When it comes to PET processing, your machine’s performance directly affects product quality, production efficiency, and your bottom line. LiSong’s PET dedicated machine brings three game-changing innovations to the table—direct-pressure clamping, an independent dual-screw injection system, and full-electric precision control. These aren’t just small upgrades; they fundamentally reshape what’s possible, giving PET manufacturers a truly competitive edge.

Direct-Pressure Clamping: The Foundation of Stability and Precision

      Let’s start with the clamping unit. Instead of using the traditional toggle-type design, we went with a direct-pressure system driven by a ball screw for opening and closing. This pushes the platen directly, spreading clamping force evenly across the entire mold parting surface. The result? Much better stability and precision.

      Unlike mechanical straight-lock systems that “close then lock,” our direct-pressure design actually “presses” the mold shut. It’s simpler, has fewer parts, and that means lower failure rates and less maintenance overhead.

      Since it’s fully electric, the clamping response is lightning-fast. And the low-pressure mold protection is incredibly sensitive—it only uses about 1/30 of the full clamping force, which is a huge plus for protecting delicate PET molds. Plus, the system is lubrication-free, so there’s zero risk of oil contamination—ideal for food-grade applications.

      Another big advantage: longer stroke and larger mold space. That makes it especially good for deep-cavity preform production, opening up more application possibilities. The three-cylinder ejector is strong and stable, ensuring smooth, reliable demolding every time.

Four key benefits here:

      High precision with low deformation means less flash, better concentricity, and higher yield.

      Simple structure keeps maintenance costs low.

      Handles deep-cavity products with ease.

      No toggle wear means long-term accuracy and extended machine life.

Independent Dual-Screw Injection: Two Engines Working Smarter

      Now for the injection system. We separated the plasticizing screw and the injection screw so they work independently—but in perfect sync. While the mold is cooling, the system is already prepping the next shot. That overlap slashes cycle times and really boosts throughput.

      This dual-screw setup gives you what we call the “three constants”: constant temperature, constant plasticizing, and constant melt density. The melt temperature stays extremely uniform, molecular distribution is consistent, and closed-loop control ensures that every single shot—whether it’s a multi-cavity mold or not—comes out identical.

      Because the melt temperature is lower and the residence time is shorter, acetaldehyde (AA) generation is significantly reduced, which directly improves product quality. The mixing is excellent, plasticizing happens at lower temps, and the melt comes out smooth—no crystals, no bubbles, just homogenous material.

      And here’s a bonus: it handles regrind really well. So you can recycle sprue and reject parts easily, cutting material costs and making your process more sustainable.

Four key benefits:

      Plasticizing and injection are decoupled, so you’re always ready for the next cycle.

      Low-temperature plasticizing minimizes AA formation.

      Low shear heat means fewer defects and better uniformity.

      Wide material compatibility, including regrind.

Full-Electric Precision Control: The Smart, Energy-Saving Brain

      The control system is the brain of this machine. Everything—clamping, injection, melt screw rotation—is driven by servo motors with ultra-precise closed-loop control over position, speed, and pressure. The result? Unmatched repeatability, shot after shot.

      Energy-wise, it’s a big win. Compared to conventional hydraulic machines, we’re looking at 40–60% less energy consumption. Add infrared heating technology, and your utility bills drop even more. No hydraulic oil means a cleaner production environment—critical for food and medical applications. And it runs much quieter, too, making the workspace more comfortable for your team.

Four key benefits:

      Excellent repeatability for consistent part quality.

      Significant energy savings reduce operating costs.

      Clean and contamination-free—ideal for high-end applications.

      Low noise level improves the working environment.

LiSong PET Machine: The Smart Choice for Manufacturers

      To put it simply: the direct-pressure clamp gives you a rock-solid foundation, the dual-screw injection system drives superior quality and speed, and the full-electric controls make everything smart and efficient. Together, these three innovations work in harmony to deliver performance that’s more than the sum of its parts.

      With LiSong, you get reliable equipment, faster production, greener operations, and premium product quality. It’s not just about buying a machine—it’s about long-term value, growth, and staying ahead in the high-end PET market.