JPH04110136A - Manufacture of rubber form with resin tape - Google Patents

Abstract

PURPOSE:To enable a resin tape to be stuck to a rubber with strong adhesion strength by extrusion pressure, while the resin tape is stuck to the rubber in the state where the adhesive is sufficiently activated by a method in which after the resin tape coated with an adhesive has been heated in a heating device, the tape flows together with the rubber and they are extruded. CONSTITUTION:A heating roller 5 is rotated by a motor and sends the tape 7 fed from a tape-stocker at the same speed as the discharging speed of the rubber 8 extruded from an extruding hole 2. The tape 7 sent from said heating roller 5 is composed of the resin material such as polytetraethylenefluoride resin, etc., and its adhesion surface is coated with the adhesive (e.g. the adhesive of chlorinated rubber type as a main component), and it is heated by the heating roller 5. Then the heated tape 7 passes through a tape-introducing path 3 and flows together with the rubber 8 at the end of the extruding hole 2 and then is extruded with the rubber 8 from an extruding die 4.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a method for manufacturing a rubber molded article having a resin tape adhered to its surface.

BACKGROUND ART Conventionally, in order to adhere a tape made of polytetrafluoroethylene resin or the like to a rubber molded body, as shown in FIG. introduced,
By merging the tape 7 and the rubber 8 and extruding them, the tape 7 and the rubber (rubber molded body) 8 were bonded together using the extrusion pressure.

Problems to be Solved by the Invention It is generally known that adhesives (for example, adhesives for tights mainly composed of chlorinated rubber) become activated when heated to a specific temperature, resulting in the same adhesive properties as above. However, the extrusion tie 4 is held at approximately 60'C to maintain the properties of the extruded rubber. Therefore, the tape 7 is adhered to the rubber 8 without being sufficiently heated. Therefore, there was a problem of insufficient adhesive strength between the tape 7 and the rubber 8.

Means for Solving the Problems The present invention was devised to solve the problems of the prior art described above, and involves heating a resin tape coated with an adhesive using a heating device, and then extruding the resin tape by merging it with rubber. It is characterized by

Working The adhesive applied to the resin tape is heated and activated, so that even under normal extrusion pressures, the tape adheres to the rubber with strong adhesive strength.

Example Embodiments of the present invention will be described in detail below with reference to the drawings.

Figure 1 is a sectional view of the main parts of the extruder, and in this figure, 1
is the extrusion head of the extruder. For this extrusion, an extrusion die 4 equipped with an extrusion hole 2 and a tape introduction path 3 opening at the end of the extrusion hole 2 is fixed to the end of the die 1. 5
A heating roller is provided as a heating device, and this heating roller 5 is arranged near the extrusion tie 4. The heating roller 5 has a heating element (not shown) such as a nichrome wire inside thereof, and is electrically connected to a power source 6. Further, this heating roller 5 is rotated by a motor (not shown), and sends out the tape 7 supplied from a tape stocker (not shown) at the same speed as the discharge speed of the rubber 8 pushed out from the extrusion hole 2. There is. The tape 7 sent out from the heating roller 5 is made of a resin material such as polytetrafluoroethylene resin, and the adhesive surface is coated with an adhesive (for example, an adhesive based on chlorinated rubber). It is heated to 190'C to 200'C by the heating roller 5. Thereafter, the heated tape 7 passes through the tape introduction path 3, merges with the rubber 8 at the end of the extrusion hole 2, and is extruded together with the rubber 8 from the extrusion tie 4. At this time, since the adhesive applied to the tape 7 is heated and activated, the tape 7 and the rubber (rubber molded body) 8 are strongly (adhered) by extrusion r + two forces.

Although the heating roller 15 is shown as the heating device in the above embodiment, the heating device is not limited to this, and various heating means such as a heating dryer can be used as the heating device.

DETAILED DESCRIPTION OF THE INVENTION As described above, in the present invention, a resin tape coated with an adhesive is heated by a heating device and then introduced into the extrusion hole end of an extrusion die, and this resin tape is extruded together with rubber. will be bonded with the adhesive fully activated.

Therefore, the resin tape and the rubber are bonded with strong adhesive strength by extrusion pressure, and the problem of insufficient adhesive strength does not arise.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view of the main parts of an extruder showing an embodiment of the present invention;
FIG. 2 is a sectional view showing a conventional example. 2.-extrusion hole, 4.. extrusion die, 5.. heating device (
heating roller), 7...tape, 8. rubber (rubber molded body). Figure 1

Claims (1)

[Claims] (1) A resin tape coated with adhesive is introduced into the end of the extrusion hole of an extrusion die, and the resin tape and rubber are merged and extruded to create a rubber molded body with resin tape that is crimped onto the rubber. A method for producing a rubber molded article with a resin tape, characterized in that the resin tape is heated with a heating device and then merged with rubber.