JPS5919019B2 - Method for manufacturing rubber rollers for spinning, etc. - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a spinning rubber roller such as a gill roller,
The present invention relates to a method for manufacturing rubber rollers with iron cores used for office equipment such as copying machines and other various uses.

Conventionally, this type of rubber roller has generally been manufactured by fitting a vulcanized or unvulcanized rubber cylinder to an iron core via an adhesive, and vulcanizing and polishing the cylinder as necessary.

However, when using this manufacturing method, it is generally difficult to expect sufficiently strong adhesive integration between the rubber tube and the iron core.
When used under harsh conditions, there have been cases where the rubber cylinder has come loose from the iron core. In addition, since the rubber cylinder is bonded directly to the iron core with adhesive, the diameter and surface accuracy of their contact surfaces directly affect the finishing accuracy of the rubber roller, and for this reason, it is necessary to finish them with high precision in advance. There were many problems in manufacturing, such as the need to do so, and manufacturing efficiency was poor. The present invention aims to solve the above-mentioned problems and provide a method for manufacturing rubber rollers with high efficiency and high precision.

The gist of this invention is to rupture a rubber cylinder having an inner diameter larger than the diameter of the iron core on the outside of the iron core, and to fill at least one end of the gap between the iron core and the rubber cylinder with the iron core. A rubber or resin-based hardening filling liquid is injected into the gap, which is closed with a tight-fitting annular soft elastic packing, and after or before filling, the other end of the gap is also filled with a soft elastic packing. The iron core and the rubber cylinder are held concentrically by closing with elastic packing or by installing the same packing having an injection hole for filling at the other end of the gap and then injecting the filling liquid from the injection hole. The present invention relates to a method for manufacturing a rubber roller for spinning, etc., characterized in that the filling liquid is hardened in a state in which the filling liquid is cured.

The above-mentioned soft elastic packing used in this invention is made of rubber such as nitrile rubber, chloroprene rubber, putadiene rubber, silicone rubber, urethane rubber, ethylene propylene rubber, natural rubber, etc., as well as soft vinyl chloride, soft polypropylene, soft polyethylene, etc. It may be made of soft synthetic resin, or it may be made of foamed material thereof, cork, or nonwoven fabric impregnated with soft resin. When such packing is to be repeatedly reused, a release agent such as silicone oil may be applied to the surface. On the other hand, the hardening type filling liquid to be filled into the gap between the iron core and the rubber tube may be a liquid resin such as a synthetic resin such as an epoxy resin or a polyurethane resin.

Examples of rubber-based rubbers include liquid rubbers or rubber solutions such as butadiene rubber, styrene fluoride rubber, acrylonitrile butadiene rubber, urethane rubber, and polysulfide rubber. Next, the first embodiment of the present invention will be explained based on the drawings.

The rubber tube 2 is made in advance so that its inner diameter is larger than the outer diameter of the middle part of the iron core 1, and this is placed on the outside of the iron core 1.
It is fitted with the required gap 3 left.

On the other hand, an annular soft elastic packing 4 is attached to the iron core 1 from one end thereof.
The inner and outer peripheral surfaces 4a and 4b of the iron core 1 are fitted into elastic contact with the outer surface of the iron core 1 and the inner surface of one end of the rubber tube 2, thereby forming a gap 3 between the two.
Close one end of. Next, the iron core 1 is vertically supported by appropriate means, and a room temperature curing or thermosetting filling liquid 5 is injected into the gap 3 from the open upper end side thereof. Next, before this filling liquid 5 hardens, a soft elastic packing 6 similar to the above is fitted onto the upper end of the iron core 1, and this is placed inside the upper end of the rubber cylinder 2 to close the upper end of the gap 3 as well. As a result, the entire length of the rubber tube 2 is held concentric with the iron core 1, so
The filling liquid 5 is left to stand or heated for a required period of time to harden, and the eight-iron core 1 and the rubber cylinder 2 are integrated to form a rubber roller. For rubber rollers that require high precision, both ends of the rubber cylinder 2 are cut off along with the packings 4 and 6, and the surface is polished to obtain a finished product. In the above embodiment, the soft elastic packing 6 of Shibe is filled with the filling liquid 5.
However, after the upper and lower packings 4 and 6 have been installed in advance, the filling liquid may be injected through the injection hole or the like provided in the packing 6f1C of the earth part. However, the rubber tube 2 used in the present invention may be vulcanized or unvulcanized, and if it is unvulcanized, it will naturally be vulcanized at some point during the manufacturing process.

As described above, the present invention involves fitting a rubber tube 2 having an inner diameter larger than the diameter of the outer circumference of an iron core 1, filling the gap 3 between the rubber tube 2 with a VC hardening type filling liquid 5, and hardening the entire rubber tube. Since it is integrally molded, the manufacturing process is simple, and in particular, the annular soft elastic packing 4 made of rubber or the like is used to close the bottom of the gap 3 before injecting the filling liquid. It can be installed very easily and complete leakage prevention of liquid can be easily achieved, and the earth part of the gap 3 can be made of iron by installing packing similar to the above, or by installing packing with an injection hole. Since the filling liquid is cured while holding the core and the rubber tube concentrically, the series of manufacturing steps can be simplified, and mass productivity can be greatly improved compared to conventional manufacturing methods. It is possible to provide a rubber roller of excellent quality without causing poor adhesion between the iron core 1 and the rubber tube 2.

In addition, even if there are slight variations in precision between the outer surface of the iron core 1 and the inner surface of the rubber cylinder 2, the surface precision of the product will not deteriorate due to this, improving manufacturing efficiency and yield. At the same time, the rubber cylinder 2 is held concentrically with the iron core 1 by the annular elastic packings 4, 5f1C attached to both ends of the rubber cylinder 2, and the filling liquid 5 is cured, and the rubber cylinder 2 is held concentrically with the iron core 1. 1, it is possible to easily manufacture a high-precision rubber roller in which the axes of the rubber tube 2 and the iron core 1 are completely aligned.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and FIG. 1 is a longitudinal cross-sectional view showing a soft elastic packing in the middle of being installed to close the upper part of the gap after the filling liquid has been injected and filled, and FIG. FIG. 1...Iron core, 2...1...Rubber tube, 3...
・Gap, 4... Soft elastic packing 5...
...Filling liquid, 6...Material elastic packing.

Claims (1)

[Scope of Claims] 1. An annular soft elastic packing in which a rubber cylinder having an inner diameter larger than the diameter of the iron core is fitted on the outside of the iron core, and at least one end of the gap between the two is tightly fitted to the iron core. After the gap is closed, a rubber or resin-based hardening filling liquid shall be injected and filled, and after the filling, the other end of the gap shall be closed with a soft elastic packing in the same manner as above, or before filling. Attach the same packing having an injection hole to the other end of the gap, and then inject the filling liquid from the injection hole to harden the filling liquid while holding the iron core and the rubber cylinder concentrically. A method of manufacturing a rubber roller for spinning, etc., characterized by applying pressure. 2. The method of manufacturing a rubber roller for spinning or the like according to claim 1, characterized in that an epoxy resin containing a curing agent is used as the filling liquid. 3. A method for manufacturing a rubber roller for spinning, etc., as set forth in claim 1, characterized in that urethane rubber is used as the filling liquid.