Kneading rotor, kneading machine, method for kneading rubber material, and method for manufacturing kneading rotor
AssigneeKobe Steel, Ltd.
InventorsTsutomu Koitabashi, Ryuichi Kobayashi, Yasuyuki Sugita, Masao Murakami
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Abstract
The kneading rotor according to one aspect of the present disclosure is a kneading rotor for a kneading machine, comprising a base made of carbon steel or alloy steel for machine structure, a padded layer made of austenitic stainless steel on at least part of a surface of the base and has a hard chromium plated layer on at least part of a surface of the padded layer.
Claims9
A kneading machine for kneading a rubber material, the kneading machine including a kneading rotor, the kneading rotor comprising:
- a base made of carbon steel or alloy steel for machine structure,
- a padded layer made of austenitic stainless steel on at least part of a surface of the base, and
- a hard chromium plated layer on at least part of a surface of the padded layer.
A method for kneading a rubber material using a kneading machine for kneading the rubber material, the kneading machine including a kneading rotor, wherein
- the kneading rotor comprises:
- a base made of carbon steel or alloy steel for machine structure,
- a padded layer made of austenitic stainless steel on at least part of a surface of the base, and
- a hard chromium plated layer on at least part of a surface of the padded layer, the kneading rotor has therein a flow channel through which a coolant is allowed to flow, the rubber material contains silica and a silane coupling agent,
- the rubber material is kneaded while a coolant is made to flow through the flow channel.
A method for manufacturing a kneading rotor for a kneading machine, the method comprising:
- forming a padded layer made of austenitic stainless steel on at least part of a surface of a base made of carbon steel or alloy steel for machine structure by welding or fusing, and
- forming a hard chromium plated layer having a thickness of 20 μm or more and a Vickers hardness of Hv750 or more on at least part of a surface of the padded layer by an electroplating process.
Dependencies are inferred from the claim text.