CN103029285A

CN103029285A - Extruder

Info

Publication number: CN103029285A
Application number: CN2012105969205A
Authority: CN
Inventors: 袁能军
Original assignee: ZHEJIANG DONGBIN RUBBER MACHINERY SCREW CO Ltd
Current assignee: Zhejiang Dong Bin rubber and plastic screw Co., Ltd.
Priority date: 2012-12-31
Filing date: 2012-12-31
Publication date: 2013-04-10
Anticipated expiration: 2032-12-31
Also published as: CN103029285B

Abstract

The invention discloses an extruder which comprises an extruder barrel (1), a threaded rod (2) and a transmission device (7), wherein the transmission device (7) is in linkage with an output shaft of a motor (6); a material inlet and a material outlet are formed in the extruder barrel (1); and the threaded rod (2) is rotationally arranged in an inner cavity of the extruder barrel (1) and divided into a material inlet section (A), a fusion section (B), a plastification section (C) and an extrusion section (D). The extruder is characterized in that an extraction opening (11) is formed vertically in the extruder barrel (1); the extraction opening (11) is a through hole which has a small diameter at the lower part and a large diameter at the upper part; and a sunk part (31) capable of enlarging the inner cavity of the extruder barrel is arranged on an internal wall on the left side of the extraction opening (11) of the extruder barrel (1). According to the extruder, the extraction opening is rational in design; the problem of glue outflow due to vacuumizing in processes of extruding dehydration and expansion drying is solved effectively; and the extruder is very convenient to operate and use; the quality and grade of a product is improved and raised; and the production efficiency and the profit are improved and increased largely.

Description

Extruder

Technical field

The present invention relates to the processing of high molecular material field of mechanical technique, especially refer to a kind of extruder for rubber extruding.

Background technology

Extruder is used for multiple particulate material is fully mixed the rear also output of extruding, mainly is used in plastics or rubber and makes the field.In the rubber manufacture process, especially in last handling process, must carry out extrusion dehydration, expansion drying operation, need in extrusion, draw sky, extract moisture and bubble out, if these moisture and bubble are not discharged, allow it stay in the rubber and can produce more serious harmful effect to the rubber final products, all exhaust apparatus can be set in the present Rubber Extruder for this reason.But extruder pressure in the wearing layer in mixing plasticizing process is larger, and the glue phenomenon often can appear emitting in exhaust apparatus in exhaust, not only cause the waste of raw material, also affects the quality of product.Especially large-scale extruder, at present domestic do not have one can intactly solve the problem of emitting glue, and rubber mixes the equipment of doing heat-insulation foam material with plastics all be need to be from external import, and price comparison is expensive.For this reason, the existing patent No. is 201120264989.9 and is called that the Chinese utility model patent of " a kind of exhaust apparatus of Rubber Extruder " discloses a kind of structure, its structure comprise hollow wearing layer and with the fixedly sleeved stay pipe together of wearing layer outer surface, the sidewall of wearing layer is provided with the aspirating hole that runs through simultaneously stay pipe, the madial wall of described wearing layer is provided with pit, and described aspirating hole communicates with pit.This extruder is because the madial wall of wearing layer is provided with the pit of crescent moon shape, and the location bias of aspirating hole so that exhaust apparatus both can fully be discharged air, can reduce the generation of emitting the glue phenomenon again like this at the edge of pit low-pressure area.But the aspirating hole diameter of this structure is less, and the location bias of aspirating hole is unfavorable for the discharge of gas at the edge of pit low-pressure area, and to emitting the glue phenomenon to solve thoroughly.Therefore need to structurally improve, to avoid the generation of emitting the glue phenomenon of extruder, guarantee constant product quality.

Summary of the invention

Technical problem to be solved by this invention is to provide a kind of rational in infrastructure, easily extruder of bleeding for the above-mentioned state of the art, improved by the pit to aspirating hole and wearing layer, effectively solved and emitted the glue phenomenon when bleeding, greatly improved product quality and production efficiency.

The present invention solves the problems of the technologies described above the technical scheme that adopts: a kind of extruder, comprise machine barrel, screw rod and transmission device, the output shaft of described transmission device and motor links, described machine barrel is provided with charging aperture and discharging opening, described screw rod can be arranged in the inner chamber of machine barrel rotationally, and is divided into successively feed zone, melt zone, fluxing zone and extruding zone; It is characterized in that: vertically be provided with bleeding point on the described machine barrel, described bleeding point is the large through hole in aperture, little top, aperture, bottom, and the inner left wall at the bleeding point place that is positioned at described machine barrel arranges the depressed part of energy enlarger tube inner chamber.

As improvement, the radial section of described depressed part is oblique cambered surface, and the oblique cambered surface of described depressed part begins to be from dark gradually shallow involute structure from described bleeding point.

As improvement, the inwall of described machine barrel is provided with wearing layer, and described depressed part is positioned on the inboard of described wearing layer, and the part of the small-bore, bottom of described bleeding point is arranged on the described wearing layer corresponding to the depressed part edge.

As improvement, described screw rod is that feed zone one end diameter is large, the little structure of fluxing zone one end diameter.

Improve, described bleeding point is positioned on the fluxing zone again.

Improve, described screw rod is provided with the damping section in the position that is positioned on the fluxing zone again, and described depressed part is arranged in the machine letter in damping section the place ahead.

Further improve, the top corresponding to described bleeding point on the described machine barrel is provided with air extractor.

At last, the vertical central axis of described bleeding point is positioned on the side of longitudinal center's axis of described machine barrel.

Compared with prior art, the invention has the advantages that: bleeding point is designed to the large through hole in aperture, little top, aperture, bottom, the aperture is arranged on the wearing layer under its middle and lower part, so that gas can be extracted out from bleeding point, when extracting out, gas avoided rubber from bleeding point, to emerge like this, solved in extrusion dehydration, the expansion drying operation owing to what draw that sky produces and emitted the glue phenomenon, guaranteed the quality of product and carrying out smoothly of production.The present invention is rational in infrastructure, operation is very easy to use, has not only solved and has emitted the glue phenomenon, has also saved cost, has improved product quality and class, has greatly improved production efficiency and profit simultaneously.

Description of drawings

Fig. 1 is the structure cutaway view of the section of bleeding of extruder of the present invention;

Fig. 2 is that Fig. 1 is along the cutaway view of A-A line;

Fig. 3 is the overall structure schematic diagram of extruder of the present invention.

The specific embodiment

Embodiment is described in further detail the present invention below in conjunction with accompanying drawing.

As shown in the figure, a kind of extruder, comprise machine barrel 1, screw rod 2 and transmission device 7, transmission device 7 links with the output shaft of motor 6, rotate with drive screw 2, described machine barrel 1 is provided with charging aperture and discharging opening, and described screw rod 2 can be arranged in the inner chamber of machine barrel 1 rotationally, and is divided into successively feed zone A, melt zone B, fluxing zone C and extruding zone D; Vertically be provided with bleeding point 11 on the described machine barrel 1, described bleeding point 11 is the large through hole in aperture, little top, aperture, bottom, and the vertical central axis 8 of described bleeding point 11 is positioned on the side of longitudinal center's axis 9 of described machine barrel 1; The inwall of described machine barrel 1 is provided with wearing layer 3, is provided with the depressed part 31 that radial section is oblique cambered surface on the inwall of wearing layer 3; The part of the small-bore, bottom 111 of described bleeding point 11 is arranged on the described wearing layer 3 corresponding to depressed part 31 edges,

The oblique cambered surface of described depressed part 31 begins to be from dark gradually shallow involute structure from described bleeding point 11; It is large that described screw rod 2 is feed zone A one end diameter, the little structure of fluxing zone C one end diameter, described screw rod 2 is provided with damping section 21 in the position that is positioned on the fluxing zone C, described depressed part 31 is arranged on the wearing layer 3 in damping section 21 the place aheads, described bleeding point 11 is positioned on the fluxing zone C, top corresponding to described bleeding point 11 on the described machine barrel 1 is provided with air extractor, described air extractor comprises aiutage 4 and the exhaust cap 5 of hollow, described aiutage 4 is coaxial setting with described bleeding point 11, the internal diameter of described aiutage 4 is greater than the diameter of bleeding point 11, the sidewall of described aiutage 4 is provided with aspirating hole 41, so just can draw sky from equipment such as aspirating hole 41 connection vavuum pumps, because bleeding point 11 is the large structure in aperture, little top, aperture, bottom, so that gas has avoided rubber to emerge from aspirating hole 41 when extracting out, solved extrusion dehydration, emit the glue phenomenon owing to what draw that sky produces in the expansion drying operation, guaranteed the quality of product, improve product percent of pass, increased considerably enterprise profit.

Claims

1. extruder, comprise machine barrel (1), screw rod (2) and transmission device (7), described transmission device (7) links with the output shaft of motor (6), described machine barrel (1) is provided with charging aperture and discharging opening, described screw rod (2) can be arranged in the inner chamber of machine barrel (1) rotationally, and is divided into successively feed zone (A), melt zone (B), fluxing zone (C) and extruding zone (D); It is characterized in that: vertically be provided with bleeding point (11) on the described machine barrel (1), described bleeding point (11) is the large through hole in aperture, little top, aperture, bottom, the inner left wall of locating at the bleeding point that is positioned at described machine barrel (1) (11) arrange can the enlarger tube inner chamber depressed part (31).

2. extruder according to claim 1, it is characterized in that: the radial section of described depressed part (31) is oblique cambered surface, and the oblique cambered surface of described depressed part (31) begins to be from dark gradually shallow involute structure from described bleeding point (11).

3. extruder according to claim 2, it is characterized in that: the inwall of described machine barrel (1) is provided with wearing layer (3), described depressed part (31) is positioned on the inboard of described wearing layer (3), and it is upper corresponding to depressed part (31) edge that the part of the small-bore, bottom (111) of described bleeding point (11) is arranged at described wearing layer (3).

4. according to claim 1 and 2 or 3 described extruders, it is characterized in that: it is large that described screw rod (2) is feed zone (A) end diameter, the little structure of fluxing zone (C) end diameter.

5. according to claim 1 and 2 or 3 described extruders, it is characterized in that: described bleeding point (11) is positioned on the fluxing zone (C).

6. extruder according to claim 4, it is characterized in that: described screw rod (2) is provided with damping section (21) in the position that is positioned on the fluxing zone (C), and described depressed part (31) is arranged on the machine barrel (1) in damping section (21) the place ahead.

7. according to claim 1 to the described extruder of 3 arbitrary claims, it is characterized in that: the upper top corresponding to described bleeding point (11) of described machine barrel (1) is provided with air extractor.

8. according to claim 1 to the described extruder of 3 arbitrary claims, it is characterized in that: the vertical central axis (8) of described bleeding point (11) is positioned on the side of longitudinal center's axis (9) of described machine barrel (1).