Product Overview
This high-efficiency 1×4 cavity injection mold set is purpose-built for mass production of 2.5oz Play-Doh cups and matching lids. The set includes two molds: one for the PP plastic cup body and one for the LDPE lid, both featuring hot runner point gates, 1.2083 steel construction (HRC48-52), and full front/back mold polishing. Optimized for children’s toy packaging, these molds ensure consistent dimensional accuracy, leak-proof fit, and long service life for high-volume production.
Core Mold Specifications
| Item | 2.5oz Cup Mold | 2.5oz Lid Mold |
| Product Name | 2.5oz Play-Doh Cup Injection Mold | 2.5oz Play-Doh Lid Injection Mold |
| Molded Material | PP (Polypropylene) | LDPE (Low-Density Polyethylene) |
| Cavity Configuration | 1×4 (4 parts per cycle) | 1×4 (4 parts per cycle) |
| Shrinkage Rate | 1.014 | 1.014 |
| Gate Type | Hot Runner Point Gate | Hot Runner Point Gate |
| Core/Cavity Steel | 1.2083 (HRC48-52) | 1.2083 (HRC48-52) |
| Surface Treatment | Front & Back Mold Polished | Front & Back Mold Polished |
| Key Features | High clarity, food-safe, leak-proof fit | Flexible seal, easy snap-on fit, durable |
| Application | Play-Doh modeling compound storage packaging | Matching sealing lid for 2.5oz cup |
![1*4 Cavity Mold Hot Runner Pin Gate injection mold]( "1*4 Cavity Mold Hot Runner Pin Gate injection mold")
Key Mold Design & Technical Advantages
1. 1×4 Multi-Cavity High-Volume Production
Both molds feature a 1×4 cavity design, producing 4 cups or 4 lids per injection cycle. This configuration maximizes production efficiency, reduces unit costs, and ensures uniform filling across all cavities. The balanced runner layout eliminates part-to-part variation, guaranteeing consistent dimensions for a perfect cup-lid fit every time.
2. Premium 1.2083 Steel Construction (HRC48-52)
The core and cavity of both molds are crafted from 1.2083 stainless steel, heat-treated to HRC48-52. This steel grade offers exceptional wear resistance, corrosion resistance, and polishability, ideal for high-volume toy packaging production. It withstands repeated molding cycles without surface degradation, maintaining the polished finish required for clear PP cups and smooth LDPE lids.
3. Hot Runner Point Gate System
Equipped with a hot runner point gate system, the molds deliver several key benefits:
Clean Molding: No cold runner waste, reducing material consumption and eliminating gate trimming operations.
Balanced Filling: Precise melt flow control prevents short shots, sink marks, or warpage, even in thin-walled cup and lid structures.
Low Shear Stress: The gate design minimizes shear heat buildup, preserving the clarity of PP and the flexibility of LDPE for optimal product performance.
4. Fully Polished Mold Surfaces
Both molds undergo full front and back mold polishing, ensuring:
PP Cups: Crystal-clear, smooth inner and outer surfaces, free of flow lines or haze, suitable for showcasing the Play-Doh inside.
LDPE Lids: Uniform, smooth surfaces with no burrs, ensuring a tight, leak-proof seal when snapped onto the cup.
Molded Product Features
2.5oz PP Play-Doh Cup
Food-Safe Material: Made of PP plastic, safe for contact with modeling compounds and children’s toys.
Clear Clarity: Polished mold finish results in transparent cups, allowing easy visibility of contents.
Structural Integrity: Optimized wall thickness for durability, with consistent dimensions to fit the matching lid perfectly.
2.5oz LDPE Play-Doh Lid
Flexible Seal: LDPE material provides a soft, tight fit to prevent the cup from opening accidentally.
Child-Safe Design: Smooth edges and easy snap-on/off functionality, suitable for children’s use.
Brand Compatibility: Molded to match Play-Doh’s standard lid design, ensuring consistent branding across packaging.
Mold Performance Comparison
| Feature | Our 1×4 1.2083 Mold Set | Standard Toy Packaging Mold |
| Cavity Efficiency | 1×4 high-volume production | ≤2 cavities, low output |
| Steel Grade | 1.2083 stainless steel (HRC48-52) | Generic P20 steel, prone to wear |
| Gate System | Hot runner point gate, no trimming | Cold runner, requires manual trimming |
| Surface Finish | Fully polished, clear/smooth parts | Basic finish, flow lines common |
| Material Compatibility | Optimized for PP & LDPE toy-grade plastics | Not tailored for food-safe children’s packaging |
| Service Life | 500,000+ shots with consistent quality | Prone to surface degradation over cycles |
Applications & Benefits
This mold set is designed exclusively for manufacturing 2.5oz Play-Doh modeling compound packaging, offering key benefits for toy and craft product manufacturers:
Consistent Quality: Perfect cup-lid fit ensures leak-proof storage and child-safe packaging.
Cost Efficiency: High-volume 1×4 cavity design reduces per-unit costs for mass production.
Regulatory Compliance: Food-safe materials and mold design meet children’s toy packaging safety standards.
Brand Consistency: Polished surfaces and precise dimensions align with Play-Doh’s official packaging specifications.
Quality & Compliance
All molds are manufactured with strict CNC precision machining, heat treatment, and quality validation. Every mold undergoes trial runs to verify dimensional accuracy, gate performance, and surface finish. We provide complete documentation, including steel material certificates, mold validation reports, and process records, to support customer product safety and regulatory compliance.
FAQ
Q1: Why use 1.2083 steel for these molds?
A1: 1.2083 stainless steel offers excellent wear resistance and polishability, ideal for maintaining the clear finish of PP cups and smooth seal of LDPE lids over high-volume production cycles.
Q2: What are the benefits of the hot runner point gate system?
A2: It eliminates cold runner waste, reduces material costs, and ensures clean, balanced filling for consistent part quality, with no need for manual gate trimming.
Q3: Are these molds compatible with food-safe plastic grades?
A3: Yes, they are optimized for food-safe PP and LDPE materials, suitable for children’s toy packaging applications.
Q4: What is the expected service life of this mold set?
A4: With proper maintenance, the 1.2083 steel molds support 500,000+ shots each, maintaining consistent quality throughout their lifespan.
