CN210590495U

CN210590495U - Screw extruder

Info

Publication number: CN210590495U
Application number: CN201921218033.8U
Authority: CN
Inventors: 唐帆; 黎广; 费大壮; 强金凤; 雷国安; 路丽珠; 陶克军; 张开炳; 孙岳红
Original assignee: Anhui World Village Intelligent Equipment Co ltd
Current assignee: Anhui World Village Intelligent Equipment Co ltd
Priority date: 2019-07-29
Filing date: 2019-07-29
Publication date: 2020-05-22
Anticipated expiration: 2029-07-29

Abstract

The utility model discloses a screw extruder belongs to rubber and plastic processing equipment field. The screw extruder of the utility model comprises a screw extruder main body; the machine barrel is sequentially divided into a heating section, a reaction section and a cooling section along the material extrusion direction, and the machine barrel is formed by connecting barrel blocks; the barrel block is cuboid and is provided with a first end face and a second end face which are oppositely arranged and four side faces which connect the first end face with the second end face; the cylinder block is provided with a material cylinder which is a through hole formed by vertically penetrating from the first end surface to the second end surface and used for accommodating a screw of the screw extruder; the barrel block further includes: the mounting hole is a through hole which vertically penetrates through the opposite side surfaces of the cylinder block, and the mounting hole and the material cylinder are arranged in a staggered manner; and the heating device is an electric heating element arranged in the mounting hole. The utility model discloses cross set up the built-in heating device of mounting hole on the section of thick bamboo piece of constituteing the barrel, carry out even effectual heating to the barrel, improved the comprehensive properties of final extrusion product.

Description

Screw extruder

Technical Field

The utility model belongs to rubber and plastic processing machinery equipment field, more specifically say, relate to a screw extruder.

Background

The screw extruder is a conventional rubber and plastic processing mechanical device and is widely applied to polymer blending, filling modification, regeneration and extrusion molding granulation. Temperature is one of the most important factors in many chemical reactions, since it is an important marker of energy transfer. Such as blending, filling modification, regeneration and extrusion molding granulation of the above polymers belong to the quality of the final product obtained after the synergistic action of thermal/mechanical shearing, wherein the temperature plays a crucial role.

In view of rubber in the polymer, plastics etc. all belong to insulator and heat transfer capacity is very weak, adopt screw extruder to carry out the course of working to it, traditional heating methods such as conduction oil, the outer heating methods of wrapping up outside the barrel of heating devices such as heating jacket electrical heating, the heating efficiency to the barrel is low, be difficult to make the inside quick thermally equivalent of its material, can lead to the cold burden in earlier stage to be difficult to rapid heating up and in the material course of working lead to the fact the scorch because of local overheat or lead to inside material to press from both sides because of the heat transfer difficulty and give birth to because of, and then make the comprehensive properties of final product relatively poor and very unstable. Therefore, the search for a stable and efficient heating mode with low cost is very important for the rubber and plastic product processing field and is also closely concerned by researchers in the rubber and plastic processing field.

Through retrieval, the Chinese patent publication number: CN203228397U, published: 2013, 10 and 9, discloses an electromagnetic heating system of a single-screw extruder, which comprises an electromagnetic heating device consisting of an extruder barrel and a die head, a hopper arranged on the extruder barrel, and temperature measuring points uniformly arranged on the extruder barrel, wherein the extruder barrel is covered with a layer of heat-insulating material, an electromagnetic coil is wound on the extruder barrel covered with the heat-insulating material, and a shield is arranged at the upper end of the extruder barrel. Although this application has adopted this kind of internal heating's of electromagnetic heating mode, has solved the problem that traditional heating methods is low to the heating efficiency of barrel, realizes the rapid heating, but the temperature rise and fall wayward in the screw extruder, the condition that heating temperature is too high to appear easily and lead to the material to burn in the material jar takes place.

SUMMERY OF THE UTILITY MODEL

1. Problems to be solved

To the low problem that leads to extruding the material performance poor of heating efficiency among the current screw extruder extrusion process, the utility model provides a screw extruder carries out even effectual heating to the barrel through seting up the built-in heating device of mounting hole on the barrel of constituteing the barrel, has improved the comprehensive properties of final extrusion product.

2. Technical scheme

In order to solve the above problems, the utility model adopts the following technical proposal.

A screw extruder, comprising a screw extruder having,

a screw extruder body;

the device comprises a machine barrel, a heating section, a reaction section and a cooling section, wherein the machine barrel is sequentially divided into the heating section, the reaction section and the cooling section along the material extrusion direction and is formed by connecting barrel blocks;

the barrel block is cuboid and is provided with a first end face and a second end face which are oppositely arranged and four side faces which connect the first end face with the second end face;

the cylinder block is provided with a material cylinder which is a through hole formed by vertically penetrating from the first end face to the second end face and used for accommodating a screw of a screw extruder;

the barrel block further includes:

the mounting holes are through holes vertically penetrating through opposite side surfaces of the cylinder block, and the mounting holes and the material cylinder are arranged in a staggered mode;

a heating device which is an electric heating element arranged in the mounting hole.

When materials such as waste rubber are regenerated by the screw extruder, the temperature control of the machine barrel is an important factor influencing the final extruded product, the machine barrel of the traditional screw extruder adopts an external heating mode, the heating efficiency of the machine barrel is low, the materials in the machine barrel are difficult to uniformly reach the required temperature in limited extrusion time, the phenomena of entrainment or scorching in the product are easy to occur, the quality of the final product is influenced, the safety of the traditional external heating mode is low, the energy consumption is high, the heat loss is serious, and aiming at the problems, the screw extruder is improved by the application, and more specifically, the machine barrel component of the screw extruder is improved.

The machine barrel of the screw extruder is sequentially divided into three sections according to the extrusion direction of materials: the device comprises a heating section, a reaction section and a cooling section, wherein the three sections are formed by sequentially connecting barrel blocks with the same shape and size, the barrel blocks are cuboid, the end surfaces of the barrel blocks are sequentially connected to form a barrel, a material cylinder in the barrel blocks is used for accommodating an extruder screw and a material added into the screw extruder, and the material is heated, reacted and extruded in the material cylinder; the scheme is characterized in that a through hole is formed in the side face of the barrel block, the through hole is perpendicular to the side face, the mounting hole and the material cylinder are not overlapped, the mounting hole is arranged in a staggered mode, and the electric heating element is placed into the mounting hole.

In the scheme, a plurality of mounting holes are formed in the barrel block, heating devices are arranged in the barrel block, when the screw extruder is operated, the electric heating elements are started, each electric heating element generates heat, the heat is uniformly and stably emitted in the mounting holes, and the heat is generated from the inside of the barrel to heat materials in the barrel, compared with the traditional heating mode, the scheme has high heating efficiency, the heating blocks are uniformly and stably heated, the occurrence of material clamping and scorching conditions is avoided, and because the electric heating elements are arranged in the barrel block in the mounting holes, the external heat loss is small, the energy consumption is saved, the existing electric heating elements can achieve the effect of flexible temperature regulation and control, through the structure of the scheme, the extrusion temperature can be accurately controlled by controlling the heating amount of the electric heating elements, the performance of extruded products is further ensured, when the electric heating elements in the mounting holes are damaged, can be taken out and replaced independently without disassembling the screw extruder, thereby saving the maintenance cost and further reducing the production cost.

Further, the heating device is a heating rod.

The heating rod is a current equipment, the heating rod of this scheme comprises heating rod body and cable, heating rod body shape and mounting hole shape phase-match, for an preferred scheme of electric heating element, insert the heating rod body in the mounting hole during the use to insert current temperature control unit with the cable and carry out heating rod temperature control, the heating rod of this scheme can be convenient carry out the dismouting in the mounting hole, and the heating rod can unified control, change alone during the damage, convenient to use and cost of maintenance are low.

Furthermore, the cylinder block forming the reaction section also comprises heat insulation layers which are formed on the surfaces of the four side surfaces of the cylinder block.

The reaction section of the barrel of the screw extruder usually needs the material cylinder in the barrel to have higher temperature so as to facilitate the sufficient reaction among materials in the extrusion process, therefore, the temperature of the barrel in the section is higher, compared with other two sections of barrels, the heat dissipation of the barrel in the reaction section is larger, in the scheme, the heat preservation layers made of heat preservation materials are wrapped on the surfaces of the four side surfaces of the barrel block, the heat dissipation of the barrel in the reaction section is further prevented, the heating pressure of the heating device in the barrel block is reduced, and the energy consumption is saved.

Furthermore, a cooling liquid flow channel is further arranged on the cylinder block forming the reaction section, the cooling liquid flow channel is a through hole vertically penetrating from the first end face to the second end face, and the cooling liquid flow channel, the mounting hole and the material cylinder are arranged in a staggered mode.

In the cylinder material cylinder of the reaction section, besides the heat generated by the heating device, the friction among the screw, the material and the material cylinder also generates heat, the reaction among the materials also generates heat, when the side surface of the cylinder block is wrapped with the heat-insulating layer, the heat is slowly dissipated, besides the heat of the heating device, the additionally generated heat can cause the temperature in the cylinder material of the reaction section to exceed the optimal set temperature, although the temperature can be returned to the set interval by controlling the heating device, the temperature is slowly recovered by the method, the reaction of the material of the reaction section can be influenced, and the performance of the final extruded product is influenced, aiming at the problem, the scheme is that the cylinder block is provided with a cooling liquid flow channel, wherein cooling liquid can be introduced, when the temperature in the cylinder material of the reaction section is overhigh, the cooling liquid is introduced into the cooling liquid flow channel to cause the temperature in the cylinder material to return to the set interval in time, and the adverse influence of the performance, the cooling liquid flow channel is matched with the heat preservation layer in the scheme, so that the temperature of the reaction section material cylinder can be controlled more conveniently and timely, and the performance of the product is further ensured.

Furthermore, a cooling liquid channel is further arranged on the cylinder block forming the cooling section, the cooling liquid channel is a through hole vertically penetrating from the first end face to the second end face, and the cooling liquid channel, the mounting hole and the material cylinder are arranged in a staggered mode.

The cooling section is positioned at the tail end of the machine barrel and is the last section through which the material is extruded, the cooling section needs to cool the material to prevent the material outlet from being oxidized, the cooling speed cannot be too high, the phenomenon that the material is unevenly cooled and blocked in the material cylinder to influence the smooth operation of the material and the product performance is prevented, therefore, the cooling section needs to ensure uniform and effective cooling, and the cooling section is provided with a cooling liquid flow passage in the scheme, the material fed into the cooling section through the reaction section is cooled by continuous heat exchange in a manner of continuously introducing cooling liquid into the cooling liquid flow channel, the cooling liquid flow channel is arranged in the cylinder block around the material cylinder in the scheme and the direction of the cooling liquid flow channel is parallel to the material flow direction in the material cylinder, so that the material can be uniformly and effectively cooled, meanwhile, the heating device in the barrel block can prevent the temperature of the cooling section from being too low, and the phenomenon that the product performance and the production progress are influenced by the coagulation of materials in the cooling section is avoided.

Further, cooling liquid flow channels on the cylinder blocks forming the reaction section and the cooling section respectively and independently operate.

In the cooling section, the coolant liquid runner need let in the coolant liquid constantly in the production process and come to cool down the material in the material jar, and in the reaction section, the coolant liquid runner just need let in the coolant liquid when reaction section temperature transfinites and carries out the quick adjustment back of temperature, consequently, the coolant liquid runner of both ends barrel piece is not intercommunicated, and independent work does not influence each other separately.

A method for regenerating rubber by a screw extruder comprises the following steps:

firstly, preheating; starting a heating rod, and heating a machine barrel to 100-150 ℃;

secondly, starting feeding: starting the screw extruder, and adding the waste rubber and the regenerant into the screw extruder;

thirdly, extruding materials: the waste rubber and the regenerant are extruded after sequentially passing through a heating section, a reaction section and a cooling section in a machine barrel, wherein the temperature of the heating section is controlled to be 100-150 ℃, the temperature of the reaction section is controlled to be 150-250 ℃, and the temperature of the cooling section is controlled to be 70-120 ℃.

The screw extruder is adopted for waste rubber regeneration, the heating rod is started to preheat the machine barrel, so that the temperature of a material cylinder in the machine barrel reaches 100-150 ℃, the preheating temperature cannot be too low, when the temperature is lower than 100 ℃, the material cannot reach corresponding temperature in each machine barrel section in time after being added, the preheating temperature cannot be too high, and when the temperature is higher than 150 ℃, the material is just added into the extruder, oxidation may occur firstly, so that the main chain of the rubber is damaged, and the subsequent product performance is poor; preheating to a specified temperature, starting a screw extruder, adding waste rubber and a regenerant into the screw extruder, enabling the material to pass through a heating section, controlling the temperature of the heating section to be 100-150 ℃, enabling the material to be rapidly and uniformly heated in the heating section, effectively isolating oxygen, fully mixing the waste rubber and the regenerant through the heating section to enable the regenerant to permeate into the waste rubber, enabling the penetrating effect of the regenerant on the waste rubber to be poor when the temperature of the heating section is lower than 100 ℃, influencing the sulfur-cut regeneration of rubber in a reaction section, enabling the temperature of the heating section to be too low, enabling the temperature of the material to be difficult to rise to the optimal sulfur-cut regeneration temperature in time after the material enters the reaction section, and influencing the product performance, and enabling the rubber in the material to be oxidized in the heating section due to the existence of more oxygen components in the front section of the heating section when the temperature of the heating section is higher; the material is heated to a certain temperature through the heating section, oxygen is effectively isolated, the regenerant fully permeates into the waste rubber, the waste rubber enters the reaction section at the moment, the temperature of the reaction section is controlled to be 150-250 ℃, the material is subjected to desulfurization reaction in the temperature range, the desulfurization reaction cannot be rapidly carried out when the temperature of the reaction section is lower than 150 ℃, and the main chain of the rubber is easily damaged when the temperature of the reaction section is higher than 250 ℃, so that the performance of the product is greatly reduced; the material after the desulfurization reaction in the reaction section enters a cooling section, the material is uniformly and timely cooled, the temperature of the cooling section is controlled to be 70-120 ℃, when the temperature of the cooling section is lower than 70 ℃, the material is easily stagnated in a material cylinder, the smooth operation of the material is influenced, the production is influenced, and when the temperature of the cooling section is higher than 120 ℃, the material is easily oxidized to influence the performance of a product during extrusion.

Further, the rotating speed of the screw extruder is 100-250 r/min, and the length-diameter ratio of the screw is 50-65.

By controlling the length-diameter ratio and the rotating speed of a screw of the screw extruder, the extrusion time of the material in the machine barrel is controlled to be 2-5 min, the material is guaranteed to fully react in the machine barrel to complete sulfur-breaking regeneration, the desulfurization reaction is incomplete when the extrusion time is less than 2min, the rubber main chain is easy to damage when the extrusion time is more than 5min, and the regeneration efficiency is influenced.

3. Advantageous effects

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

(1) the utility model discloses a screw extruder, through set up the mounting hole on the barrel piece that constitutes screw extruder barrel, put into electric heating element, realize the internal heating to the barrel, compared with the traditional heating mode, this scheme heating efficiency is high, the intensification piece and the heating are even stable, avoided the material to press from both sides the emergence of living, the burning condition, and because electric heating element arranges in the mounting hole and is located in the barrel piece, therefore to external heat loss little, energy saving, and current electric heating element can reach the effect of nimble temperature regulation and control, through the structure of this scheme, can carry out accurate control to extrusion temperature through the heating of control electric heating element, further guarantee the performance of extruding the product, when the electric heating element in the mounting hole takes place to damage, can take out the change alone, need not to dismantle screw extruder, the cost of maintenance is practiced thrift, thereby reducing the production cost;

(2) the screw extruder adopts the heating rod as the electric heating element, can be conveniently disassembled and assembled in the mounting hole, can be uniformly controlled, can be independently replaced when damaged, and has convenient use and low maintenance cost;

(3) the utility model discloses a screw extruder, through wrap up the heat preservation that insulation material supported on the surface of four sides of the section of thick bamboo piece, further prevent the thermal dissipation of reaction section barrel, reduce the heating pressure of the heating device in the section of thick bamboo piece of this department, practice thrift the energy consumption;

(4) the utility model discloses a screw extruder is equipped with the coolant liquid runner in the section of thick bamboo piece, when the temperature was too high in the reaction section feed cylinder, let in the coolant liquid runner and make the temperature get back to in time and set for the interval in the feed cylinder, avoid the temperature to transfinite the adverse effect that produces the property and bring to extruding, the coolant liquid runner cooperates the heat preservation simultaneously, more convenient timely carries out temperature control to the reaction section feed cylinder, has further guaranteed the performance of product;

(5) the utility model discloses a screw extruder, in this scheme through be equipped with the coolant liquid runner in the cooling zone, to the material that sends into the cooling zone through the reaction section cool the temperature, in this scheme coolant liquid runner set up in the section of thick bamboo piece around the material jar and the direction is parallel with the material flow direction in the material jar, can evenly effectually cool down the material, heating device in the section of thick bamboo piece can prevent that the cooling zone temperature is low excessively simultaneously, avoids the material to congeal in the cooling zone and stagnates and influence product property ability and production progress;

(6) the utility model discloses simple structure, reasonable in design easily makes.

(7) The utility model discloses an adopt method of screw extruder reclaimed rubber, through the temperature control of material in the extrusion process, keep apart oxygen in the heating zone, fully mix waste rubber and regenerant and make the regenerant permeate waste rubber in, take place quick desulfurization reaction in the reaction zone, make the material evenly cool off in the cooling zone and prevent the coagulation and exit material oxidation, finally the product property of extruding is stable, the comprehensive properties is good;

(8) the utility model discloses an adopt method of screw extruder reclaimed rubber, through suitable rotational speed and draw-down ratio, the time of extruding of control material in the barrel guarantees that desulfurization reaction is abundant and the rubber main chain does not fracture.

Drawings

FIG. 1 is a schematic structural view of a screw extruder of the present invention;

FIG. 2 is a schematic structural view of the heating device of the present invention;

FIG. 3 is an exploded view of the cartridge of the heating section of the present invention;

FIG. 4 is a schematic structural view of the cooling section cylinder block of the present invention;

fig. 5 is a sectional view of the reaction section cylinder block of the present invention.

In the figure:

1. a screw extruder body;

2. a barrel block; 20. a material cylinder; 21. mounting holes; 22a, a first end face; 22b, a second end face; 200. a barrel; 201. a heating section; 202. a reaction section; 203. a cooling section;

3. a heating device; 30. a heating rod; 31. a circuit box; 310. a terminal block; 311. a circuit box cover; 32. a connecting flange; 33. a heat insulation plate;

4. a coolant flow passage;

5. and (7) an insulating layer.

Detailed Description

The invention will be further described with reference to specific embodiments and drawings.

Example 1

As shown in fig. 1, the screw extruder of the present embodiment includes a screw extruder main body 1 and a cylinder 200, a base end of the cylinder 200 is fixed to the screw extruder main body 1, the cylinder 200 is formed by joining a plurality of cylinder blocks 2 to each other in one direction, and the cylinder 200 is divided into a heating section 201, a reaction section 202, and a cooling section 203 along an extrusion direction of a material in the screw extruder.

As shown in fig. 3, the cylinder block 2 constituting the cylinder 200 is a rectangular parallelepiped block structure, and more specifically, the cylinder block 2 has a first end face 22a and a second end face 22b which are oppositely arranged and four side faces connecting the first end face and the second end face, the first end face 22a and the second end face 22b have the same shape, further, edge portions of the first end face 22a and the second end face 22b are protruded to the outer periphery to form a flange, fixing holes are arranged on the flange, and the cylinder blocks 2 are fixedly connected with each other through the fixing holes; a through hole is formed vertically penetrating the first end surface 22a to the second end surface 22b of the barrel block 2, and is called a material cylinder 20, and after the plurality of barrel blocks 2 are connected, the material cylinder 20 constitutes a cylinder body for accommodating a screw and a material of the extruder, specifically, the material cylinder 20 of the present embodiment has a cross-sectional shape of "∞" and is a material cylinder 20 for accommodating a twin screw, and accordingly, the screw extruder of the present embodiment is a twin screw extruder.

As shown in fig. 3, a through hole, referred to as a mounting hole 21, is vertically formed in a side surface of the cylinder block 2, the mounting hole 21 and the material cylinder 20 are arranged in a staggered manner without overlapping, specifically, the mounting hole 21 is formed only in a pair of corresponding side surfaces of the cylinder block 2, and the heating rod 30 is inserted into the mounting hole 21 in the same direction.

The heating rod 30 is constructed as shown in fig. 2 and 3, the heating rod 30 includes a heating rod body and a cable, the heating rod body is matched with the mounting hole 21 in size and shape, inserted into the mounting hole 21 from one side of the mounting hole 21 in the same direction, the cables are stored through the circuit box 31, the wiring terminal strip 310 arranged in the circuit box 31 connects and bunches the cables to form a bundle of conducting wires to be connected with a power supply and a control end, the circuit box 31 is connected with one side face inserted into the heating rod main body through the connecting flange 32, on one hand, the heating rod 30 is fixed, on the other hand, the circuit box 31 is fixed, a simple structure is formed on one side face of the barrel block 2, no messy cables exist, the cleaning and the dismounting and the maintenance are convenient, the circuit box 31 and the circuit box cover 311 store and seal a plurality of groups of cables of the heating rod 30, and a vacuum insulation board 33 is arranged between the connecting flange 32 and the circuit box 31 to prevent heat from being transferred to the circuit box 31 to; the heating rod 30 is installed from the same side, so that the equipment structure is simple, the disassembly, the maintenance and the replacement are more convenient, cables of the heating rods 30 can be bundled into the circuit box 31 more conveniently, the aging of the cables in the working condition environment is prevented, and the service life of the heating rods 30 is prolonged.

Further, in the present embodiment, the heating rods 30 are uniformly distributed around the material cylinder 20, so as to ensure that the material in the material cylinder 20 can be heated quickly and uniformly.

The mounting hole 21 and the heating rod 30 are configured as the cylinder block 2 constituting the cylinder 200 of the heating section 201, the reaction section 202 and the cooling section 203.

As shown in fig. 5, the block 2, which forms the barrel 200 of the reaction section 202, further comprises the following structure: the four sides are wrapped by heat preservation layers 5 formed by heat preservation cotton, a plurality of through holes are formed in the first end face 22a and vertically penetrate through the first end face to the second end face 22b to serve as cooling liquid flow passages 4, the cooling liquid flow passages 4 are formed around the material cylinder 20, the cooling liquid flow passages 4 are located in the cylinder block 2 between the heat preservation layers 5 and the mounting hole 21, when the fact that surplus heat can be taken away through circulation of cooling liquid in time is ensured, the cooling liquid is prevented from enabling materials in the material cylinder 20 to be quenched to affect material reaction of a reaction section, the heat preservation layers 5 prevent heat from being dissipated to the outside, the surplus heat is taken away by the cooling liquid in the cooling liquid flow passages 4, the cooling liquid and the cooling liquid are matched, the temperature of the material cylinder 20 in the reaction section 202 is uniformly and stably. The coolant flow channels 4 of the respective barrel blocks 2 of the reaction stage 202 are communicated with each other to constitute a coolant flow structure of the reaction stage 202.

As shown in fig. 4, the cylinder block 2 constituting the cylinder 200 of the cooling section 203 further includes the following structure: a plurality of through holes are formed in the first end face 22a and vertically penetrate the second end face 22b to serve as cooling liquid flow passages 4, the cooling liquid flow passages 4 are formed around the material cylinder 20 and are located in the cylinder block 2 between the side face and the mounting hole 21, the cooling liquid flow passages 4 are not too close to the material cylinder 20, and rapid cooling of materials is prevented from being stagnated on the material cylinder 20 when the cooling liquid is introduced, so that the smooth movement is influenced. The cooling liquid flow channels 4 of the cylinder blocks 2 of the cooling section 203 are communicated with each other to form a cooling liquid circulation structure of the cooling section 203, and cooling liquid is introduced into the cooling liquid circulation structure of the reaction section 202 independently from each other and runs independently from each other.

The cooling liquid of the embodiment is water, the temperature of the cooling water of the reaction section 202 and the cooling section 203 is controlled to be between 30 ℃ and 60 ℃, wherein the feeding direction of the cooling liquid of the cooling section 203 is opposite to the extrusion direction of the material, and the feeding direction of the cooling liquid of the reaction section 202 is not limited.

In the cylinder block 2 of the cooling section 203, the heating rod 30 does not work normally, the cooling water is always in a circulating state, the material in the direction close to the outlet is acted by the cooling liquid with the just introduced lower temperature through introducing the cooling liquid in the direction opposite to the material extruding direction, the material in the direction far away from the outlet is acted by the cooling liquid with the raised heat exchange temperature, so that the temperature of the cooling liquid is not too low when the material enters the cooling section 203 from the reaction section 202, the temperature of the cooling liquid is gradually lowered along with the continuous approach of the material to the outlet in the cooling section 203, in this way, in the cooling section 203, the temperature of the cooling liquid is lower along with the closer material to the outlet, although the cooling liquid with the same temperature is introduced in the same flow passage, a uniform and slow temperature reduction process is formed in the cooling section 203, and the situation of the sharp temperature reduction of the material is effectively avoided, the quality of the extruded product is improved.

Further, in this embodiment, the temperature in the cooling section 203 is controlled by a mold temperature controller, which is an existing device, the temperature of the cooling section 203 can be precisely controlled by the mold temperature controller, thereby preventing the property of the product from being affected by the over-high or over-low temperature of the cooling section 203, the temperature of the cooling water is controlled at 30-60 ℃ by the mold temperature controller, the cooling water in this temperature range circulates in the material cylinder 20 of the cooling section 203, the cooling speed of the material in the material cylinder 20 can be ensured, and meanwhile, the product performance from being affected by the rapid cooling of the material is avoided, the mold temperature controller is provided with a temperature probe in the material cylinder 20 of the cooling section 203, when the temperature in the material cylinder 20 of the cooling section 203 is lower than the set temperature, the heating rod 30 is controlled to be started to heat, and when the detected temperature is higher than the set temperature, the flow.

In this embodiment, the material cylinders 20 of the heating section 201, the reaction section 202 and the cooling section 203 are all provided with temperature probes for sensing real-time temperatures in the material cylinders 20 of the sections, so as to conveniently control the heating rod 30 and the cooling liquid to adjust the temperatures in the material cylinders 20 in time.

Example 2

A method for regenerating rubber by using the screw extruder in embodiment 1 is characterized in that a heating rod 30 is started firstly, so that a material cylinder 20 in a machine barrel 200 is preheated and heated at the heating speed of 1-2 ℃/min for 45-85 min, the temperature of the material cylinder 20 is finally preheated to 100-150 ℃, the material cylinder 20 is slowly heated and preheated by the heating rod 30, the temperature in the material cylinder 20 is ensured to be uniform, the performance of a product during material extrusion is facilitated, meanwhile, the structure of a barrel block 2 and the structure of a screw are prevented from being influenced by the temperature due to slow heating, and the effective service life of the screw extruder is prolonged; after preheating is finished, starting a screw extruder, and adding the waste rubber and the regenerant into a material cylinder 20, wherein the regenerant is a mixture of coumarone resin and pine tar in a mass ratio of 3:7, and the mass ratio of the waste rubber to the regenerant is 100: 15; in the heating section 201, the temperature is controlled to be 100-150 ℃, and at the temperature, the regenerant of the embodiment can fully permeate into the waste rubber and relieve the decomposition of the rubber main chain, so that the mechanical property of an extruded product is ensured; in the reaction section 202, the temperature is controlled to be 150-250 ℃, and in the interval, the mass ratio is 100: 15, the waste rubber reacts with the regenerant quickly, the regenerant diffuses fully and breaks a cross-linking bond, the desulfurization reaction is carried out quickly, the desulfurization regeneration is finished in a short time, and the damage to the main chain of the rubber is reduced to the minimum; after the material enters the cooling section 203, the temperature of the cooling section is controlled to be 70-120 ℃, the material is uniformly cooled, and the material is prevented from being oxidized when being exported.

The method for regenerating rubber by the screw extruder in the embodiment is characterized in that when a material is just added into the machine barrel 200, the material is heated in the heating rod 30, the material is heated in the heating section 201 in the early stage, the temperature of the material is rapidly and uniformly raised, the material can reach the reaction temperature as early as possible on the premise that the performance is not affected, the material is heated in the reaction section 202 in the middle stage, the material is at the optimal sulfur-cut regeneration temperature through the heating rod 30 and the cooling liquid in the cooling liquid runner 4, the material is cooled in the cooling section 203 in the later stage, the temperature of the cooling water is controlled through the mold temperature machine, the material is uniformly and stably cooled, the situation that the material is rapidly cooled by sharp heat is avoided in the whole process, the performance of the material in the extrusion process is not affected and damaged to the greatest extent, and the comprehensive performance of the final regenerated product is.

The examples of the utility model are only right the utility model discloses a preferred embodiment describes, and not right the utility model discloses design and scope are injectd, do not deviate from the utility model discloses under the prerequisite of design idea, the field engineering technical personnel are right the utility model discloses a various deformation and improvement that technical scheme made all should fall into the protection scope of the utility model.

Claims

1. A screw extruder, comprising a screw extruder having,

a screw extruder body (1);

the device comprises a machine barrel (200), a heating section (201), a reaction section (202) and a cooling section (203), wherein the machine barrel (200) is formed by connecting barrel blocks (2) in sequence along the material extrusion direction;

the barrel block (2) is cuboid and is provided with a first end face (22a) and a second end face (22b) which are oppositely arranged and four side faces which connect the first end face (22a) with the second end face (22 b);

the barrel block (2) is provided with a material cylinder (20) which is a through hole formed by vertically penetrating from the first end surface (22a) to the second end surface (22b) and used for accommodating a screw of a screw extruder;

characterized in that, the barrel block (2) further comprises:

the mounting holes (21) are through holes vertically penetrating through opposite side surfaces of the barrel block (2), and the mounting holes (21) and the material cylinder (20) are arranged in a staggered mode;

a heating device (3) which is an electric heating element disposed in the mounting hole (21).

2. A screw extruder according to claim 1, wherein: the heating device (3) is a heating rod (30).

3. A screw extruder according to claim 1, wherein: the cylinder block (2) forming the reaction section (202) also comprises heat-insulating layers (5) which are formed on the four side surfaces of the cylinder block (2).

4. A screw extruder according to claim 3, wherein: and the cylinder block (2) forming the reaction section (202) is also provided with a cooling liquid flow channel (4) which is a through hole vertically penetrating from the first end face (22a) to the second end face (22b), and the cooling liquid flow channel (4), the mounting hole (21) and the material cylinder (20) are arranged in a staggered manner.

5. A screw extruder according to claim 1 or 4, wherein: and a cooling liquid flow channel (4) is also arranged on the cylinder block (2) forming the cooling section (203), and is a through hole vertically penetrating from the first end face (22a) to the second end face (22b), and the cooling liquid flow channel (4), the mounting hole (21) and the material cylinder (20) are arranged in a staggered manner.

6. A screw extruder according to claim 5, wherein: the cooling liquid flow channels (4) on the cylinder block (2) forming the reaction section (202) and the cooling section (203) respectively and independently operate.