At Bales, we tackle common and complex surface finishing challenges with innovative solutions. Our engineers pay attention to every detail of your project — whether preparing the mold of a highly visible injection molded part or readying your tool or die for release, abrasion, or corrosion applications. No matter the desired finish, you’ll receive a quality job that meets SPE-SPI Standards and upholds to the tightest tolerances, which is critical for optimal mold performance and product functionality.
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|TYPES OF FINISHES||FINISH REFERENCE NUMBERS||ROUGHNESS COMPARISON|
|DIAMOND||#3 Diamond Buff||A1||0-1|
|#6 Diamond Buff||A2||1-2|
|#15 Diamond Buff||A3||2-3|
|DRY BLASTED||#11 Glass Bead||D1||10-12|
|240 Aluminum Oxide Blast||D2||26-32|
|#24 Aluminum Oxide Blast||D3||190-230|
This is where we make you shine, to whatever degree you desire.
Accurate mold polishing requires a partner with the knowledge of what questions questions must be asked and the skill to match your desired specifications. When working with Bales, you tap into four decades of mold polishing experience, resulting in a uniform surface finish to optimize your part performance.
Selecting the best surface finish is key to solving common manufacturing issues, including:
Part sticking - the right finish will enable easier release from the mold
Part retention - blast finishes can be used in lieu of undercuts and mechanical detents to aid in part retention when required
Imperfections and inconsistencies - mold polishing can create a uniform finish that removes tool and machining marks and hides imperfections
Diamond polishing results in the finest finish on molds and components to produce highly visible or lens quality parts. The SPI* A-2 is the most widely used diamond finish, providing good release and good visual parts. An SPI A-3 is a fine choice for release where a high-gloss appearance is not required. All diamond finishes work well with chrome and nickel coatings.
*SPI® is a registered trademark of Plastics Industry Association (PLASTICS)
Next to diamond polishing, paper finishes are the second most refined finishes available. Paper finishes can produce a slightly reflective or glossy shine and very good release. They are often recommended for products that do not require a decorative or visual impact.
The most economical finish, stone finishes are also the first step in the process of paper and diamond polishing. Stone finishes provide good release, but deliver very little gloss to the plastic part. This is a good choice for strictly functional molded parts where aesthetics are of no importance.
When done properly, blasted finishes can produce some of the most interesting stipples and textures on mold surfaces. From a fine satin texture with varied degrees of gloss to a flat, no-gloss coarse stipple, Bales has the blast media to produce the proper finish for you. Blast finishes are also an excellent way to camouflage weld repairs and slight imperfections.
In order to achieve a quality finish, you must start with a clean foundation. Blasting is effectively used to camouflage weld areas, cleaning, and prepping parts for processing or to achieve a desired surface finish. Our blasting process works on a variety of shapes, sizes and materials due to controlled velocity, pressure and location as specific areas can be appropriately masked.
At Bales, we use the following abrasive media for our blasting services: