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POPULAR QUESTIONS
A machine that melts plastic resin and injects it into a mold to form solid parts, commonly used in manufacturing.
Plastic pellets are heated, melted, and injected into a mold, where they cool and harden into shape, producing precision parts.
Hydraulic, electric, and hybrid machines, each offering unique efficiency and power characteristics.
Hydraulic machines use oil pressure, whereas electric machines use servo motors for higher precision and energy efficiency.
The pressure needed to keep the mold tightly shut during injection, measured in tons, crucial for avoiding defects.
Common options include ABS, polypropylene, polyethylene, polycarbonate, and nylon, each offering unique properties.
Uneven cooling or residual stress in the material can cause distortion, affecting part quality.
Increasing injection pressure, temperature, or material flow rate can help fill the mold completely.
Sink marks, warping, flash, short shots, burn marks, and jetting, all of which impact final product quality.
Excess plastic escapes the mold due to misalignment or excessive pressure, requiring precise mold design.
Automotive, medical, consumer goods, electronics, and packaging industries rely on it for mass production.
Prices vary from $10,000 to over $500,000 based on size and features, reflecting investment needs.
High-volume production with consistent quality and cost efficiency, making it a preferred choice.
The high initial investment for molds and equipment can be a barrier for small-scale manufacturers.
Steel molds can last millions of cycles, whereas aluminum molds have a shorter lifespan, affecting production longevity.
Both are servo driven and span 90 to 650 tons. The S8 is the energy efficient general purpose platform for everyday production molding. The S9 is the higher end precision platform for applications that demand tighter tolerances and faster, more repeatable performance. The right choice depends on your part tolerances, cycle targets, and budget rather than tonnage alone.
Servo systems power the hydraulic pump only on demand instead of running continuously, which can reduce electricity use significantly compared with a standard fixed pump hydraulic machine. Actual savings depend on cycle time, shot size, idle ratio, and how the machine is run. Energy use is best compared in kilowatt hours per kilogram of processed plastic.
LOG offers both the S8 and S9 Series from 90 tons up to 650 tons, so most small to large part applications can be matched to a model without overspending on clamp force you do not need.
A common starting method multiplies the projected part and runner area in square inches by a material specific factor, typically 2 to 5 tons per square inch, then adds a safety margin. Too little tonnage causes flash. Too much wastes energy and stresses the mold. Share your part footprint and resin and our team will help confirm the model.
Too little force lets the mold open slightly during injection, producing flash and dimensional problems. Too much force raises energy cost, accelerates tooling wear, and can damage delicate molds. Matching tonnage to the projected area and material is the goal.
Fit is determined by tie bar spacing, minimum and maximum mold height, platen size, and required daylight. Send your mold dimensions and we will confirm which S8 or S9 model accepts it.
The S8 and S9 process common thermoplastics including polypropylene, polyethylene, ABS, polystyrene, nylon, polycarbonate, and PET, along with filled and reinforced grades. Hygroscopic resins such as nylon, PET, and polycarbonate should be dried before molding.
Hygroscopic materials such as nylon, PET, PBT, and polycarbonate absorb moisture from the air and must be dried to the supplier's specification, or you risk splay, brittleness, and surface defects. Non hygroscopic resins such as polypropylene and polyethylene usually do not require drying.
Routine care includes checking and changing hydraulic oil and filters, inspecting the screw and barrel for wear, lubricating the toggle or tie bar areas, verifying clamp and ejector function, and keeping cooling lines clear. A consistent preventive maintenance schedule protects cycle time and part quality.
Regrind is reprocessed in house scrap such as sprues, runners, and rejected parts that is granulated and blended back with virgin resin at a controlled ratio. LOG machines run regrind blends well, and pairing a LOG molding machine with a ZERMA or Virtus granulator lets you reclaim scrap on site.
With proper maintenance, an industrial injection molding machine commonly delivers many years of productive service. Lifespan depends on duty cycle, materials processed, and maintenance discipline. Servo systems also tend to run cooler and quieter, which can support longevity.
Yes. LOG supports the S8 and S9 with spare parts, certified field service engineers, operator and maintenance training, and processing assistance including mold trials and optimization for difficult resins.
