ASTM D790 Flexural Test Mold

ASTM D790 flexural test bar mold for APSX-PIM. Ready-to-use with pre-installed hardware. Produces standard 4.28" x 0.50" x 0.125" samples. Includes thermal gap design for cooling.

$500

Ejector Pin Option

Yes $1,750

No $500

Prices follow supplier cost and stock availability and are updated regularly. The price you see is today's price — once you order, it's held for 7 days.

Install + training included Tailored service plan

Bridge toshort-run molding

<24engineer response

Demo firstmold your part before you buy

Same-weekservice dispatch

Built for production teams

What your process engineer actually checks

From printed prototype to molded part

We use injection molding to bridge our own printed prototypes into short runs, so install includes validated parameters for your resin and tooling guidance. The team that trains you actually molds parts — not a distributor reading a manual.

An applications engineer on the line

Questions on tooling, shot size, cycle times, or pellet selection? A named applications engineer answers directly. Most replies in under 4 hours, NDA standard.

About this product

This is a ready-to-use, standard-size aluminum mold designed specifically for producing plastic test bars for ASTM D790 Flexural (Bend) Testing. The mold comes fully assembled with all necessary hardware, allowing you to start producing consistent, high-quality test samples immediately upon installation.

Core Specifications:

Mold Frame Dimensions: 4.8″ W × 6.0″ H × 2.0″ D
Sample Part Size: 4.28″ L × 0.50″ W × 0.125″ Thick (Standard ASTM D790 Specimen)
Compatibility: Designed for use with the APSX-PIM series injection molding machines.

What’s Included:

CNC-machined 6061 aluminum mold with pre-installed alignment pins and bushings.
Four (4) shoulder bolts (for left-side mounting).
One (1) set of clamping claws (for right-side mounting).
- Note: Orders for multiple molds include only one set of claws.

Key Features & Benefits:

Pre-Installed Hardware: Alignment pins, bushings, shoulder bolts, and claws are installed. No assembly is required; you can mount it and begin production.
Integrated Thermal Management: The shoulder bolts are engineered to be intentionally longer. This creates a small insulating air gap between the mold and the machine’s nozzle plate when unclamped, helping to keep the mold cooler and improve cycle times.
Precision Alignment: The tight-tolerance pins and bushings ensure perfect alignment of mold halves for consistent part quality and flash-free samples.

Installation & Usage Instructions:

Mounting: Secure the left side of the mold using the four included shoulder bolts. Secure the right side using the provided claws.
Orientation: Ensure the upper side of the mold is flush with the upper side of Block 4 on the APSX-PIM machine.
Alignment Check:
- Use the machine’s manual control buttons to initiate the clamping cycle.
- HALT the machine immediately as the mold halves begin to mate.
- Important: The pins and bushings are a tight, press-fit. They must be seated using the machine’s clamping force or a manual press. Do not attempt to press them together by hand.
Operation: Once aligned, complete the clamping cycle. The mold will make full contact with the nozzle plate only at the end of the clamp stroke, eliminating the insulating gap for the injection phase.

Running a different press? We’ll fit it.

These ASTM molds are configured for the APSX-PIM, but we also machine ASTM tensile, flexural and impact molds (D638, D790, D256) to fit third-party injection-molding machines — BOY, Arburg, Wittmann and others. Send us the mounting dimensions and nozzle/sprue location from a mold you run today, and we’ll CNC one to match. Standard and custom builds welcome.