Rubber crawler producing method

Abstract

It is to provide a method of manufacturing a rubber crawler which enhances a degree of freedom in the handling in a vulcanization-shaping of a crawler part and largely improves vulcanization shapability and operability and facilitates an arrangement of an auxiliary device or the like. In a method of manufacturing a rubber crawler comprising a first vulcanization step of vulcanization-shaping by simultaneously heating and pressing inner circumferential side rubbers (2A, 2B) and ground side rubbers (3A, 3B) having a length corresponding to about a half circumferential length of an endless ring-shaped reinforcing cord (1) with a middle mold (6) arranged in an inner circumferential side of the reinforcing cord (1) and upper mold (4) and lower mold (5) arranged up and down on an outer circumferential side of the reinforcing cord (1) and a second vulcanization step of vulcanization-shaping rubbers having a length corresponding to a remaining half circumferential length in the same manner as described above, at least a middle mold (6) is heated at each step by flowing heat medium through flow paths (7) formed in the mold, whereby the thickness of at least the middle mold (6) is made thin.

Description

technical field [0001] The present invention relates to a manufacturing method of a ring-shaped rubber crawler, which is suitable for snowmobiles, construction vehicles, etc. transformed into recreational vehicles (hereinafter referred to as "RV vehicles"). Background technique [0002] In recent years, the driving wheel of the RV vehicle has been removed, and a circular track drive device composed of multiple sprockets and runners is installed. At the same time, a circular rubber track is installed on the circular track drive device, and the use as a snowmobile has increased. Under such circumstances, there is a strong demand to provide a rubber crawler track that can cope with a higher speed of the vehicle. [0003] Furthermore, not only ordinary snowmobiles, but also construction vehicles, etc., on which rubber tracks are mounted for the purpose of reducing noise, vibration, etc., are similarly forced to respond to the increase in speed of the tracks. [0004] However, t...

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Problems solved by technology

[0014] However, in this proposed technology, especially the hot plate for vulcanization is arranged on the middle mold 6, and the thickness D in the vertical direction shown in the figure is considerably thicker, and only when the thickness D becomes thicker, it is Existence exploit image 3 (a), (b) shown in the first vulcanization process of the reinforced embossed 1 protruding part E1 and image 3 In the second vulcanization project shown in (c) and (d), the enclosing space of the protruding part E2 outside the mold of the vulcanized crawler part is not appropriate; this situation is used in the second vulcanization project and will be adopted by The end parts of the rubber parts 2A, 3A, 2B, and 3B vulcanized in the first vulcanization process are repeatedly arranged in the upper and lower molds 4, 5 and the middle mold 6, for example, every few pitches, so that the first and second It is important in the case of a vulcanization method that the mutual bonding of the vulcanized rubber parts in each subsequent vulcanization operation is more reliable; under the relationship between the circumference of the mold and the circumference of the rubber track, the surrounding space becomes smaller, so there is a rubber track. The manipulative workability at the time of demoulding is low, and it may cause obstacles to the arrangement of tensioning devices in the surrounding space.

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