Extruder tooling

Patent metadata

Field	Value
Publication number	US-10207445-B2
Application number	US-201415108836-A
Country	US
Kind code	B2
Filing date	Dec 30, 2014
Priority date	Jan 10, 2014
Publication date	Feb 19, 2019
Grant date	Feb 19, 2019

Abstract

The invention relates to an extruder tooling for placement in an extruder head and for forming an elastomeric strip with reinforcement cords, wherein the extruder tooling includes a die for applying elastomeric material to the reinforcement cords and a cord guide for guiding the reinforcement cords in a guide plane towards the die, wherein the cord guide includes cord guide members, wherein the extruder head is provided with flow channels which are arranged to debouch, via slits in the cord guide members, into the die, wherein the lower cord guide member and the upper cord member are each provided with an inner body extending on the inside of the lower slit and the upper slit, respectively, and an outer body extending on the outside of the lower slit and the upper slit, respectively, wherein the inner bodies are integrally connected to the respective outer bodies.

First claim

The invention claimed is:

1. An extruder tooling for placement in an extruder head and for forming an elastomeric strip with reinforcement cords, wherein the extruder tooling comprises:
a die for applying elastomeric material to the reinforcement cords; and
a cord guide for guiding the reinforcement cords in a guide plane towards the die,
wherein the cord guide comprises:
a lower cord guide member and an upper cord guide member which are arranged to be mated with each other on opposite sides of the guide plane with the reinforcement cords extending in between them,
wherein the extruder head is provided with a lower flow channel and an upper flow channel which, at one end, are arranged to be in fluid communication with a supply of elastomeric material, and, at an other end, are arranged to debouch, via a lower slit in the lower cord guide member and an upper slit in the upper cord guide member, into the die from opposite sides of the guide plane,
wherein the lower slit and the upper slit have an inside with respect to the guide plane and an outside with respect to the guide plane,
wherein the lower cord guide member and the upper cord guide member are each provided with an inner body extending on the inside of each of the lower slit and the upper slit, respectively, with respect to the guide plane and an outer body extending on the outside of each of the lower slit and the upper slit, respectively, with respect to the guide plane,
wherein the outer bodies at least partially overlap the inner bodies in a direction normal to the guide plane, wherein the inner body and the outer body of the lower cord guide member are integrally connected to form a first single, integral member, and
wherein the inner body and the outer body of the upper cord guide member are integrally connected to form a second single, integral member.

2. The extruder according to claim 1 , wherein the first single, integral member and the second single, integral member are indivisible members.

3. The extruder according to claim 1 , wherein the first single, integral member and the second single, integral member are monolithic members or monoblocks.

4. The extruder tooling according to claim 1 , wherein the cord guide is arranged for guiding the reinforcement cords in an entry direction towards the die, and
wherein the lower cord guide member and the upper cord guide member are provided with lower side bodies and upper side bodies, respectively, which, at both ends in a direction transverse to the entry direction, integrally connect the respective inner bodies to the respective outer bodies.

5. The extruder tooling according to claim 1 , wherein the inner bodies are provided with oblique inner surfaces which are arranged to taper towards each other from opposite sides of the guide plane into a sharp tip facing into the entry direction.

6. The extruder tooling according to claim 1 , wherein the lower cord guide member and the upper cord guide member, considered in a direction normal to the guide plane, extend both on the inside and the outside of the lower slit and the upper slit, respectively, with respect to the guide plane.

7. The extruder tooling according to claim 1 , wherein the lower slit and the upper slit, in a circumferential direction substantially perpendicular to a course or a path of the slits through their respective cord guide members, are fully encapsulated by the lower cord guide member and the upper cord guide member, respectively.

8. The extruder tooling according to claim 1 , wherein the lower cord guide member and the outer cord guide member are arranged to be placed in direct contact with the die at the respective outer bodies of the cord guide members.

9. The extruder tooling according to claim 1 , wherein the die comprises a lower die member and an upper die member which are arranged to be mated with each other on opposite sides of the guide plane.

10. The extruder tooling according to claim 9 , wherein the lower die member and the upper die member are connected to the outer bodies of the lower cord guide member and the upper cord guide member, respectively.

11. The extruder tooling according to claim 10 , wherein the lower cord guide member and the lower die member are integral and/or form a monoblock, and
wherein the upper cord guide member and the upper die member are integral and/or form a monoblock.

12. The extruder tooling according to claim 9 , wherein the outer body of the lower cord guide member and outer body of the upper cord guide member are provided with a lower abutment surface and an upper abutment surface, respectively, and
wherein the lower die member and the upper die member are arranged to be placed in the extruder head in abutment with the lower abutment surface and the upper abutment surface, respectively.

13. The extruder tooling according to claim 12 , wherein the lower abutment surface and the upper abutment surface extend normal to the guide plane.

14. The extruder tooling according to claim 1 , wherein one of the cord guide members is provided with a plurality of parallel guiding grooves for receiving and guiding the reinforcement cords towards the die,
wherein at least three quarters of the circumference of the guide grooves is defined by the inner body of the one cord guide member, and
wherein the remaining circumference is open towards the other cord guide member.

15. An extruder device comprising:
an extruder head; and
extruder tooling for placement in the extruder head and for forming an elastomeric strip with reinforcement cords,
wherein the extruder tooling comprises a die for applying elastomeric material to the reinforcement cords and a cord guide for guiding the reinforcement cords in a guide plane towards the die,
wherein the cord guide comprises a lower cord guide member and an upper cord guide member which are arranged to be mated with each other on opposite sides of the guide plane with the reinforcement cords extending in between them,
wherein the extruder head is provided with a lower flow channel and an upper flow channel which, at one end, are arranged to be in fluid communication with a supply of elastomeric material, and, at an other end, are arranged to debouch, via a lower slit in the lower cord guide member and an upper slit in the upper cord guide member, into the die from opposite sides of the guide plane,
wherein the lower slit and the upper slit have an inside with respect to the guide plane and an outside with respect to the guide plane,
wherein the lower cord guide member and the upper cord guide member are each provided with an inner body extending on the inside of each of the lower slit and the upper slit, respectively, with respect to the guide plane and an outer body extending on the outside of each of the lower slit and the upper slit, respectively, with respect to the guide plane, wherein the outer bodies at least partially overlap the inner bodies in a direction normal to the guide plane, and
wherein the inner body and the outer body of the lower cord guide member are integrally connected to form a first single, integral member and wherein the inner body and the outer body of the upper cord guide member are integrally connected to form a second single, integral member.

16. The extruder device according to claim 15 , wherein the extruder head is provided with a lower clamping body and an upper clamping body, each provided with a head clamping surface facing inwards with respect to the guide plane for clamping of the extruder tooling from both sides of the guide plane, and
wherein the lower cord guide member and the upper cord gui

Assignees

• Vmi Holland Bv

Inventors

• Janszen Cornelis Wouteres

Classifications

• B29C48/705 Primary

  in the die zone, e.g. to create flow homogeneity · CPC title

• B29C48/2562

  Mounting or handling of the die · CPC title

• B29K2021/003

  Thermoplastic elastomers · CPC title

• B29C48/156

  Coating two or more articles simultaneously · CPC title

• B29C48/15 Primary

  incorporating preformed parts or layers, e.g. extrusion moulding around inserts · CPC title