Injection Molding & Injection Blow
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Target Customers

Manufacturers of preforms and caps; companies producing pharmaceutical, cosmetic, and food packaging; manufacturers of household plastic goods and plastic components.
Key Pain Points

Difficulty in process selection

Unclear application scenarios for injection molding vs. injection blow molding; challenging decision-making regarding equipment selection.

Complexity in parameter matching

Difficulties in calculating parameters such as clamping force, shot weight, and number of cavities.

Insufficient molding precision

Challenges in meeting standards for neck finish precision, wall thickness uniformity, and surface quality.

High waste costs

Excessive waste from runners and gates; low material utilization rates.

Low mold-change efficiency

Time-consuming mold changes impacting production efficiency for diverse product lines.

Fragmented procurement

Separate purchasing of machines and molds leads to high coordination costs and long lead times.

Molding Process Selection
1

Injection Molding

Suitable for PET preforms, caps, pipe fittings, household plastic products, packaging components, and other solid or structural plastic parts.

Key considerations: Product weight, plastic raw material, clamping force, shot weight, mold dimensions, number of cavities, and cycle time.

Injection Blow Molding

Suitable for small hollow containers requiring high precision in neck finish, superior surface quality, and consistent wall thickness.

Ideal applications: Pharmaceutical bottles, health supplement bottles, cosmetic containers, food containers, and other small, precision plastic bottles.

2

Comparison Criteria

Injection Molding

Injection Blow Molding

Applicable Products

Preforms, caps, pipe fittings, household goods

Pharmaceutical bottles, cosmetic bottles, precision containers

Product Structure

Solid or thick-walled structures

Hollow, thin-walled structures

Neck Precision

General-purpose

High (no secondary trimming required)

Scrap Generation

Runner scrap is recyclable

No runner waste; high material utilization rate

Key Equipment

Injection molding machine

Injection blow molding machine

Customized Solution Process

Product Structure Analysis

Evaluate product wall thickness, geometric complexity, and functional requirements

Raw Material & Molding Process Confirmation

Select plastic raw materials and determine the injection molding or injection blow molding process route

Equipment Selection

Match appropriate equipment models and specifications

Clamping Force & Injection Parameter Calculation

Precisely calculate key parameters such as clamping force and shot weight

Mold Design & Manufacturing

Execute mold fabrication using in-house CNC equipment

Integrated Machine & Mold Testing

Conduct joint testing and commissioning of the machine and mold

Sample Confirmation

Submit trial-produced samples to the customer for approval

Delivery & Installation

Ship equipment and perform on-site installation

Operation Training & Technical Support

Provide systematic training and long-term technical support

Customized Solution Process

PET Preform and Bottle Cap Production

Suitable for producing PET preforms, plastic bottle caps, and packaging accessories; injection molding machines and molds are configured based on product weight and cavity count.

Pharmaceutical Bottle Production

Suitable for tablet bottles, health supplement bottles, oral liquid packaging, and other containers requiring high precision in neck dimensions and wall thickness.

Cosmetic and Personal Care Packaging

Suitable for lotion bottles, cosmetic containers, roll-on bottles, and other packaging requiring superior aesthetic and surface quality.

Daily Plastic Product Manufacturing

Suitable for household goods, pipe fittings, packaging accessories, and various other injection-molded products.

Cases
Zhangjiagang Huili Machinery Co., Ltd. is very professional in the research , development, design and manufacture of plastic machine, with more than 20 million fixed assets.

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