Coating processes – Electrical product produced – Motor stator or core for winding
Patent
1997-04-22
1998-06-16
Beck, Shrive
Coating processes
Electrical product produced
Motor stator or core for winding
427177, 4273722, 427413, 4274346, 464 69, 474202, B05D 512
Patent
active
057666750
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
1. Field of the Invention
The invention relates generally to a method for manufacturing flexible disks with annular loop packets for the transmission of traction forces.
2. Description of the Prior Art
Loop packets for flexible disks are usually wound from threads or strips which are then impregnated in liquid rubber which is cured but not vulcanized. The loop packets are then placed into a die in which they are attached to fastening means, in particular sleeves or rivets, and then commonly embedded in a rubber-elastic material which is then vulcanized. Although it is common practice to limit the space which is occupied by the loop packets in an axial direction prior to filling the die with rubber-elastic material by means of washers which, e.g. can be brought into engagement with the fastening means (DE 43 04 274 C1), this, however, enables only a rough definition of the shape and position of the loop packets over the major part of their length, in particular in their essentially straight portions. Due to variations in the manufacturing method, enveloping wall thicknesses are produced which range in the order of the cross-sectional dimensions of the loop packets. In addition, corresponding variations in the functional parameters (e.g. characteristics and life) of the flexible disks will result.
It is known (WO 92/14 597) to manufacture flexible disks in such a manner that sleeves serving as fastening means and, if required, other rigid parts, are combined with a skeleton by means of a plastic material injection apparatus, which is then embedded in injected caoutchouc which is subsequently vulcanized. Thereby, the conventional winding and inserting of loop packets is to be omitted in that these are replaced by the plastic skeleton. There are, however, many applications where loop packets cannot be dispensed with. This applies in particular to flexible disks in the drive train as well as in the steering linkage of motor vehicles.
It is therefore an object of the invention to develop a method of the initially mentioned generic type in such a manner that the wall thickness of the rubber-elastic material into which the loop packets are embedded and which is finally vulcanized can be reduced.
SUMMARY OF THE INVENTION
According to the invention, the object is solved by a method for manufacturing flexible disks with annular loop packets for the transmission of traction forces between fastening means in which the loop packets and the fastening means are combined into a ring and embedded in a rubber-elastic material. The loop packets are at least partially injection-coated by a coating of elastomeric material which defines and stabilizes at least an outer contour of the loop packets. The elastomeric material is at most partially vulcanized before the ring is completely embedded in the rubber-elastic material.
The loop packets are preferably first injection-coated with thermoplastic or elastic material either individually or in groups in a die which is of a complementary shape with respect to their outer geometry, taking into consideration manufacturing tolerances. With an appropriate configuration of the die, locally different materials can be employed and/or only parts of the loop packets can be injection-coated. In any case, by injection coating, the loop packets or groups of loop packets which may form a complete ring become components which are true to shape and size with defined wall thicknesses which may be on the order of the thread diameter of the loop packets. This results in a standardization of the characteristics and life of the flexible disk as well as a reduction in material consumption.
Advantageous further development of the invention will become apparent from the dependent claims.
BRIEF DESCRIPTION OF THE DRAWINGS
Embodiments of the invention will be explained in the following description in more detail with reference to the schematic drawings, each of which is a perspective view of:
FIG. 1 a single loop packet;
FIG. 2 a sectional view of part of the loop packet s
REFERENCES:
patent: 1483561 (1924-02-01), Ungar
patent: 1676333 (1928-07-01), Kattwinkel
patent: 2157093 (1939-05-01), Bemis
patent: 4118952 (1978-10-01), Kobayashi
patent: 4588388 (1986-05-01), Chivari
patent: 4738650 (1988-04-01), Hojo et al.
patent: 4804352 (1989-02-01), Schmidt
patent: 5163876 (1992-11-01), Zilberman et al.
patent: 5186686 (1993-02-01), Staples et al.
Andra Rainer
Hingerl Anton
Nindel Wolfgang
Beck Shrive
SGF - Suddeutsche Gelenkscheibenfabrik GmbH & Co. KG
Talbot Brian K.
LandOfFree
Method for manufacturing flexible disks does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method for manufacturing flexible disks, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for manufacturing flexible disks will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1722485