China 20-120mm profile height arbitrary angle UPVC welding machine Manufacturer, Supplier, Factory

Lebulang (Shandong Lebulang Precision Machinery Co., Ltd.) is a professional integrated industry and trade supplier specializing in door and window machinery, located in Dezhou, Shandong Province. We focus on the R&D, production and wholesale of high-precision CNC door and window processing equipment for years. Our core product CNC double-head cutting saw for 45° and 90° cutting features stable performance, high cutting accuracy and cost-effectiveness, enjoying great market competitiveness. We support customized processing, bulk order procurement and one-stop machinery solution services, and sincerely hope to establish long-term stable cooperative relations with global door and window manufacturers.

.Struggling with inconsistent angles and material waste? The 550 CNC Internal Swivel Precision Saw solves both. Dual-head inward-tilting design, 45°/90° auto-positioning, ±0.1mm repeatability. Built for aluminum window, door, and curtain wall shops that can't afford a bad cut.

The 450mm CNC Double Head Internal Swing Precision Cutting Saw (45°/90°) is a high-end profile cutting machine designed for aluminum, thermal-break aluminum, and UPVC/PVC window and door production. Equipped with two synchronized Ø450mm TCT carbide blades and CNC-controlled inward-swing saw heads, it performs simultaneous two-end mitre cutting at 45° and 90° with repeat accuracy up to ±0.1mm. The machine features pneumatic auto-feed with adjustable damping, horizontal and vertical pneumatic clamping, and CNC digital positioning for cutting lengths up to 3700mm. The internal swing head design saves floor space while ensuring stable, vibration-free operation. Built for batch production, it delivers burr-free, square ends ready for assembly. CE certification and voltage customization (220V/380V/415V) available for global markets.

This Argon Gas Filling Machine for Insulating Glass Units is a professional, intelligent and portable solution for IGU factory production and on site construction. It injects high purity argon into double and multi layer insulating glass to enhance thermal insulation, sound insulation and anti fog performance. Equipped with high precision control modules and multi dimensional safety protection, it enables four unit simultaneous inflation, separate parameter setting and automatic running. It overcomes flaws of conventional inflation tools including low efficiency, imprecise gas supply, gas waste and complicated operation, suiting both large scale factory manufacturing and flexible mobile working scenarios.

The 400mm Double Head Cutting Saw is a professional profile cutting machine engineered for PVC, UPVC, and vinyl window and door production. Equipped with two synchronized carbide-tipped saw blades (Ø400mm), it performs simultaneous two-end cutting at 45° and 90°, delivering burr-free, melt-free ends with repeat accuracy up to ±0.3mm. The machine features pneumatic auto-feed with adjustable damping, horizontal and vertical pneumatic clamping, and a movable head with digital length positioning (450–3500mm range). Designed for batch processing, it cuts window frames, sashes, mullions, and transoms in a single pass, significantly improving production efficiency. Built with a welded steel frame and precision linear guides, it offers low-vibration, long-service operation. CE certification and voltage customization (220V/380V/415V) are available for global markets.

Our Dual Cut 4+2 Axis End Miller Thermal Break Aluminium Production Line is a heavy-duty, high-precision end milling machine specially developed for thermal break aluminum profiles, widely used in aluminum door, window, and curtain wall manufacturing. Combining 4 linear axes + 2 rotary axes with dual-spindle dual-cutting design, this machine achieves one-pass complete machining of mullion end faces, tenons, grooves, and step surfaces — ideal for mass production and high-precision requirements.Lebulang brand is famous china Manufacture.