600X3mm Double Cutting Knife Bag Edge Strip Cutter for Bag-Making Machines
600X3mm Double Cutting Knife Bag Edge Strip Cutter for Bag-Making Machines
This 600×3mm pneumatic bag edge strip cutter is a bridge-type double cutting knife installed on a bag-making machine. It removes excess strips between connected packaging bags, separates the bags and allows the cut scrap to fall downward. Pneumatic actuation makes it suitable for flexible packaging lines that require continuous edge trimming and reliable cutting.
Double Cutting Knife Bag Edge Strip Cutter for Bag-Making Machines
Product Overview and Customer Needs
During production, issues such as unstable cutting force, blade wear, or poor scrap discharge can lead to incomplete cuts, missed cuts, uneven edges, and production stoppages for scrap removal. The CRJ double-cutting punch unit utilizes a bridge-style frame, upper and lower blade assemblies, and a stable pneumatic drive system to achieve synchronized cutting; this helps minimize the need for manual scrap removal and supports continuous production line operation.
Suitable Customers: Packaging bag manufacturers that need to continuously remove narrow edge strips, separate connected bags, or customize cutting length and trim width to the film width.
Key Advantages
· Designed for Continuous Bag Production
The specified maximum cutting speed is 120 cuts per minute. Actual speed depends on material, thickness, cutting width, air supply, scrap discharge and synchronization with the bag-making machine.
· Stable Double Cutting
The double-cutting knife is manufactured to the confirmed dimensions and works with the bridge-type die base to cut both sides of the strip simultaneously, helping reduce missed cuts and unseparated material.
· AirTAC Pneumatic Actuation
AirTAC cylinders use compressed air to perform the cutting stroke. Cylinder specifications must be matched to knife length, material and target operating speed.
· Custom Dimensions and Installation
Available information includes 500×2mm and 600×3mm sizes. Other specifications can be evaluated according to film width, trimming requirements, installation space and machine interfaces.
Applicable Materials, Bag Types and Equipment
Applicable Materials
Compatible with PE, PO, PP, OPP, PVC, PPE, PPU, CPE and LDPE plastic films, as well as aluminum foil laminates, paper-plastic materials and non-woven fabric. Actual suitability depends on total thickness, number of layers, toughness, coating and target cutting speed. Sample testing is recommended for special materials, thick materials and multi-layer laminates.
Applicable Bag Types
Three-side-seal, center-seal and side-seal bags
Stand-up pouches, zipper bags and eight-side-seal bags
Food storage bags, snack bags and frozen food bags
Retail shopping bags and household product packaging bags
Paper-plastic composite bags and non-woven packaging products
Other flexible packaging that requires edge-strip removal or separation of connected bags
Applicable Equipment
The cutter is intended for fully automatic or continuous bag-making equipment. It’s easy to install without major machine modification; however, direct installation still requires confirmation of available space, mounting points, web direction, cutting position, air supply and control signals.
Customization and Selection Information
Customizable Items
Knife length and trim width
Bridge-type die-base dimensions and material passage
Mounting holes, fixing method and cutting position
Information Required for Quotation and Selection
Dimension drawing, photo or physical sample of the bag or edge strip
Material name, total thickness, number of layers and required cut quality
Edge-strip width, cutting length and cutting position
Order quantity, destination and requested delivery date
Installation, Operating Conditions and Maintenance
Pre-Installation Checks
Sufficient installation space and a stable mounting surface for the bridge-type die
Correct film travel direction, cutting position and scrap discharge direction
Dry compressed air with pressure and flow matching the confirmed configuration
Bag-making machine signals compatible with the pneumatic control components
Required safety guarding and service clearance around the knife assembly
Trial Run and Production
After installation, run the machine unloaded at low speed to check cylinder movement and knife alignment.
Make a small number of trial cuts using the actual material and check for unseparated material, burrs or scrap buildup.
Increase the speed gradually while monitoring air supply, synchronization and scrap discharge.
Begin continuous production only after confirming the cut dimensions and bag separation result.
Routine Maintenance
Check fasteners, air tubes, fittings and knife assembly position before startup
Clean the scrap discharge passage regularly to prevent strip entanglement or buildup
Monitor blade wear, chipping and changes in the cut edge
Stop the machine immediately if abnormal noise, resistance, air leakage or missed cutting occurs
Maintain the guide and pneumatic components as instructed
Safety Warning: Stop the machine and release air pressure before adjustment, cleaning or blade replacement. Never place hands in the cutting area or scrap passage while the machine is running or pressurized.
After-Sales Support
Packaging and Shipping
Before shipment, the product is cleaned and given necessary protective treatment, then secured with foam, corner protectors and rigid packaging. Large or batch orders may use wooden cases according to weight and transport method. Shipping is available by DHL, FedEx, UPS, TNT, air freight, sea freight or the customer’s nominated forwarder. Costs, trade terms and estimated transit time are subject to order confirmation.
After-Sales Support
Before shipment, each product will undergo operating and cutting tests. The test video will be sent to the customer for approval, and shipment will be arranged only after confirmation. When correctly installed and used under confirmed operating conditions, the product is generally stable in operation. If the customer encounters installation or use issues after receipt, on-site photos, videos and operating information may be provided, and the CRJ technical team will assist remotely with troubleshooting and operating guidance. If a component develops a problem within three months, corresponding replacement-parts support is available. All customers who purchase CRJ products receive free lifetime technical guidance.
Why Choose CRJ？
Established in 1996
The CRJ Group has long focused on plastic bags, flexible packaging, precision pneumatic punches and cutting dies.
Precision Manufacturing Capability
The company is equipped with CNC machining centers, high-precision slow-wire EDM and medium-speed wire-cut EDM equipment. Dedicated R&D and assembly-and-commissioning departments provide comprehensive assembly and testing capabilities.
Punching and Cutting Product Portfolio
Products include interchangeable punches; round-hole, tear-notch, butterfly-hole, multi-hole, triangular-hole and handle-hole punches; custom-shaped punches; heat-sealing bar; pneumatic double cutting die; and punching die for vertical packaging machines.
Customization and Technical Support
Engineering evaluation is available based on drawings, samples and machine installation conditions, together with selection, installation, troubleshooting and maintenance guidance.
Figure 1. CRJ R&D, production and precision manufacturing capabilities (image from the original product document)
FAQ
Can this double cutter be installed directly on my bag-making machine?
The double cutter is compatible with various bag-making machines on the market, but installation space, mounting dimensions and cutting position still need to be confirmed. Please provide photos or video of the bag-making machine and the installation dimensions before quotation.
What does 600×3mm mean?
600×3mm means the double cutter is 600mm long and 3mm wide.
Can you customize 500×2mm or other sizes?
Based on the available product information, 500×2mm, 600×3mm and other custom sizes can be evaluated. Final dimensions depend on film width, trimming requirements and installation space.
What is the maximum cutting speed?
The maximum cutting speed is 120 cuts per minute. Actual speed depends on material, thickness, knife length, air supply, synchronization and scrap discharge conditions.
What is the reference service life?
Under normal installation, use and maintenance conditions, the reference service life is 10-12 million cycles. Actual life is affected by the material, thickness, operating speed and maintenance conditions.
Which materials can it cut?
Available information covers various plastic films, laminated films, paper-plastic materials. Special materials, thick materials and multi-layer laminates should be sample-tested first.
Can the edge-strip scrap discharge automatically?
Yes.
What are the minimum order quantity and lead time?
MOQ=1 and a reference lead time of 15-20 working days after payment. Custom orders are subject to drawing approval, payment and production scheduling.
What information is required for a quotation?
Please provide a dimension drawing, photo or physical sample of the bag or edge strip; the material name, total thickness, number of layers and required cut quality; the edge-strip width, cutting length and position; and the order quantity, destination and requested delivery date.
Request a Custom Bag Edge Strip Cutting Solution
For a 600×3mm, 500×2mm or other pneumatic bag edge strip cutter, send the bag drawing, material sample, target trimming dimensions and machine installation information. CRJ will help confirm the knife dimensions, bridge-type die-base structure, cylinder configuration, installation method, trial-cutting arrangement, production lead time and quotation.
Product Specifications
Specification
Reference Configuration and Notes
Product Name
600×3mm Pneumatic Bag Edge Strip Cutter / Double Cutting Knife
Reference Knife Size
Double cutter, 600mm long × 3mm wide
Other Documented Size
500×2mm; other dimensions evaluated on request
Frame Structure
Bridge type
Drive Type
Pneumatic
Maximum Cutting Speed
120 cuts/min; actual performance depends on the material and machine conditions
Reference Service Life
10-12 million cycles under normal installation, use and maintenance conditions
Cylinder
AirTAC; exact specification subject to the confirmed configuration
Die-Base Material
Aluminum alloy
Scrap Discharge
Falls downward after cutting; actual discharge depends on installation and material
Installation
Customized to the machine space, mounting position and material travel direction
Control Method
Works with pneumatic control and the bag-making machine synchronization signal; interfaces and voltage confirmed before order
Minimum Order Quantity
1 set
Reference Lead Time
Original information states 15 working days after payment; custom orders depend on drawing approval, payment and production schedule
Pricing Basis
Knife dimensions, trim width, material passage, installation method and quantity
Place of Origin
Dongguan, Guangdong, China
Specification Note: All speeds and material ranges must be verified against the customer’s sample, total thickness, number of layers, air supply, machine synchronization and continuous test results. Final specifications are subject to the technical drawing and quotation approved by both parties.
Product Structure and Materials
Component
Function
Bridge-Type Aluminum Die Base
Supports the knife assemblies, cylinders and guide structure while providing space for film passage and downward scrap discharge.
Double-Knife Assembly
Cuts both sides of the strip simultaneously; knife length, width and edge structure are configured to the trimming requirement.
AirTAC Cylinders
Provide pneumatic cutting force; bore, stroke and quantity are determined by engineering selection.
Guiding and Positioning Mechanism
Helps maintain the travel direction and relative position of the upper and lower knife assemblies, reducing misalignment and abnormal wear.
Scrap Discharge Passage
Moves the cut strip away from the cutting area to reduce buildup and cleaning-related downtime.
Pneumatic round hole punching molds for plastic bags are specialized punching equipment used in the production of plastic packaging bags. They rely on air to drive the punching action and are widely used in PE, PP, OPP and other film bags to punch various round holes such as hanging holes and venting holes. They are the preferred equipment for high-end mass production in the flexible packaging and bag making industries.
It is used to punch V-shaped easy-tear notches into plastic packaging bags/pouches and is compatible with various bag types and notch positioning requirements.
It utilizes a Japanese wire EDM machine with a rounded cutting edge, an imported high-speed steel punch, and an Airtac cylinder. The resulting notch is smooth, burr-free, and precisely aligned, ensuring smooth tearing without deviation. The notch size, depth, direction, and installation method can all be customized.
Innovative Interchangeable Hole Puncher Revolutionizes Efficiency and Maintenance
In a groundbreaking advancement for the plastic packaging industry, our company proudly announces the release of our best-selling interchangeable punching machine. Designed to address key inefficiencies and high maintenance costs associated with traditional punching machines, this innovative product is already making waves in the market.
Efficiency and Versatility
One of the standout features of our interchangeable punching machine is its versatile punching needle. Unlike conventional machines with fixed hole types, our machine allows for the replacement of the punching needle with specific sizes and hole types. This flexibility greatly enhances the efficiency of the punching process, providing manufacturers with a wider range of options and significantly reducing downtime.
Cost-Effective Maintenance
Maintenance costs have long been a concern for businesses using punching machines, but our new model addresses this issue head-on. When the punching needle becomes dull from long-term use, instead of incurring high maintenance costs, users can simply pay a small fee for shipping and a new punching needle. This cost-effective solution ensures the machine continues to operate at peak performance without the financial burden of extensive repairs.
Ease of Replacement
Another notable advantage of our interchangeable punching machine is the ease of replacing the punching needle. The process is straightforward and user-friendly, eliminating the need for specialized technicians and minimizing production delays. This feature makes our machine not only efficient but also highly practical for everyday use.
Our interchangeable punching machine represents a significant leap forward in both efficiency and creativity. By addressing common pain points and providing a flexible, cost-effective solution, we are empowering businesses to optimize their production processes and reduce maintenance expenses.
We invite you to experience the innovation and efficiency of our best-selling interchangeable punching machine. For more information and to see how this product can benefit your operations, please visit our company homepage.
About Our Company
As a leading manufacturer of plastic packaging machinery and accessories, we are committed to delivering innovative solutions that drive efficiency and reduce costs for our customers. Our dedication to quality and customer satisfaction continues to set us apart in the industry.
Thank you for your continued support. We look forward to helping your business achieve greater success with our latest innovations.
Our Company Shines at Chinaplas International Rubber & Plastics Exhibition
Our company participated in the Chinaplas International Rubber & Plastics Exhibition held at the National Exhibition and Convention Center in Shanghai on April 23, 2024. We were pleased to attend this event and achieved great success.
As a professional manufacturer of plastic packaging machinery and accessories, our goal was to expand our business and forge new partnerships. We were honored to have the opportunity to meet with customers from around the world and engage with them.
During the exhibition, we showcased our advanced technology and innovative products to a global audience, and we were thrilled with the positive response we received. We are proud to announce that we successfully reached several cooperation agreements during the exhibition, further expanding our markets and advancing our business. This gives us great confidence and enthusiasm for the future.
We want to thank all our customers who visited our booth, especially those who established cooperative relationships with us. Your trust and support mean a great deal to us, and we look forward to future opportunities for cooperation.
Chinaplas was an unforgettable experience that solidified our belief in a bright future for the plastic packaging industry. We are excited to see you again next year in Shenzhen!
Thank you for taking the time to read our press release. We invite you to learn more about our business and products on our company homepage.
Welcoming Our loyal Indian Customers: Strengthening Partnerships and Celebrating Success
We had the pleasure of hosting our long-term Indian customers at our company recently, and it was an incredibly enriching experience. Their visit underscored the importance of mutual assistance and collaboration in the packaging machine accessories industry.
It was wonderful to discuss the vital role our punching machines and packaging machinery play in their operations. These conversations highlighted how essential it is to maintain strong partnerships that enable us to support each other’s growth and success. Sharing insights and experiences with our customers always brings fresh perspectives and innovative ideas to the table.
During their visit, our customers brought a new batch of purchase orders, signaling their continued trust in our products and services. This not only strengthens our business relationship but also motivates us to keep pushing the boundaries of quality and efficiency. Seeing their enthusiasm and commitment to our long-term cooperation was truly inspiring!
One memorable moment from their visit was a detailed discussion about a particularly challenging project we tackled together last year. By leveraging our punching machines and their operational expertise, we successfully streamlined their packaging processes, resulting in significant cost savings and increased productivity. This success story is a testament to what we can achieve through collaboration and innovation.
We are excited about the future and the potential for even greater achievements through our partnership. The shared vision and mutual support between our teams create a strong foundation for continued success. We are committed to delivering top-notch products and exceptional service, ensuring that our customers remain competitive and successful in their markets.
At CRJ, we provide professional manufacturing and engineering services specializing in customized punch dies for flexible packaging. We help global packaging converters, converting plant managers, and machine operators break free from the inflated costs, rigid restrictions, and lengthy lead times associated with traditional OEM-only replacement cycles.
Whether you require precision replacement tooling or bespoke configurations for new bag styles, our custom engineering service is built to transform your technical drawings into high-performance, durable pneumatic hole punch solutions.
We do not just supply off-the-shelf components; we engineer custom pneumatic hole punching systems designed around your precise mechanical specifications:
Drawing-Based Non-Standard Customization: We manufacture punch pins, die blocks, and complete assembly units strictly according to your CAD files, engineering drawings, or physical sample parts.
Universal Machine Compatibility: Our custom tooling services extend seamlessly across all major packaging and converting machinery brands, including wicketing machines, side-sealing machines, and stand-up pouch lines.
Material & Durability Engineering: We consult on and utilize premium tool steel grades (such as SKH-9, ASP-23, and carbide inserts) optimized for specific film substrates—from standard PE/PP to abrasive laminates and biodegradable films.
We have optimized our procurement and production pipeline to ensure a frictionless experience from initial design submission to final dispatch:
Step 1: Submit Drawing or Sample: Share your technical drawings, sketches, or worn sample pieces with our engineering team.
Step 2: Technical Review & Quotation: We conduct a thorough feasibility check, recommend optimal materials, and provide a transparent, competitive quotation.
Step 3: Precision Manufacturing: Using advanced CNC grinding, wire EDM, and strict optical QA, your tooling is fabricated to exact micron tolerances.
Step 4: Rapid Production & Delivery (10–15 Days): Standard custom orders are completed and dispatched within 10 to 15 working days, depending on complexity and volume.
Step 5: Flexible Order Terms (MOQ = 1): Benefit from a low minimum order quantity of 1, supporting both emergency single-piece replacements and large-scale rollouts.
Service Feature
Traditional OEM Supplier
CRJ Custom Service
Customization Capability
Strictly catalog-based; resistant to non-standard drawing modifications.
100% built to your exact technical drawings and specifications.
Production Turnaround
4 to 8 weeks due to international supply chains and backorders.
Rapid 10–15 working days production lead time.
Minimum Order Quantity
High batch requirements or penalty fees for small quantities.
MOQ = 1; fully flexible for single prototypes or bulk orders.
Pricing & Cost Structure
Heavy brand markups and exclusive distribution tiers.
Direct factory pricing maximizing your operational ROI.
Ready to Upgrade Your Packaging Production?
Send us your technical drawings today to experience precision custom tooling backed by rapid 10–15 day delivery and an MOQ of 1.
THE COMPANYWELCOME TO
DONGGUAN CRJ MOULD TECH CO.,LTD is a leading Chinese manufacturer offering a wide range of pneumatic hole punching machine for flexible packaging industry
