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CN-224210494-U - Rubber extruder head

CN224210494UCN 224210494 UCN224210494 UCN 224210494UCN-224210494-U

Abstract

The utility model discloses a rubber extruder head, which relates to the technical field of rubber production equipment and comprises a mounting block, a plurality of outlets and a flow dividing cone, wherein the outlets are annularly arranged on the mounting block, the flow dividing cone is fixedly arranged at the bottom of the mounting block and is a cone column body with a wide upper part and a narrow lower part. When the material flows in the guide groove, the S-shaped path changes the flow direction of the material, so that the material is fully mixed and disturbed, the flow velocity gradient is reduced, and the uneven shearing stress is reduced. And extruding the homogenized material from the delivery pipe to form a high-quality product. The design avoids surface defects such as weld marks, corrugations and the like through the S-shaped guide groove, improves appearance quality, ensures uniform shearing stress distribution, prevents materials from being over vulcanized or degraded, and improves mechanical properties such as tensile strength, ageing resistance and the like of products.

Inventors

  • ZHAO DANYAN

Assignees

  • 淮安市天懿环保科技有限公司

Dates

Publication Date
20260508
Application Date
20250530

Claims (8)

  1. 1. Rubber extruder aircraft nose, including installation piece (1), its characterized in that: A plurality of outlets (2) which are annularly arranged on the mounting block (1); the flow dividing cone (3) is fixedly arranged at the bottom of the mounting block (1), the flow dividing cone (3) is a cone column body with a wide upper part and a narrow lower part, a plurality of guide sheets (4) are arranged on the outer wall of the flow dividing cone (3), guide grooves (10) are formed between the adjacent guide sheets (4), the guide sheets (4) are arranged in an S shape, and the formed guide grooves (10) are also arranged in an S shape.
  2. 2. A rubber extruder head as in claim 1, wherein the guide piece (4) is progressively shallower in depth in the feed direction.
  3. 3. A rubber extruder head according to claim 2, characterized in that the outlets (2) are shaped as sectors, one guide groove (10) corresponding to each outlet (2).
  4. 4. A rubber extruder head as in claim 3, wherein the bottom of the mounting block (1) is fixedly provided with a shell (5), the shell (5) is in a shape of wide upper part and narrow lower part, the guide piece (4) is connected with the inner wall of the shell (5), and the bottom of the shell (5) is provided with a delivery tube (6).
  5. 5. A rubber extruder head as in claim 4, wherein a flange (8) is fixedly mounted on the top of the mounting block (1), and a plurality of bolts (9) are screwed to the bottom of the flange (8).
  6. 6. A rubber extruder head as in claim 5 wherein a rubber layer (7) is fixedly mounted on top of the flange (8), the height of the rubber layer (7) being greater than the flange (8).
  7. 7. A rubber extruder head as in claim 6, wherein the mounting block (1), flange (8), guide plate (4) and delivery tube (6) are all stainless steel.
  8. 8. A rubber extruder head as in claim 7 wherein the guide plate (4) and the guide groove (10) are provided with tungsten carbide wear-resistant coatings.

Description

Rubber extruder head Technical Field The utility model relates to the technical field of rubber production equipment, in particular to a rubber extruder head. Background Rubber extrusion molding is a key process for producing rubber products, and an extruder head is used as a molded core component to directly determine the state of a rubber material flow and the quality of products. However, the existing rubber extruder heads have significant defects in practical application, and are difficult to meet the production requirements of high-quality rubber products. Currently, most rubber extruder heads employ conventional straight barrel or simple taper structured runners. In the process that rubber materials enter the machine head from the screw rod, the flow of the materials is easily disturbed due to the mutation of the cross section of the flow channel. For example, when producing products such as rubber sealing strips with complex cross sections, tire treads and the like, materials flow through the area between the machine head diversion cone and the die orifice, the flow velocity in the central part is high, and the flow velocity of the materials close to the die wall is low due to high friction resistance, so that a large flow velocity gradient is formed. The uneven flow velocity causes uneven shearing stress distribution in the material, the appearance defects such as weld marks, ripples and the like appear on the surface of an extruded product if the flow velocity is light, the local material is excessively vulcanized or degraded if the flow velocity is heavy, and the key mechanical properties such as tensile strength, ageing resistance and the like of the product are greatly reduced. Disclosure of utility model The utility model aims to provide a rubber extruder head, which solves the problems in the prior art. The utility model provides a rubber extruder head which comprises a mounting block, a plurality of outlets and a flow dividing cone, wherein the outlets are annularly arranged on the mounting block, the flow dividing cone is fixedly arranged at the bottom of the mounting block, the flow dividing cone is a cone column body with wide upper part and narrow lower part, a plurality of guide sheets are arranged on the outer wall of the flow dividing cone, guide grooves are formed between adjacent guide sheets, the guide sheets are S-shaped, and the formed guide grooves are also S-shaped. Further, the depth of the guide piece gradually becomes shallower along the feeding direction. Further, the outlets are shaped like a fan, and each outlet corresponds to one guide groove. Further, the bottom of the installation block is fixedly provided with a shell, the shell is in a shape of being wide at the upper part and narrow at the lower part, the guide piece is connected with the inner wall of the shell, and the bottom of the shell is provided with a delivery pipe. Further, a flange is fixedly installed at the top of the installation block, and a plurality of bolts are connected to the bottom of the flange in a threaded mode. Further, a rubber layer is fixedly arranged at the top of the flange, and the height of the rubber layer is larger than that of the flange. Further, the mounting block, the flange, the guide piece and the delivery pipe are all made of stainless steel. Further, tungsten carbide wear-resistant coatings are arranged on the guide plates and the guide grooves. Compared with the prior art, the utility model has the beneficial effects that: 1. In the utility model, when rubber materials enter the extruder head from the screw rod, enter through the annular distributed outlets on the mounting block, contact the split cone and are guided to the S-shaped guide groove by the S-shaped guide piece on the outer wall of the split cone. When the material flows in the guide groove, the S-shaped path changes the flow direction of the material, so that the material is fully mixed and disturbed, the flow velocity gradient is reduced, and the uneven shearing stress is reduced. And extruding the homogenized material from the delivery pipe to form a high-quality product. The design avoids surface defects such as weld marks, corrugations and the like through the S-shaped guide groove, improves appearance quality, ensures uniform shearing stress distribution, prevents materials from being over vulcanized or degraded, and improves mechanical properties such as tensile strength, ageing resistance and the like of products. 2. According to the utility model, the depth of the guide plate gradually becomes shallow along the feeding direction, and the design can reasonably reduce the flow sectional area of the guide groove along the feeding direction according to the pressure change characteristic of the rubber material in the material flowing process, so that the flow velocity of the material is gradually improved, the pressure distribution of the material in the whole flow channel is ensured to be more uniform, and t