CN213166789U - Screw rod of rubber extruder and plasticizing device of rubber extruder - Google Patents

Abstract

The utility model provides a rubber extruder screw rod and rubber extruder plastify device belongs to rubber extrusion machinery technical field. The plasticizing device comprises a machine barrel, wherein a screw is arranged in the machine barrel; the screw comprises a feeding section, a plasticizing section and a conveying section; the outer side walls of the feeding section and the conveying section are both provided with conveying threads, and the outer side wall of the plasticizing section is provided with a plasticizing element; the plasticizing element comprises a mounting part and a dumbbell part, and the mounting part is an annular body arranged on the outer side wall of the plasticizing section at intervals; dumbbell portion includes the cylinder pole and is located the spheroid at cylinder pole both ends, and the middle part slope of cylinder pole is fixed on the installation department, be fixed with a plurality of dumbbell portions on the annular lateral wall of every installation department, and the dumbbell portion dislocation mounting on the adjacent installation department for look along the length direction of screw, all dumbbell portions are the heliciform and arrange. The utility model discloses a plasticizing device to the extruder carries out innovative design, improves the mixing ability and the plastify ability of rubber extruder, realizes extruding the equilibrium of output and plastify effect.

Description

Screw rod of rubber extruder and plasticizing device of rubber extruder

[ technical field ] A method for producing a semiconductor device

The utility model relates to a rubber extrusion machinery technical field, concretely relates to rubber extruder screw rod and rubber extruder plasticizing device.

[ background of the invention ]

In the existing single-screw rubber cold-feeding pin barrel extruder, rubber materials fed into the extruder are stirred, mixed, heated, plasticized and the like under the combined action of a screw, a barrel and pins, and finally are subjected to shaping extrusion through a machine head at a certain extrusion temperature. In the process, the extrusion capacity, the extrusion temperature and the plasticizing capacity are in a 'magic triangle' relationship with each other, and it is almost impossible to ensure that the three reach the optimal state at the same time.

The process target of the cold feeding extruder is to achieve the highest extrusion yield and the best plasticizing effect on the premise of controllable extrusion glue temperature. The basic design of a cold-feed extruder is to load an integral screw into a pin barrel having an inside diameter slightly larger than the outside diameter of the screw, with the primary extrusion processing zone of the compound being formed between the inside surface of the barrel and the outside surface of the screw. The material characteristics of the rubber material in the extrusion processing process are changed section by section, the rubber material can be divided into three areas of solid conveying, plasticizing and melting and melt conveying along the extrusion direction according to the change characteristics of the rubber material state, the three areas are also called as a feeding section, a plasticizing section and an extrusion section of the extruder, and different functional sections have different screw ridge structure designs and pin arrangement types. The rubber material in the feeding section is in a high elastic state, the rubber material in the plasticizing section is converted from the high elastic state to a viscous state, and the rubber material in the extruding section is in the viscous state. For the convenience of analytical research, the extrusion yield, plasticizing effect and extrusion gel temperature are defined as three factors of extrusion performance; the feeding, plasticizing and extruding are defined as three elements of extruding function, and the existing extruding mechanism which adopts the same barrel screw component combination to synchronously realize the three elements of feeding, plasticizing and extruding is vividly summarized into a three-section synchronous extruding mechanism of 1-1-1.

The current extrusion theory research and production practice prove that the three elements of the extrusion performance cannot reach an ideal high-effective value area simultaneously, if the extrusion yield is to be improved, the plasticizing effect must be reduced, and the temperature of the extruded glue is increased; in order to improve the plasticizing effect, it is necessary to reduce the extrusion gel temperature and the extrusion yield at the same time. The three parts present a magic triangle phenomenon of mutual restriction. Therefore, in the practice of extrusion production, only the temperature range of the extrusion glue permitted by the process can be selected to achieve the balance of extrusion yield and plasticizing effect. Therefore, the mixing capability and the plasticizing capability of the rubber extruder are improved, and the optimization of the working efficiency of the rubber extruder is the direction at present.

[ Utility model ] content

The invention of the utility model aims to: to the problem that exists, provide a rubber extruder screw rod and plasticizing device, the utility model discloses to the "devil triangle" defect that present single screw rod rubber cold feed pin barrel extruder exists, carry out the innovation reconsitution based on key element decoupling to current extrusion mechanism, effectively separate the plasticizing device and the extrusion device of rubber extruder, carry out the novelty design through the plasticizing device to the extruder, improve the mixing ability and the plasticizing ability of rubber extruder, realize extruding the equilibrium of output and plastify effect.

In order to realize the purpose, the utility model discloses a technical scheme as follows:

a screw rod of a rubber extruder comprises a feeding section, a plasticizing section and a conveying section which are sequentially arranged; the outer side walls of the feeding section and the conveying section are both provided with conveying threads, the plasticizing section is of a cylindrical structure, and the outer side wall of the plasticizing section is provided with a plasticizing element; the plasticizing element comprises an installation part and a dumbbell part, wherein the installation part is an annular body arranged on the outer side wall of the plasticizing section at intervals; a plurality of dumbbell parts are fixed on the annular outer side wall of each installation part, each dumbbell part comprises a columnar rod and two spheres, the columnar rods are fixed on the installation parts, and the two spheres are respectively located at two ends of the columnar rods.

The utility model discloses in, preferably, the middle part slope of column pole is fixed on the installation department, and the dumbbell portion dislocation installation on the adjacent installation department for look along the length direction of screw, all dumbbell portions are the heliciform and arrange.

In the present invention, preferably, the included angle between the central axis of the cylindrical rod and the central axis of the screw rod is 8 to 12 °.

The utility model discloses in, preferably, the column pole is the cylinder pole, and cylinder pole diameter is the 1/9 ~ 1/7 of plastify section surface working diameter, spheroid diameter is the 1/6 ~ 1/4 of plastify section surface working diameter, and the spheroid central distance at same cylinder pole two is 3/8 ~ 5/8 of plastify section surface working diameter.

In the utility model, preferably, the distance between the cylindrical rod and the plasticizing section is 1/32-3/32 of the working diameter of the outer surface of the plasticizing section, the mounting parts are arranged at equal intervals in the plasticizing section, and the distance between the adjacent mounting parts is 7/10-1 of the working diameter of the outer surface of the plasticizing section; the dumbbell parts on each mounting part on the same screw rod are the same in number.

In the utility model discloses, preferably, the length ratio of feeding section, plastify section and transport section is 1:1.5 ~ 2.5: 1.

The utility model discloses still provide the rubber extruder plasticizing device who utilizes above-mentioned screw rod, including the barrel, set up one or two levels side by side in the barrel the screw rod, the bearing frame rotation that all passes through bearing and the barrel tip outside at the both ends of screw rod is connected, and the wherein one end of screw rod is passed through power device drive rotation.

The utility model discloses in, preferably, when setting up two screws in the barrel, two screws are quick screw and slow screw respectively, adopt different power device to drive, align respectively between the feed section of two screws, between the plastify section and between the transport section, installation department on the quick screw plastify section is the same with the installation department one-to-one alignment total number on the slow screw plastify section, dumbbell portion quantity on every installation department is less than the dumbbell portion quantity on every installation department on the slow screw plastify section on the quick screw plastify section, and dumbbell portion on the quick screw plastify section meshes with the dumbbell portion on the slow screw plastify section.

In the utility model, preferably, the ratio of the number of the dumbbell parts on each installation part on the rapid screw plasticizing section to the number of the dumbbell parts on each installation part on the slow screw plasticizing section is 1:2, 1:3 or 1: 4.

The utility model discloses in, preferably, be equipped with screw thread opposite direction and intermeshing's transport screw thread in the feed section of quick screw rod and slow screw rod, the transport section of quick screw rod and the transport section of slow screw rod are equipped with screw thread opposite direction and intermeshing's transport screw thread.

To sum up, owing to adopted above-mentioned technical scheme, the beneficial effects of the utility model are that:

1. in the utility model, the screw comprises a feeding section, a plasticizing section and a conveying section which are arranged in sequence, the outer side walls of the feeding section and the conveying section are provided with conveying threads, and the function of the screw is focused on conveying sizing materials; the plasticizing section is in a cylindrical structure, the dumbbell-shaped plasticizing element is arranged on the outer side wall of the plasticizing section, and the function of the plasticizing section is mainly related to stirring, mixing and plasticizing.

2. The utility model discloses improve current pin formula into dumbbell formula structure, the spheroid at dumbbell formula structure both ends can be so that the contact surface of shearing is bigger, and the direction that sets up of column pole has changed the shearing direction of original pin mode, and each part shape and size of dumbbell formula structure is different, and these factors combined action have increased mixing, stirring and shearing action to improve the plastify effect. The dumbbell-shaped structures are arranged on the screw in a staggered mode, and the dumbbell parts are arranged in a spiral mode when viewed from the length direction of the screw, so that on one hand, the plasticizing device arranged in a spiral mode has plasticizing capacity, and meanwhile, the conveying effect is kept; on the other hand, the pin of the existing pin type structure is fixed on the inner wall of the machine barrel, the pin cannot rotate in the working process, and the rubber material is sheared and plasticized while flowing; and the utility model discloses well dumbbell structure fixes at the screw rod outer wall, can rotate along with the rotation of screw rod, has strengthened its stirring and the intensity of shearing to the sizing material, and this shearing action makes the sizing material in the barrel whole can both receive the effort, mixes the stirring and must be more even.

3. The utility model discloses an among the double screw extruder plasticizing device, with two screw rod parallel arrangement, dumbbell portion quantity in every installation department becomes the integral multiple relation with dumbbell portion quantity in every installation department in the quick screw rod plastify section on the slow screw rod plastify section, and form partial meshing between dumbbell column structure between the two, adjust the speed of two screw rods into the rotation speed of different multiples during the use, the difference through the rotation speed of two screw rods, adjust its dumbbell portion to the shearing efficiency of sizing material, make the inside rubber material of barrel receive the shearing action of two kinds of different degrees, reach the purpose of the shearing effect of adjustment and improvement sizing material, can make the plastify section have stronger mixture, stirring ability, thereby improve the mixing ability and the plastify ability of rubber extruder to the sizing material.

4. The utility model discloses when setting up the big-small proportion of each position of screw rod, through designing the interval isoparametric of distance, installation department between cylinder pole diameter, spheroid central distance, column pole and the plastify section, can gain the balance between compacter overall arrangement, lower material cost and more plastify effect, higher output.

[ description of the drawings ]

FIG. 1 is a front view of a screw of a rubber extruder provided by the present invention;

FIG. 2 is a perspective view of a screw of a rubber extruder provided by the present invention;

FIG. 3 is a functional schematic diagram of a plasticizing device of a rubber extruder provided by the present invention;

FIG. 4 is a view of FIG. 3 taken along A-A;

FIG. 5 is a view of FIG. 3 taken along the direction B-B;

FIG. 6 is a view of FIG. 5 in the direction C-C;

fig. 7 is a view in the direction D-D of fig. 5.

FIG. 8 is a view of two screws used in pairs;

fig. 9 is a sectional view taken in the direction of E-E in fig. 8.

Wherein, 10-fast screw, 11-feeding section, 12-plasticizing section, 121-mounting section, 122-cylindrical rod, 123-sphere, 13-conveying section, 20-slow screw, 21-feeding section, 22-plasticizing section, 221-mounting section, 222-cylindrical rod, 223-sphere; 23-conveying section, 30-feeding end bearing block, 40-barrel, 401-feeding port, 402-discharging port, 50-discharging end bearing, 60-bearing I, 70-bearing II and 80-bearing III.

[ detailed description ] embodiments

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. The accompanying drawings are only for illustrative purposes and are only schematic drawings rather than actual drawings, which are not intended to limit the present disclosure, and in order to better illustrate the embodiments of the present disclosure, some components of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product.

In the description of the present invention, it should be further noted that, unless otherwise explicitly stated or limited, the terms "disposed" and "connected" are to be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

The utility model discloses an improve current extrusion screw to optimize "magic triangle" relation between "feed, plastify, extrude" function three key elements, improve the mixing ability and the plastify ability of rubber extruder, realize extruding the equilibrium of output and plastify effect. In the present embodiment, firstly, an improved screw for a rubber extruder is proposed, referring to fig. 1 and 2, the screw comprises a feeding section 11, a plasticizing section 12 and a conveying section 13 which are arranged in sequence, and the screw is integrally formed, but the function and structure of each part are different; the outer side walls of the feeding section 11 and the conveying section 13 are both provided with conveying threads for conveying rubber materials, the plasticizing section 12 is of a cylindrical structure and is greatly different from the existing screw-type structure, and the outer side wall of the plasticizing section 12 is provided with a plasticizing element; the plasticizing element comprises a mounting part 121 and a dumbbell part, wherein the mounting part 121 is an annular body arranged on the outer side wall of the plasticizing section 12 at intervals and used for mounting and fixing the dumbbell part, and the dumbbell part can be fixed with the outer side wall of the plasticizing section 12 in a welding mode; dumbbell portion includes cylindrical pole 122 and the spheroid 123 that is located cylindrical pole 122 both ends, the middle part slope of cylindrical pole 122 is fixed on installation department 121, preferably fix through the welded mode, and the contained angle between the central axis of preferred cylindrical pole 122 and the central axis of screw rod is 8-12, more preferably 10, be fixed with a plurality of dumbbell portions on the annular lateral wall of every installation department 121, dumbbell portion number can be two or more, and the installation of dumbbell portion dislocation on the adjacent installation department 121, make along the length direction of screw rod see, all dumbbell portions are the heliciform and arrange. The utility model discloses improve current pin formula into dumbbell formula structure, the spheroid at both ends can be so that the contact surface of shearing is bigger, and the column pole 122 set up the shearing direction that the direction changed original mode, and each part shape and size of dumbbell formula structure is different, and these factors combined action have increased mix, stirring and shearing action to improve the plastify effect. The slope setting of column pole 122 for a plurality of dumbbell portions are the heliciform at the length of screw and arrange, thereby make the utility model discloses a plastify section has the effect of transported substance material simultaneously, can also help the plastify of rubber material.

The utility model discloses a screw rod is when concrete implementation, and the technical staff in the field can carry out specific size according to the design specification and set for, as long as accord with aforementioned technical characteristic then all the utility model discloses an within the protection scope, however, in order to gain more compact overall arrangement, lower material cost and more plastify effect, the balance between the higher output, the utility model discloses still make parameter optimization, specifically can, column pole 122 can be cylinder pole or square column pole, now explains specific design with the cylinder pole, and cylinder pole diameter is the 1/9 ~ 1/7 of plastify section 12 surface working diameter, preferably 1/8. The diameter of the sphere 123 is 1/6-1/4, preferably 1/5, of the working diameter of the outer surface of the plasticizing section 12. The distance between the centers of the spheres 123 at the two ends of the same cylindrical rod 122 is 3/8-5/8, preferably 1/2, of the working diameter of the outer surface of the plasticizing section 12. The distance between the cylindrical rod 122 and the plasticizing section 12 is 1/32-3/32, preferably 1/16, of the working diameter of the outer surface of the plasticizing section 12. The installation parts 121 are arranged at equal intervals in the plasticizing section, and the distance between the adjacent installation parts 121 is 7/10-1, preferably 4/5, of the working diameter of the outer surface of the plasticizing section 12. The length ratio of the feeding section 11, the plasticizing section 12 and the conveying section 13 is 1: 1.5-2.5: 1, and preferably 1:2: 1. The relationship between the above dimensions is a preferable reference value in design, and in practical implementation, a person skilled in the art can optimize the above parameters in any combination, and the invention is within the protection scope of the present invention.

The utility model provides an among the embodiment, still be applied to the plasticizing device of rubber extruder with above-mentioned screw rod to realize its plastify function of extruding. The plasticizing device of the rubber extruder comprises a cylinder 40, one screw or two screws 10 arranged horizontally side by side can be arranged in the cylinder 40, see fig. 5, both ends of the screw 10 are rotatably connected with feeding bearing seats (30,50) outside both ends of the cylinder 40 through bearings, and one end of the screw 10 is driven to rotate through a power device (not shown). When the plasticizing device is designed as a twin-screw type plasticizing device, the two screws may be identical or may have different structures. The barrel 40 has a feed port 401 at the top side and a discharge port 402 at the bottom side. The feed port 401 is located above the screw feeding section 11 and the discharge port 402 is located below the screw conveying section 13.

In another preferred embodiment, two screws, namely a fast screw 10 and a slow screw 20, are arranged in the barrel 40, and referring to fig. 3-7, the positional relationship and identity between the fast screw 10 and the slow screw 20 are that the feeding sections (11, 21), the plasticizing sections (12, 22) and the conveying sections (13, 23) of the fast screw 10 and the slow screw 20 are respectively aligned, the mounting portions 121 on the plasticizing section 12 of the fast screw 10 and the mounting portions 221 on the plasticizing section 22 of the slow screw 20 are aligned one by one, one ends of the fast screw 10 and the slow screw 20 close to the feeding sections (11, 21) are rotatably mounted in the feeding end bearing block 30 through a second bearing 70 and a third bearing 80, the end protrudes out of the feeding end bearing seat 30, the outer side surface of the protruding part is provided with a spline groove for connecting an external reduction gearbox and a driving motor, and the feeding end bearing seat 30 can be fixed on the outer side wall of one end of the machine barrel 40 through a bolt. One ends of the fast screw 10 and the slow screw 20 close to the conveying sections (13, 23) are rotatably connected with the discharge end bearing seat 50 through a bearing I60. In this embodiment, the feed port 401 is located above the feed section 11 of the fast screw 10 and the feed section 21 of the slow screw 20; the discharge port 402 is located below the conveying sections 13 and 23 of the fast and slow screws 10 and 20. In addition, the two screws have some structural differences, which are shown in the difference that one of the two screws is a fast screw 10 and a slow screw 20, which are driven by different power devices, when the fast screw 10 and the slow screw 20 rotate at different rotating speeds, the plasticizing elements of the fast screw 10 and the slow screw 20 are partially meshed, so that the plasticizing elements of the plasticizing sections (12, 22) can have strong mixing and stirring capabilities, and the mixing capability and the plasticizing capability of the rubber extruder are improved. The two differences are that the number of the dumbbell parts on each mounting part 121 on the plasticizing section 12 of the fast screw 10 is less than that of the dumbbell parts on each mounting part 221 on the plasticizing section 22 of the slow screw 20. And preferably, the ratio of the number of dumbbells per mounting section 121 on the plasticizing section 12 of the fast screw 10 to the number of dumbbells per mounting section 221 on the plasticizing section 22 of the slow screw 20 is 1:2, 1:3, or 1: 4. The shearing efficiency of the dumbbell part of the machine barrel to the rubber material is adjusted through the difference of the rotating speeds of the two screws and the difference of the dumbbell part quantity, so that the rubber material in the machine barrel is subjected to the shearing action of two different degrees, the purpose of adjusting and improving the shearing effect of the rubber material is achieved, the plasticizing section can have stronger mixing and stirring capacity, and the mixing capacity and the plasticizing capacity of the rubber extruder to the rubber material are improved.

Referring to fig. 8 and 9, the feeding section 11 of the fast screw 10 and the feeding section 21 of the slow screw 20 are provided with conveying threads with opposite thread directions and meshed with each other, and the conveying section 13 of the fast screw 10 and the conveying section 23 of the slow screw 20 are provided with conveying threads with opposite thread directions and meshed with each other, so that the conveying capacity and the conveying stability are improved.

The above description is for the detailed description of the preferred possible embodiments of the present invention, but the embodiments are not intended to limit the scope of the present invention, and all equivalent changes or modifications accomplished under the technical spirit suggested by the present invention should fall within the scope of the present invention.

Claims (10)

1. The utility model provides a rubber extruder screw rod which characterized in that: the screw comprises a feeding section, a plasticizing section and a conveying section which are sequentially arranged; the outer side walls of the feeding section and the conveying section are both provided with conveying threads, the plasticizing section is of a cylindrical structure, and the outer side wall of the plasticizing section is provided with a plasticizing element; the plasticizing element comprises an installation part and a dumbbell part, wherein the installation part is an annular body arranged on the outer side wall of the plasticizing section at intervals; a plurality of dumbbell parts are fixed on the annular outer side wall of each installation part, each dumbbell part comprises a columnar rod and two spheres, the columnar rods are fixed on the installation parts, and the two spheres are respectively located at two ends of the columnar rods.

2. The screw of the rubber extruder of claim 1, wherein: the middle part of the columnar rod is obliquely fixed on the installation part, and the dumbbell parts on the adjacent installation parts are installed in a staggered mode, so that all the dumbbell parts are arranged in a spiral shape when seen along the length direction of the screw rod.

3. The screw of the rubber extruder of claim 2, wherein: the included angle between the central axis of the columnar rod and the central axis of the screw is 8-12 degrees.

4. A rubber extruder screw according to claim 2 or 3, wherein: the cylindrical rod is a cylindrical rod, the diameter of the cylindrical rod is 1/9-1/7 of the working diameter of the outer surface of the plasticizing section, the diameter of the sphere is 1/6-1/4 of the working diameter of the outer surface of the plasticizing section, and the distance between the centers of the spheres at two ends of the same cylindrical rod is 3/8-5/8 of the working diameter of the outer surface of the plasticizing section.

5. A rubber extruder screw according to claim 2 or 3, wherein: the distance between the columnar rod and the plasticizing section is 1/32-3/32 of the working diameter of the outer surface of the plasticizing section, the mounting parts are arranged at equal intervals in the plasticizing section, and the distance between every two adjacent mounting parts is 7/10-1 of the working diameter of the outer surface of the plasticizing section; the dumbbell parts on each mounting part on the same screw rod are the same in number.

6. A rubber extruder screw according to claim 1, wherein: the length ratio of the feeding section to the plasticizing section to the conveying section is 1: 1.5-2.5: 1.

7. The utility model provides a rubber extruder plasticizing device which characterized in that: the rubber extruder screw of any one of claims 1-6, which comprises a barrel, wherein one or two screws are horizontally arranged side by side in the barrel, two ends of each screw are rotatably connected with bearing seats outside the end part of the barrel through bearings, and one end of each screw is driven to rotate through a power device.

8. The plasticizing apparatus of a rubber extruder as set forth in claim 7, wherein: when two screws are arranged in the machine barrel, the two screws are respectively a fast screw and a slow screw and are driven by different power devices, the feeding sections, the plasticizing sections and the conveying sections of the two screws are respectively aligned, the mounting parts on the plasticizing sections of the fast screws and the mounting parts on the plasticizing sections of the slow screws are aligned one by one, the total number of the mounting parts is the same, and the number of the dumbbell parts on each mounting part on the plasticizing section of the fast screws is less than that of the dumbbell parts on each mounting part on the plasticizing section of the slow screws; a feed inlet is formed in one side of the top of the machine barrel, a discharge outlet is formed in one side of the bottom of the machine barrel, and the feed inlet is positioned above the quick screw feeding section and the slow screw feeding section; and the discharge port is positioned below the quick screw conveying section and the slow screw conveying section.

9. The plasticizing apparatus of a rubber extruder as set forth in claim 8, wherein: the ratio of the number of dumbbell parts on each mounting part on the rapid screw plasticizing section to the number of dumbbell parts on each mounting part on the slow screw plasticizing section is 1:2, 1:3 or 1: 4.

10. The plasticizing apparatus of a rubber extruder as set forth in claim 8, wherein: the feeding section of the rapid screw and the feeding section of the slow screw are provided with conveying threads which are opposite in thread direction and mutually meshed, and the conveying section of the rapid screw and the conveying section of the slow screw are provided with conveying threads which are opposite in thread direction and mutually meshed.

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