1. What is an Injection Mould Cost Calculator?

Definition: This calculator estimates the cost of injection molding based on material weight, material price, cycle time, and machine hourly rate.

Purpose: It helps manufacturers and product designers estimate production costs for plastic parts made through injection molding.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( C \) — Total cost ($)
• \( M \) — Material weight (lb)
• \( P \) — Material price ($/lb)
• \( T \) — Cycle time (hr)
• \( H \) — Machine hourly rate ($/hr)

Explanation: The cost has two components: material cost (weight × price) and machine time cost (cycle time × hourly rate).

3. Importance of Injection Molding Cost Calculation

Details: Accurate cost estimation helps in pricing products competitively, budgeting for production, and making design decisions.

4. Using the Calculator

Tips: Enter material weight in pounds, material price per pound (default $2.50), cycle time in hours (default 0.25), and machine hourly rate (default $75). All values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: What's included in the machine hourly rate?
A: This typically includes machine depreciation, maintenance, labor, and overhead costs.

Q2: How do I determine cycle time?
A: Cycle time depends on part size, complexity, and material. Consult with your molding machine operator or use industry standards.

Q3: What's a typical material price range?
A: Common plastics range from $1.50-$5.00/lb, with engineering-grade materials costing more.

Q4: Does this include mold/tooling costs?
A: No, this calculates per-unit production costs only. Mold costs are typically amortized separately.

Q5: How can I reduce injection molding costs?
A: Optimize part design for manufacturability, reduce material usage, and minimize cycle time.