Farbwalzenabdeckungen für Dekoriermaschinen: Was für ein Ersatz benötigt wird
Identify the Exact Ink Roller
In a two-piece can decorator, each inker supplies ink to a printing plate. The image then passes from the plate to a printing blanket before being transferred onto the formed can body.
An ink form roller contacts the printing plate. Other rolls distribute ink or carry it between contact points. Their positions and working requirements differ, and some distributor rolls have metal surfaces without rubber coverings.
For replacement, start with the OEM part number or the identification on the original roll.
If the number is missing, a photo showing the installed roller and its neighboring components can help establish the position. The machine model is useful when several rollers look similar.
Confirm whether the requested part is a complete rubber-covered roller, a removable sleeve, or an existing core that needs a new covering. Also identify the machine type if there is any uncertainty between a two-piece can decorator and three-piece can printing equipment.
The correct component and its original specification should be established before selecting a replacement cover.
For broader printing-related roller applications, see Wolorin’s Walzen für die Druckindustrie behandelt.
Check Both Ink and Wash-Up Contact
An ink roller operates in contact with printing ink, but the same rubber covering may encounter a different chemical mixture during wash-up.
Notieren Sie die Tinten und Reinigungsmittel separat. Deren Produktnamen oder verfügbare technische Informationen sind hilfreich, um eine bestehende Abdeckungsspezifikation zu bestätigen.
For example, a roller may have worked normally with the original ink and cleaner, then developed a tacky surface after a new wash-up liquid was introduced.
If the surface change appeared after cleaning and followed the product switch, the cleaner is worth checking against the rubber compound.
A similar change following a switch of ink calls for a review of the ink contact instead.
The timing of the change is useful evidence. It helps identify which exposure needs attention without assuming that every change in print performance comes from the rubber.
Two covers with the same general rubber material designation can still behave differently because their compounds and actual exposure conditions differ.
When the existing covering has remained stable through normal printing and cleaning, its proven specification is a practical starting point for replacement.
What Can the Old Roller Tell You?
The old covering helps determine whether its original specification can be repeated or needs further review.
Swelling or Surface Deformation
A swollen cover may have a larger effective diameter or an uneven surface profile.
Compare its present condition with the original drawing or a sound reference roller. The specified finished diameter should be used for replacement when the old rubber has changed shape.
If swelling appeared after a change in ink or cleaner, include the relevant chemical exposure in the cover review.
Uneven Wear
Wear concentrated near one end or across a narrow band may leave different contact conditions along the roller face.
For an ink form roller, compare the worn area with the corresponding plate-contact position. Check the original roller profile and mounting arrangement before reproducing the covering.
If successive covers develop similar wear in the same location, the contact arrangement deserves attention alongside the replacement specification.
Changes in Print Appearance
Poor color or uneven ink transfer alone provides limited evidence of rubber failure.
If the covering remains physically sound and its dimensions are stable, the ink and machine conditions should be checked before specifying a different rubber compound.
When the old cover is visibly swollen, damaged, or unevenly worn, its condition provides a more direct basis for roller-related review.
Retain the original hardness and surface-finish requirements where available. Measurements taken from deteriorated rubber may no longer represent the intended specification.
Match the Original Dimensions and Mounting
The replacement must fit the original machine arrangement. Confirm the required component before preparing its manufacturing dimensions.
For a complete rubber-covered roller, the main references are the finished outside diameter, rubber face length, overall length, and shaft-end drawing.
Rubber face length describes the working covering. Overall length includes the shaft extensions. The finished outside diameter is measured over the rubber, while the core diameter refers to the underlying metal body.
The shaft ends need equal attention. A roller with the correct rubber dimensions can still be unsuitable if the bearing seats, shoulders, or locating features differ from the original part.
Some decorators use removable sleeves or quick-change arrangements. These designs are specific to the equipment and OEM. A replacement sleeve must match the original bore, outside diameter, length, and mounting features.
For a new covering on an existing core, confirm the core condition, required cover thickness, bonding requirements, and finished diameter.
If the old rubber is swollen or heavily worn, take the manufacturing dimensions from the original drawing or another reliable specification.
A complete drawing normally provides a direct basis for quotation. Photos of both shaft ends or the sleeve mounting can help clarify missing construction details.
What Information Helps Confirm Your Replacement?
| Information | What it helps confirm | Was man senden soll |
|---|---|---|
| Roller number and position | Identifies the exact rubber-covered roll and its contact position. | OEM part number, machine model, or installed-position photo. |
| Tinten- und Spülmittel | Establishes chemical exposure when the cover has changed. | Product names and details of recent changes. |
| Old cover condition | Shows whether the original covering remains a suitable replacement reference. | Photos of swelling, uneven wear, or surface damage. |
| Dimensions and mounting | Confirms the required construction and machine fit. | Drawings, available dimensions, or shaft-end and sleeve photos. |
Send Wolorin your ink roll number, drawings, dimensions, samples, or existing specifications for custom manufacturing and quotation. If details are incomplete, start with a roller-position photo, old-cover condition, or the ink and cleaner involved.