Roll-fed Paper Bag Machine Selection Guide: A Scientific Decision-Making Path for Equipment Selection in Paper Bag Processing Plants
Introduction
When paper‑bag processing factories select roll‑fed paper bag machines, common mismatches often occur, including improper machine handle structure for actual orders, incompatibility with paper grammage, and bag dimensions exceeding the machine’s processing range. This article adopts a standardized decision‑making workflow to help processors select suitable models according to bag‑making processes, order requirements and workshop conditions.
Step 1: Quantify Basic Production Requirements
At the early stage of model selection, convert business indicators into input parameters for the roll‑fed paper bag machine.
Product process statistics: Sort out the types of paper bags to be produced, record the length, width and bottom dimension of bags as well as paper grammage. Classify round‑rope handle bags, flat‑rope handle bags, D‑cut handle bags, handle‑free square‑bottom bags and V‑bottom (pointed‑bottom) bags. Confirm whether an in‑line printing process is required.Operating parameter statistics: Count the commonly‑used cutting length, bag width and bottom width from orders, and sort out order batch volumes and order‑change frequency.Capacity Calculation
Theoretical hourly output = number of bags produced per minute × 60. Calculate the required machine speed range based on the total monthly order volume.Workshop condition statistics: Record workshop length, width, height, power supply and air source requirements, and reserve sufficient space for equipment maintenance and disassembly. Confirm raw roll specifications including maximum roll diameter and core inner diameter, and evaluate whether a printing unit needs to be equipped.
Step 2: Technical Classification by Machine Structure
‑ RKHF‑T Series Automatic Round‑rope Paper Bag Machine: Equipped with twisted round‑rope handle forming mechanism, suitable for shopping bags with round rope handles, available in 220T / 330T specifications; compatible with paper of 60‑160g/m², designed for orders requiring round‑rope handles.
‑ RKHF‑F Series Automatic Flat‑rope Paper Bag Machine: Fitted with flat‑rope handle processing unit for producing shopping bags with flat rope handles, available in 330F / 460F / 550F models; suitable for paper of 80‑160g/m², ideal for gift bags and supermarket shopping bags.‑ RKFD‑P Series D‑cut Paper Bag Machine: Produces D‑cut handle bags without rope handles; models include 220P / 330P / 460P / 550P. Featuring compact structure, this machine is widely used for simple food carry bags.‑ RKFD Series Roll‑fed Square‑bottom Paper Bag Machine: Handle‑free square‑bottom bag machine with single‑roll and double‑roll versions, capable of manufacturing bread bags and food square‑bottom packaging bags. Some models support optional 1‑4 color in‑line printing unit.‑ RKJD Series Roll‑fed Pointed‑bottom (V‑bottom) Paper Bag Machine: Specialized for pointed‑bottom bags with a production speed of 50‑600 pcs/min. Adapted to thin paper materials, mainly for bakery pointed‑bottom packaging bags, and an optional in‑line printing module is available.‑ In‑line Printing Integrated Paper‑bag Machine: Built‑in printing unit based on square‑bottom or pointed‑bottom main machine. 1‑4 color printing unit is optional to realize integrated printing and bag making and reduce semi‑finished‑product turnover.Step 3: Matching and Verification of Key Parameters
Bag dimension check: The actual cutting length, bag width and bottom width from orders must fall within the machine’s processing range.
Handle‑process verification: Select Series T for round‑rope orders; Series F for flat‑rope orders; Series P for D‑cut bags; RKFD series for handle‑free square‑bottom bakery bags; RKJD series for pointed‑bottom bakery bags.Material verification: Check the applicable paper grammage of the machine to ensure the commonly‑used paper falls in the supported range; verify the maximum raw roll diameter and core inner diameter.Printing option verification: If orders require printing, evaluate whether to choose the model with in‑line printing unit and confirm the available printing colors.Site‑condition verification: Match workshop infrastructure including air pressure and total power supply; check overall machine dimensions to ensure enough space for installation, passage and maintenance.Step 4: Model Selection Based on Order Mix and Production Environment
Conditional logic matching:
‑ If orders are dominated by round‑rope shopping bags → Prioritize the RKHF‑T series roll‑fed paper bag machine;‑ If mainly producing simple D‑cut food carry bags → Prioritize RKFD‑P D‑cut models;
‑ If mostly manufacturing handle‑free square‑bottom food / bread bags and requiring integrated printing & bag‑making → Prioritize RKFD square‑bottom series with optional printing function;
‑ If producing large volumes of V‑shaped bakery pointed‑bottom bags with high‑speed requirements → Prioritize RKJD series roll‑fed paper bag machine;
‑ If covering a wide range of bag sizes with frequent type switching → Prefer wider‑format machines to cover multi‑size orders.
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