plastic bag machine
WENZHOU SUNNY MACHINERY CO.,LTD SINCE 1999
Established 1999,name wenzhou jinghua machinery co.,ltd.exported machine to pakistan in 2007, exported machine to bangladesh 2008, exported machine to egypt 2009. and many other 50 coutries in these years.
Why Choose US
Our Factory
Established 1999,name wenzhou jinghua machinery co.,ltd.exported machine to pakistan in 2007, exported machine to bangladesh 2008, exported machine to egypt 2009. and many other 50 coutries in these years.
Our Product
Dry laminating machine and other common machine. One is for customerized machine, such as foil printing machine, foil slitting machine, wax coating machine,PVC wall paper machine and so on.
QUALITY ASSURANCE
Two work-shop. One is for gravure printing machine, slitting machine,dry laminating machine and other common machine.
Our Service
We sincerely welcome friends from all over the world to cooperate with us on the basis of long-term mutual benefits.
Roll-connecting Double Line Bag Making Machine
It is used for producing vest bag rolls and flat-opening bags rolls. The main motor save more electricity and regulate speed more freely. The color code tracker with good performance makes the sealing and cutting length more accurate and the error smaller. It adopts advanced computer to adjust the length more freely and accurately.
Medical Sterilized Paper Plastic Bag Making Machine
The medical sterilization pouch making machine is widely used to make sorts of bags for health care industry.The machine has good processing and assembly, beautiful appearance and reasonable structure. The machine runs smoothly with low noise and fast running speed.
Automatic T-shirt Plastic Bags Making Machine
It is applied to produce and print the double-colored or uncolored vest bags, using HDPE, LDPE roll film.This machine can make small biodegradable plastic bags,polythene bag,biodegradable carry bag,PP bag,plastic garbage bag ,biodegradable garbage bags ect.
Plastic Zip Lock Bag Making Machine
This machine can be widely used in the heat cutting plastic packaging products, such as self-seal bags, vest bags, gum sealing bags, woven bags, and so on.
Three Side Sealing Bag Making Machine
This machine suitable for laminated film of three-side bag-made machine to produce successively.
Automatic ARC PVC Bag Making Machine
This machine is suitable to make food PE (LDPE)(HDPE)arc type bag and other PVC shrink film bag, flat bag(when make flat bag need to add frond device.)
Biodegradable Polythene Carry Bags Manufacturing Machine
This machine is biodegradable plastic bag manufacturing machine suitable for making vest bag,T-shirt bag,biodegradable garbage bag,biodegradable plastic bag,grocery bag,eco friendly poly bags . The material is HDPE and LDPE.This is good manufacturing equipment of making plastic bag.
This is an automatic side sealing bag making machine, with additional or optional applications for making different baby diaper bags, such as loop handle diaper bags, euro type handle diaper bags, drawstring diaper bags...etc.Fully automatic production,easily operation.
This machine used to fold plastic film such as OPP, CPP, PP,PE,POF before making bag.This film folding machine is used for folding the single-layer sheet PP OPP film and then rewinding, which is an assistant equipment of the bag sealing and cutting machine for making garment bag, sock bag, towel bag, bread bag, ornament bag, underwear bag, stationary bag, electric element bag, bamboo article and wooden products bag etc. plastic packing bags.
What is Plastic Zip Lock Bag Making Machine
An Automatic Plastic Bag Making Machine is a type of machine that uses plastic film to make bags. It has two parts: a film forming system and a bag forming system. The film forming system has a roll that is used to fold the film into a bag. Its roll is supported by a pivot arm 52. The film forming system is used to produce a variety of types of bags. One type of bag is called a polyethylene bag. The bag is made of two layers of plastic film. The first layer of the film consists of a thin film and the second layer consists of a sleeve. The film forming system has a slit at one end.
Advantages of Plastic Zip Lock Bag Making Machine
Increased productivity
A plastic bag making machine is capable of producing large quantities of bags in a short period of time, increasing the overall productivity of the manufacturing process.
Customization
The machine can be customized to produce bags with specific features, such as handles, printing, and different colors, allowing manufacturers to create bags that meet their customers' needs.
Environmentally friendly
The use of plastic bags produced by a plastic bag making machine can help reduce waste and improve sustainability, as they are recyclable and reusable.
Versatility
The machine can produce a variety of plastic bags in different sizes and shapes, making it suitable for a range of applications and customer requirements.
Consistent quality
The machine's automated processes ensure that the bags produced are of consistent quality, with minimal defects and uniform dimensions.
Cost-effectiveness
The plastic bag making machine is designed to be cost-effective, reducing the cost of production and increasing profits.
High-speed production
The machine is capable of producing bags at a high speed, providing a fast and efficient production process.
Low labor costs
The plastic bag making machine is highly automated, reducing the need for manual labor and reducing labor costs.
The Operating Procedures of the Bag Making Machine
Operating procedures of the bag making machine:
Preparations before starting
Check whether there is dust and debris around the equipment and remove them.
Install the film roll according to the requirements of the production notice.
Adjust the size of the bag according to the production notice and process documents, install the heat sealing knife, and preliminarily adjust the position of the slitting knife and the heat sealing knife.
Turn on the power and set the temperature of the heat sealing knife according to the requirements of the process document.
Input the relevant data of bag making and the required number of each bundle.
Select the edge of the pattern with large color difference and adjust the sensitivity of the light eye to make it meet the requirements.
Start
Start the main motor, run at low speed, and then adjust the edge position control to divide the film in the middle position.
Adjust the left and right pinch rollers to align the left and right films, and adjust the front and rear pinch rollers to align the pattern.
Adjust the heat-sealing knife to make it heat-sealed within the required range of the bag.
Adjust the slitting blade to the desired position, and adjust the punching position to the scissors mouth.
Preliminarily adjust the speed of the machine, take a flat-out sample bag for initial inspection, and if it does not meet the specified requirements, take another flat-out sample bag for heat sealing value test.
Arrange the produced bags, and select the bags with quality defects (such as folding, tunnel, flower width, knife line, poor heat sealing, four seals, etc.) and bundle them according to regulations.
The machine quality inspector will carry out the inspection. After the inspection is qualified, the certificate will be pasted and sent to the quality inspection room for random inspection.
During the production process, observe the bag making situation at any time and find any abnormality and adjust it immediately.
Stop
Disconnect the main power switch, and then disconnect the power switch of each part.
Clean the machine hygiene and site hygiene, and send the products to the general inspection room.
Make a record of the shift, which is required to be accurate and clean.
Packing
Packing: The machine personnel will sort out the products in this process, select the unqualified products with quality defects (such as folding, tunnel, flower width, cutting line, poor heat sealing, four seals, incomplete patterns, etc.) The product is bundled and handed over to the machine quality inspector for inspection.
Inspection: The quality inspector of the machine will inspect the quantity and quality one by one. After the quantity and quality are all qualified, they will be put into the box according to the requirements and put into the packing list; Qualified" marked in the carton.
The machine personnel will send the products on duty to the appearance quality inspection room.
The general quality inspector will sample and inspect the products submitted for inspection according to the specified proportion, and pack them into storage after passing the inspection.
What Do You Need to Make Plastic Bags
Plastic Resin
Choose the appropriate plastic resin based on the desired properties of the plastic bags. Common types of resins include polyethylene (PE), polypropylene (PP), and polyethylene terephthalate (PET).
Extruder
This machine is used to melt and convey the plastic resin. The extruder typically consists of a screw that conveys, melts, and pumps the molten plastic through a die.
Winder
A winder is used to roll and wind the flattened film onto rolls. This process may include tension control to ensure uniform winding.
Die
The die is a circular tool through which the melted plastic is forced, shaping it into a continuous tube. The die determines the size and thickness of the film.
Cooling System
After exiting the die, the plastic tube is inflated using air to form a bubble. A cooling system, such as cooling rings, helps control the cooling of the film.
Nip Rollers
These rollers are used to flatten the inflated tube and maintain consistent thickness and width of the plastic film.
Trimming and Cutting Equipment
Machinery for trimming excess material and cutting the film into specific lengths suitable for making plastic bags.
Bag-Making Machines
These machines are used to process the plastic film through cutting, sealing, and shaping processes to create the final plastic bags.
Printing and Additional Processing Equipment
Additional equipment may be needed if you want to print designs on the bags or apply additional features such as lamination or coating.
• The three-side seal is to seal around the packaging bag. The size of the front and back are both the size of the finished product. It has a certain sense of integrity, the design is not restricted, and the front and rear designs have a certain degree of continuity. Since the front and back have the same size, the front can be designed first so that the back and the front can echo each other. When making a plate, the front and the back should be arranged on the same registration cylinder.
• The middle bottom seal is sealed on the back side. The size of the front side is the size of the finished product. The back side is divided into two equal parts, and the sum of their widths is equal to the width of the front side. Usually, the front side and the back side are unfolded for an integrated design during design, and Add 1cm edge banding on the left and right, and the front and back are also on the same registration cylinder.
• The three-dimensional middle seal is based on the middle and bottom seal, adding three-dimensional edges on both sides, and the front, back, and side 3 sides are also on the same registration cylinder.
• Due to the limitation of printing materials, the front and back of PE stretch film materials must be designed separately and plate-made separately, and cannot appear on the same registration cylinder at the same time.
The basic composition structure of a bag making machine contains: storage device, step device, frequency conversion device, entire bag device, hot seal cutting knife and control device. The main features are the raw materials that store the corresponding amount of the storage device. The step device drives the raw material. The frequency conversion device drives the hot seal cutting knife. After the entire bag is produced, the entire bag is produced. Seal and cut, control the overall coordination of the device in all aspects.
The bag transformer has functions such as automatic torque compensation, sliding compensation, and automatic voltage voltage. With the frequent start and stop of the motor, the motor can be effectively protected to avoid the impact of starting the current on the grid, and at the same time, it can effectively achieve energy conservation and consumption reduction.
The main control process of plastic bag making machines is as follows:
Open the murarous switch, and control the quantitative material by controlling the morale storage motor movement by the gas storage optoelectronics.
Open the heating control switch and warm up the hot knife through the temperature controller.
Drive the raw material action by stepping on the motor. Among them, the white bag seal is to determine that the step motor takes a fixed number of steps to achieve a fixed -length control; the color bag seal is detected by detecting the corresponding signal to stop the step motor to achieve positioning control.
After the stepping motor stops, the three -phase asynchronous motor drives the hot knife to seal and cut.
After the number of bags is set, the whole bag is performed.
Factors of Heat Sealing Quality of Bag Making Machine
Heat sealing temperature
The selection of the heat sealing temperature of the composite film is closely related to the function and thickness of the composite substrate, the model, speed, and hot air pressure of the bag making machine, which directly affects the heat sealing strength.
The sealing temperature of the composite film is determined by the viscous flow temperature or melting temperature of the heat sealing material, and the high temperature of the heat sealing can not exceed the decomposition temperature of the heat sealing material. The temperature between the viscous flow temperature and the decomposition temperature is the heat sealing temperature range of the heat sealing material, which is a key factor affecting and controlling the quality of heat sealing. The wider the heat sealing temperature range, the better the heat sealing performance, the easier and more stable the quality control.
Heat sealing pressure
The hot air pressure is supplied by the pressure spring on the bag making machine. The size of the heat sealing pressure is related to the function, thickness and heat sealing width of the composite film. The polar heat sealing material has a high activation function, and the temperature rise has a great influence on the decrease of its viscosity, so the required heat sealing pressure is small, and the molten material at the heat sealing part is prevented from being extruded, which affects the heat sealing effect. While PE and PP are non-polar materials, the activation function is extremely small, and the required pressure is high, which is beneficial to the heat sealing strength and interface sealing.
Heat sealing speed
The heat sealing speed shows the production efficiency of the bag making machine, and is also an important factor affecting the heat sealing strength and appearance. The faster the heat-sealing speed, the heat-sealing temperature should be increased accordingly to ensure that the heat-sealing strength and heat-sealing condition reach the optimum value; under the same heat-sealing temperature and pressure, the slower the heat-sealing speed, the better the fusion of the heat-sealing material. Sufficient and stronger, but not causing root-cutting phenomenon.
Cooling
The cooling process is to shape the welded seam that has just been melted and sealed at a lower temperature under a certain pressure, eliminate stress concentration, reduce the shrinkage of the welded seam, improve the appearance flatness of the bag, and improve the heat sealing strength.
The cooling water of the bag making machine is generally tap water or circulating water at about 20°C. If the water temperature is too high, the pressure of the cooling knife is not enough, the circulation of cooling water is not smooth, and the circulation volume is not enough, etc., it will lead to poor cooling and decrease of heat sealing strength.
Number of heat sealing
Most of the longitudinal and transverse heat sealing of the bag making machine adopts the hot plate welding method. The number of longitudinal heat sealing depends on the ratio of the effective length of the heat sealing knife to the length of the bag, and the number of transverse heat sealing is determined by the number of sets of heat sealing equipment on the machine. . Good heat sealing generally requires more than 2 times of heat sealing. Most of the transverse heat sealing equipment is 3 groups. In order to meet the heat sealing requirements of the wide side, transverse heat sealing equipment is often added, and the number of heat sealing times is added to reduce the heat sealing temperature and reduce the necking phenomenon. For longer standard packaging bags, multiple feeding techniques can be used to reduce the length of each feeding to one-half or one-third of the bag length, and then increase the number of heat-sealing times to improve the heat-sealing effect, but it will reduce production. Therefore, some bag making machines add the length of the longitudinal heat-sealing rod to increase the number of heat-sealing times and ensure the heat-sealing quality.
Heat sealing knife gap
The gap of the heat sealing knife refers to the pressure distance that the predetermined hot air pressure is transmitted to the heat sealing surface when the upper heat sealing knife contacts the bottom plate. At the same film thickness and the same heat sealing speed, the gap between the heat sealing knives is small, the heat sealing time is relatively short, and the heat sealing strength of the product will decrease. Generally, the heat sealing knife gap is set at 1.0~1.5mm, which is related to the film thickness, transfer function, bag making speed, etc.
Plastic bag making equipment includes components for cutting and sealing plastic film. The sealing bars and the knife member support are secured by bolts and are usually attached to an upper support 7. Guide tongue 43 is mounted on a movable shaft, which is fixed on an upper support 7. It has a beveled edge 45 located immediately below the cutting edge of the knife member 32 and a short distance away from the plastic film 2. The rubber seat 46 is made of a cylindrical cross section shaft.
The various types of plastic bag making equipment are classified into four categories: servo-drive machines, side-weld bag making machines, bottom-sealing machines, and T-shirt bag machines. The machines are fitted with various parts, such as servo motors, fingers, blowdowns, punches, vacuum arms, cams, and bottom seals. These machines are designed to produce multi-size bags at a high production rate and can be automated.
Aside from plastic bag making machines, automatic bag making machines are also available that can be used for a variety of materials. Some models produce cotton bags, jute, and net bags.
A Practical Guide to Zip Lock Bag Machine Maintenance
Step 1: Cleaning
Regular cleaning is the foundation of effective machine maintenance. Start by shutting down the machine and disconnecting it from the power source. Remove any debris, dust, or residue from the machine's exterior and interior components using a soft cloth or brush. Use appropriate cleaning agents recommended by the machine's manufacturer to clean the various parts thoroughly. Pay particular attention to the sealing mechanism and feed rollers, as any buildup or contamination can affect the bag's seal quality.
Step 2: Lubrication
Proper lubrication of the machine's moving parts is essential to prevent excessive wear and tear, minimize friction, and ensure smooth operation. Consult the machine's user manual to identify the specific lubrication points and recommended lubricants. Apply the lubricant sparingly to each designated point, avoiding excess oil that could attract dust or debris. Regularly lubricating the machine will extend its lifespan and help maintain optimal performance.
Step 3: Inspection
Regular inspections are crucial for identifying potential issues before they escalate into major problems. Inspect the machine thoroughly, paying attention to the alignment of belts, chains, and rollers. Look for any signs of wear, such as fraying belts or loose connections, and replace or repair them as necessary. Check for loose or damaged wiring, ensuring all connections are secure. Additionally, inspect the heating elements and temperature controls to ensure they are functioning correctly.
Step 4: Calibration
Calibration is an important step in maintaining the quality and consistency of the produced zip lock bags. Follow the manufacturer's instructions to calibrate the machine's sealing temperature and time. Use a calibrated thermometer to verify the accuracy of the temperature settings and make adjustments if necessary. Performing regular calibration ensures that the bags' seals meet the required standards and prevents issues such as weak seals or excessive heat exposure.
Step 5: Training and Operator Care
Alongside regular maintenance, providing proper training to machine operators is essential. Operators should be familiar with the operating procedures, safety precautions, and troubleshooting techniques specific to the machine. Emphasize the importance of regular maintenance tasks and encourage operators to report any abnormalities promptly. By instilling a culture of care and responsibility, you can prevent potential issues and ensure that the machine operates optimally.
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