Hose extrusion head and method for producing a hose

• US 10,639,838 B2
• Filed: 02/25/2015
• Issued: 05/05/2020
• Est. Priority Date: 03/14/2014
• Status: Active Grant

• Current Assignee: KraussMaffei Berstorff GmbH (KraussMaffei Group GmbH)
• Original Assignee: KraussMaffei Berstorff GmbH (KraussMaffei Group GmbH)
• Inventors: Reineke, Frank, Hepke, Harald
• Primary Examiner(s): Zhao, Xiao S
• Assistant Examiner(s): Leyson, Joseph S
• Application Number:
  US15/120,957
• Publication Number:
  US 20160361857A1
• Time in Patent Office: 1,896 Days
• CPC Class Codes: B29C 2948/92152 Thickness
• CPC Class Codes: B29C 2948/92447 Moulded article
• CPC Class Codes: B29C 2948/92647 Thickness
• CPC Class Codes: B29C 2948/92666 Distortion, shrinkage, dilatation, swell or warpage
• CPC Class Codes: B29C 2948/92904 Die; Nozzle zone
• CPC Class Codes: B29C 48/09 Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels
• CPC Class Codes: B29C 48/10 flexible, e.g. blown foils
• CPC Class Codes: B29C 48/302 being adjustable, i.e. having adjustable exit sections
• CPC Class Codes: B29C 48/325 being adjustable , i.e. having adjustable exit sections
• CPC Class Codes: B29C 48/327 with centering means
• CPC Class Codes: B29C 48/92 Measuring, controlling or regulating

Abstract

The invention relates to a hose extrusion head for producing a hose (50), said head comprising a head housing, a duct (14) formed in the head housing (12) for supplying a hose material (22), a pin (16) which is arranged in the duct (14), a die (18) and at least one securing element (20). According to the invention, the securing element (20) is attached by one end (39) to the die (18) such that said end (39) follows the movement of the die (18).

Claims

1. A hose extrusion head for producing a hose, said hose extrusion head, comprising:

a head housing;

a duct formed in the head housing for supplying a hose material;

a phi arranged in the duct;

a die movable relative to the pin for centering; and

at least one securing element configured to attach the die to the head housing, said securing element having one end attached to the die such that the end follows a movement of the die,

wherein the at least one securing element is a pre-tensioned wire cable.

2. The hose extrusion head of claim 1, wherein the die lies against the head housing at a contact surface, said securing element being configured to clamp the die toward the contact surface.

3. The hose extrusion head of claim 1, wherein the securing element is arranged such that a mass force, which is exerted by the hose material in an operating state of the hose extrusion head on the die, reduces a frictional force between the die and the head housing.

4. The hose extrusion head of claim 1, wherein the securing element is fixed in a head housing attachment point relative to the head housing and attached to the die in a die attachment point, said head housing attachment point being arranged upstream to the die attachment point with respect to an inflow path of the hose material.

5. The hose extrusion head of claim 1, wherein the die comprises a die insert, and a die insert holder including an axial adjusting device having an axial adjusting device for adjusting an axial position of the die insert relative to the die insert holder.

6. The hose extrusion head of claim 1, further comprising a positioning device configured to alter a position of the die relative to the pin so as to enable centering of the die relative to the pin.

7. The hose extrusion head of claim 6, wherein the positioning device is a part of a position regulation and includes at least one drive for automatically changing the position of the die, said position regulation further including a wall thickness measuring device for measuring a wall thickness of the hose, said wall thickness measuring device being configured for automatically changing the position of the die so as to prevent the wall thickness of the hose to fall below a predetermined nominal wall thickness and to minimize an overall deviation of the wall thickness from the predetermined nominal wall thickness.

8. The hose extrusion head of claim 1, further comprising a seal arranged between the die and the head housing.

9. A hose production device for producing a hose, said hose production device comprising:

an extruder for delivering hose material; and

a hose extrusion head comprising a head housing, a duct formed in the head housing for supplying a hose material, a pin arranged in the duct, a die movable relative to the pin for centering, and at least one securing element configured to attach the die to the head housing and having one end attached to the die such that the end follows a movement of the die,

said hose extrusion head being connected with the extruder so that, in operation, the extruder delivers the hose material into the duct,

wherein the at least one securing element is a pre-tensioned wire cable.

10. The hose production device of claim 9, wherein the die lies against the head housing at a contact surface, said securing element being configured to clamp the die toward the contact surface.

11. The hose production device of claim 9, wherein the securing element is arranged such that a mass force, which is exerted by the hose material in an operating state of the hose production device on the die, reduces a frictional force between the die and the head housing.

12. The hose production device of claim 9, wherein the securing element is fixed in a head housing attachment point relative to the head housing and attached to the die in a die attachment point, said head housing attachment point being arranged upstream to the die attachment point with respect to an inflow path of the hose material.

13. The hose production device of claim 9, wherein the die comprises a die insert, and a die insert holder including an axial adjusting device having an axial adjusting device for adjusting an axial position of the die insert relative to the die insert holder.

14. The hose production device of claim 9, wherein the hose extrusion head includes a positioning device configured to alter a position of the die relative to the pin so as to enable centering of the die relative to the pin.

15. The hose production device of claim 14, wherein the positioning device is a part of a position regulation and includes at least one drive for automatically changing the position of the die, said position regulation further including a wall thickness measuring device for measuring a wall thickness of the hose, said wall thickness measuring device being configured for automatically changing the position of the die so as to prevent the wall thickness of the hose to fail below a predetermined nominal wall thickness and to minimize an overall deviation of the wall thickness from the predetermined nominal wall thickness.

16. The hose production device of claim 9, wherein the hose extrusion head includes a seal arranged between the die and the head housing.

17. The hose production device of claim 9, wherein the hose material is rubber.