Accurate and IBM Injection Blow Molding Machine for Precision Product Manufacturing with Mold Temperature Zoning Control

A. Ultra-high molding accuracy to meet the requirements of precision products The "injection-blowing" integrated molding (no secondary processing) of the injection blow molding machine itself is more accurate than the "injection + blow molding" split production, and modern equipment further improves stability through detailed design:
• Multi-stage pressure/speed closed-loop control: The injection molding stage is divided into 3-5 stages of "filling, holding pressure, and shrinkage compensation". The pressure (0-150MPa) and screw speed (0-200rpm) of each stage are fed back in real time through the "pressure sensor + encoder". When the deviation exceeds ±1%, it is automatically adjusted (for example, the pressure suddenly increases during the filling stage, and the system immediately reduces the screw speed to avoid flash on the product). This control is crucial for products with high requirements for wall thickness uniformity (such as 1ml syringe barrels, wall thickness deviation must be ≤0.03mm). • Mold temperature zoning control: The blow molding mold is divided into 3-4 temperature control zones of "bottom, side wall, and bottle mouth", and the temperature of each zone is independently controlled (accuracy ±0.5℃). For example, the mouth of a medicinal bottle needs to be strictly sealed, and the temperature of the mouth area is set 2-3°C higher than the side wall to ensure that the thread is fully formed (no missing teeth or deformation); and in order to avoid dents, the temperature of the bottom of the bottle is slightly lower by 1-2°C to accelerate cooling and shaping. • Online dimension detection linkage: Some high-end equipment is equipped with a "visual inspection system" to automatically sample 1 piece for every 100 products produced (to detect the diameter of the bottle mouth, the verticality of the bottle body, etc.). If the size is detected to be out of tolerance (such as the deviation of the bottle mouth diameter > 0.05mm), the system directly feeds back to the host and automatically fine-tunes the injection molding holding time or the blow molding pressure (adjustment range 0.1-0.5%), without manual shutdown adjustment, and the scrap rate can be controlled below 0.3%.

B. Low energy consumption design, adapted to environmentally friendly production requirements The energy consumption of injection blow molding machines mainly comes from "injection molding motor, hydraulic system, heating system". Modern equipment reduces unit energy consumption through technological upgrades:
• Servo motors replace traditional asynchronous motors: The power source in the injection molding stage is changed from "asynchronous motor + quantitative pump" to "servo motor + variable pump" - traditional motors maintain high-speed operation (fixed energy consumption) regardless of load size, while servo motors automatically adjust according to actual needs (such as high load and high speed during mold filling, low load and low speed during pressure holding), and the energy consumption of the injection molding process is reduced by 30%-40% (taking the production of 500ml beverage bottles as an example, a single device saves about 80-100 degrees of electricity per day). • Waste heat recovery and insulation design: The surface heat dissipation during barrel heating (accounting for about 20% of the heating energy consumption) is utilized through "insulation cotton + waste heat recovery device" - the insulation cotton is made of aluminum silicate (thermal conductivity ≤ 0.03W/(m・K)), and the surface temperature is reduced from the traditional 80-100℃ to 40-50℃; at the same time, the recovered waste heat is used to preheat the raw materials in the hopper (heating the raw material temperature from room temperature 25℃ to 40-50℃), reducing the energy consumption demand for barrel heating, and the overall heating system saves about 15% energy. • No-load energy consumption optimization: When the equipment is shut down to wait for raw materials or change molds, it automatically enters "sleep mode" - the heating system maintains the lowest insulation temperature (10-15℃ lower than normal production), the motor and hydraulic pump stop running (only the control system is powered on), and the no-load power consumption is reduced from the traditional 3-5kW to 0.5-1kW (calculated based on an average daily shutdown of 2 hours, saving 5-8 degrees of electricity per day).

C. Adapt to special materials and expand application scenarios In addition to conventional PET, PE, PP and other materials, the injection blow molding machine can process special materials that are sensitive to molding conditions through structural adjustment to meet the needs of high-end fields:
• Processing of high-temperature materials (such as PPSU, PEI): For PPSU commonly used in the medical field (molding temperature 300-340℃), the equipment barrel and screw adopt "bimetallic alloy" (surface sprayed with WC-Co coating, high temperature wear resistance), and the heating system is upgraded to "electromagnetic heating" (heating speed is 50% faster than traditional resistance heating, temperature stability ±1℃), to avoid material retention and degradation at high temperature (degradation will cause product discoloration and mechanical properties to decrease). • Processing of transparent materials (such as PC, PMMA): Transparent products have extremely high requirements for “impurities and bubbles”. The injection blow molding machine is equipped with a “multi-stage filtration system” (from the hopper to the cavity, passing through 100 mesh, 200 mesh, and 300 mesh filters in turn) to filter out tiny impurities in the raw materials (impurities ≥0.05mm can be completely filtered); at the same time, the inner surface of the barrel is “mirror polished” (Ra≤0.02μm) to reduce black spots caused by raw material retention and ensure the transmittance of the product (such as the transmittance of PC bottles can reach more than 90%, without obvious scratches or haze). • Processing of biodegradable materials (such as PBAT/PLA composites): This type of material is easily hydrolyzed (moisture content > 0.05%), and the equipment hopper is equipped with a "vacuum dehumidification dryer" (dew point temperature ≤ -40°C). At the same time, the screw speed is reduced (50-80rpm, traditionally 100-150rpm) and the molding cycle is extended by 5-10 seconds to reduce degradation caused by shear overheating of the material and ensure the mechanical properties of the product (such as tensile strength ≥ 20MPa, in line with packaging requirements).

Zhangjiagang Ziqiang Machinery Co., Ltd. is mainly engaged in the research and development, production, sales and trade of automatic one-step "injection-blowing" blow molding machine and supporting "injection-blowing" mold manufacturer. The company is located in Zhangjiagang City, a national health and civilized city. It enjoys an advantageous geographical location and convenient transportation.

Zhangjiagang Ziqiang Machinery Co., Ltd. has an excellent R&D team. The company brings together many engineering and technical personnel engaged in “injection-blowing” machinery and “injection-blowing” molds. With rich theoretical and practical experience, we can provide customers with detailed and thoughtful "pre-sale", "sale" and "after-sale" services.

The company's product applications cover pharmaceutical packaging, food packaging, health care packaging, cosmetic packaging, and other plastic packaging. It can produce 1ml-1000ml plastic products such as HDPE, LDPE, PP, PS (lactic acid bacteria), high transparent PS, ABS, environmental corn material, EVA, PCTG and so on.

Zhangjiagang Ziqiang Machinery Co., Ltd. adheres to the enterprise development tenet of “self-reliance, integrity, pragmatism, innovation and responsibility”, and builds a one-stop “turnkey” project to produce high-end “injection-blowing” products with satisfactory user quality and first-class quality.