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The history of blow molding

Also known as blow molding, a rapidly developing plastic processing method. The blow molding process began to be used to produce low density polyethylene vials during World War II. In the late 1950s, with the birth of high-density polyethylene and the development of blow molding machines, blow molding technology was widely used. The volume of hollow containers can reach thousands of liters, and some production has adopted computer control. Plastics suitable for blow molding include polyethylene, polyvinyl chloride, polypropylene, polyester, etc., and the obtained hollow containers are widely used as industrial packaging containers. According to the method of making the parison, blow molding can be divided into extrusion blow molding and injection blow molding. The newly developed ones include multi-layer blow molding and stretch blow molding.

The hollow plastic products produced by the injection blowing process have the following advantages compared with the hollow plastic products produced by the extrusion process:

1 Plastic bottles are formed from raw materials to finished products at one time, with a high degree of automation, no need for manual secondary processing, labor saving, and hygienic, in line with the GMP requirements of pharmaceutical packaging, especially suitable for the production of medicine bottles.

2 The appearance of the product is beautiful, the size of the bottle mouth is accurate, and the weight of the plastic bottle is stable.

3 The plastic products are made by blow molding of injection molds at one time, and there is no waste at the bottle mouth and bottom of the bottle, and the bottle mouth is flat and has good sealing performance.

4 It is suitable for producing high-grade and exquisite plastic hollow products, such as cosmetic bottles, baby bottles, space cups, lamp balls, etc.

Looking for blow molding machine supplier?

We are not only a machine manufacturer, we can also supply turnkey project according to customers’ request, including workshop design, machine layout design, water, gas, electic cable layout design, label and bottle design. Our mission is to ensure customers’ plant properly working and help customers win their market.

Our main products including: water treatment system, mineral water filling machine, labeling machine, packing machine, CSD production line, juice production line, 5 gallon water production line, PET bottle blowing machine, injection molding machine and so on.

If you have any needs, please do not hesitate to contact us！

Which is labeling machine?

Labeling machines are machines that dispense, apply or print-and-apply labels to various items, products, containers, or packages. The types of machines that do these operations vary from completely automatic print and apply high production units to simple manual dispensing devices.

Working process of labeling machine

The working process of the labeling machine begins with the object being fed on the conveyor belt at a constant speed to the labeling machine. The mechanical fixing device separates the attached objects by a fixed distance and pushes the objects along the direction of the conveyor belt. The mechanical system of the labeling machine includes a drive wheel, a labeling wheel, and a reel. The drive wheel intermittently drags the label tape to move, the label tape is pulled out from the reel, and at the same time passes through the labeling wheel The labeling wheel will press the label tape on the object. An open-loop displacement control is used on the reel to maintain the tension of the label tape. Because the labels are closely connected to each other on the label tape, the label tape must be constantly started and stopped.

The label is applied to the object with the applicator wheel moving at the same speed as the object. When the conveyor belt reaches a certain position, the label belt drive wheel will accelerate to a speed matching the conveyor belt, and after the label is attached, it will decelerate to a stop.

Since the label tape may slip, it has a registration mark on it to ensure that each label is placed correctly. The registration mark is read by a sensor, and during the tape deceleration phase, the drive wheels are repositioned to correct any mispositioning on the tape.

Looking for labeling machine supplier?

We are not only a machine manufacturer, we can also supply turnkey project according to customers’ request, including workshop design, machine layout design, water, gas, electic cable layout design, label and bottle design. Our mission is to ensure customers’ plant properly working and help customers win their market.

Our main products including: water treatment system, mineral water filling machine, labeling machine, packing machine, CSD production line, juice production line, 5 gallon water production line, PET bottle blowing machine, injection molding machine and so on.

If you have any needs, please do not hesitate to contact us！

Labeler is a device that sticks rolls of self-adhesive paper labels (paper or metal foil) on PCBs, products or prescribed packaging. Labeling machines are an integral part of modern packaging.

The product type is divided into linear labeling machine and rotary labeling machine.

1. According to different adhesive coating methods, it can be divided into self-adhesive labeling machine, paste labeling machine (paste labeling machine, glue labeling machine) and hot melt adhesive labeling machine.

2. According to the degree of automation, it can be divided into automatic,semi-automatic and manual labeling machines.

3. According to the realization of different labeling functions, it can be divided into plane labeling machine, side labeling machine and circular labeling machine.

4. Labeling machines mainly include: self-adhesive labeling machine, sleeve labeling machine, round bottle labeling machine, beer labeling machine, semi-automatic labeling machine, automatic labeling machine, automatic labeling machine, automatic labeling machine, thermal labeling machine Melt glue labeling machine. These products can complete flat sticking, single- or multi-sided sticking of packaging, cylindrical sticking, partial or full-covering cylindrical sticking, concave and corner sticking, etc.

What roles do labeling machines need to perform in so many industries?

1. Pharmaceutical industry. The pharmaceutical industry has very high requirements on the speed of labeling machines, so the application of automatic labeling machines is very extensive. At the same time, the requirements for the design of labeling machines should also take into account the integration of pre- and post-labeling processes and automatic bottle feeding after labeling.

2. Daily chemical industry. The requirement of the daily chemical industry for the labeling machine is to adapt to the change of containers, to be able to achieve the precision control of the soft-body plastic container and the labeling, the daily chemical industry is a very big challenge for the labeling machine.

3. Beverage industry. The application in the beverage industry requires high speed and accurate positioning, and there are often multiple labels per bottle. In addition, the shape and material of the label are often changed, and the position control skills are highly required during labeling. Therefore, the labeling machine must continue to innovate and reform to meet the labeling requirements of the beverage industry.

4. Electronics industry. The electronic industry has very professional requirements for the application of labels. In addition to the particularity of label materials, the labeling machine also requires extremely high precision. In cooperation with other production links, it can print and paste a large amount of data in real time, and can be compatible with the data of the main system.

5. Battery industry. The battery manufacturing industry has widely used automatic labeling machines for roll-to-roll shrink labels. A well-designed labeling machine can ensure that the interface of the label is flat while operating at high speed, taking into account the prevention of short circuit, and at the same time providing the function of label shrinkage.

6. Petrochemical industry. The petrochemical industry often needs to stick product labels on large barrels, large bottles and other containers, and the required speed and accuracy are relatively loose, but due to the large labels, the power requirements of the labeling machine are higher, and large-area labels are attached to the curved surface, or when labeling the line with uneven speed, keeping the label to indicate that flatness is also a concern of the designer.

For more information about labeling machine, please do not hesitate to contact Us. 

The injection molding equipment is used to heat and melt hot melt and thermosetting plastics, apply a certain pressure to fill them into the mold, and then solidify into a mold after cooling. Today, let’s not talk about the working principle of the injection molding machine, but mainly talk about the advantages and disadvantages of the injection molding process.

Advantages of the injection molding process

1. The wall thickness distribution of the parison can be precisely controlled by the injection mold, so that the wall thickness of the obtained container is relatively uniform, avoiding the thinning phenomenon that is easy to occur in the corners of general blow-molded products, and the weight of the product can be controlled at + 0.1g, the precision of the thread can be controlled within the range of soil 100μM, the size of the mouth is accurate, and the forming precision of thin neck products is high;

2. The obtained product does not need to be processed for E times, without seams, saving the finishing time of the product;

3. The parisons made by injection can all enter the blow mold for inflation molding, and no waste is generated during the processing, which reduces the waste of molding materials;

4. Products with smooth surface can be obtained, without scratches, and the surface characters and patterns are clear;

5. Small batch production can be carried out economically;

6. Wide range of application to plastic varieties;

7. High degree of automation, multi-mode production, and high production efficiency.

Disadvantages of the injection molding process

1. Two sets of molds for injection molding and blow molding and a hollow core mold with a valve must be used for product molding, and the mold for injection parison should be able to withstand high pressure, and the cost of molding equipment is high;

2. The temperature of the injection parison is relatively high, which requires a long cooling and setting time after inflation in the injection mold, which prolongs the entire molding cycle of the product and affects the production efficiency;

3. The internal stress of the injection molding parison is large, and it is easy to be unevenly cooled in the process of changing the mold. When producing products with complex shapes and large sizes, stress cracking is prone to occur. Therefore, the shape and size of the products are limited and are only suitable for production. Small products are used in cosmetics, daily necessities and pharmaceutical packaging, food packaging and other fields;

4. The operator’s are required to have higher operating skills.

Are you searching for injection molding machine?

Our main products including: water treatment system, mineral water filling machine, labeling machine, packing machine, CSD production line, juice production line, 5 gallon water production line, PET bottle blowing machine, injection molding machine and so on.

For more information about injection molding machine or injection molding process, please do not hesitate to contact us. 

The biggest feature of the PET blow molding machine is that the drying tunnel and the blowing machine are separated, which speeds up the blowing speed and increases the output.

A bottle blowing machine is a machine that can blow the finished preforms into bottles through certain technological means.

The PET multifunctional plastic blow molding machine is divided into two major control systems. Customers can choose freely according to their requirements, and can control technical parameters more accurately. The machine is simple and safe to operate, and adopts double emergency stop control at different positions and single point at different positions. It is controlled by the activation button and the double jog start button, which makes the operator convenient at work. The machine only needs one person to operate, and no special training is required. There is a special high and low pressure air storage device inside the machine, and the user can supply air from a single air source. Or double air source can supply more air, the clamping device adopts double crank clamping, which has the advantages of large clamping force, etc., the machine installation is very simple, and the operator is easy to operate and maintain.

Product Functions:

Suitable for blowing carbonated beverage bottles, mineral water bottles, cosmetic bottles, oil bottles, space cups, medicine bottles and other plastic hollow containers.

The infrared multi-function plastic preform heater is powered by three-phase four-wire 380V power supply (220V power supply can also be used). The machine is divided into seven layers of heating lamps and four heating zones. The heating time generally takes about 5-8 minutes. The temperature is transferred from the thermocouple to the temperature controller for automatic temperature control, so that the temperature in the heating box can be controlled smoothly, the infrared penetration is strong, the heating is even, fast and reliable, and the preform is guaranteed to obtain the best heating effect, the preforms are placed in a circular heating cycle for production, and the specific temperature is adjusted according to the needs of bottle forming.

Product Features:

The drying tunnel and the blowing platform are separated, which shortens the mold opening time, improves the blowing speed and increases the output.

· The compact design saves space, reduces investment costs and improves competitiveness.

· Automatic conveying system.

· Advanced PLC control system, light and simple control panel.

· Independent and simple linear motion system.

· Unique heating system, accurate temperature control and easy adjustment.

· Unique air storage device.

· The cooling system can achieve the ideal cooling effect.

· Every action is driven by the cylinder instead of the oil pump, so there is no pollution.

For more information about PET blow molding machine, please contact us immediately.