CN221136845U - Plastic baking-free exhaust machine barrel - Google Patents

Abstract

The utility model provides a plastics exempt from to dry exhaust barrel, includes can stretch into the hollow barrel of exhaust screw rod, is provided with the feed inlet that can send into the material on the barrel lateral wall that is close to barrel feed end, is provided with the discharge gate on the terminal surface of barrel discharge end, is provided with the gas vent on the barrel lateral wall between feed inlet and discharge gate, the gas vent sets up in the position department that corresponds with the only connector of exhaust screw rod the preceding lateral wall of gas vent is provided with the holding material concave part eccentrically. The utility model has the advantages that: the exhaust port of the machine barrel corresponds to the only one connector, so that the overall processing difficulty is reduced; the material containing concave part can contain partial materials, prevent excessive materials from overflowing from the exhaust port, and the exhaust position has good anti-overflow effect. The exhaust screw inserted into the machine barrel only needs to be provided with one connector, and the tail extrusion section with the gradually increased rod body diameter is arranged at the rod body corresponding to the tail end of the exhaust section, so that the similar connector function is achieved, but the manufacturing difficulty is reduced.

Description

Plastic baking-free exhaust machine barrel

Technical Field

The utility model relates to the technical field of machine barrel manufacturing, in particular to a plastic baking-free exhaust machine barrel.

Background

The novel exhaust type screw machine barrel device is characterized in that the screw comprises a first metering section, a mixing section, an exhaust section and a second metering section which are sequentially arranged, the depth of a screw groove of the exhaust section is larger than that of the screw groove of the first metering section and that of the second metering section, the exhaust section is at least two groups of screw edges, the adjacent screw edges are identical in steering and pitch and are arranged in a mutually staggered mode, the tops of the screw edges are provided with notches, the adjacent notches are arranged in a spiral mode, water vapor can be separated from the melt due to instant pressure change after the melt enters the exhaust section, the water vapor in the screw groove can be rapidly and effectively discharged from an exhaust port of the machine barrel through the notches at the tops of the screw edges, and the quality of the product is improved. However, the barrel used in this device is only a straight opening at the vent, and the flash prevention effect is not ideal, so the structure of the device needs to be further improved.

Disclosure of Invention

The utility model aims to solve the technical problem of providing the plastic drying-free exhaust machine barrel with good material exhaust effect, reasonable structure and good anti-flash effect at the exhaust position.

The technical scheme adopted for solving the technical problems is as follows: this plastic exempts from exhaust barrel of stoving, including stretching into the hollow barrel of exhaust screw rod, be provided with the feed inlet that can send into the material on the barrel lateral wall that is close to barrel feed end, be provided with the discharge gate on the terminal surface of barrel discharge end, be provided with the gas vent on the barrel lateral wall between feed inlet and discharge gate, its characterized in that: the exhaust port is arranged at a position corresponding to the only one connector of the exhaust screw, and the front side wall of the exhaust port is eccentrically provided with a material containing concave part.

As an improvement, the cylinder may preferably be a direct-machined single cylinder structure.

As a refinement, a second receiving recess can preferably be provided eccentrically on the front side wall of the feed opening.

As an improvement, the exhaust screw inserted into the cylinder may preferably include a rod body and a screw edge disposed on the rod body, the screw edge includes a feeding section, a mixing section, and an exhaust section, a connector is disposed at a joint of the mixing section and the exhaust section, the diameter of the connector is larger than the diameter of the rod body at any position of the rod body provided with the screw edge, the rod body corresponding to the tail end of the exhaust section is provided with a tail extrusion section with gradually increased rod body diameter, the front section of the exhaust section is a double screw edge, the rear section of the exhaust section is a single screw edge, and the screw edge interval of the rear section of the exhaust section corresponding to the tail extrusion section is larger than the screw edge interval of the rear section of the exhaust section at other positions.

Further, the angle between the front side of the axial section of any screw flight of the exhaust section and the surface of the rod body may preferably be smaller than 90 °, and the angle between the rear side of the axial section of any screw flight of the exhaust section and the surface of the rod body may preferably be larger than 90 °. The included angle of the front side is an acute angle, so that the material propelling effect can be improved, the included angle of the rear side is an obtuse angle, the thickness of the root of the screw rib can be enhanced, and the service life of the screw rib can be prolonged.

Further improvements may be made in that the rib width of the rib corresponding to the tail extrusion section may preferably be greater than the rib width of the rib between the tail extrusion section and the connection head.

Further improved, the mixing section can be preferably a single screw rib, the mixing section comprises a first mixing section and a second mixing section, auxiliary screw ribs are further arranged on the surface of a rod body corresponding to the first mixing section, and the axial distance between the auxiliary screw ribs and the first mixing section screw ribs is gradually increased.

Further, the diameter of the rod body corresponding to the mixing section can be preferably gradually increased.

Further improvements may be made in that the flight width of the auxiliary flights may preferably be less than the flight width of a flight of the mixing.

Further improved, a baffle spiral groove can be preferably arranged on the rod body close to the feeding section. Prevent the material backward flow, it is safer to use.

Compared with the prior art, the utility model has the advantages that: the exhaust port of the machine barrel corresponds to the only one connector, so that the overall processing difficulty is reduced; the material containing concave part can contain partial materials, prevent excessive materials from overflowing from the exhaust port, and the exhaust position has good anti-overflow effect. The exhaust screw inserted into the machine barrel only needs to manufacture one connector, and the tail extrusion section with the gradually increased rod diameter is arranged at the rod body corresponding to the tail end of the exhaust section, so that the similar connector function is realized, but the manufacturing difficulty is reduced; the exhaust section front section between afterbody extrusion section and the connector is two screw edges, and the rear section is single screw edge, and the screw edge interval of the rear section of exhaust section that afterbody extrusion section corresponds is greater than the screw edge interval of the rear section of exhaust section of other positions, has increased the change of exhaust section screw edge, and the material can improve the turn over frequency of upper material and lower floor's material in screw edge change position, realizes intensive mixing, helps better exhaust gas, and the rear section position that afterbody extrusion section corresponds is because the longitudinal direction reduces so through increasing screw edge interval and has kept similar screw edge volume, keeps sufficient extrusion force to the material, helps better exhaust gas.

Drawings

FIG. 1 is a cross-sectional view of an embodiment of the present utility model taken along a plane of a central axis;

FIG. 2 is a cross-sectional view taken along line A-A of FIG. 1;

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

FIG. 4 is a schematic view of the structure of FIG. 1 after insertion of a vent screw;

FIG. 5 is a front elevational view of the vent screw shown in isolation in FIG. 4;

FIG. 6 is a cross-sectional view taken along line E-E of FIG. 5;

fig. 7 is an enlarged view of the portion I in fig. 5.

Detailed Description

The utility model is described in further detail below with reference to the embodiments of the drawings.

As shown in fig. 1 to 7, the plastic baking-free air exhaust barrel of the present embodiment includes a hollow barrel 2 capable of extending into an air exhaust screw, a feed inlet 21 capable of feeding materials is provided on a barrel side wall near a barrel feed end, a discharge port is provided on an end face of a barrel discharge end, and an air exhaust port 22 is provided on a barrel side wall between the feed inlet 21 and the discharge port, and is characterized in that: the exhaust port 22 is arranged at a position corresponding to the only one connector 11 of the exhaust screw, and a material containing concave part 221 is eccentrically arranged on the front side wall of the exhaust port 22. The cylinder 2 is a single cylinder structure formed by direct machining. A second receiving recess 211 is eccentrically provided on the front sidewall of the feed port 21.

The exhaust screw rod of inserting the barrel includes body of rod 1 and the spiral shell arris of setting on body of rod 1, the spiral shell arris includes feeding section A, mixing section B, exhaust section C, is provided with connector 11 in the junction of mixing section B and exhaust section C, and the connector diameter is greater than the body of rod diameter of body of rod 1 optional position that is provided with the spiral shell arris, and body of rod 1 that exhaust section tail end corresponds is provided with the afterbody extrusion section D that body of rod diameter increases gradually, and the anterior segment C1 of exhaust section is two spiral shell arris, and the rear segment C2 of exhaust section is single spiral shell arris, and the spiral shell arris interval K1 of the rear segment of the exhaust section that corresponds with afterbody extrusion section is greater than the spiral shell arris interval K2 of the rear segment of the exhaust section of other positions. The included angle a between the front side of the axial section of any screw edge of the exhaust section and the surface of the rod body is smaller than 90 degrees, and the included angle b between the rear side of the axial section of any screw edge of the exhaust section and the surface of the rod body is larger than 90 degrees. The width of the screw flight corresponding to the tail extrusion section D is greater than the screw flight width of the screw flight between the tail extrusion section D and the connection head 11.

The mixing section B is a single screw rib, the mixing section B comprises a first mixing section B1 and a second mixing section B2, an auxiliary screw rib 13 is further arranged on the surface of a rod body corresponding to the first mixing section B1, and the axial distance between the auxiliary screw rib 13 and the first mixing section screw rib 12 is gradually increased. The diameter of the rod body corresponding to the mixing section B is gradually increased. The width of the auxiliary screw flight 13 is smaller than the screw flight width of the screw flight 12 of the mixing section. A flow blocking spiral groove 14 is arranged on the rod body 1 close to the feeding section A.

Claims (10)

1. The utility model provides a plastics exempt from to dry exhaust barrel, includes can stretch into hollow barrel (2) of exhaust screw, is provided with feed inlet (21) that can send into the material on the barrel lateral wall that is close to barrel feed end, is provided with the discharge gate on the terminal surface of barrel discharge end, is provided with gas vent (22) on the barrel lateral wall between feed inlet (21) and discharge gate, its characterized in that: the exhaust port (22) is arranged at a position corresponding to the only one connector (11) of the exhaust screw, and a material containing concave part (221) is eccentrically arranged on the front side wall of the exhaust port (22).

2. The vented barrel of claim 1, wherein: the cylinder body (2) is of a single cylinder body structure which is directly processed and molded.

3. The vented barrel of claim 1, wherein: a second material containing concave part (211) is eccentrically arranged on the front side wall of the feeding hole (21).

4. A vented barrel as claimed in any one of claims 1 to 3, wherein: the exhaust screw rod of inserting the barrel includes body of rod (1) and sets up the spiral shell arris on body of rod (1), the spiral shell arris includes feed section (A), mixing section (B), exhaust section (C), be provided with connector (11) in the junction of mixing section (B) and exhaust section (C), the connector diameter is greater than the body of rod diameter of body of rod (1) optional position that is provided with the spiral shell arris, body of rod (1) that exhaust section tail end corresponds is provided with body of rod diameter increase's afterbody extrusion section (D), anterior segment (C1) of exhaust section is two spiral shell arris, posterior segment (C2) of exhaust section be single spiral shell arris, spiral shell arris interval (K1) of the posterior segment of exhaust section that corresponds with afterbody extrusion section is greater than spiral shell arris interval (K2) of the posterior segment of exhaust section of other positions.

5. The vented barrel of claim 4, wherein: the included angle (a) between the front side edge of the axial section of any screw edge of the exhaust section and the surface of the rod body is smaller than 90 degrees, and the included angle (b) between the rear side edge of the axial section of any screw edge of the exhaust section and the surface of the rod body is larger than 90 degrees.

6. The vented barrel of claim 4, wherein: the screw width of screw corresponding to the tail extrusion section (D) is larger than the screw width of screw between the tail extrusion section (D) and the connector (11).

7. The vented barrel of claim 4, wherein: the mixing section (B) is a single screw rib, the mixing section (B) comprises a first mixing section (B1) and a second mixing section (B2), an auxiliary screw rib (13) is further arranged on the surface of a rod body corresponding to the first mixing section (B1), and the axial distance between the auxiliary screw rib (13) and the first mixing section screw rib (12) is gradually increased.

8. The vented barrel of claim 4, wherein: the diameter of the rod body corresponding to the mixing section (B) is gradually increased.

9. The vented barrel of claim 4, wherein: the screw width of the auxiliary screw (13) is smaller than the screw width of a section of screw (12) for mixing.

10. The vented barrel of claim 4, wherein: a flow blocking spiral groove (14) is arranged on the rod body (1) close to the feeding section (A).