CN217622079U - Conical double-machine barrel - Google Patents

Abstract

The application discloses a conical double-machine barrel, which comprises a barrel body with a feeding hole and a discharging hole, wherein two conical screw cavities communicated with the feeding hole and the discharging hole are arranged in the barrel body; the barrel is sequentially divided into a blanking area, an exhaust area and an extrusion area from front to back, a feed inlet is arranged in the blanking area and comprises a feed section and a transition section communicated with the feed section and a conical screw cavity, and the volume of the transition section is gradually increased from the feed section to the conical screw cavity; the surface of the cylinder body of the exhaust area is provided with a plurality of annular straight grooves, and the surface of the cylinder body of the extrusion area is provided with a cooling groove spirally extending from front to back. According to the screw rod feeding device, the material feeding amount of the screw rod is increased through the transition section with the volume gradually increasing from top to bottom in the feeding hole, the material returning of a bridge is avoided, and the conveying efficiency is improved; the cylinder body is provided with a plurality of annular straight grooves in the exhaust area to control the temperature of the exhaust area, so that the plasticizing effect of the material is prevented from being influenced by overhigh temperature; the barrel has seted up the cooling bath in the district of extruding, and is energy-efficient just can realize low temperature and extrude.

Description

Conical double-machine barrel

Technical Field

The application relates to the technical field of plastic extrusion equipment, in particular to a conical double-machine barrel.

Background

At present, the traditional conical double-barrel structure is easy to bridge when light calcium carbonate is added, the conveying efficiency is not high, the material is easily over-plasticized due to over-temperature, the plasticizing effect of the material is influenced, and the improvement on the extrusion yield is limited.

Disclosure of Invention

The purpose of this application is to solve the easy problem of bridging, easy super temperature plastify of unloading among the prior art.

In order to achieve the purpose, the following technical scheme is adopted in the application: a conical double-machine barrel comprises a barrel body with a feeding hole and a discharging hole, wherein two conical screw cavities communicated with the feeding hole and the discharging hole are arranged in the barrel body; the barrel is sequentially divided into a blanking area, an exhaust area and an extrusion area from front to back, the feed inlet is arranged in the blanking area and comprises a feed section and a transition section communicated with the feed section and the conical screw cavity, and the volume of the transition section is gradually increased from the feed section to the conical screw cavity; the surface of the cylinder body of the exhaust area is provided with a plurality of annular straight grooves, and the surface of the cylinder body of the extrusion area is provided with cooling grooves spirally extending from front to back.

In the above technical solution, it is further preferable that the transition section includes a first transition surface located at the rear side of the feed section, and a second transition surface and a third transition surface which are oppositely arranged left and right, the first transition surface is connected between the feed section and the conical screw cavity in a manner of extending backward, and a distance between the second transition surface and the third transition surface gradually increases from the feed section to the conical screw cavity.

In the above technical solution, it is further preferable that the exhaust area is provided with a pair of exhaust holes side by side, and the pair of exhaust holes corresponds to and communicates with the two conical screw cavities one to one.

In the above technical solution, it is further preferable that a distance between the pair of exhaust holes gradually increases from the surface of the cylinder to the conical screw cavity.

In the above technical solution, it is further preferable that the cylinder has a split structure in the blanking area, the cylinder includes a first split body and a second split body located at a rear side of the first split body, and a front end of the second split body is detachably connected to a rear end of the first split body.

Compared with the prior art, the application has the following beneficial effects:

the feed inlet comprises a transition section with the volume gradually increasing from top to bottom, the feed amount of the screw is increased through the transition section, the phenomenon of bridge returning of the feed inlet is avoided, the conveying is stable, and the conveying efficiency is improved; the surface of the exhaust area of the cylinder body is provided with a plurality of annular straight grooves for controlling the temperature of the exhaust area, so that the plasticizing effect of the material is prevented from being influenced by overhigh temperature of the exhaust area; the surface of the barrel in the extrusion area is provided with a cooling groove extending in a spiral mode, the copper pipe for conveying cooling media is wound on the cooling groove to control the temperature of the extrusion area, the efficiency is high, energy is saved, and low-temperature extrusion can be achieved.

Drawings

Fig. 1 is a schematic structural diagram of a conical twin-cylinder provided in an embodiment of the present application;

FIG. 2 isbase:Sub>A cross-sectional view taken along line A-A of FIG. 1;

FIG. 3 is a cross-sectional view taken along line B-B of FIG. 1;

fig. 4 is a sectional view taken along line C-C of fig. 1.

Wherein: 1. a barrel; 101. a first split body; 102. a second body; 11. a blanking area; 12. an exhaust area; 13. an extrusion zone; 2. a conical screw cavity; 3. a feed inlet; 31. a feeding section; 32. a transition section; 321. a first transition surface; 322. a second transition surface; 323. a third transition surface; 4. a discharge port; 5. an exhaust hole; 6. an annular straight groove; 7. and (6) cooling the tank.

Detailed Description

To explain the technical content, the structural features, the achieved objects and the functions of the application in detail, the technical solutions in the embodiments of the application will be described below with reference to the drawings in the embodiments of the application, and it is obvious that the described embodiments are only a part of the embodiments of the application, and not all embodiments. In the following description, for purposes of explanation, numerous specific details are set forth in order to provide a detailed description of various exemplary embodiments or implementations of the invention. However, various exemplary embodiments may be practiced without these specific details or with one or more equivalent arrangements. Moreover, the various exemplary embodiments may be different, but are not necessarily exclusive. For example, the particular shapes, configurations and characteristics of the exemplary embodiments may be used or implemented in another exemplary embodiment without departing from the inventive concept.

In the following, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless otherwise specified.

The terms "front", "back", "left" and "right" in the present application are according to the front, back, left and right as shown in fig. 1; the terms "up" and "down" in this application are according to the top and bottom as shown in FIG. 2.

In the present application, unless expressly stated or limited otherwise, the term "coupled" is to be construed broadly, e.g., "coupled" may be a fixed connection, a removable connection, or an integral part; may be directly connected or indirectly connected through an intermediate.

The embodiment of the application provides a two barrels of cones, this two barrels of cones extend along fore-and-aft direction, as shown in fig. 1, this barrel includes the barrel 1 that divides into unloading district 11, exhaust area 12 and extrusion zone 13 from preceding back in proper order, is provided with two conical screw chamber 2 that extend from preceding back in the barrel 1, and two conical screw chamber 2 communicate each other, and the diameter in each conical screw chamber 2 reduces from preceding back gradually.

As shown in fig. 1 and 2, the blanking area 11 of the cylinder 1 is designed to be a split, the cylinder 1 comprises a first split 101 and a second split 102, the front end of the second split 102 is detachably connected with the rear end of the first split 101, the split design is convenient for embedding a wear-resistant alloy bushing into the cylinder 1, or the drawing groove alloy is lengthened, so that the wear resistance of the cylinder can be greatly improved, and the service life of the cylinder can be prolonged.

The barrel body 1 is provided with a feed inlet 3 and a discharge outlet 4 which are communicated with the two conical screw cavities 2, the feed inlet 3 is arranged in the blanking area 11 and is arranged on the first split body 101 and is used for conveying materials to the conical screw cavities 2 from the outside; the discharge port 4 is arranged at the rear end part of the cylinder body 1, and materials are conveyed out of the machine cylinder through the discharge port 4 after being sheared, extruded and stirred by the screw rod in the cylinder body 1.

As shown in fig. 2 and 3, the feed port 3 includes a feed section 31 and a transition section 32, the transition section 32 is connected between the feed section 31 and the conical screw cavity 2, and the wall surface of the barrel 1 of the feed section 31 extends in the up-down direction; the volume of the transition section 32 gradually increases from top to bottom, the transition section 32 comprises a first transition surface 321, a second transition surface 322 and a third transition surface 323 which are opposite from left to right, the first transition surface 321 is positioned at the rear side of the feeding section 31, the first transition surface 321 gradually inclines towards the rear and the bottom and is transited from the feeding section 31 to the conical screw cavity 2, so that materials can be smoothly conveyed to the conical screw cavity 2 after entering the barrel body 1 from the feeding section 31, and conveying fluctuation is reduced. The distance between the second transition surface 322 and the third transition surface 323 gradually increases from top to bottom, the second transition surface 322 forms an included angle beta 1 of 10-30 degrees with the wall surface of the corresponding feeding section 31, and the third transition surface 323 forms an included angle beta 2 equal to the included angle beta 1 with the wall surface of the corresponding feeding section 31; the volume of the feed inlet 3 is gradually increased from top to bottom, the feeding amount of the machine barrel is increased, and the first transition surface 321, the second transition surface 322 and the third transition surface 323 of the feed inlet 3 are inclined, so that the materials are conveyed stably, the pressure fluctuation in the materials is reduced, and the bridging material returning phenomenon is avoided.

As shown in fig. 2 and 4, the exhaust area 12 is provided with a pair of exhaust holes 5 which are oppositely arranged left and right, the pair of exhaust holes 5 are opened on the second split body 102, and the pair of exhaust holes 5 correspond to and are communicated with the two conical screw cavities 2 one by one; when the screw in the conical screw cavity 2 stirs and extrudes the material, the gas generated in the material is discharged out of the machine barrel through the pair of exhaust holes 5. The distance between the pair of exhaust holes 5 is gradually increased from top to bottom, an included angle theta of 5 degrees to 10 degrees is formed between the pair of exhaust holes 5, the pair of exhaust holes 5 are respectively tangent to the inner edge of the barrel body 1, the exhaust holes 5 and the conical screw cavity 2 are in smooth transition, the exhaust effect is better, and the included angle design of the pair of exhaust holes 5 enables the material emission to be difficult during barrel production.

As shown in fig. 1 and 2, a plurality of annular straight grooves 6 are formed in the surface of an exhaust area 12 of a cylinder 1, and the plurality of annular straight grooves 6 are sequentially distributed from front to back, in the present application, a sealing sleeve (not shown in the figure) is sleeved on the outer surface of the exhaust area 12 of the cylinder 1, so that the plurality of annular straight grooves 6 and the sealing sleeve form an air duct for conveying cooling air flow, and the cooling air flow exchanges heat with the cylinder 1 in the annular straight grooves 6 to cool the exhaust area 12; the annular straight groove 6 arranged on the barrel 1 increases the cooling area and the air inlet volume, the temperature of the exhaust area 12 is controlled by the temperature of the cooling barrel 1, the heat generated by shearing friction of the screw is prevented from causing the exhaust area 12 to be over-temperature, and the decomposition of coke materials is prevented.

Barrel 1 has seted up cooling tank 7 on the surface of extruding district 13, and cooling tank 7 extends from preceding back spiral on barrel 1, and in this application, the winding has copper pipe (not shown in the figure) in cooling tank 7, leads to cooling medium such as oil or water in the copper pipe, and the temperature of control extrusion district 13 prevents to extrude district 13 overtemperature and causes the material burnt and turn yellow, and stable output is the material of melt form, is favorable to realizing low temperature and extrudes.

The feed inlet comprises a feed section and a transition section connected between the feed section and the conical screw cavity, the volume of the transition section is gradually increased from the feed section to the conical screw cavity, the feed intake of the screw is improved, the bridging material return phenomenon of the feed inlet is avoided, the conveying is stable, and the conveying efficiency is improved; the cylinder body is provided with a plurality of annular straight grooves on the surface of the exhaust area to control the temperature of the exhaust area, so that the plasticizing effect of materials is prevented from being influenced by overhigh temperature of the exhaust area; the surface of the barrel in the extrusion area is provided with a cooling groove extending in a spiral mode, the copper pipe for conveying cooling media is wound on the cooling groove to control the temperature of the extrusion area, the efficiency is high, energy is saved, and low-temperature extrusion can be achieved.

The foregoing shows and describes the general principles, essential features, and advantages of the application. It will be understood by those skilled in the art that the present application is not limited to the embodiments described above, which are included to illustrate the principles of the application and that various changes and modifications may be made without departing from the spirit and scope of the application, the scope of which is defined by the appended claims, specification and equivalents thereof.

Claims (5)

1. The cone double machine barrel is characterized by comprising a barrel body (1) with a feeding hole (3) and a discharging hole (4), wherein two cone screw cavities (2) communicated with the feeding hole (3) and the discharging hole (4) are arranged in the barrel body (1); the barrel (1) is sequentially divided into a blanking area (11), an exhaust area (12) and an extrusion area (13) from front to back, the feed inlet (3) is arranged in the blanking area (11), the feed inlet (3) comprises a feed section (31) and a transition section (32) communicating the feed section (31) with the conical screw cavity (2), and the volume of the transition section (32) is gradually increased from the feed section (31) to the conical screw cavity (2); the surface of the cylinder (1) of the exhaust area (12) is provided with a plurality of annular straight grooves (6), and the surface of the cylinder (1) of the extrusion area (13) is provided with cooling grooves (7) spirally extending from front to back.

2. A twin cone barrel according to claim 1 in which the transition section (32) comprises a first transition surface (321) at the rear of the feed section (31), a second transition surface (322) and a third transition surface (323) disposed opposite to each other, the first transition surface (321) being connected to the feed section (31) and the conical screw bore (2) in a manner extending rearwardly, the distance between the second transition surface (322) and the third transition surface (323) increasing from the feed section (31) to the conical screw bore (2).

3. A twin cone as defined in claim 1 in which said venting zone (12) is provided with a pair of vents (5) side by side, a pair of said vents (5) being in one-to-one correspondence and communication with two of said conical screw cavities (2).

4. A tapered twin barrel according to claim 3, characterised in that the distance between a pair of said venting holes (5) increases progressively from the surface of said barrel (1) to said tapered screw chamber (2).

5. The tapered twin-barrel according to claim 1, wherein the barrel (1) is of a split structure in the blanking zone (11), the barrel (1) comprises a first split body (101) and a second split body (102) located at the rear side of the first split body (101), and the front end of the second split body (102) is detachably connected to the rear end of the first split body (101).

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