|
Any industry that needs to package material for sale or transport will likely need a bag sealer somewhere in the process. These machines are extremely common in the food industry, where airtight seals are a must for food safety and quality. They are also regularly used by industries that package and sell building materials or mulch. Package closers are simple machines that use heat or thread to close containers. They can be operated manually, by peal or autonomously. There are several factors to consider before choosing a device, including price, speed and versatility.
A bag sealer closes containers in one of two ways. It may either use heat to pinch and melt the top of the container closed, or it may sew the container closed. Some machines perform both functions and may do so simultaneously. Some machines fold or trim the top of the container before sewing or applying heat, because this improves the quality of the seal further. Much of the time, which machine to select comes down to personal preference, as long as FDA regulations are being followed and the device is compatible with the material the container is made from.
There are many forms a bag sealer may come in. Devices that sew the container shut can do so in a few ways. Straight sewers are the simplest and take a manually-fed paper or fabric sack and sew a single line of thread through it. This produces an effective bind but is not very fast. It is ideal for industries that deal in heavier materials, because this method is effective at handling a lot of weight. A sewing machine may also tape or fold the top of the container before applying the thread. This extra preparation produces a stronger fix and doesn’t require any extra time because it is done simultaneously. These machines can be used on most bags, though they are ideal for containers that are thicker.
Machines that use heat are more common for packages containing food because they produce an airtight seal. They are, however, only compatible with containers that can be closed using thermal energy. These devices come in multiple designs, including impulse heaters, constant heater and band machines. A bag sealer that uses impulse heat closes the package by contacting it with a heating element. This element is charged with a surge of electricity that lasts, at most, a few seconds. Impulse heaters can handle most container varieties, including polyethylene packaging. Constant heaters consist of two metal bars that press either side of the container closed. The intense heat melts the ends of the package together and creates an airtight bond. This is a popular choice because it is inexpensive to run, but it is not usually compatible with polyethylene containers. Band machines are similar to constant heaters, but use Teflon-infused bands to close the package shut.
If many containers need to be closed as quickly as possible, then an automated bag sealer will be the ideal choice. Most impulse and constant heaters need to be manually operated, which reduce their output somewhat. Sewing devices and band machines can be automated, however, which makes them a better pick when speed is a concern.
|
 600x600.jpg&w=50&h=50 "Sealing Machines & Systems")
 600x600.jpg&w=50&h=50 "Sewing Heads")
