How does our new blow molding looks like?
Look at the picture of our new blow mold – is look great, isn’t it? We had been produced it for manufacturing a plastic bottles of PET.
Blow molding is the third most common important process for plastic production after extrusion and injection molding. It is used to produce a range of hollow articles for example bottles, fuel tanks and other large containers.
In general, there are three main types of blow molding: Extrusion blow molding, injection blow molding and injection stretch blow molding.
What is Extrusion Blow Molding?
The parts are extruded into two mirror molds and have a visible seam dividing the bottle in half. Compared to other blow molding processes, extrusion blow molding generates little waste, all of which is recyclable. In addition, blow molding is distinguished by the hollow tube extruded from the machine to form the pieces.
In general, there are three main types of blow molding: Extrusion blow molding, injection blow molding and injection stretch blow molding.
What is Extrusion Blow Molding?
The parts are extruded into two mirror molds and have a visible seam dividing the bottle in half. Compared to other blow molding processes, extrusion blow molding generates little waste, all of which is recyclable. In addition, blow molding is distinguished by the hollow tube extruded from the machine to form the pieces.
Extrusion Blow Molding Process
Extrusion blow molding begins with the formation of a parison, which is a plastic tubular preform. Plastic pellets are loaded into a hopper and fed into an extruder screw with a heating unit. As the pellets pass through the screw, they become molten and are pumped toward the die head.
The liquid plastic flows horizontally and then downward and emerges as a soft tube preform. The preform, called a parison, is then extruded by compressed air as two molds simultaneously come together to form a cavity in the shape of the container. The plastic balloons out and is stretched thin into the mold cavity, taking its shape.
The mold cavity is then chilled by cold water running through the molds. The newly formed part will always have a seam where the two mirror molds came together and a small point at the bottom where the plastic balloon started. Some parts may have excess plastic that needs trimming from the neck or parting lines. The newly formed plastic parts are then put through post forming operations, including drilling, die cutting, milling, painting, and adding decals or labels. Each container or part only takes a few seconds to form and may be done in high volumes. Therefore, they are formed in a continuous or intermittent method.
That is exactly the process, for which our new blow mold is designed to produce plastic bottle (shown in the picture).
However, extrusion blow molding molding is the one commonly employed for moldings such as shampoos and detergent containers, plastic drums and bottles.
Injection blow molding process
Injection blow molding is a manufacturing process used to produce hollow plastic objects, by injecting molten plastics into a mold, cooling it, and then inflating it with air.
Injection blow molding is most commonly employed for the production of transperant soft drinks containers.
The advantage of injection blow molding process produces high quality hollow objects with excellent dimensional accuracy and surface finish.
The disadvantage of this process is that it has limitations over wall thrickness.
In our company, we have a goal to provide complete solution for a big range of molding processes, now including and blow molding processes.
Extrusion blow molding begins with the formation of a parison, which is a plastic tubular preform. Plastic pellets are loaded into a hopper and fed into an extruder screw with a heating unit. As the pellets pass through the screw, they become molten and are pumped toward the die head.
The liquid plastic flows horizontally and then downward and emerges as a soft tube preform. The preform, called a parison, is then extruded by compressed air as two molds simultaneously come together to form a cavity in the shape of the container. The plastic balloons out and is stretched thin into the mold cavity, taking its shape.
The mold cavity is then chilled by cold water running through the molds. The newly formed part will always have a seam where the two mirror molds came together and a small point at the bottom where the plastic balloon started. Some parts may have excess plastic that needs trimming from the neck or parting lines. The newly formed plastic parts are then put through post forming operations, including drilling, die cutting, milling, painting, and adding decals or labels. Each container or part only takes a few seconds to form and may be done in high volumes. Therefore, they are formed in a continuous or intermittent method.
That is exactly the process, for which our new blow mold is designed to produce plastic bottle (shown in the picture).
However, extrusion blow molding molding is the one commonly employed for moldings such as shampoos and detergent containers, plastic drums and bottles.
Injection blow molding process
Injection blow molding is a manufacturing process used to produce hollow plastic objects, by injecting molten plastics into a mold, cooling it, and then inflating it with air.
Injection blow molding is most commonly employed for the production of transperant soft drinks containers.
The advantage of injection blow molding process produces high quality hollow objects with excellent dimensional accuracy and surface finish.
The disadvantage of this process is that it has limitations over wall thrickness.
In our company, we have a goal to provide complete solution for a big range of molding processes, now including and blow molding processes.