CN210211268U

CN210211268U - A back pressure stick for production of polyether ether ketone rod

Info

Publication number: CN210211268U
Application number: CN201920582407.8U
Authority: CN
Inventors: Sen Zhang; 张森; Jian Liu; 刘建; Ping Yang; 杨萍
Original assignee: Suzhou Jutai New Materials Co Ltd
Current assignee: Suzhou Jutai New Materials Co Ltd
Priority date: 2019-04-26
Filing date: 2019-04-26
Publication date: 2020-03-31
Anticipated expiration: 2029-04-26

Abstract

The utility model relates to a back pressure stick for production of polyether ether ketone rod, including the depression bar and with the dead lever that the depression bar is fixed, depression bar and the coaxial setting of dead lever, be equipped with the sawtooth screw thread on the dead lever, this back pressure stick for production of polyether ether ketone rod, execution compaction fuse-element work that not only can be fine only needs rotatory this back pressure stick to separate rod and back pressure stick after the rod takes out moreover, need not the cutting, toasts, strikes the operation such as, convenient operation, save time, raises the efficiency.

Description

A back pressure stick for production of polyether ether ketone rod

Technical Field

The utility model relates to a polyether ether ketone rod production field, in particular to back pressure stick for production of polyether ether ketone rod.

Background

Polyetheretherketone (PEEK) materials are widely used in aerospace, automobile manufacturing, semiconductors, food, petrochemical industry, etc. due to their excellent mechanical properties, heat resistance, fatigue resistance, abrasion resistance, hydrolysis resistance, and chemical reagent resistance. The PEEK bar is used as a section bar, can be used for machining precision gears, machining wear-resistant gears, machining precision wear-resistant bearings and supporting parts of some electrical equipment, and has wide application. In the PEEK bar processing, because the processing temperature is high, the melt flow viscosity is large, the condition that the melt is not full can be generated, and air holes and tunnels are formed in the bar, and the bar is bent and uneven. A cylindrical back pressure rod is inserted into the machine head, and the melt is compacted under certain pressure to prepare the high-quality PEEK rod material. Meanwhile, in the stage of starting bar extrusion, a back pressure bar is needed to carry out extrusion and shaping of the traction bar. The back pressure rod used at present is an aluminum rod, and a joint capable of being mechanically meshed is arranged at one end of the rod, which is in contact with the melt. Such joints are not subjected to any processing and are difficult to remove after the melt has solidified. At present, the method for taking out the polyether-ether-ketone bar is that after the bar is extruded out, the part of the polyether-ether-ketone bar close to a back pressure bar is cut off, and then the resin part is knocked out after the polyether-ether-ketone is softened by high-temperature baking. The whole process consumes time, labor and energy, and is very inconvenient.

Therefore, a new back pressure rod for producing a polyether-ether-ketone rod needs to be provided to solve the problems.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a back pressure stick for production of polyether ether ketone rod, the work of execution compaction polyether ether ketone fuse-element that can be fine need not cutting, toasts, strikes other operations such as can take off after using up simultaneously, is convenient for operate, save time, raises the efficiency.

The utility model provides a technical scheme that its technical problem adopted is: the utility model provides a back pressure stick for production of polyether ether ketone rod, its include the depression bar and with the dead lever that the depression bar is fixed, depression bar and dead lever coaxial setting, be equipped with the sawtooth screw thread on the dead lever.

Specifically, the length of the compression bar is 1m to 3 m.

Specifically, the length of sawtooth screw thread is 40mm to 60mm, the diameter of sawtooth screw thread is 20mm to 40mm, the pitch of sawtooth screw thread is 3mm to 5 mm.

Specifically, the tooth form of the sawtooth thread is in the shape of an unequal-waist trapezoid, the tooth angle of the working surface is 3 degrees, the tooth side angle of the non-working surface is 30 degrees, and a round angle is arranged between the working surface and the non-working surface.

Specifically, the sawtooth thread of the fixing rod is subjected to sand blasting treatment and is electrostatically sprayed with a polytetrafluoroethylene coating.

The utility model relates to a back pressure stick for production of polyether ether ketone rod's beneficial effect is, execution compaction fuse-element work that not only can be fine, only need rotatory this back pressure stick can separate rod and back pressure stick after the rod takes out moreover, need not the cutting, toasts, strikes the operation such as, convenient operation, save time, raise the efficiency.

Drawings

The present invention will be further explained with reference to the drawings and examples.

Fig. 1 is a schematic structural diagram of a back pressure rod for producing a polyetheretherketone bar according to the present invention;

FIG. 2 is an enlarged view of portion A of FIG. 1;

in the figure: 1. the structure comprises a compression bar, 2 parts of a fixing rod, 21 parts of a working surface, 22 parts of a non-working surface and 23 parts of a round angle.

Detailed Description

The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic drawings and illustrate the basic structure of the present invention only in a schematic manner, and thus show only the components related to the present invention.

As shown in fig. 1, the back pressure rod for producing the polyether ether ketone bar comprises a pressure rod 1 and a fixing rod 2 fixed to the pressure rod 1, wherein the pressure rod 1 and the fixing rod 2 are coaxially arranged, and the fixing rod 2 is provided with sawtooth threads.

Specifically, the length of the compression bar 1 is 1m to 3 m.

As shown in fig. 2, the tooth form of the buttress thread is an isosceles trapezoid, the tooth measurement angle of the working surface 21 is 3 °, the tooth flank angle of the non-working surface 2221 is 30 °, and a fillet 23 is arranged between the working surface 21 and the non-working surface 2221. After the polyetheretherketone fuse-element cooling solidifies, provide mechanical snap-in through the sawtooth screw thread, sawtooth screw thread working face 21 can promote the snap-in greatly as the stress surface, the fashioned rod of quick convenient traction out, and sawtooth screw thread's non-working face 2221 is great because the flank angle, the rotation of back pressure stick after can being convenient for back pressure stick and rod can break away from fast, and fillet 23 then can reduce stress concentration, prevents that the rod from damaging.

Specifically, the sawtooth thread of the fixing rod 2 is subjected to sand blasting treatment and is electrostatically sprayed with a polytetrafluoroethylene coating. The polytetrafluoroethylene coating can reduce the adhesive force between the polyether-ether-ketone melt and the fixing rod 2, and the bar is convenient to separate from the fixing rod 2 in the later period.

The working principle of the back pressure rod for producing the polyether-ether-ketone bar material is as follows: firstly, a pressure lever 1 enters a die, a polyether-ether-ketone melt is compacted to be molded and coated on a fixed rod 2, then the polyether-ether-ketone melt is cooled and solidified into a polyether-ether-ketone bar, then the pressure lever 1 is pulled out through external drive to separate the polyether-ether-ketone bar from the die, finally the bar is fixed, and the pressure lever 1 is rotated to separate the bar from the pressure lever 1.

Compared with the prior art, this a back pressure stick for production of polyether ether ketone rod, execution compaction fuse-element work that not only can be fine only needs this back pressure stick of rotation can separate rod and back pressure stick after the rod is taken out moreover, need not operations such as cutting, toast, strike, convenient operation, save time, raise the efficiency.

In light of the foregoing, it will be apparent to those skilled in the art from this disclosure that various changes and modifications can be made without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.

Claims

1. The back pressure rod for production of the polyether-ether-ketone bar is characterized by comprising a pressure rod and a fixed rod fixed with the pressure rod, wherein the pressure rod and the fixed rod are coaxially arranged, and the fixed rod is provided with sawtooth threads.

2. The back pressure bar for PEEK bar production of claim 1, wherein the length of the pressure bar is 1m to 3 m.

3. The back pressure bar for peek rod production according to claim 1, wherein the length of the buttress thread is 40mm to 60mm, the diameter of the buttress thread is 20mm to 40mm, and the pitch of the buttress thread is 3mm to 5 mm.

4. The back pressure bar for the production of PEEK bars of claim 1, wherein the tooth profile of the sawtooth thread is of a trapezoid with unequal waist, the tooth angle of the working surface is 3 degrees, the tooth side angle of the non-working surface is 30 degrees, and a round angle is arranged between the working surface and the non-working surface.

5. The back pressure bar for PEEK bar production of claim 1, wherein the serrated threads of the fixing bar are sand blasted and electrostatically coated with a PTFE coating.