A. Extreme control over product appearance
No-weld-mark molding: In injection blow molding, the preform is molded by injection molding and blown in a closed mold, avoiding the weld marks caused by "preform docking" in split blow molding, and the surface smoothness of the product can reach Ra≤0.4μm (equivalent to a mirror effect). It is especially suitable for transparent products (such as PET cosmetic bottles and PC medicinal bottles), and can meet the requirements of high light transmittance and flawless appearance without subsequent polishing.
Precise control of shrinkage rate: Through the closed-loop temperature control system (barrel and mold temperature control accuracy ±1℃) and pressure compensation in the pressure holding stage (pressure holding time can be accurate to 0.1 seconds), compensation parameters can be preset for the shrinkage characteristics of different plastics (such as PP shrinkage 1.5%-2.5%, PET shrinkage 1%-1.5%), so that the product size tolerance is controlled within ±0.05mm (such as bottle mouth diameter error ≤0.03mm), ensuring the assembly accuracy with the bottle cap and pump head.
B. Two-way savings in energy consumption and raw material costs
Low-energy drive design: Using servo motors to drive the hydraulic system (instead of traditional asynchronous motors), energy consumption is reduced by 30%-40% - for example, when producing 500ml PP bottles, the servo-type injection blow molding machine consumes about 8-10 degrees of electricity per hour, while the traditional model requires 12-15 degrees. At the same time, the mold uses a fast heating/cooling system (such as a built-in thermal oil channel), and the heating time is shortened to less than 10 minutes, reducing the energy waste of preheating.
Reduce raw material loss: Compared with the split process of injection molding + blow molding, the injection blow molding machine does not require additional "preform tail material" (split blow molding requires cutting off the excess part of the preform, with a loss rate of about 5%-8%), and the raw material utilization rate can reach more than 98%. For high-priced raw materials (such as medical-grade PC and food-grade EVOH), this feature can significantly reduce the raw material cost of a single product.
C. Adaptability to the molding capability of products with "special-shaped structures"
One-step molding of complex inner cavity products: For products with special-shaped structures such as grooves, convex ribs, and beveled mouths (such as medicinal dropper bottles with scales, and push-type pump head bottles with internal threads), the injection blow molding machine can make the plastic evenly fit along the special-shaped parts of the mold during inflation through the coordinated control of "injection preforming + directional inflation". For example, a mixing bottle with a "spiral inner wall" can accurately fit the pattern during inflation through the spiral guide structure in the mold, without the need for subsequent cutting or carving.
Compatible molding of thin and thick walls: It can produce ultra-thin products with a wall thickness of 0.2-0.3mm (such as 10ml oral liquid bottles), and can also stably mold thick-walled products with a wall thickness of 3-5mm (such as chemical anti-corrosion tanks). By adjusting the "injection speed classification" in the injection molding stage (high-speed injection for thin walls to avoid excessive cooling, and low-speed injection for thick walls to reduce bubbles) and the blowing pressure gradient, the problem of thin walls being prone to material shortage and thick walls being prone to shrinkage holes can be solved.
D. Deep adaptation to "clean production"
Food and pharmaceutical grade anti-pollution design: The parts of the equipment that come into contact with raw materials and products (such as hoppers, runners, and molds) adopt a "no dead angle" structure (such as arc transitions instead of right angles), and can be disassembled and cleaned as a whole; some models are equipped with online steam sterilization function (molds and barrels can be fed with 121°C high-temperature steam), meeting the "aseptic production" requirements of the pharmaceutical industry (microbial limit ≤10CFU/piece).
Anti-static and anti-dust pollution: For electronic industry packaging (such as chip moisture-proof bottles), the injection-blow machine can be equipped with an ion wind dust removal device to eliminate static electricity on the surface of the product during the material collection process (static voltage ≤ 50V) to avoid adsorption of dust in the air; at the same time, the equipment shell adopts an anti-static coating to reduce the impact of its own static electricity on the raw materials (such as avoiding uneven feeding of PE raw materials due to static electricity agglomeration).
E. Stability guarantee for long-term operation
Durability design of vulnerable parts: Key components (such as screws and check rings) are made of alloy materials (such as 38CrMoAlA nitriding treatment), with wear resistance increased by more than 50%, and a service life of up to 8000-10000 hours (about 1 year of continuous production); the mold guide column adopts a self-lubricating structure, without the need to frequently add lubricating oil, reducing maintenance downtime.
Continuous production without stopping for material change: Equipped with a dual-hopper switching system, raw material changes can be completed without stopping the machine (such as switching from white PP to transparent PP). Through gradual feeding control (the ratio of new and old materials gradually transitions from 100:0 to 0:100), "mixed color" waste can be avoided during the material change process. It is suitable for small-batch production that requires frequent color changes (such as custom-colored cosmetic bottles).
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High-Performance IBM Injection Blow Molding Machine for Transparent Plastic Packaging Solutions Images
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