Stepped twin-screw extrusion device and bulking machine

A twin-screw extrusion and stepped technology, which is applied in the field of stepped twin-screw extrusion devices and extruders, can solve the problems of high pressure on the extruder template, uneven quality of extruded materials, and poor material maturity. Achieve good kneading effect, good product stability, and small current fluctuation

CN107969725APending Publication Date: 2018-05-01嘉兴润阳机械有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2018-05-01

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Abstract

The invention discloses a stepped twin-screw extrusion device and a bulking machine which comprises twin screws arranged in parallel, wherein screw configuration of the twin screws adopts a stepped variable pitch double-threaded screw structure; and the twin screws comprise a 2-time screw diameter coarse pitch double-threaded screw structure, a three-forward kneading block, a 1.5-time twin-screw structure, a primary three-forward three-backward kneading block, a one-time twin-screw structure, a secondary three-forward three-backward kneading block, a primary one-time slotted twin-screw structure, a double-threaded inverted screw structure, a secondary one-time slotted twin-screw structure and a discharging conical screw structure which are connected in sequence from a feeding hole in the front end of the screw to a discharging hole. According to the stepped twin-screw extrusion device and the bulking machine, retention time of materials in a chamber of the bulking machine is long, thekneading effect is excellent, the pressure in the chamber is uniform, the product stability is high, discharging uniformity is realized, the product is uniform in material form and excellent in kneading effect, the material curing degree is excellent, and the machine is suitable for producing high-oil low-starch (with starch content of 10% or less) high-grade floating and sinking feed.
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Description

technical field

[0001] The invention relates to the technical field of extruders, in particular to a stepped twin-screw extruder and an extruder. Background technique

[0002] Traditional twin-shaft extruders use double the diameter of the screw, that is, double the pitch. The screw pitch of the extruder is set at the same pitch so that the material enters and exits in the same state, and the mold output uniformity of the extruder is affected by the modulus at the outlet of the extruder. And pressure, due to the reduction of the outlet, the reduction of the number of holes and the greater pressure on the template will cause the load of the host to be too high, which will affect the service life of the host and the quality of the extruded material. Moreover, the current of the traditional spiral configuration is high, the material maturity is not good, and the production capacity is not high.

[0003] Chinese patent literature (announcement date: June 27, 2017, announcement ...

Examples

Embodiment 1

[0039] exist figure 1 In the shown embodiment, a stepped twin-screw extrusion device includes twin-screws 1 arranged in parallel. The helical configuration of the twin-screws 1 adopts a stepped variable-pitch double-headed helical structure, and the twin-screws 1 include feeding from the front end of the screw. The mouth is connected to the discharge port in sequence with double-headed helical structure with 2 times the helix diameter and large pitch 2, three positive kneading blocks 3, 1.5 times double helix structure 4, one-level three positive and three reverse kneading blocks 5, 1 times double helix Structure 6, two-stage three-positive three-reverse kneading block 7, one-stage 1-time slotted double helix structure 8, double-headed anti-helix structure 9, two-stage 1-times slotted double helix structure 10, and discharge cone helix structure 11.

[0040] 2 times the helix diameter and large pitch double-ended helix structure 2, the helix pitch is equal to 2 times the helix...