing device is needed, in the production process of some heat-sensitive materials, the material performance is reduced due to the shearing heat of the double screws or the over-high head pressure, and the like, so that direct extrusion cannot be realized.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a one-step process screw extruder to solve the problem that proposes among the above-mentioned background art.

The utility model discloses a realize through following technical scheme:

the utility model provides a one-step method screw extruder, its structure includes the barrel, installs the screw rod in the barrel, and driving motor is installed to the one end of barrel, the screw rod comprises A screw rod and B screw rod, the length of B screw rod is greater than the length of A screw rod, be provided with the connection runner in the barrel, connect the runner and be used for carrying the material of A screw rod head to the B screw rod on, the other end of barrel is connected with ejection of compact return bend, ejection of compact return bend is connected with extrudes the head.

Preferably, the length of the B screw rod is 8-12D.

Preferably, the radius of the section of the B screw is larger than that of the section of the A screw.

As a further proposal of the utility model, the feeding part of the connecting flow passage is arranged into a funnel shape.

Preferably, the discharging part of the connecting flow channel is obliquely arranged.

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

1. the utility model discloses a double-screw structure of different length and thickness can guarantee the output capacity of screw to the material, can cool down according to the demand simultaneously and extrude temperature sensitive material.

2. The utility model discloses compare in normal double screw extruder, withstand voltage level and stability are higher, can realize that an extruder is supporting with the dual application of directly extruding, need not follow-up increase melt pump or single screw rod and cool down or the pressure boost is extruded.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly described below, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a schematic view of the overall structure of the present invention;

fig. 2 is a schematic top view of the present invention;

fig. 3 is a partially enlarged schematic view of the barrel of the present invention.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.

Example 1:

as shown in fig. 1-3, the embodiment provides a one-step screw extruder, the screw extruder is disposed on a support frame 1, the screw extruder includes a cylinder 5 for mixing materials, a screw is installed in the cylinder 5, a driving motor 2 for driving the screw to operate is installed at one end of the cylinder 5, the driving motor 2 drives a transmission case 3 to operate, the transmission case 3 drives the screw to rotate through a connecting shaft assembly 4, the screw is composed of an a screw 51 and a B screw 52, the length of the B screw 52 is greater than that of the a screw 51, the section radius of the B screw 52 is greater than that of the a screw 51, the B screw 52 is thicker and can ensure continuous conveying of the materials, a connecting flow channel 53 is disposed in the cylinder 5, the connecting flow channel 53 is used for conveying the materials at the head of the a screw 51 to the B screw 52, a discharge elbow 6 is connected to the other end of the cylinder 5, and the discharge elbow 6 is connected to an extrusion head 7.

Example 2:

as shown in fig. 1 to 3, in the one-step screw extruder described in embodiment 1, the length of the screw B52 is 8 to 12D, and the length can be adjusted as required, so as to facilitate temperature reduction and extrusion of the heat-sensitive material, the feeding portion of the connecting flow channel 53 is funnel-shaped, the discharging portion of the connecting flow channel 53 is inclined, so as to facilitate conveying of the material from the head of the screw a 51 to the screw B52, and the rest is the same as in embodiment 1.

The working principle of the utility model is as follows:

materials such as thermosensitive materials are poured into a machine barrel 5 of the double-screw extruder from a feeding hole, the materials firstly pass through the screw rod A51 in the mixing process, then are conveyed to the screw rod B52 from the head part of the screw rod A51 through the connecting channel 53, the screw rod B52 is longer than the screw rod A51, the radius of the cross section of the screw rod B52 is larger than that of the screw rod A51, the advanced conveying of the materials can be realized, the materials are conveyed to the discharge elbow pipe 6 after being mixed through the screw rod B52, the materials are subjected to pressure reduction extrusion through the extrusion head 7, and the extrusion efficiency of the materials can be improved by changing the groove depth of threads in the conveying process.

The in-process is directly extruded to the B screw rod, and the quilt that the B screw rod bore is pressed and will be improved by a wide margin, considers the atress reinforcing of B screw rod axle, the utility model discloses use withstand voltage high thrust bearing in the gear box. The utility model discloses in, the B screw rod has the withstand voltage level 35Mpa that equals with the single screw rod of the same type, far exceeds the withstand voltage limit 15Mpa of ordinary twin-screw. The utility model discloses compare in normal double screw extruder, withstand voltage level and stability are higher, can realize that an extruder is supporting and the dual application of directly extruding, need not follow-up increase melt pump or single screw rod and cool down or the pressure boost is extruded.

The preferred embodiments of the present invention disclosed above are intended only to help illustrate the present invention. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and its practical applications, to thereby enable others skilled in the art to best understand the invention for and utilize the invention. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. The utility model provides a one-step method screw extruder, includes the barrel, installs the screw rod in the barrel, and driving motor, its characterized in that are installed to the one end of barrel: the screw rod comprises A screw rod and B screw rod, the length of B screw rod is greater than the length of A screw rod, be provided with the connection runner in the barrel, connect the runner and be used for carrying the material of A screw rod head to B screw rod on, the other end of barrel is connected with ejection of compact return bend, ejection of compact return bend is connected with extrudes the head.

2. A one-step screw extruder as claimed in claim 1, wherein: the length of the B screw rod is 8-12D.

3. A one-step screw extruder as claimed in claim 1, wherein: the radius of the section of the B screw is larger than that of the section of the A screw.

4. A one-step screw extruder as claimed in claim 1, wherein: the feeding part of the connecting flow passage is funnel-shaped.

5. A one-step screw extruder as claimed in claim 1, wherein: the discharging part of the connecting flow passage is obliquely arranged.