EXTRUSION OF PROFILES UTILISING OPPOSITE ROTATING DIES

Abstract

The invention relates to device and method enabling industrial continuous pressing, called extrusion of plastically/thermally mouldable substances (11) such as metal, composite metal, plastic, composite or rubber, which is pressed to the profile (12) by a process comprising tool fixed member (6) partially predefining the profile shape/cross-section before the profile finally defined to fixed or varied cross-section when the material passes rotating dies (2) which can be patterned or smooth and through the contact with each other (1) cancel out each main radial forces and the position of which in some embodiments of the invention may vary relative to other bearing surfaces (13, 17) or rotary bearing surfaces (4) of the tool with which they define the final shape of the profile. The invention enables the extrusion of pattern on the inside of hollow profiles and the extrusion of multiple profiles in one tool, because 80-98% of the radial bearing forces are eliminated, allowing the installation of rotary dies where not previously possible, and almost unlimited opportunities in increased profile width.

Claims

1. Device (100) for the extrusion of plastically/thermally deformable material (11) to one or more profiles (12) of fixed or variable cross section comprising one or more static parts matrix (6) which in cooperation with multiple so-called rotary dies (2) which completely or partly defines the profile cross-section and variation characterized in that the rotating dies (2) are in contact with the surfaces (1) allowing the transfer of opposing radial forces.

2. Device according to claim 1, characterized in that the rotating dies (2) are in contact with the surfaces (1) which transmits the opposed radial forces to these largely cancel each other out and the power transmitting surfaces (1) are not constituted by the shaping surface portions (3) on the rotating dies (2).

3. Device according to claim 1 or claim 2, characterized in that the rotating dies (2) are in contact with the surfaces (1) which transmits the opposed radial forces to these largely cancel each other out and that in the device (6) are outer rotary dies (4) acting as dies for the opposite side of the extruded profile (12).

4. Device according to claim 1 or 2, characterized in that there are one or more movable bearing inserts (13).

5. Device according to claim 4, characterized in that the device is constructed so that the bearing length (14a, 14b) increases as the profile thickness increases (15a, 15b), by bearing (18a, 18b) becomes an extension of the bearing when the movable bearing insert (13) is in its outer position by prebearing and bearing coming in line.

6. Device of claim 1 or 2, characterized in that the rotating dies (2) are located in a core portion (16a) enabling extrusion with rotating dies on the inside of the extruded hollow section (22).

7. Device according to the claim 6, wherein the movable bearing inserts (13) in the static tool part (16b) which allows adjustment of the material thickness of the extruded hollow section, in that they can be raised or lowered

8. Device according to claim 6, characterized in that in the tool bore portion (16b) has outer rotary dies (4).

9. Device according to claim 8 characterized in that the outer rotating dies (4) can be raised/lowered.

10. Device according to claim 9 wherein the height adjustable rotary dies (4a, 4b) are combined with variable height/adjustable pre bearing (18).

11. Device according to claim 3 characterized in that the outer rotating dies (4) can be raised/lowered.

12. Device according to claim 11, characterized in that the height adjustable outer rotating dies are combined with variable height/adjustable pre bearing (18).

13. Device according to any preceding claim characterized in that the rotating dies (2) have the bearings for the radial forces (10) built in.

14. Device according to any preceding claim characterized in that the tool can contain 2, 4, 6, 8, 10, 12, 14, 16, 18, 20 or more inner rotary dies (2) in pairs which substantially cancel out each other radial forces.

15. Device according to any preceding claim characterized in that the rotary dies (2, 4) has a surface having low adhesion coefficient between rotary dies and the extruded material.

16. Device according to any preceding claim characterized in that the device vary the speed/volume per time unit with which the input amount of material feed extrusion/pultrusion tool in order to either allow such constant outlet speed as possible on the output profile, or decrease the outlet velocity, for avoid the risk of flaking/overheating of outgoing material, when the smaller profile area is run, by synchronizing the feed of material amount with variation in the outgoing cross-sectional area and thickness profile.

17. Method for the extrusion with device of any of the preceding claims characterized in that the rotary dies (2, 4) have a surface with low adhesion coefficient between rotating die/s and the extruded material and that the start-up takes hold of and pull the outgoing profile within 30 cm after being defined by the bearing surfaces and rotary dies and begins to pull it in the extrusion direction.

18. Method for the extrusion of plastically/thermally deformable material (11) to one or more profiles (12) of fixed or variable cross-section by a device comprising one or more static matrix elements (6), in collaboration with several so-called rotary dies (2) which completely or partly defines the profile cross-section and variation according to claim 1, characterized in that said method comprises the step of feeding the plastically/thermally deformable material (11) in contact with the rotary dies (2) which is in contact with surfaces (1) that transmits the opposing radial forces so that these largely cancel each other out.

19. Method according to claim 18, characterized in that the method comprises the step of feeding the plastically/thermally deformable material (11) in contact with the rotary dies (2) which is in contact with surfaces (1) which transmits the opposing radial forces so that these largely cancel each other and that these surfaces are not constituted by the shaping surface portions (3) on the rotating dies (2).

20. Method according to claim 18 or claim 19, characterized in that the method comprises the step of feeding the plastically/thermally deformable material (11) is in contact with the rotary dies (2) which in contact with surfaces (1) which transmits the opposing radial forces so that these largely cancel each other out and that the tool (6) are external rotating dies (4) that forms the opposite side of the extruded profile (12).

21. Method according to claim 18 or 19, characterized in that the material thickness of the extruded profile is varied by position of one or more movable bearing inserts (13) is varied.

22. Method according to claims 18-21 characterized by varying of the bearing length (14b, 14a) so that it as far as possible kept constant in relation to the profile thickness (15b, 15a), by allowing the variable bearing insert bearing surface form a longer bearing surface with pre bearing.

23. Method according to claims 18-22 for extrusion of hollow section characterized by the use of said rotary dies (2), located in a core portion (16a) together with rotating dies (2) shaping the inside of the extruded hollow section (22).

24. Method according to claim 23 wherein varying the material thickness of the extruded hollow profile by varying the position of one or more movable bearing inserts (13).

25. Method for the extrusion of hollow profile according to claim 23 wherein the outer rotary dies (4) acts as dies for the outside of the hollow profile.

26. Method for extrusion with rotating opposite dies according to claim 25 wherein the thickness of the outgoing profile is varied by raising/lowering the outer dies (4).

27. Method according to claim 25, wherein the thickness and pattern can be controlled by raising/lowering the rotary dies (4a, 4b) and/or raising/lowering pre bearing (18).

28. Method of claims 17-25, wherein the thickness and/or pattern varied by raising/lowering of the outer rotating dies (4).

29. Method according to claim 17-25 wherein the thickness and/or patterns is varied by external rotary dies raised/lowered combined with the & raising/lowering pre bearing (18).

30. Method according to any preceding claim characterized in that the device vary the speed/volume per time unit with which the input amount of material feed extrusion/pultrusion the tool with in order to either allow such constant outlet speed as possible on the outgoing profile, or decrease the outlet velocity, to avoid the risk of flaking/overheating of outgoing material, when the smaller profile area is run, by synchronizing the feed of material amount with variation in the outgoing cross-sectional area and thickness profile.

31. Method according to any preceding claim characterized in that the device vary the speed and/or force with which the output profile is stretched with to adapt to the variation in cross sectional area and initial speed of the outgoing material from the extrusion/pultrusion tool, so as to have such a constant tension force per cross-sectional area as possible on the outbound profile, by synchronizing the tensile force and/or speed variation of the outgoing cross-sectional area and the amount of material with which the volume of materials/unit time as the extrusion/pultrusion tool is feeded with.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0046] The present invention will now be described with reference to the accompanying drawings which of example illustrate preferred embodiments of the invention, the invention is not limited to those in the drawings exemplary embodiments, but may be of ordinary skill performed in several combinations of the various variants and with more rotating dies.

[0047] FIG. 1 shows a first embodiment of the invention, extruding the two smooth profiles.

[0048] FIG. 2 shows a second embodiment of the invention, extruding the two profiles with pattern on one side.

[0049] FIG. 3 shows the side view and the outlet of the second embodiment of the invention.

[0050] FIG. 4 shows the cross section from the side and from outlet of the second embodiment of the invention.

[0051] FIG. 5 shows the inlet side and the outlet of the second embodiment of the invention, to make patterns on both sides of the two profiles.

[0052] FIG. 6 shows the cross section of the second embodiment in which to make patterns on both sides of the two profiles.

[0053] FIG. 7 shows how the different Axial and radial bearings can be configured in the tool according to the second embodiment

[0054] FIG. 8 shows a third embodiment of the invention where varying the material thickness of the exiting profiles, by varying the bearings position and length.

[0055] FIGS. 9a and 9b show how the relationship between the bearings length and thickness profile is kept reasonably constant at varied thicknesswhich is important to balance the flow and stable process.

[0056] FIG. 10 shows the inlet, side and utloppsvy of the invention in a fourth embodiment to extrusion of hollow section with varied thickness.

[0057] FIG. 11 shows the outlet and side views of the invention in FIG. 10.

[0058] FIG. 12 shows a fifth embodiment of the invention enabling extrusion of hollow sections with patterns on both the inside and outside.

[0059] FIG. 13 shows the two static head portions separated and the cross section of the fifth embodiment.

[0060] FIGS. 14 and 15 show a sixth embodiment of the invention, which enables extrusion of hollow profiles with pattern on the inside and outside while one can vary the thickness and pattern on the outside.

[0061] FIG. 16 shows a seventh embodiment of the invention comprising an adjustable le pre bearing that provides additional possibilities of varying the thickness and pattern.

[0062] FIG. 17 shows how patterns can vary by varying the position of the rotating dies.

[0063] FIG. 18 shows how to vary the thickness and patterns by varying the position of the rotating dies and adjustable bearings.

DETAILED DESCRIPTION OF EXEMPLIFYING EMBODIMENTS

[0064] In FIG. 1 shows schematically a first embodiment of the invention consisting of the fixed tool part (6) with static bearing surfaces and two integrated rotating dies (2) which in cooperation form the incoming material (11) to two extruded smooth profiles. The two rotating (2) dies are in contact with each other (1) and the opposing force resultants from the plastic work take out each other. The device according to example embodiments is here generally indicated by reference numeral 100.

[0065] FIG. 2 shows a second embodiment of the invention, extruding the two profiles with pattern on one side. In this embodiment it has been to outer rotating dies (4) that designs oponentsidorna to the inner rotating dies (2) to teeth rack pattern is achieved. The inner rotating dies here is built in such a way that the shaping surfaces (3) is not the same as the surfaces (1) which transmit and even out opposing force resultants from plastic work.

[0066] FIG. 3 shows the side and outlet of the second embodiment of the invention, and clarifies that only need small holes (5) next to the rotating dies in the fixed tool part (6), resulting in strong cheap tools, with plenty of room for more rotating dies, which in turn makes it possible to make relative to simple tools extruding multiple profiles at once.

[0067] FIG. 4 shows the cross section from the side and from outlet of the second embodiment of the invention showing how the rotary die the axes (7) are integrated.

[0068] FIG. 5 shows the inlet (8), and the outlet side of the second embodiment of the invention, to make patterns on both sides of the two profiles (12).

[0069] FIG. 6 shows the cross section of the second embodiment in which to make patterns on both sides of the two profiles.

[0070] FIG. 7 shows how to manage to take up radial forces with needle and plain bearing (10) that are integrated into the rotating dies and how to thrust needle bearing means (10) fixes the rotating dies axial positions in a tool.

[0071] FIG. 8 shows a third embodiment of the invention where varying material thickness of the exiting profiles, by varying the bearings (13) position.

[0072] FIGS. 9a and 9b show how the relationship between the bearings length (14a, 14b) and profile thickness (15a, 15b) are kept reasonably constant at varied thickness, by allowing static bearing surface in fixed die member cooperate with variation of the bearings bearing lengthwhich is important to get balance in the flow and stable process.

[0073] FIG. 10 shows the inlet, side and outlet of the invention in a fourth embodiment to extrusion of hollow profiles with varied thickness.

[0074] FIG. 11 shows the outlet and sectional views of the invention in FIG. 10. In this FIG., One can also see how the inner rotating dies are arranged in the tool core portion (16a).

[0075] FIGS. 12 and 13 show a fifth embodiment of the invention enabling extrusion of hollow sections (22) with pattern on both the inside and outside. The inner rotating dies (2) in this embodiment has smooth portions (1) which transmit and even out opposing force resultants from plastic work, so that the radial bearings and shafts need only take up less forces.

[0076] FIG. 13 shows the two main parts static core portion (16a) and the bore portion (16b) separated and cross section of the fifth embodiment.

[0077] FIGS. 14 and 15 show a sixth embodiment of the invention, by raising (4b) and reduction (4a) of rotating dies enabling extrusion of hollow profiles with pattern on the inside and outside while one can vary the thickness and pattern on the outside. This embodiment of the invention can also be performed to extrusion of two or more separate profiles of varying thickness and varying tread depth.

[0078] FIG. 16 shows a seventh embodiment of the invention comprising an adjustable pre bearing (18) that provides additional possibilities of varying the thickness and pattern. One can also see how the combination of half-lowered pre bearing (18b) and completely raised rotating die (4b) resulting in a hollow profiles with patterned inside and smooth outer surface (22c) thereof 18b+4b=22c

[0079] FIG. 17 shows how patterns can vary by varying the position of the rotating dies (4a, 4b) relative to the adjustable pre bearing (18b).

[0080] FIG. 18 shows how to vary the thickness and pattern (22a, 22b, 22c) during extrusion of the hollow profiles with (22) by varying the position of rotating dies (4a, 4b, 4c) and adjustable bearings (18a, 18b). This can of course also be carried out during extrusion of non hollow sections.