Automatic Zipper Bag High Frequency Welding Machine

Product Introduction

In large-scale production of PVC zipper bags, the most troublesome issues are dead folds and partial delamination at the sealing joint of zippers and bags. High-frequency sparking can easily damage molds if not careful, which not only affects the qualified product rate but also delays the production schedule. The Automatic Zipper Bag High Frequency Welding Machine specifically addresses these problems. By combining servo precision positioning with high-frequency molecular welding technology, it achieves perfect fusion between zippers and bags. Equipped with a dedicated zipper thermal shrinkage compensation design, it fundamentally avoids sealing defects, meeting the efficiency requirements of mass production while stably ensuring product quality.

Product Features

The NL5557 spark protection system features fast response speed, instantly cutting off high-frequency output before spark hazards occur. It not only protects expensive molds from burnout but also avoids material waste and reduces production losses.

The servo precision positioning and pressing structure controls the alignment error between zippers and bags within 0.2mm. Combined with adjustable gradient pressure, it achieves smooth sealing even at the critical crossing points of zipper ends and bag edges, with no dead folds or delamination.

The exclusive zipper thermal shrinkage compensation module allows parameter adjustment according to the thermal shrinkage rate of different zipper materials. It solves the problem of poor sealing caused by shrinkage differences between zippers and films, ensuring the finished products maintain sealing performance even after repeated opening and closing.

Product Parameters

Item	YJ-ST-5KW	YJ-ST-8KW	YJ-ST-12KW
Power	5KW	8KW	12KW
Voltage	380V 50/60Hz	380V 50/60Hz	380V 50/60Hz
Frequency	27.12MHz	27.12MHz	27.12MHz
Input Power	8KVA	15KVA	25KVA
Rectifier	Silicon Diode	Silicon Diode	Silicon Diode
Electron Tube	7T85RB	7T69RB	3130RB
Pressure	350KG	350KG	500KG
Interval	150MM	150MM	150MM
Inner Size	150MM	150MM	150MM
Upper Size	300×120MM	300×120MM	300×120MM
Lower Size	750×350MM	750×350MM	750×350MM
Welding Time	0-10S	0-10S	0-10S

Place Detail Page Pictures

Application Scenarios

Large-scale production of PVC zipper bags for food/daily necessities: In the packaging production of snacks, toiletries and other products, poor sealing and appearance defects are often caused by zipper sealing problems. The servo positioning and thermal shrinkage compensation functions of this equipment ensure that each batch of zipper bags has flat and firm seals with qualified sealing performance. Combined with the NL5557 spark protection system, it enables continuous production without the risk of mold damage, significantly improving the yield rate and stability of mass production.

FAQ

1.Can this machine solve the problem of dead folds at the crossing points of zipper ends and bag edges during production?

A: Yes. Equipped with a servo precision positioning and pressing structure and a zipper thermal shrinkage compensation module, the machine can accurately match the shrinkage differences between zippers and films. It achieves uniform pressure welding even at crossing points, completely avoiding dead folds.

2.High-frequency sparking during welding is prone to mold burnout. How to avoid this problem?

A: The equipment is equipped with a highly sensitive NL5557 spark protection system, which can detect discharge hazards in advance and instantly cut off high-frequency current. It prevents sparking from the source, protects molds from damage, and reduces material waste.

3.Do I need to frequently adjust parameters when producing PVC zipper bags of different thicknesses?

A: No frequent adjustments are needed. The PLC control system can store multiple sets of production parameters for materials of different thicknesses. When switching, you can directly call the preset programs. Combined with adjustable gradient pressure, it can quickly adapt to the production needs of 0.4-1.2mm thicknesses.

4.Can the sealing strength of finished zipper bags withstand repeated opening and closing?

A: Absolutely. High-frequency molecular welding technology achieves deep fusion between zippers and bags. Combined with precise pressure control, the sealing strength far exceeds industry standards. Tests show that it will not delaminate even after more than 100 repeated openings and closings, maintaining good sealing performance.

5.Can the machine identify the zipper position and align it automatically?

A: Yes. The servo positioning system combined with an optical detection device can automatically identify the zipper position and align it precisely, with an alignment error ≤0.2mm. No manual auxiliary adjustment is required, ensuring the zipper position of each finished product is accurate.

6.Will slight oil stains on the material surface cause sparking during production?

A: No. The NL5557 spark protection system has extremely high sensitivity. Even if there are slight impurities on the material surface, it can detect them in advance and trigger protection. At the same time, the equipment's high-frequency shielding design can reduce the discharge risk caused by impurities.

7.How long does it take to adjust the equipment when changing to the production of zipper bags of different widths?

A: It can be completed within 5 minutes after proficient operation. By entering the target width parameters through the touch screen and cooperating with the quick-adjustment positioning device, you can switch specifications without disassembling core components.

8.Will scorch marks on the mold after long-term use affect the sealing effect?

A: No. The pressing structure of the machine supports quick mold disassembly, facilitating regular cleaning of scorch marks. At the same time, the NL5557 system can avoid discharge points on the mold caused by scorch marks, ensuring stable sealing effect even after long-term use.

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