Extrusion blow molding machine or PET bottle blowing machine?

Which is better, extrusion blow molding machine or PET bottle blowing machine? Extrusion blow molding machine and pet bottle blowing machine are commonly used plastic production equipment. The two are similar but there is a certain height difference. The production products are highly overlapped. Some customers have made difficulties when choosing. The production efficiency is higher and more energy-saving. This article will analyze the difference between the two types of equipment to judge better. Let’s understand together.

MEPER Blow Molding Machine

I Principle comparison

1. The principle of blow molding machine, blow molding machine is a kind of plastic machine processing equipment. After the liquid plastic is sprayed out, the plastic body is blown into a mold cavity of a certain shape by the wind force blown by the machine to make products, plastic products. There are two kinds of extrusion blow molding machines and injection blow molding machines commonly used in blow molding machines. The basic principles of the two types of equipment are basically similar. Both are first added to the extruder, and then blown to obtain the finished product. The difference is that The extrusion blow molding machine process is extrusion-stretching-blow molding, and the injection blow molding machine process is injection-stretching-blow molding.

The blowing material of the blow molding machine can be selected from polyethylene, polyvinyl chloride, polypropylene, polystyrene, linear polyester, polycarbonate, polyamide, cellulose acetate and polyacetal resin. The volume of products produced can range from a few liters to thousands of liters, and the high-density polyethylene products produced can be widely used in food, chemical and processing liquid packaging.

The produced polyvinyl chloride is widely used in the cosmetic and washing industries because of its high transparency and air tightness, and is also used in food containers and gas beverage packaging.

The advantage of the blow molding machine is that the plastic container processed by the blow molding machine has high thickness, corrosion resistance and wear resistance, and can replace a part of the ceramic container. In addition, the cost of the blow molding product container is low and the processing difficulty is low. ,efficient.

2. The principle of the bottle blowing machine. As the name suggests, the bottle blowing machine is a machine for producing bottles. It softens plastic particles into liquid, and then blows the melted preform into different bottles. The common bottle blowing machine has extrusion. There are three types of blow molding machine, injection blow molding machine and special structure blow molding machine.

In the blowing process, it is also divided into one-step blowing method and two-step blowing method. Most of the two-step blowing method is commonly used. Go to the finished mold, inflate it with high pressure, and blow it into the desired shape. The blow-stretching process is a two-way stretch, so in this process, in order to increase the mechanical properties of the bottle wall and increase the tensile, tensile and impact strength, the PET chains are extended and arranged in two directions. This stretching is also limited, and it cannot be stretched too much, and the stretch-to-blowing ratio needs to be controlled.

The price of the container produced by the blow molding machine is relatively high, so it is often used instead of glass containers in beverage, medicine, cosmetics, food processing and other industries.

MEPER Blow Molding Machine Parts

II Characteristics comparison

If only from the principle point of view, blow molding machine and bottle blowing machine focus on different fields, each has its own advantages, blow molding machine is suitable for a wider range, and bottle blowing machine is more suitable for the production of some small plastic products. Let's continue the comparison, this time to compare the characteristics of the two devices.

1. Blow molding machine, the blow molding machine has the characteristics of high thickness corrosion resistance, wear resistance, etc. The die head also adopts a chrome-plated screw mandrel structure to make the unloading more even and smooth, and to better complete the blown film, complex film blowing machine The structure makes the output gas more uniform, and the hoisting unit also adopts a square frame structure, which can be adjusted according to production needs.

2. Bottle blowing machine, the main features of the hollow container produced by the blowing machine are light weight, low price, high safety, and are widely used in beverage, medicine, cosmetics, food and chemical industries. The equipment has strong clamping force and long service life , but also more suitable for the production of jars.

By comparison, we can see that the two types of equipment really have their own merits. If we have to judge who is better, I think it depends on the usage. If the capacity of the equipment to be produced is small, it is better to choose a blow molding machine. If it is a large plastic product, barricades, 1000L buckets will be better.

The above is all about the blow molding machine and the bottle blowing machine. I hope my article will be helpful to you.