Strand pelletizer and method for adjusting the cutting gap of such a pelletizer

Patent metadata

Field	Value
Publication number	US-12377580-B2
Application number	US-201917426060-A
Country	US
Kind code	B2
Filing date	Aug 26, 2019
Priority date	Jan 29, 2019
Publication date	Aug 5, 2025
Grant date	Aug 5, 2025

Abstract

A strand pelletizer for pelletizing a strand of material comprises at least one cutting edge and an opposite cutting edge. The opposite cutting edge is arranged on a base body which is displaceable relative to a support body. The base body is independently displaceable in a linear manner relative to the support body and pivotable about at least one pivot axis. The strand pelletizer enables simple and precise adjustment of the opposite cutting edge and an associated cutting gap.

First claim

The invention claimed is:

1. A strand pelletizer for pelletizing a strand of material with
at least one cutting edge,
an opposite cutting edge, wherein
the opposite cutting edge is arranged on a base body and
the base body is linearly displaceable relative to a support body for adjusting the opposite cutting edge,

a feeding device for feeding a material strand into a cutting gap between the at least one cutting edge and the opposite cutting edge,
a first adjustment screw and a first pin which forms a first pivot axis and is displaceable by means of the first adjustment screw,
a second adjustment screw and a second pin which forms a second pivot axis and is displaceable by means of the second adjustment screw,

wherein the first adjustment screw is arranged on the support body and is connected to the first pin which is mounted on the base body so that the base body is pivotable relative to the support body about the second pivot axis, and
wherein the second adjustment screw is arranged on the support body and is connected to the second pin which is mounted on the base body so that the base body is pivotable relative to the support body about the first pivot axis.

2. The strand pelletizer according to claim 1 , wherein the respective pivot axis runs perpendicularly to a support plane of the support body.

3. The strand pelletizer according to claim 1 , wherein the base body is pivotably mounted on the first pin and the second pin.

4. The strand pelletizer according to claim 1 , wherein the base body is at least one of linearly displaceable and pivotable on a support plane of the support body by means of at least one of the first adjustment screw and the second adjustment screw.

5. The strand pelletizer according to claim 1 , wherein the respective adjustment screw and the respective pin are pretensioned relative to one another by means of a respective spring element.

6. The strand pelletizer according to claim 1 , wherein the respective adjustment screw is pivotably mounted relative to the support body.

7. The strand pelletizer according to claim 1 , wherein the respective adjustment screw is mounted in a respective bushing arranged on the support body.

8. The strand pelletizer according to claim 5 , wherein the respective spring element is arranged between the respective pin and a respective bushing fastened to the support body.

9. The strand pelletizer according to claim 1 , comprising at least one fixing unit for fixing the base body and the support body to each other.

10. A method for adjusting a cutting gap of a strand pelletizer comprising the steps of:
providing a strand pelletizer for pelletizing a strand of material with
at least one cutting edge,
an opposite cutting edge, wherein
the opposite cutting edge is arranged on a base body and
the base body is linearly displaceable relative to a support body for adjusting the opposite cutting edge, and

a feeding device for feeding a material strand into a cutting gap between the at least one cutting edge and the opposite cutting edge,
a first adjustment screw and a first pin which forms a first pivot axis and is displaceable by means of the first adjustment screw,
a second adjustment screw and a second pin which forms a second pivot axis and is displaceable by means of the second adjustment screw,

wherein the first adjustment screw is arranged on the support body and is connected to the first pin which is mounted on the base body so that the base body is pivotable relative to the support body about the second pivot axis, and
wherein the second adjustment screw is arranged on the support body and is connected to the second pin which is mounted on the base body so that the base body is pivotable relative to the support body about the first pivot axis, and
at least one of linearly displacing the base body relative to the support body and pivoting of the base body relative to the support body about at least one of the first pivot axis and the second pivot axis for adjusting the cutting gap.

Assignees

• Coperion Gmbh

Inventors

• Matuschek Martin
• Wygas Stefan

Classifications

• B02C2018/188

  Stationary counter-knives; Mountings thereof · CPC title

• B02C18/2283

  using rollers (B02C18/225 takes precedence) · CPC title

• B02C18/148

  specially adapted for disintegrating plastics, e.g. cinematographic films (for plastic bottles B02C19/0093, disintegrating plastics B29B17/00) · CPC title

• B02C18/144

  with axially elongated knives · CPC title

• B01J2/22

  by pressing in moulds or between rollers · CPC title