Mold Plates | Precision Grinding, Inc.

PGI Steel is "The Single Source Solution for Custom Steel Plate."

Contact Us Today! 1-888-934-7463 or

Steel Mold Plates

Steel Molds

Steel Molds

Tool & Die Molding

Steel Molding Dies allow manufacturers to shape pliable raw materials, such as ceramic materials, composite materials, metals, plastic materials, rubber, and material liquid mixtures through compression, injection, and pressure molding processes.

Mold Base Frames, Mold Cavities, Mold Cores

Usually cut from a pre-hardened die, mold, or tool steel such as 4140 PH, 4340 PH, or P20, mold base frames normally separate into two sides at a parting line allowing manufactured parts to be extracted. PGI Steel makes molding plates from 4140 and 4340 steel, typically in the Rockwell hardness ranging from 28 – 32 to upward of 38 – 45.  These parts provide a long lifespan as they are extremely wear resistant.

Die Molds

These round, OD ID rings were cut from 4140 steel, ground, and machined to build a metal mold set.

These steels can handle the high melting points of the composite liquids or resins poured into these forming cores. Typically, a releasing agent precedes the pouring step in order to facilitate removal of the hardened part from the mold.

PGI Steel provides contract mold making services to manufacturers and job shops serving various industries such as automotive, aerospace, and industrial applications. As the mold maker, we flame cut the mold plates to shape from inventory, rather than saw-cutting  pre-hardened steel flats. Prior to grinding or machining 4140 steel, we may anneal the preliminary mold plates within our in-house car-bottom furnace.

In the case requiring cavities or core drills, we can pre-grind the plates to specified tolerance levels upon one of several Blanchard and Mattison grinders. Depending upon the machining required and the desired hardness, we allow for tempering and quenching in addition to providing annealing services.  We quench and temper 4140 up to approximately 50 Rockwell hardness.

Complex CNC Machining Available

PGI Steel offers CNC machining services to create the crevices, grooves and holes that make the final shaped mold products. Also, Blanchard grinding offers the critical surface flatness tolerances.  Often times, we finish these plates on one of our close tolerance (±0.001) surface grinders prior to undergoing final inspection.

Molding plates are often times individually custom made in pairs for high precision manufacturers, working with composite ceramics and plastics, who require the high degree of accuracy that we provide, while being able to completely manufacture molding dies within our own facilities.


Mold Guiding Components – Distributor

Danly Replacement Parts Compression Springs Bushings
Lamina Replacement Parts Ball Bearing Components Pins
Mold Component Parts Plain Bearing Components Guide Posts


Complete Quick Change Mold Systems

QCM Plates Quick Molds Steel Molds
QCM Systems Quick Die Molds
Quick Change Systems Quick Change Molds Mold Plates


Request a quote

© 2016 Precision Grinding, Inc. All Rights Reserved.
/* ]]> */