Wenzhou Hengtong / Hengtong Machinery packaging equipment

Industrial converting and packaging machinery from Wenzhou Hengtong: automatic window patchers ZKT, express envelope manufacturing lines ZF, and bag forming equipment for global plants.

Wenzhou Hengtong ZKT-500 automatic window patching machines

Wenzhou Hengtong manufactures automatic window patching machines, express envelope lines, and paper converting equipment for industrial packaging operations. The ZKT-500 and ZKT-500B lines deliver continuous film application for pharmaceutical cartons and apparel gift packaging.

Paperboard processing range 250 to 1000 gsm and corrugated flute thickness up to 3 mm
Operating output speeds from 4000 to 10000 pieces per hour with precise registration
Compatible with roll films including OPP, PVC, PET, and PE in caliper 0.05 to 0.25 mm
Technical selection of vacuum transport belts, adhesive wheels, and rotary cut knives

Wenzhou Hengtong ZF-323 automatic express envelope making machines

The ZKT series provides precision film patching for tissue, pharmaceutical, and food cartons, while the ZF series handles automated courier envelope manufacturing. The ZF-323 envelope machine integrates continuous paper feeding, gluing discs, and silicon release tape application.

Production of mail and courier express envelopes ranging from 100x150 to 300x350 mm
Non-stop suction feeding mechanism handling heavy kraft paper sheets 200 to 300 gsm
Integrated dispensing unit for pressure-sensitive adhesive tape and tear strip string
Technical supply of feed suction cups, folding plates, glue discs, and optical sensors

Hengtong ZKT-890A/1200A horizontal knife servo window patchers

The ZKT-890A and ZKT-1200A window patchers from Hengtong Machinery feature horizontal servo cutting knives for heavy folding cartons. Electronic servo synchronization ensures stable film cutoff length and registration accuracy during high-speed packaging runs.

Paper sheet processing width up to 1200 mm with extended feeding stroke to 890 mm
Precision servo drive motor coordination between vacuum belt and knife cylinder
Touch panel operator screen for setting cutoff length without manual gear changes
Replacement support for drive timing belts, servo controllers, and rotary bearings

Hengtong STD-930 and STDH-550 paper bag forming machines

Hengtong Machinery engineered the STD-930 bag forming unit and STDH-550 bottom gluing system for retail and industrial paper bags. The rigid structural frame dampens mechanical vibration, maintaining consistent tube folding and glue application across volume operations.

Forming paper bags and handle shopping bags from craft paper and laminated stock
Automatic adhesive distribution along bottom flaps for reinforced structural seam
Rapid mechanical guide rail adjustment when switching between package formats
Components include glue fountain rollers, dispensing nozzles, and feed rollers

Hengtong ZKT-1080 spot gluers and JS roller gluing machines

The gluing equipment portfolio from Hengtong Machinery encompasses ZKT-1080 spot gluing stations and JS roller gluers. The calibrated roller mechanics apply uniform cold adhesive coats onto box joining flaps without adhesive splashing or edge bleed.

Fine micrometer adjustment controlling clearance between metering roll and doctor blade
Uniform spreading of water-based cold PVA adhesives on paperboard folding flaps
Removable stainless glue reservoir designed for fast washdown during batch changeovers
Spares include doctor blades, rubber-coated rollers, bearing assemblies, and gears

Hengtong MCY-700 die cutting and punching presses

The MCY-700 punching and die cutting presses from Hengtong Machinery handle corner cutting, window piercing, and profile punching. The heavy-duty crank mechanism provides steady stamping pressure, producing clean cut edges without board burrs or fiber tearing.

Precision die cutting for packaging handle cutouts, corner notches, and window slots
Adjustable stroke stroke depth for thick greyboard and laminated converting blanks
Safety optical light curtains protecting operators around the working die opening
Spares include tool steel punches, cutting dies, bronze guide bushes, and gibs

Kinematic features and operating speeds of ZKT window patching machines

Automatic window patching machines in the ZKT series from Wenzhou Hengtong (Hengtong Machinery) deliver precision film application across folding paperboard and micro-flute containers.

The timed bottom suction feeder transfers individual die-cut blanks onto continuous vacuum transport belts without sheet scuffing. Optical photoelectric eyes track the leading carton edge to synchronize the rotary glue stencil wheel and film feed rollers.

Operators adjust film cutoff length through a digital touchscreen interface controlling high-torque servo motors. The stable machine foundation absorbs cyclic dynamic loads, ensuring high registration accuracy at speeds reaching 10000 sheets per hour.

Continuous suction feeding technology in ZF-323 envelope making lines

The ZF-323 envelope manufacturing line from Wenzhou Hengtong is built for high-volume conversion of courier mailers and express postal bags. The bottom suction feeding assembly replenishes kraft paper sheets without stopping the line, maintaining uninterrupted production flow.

Rotating disc units distribute liquid adhesive evenly along side and bottom flaps before mechanical folding plates press the seams firmly. An automatic tape applicator indexes pressure-sensitive silicone release tape and tear strips onto the top closure flap.

Machine alignment guides keep paper blanks parallel, preventing skewed folding during continuous long-run packaging operations.

Advantages of the horizontal servo knife in high-speed ZKT-890A systems

High-speed window patchers in the ZKT-890A and ZKT-1200A series utilize horizontal rotary servo knives designed for large folding cartons. Decoupling the cutoff cylinder from mechanical drive shafts gives operators independent digital control over film feed velocity and cutting timing.

The knife assembly incorporates hardened alloy cutting blades that deliver perpendicular square film edges across PET, PVC, and OPP roll stock. Micro-adjusting side guide rails accommodate varied container blanks up to 1200 mm in width.

Vacuum assist cylinders hold cut film patches securely until transfer onto glued carton window apertures.

Tube forming and bottom folding in STD series paper bag machines

Converting systems in the STD-930 and STDH-550 lines manufacture durable retail shopping bags and industrial paper sacks. Heavy kraft paper reels pass through longitudinal folding formers that shape continuous paper tubes with glued overlap seams.

Flying knife mechanisms sever individual tube lengths according to preset bag specifications. The bottom folding unit opens the lower tube end, applies cold dispersion adhesive via rotating wheels, and folds the base into a reinforced flat bottom.

Rigid structural iron frames prevent mechanical deflection, ensuring repeatable bag dimensions during full-speed factory operation.

Clearance adjustment mechanics of gluing rollers on ZKT-1080 gluers

Precision adhesive application stations on ZKT-1080 spot gluers and JS roller machines ensure controlled glue spread onto packaging folding flaps. Dual steel metering rollers paired with polyurethane doctor blades maintain uniform film thickness across the full working width.

Calibrated micrometer adjustment dials allow technicians to fine-tune roller nip clearance to within fifty microns. Removable stainless steel adhesive fountains facilitate quick washdown when changing glue formulations between production runs.

Variable frequency drive motors synchronize roller surface speed with carton feeding lines to eliminate glue sling.

Die cutting and punching of packaging blanks on MCY series presses

Punching and die cutting presses in the MCY-700 series perform corner notching, handle slot piercing, and contour trimming on paper packaging blanks. A rigid eccentric crank mechanism drives the upper tool slide, generating uniform stamping force across dense greyboard and laminated sheet materials.

Precision guide pillars maintain upper and lower die alignment, preventing burred edges and sheet deformation. Optical safety light curtains monitor the operator working perimeter to ensure immediate stopping upon beam interruption.

Quick-lock clamping fixtures enable rapid die tooling changeovers between production shifts.

Wenzhou Hengtong / Hengtong Machinery and model names are trademarks of their respective owners and are used only to identify the equipment for which we source parts. SpareX is not an official dealer, distributor or representative of Wenzhou Hengtong / Hengtong Machinery and is not affiliated with the trademark owner. Origin, documents and warranty are stated for each item in the quotation.