Differences between blow molding machine and bottle blowing machine

What is the difference between a blow molding machine and a bottle blowing machine? Blow molding machines and bottle blowing machines are common plastic production equipment in the industry. They have a large market coverage and many manufacturers have many similarities. Therefore, people often can't tell whether they need a blow molding machine or a bottle blowing machine. As a result, many people will find the wrong manufacturer and know that they will not produce after consulting. This article will introduce the differences between blow molding machine and bottle blowing machine in many aspects. Let's get to know.

Introduction of blow molding machine

Blowing 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 using the wind force blown out by the machine to make products. There are two types of extrusion blow molding machines and injection blow molding machines commonly used in plastic blow molding machines. The basic principles of the two types of equipment are basically similar. Both of them add resin into the extruder first, melt and blow to obtain finished products, The difference is that the process of the extrusion blow molding machine is extrusion stretch blow molding, and the process of the injection blow molding machine is injection stretch blow molding.

The blowing materials of the blow molding machine can be polyethylene, polyvinyl chloride, polypropylene, polystyrene, linear polyester, polycarbonate, polyamide, cellulose acetate and polyacetal resin. The product capacity can be from several liters to thousands of liters. The high-density polyethylene products can be widely used in food, chemical industry and liquid processing packaging.

Polyvinyl chloride (PVC) produced by the Company is widely used in cosmetics and washing industry due to its high transparency and airtightness, as well as in food containers and gas beverage packaging.

The advantage of the blow molding machine is that the plastic containers processed by the blow molding machine have high thickness, corrosion resistance and wear resistance, and can replace some of the ceramic containers. In addition, the containers for blow molding products have low cost, low processing difficulty and high efficiency.

Introduction to bottle blowing machine

Bottle blowing machine, as its name implies, is a kind of machine for producing bottles. It softens plastic particles into liquid, and then blows the prepared melted bottle embryo into different bottles. Common bottle blowing machines include extrusion bottle blowing machine, injection bottle blowing machine, and special structure bottle blowing machine.

The blowing process is also divided into one-step blowing method and two-step blowing method. The two-step blowing method is commonly used in most cases. The principle is to preheat and soften the bottle embryo through an infrared high temperature lamp, prevent the preheated bottle embryo into the prepared mold, inflate it under high pressure, and blow and pull it to the desired shape. The process of blowing and drawing is a two-way stretching. Therefore, in order to increase the mechanical properties of the bottle wall, and increase the tensile, tensile and impact strength, the PET chains are bidirectional extended and arranged. This stretching is also limited, and excessive stretching is not allowed. It is necessary to control the stretching inflation ratio.

The containers produced by the bottle blowing machine are price linked and safe, so they are often used to replace glass containers in beverage, medicine, cosmetics, food processing and other industries.

Differences between blow molding machine and bottle blowing machine

1. The principles are different. The small and medium-sized editors above have described the working principles of the two kinds of mechanical equipment. It can be seen from meditation that there are some differences between their plastic production principles. The production process of the blow molding machine is extrusion/injection stretching blow molding, and the bottle blowing machine is one-step blowing and two-step blowing.

2. Different products are produced. Bottle blowing machine refers to the machine for blowing bottles. The production of bottle blowing machine is convenient and convenient, and the molding volume is large. It mainly injects tubular preform or plastic injection into the mold to blow and mold the tube wall into a bottle shape. The blow molding machine needs plastics to be melted in the screw extruder and then quantitatively extruded. The complete products can be obtained through mouth film molding and cooling. It is more used to produce large barrels or warning posts, trays, floating barrels and other irregular blow molding products.

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