We are capable of manufacturing and repairing crown rolls such as radial crowns, taper crowns, and reverse crowns (concave).
Surface treatment: Hard chrome plating Finishing: Buff polishing, mirror polishing ■ What is a crown roll? A crown roll is a roll whose central dimension is higher than the dimensions at its ends, finished in an arc shape, referred to as a radial crown, while those finished by connecting taper shapes are called taper crowns. Conversely, a roll with higher dimensions at its ends than at its center, opposite in shape to a crown roll, is called a reverse crown. ■ Applications In addition to preventing deflection and ensuring uniform nip, crown rolls are used for various purposes, including stretching film wrinkles. ■ Precision rolls and mirror finishes are also available. We can manufacture crown rolls with a precision of less than 3μ using high-precision grinding machines, as well as ultra-mirror crown rolls with a finish of less than 0.05S using mirror polishing machines. We also offer measurement of existing roll crown values, creation of backup rolls, and repair of crown rolls.
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basic information
【Equipment Owned】 Chrome Plating Tanks: 1.3m(W)×4.5m(L)×5.8m(H) 1.7m(W)×4.5m(L)×4.7m(H) and others; total of 10 tanks Polishing Machines: Cylindrical polishing, cylindrical vertical polishing, cylindrical buff polishing, inner diameter buff polishing, double-headed buff polishing, flexible buff polishing Roll Processing Equipment: CNC precision lathe, general-purpose lathe Machining center, radial drill Vertical milling machine, welding equipment Dynamic balancing machine *For details on processable sizes, please contact us.
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Applications/Examples of results
■Coating roll of the film forming device φ125×2980×3193 Material: STKM13A Crown amount D = 0.566 Runout: 0.007μ or less ■Guide roll for film transport (reverse crown) φ130×1500×1650 Material: Aluminum Crown amount D = 0.8 Buff finish: 0.4S or less ■Casting roll of the extrusion molding machine φ350×1450×2335 Material: S45C hardened product Crown amount D = 0.15 Mirror finish: 0.2S or less We have many other achievements as well!
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Company information
We are a technology-oriented company that focuses on plating technology and roll manufacturing technology as our two main pillars. We possess extensive know-how in various functional plating and high-precision roll manufacturing and processing, and we strive to be of service to our customers day and night. We actively take on challenges that other companies have declined or that no other company is willing to tackle.