1. What is an Injection Molding Price Calculator?

Definition: This calculator estimates the total cost of injection molding based on material costs and machine time.

Purpose: It helps manufacturers and product designers estimate production costs for plastic parts.

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 runs, and comparing manufacturing options.

4. Using the Calculator

Tips: Enter the material weight in pounds, material price per pound (default $0.50), cycle time in hours, 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, energy costs, and operator wages.

Q2: How do I determine cycle time?
A: Cycle time depends on part size, material, mold complexity, and machine parameters. Consult your molding technician.

Q3: What's a typical material price range?
A: Common plastics range from $0.30-$2.00/lb, with engineering resins costing up to $10/lb or more.

Q4: Does this include mold costs?
A: No, this calculates per-part production costs only. Mold costs should be amortized separately.

Q5: How accurate is this estimate?
A: It provides a baseline estimate. Actual costs may vary based on setup, scrap rates, and secondary operations.