Chen Way Machinery Co., Ltd. - Chen Way Blow Molding Machine Manufacturer | Multi-Layer Blow Molding Solutions from Taiwan

Semi-Automatic Stretch Blow Molding Machine | Chen Way

Semi-automatic reheat stretch blow molding machine with a rotary infrared oven for clear PMMA, PS, AS and PETG goblets, kettles, jars and food storage containers.

Semi-Auto Stretching Blow Molding Machine

Two-step reheat and stretch blow process for transparent product production

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Semi-auto Stretching Blow Molding Machine

Semi-auto Stretching Blow Molding Machine

The Semi-Automatic Stretch Blow Molding Machine is a piece of equipment that combines blow molding and stretch molding technologies. It is primarily used to manufacture hollow plastic products that require high precision, structural stability, and excellent transparency. Typically featuring preheating, stretching, blowing, and cooling functions, this machine uses manual or simple mechanical loading and unloading, offering high operational flexibility and lower costs, making it suitable for enterprises with small- to medium-production needs.

Operating Principle

The process begins by placing plastic preforms into an oven to soften them. Once heated to the appropriate temperature, they enter the mold for blow molding, where the plastic preform uniformly conforms to the mold, creating the desired shape. After cooling and setting, the product is complete. The stretching process significantly increases the molecular alignment density of the plastic, resulting in higher mechanical strength and transparency.

Applications

The most typical applications involve materials such as PMMA, PS, AS, PETG, and Tritan TX1000 to produce daily necessities such as goblets, teapots, sports water bottles, storage jars, and food containers. These products must possess good pressure resistance, airtightness, and aesthetic quality—requirements that stretch blow molding technology perfectly meets.

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This semi-automatic stretch blow molding machine is currently operating stably at our customer’s factory in Russia. According to customer feedback, the yield rate of their previous China brand equipment was only half that of our machine. Since switching to our equipment, they have significantly reduced scrap material loss, while the intuitive user interface and precise heating control have markedly improved overall production efficiency.The customer is highly satisfied with the machine's "high yield, high productivity" performance, which has not only shortened the ROI period but also enhanced their competitiveness in the local packaging market. Based on the outstanding performance of the first unit, the customer expressed a need for expansion and has already purchased a second machine, demonstrating their profound trust in our molding technology.



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Reheat Stretch Blow Molding for Clear Products

This semi-automatic machine uses a two-step process. A rotary oven with infrared heaters softens the preforms, which are then stretched and blown in the mold; stretching aligns the polymer and gives clearer, stronger walls. Unlike extrusion blow molding, the process starts from injection-molded preforms rather than an extruded parison, and preforms are loaded and products removed manually or with simple mechanical help.

That manual handling suits small and medium production volumes. Typical materials are PMMA, PS and AS, with PETG and Tritan copolyester also listed, for goblets, kettles, sports water bottles, storage jars and food containers. Preform design, product volume and required clarity are the main inputs for the heating profile and mold layout. For opaque food containers, the food container application compares the extrusion route; send preform and product drawings with your inquiry to request a trial plan.