CN2141761Y

CN2141761Y - Double-screw polyester melt extruder

Info

Publication number: CN2141761Y
Application number: CN92242962U
Authority: CN
Inventors: 王泽新
Original assignee: Individual
Current assignee: Individual
Priority date: 1992-11-27
Filing date: 1992-11-27
Publication date: 1993-09-08
Anticipated expiration: 2002-11-27

Abstract

The utility model relates to a polyester melt extruding machine. In the prior art, when used as raw material to spin and make films, polyester needs drying process, and the production quality can be affected through powder dust produced during the drying. The machine is provided with two threaded rods which have the same structures and are engaged; the machine is divided into five to eight working regions through a barrier component and a steady flow structure, and the interiors of the two to three working regions of the five to eight working regions are provided with vacuum pumping devices through which a plurality of functions of melt, vacuum pumping dehydration, and high pressure extrusion are simultaneously completed; accordingly, polyester slices which are not dried can be directly melted and spun, the drying process is omitted, the production quality is improved, and the cost is reduced. Waste clothing considering terylene waste silk and terylene as the raw material as the raw material can be directly melted and spun through the machine.

Description

Double-screw polyester melt extruder

The utility model belongs to a kind of screw extruder that polyester slice is melt extruded.

Be that raw material spins terylene silk or system film at present with the polyester slice, must be through the super-dry treatment process, because the polyester slice of drying processing is not when fusion, the moisture that includes can make the polyester hydrolysis, molecular weight reduces, Qi Hua moisture can make the molten state polyester produce many minute bubbles simultaneously, and production can not normally be carried out.And in drying process, because the phase mutual friction of section, must produce the polyester dust, after these dust dryings, molecular weight exceeds 3000-5000 than normal section molecular weight, and under identical melting condition, the polyester dust of HMW is difficult to fusion, thereby worsened working condition, reduced product quality.In recent years, require the physics and the uniform occasion of chemical property height of polyester fondant at some, making as superfine fibre, the pulsed high density that adopt are carried more, to reduce the generation of dust, shorten drying time simultaneously, to reduce its influence, both made so, drying medium also can be brought some dusts into, influences product quality.

The utility model aims to provide a kind of to the polyester slice fusion time, can remove the wherein screw extruder of contained humidity simultaneously, thereby reach the purpose of saving dry treatment process.

For reaching above-mentioned purpose, the utility model adopts following structure: it comprises machine barrel 9, be contained in the screw rod 7 in the machine barrel, heater 8, screw actuator 12, the feeder 6 that communicates with the machine barrel inner chamber, be positioned at the head connector 11 of barrel head, support 13 etc., it is characterized in that: described screw rod 7 is formed by rotating intermeshing two identical screw rods of structure in the same way, this is divided into the 5-8 section to screw flight, its head is that 2-3 section engaged gap is less, can form the rectangular thread of high pressure, there is the junction of the two sections screw threads in 2-3 place to be provided with barrier means 14 at these several sections rectangular thread rear portions, the structure of barrier means is that the 2-3 sheet is vertical with screw rod and concentric, the rounded tabs that diameter is identical with screw thread, have the punishment in advance mouth on the catch, in 2-3 zone that is separated by barrier means, be provided with vacuum extractor, the junction of other two sections screw threads in position of screw rod is designed to make the molten state material all to press the current stabilization structure of current stabilization, is provided with the detection part that can send signal to control system at the screw rod suitable position.

Operation principle of this machine and process are: screw actuator drives screw rod and rotates, reinforced in machine barrel by feeder, solid-state polyester slice is become molten state by the screw rod extrusion shearing in the tube chamber of heater heating, and constantly be pushed to and advance, 2-3 the vacuum extractor that this machine is provided with can extract out the air in the corresponding machine barrel zone, form negative pressuren zone, thereby remove the moisture and the low-molecular material that flow through in this zone-melting attitude material, screw head 2-3 section rectangular thread can increase the pressure that transports material, satisfies the requirement of high pressure outputting material.Set barrier means, a function is that the remaining solid phase of blocking in the material that advances makes its thorough fusion, another critical function is to make the barrier means both sides isolated mutually, has not only needed the high-pressure work district but also has needed the negative pressure workspace and created condition to satisfy this machine for forming different working condition pressure districts.

This machine vacuumizes the district according to the different 2-3 that are provided with of raw material, the molten state material is vacuumized through 2-3 time remove moisture and the low-molecular material that includes, because this machine screw rod is provided with the barrier means of band punishment in advance mouth, guaranteeing that material is constantly when the punishment in advance mouth passes through, screw rod is divided into several zones of isolated sealing mutually, so the vacuumizing negative pressuren zone and can not influence other required different operating modes in zone of aforementioned setting, make this function finish fusion simultaneously, vacuumize dehydration and high pressure and extrude several functions, thereby can the polyester slice that undried is handled directly be melt extruded, reach the requirement of spinning and system film, so both disadvantages of having avoided aforementioned drying process to bring, improve product quality, saved the equipment and the energy again, reduced product cost.This machine can also carry out spinning again or system film with polyester (terylene) waste silk, the useless direct fusion of film, can will with polyester (terylene) the various waste and old clothing of raw material, bedding carry out fusion again, make and make polyester reinforced plastics etc. after various industrial nonwoven or the pelletizing.

Description of drawings:

Fig. 1: the utility model example structure schematic diagram.

(be the clear running part structure that shows, this figure screw rod adopts the half-twist signal)

1, motor 2, reduction box 3, thrust bearing

4, feeder transmission mechanism 5, hopper 6, feeder

7, screw rod 8, heater 9, machine barrel

10, porous plate 11, head connector 12, screw actuator

13, support 14, barrier means 15, current stabilization structure

Fig. 2: the utility model embodiment barrier means structural representation.

20, catch 21, punishment in advance mouth

Fig. 3: the utility model embodiment circular arc screw thread and engagement thereof.

Fig. 4: the utility model embodiment rectangular thread and engagement thereof.

Fig. 5: the utility model embodiment current stabilization structural representation.

Fig. 6: the utility model embodiment screw portion front view.

22, vacuum pumping device

Fig. 7: vacuum pumping device C-C is to generalized section.

23, flange 24, hood

25, vacuum pumping chamber 26, vacuum pumping pipe

Fig. 8: the utility model embodiment three district's four-point melt pressure sensors are provided with the position.

Fig. 9: the utility model embodiment two district's bikini melt pressure sensors are provided with the position.

Now the utility model is described in further detail in conjunction with the embodiments.

Forwardtransfer signal worm embodiment illustrated in fig. 1 is divided into 8 sections, 5 sections of postmedians are bigger arc toothed of pitch, its engagement situation as shown in Figure 3, this profile of tooth back lash is bigger, head is that the spiral shell square is less for 3 sections, the rectangle profile of tooth that screw channel is more shallow, and its engagement situation is as shown in Figure 4, this profile of tooth back lash is less, can form the required elevated pressures of extruding part.

Present embodiment is provided with barrier means 14 at several the 1st, 2 section, 2,3 sections from the screw rod rear portion between 4,5 sections screw threads, and the concrete structure of this barrier means is seen Fig. 2; 2-3 sheet and concentric rounded tabs 20 vertical with screw rod is set on the screw rod between two sections screw threads, and the catch diameter is identical with the diameter of thread, has punishment in advance mouth 21 on the catch, and it is shaped as several elongated shape gap that points to center of circle direction from circumferential edges.

Above-mentioned punishment in advance mouth also can be designed to circular hole.

Current stabilization structure between the present embodiment screw thread is the smooth round bar that one section diameter is slightly less than the diameter of thread as shown in Figure 5.

Present embodiment is provided with vacuum extractor 22 at several the 1st, 3 and the 5th sections screw thread places of screw rod tail, its concrete structure is: vacuumize at needs establish above the machine barrel at threaded portion position one communicate with the machine barrel inner chamber, outer top vacuumized chamber 25 by what flange 23 sealed, establish an air inlet in this cavity and be positioned near the hood 24 of intermeshing two screw rods outer surface, cover rear portion and is turned 90 ° of angles and is communicated from the blast pipe 26 that cavity wall passes, during use vavuum pump and blast pipe afterbody are joined, can extract air and moisture in the chamber out.This structure can reduce the knot charcoal of gas exhaust piping inwall to prevent to tie the material that charcoal falls into fusion.

In order to prevent that vacuumizing district's material bubbling expands, stops up gas exhaust piping, present embodiment is provided with the float-type level-sensing device in the vacuum pumping district, crossing the bubbling that mostly occurs when the material that is attached to screw surface expands when contacting the floating drum head, sensor can send signal to control system, duties such as the charging of adjustment extruder, transmission speed.

The present embodiment screw head is an anallobar for three sections, because the screw rod postmedian is provided with and vacuumizes negative pressuren zone, therefore need the monitoring and the control of reinforcement to the head working condition, Fig. 8 is the position that is provided with of present embodiment screw head three district's four-point melt pressure sensors, promptly between the 1st section and the 2nd section screw thread, establish a pressure indication control record sensor PICR respectively, between the 2nd and the 3rd section screw thread, establish 2 pressure indication control record sensor PICR, for the ease of observing, head also can be established a pressure indication record sensor PIR, and the depended on pressure sensor guarantees not contain molten state polyester stably feeding under certain pressure of bubble by control system control delivery rate.

Establish 2 sections anallobars as screw head,, promptly establish 1, establish 2 pressure indication control record sensor PICR between the 1st section and the 2nd section screw thread at head then at head setting two district's bikini melt pressure sensors as shown in Figure 9.

The screw actuator 12 of present embodiment is made up of motor shown in Figure 11, reduction box 2, thrust bearing 3, and feeder 6 is made up of hopper 5, feeder transmission mechanism 4.Head connector 11 comprises the porous plate 10 that is located at machine barrel 9 front portions.

Claims

1, a kind of polyester melt extrudes machine, comprise machine barrel, be contained in the screw rod in the machine barrel, heater, screw actuator, the feeder that communicates with the machine barrel inner chamber, be positioned at the head connector of barrel head, support, it is characterized in that: described screw rod is formed by rotating the identical screw rod of intermeshing two root architectures in the same way, this is divided into the 5-8 section to screw flight, its head is that 2-3 section engaged gap is less, can form the rectangular thread of high pressure, there is the junction of the two sections screw threads in 2-3 place to be provided with barrier means at these several sections rectangular thread rear portions, the structure of barrier means is that the 2-3 sheet is vertical with screw rod and concentric, the rounded tabs that diameter is identical with screw thread, have the punishment in advance mouth on the catch, in 2-3 zone that is separated by barrier means, be provided with vacuum extractor, the junction of other two sections screw threads in position of screw rod is designed to make the molten state material all to press the current stabilization structure of current stabilization, is provided with the detection part that can send signal to control system in the suitable working position of screw rod.

2, polyester as claimed in claim 1 melt extrudes machine, it is characterized in that: describedly be: vacuumize the chamber that vacuumizes of establishing a sealing that communicates with the machine barrel inner chamber above the machine barrel at threaded portion position at needs at the vacuum extractor concrete structure that is provided with in the isolated area, establish an air inlet in the chamber and be positioned near the hood of intermeshing two screw rods outer surface, cover rear portion and is turned 90 ° of angles and is communicated from the blast pipe that cavity wall passes, and blast pipe afterbody and vavuum pump join.

3, polyester as claimed in claim 1 melt extrudes machine, it is characterized in that: the punishment in advance mouth is shaped as several point to center of circle direction from circumferential edges elongated shape gap on the described barrier means catch.

4, polyester as claimed in claim 2 melt extrudes machine, it is characterized in that: the punishment in advance mouth is shaped as several point to center of circle direction from circumferential edges elongated shape gap on the described barrier means catch.

5, melt extrude machine as claim 1 or 2 or 3 or 4 described polyester, it is characterized in that: the installation site of the pressure sensor of the described detection part that is arranged in the suitable working position of screw rod is: when head has three sections screw thread anallobars, establishing one between first section on head and the second section screw thread, establishing 2 pressure indication control record sensors between the 2nd section and the 3rd section screw thread; When head has 2 sections screw thread anallobars, establish one, between first section and the 2nd section screw thread, establish 2 pressure indication control record sensors at head.

6, melt extrude machine as claim 1 or 2 or 3 or 4 described polyester, it is characterized in that: the current stabilization structure of described two sections screw thread junctions is the smooth round bar that one section diameter is slightly less than the diameter of thread.

7, polyester as claimed in claim 5 melt extrudes machine, it is characterized in that: the current stabilization structure of described two sections screw thread junctions is the smooth round bar that one section diameter is slightly less than the diameter of thread.