公开(公告)号：US5279707A

公开(公告)日：1994-01-18

申请号：US965997

申请日：1992-10-23

Applicant: Andrew D. Ruse

Inventor： Andrew D. Ruse

IPC: B29C33/72 ,  B29C33/74 ,  C11D7/08 ,  C23G1/08 ,  B44C1/22 ,  C23F1/00 ,  C23G1/02

CPC classification number: C11D7/08 ,  B29C33/722 ,  B29C33/74 ,  C23G1/083

Abstract: An aqueous solution is provided for removing undesirable "heat discoloration" characteristics from a mold surface, the solution consisting essentially of about 17% to 21% by weight phosphoric acid and about 1% of non-ionic surfactant, the remaining portion being substantially water, with a small amount of colorant and/or fragrance being optionally added as desired. The method of use includes applying the solution to a mold surface of a mold half, the mold surface having undesirable "heat discoloration" characteristics thereon caused while heating the mold half for repair, and removing any residue after about 30 seconds or less thereafter. In particular, the undesirable "heat discoloration" characteristics normally occur after heating the mold half during the process of repairing a damaged mold surface or reworking a mold surface requiring an engineering change. The undesirable "heat discoloration" characteristics require removal to prevent blemishes from being formed on a plastic part during molding of the plastic part, or non-uniform release caused by sticking of the plastic molded part to the mold surface during molding. Optimally, the solution is manually brushed on so that it can be applied as desired to particular mold areas such as those including crevices, depressions and/or mold shutoff areas, and wiped off after several seconds.

Abstract translation: 提供了一种用于从模具表面去除不需要的“热变色”特征的水溶液，该溶液基本上由约17％至21％重量的磷酸和约1％的非离子表面活性剂组成，其余部分基本上为水， 根据需要可选地加入少量着色剂和/或香料。 使用的方法包括将溶液施加到半模的模具表面，模具表面在加热半模以进行修理时在其上引起不期望的“热变色”特性，并且此后在约30秒以后除去任何残留物。 特别地，在修复损坏的模具表面或重新加工需要工程改变的模具表面的过程中，通常会在加热模具半部之后发生不期望的“热变色”特性。 不合需要的“热变色”特征需要去除，以防止在塑料部件模塑期间在塑料部件上形成瑕疵，或者在模制期间由塑料模制部件粘附到模具表面引起的不均匀的脱模。 最佳地，手动刷洗该溶液，使得其可以根据需要施加到特定的模具区域，例如包括缝隙，凹陷和/或模具截止区域的模具区域，并在几秒钟后擦去。