128Ton injection molding machine

For medium and large plastic product factories and scaled building material production lines, mass production with heat-sensitive UPVC powder faces common industrial challenges: inconsistent product quality, carbonization at high production speed, uneven internal stress of large workpieces, and rapid equipment performance degradation after long-time continuous running. A standard conventional injection machine cannot adapt to the special plasticizing principle of UPVC powder, failing to sustain mass output for multi-cavity molds and large rigid plastic parts. Built on mature plastic machinery R&D system, this 128-ton model belongs to the customized Special Injection Molding Machine Series. It is tailor-made for mass production scenarios of UPVC pipe fittings, construction hardware plastic parts and large plastic fastener components, featuring stable mass production, low defect rate and long service life.

 

As the standardized Special Injection Molding Machine For UPVC Powder Materials, the whole machine has undergone systematic structural upgrades to suit the properties of UPVC powder, including easy thermal decomposition, strong corrosiveness and poor fluidity. Different from the lightweight configuration of small tonnage models, the 128-ton machine is equipped with an enhanced heavy-duty plasticizing system. The customized integrated anti-corrosion screw and barrel resist corrosive media released when UPVC is heated, preventing screw scratch, uneven plasticization and black marks on finished products caused by long-term continuous production. With zoned independent constant temperature control system, it accurately controls temperature thresholds in the whole process of pre-plasticizing, melting and injection. It effectively solves common defects in mass production such as color difference, short shot, internal air holes and brittle cracking of molded parts, and perfectly supports mass manufacturing of various medium & large rigid UPVC products with multi-cavity molds.

In terms of power and molding efficiency, this machine adopts mature energy-saving servo structure, acting as a high-performance Servo Energy‑saving Injection Molding Machine. Considering the long holding pressure period and stable cycle time in UPVC molding, the servo power system intelligently allocates power output for mold opening/closing, pre-plasticizing, injection and holding pressure. It eliminates the high constant power consumption issue of traditional hydraulic machines. Under full-load non-stop production conditions, it can effectively cut comprehensive power cost of factories, while maintaining stable hydraulic pressure to avoid dimensional deviation caused by pressure fluctuation. It balances high productivity and low energy consumption for long-term profitable large-scale manufacturing.

 

To meet the demand of modern assembly line production, the machine is fully compatible with standardized Plastic Auxiliary Equipment and various auxiliary machine packages. Factories can optionally install an Autoloader Machine for automatic powder feeding, to avoid dust pollution and uneven feeding from manual operation. An independent Drying Machine can be equipped to precisely control powder moisture, eliminating molding defects originating from wet raw materials. Combined with customized Auxiliary machine sets, it realizes integrated automatic production including feeding, drying, temperature control and molding, greatly reducing manual operation cost and improving the standardization and efficiency of the whole production line.

 

The machine is built with industrial-grade stable mold clamping structure, optimized based on the precision molding concept of High‑precision Two‑plate Injection Molding Machines. It delivers stronger clamping rigidity and higher mold closing parallelism. When working with medium-large size Plastic Mold and multi-cavity precision molds, it achieves smooth mold closing without offset, and evenly distributed clamping force. It effectively solves common problems of large UPVC parts, such as flash, uneven thickness and deformation during demolding. The high-precision closed-loop pressure feedback system supports multi-stage injection speed and pressure adjustment, adapting to UPVC powder materials of different formulas and specifications, with stable molding accuracy and excellent consistency of finished goods.

 

Unlike small machines only for small part trial runs, this 128-ton dedicated Injection Molding Machine focuses on industrial mass production. It is widely applied for UPVC large pipe fittings, engineering wall anchors, construction plastic components, large electrical insulating plastic parts and other mainstream products. With robust structure, low failure rate and easy maintenance, the machine supports automatic production line retrofitting. It serves as the core main plastic machinery for small and medium manufacturers to upgrade scaled UPVC production lines, improve product quality and reduce production losses.