China Customized Paper Discharger Manufacturers and Suppliers - Bulk Paper Discharger

Product Overview

ThePaper Discharger is a heavy-duty industrial material handling machine engineered for high-volume offset printing, corrugated packaging converting, and paper mill operations. Designed to integrate directly into pre-press and post-press automated lines, it receives, elevates, clamps, and rotates heavy paper stacks by up to 180 degrees.

By automating stack transfer and pallet exchange, the machine eliminates manual handling injuries, prevents paper edge damage, and feeds lines at a 15-25% faster cycle rate than traditional manual methods. It handles standard and custom pallet configurations with structural rigidity built for continuous multi-shift operations.

LG-2 Paper Unloader
These systems come in diverse configurations, mainly consisting of programmable paper cutters equipped with auxiliary equipment such as elevators, paper joggers and paper unloaders. They can
LG-4 Paper Unloader
These systems are available in diverse configurations, mainly incorporating programmable paper cutters together with auxiliary equipment such as paper elevators, paper joggers and paper unloaders.

Key Features

Proportional Hydraulic Clamping:

Adjustable pressure-relief valves allow operators to precisely regulate clamping force based on paper stock weight and GSM, preventing edge crushing or sheet slippage during 90° or 180° rotation.

Heavy-Duty Box-Beam Chassis:

Fabricated from high-tensile structural steel (Q355B / ASTM A572 Grade 50) with stress-relieved weldments, ensuring zero frame deflection under full rated load.

Dual-Hydraulic Cylinder Drive:

Employs synchronized dual rams for smooth, jitter-free platform elevation and rotation, eliminating mechanical binding.

Integrated Safety Interlocks:

Features perimeter safety light curtains, hydraulic holding valves (preventing platform drop upon hose rupture), and heavy-duty mechanical locking pins at terminal rotation positions.

PLC-Controlled Automation:

Siemens / Schneider PLC integration with a touchscreen HMI, supporting preset automatic cycle sequences, manual jog modes, and fault diagnostics.

Technical Specifications

Parameter	Standard Model (PD-2000)	Heavy-Duty Model (PD-3000)
Max. Load Capacity	2,000 kg (4,400 lbs)	3,000 kg (6,600 lbs)
Max. Paper Size (L x W)	1,450 mm x 1,050 mm	1,650 mm x 1,200 mm
Min. Paper Size (L x W)	600 mm x 450 mm	700 mm x 500 mm
Max. Stacking Height	1,600 mm (including pallet)	1,800 mm (including pallet)
Rotation Angle	0° - 180° (Bi-directional)	0° - 180° (Bi-directional)
Full Rotation Cycle Time	35 - 45 seconds	45 - 55 seconds
Clamping Opening Range	800 mm - 1,750 mm	900 mm - 1,950 mm
Main Motor Power	5.5 kW / 380V / 50Hz (Customizable)	7.5 kW / 380V / 50Hz (Customizable)
Working Hydraulic Pressure	14 - 16 MPa	16 - 18 MPa
Machine Weight	Approx. 3,800 kg	Approx. 5,200 kg

Machine Configuration & Core Components

Component Category	Brand / Specification	Engineering Advantage
PLC Control System	Siemens S7-1200 / Schneider Modicon	Stable processing in high-EMI industrial environments; supports remote diagnostic expansion.
Hydraulic Valves & Pump	Rexroth / Yuken (Vane/Piston pumps)	Low noise emission (less than or equal to 75dB), high volumetric efficiency, minimal internal leakage over extended lifespans.
Hydraulic Cylinders	Custom-engineered precision-honed barrels with chrome-plated rods	Multi-stage polyurethane sealing rings prevent hydraulic oil weeping under high impulse pressures.
Electrical Enclosure	Schneider / Eaton components in IP54 steel cabinet	Organized terminal wiring, numbered ferrules, integrated phase-failure and thermal overload protection.
Bearings & Pivot Pins	SKF / NSK self-aligning spherical roller bearings	High radial load capacity with centralized grease nipples for scheduled preventive maintenance.

Applications

Offset Printing Plants:

Preparing and turning heavy paper stacks before feeding into large-format multi-color sheet-fed printing presses to align grain and eliminate static.

Corrugated Box Manufacturers:

Discharging and flipping heavy corrugated board stacks exiting die-cutters or flexo printers, separating wooden pallets from product stacks without manual intervention.

Paper Mills & Converting Lines:

Intermediate handling of high-tonnage finished paper reams prior to guillotine trimming or wrapping.

Security & Mint Printing Facilities:

Handling sensitive, high-value security paper stocks under strict alignment tolerances and zero-damage parameters.

Customization & OEM Solutions

We engineer non-standard configurations to match exact plant layouts, conveyor heights, and specialized material requirements:

Environment-Specific Builds:

Washdown-resistant corrosion protection or low-temperature hydraulic fluids for refrigerated warehouse environments.

Pit-Mounted vs. Floor-Mounted:

Low-profile platforms for direct floor loading via hand pallet trucks, or pit-flush designs for integration with powered roller/chain conveyor lines.

Specialized Clamping Faces:

Non-marking polyurethane-faced clamping tables or extended side-guides for delicate coated art papers or corrugated flutes.

Voltage & Frequency Adaptation:

Certified electrical layouts for North America (480V/60Hz, UL/CSA panel standards), Europe (CE, 400V/50Hz), and other regional grids.

Quality Control & Manufacturing Standards

The company conducted a competitive advantage analysis to identify its strengths and weaknesses compared to its rivals.

Structural Inspection:

All primary weldments undergo ultrasonic testing (UT) on critical stress joints and shot-blasting to Sa 2.5 standard prior to anti-corrosion epoxy primer application.

Hydraulic Leakage Testing:

Assembled hydraulic power units are pressure-tested at 1.5 times working pressure for 2 hours before integration.

Factory Acceptance Testing (FAT):

Every machine undergoes a mandatory 72-hour continuous no-load and full-load running test in our assembly bay. Test certificates, dimensional inspection reports, and material mill test certificates (MTC) are shipped with the machine documentation.

Compliance Certifications:

CE Machinery Directive (2006/42/EC) compliant; ISO 9001:2015 certified manufacturing facility.

Packaging & Shipping

Corrosion Protection: Exposed unpainted machined surfaces are coated with industrial anti-rust wax and wrapped in VCI (Volatile Corrosion Inhibitor) film for sea freight.
Securing & Crating: Electrical control panels and vulnerable hydraulic elements are shock-cushioned inside fumigation-free plywood export crates. The main chassis is bolted to heavy-duty structural steel skids and secured inside 20ft or 40ft Open-Top / Flat-Rack containers using certified lashing chains.
Documentation Package Included: English technical manuals, hydraulic schematic diagrams, electrical wiring schematics, PLC source code (upon request), and spare parts catalog.

Technical Support & After-Sales Service

01/

Installation & Commissioning: Detailed installation layout drawings provided prior to delivery. On-site commissioning and operator training by certified mechanical and electrical engineers available upon request.

02/

Remote Diagnostics: Optional IoT gateway modules allow our engineering team to connect remotely via secure VPN for real-time PLC troubleshooting and parameter tuning.

03/

Warranty: 12-month standard warranty covering all structural elements, hydraulic pumps, and electrical components from the date of bill of lading (BOL). Extended warranty packages available.

04/

Spare Parts Inventory: Critical replacement components (seals, proximity sensors, solenoid valves, hydraulic filters) stocked locally or dispatched via international express couriers within 48 hours.

FAQ

Q: Can the clamping pressure be adjusted for lightweight or delicate paper stocks to prevent edge creases?

A: Yes. The system utilizes a proportional pressure-reducing valve adjustable via the HMI touchscreen. Operators can store preset clamping pressures for different paper grammages (e.g., light offset paper vs. heavy cardboard).

Q: What is required on-site prior to machine installation?

A: A stable concrete foundation (minimum 150 mm thickness for standard floor-mounted models, or a custom pit foundation if flush-mounting is required), a 3-phase industrial power supply matching your regional specification, and a clean compressed air supply (0.6 - 0.8 MPa) if pneumatic locking pins are specified.

Q: Can this machine be integrated with our existing automated roller conveyors?

A: Yes. We design custom platform heights, integrate photoelectric sensors for position handshaking, and supply potential-free relay contacts to synchronize operation with upstream and downstream conveyor lines.

Q: What routine maintenance is required?

A: Routine maintenance is minimal: weekly visual checks of hydraulic oil levels and hose connections, monthly greasing of spherical bearings via central lube points, and annual hydraulic oil and filter cartridge replacement under standard operating conditions.

Request a Quote

To receive a formal quotation tailored to your production line requirements, please provide the following parameters in your inquiry:
Max. paper size and weight of your stacks.
Pallet dimensions and type (e.g., wooden Euro-pallets, plastic pallets).
Desired rotation angle (90° or 180°).
Factory installation layout constraints (Floor-mounted or Pit-mounted).
Destination port for shipping cost estimation.

Zhejiang Dai's Printing Machine Co., Ltd. is one of the most experienced paper discharger manufacturers and suppliers in China, also supports customized service. Please rest assured to buy bulk durable paper discharger at low price from our factory. For pricelist, contact us now.

heavy load paper discharger system, narrow sheet discharger system, paper leveling discharger machine