4-Cavity PET Stretch Blow Molding Machine
4-Cavity PET Stretch Blow Molding Machine
The 4-Cavity PET Stretch Blow Molding Machine is a precision-engineered industrial packaging system designed for the automated, high-efficiency production of polyethylene terephthalate (PET) bottles and containers. Utilizing a two-stage stretch blow molding (SBM) process, this machinery takes pre-heated PET preforms and expands them into finished hollow containers through synchronized axial mechanical stretching and high-pressure air injection.
Engineered for small-to-medium scale beverage producers, contract packaging lines, and dedicated container manufacturing plants, this 4-cavity system balances throughput requirements with operational flexibility, supporting a wide range of container geometries-from mineral water and carbonated soft drink bottles to food jars and personal care packaging.
Key Product Features
Precise Infrared Thermal Management: Equipped with adjustable lamp zones and forced air-cooling loops to ensure uniform preform wall temperature distribution, preventing crystallization flaws and maintaining optimal material orientation during blowing.
Synchronized Stretching and Blowing: Employs a pneumatically or servo-driven stretch rod combined with dual-stage high-pressure air blowing to ensure consistent axial elongation and radial expansion, optimizing bottle wall thickness uniformity.
User-Friendly PLC Control Interface: Integrates an industrial touch-screen HMI for real-time cycle parameter adjustments, production recipe storage, fault diagnostics, and operational monitoring.
Rapid Mold-Change Engineering: Designed with standardized quick-clamp mechanisms to minimize downtime during mold and neck-insert transitions between different bottle formats.
Heavy-Duty Structural Integrity: Constructed with a high-rigidity machine frame designed to absorb high clamping forces and repetitive impact loads during continuous, high-speed production cycles.
Technical Specifications
|
Specification Category |
Parameter / Detail |
Impact on Buyer Selection |
|
Machine Type |
PET Stretch Blow Molding Machine (Two-Stage) |
Ensures compatibility with pre-formed PET resin components, delivering superior clarity, tensile strength, and gas barrier properties compared to extrusion blow molding (HDPE/PP). |
|
Cavity Count |
4 Cavities |
Directly dictates theoretical output capacity per cycle, aligning with medium-volume production targets (typically ranging from 3,500 to 4,500 bottles per hour depending on bottle size). |
|
Supported Material |
PET (Polyethylene Terephthalate) Preforms |
Requires precision injection-molded preforms matching specific neck finishes, weights, and thermal profiles. |
|
Control System |
PLC with Industrial Touch Screen HMI |
Facilitates precise recipe management, tuning of stretch speed, and tracking of operational metrics. |
|
Utility Requirements |
• Power Supply: 3-phase, custom voltage available • Air Pressure: High-pressure (approx. 2.5 - 3.0 MPa) & Low-pressure (approx. 0.8 - 1.0 MPa) • Cooling Water: Stable temperature control unit required |
Essential facility infrastructure parameters that must be verified against plant utility capabilities prior to installation. |
Available Configurations and Options
Standard Equipment: Base 4-cavity blow molding machine unit, integrated PLC touch-screen control panel, standard lamp-zone heating oven, and primary electrical safety enclosures.
Optional Configurations:
Automated Preform Loader / Unscrambler: Feeds preforms into the heating hopper automatically to reduce manual labor.
High-Pressure Air Compressor Package: External booster compressor integration for supplying consistent high-pressure blowing air.
Industrial Chiller Unit: Dedicated closed-loop water chiller to stabilize mold cooling temperatures and cycle times.
Custom Mold Tooling Sets: Tailored mold cavities and neck inserts machined to exact buyer 3D container designs.
Applications
Beverage Industry: Production of carbonated soft drink bottles, purified water, mineral water, functional drinks, juices, and teas.
Food & Condiment Packaging: Manufacturing of wide-mouth and narrow-neck jars and bottles for edible oils, sauces, dressings, and dry goods.
Personal Care & Household: Containers for liquid soaps, shampoos, detergents, cosmetics, and surface cleaning formulas.
Pharmaceutical & Chemical: Small-batch, high-precision production of specialty plastic bottles meeting strict dimensional tolerances.
Product Selection Considerations
When evaluating a 4-cavity PET stretch blow molding machine for a production line, procurement engineers and plant managers should carefully review:
Preform Compatibility: Check that the neck finish standard (e.g., PCO 1810, 1881, 30/25), gram weight, and preform length match the physical constraints of the mold clamping and stretching units.
Container Volume and Geometry: Confirm that the maximum bottle volume, base diameter, and overall height fit within the 4-cavity mold clearance envelope.
Production Output Targets: Calculate required hourly and daily output. A 4-cavity system is ideal for small-to-medium batches or dedicated line expansions; higher volume lines may require 6, 8, or more cavities.
Utility Infrastructure: Verify that local factory electrical supply, compressed air lines, and water chilling capacities meet the peak operational demands of the machinery.
Quality Inspection and Testing
Factory Acceptance Testing (FAT): Prior to shipment, the machine undergoes dry-run cycling and system integrity checks. Comprehensive inspection reports detailing pneumatic pressure tests, electrical safety checks, and mechanical alignment verifications are available upon request.
Compliance Standards: Built to industrial safety and electrical compliance standards appropriate for export markets.
Customization, Warranty, and Supply Scope
Standard Supply Scope: 1 x 4-Cavity Stretch Blow Molding Machine, primary operational manual, and initial accessory toolkit.
Customization Services: Specialized electrical voltage adaptation, custom mold design from 3D drawings, and auxiliary equipment pairing.
Warranty & Support: Backed by standard manufacturer warranty covering core mechanical and electrical components, supplemented by remote technical troubleshooting and spare parts supply support.
Commercial Terms: Minimum Order Quantity (MOQ), exact lead times, shipping container dimensions, and delivery incoterms are established upon formal quotation confirmation.
FAQ
Q: What is the main difference between this stretch blow molding machine and an extrusion blow molding machine?
A: This machine uses a two-stage stretch blow molding (SBM) process optimized for pre-formed PET preforms, yielding high optical clarity, high tensile strength, and excellent gas barriers. Extrusion blow molding melts raw resin directly into a parison and is typically used for polyolefins like HDPE, LDPE, or PP.
Q: Can this 4-cavity machine handle different bottle sizes and shapes?
A: Yes, within the physical boundaries of the mold clamping area and frame envelope. Changing bottle shapes or sizes requires swapping out the mold tooling sets and updating the heating/blowing recipes on the touch screen.
Q: What preform specifications must I provide for custom mold design?
A: You should supply the preform neck finish standard (e.g., PCO 1881), preform weight in grams, overall preform length, and a 3D CAD drawing or physical sample of your desired final bottle.
Q: What auxiliary equipment is required to operate a complete production line?
A: To operate efficiently, you will need a low-pressure air compressor (for machine movements), a high-pressure air compressor or booster (for bottle blowing), an industrial water chiller (for mold cooling), and an automated preform loader or hopper.
Q: What technical details should I include when requesting an RFQ?
A: Provide your target container volume (ml/L), required output per hour, 3D bottle drawings, preform specifications (if already selected), your local factory power supply (Voltage/Phase/Frequency), and the destination port.
Request a Quotation
To receive a detailed commercial proposal, equipment layout drawing, and pricing for the 4-Cavity PET Stretch Blow Molding Machine, please submit the following specifications with your inquiry:
Target container volume and 3D drawing or technical specifications.
Preform details (neck finish, weight) if already sourced.
Expected production volume (bottles per hour).
Local plant power supply standards (e.g., 380V/50Hz/3Phase).
Destination seaport for freight calculation.
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