The LQ-450×2 is a double-channel heat-sealing and heat-cutting bag making machine built for mid-volume production of T-shirt bags, flat bags, and printed shopping bags. Two independent production channels run simultaneously from a single compact frame — at 200 pcs/min per channel, a single 8-hour shift produces up to 192,000 finished bags.
The machine is microcomputer-controlled with photoelectric eye tracking for accurate cut registration on pre-printed film. An automatic shutdown triggers if registration marks are lost, preventing wasted material. Built-in automatic counting with preset stop quantity keeps batch sizes precise without operator monitoring.
Beyond the core seal-and-cut function, the LQ-450×2 includes integrated automatic drilling (pendant holes and exhaust holes) and automatic adhesive pasting as standard features — capabilities that typically require separate equipment on competing machines. T-shirt bag handle cutouts are added inline via the optional X626 punching machine. The stepper motor drive is standard; a servo motor upgrade is available for applications requiring tighter length control.
At 4.6 kW total power and 900 kg, this is a compact, energy-efficient dual-channel machine suited to factories where floor space and operating costs are both constraints.
Core engineering decisions that determine output consistency, precision and long-term running cost.
Two independent production channels run in parallel, delivering up to 400 bags per minute combined — double the throughput of a single-channel machine on a 900 kg, 2500 mm frame.
Step-size photoelectric tracking detects print registration marks and adjusts cut position in real time, ensuring consistent design alignment on every printed bag.
If the photoelectric sensor loses the registration mark, the machine stops automatically — eliminating wasted film and mis-cut bags without operator intervention.
Pendant holes and exhaust holes are punched in-line during production using the integrated drilling unit, removing the need for a separate downstream drilling station.
Self-adhesive strip application is integrated into the production pass, enabling resealable flat bags without additional equipment.
Automatic counter with configurable stop quantity halts the machine when a target batch is reached, enabling consistent pack sizes and reducing manual oversight.
Standard stepper motor drive can be upgraded to servo motor control for tighter bag length repeatability — suited to higher-precision or printed-film applications.
Automatic energy-saving, overload, over-voltage, and over-current protection circuits are built in, reducing unplanned downtime and protecting electrical components.
Confirmed output types for this machine configuration. Actual results depend on film specification and tooling selection.
Not sure if this machine covers your specific product? Send us your sample or drawing
All specifications are under standard operating conditions and may vary depending on film material, bag size and configuration.
| Model Number | LQ-450×2 |
|---|---|
| Total Power | 4.6 kW |
| Machine Weight | 900 kg |
| Cut Type | Hot Cut |
| Lines / Channels | 2 |
| Max Bag Width | 400 mm |
| Speed | 120–200 pcs/min × 2 |
| Film Thickness | 0.010–0.050 mm（10–50 µm） |
| Materials | HDPE, LDPE, LLDPE |
Specifications subject to change without notice. Contact LayerQuestar for the latest confirmed datasheet for this model.
Common questions about the LQ-450×2. For configuration-specific questions, contact our engineering team directly.
The LQ-450×2 runs two channels simultaneously at 120–200 pcs/min each, for a combined maximum of 400 bags per minute. At 80% operational efficiency over an 8-hour shift, this produces approximately 192,000 finished bags.
The machine produces T-shirt (vest carrier) bags when paired with the optional X626 punching machine, and flat bottom-seal bags in standard configuration. The built-in drilling unit also enables bags with pendant holes or exhaust holes, and the adhesive pasting unit enables resealable flat bags.
Handle cutouts for T-shirt bags require the optional X626 punching machine, which operates inline immediately after the bag making unit. The LQ-450×2 itself handles sealing, cutting, drilling, and adhesive pasting; the X626 adds the vest-style handle opening.
The machine processes film from 0.010 mm to 0.050 mm (10–50 microns), covering ultra-thin HDPE grocery bags through medium-duty LDPE and LLDPE shopping bags.
The standard stepper motor drive is adequate for plain film and moderate-speed production. The optional servo motor upgrade provides closed-loop position control, holding bag length deviation within ±1 mm — recommended when running pre-printed film at higher speeds where registration accuracy is critical.
The photoelectric eye sensor continuously monitors print registration marks on the film. If the mark is not detected within the expected position — due to film splice, roll end, or print defect — the machine stops automatically. This prevents a run of mis-cut or mis-registered bags and reduces film waste.
Total installed power is 4.6 kW, with a 1.5 kW main motor. For a dual-channel machine producing up to 400 bags per minute, this represents low energy consumption per unit output — an advantage in regions with high electricity costs.
Yes. Switching between modes requires disengaging the X626 punching machine (for flat bag mode) or reconnecting it inline (for T-shirt bag mode). The core machine configuration — sealing, cutting, tracking, and counting — remains unchanged between modes.
Send us your bag size, output target and film spec — LayerQuestar will respond within 4 business hours.