Second Hand Cardboard Production Line

Product Introduction

Second-hand cardboard production line refers to a complete combination of cardboard production equipment that is re-introduced to the market after early use, and is mainly used to produce corrugated cardboard, cartons and other paper packaging materials.

Core composition and functions

A complete set of second-hand cardboard production lines usually include the following key equipment modules, and each module works together to achieve the full process of production from base paper to finished products:

Base paper holder and automatic paper connection system

Function: Carrying the base paper roll to achieve continuous paper feeding

Features:

Equipped with hydraulic or pneumatic expansion shaft fixed paper roll

High-end models include automatic paper coupling device (reduces downtime)

Single-sided machine (single corrugated forming machine)

Core process: Press corrugated paper into wavy corrugated shape through high temperature and high pressure

Liner type configuration: Common A/B/C/E/F, second-hand equipment needs to confirm the wear of the lining roller

Typical parameters:

Working width: 1.6m/2.2m/2.5m

Maximum speed: 80-150 meters/min (depending on equipment age

Double-sided machine (composite bonding machine)

Function: Combine single-sided corrugated paper with face paper to form double-corrugated/tri-corrugated structure

Key component inspection:

Hot plate flatness (affects thermal conductivity)

Wearing condition of pasting machine scraper

Longitudinal wire press

Function: Precisely cut the cardboard width and press the crease line

Second-hand advantages: Mechanical crimping wheels are usually more durable than new CNC systems

Cross-cutting machine (computer cross-cutting)

Technology Type:

Mechanical (common economical second-hand equipment)

Servo CNC (high precision, need to check the aging degree of control system)

Accuracy standard: The length error of second-hand equipment should be ≤±1.5mm

Stacking output system

Configuration options:

Simple belt conveying stacking (low-fitting)

Automatic counting packaging line (mid-to-high-end models)

Highlight advantages

Technology maturity

Equipment that has been verified by actual production is more stable

Common fault solutions are mature (low maintenance costs)

Advantages of rapid production

No waiting period for customization of new machines (usually delivery within 7 days after on-site inspection)

Already references to process parameters (reduce debugging difficulty)

FAQ

What are the main sources of second-hand cardboard production lines?

Answer: Mainly from:

Equipment for packaging factory production capacity upgrade and elimination

Disposal of assets of bankrupt enterprises

Import of overseas equipment (such as second-hand equipment from Japan and Germany)

Old machine resold by equipment rental companies

How to determine whether the service life of the device is true?

Answer: It can be verified by:

Check the factory date on the equipment nameplate

Check the original maintenance records (focus on the spindle and motor replacement records)

Observe the version age of the control system (such as PLC model)

Measure the wear of the corrugated roller (approximate wear of 0.05mm per 10 million meters produced)

Which core components must be replaced?

Answer: It is recommended to replace it first:

Corrugated roller (medium-high quantity <0.08mm)

Paste machine scraper assembly

Hot plate steam valve set

Drive system bearings (especially drying parts)

Can second-hand equipment produce high-end micro corrugated (such as F/N corrugated)?

Answer: Need to meet:

The corrugated roller has intact teeth (no collapse deformation)

Minimum feed weight ≥90g (limited to old equipment)

It is recommended to test the production and verification first (usually additional pressurized rollers are required)