vormontlastende

Vormontlastende is a term used in Dutch manufacturing and toolmaking to describe a set of design features, processes, or agents that facilitate the removal of a formed workpiece from a mold, die, or other form. The concept is derived from vorm (shape/form) and onlasten (to unload or relieve). The goal is to reduce resistance during demolding, which can otherwise cause part damage, deformation, or tool wear.

In plastic injection molding, vormontlastende measures include adequate draft angles, generous parting lines, and smooth radii, as well as the use of mold release agents or coatings. Similar principles apply to metal casting and sheet forming, where features such as collapsible cores, segmented cores, or flexible inserts reduce undercuts and sticking.

Effective vormontlastende design requires balancing demolding ease with functional requirements of the part, such as wall thickness, strength, and surface quality, and with production constraints like cycle time and mold complexity. Poor demolding can lead to defects such as warpage, scratches, or incomplete parts, and may increase downtime for mold maintenance.

Limitations include increased mold complexity and cost, potential residue from release agents, and possible impact on surface finish or part dimensions if not properly controlled.

See also: demolding, mold design, draft angle, mold release agent.