Chinese Pet Bottles Have Rich Experience

The hollow blow molding of the Pet Preform is to insert the tubular PET which is still softened from the extruder into the molded pet preform mold, and then pass the compressed air, and use the pressure of the air to make the along the cavity. The deformation is thereby blown into a hollow product having a short neck opening. Hollow blow molding has been widely used to produce a variety of thin shell hollow products, chemical and daily packaging containers, as well as children’s toys.
Hollow blow molding (also known as blow molding) is a method of inflating a hot-melt shaped embryo closed in a mold by means of gas pressure to form a hollow product, and is a third common PET processing method, and is also developing rapidly. A PET molding method.
The mold for blow molding has only a female mold (female mold). Compared with injection molding, the equipment has lower cost, strong adaptability, good formability (such as low stress), and can be formed with complex undulating curves (shapes). product.
Blown grade PET includes: polyolefin, engineering PET and elastomer; blow molding applications involve automotive, office equipment, household appliances, medical, etc.; can produce 60,000 bottles per hour and can also manufacture large blow moldings (The weight of the piece is up to 180kg), the multi-layer blow molding technology has been greatly developed; the blow molding equipment has adopted the closed-loop control system of microcomputer and solid-state electronics, and the blow molding machinery is more specialized and more distinctive.
Welcome to choose Jilian mold, our brand has many years of business experience, is a China Pet Bottle manufacturer that you can trust and love, our professional team can provide you with effective advice and caring service, choose us is the choice A trust.

Blow Molding Process Of Pet Preform

Multi-layer blow molding process
Multi-layer blow molding is the use of several plastics to make a multi-layer composite Pet Preform in a suitable manner and then formed by a general blow molding process.
Multi-layer blow molding is mainly to meet the higher demand for plastic packaging containers such as barrier properties, flame retardancy, weather resistance, heat insulation, internal and external dichroism, etc. for cosmetics, pharmaceuticals and foods.
For example, a double-layer blow molded bottle with an outer layer of PVC and an inner layer of PE, the outer layer of PVC provides good barrier properties, rigidity, flame retardancy and weather resistance, while the inner layer PE makes the bottle non-toxic to the package. Excellent chemical resistance.
Typical applications for multilayer blow molded articles are the packaging of milk, natural juices, tea, ketchup, carbonated soft drinks (CSD) and beer.
Multi-layer extrusion blow molding refers to the plastic preforms of different kinds of plastics after being plasticized by a plurality of extruders, and then formed into a billet layer which is layered and tightly bonded together by a special machine head, and then fed into a blow mold. A technique for inflating a multi-layer hollow article.
This blow molding technology is developed on the basis of single-layer extrusion blow molding. The molding process is almost the same as that of single-layer extrusion blow molding, except that the molding equipment uses multiple extruders to plasticize different types of plastics. The machine head used should be able to extrude the tubular structure of the multi-layer structure, and the three-layer tube blank extrusion equipment

Injection stretch blow molding process
Stretch blow molding: a blow molding process by biaxially oriented stretching, which is divided into a one-step injection drawing process and a two-step injection drawing process.
One-step method: hot pet preform method
Pet preforms, stretching, and blow molding are done in one machine. Pet preforms are semi-finished products in the production process.
The combination of devices is:
1 consists of an extruder and a blow molding machine;
2 consists of an injection machine and a blow molding machine.
Two-step method: cold pet preform method
After the pet preform is cooled, the cold pet preform is reheated for stretching and blow molding. Including injection of preforms for stretch-blow molding of pet preforms; extrusion of pet preforms by directional stretch blow molding.
There are currently four combinations of stretch blow molding:
1-step extrusion stretch blow molding for processing PVC;
2 two-step extrusion stretch blow molding for processing PVC phase PP;
3 one-step injection stretch blow molding for processing PET and RPVC;
4 two-step injection stretch blow molding for processing PET.
Blow molding materials: PAN, PET, PVC, PP, etc.
01. Injecting pet preforms into a directional stretch blow molding process
The bottomed pet preform is first injection molded and continuously sent to a heating furnace (infrared or electric heating) by a conveyor belt (or a rotating belt), heated to a stretching temperature, and then incorporated into a blow mold by means of a stretching rod. Stretched and then inflated. It is necessary to control the appropriate stretching temperature, and it can be molded by multi-cavity (2-8), and the production capacity can reach 250-2400 per hour (capacity is 340-1800g beverage bottle).
02. Extrusion pet preform blank oriented blow molding process
The plastic is first extruded into a tube and cut into a length to serve as a cold billet. Put it into the heating furnace and heat it to the stretching temperature, then take the heated pet preform from the furnace to the molding table through the conveying device, so that one end of the pet preform forms a bottle neck and a thread, and the pet preform is along the axis. After pulling 1.0-1.3 times, the blow mold was closed for inflation molding.
Another method is to take out the heated pet preform from the furnace, stretch it in the axial direction of the tube in the stretching device, and send it to the blow mold. The mold inflates the stretched pet preform and inflates it. Forming and trimming waste edges. The production capacity of this method can reach 3,000 bottles per hour and the capacity is one liter.
Applications: PET beverage bottles, PP bottles, PC bottles

Choosing a professional China Pet Bottle manufacturer, Jilian Plastic is your good choice. Whether it is in the design, production or follow-up service, you will get the most satisfaction.

The Color Design Of China Pet Bottle

Seizing the consumer’s consumer psychology can open up a very good market. The long-term development of Pet Preform manufacturers recognizes that the color of pet preforms has a great influence on their own development. People at different stages do not choose the color of PET bottles. In the same way, I have such personal feelings, and my favorite color is chosen to buy.

The psychological effects of color have a certain impact. As our age changes, children like very bright colors. Red and yellow are the preferences of ordinary babies. The favorite color of boys is green, red, yellow, white, and black. The favorite colors of girls are green, red, white, yellow, and black. Adults are rich in life experience and cultural knowledge. In addition to the associations from life, there are more cultural factors. According to the color psychology of the consumer groups of different age groups, the PET bottle design can be targeted. According to the different perceptions of color by people of different ages, we have designed such PET bottles to provide us with a wider market.

The color design of China Pet Bottle has a great impact on their own development, and seizes market dynamics to win a wider space for their own development.

How To Design The Pet Preform Mold

Pet Preform are something we often see in our life. Let the blow-molded PET product factory tell us how to improve the quality of blow-molded pet bottle preforms.
First of all, the mold design should be reasonable and the best structural scheme should be selected as much as possible for manufacturing. Designers should fully consider the technical requirements of the mold and the feasibility and manufacturability of its structural design.  The design of the mould is the key link to improve the overall quality of the mould, which requires us to consider all aspects of influencing factors.  It mainly includes the selection of mold materials, the availability and safety of mold structures, the processing performance of mold parts and the convenience of mold maintenance.
At the stage of mold structure design, we should try our best to design the mold to be compact and easy to operate, and at the same time ensure that the mold parts have sufficient rigidity and strength.
Welcome to choose a professional China Pet Bottle design manufacturer-Jilian plastic mold. We are trustworthy and can provide you with many professional opinions and suggestions.  Please contact us if necessary, I believe we won’t let you down.