Precision Tool And Mould Building

Precision Tool & Mould Building

Well-designed molds are the foundation of successful parts. Manufacturability and lifecycle costs are determined in this complex and precise process, which adheres to the exact specifications of the part while considering key mold design components.

In addition to reducing cost, increasing quality, and optimizing performance, proper mold design and mold building are among our Five Keys to Success. As part of our mold development process, we use the latest CAD technology and software to ensure that a robust mold design is built to meet SPI standards, as well as moldflow analysis to review all mold designs and parts.

Efficiency, Longevity and Performance

Mold trial and qualification processes ensure that all part dimensions are accurate. Scientific injection molding, consistency, and repeatability are established to produce quality parts. Following that, each dimension of the
part is reviewed for accuracy.

To increase production throughput while controlling production costs, look to us for advanced molding solutions:

Our Core Molding Solutions

Stack molds

A series of interconnected, same-sized molds which are “stacked” next to each other. Without increasing the plastic injection molding machine platen size or tonnage, stack molds double the number of cavities producing parts (more for three-and four-level stack molds). Stack molds can also have different cavities in each mold parting surface to produce a family of parts per shot.

Gas-assist molds

In gas assist plastic injection molding, the pressurized gas follows the path of least resistance and displaces the plastic material in the thicker areas of the part, leaving hollow sections for reduced material use and part weight. This technique reduces warpage, shrinking, surface blemishes, sink marks and internal stress.

Unscrewing cores

Parts requiring threading can be put in an unscrewing mold, where the core rotates and applies the threading before the mold fully opens. The amount of threading on the part dictates how many rotations are necessary and the length of the core that is inserted into the mold.

High cavitation molds

The part design, end use and production volume are a few of the variables taken into account to decide the right mold cavitation for the project. High cavitation molds reduce the price per part and generate more product per shot.

Conformal cooling

Conformal cooling channels are incorporated into a mold and follow the its shape, reaching hot spots and promoting temperature uniformity throughout the parts being manufactured. Incorporating this solution yields faster cooling and cycle times and improves part quality, CPK values and part sink.

Mold Trials and Qualification

All new plastic injection molds are subjected to mold trial and qualification in order to verify all part dimensions and mold functionality are accurate. To ensure consistent quality parts at lower costs, WEISS Precision uses scientific injection molding to establish consistent, repeatable parameters for the plastic injection molding process.

Scientific Injection Molding

Scientific injection molding involves establishing predictable, repeatable plastic injection molding parameters using predictable facts and data. With a focus on part design, mold design, material selection, and measurements of plastic injection molding process parameters, WEISS Precision systematically controls variables that could result in defective parts.


Transfer Programs

WEISS Precision has successfully managed numerous mold transfer programs –from one mold to many molds – inspecting and evaluating the molds and getting them up and running quickly and cost effectively. Our program managers oversee the entire process and keep customers informed each step of the way.

Mold Maintenance Programs

Plastic injection molds are an important asset and regular maintenance is important for longevity of the mold and quality of the parts it produces. Weiss Precision mold maintenance programs are customized on the basis of mold design, complexity and material, and typically include daily preventative maintenance, mold inspection and minor and more major mold maintenance.

Mold Building and Tooling

Our dedicated facility helps us maintain our European standards and European program management while keeping costs down.

  • Molds are proudly built and sampled in INDIA
  • No loss in time because while we are waiting for the mold, part layouts are already in progress
  • The final Production Part Approval Process (PPAP) is completed at the manufacturing facility