multi-functional Blow molding machine

1. Mold opening, mold clamping, thimble and other actions adopt high-precision screw nuts with a transmission accuracy of 0.01mm.

2. The linear guide rail transforms the traditional reciprocating sliding guide into a rolling guide, which improves the positioning accuracy, reduces the mechanical cost and greatly saves electricity, and can maintain high precision for a long time.

3. Adopt a new type of load cell to accurately control the back pressure to achieve stable precision injection.

4. The timing belt wheel and timing belt have simple structure, convenient installation, high transmission accuracy and low noise.

5. Centralized lubrication and volumetric proportional distributor are used to ensure sufficient lubrication at each point. Non-reverse ring (over apron)---As the name suggests, the role of the non-reverse ring is to prevent reverse. It is a part that prevents the plastic melt from leaking back during injection. Blow molding machine die head The die head is the transition part connecting the barrel and the mold. Air needle Air needle is the part that connects the die head and the barrel? It only plays a bulging role in the plastic blowing process.

Feeding hopper Feeding hopper is a component that stores plastic raw materials, and some add heating and blowing devices on the feeding hopper to make the dry hopper pneumatic blowing bottle electric control principle: Servo system: the output of the object's position, orientation, state, etc. An automatic control system capable of following any changes in the input target (or given value). The main task of the servo is to amplify, transform and adjust the power according to the requirements of the control command, so that the torque, speed and position output of the drive device are very flexible and convenient. Mode-locked servo motor The working principle of the servo motor: The servo motor is a typical closed-loop feedback system. The reduction gear set is driven by the motor. Its terminal (output end) drives a linear proportional potentiometer for position detection.

The potentiometer converts the corner coordinates A proportional voltage is fed back to the control circuit board. The control circuit board compares it with the input control pulse signal to generate correction pulses, and drives the motor to rotate in the forward or reverse direction, so that the output position of the gear set matches the expected value, so that the correction The pulse tends to be 0, so as to achieve the purpose of accurately positioning the servo motor. Servo motor control: The standard servo motor has three control lines: power, ground and control. The power line and the ground line are used to provide the energy required by the internal motor water bottle blowing machine and control circuit. The voltage is usually between 4V-6V.

The power supply should be isolated from the power supply of the processing system as much as possible (because the servo motor generates noise). Even a small servo motor will pull down the voltage of the amplifier under heavy load, so the power supply ratio of the whole system must be reasonable. Input a periodic positive pulse signal. The high level time of this periodic pulse signal is usually between 1ms-2ms, and the low level time should be between 5ms and 20ms.

With the continuous development of the domestic plastic bottle market, the blow molding machine industry has also emerged. In recent years, its applications in the food and pharmaceutical fields have become more and more extensive. Blow molding machine is a kind of equipment that makes plastic particles into hollow containers through blow molding process. At present, the more common models include one-time hollow extrusion blow molding machines that use PP and PE, and use PET, PC or PP to mold twice. The injection stretch blow molding machine, and the newly developed multi-layer hollow extrusion blow and stretch blow molding. At present, most of the blow molding machines are still two-step blow molding machines, that is, the plastic raw materials must be made into preforms before blowing. Nowadays, environmentally friendly plastics made of PET are commonly used.

Blow molding machine: After the liquid plastic is sprayed out, the wind blown by the machine is used to blow the plastic body to a certain shape of the cavity to make a product. This kind of machine is called a blow molding machine. It is also a kind of blow molding machine, namely hydraulic blow molding machine. The rapid development of the bottle blowing machine and its adoption in many industries is mainly due to its distinctive characteristics. First of all, the bottle blowing machine adopts oil-free air bag clamping technology, which has a large clamping force, and has less force in the toggle operation and long life. Secondly, the patented fly-out sealing technology makes sealing easier, especially for jars. In addition, the use of Keyence's PLC, touch screen, easier operation and high reliability. However, with the wide range of applications and increasing requirements, the pharmaceutical industry currently has two urgent needs for blowing equipment.

One is that because the price of plastic raw materials continues to rise, companies are always thinking about how to reduce packaging costs to maximize profits, so they need to use advanced blowing equipment to produce lighter bottles; the second is due to the rapid changes in the market. Beverage bottle blow molding machine manufacturer must respond flexibly to the shorter and shorter life cycles of medicines. These two urgent needs have created a big problem for blowing equipment suppliers. Therefore, in the subsequent development process, blowing machine companies must face these problems directly if they want to achieve long-term development. The industry must use its own advantages to seize the market, and then continuously strengthen technological innovation to stabilize the market.

The main features of the automatic high-speed bottle blowing machine: 1. High safety factor: no hidden danger of personal injury, avoiding the danger of semi-automatic manual bottle extraction, reducing the loss caused by accidents and improving production efficiency. 2. High-speed and high-efficiency: The main features of the new model are equivalent to the original four-automatic high-speed bottle-blowing machine: 　　 1. High safety factor: no hidden danger of personal injury, avoiding the danger of semi-automatic manual bottle collection and reducing the loss caused by accidents To improve production efficiency.　　 2. High speed and high efficiency: One new model is equivalent to the efficiency of the original four semi-automatic machines.　　 3. Labor saving: The machine can be operated by a single person or multiple machines at the same time, saving 4 to 6 times of labor.　　 4. Stable performance: It adopts imported touch screen man-machine interface computer, which has precise performance, fast speed and strong stability. The structure is simple, the oven is integrated with the slide way in the main body, and the maintenance is convenient.　　 5. Detection components, strong electric control use imported products, reliable performance and accurate response.　　 6. Adopt infrared lamp tube heating, strong penetration and uniform heating, the width and height of the reflector can be adjusted, which can be suitable for heating preforms of different structures.　　 7. Equipped with automatic alarm and automatic fault detection and judgment kinetic energy. At most time, 

8 Cavity high speed Plastic Bottle Making Machine can maker 9000-10000 bottle per hour.

The advantages and characteristics of the automatic design and application of the automatic bottle blowing machine: 1. Reasonable design and automatic control, which greatly reduces power consumption and manpower; 2. Automatic tube blanking system; 3. Infrared preheating and heating Box to preheat the tube blank; 4. The production process is all from the advantages and characteristics of the automatic design and application of the automatic blow molding machine: 　　 1. Reasonable design, fully automatic control, greatly reducing power consumption and manpower; 　　 2. Automatic Upper tube blank system; 　　 3. Infrared preheating heating box is used to preheat the tube blank; 　　 4. The production process is fully automated, which has the advantages of less investment, quick results, easy operation and maintenance, etc.　　Inaccurate temperature control or large temperature deviation, the installation position of the temperature measuring point (thermocouple) is unreasonable, which causes periodic deviation of temperature. As the temperature deviation increases, the deviation affecting the weight also increases. As the temperature rises, the extrusion barrel stretches more, and in the same operating cycle, the spout at the bottom of the bottle increases and the product weight decreases. When the temperature is low, the weight of the product increases. When the thermocouple is in poor contact, there is a similar failure. If the thermocouple is broken, the amount of extrusion decreases, and when it is below the melting point of the plastic, the motor current increases.

When operating the hollow blow molding machine for processing, we must pay attention to some temperature control to ensure that a suitable plastic bottle is manufactured.

1. Melting temperature TM: For crystalline polymers, it refers to the temperature at which the three-dimensional remote ordered state of the macromolecular chain structure changes into disordered viscous flow state, also known as melting point. It is the lower limit of the molding temperature of crystalline polymers.

2. Glass transition temperature TG: refers to the transition temperature of the amorphous polymer (including the non-crystalline part of the crystalline polymer) from the glass state to the highly elastic state or from the latter to the former. It is the lowest temperature for the free movement of the macromolecular segment of the amorphous polymer and the upper limit of the working temperature of the product.

3. No-flow temperature: the highest temperature at which no flow occurs under a certain pressure. The automatic bottle blowing machine is to add a certain amount of plastic to the barrel at the upper end of the die of the capillary rheometer and heat it to a certain temperature. After the constant temperature is known to be 10MIN, apply a constant pressure of 50MPA. If the material does not flow out of the die, unload After pressing, the temperature of the material is increased by 10 degrees. After holding it for 10 min, a constant pressure of the same size is applied. This continues until the melt flows out of the die. This temperature is reduced by 10 degrees to the non-flow temperature of the material.

4. Flow temperature TF: refers to the temperature at which an amorphous polymer changes from a highly elastic state to a viscous state. It is the lower limit of the processing temperature of amorphous plastics.

V. Decomposition temperature TD: when the temperature of the polymer in the viscous flow state is further increased, the degradation of the molecular chain will increase, and the temperature when the polymer molecular chain is significantly degraded is the decomposition temperature.

The above five points are our summary of how to pay attention to the temperature of the hollow blow molding machine in production, but in general it is not just these five points, which requires us to constantly sum up experience in our daily work to find out that its problems exist .

What are the influencing factors of the blow molding process of the blow molding machine?

What are the influencing factors of the blow molding process?

1. Blowing pressure

The compressed air in blow molding has two functions, inflation and cooling. Low viscosity, low volume or thick wall parts should use low air pressure; high viscosity, large volume or thin wall parts should use higher pressure.

2. Blowing speed

In order to shorten the blowing time, in order to facilitate the product to obtain a more uniform thickness and a better surface, the inflation speed should be as large as possible, but the speed is too fast to easily produce the following phenomena: ① cause a vacuum at the air, causing this part of the parison to sink in However, when the parison is completely inflated, the diaphragm part will form a diaphragm; ② The parison of the die part may be pulled off by the fast air flow.

3. Blow-up ratio

is usually controlled at 2-4 times, if the inflation ratio is too large, the shape stability of the product is poor, and if it is too small, it will cause uneven wall thickness.

4. Mold temperature and cooling time

If the mold temperature is too low, the plasticity of the plastic at the jaws will be reduced, it is not easy to swell, and the part will be thickened, which is difficult to form; the mold temperature is too high, the cooling time will be extended, and the production cycle will be long. If the cooling time is too short, the cooling will not It is easy to cause deformation of the product, shrinkage increases, and the surface is dull.

5. Molding cycle

Including the process of extruding the parison, intercepting the parison, closing the mold, blowing, cooling, deflating, opening the mold, taking out the product and other processes. The principle of the selection of the molding cycle is to shorten as much as possible on the premise of ensuring that the product can be shaped.

Plastic blow molding machine should pay attention to processing control temperature in operation

PET stretch blow molding machine should pay attention to the processing control temperature during operation

1. Melting temperature TM: For crystalline polymers, it refers to the temperature at which the three-dimensional remote ordered state of the macromolecular chain structure changes into disordered viscous flow state, also known as melting point. It is the lower limit of crystalline polymer molding processing temperature.

Second, the glass transition temperature TG: refers to the transition temperature of the amorphous polymer (including the non-crystalline part of the crystalline polymer) from the glass state to the highly elastic state or from the latter to the former. It is the low temperature of the free movement of the macromolecular segment of the amorphous polymer, and also the upper limit of the working temperature of the product.

3. No-flow temperature: the high temperature at which no flow occurs under pressure. Full-automatic bottle blowing machine is to add the amount of plastic into the barrel at the upper end of the die of the capillary rheometer and heat it to a certain temperature. After the new 10MIN is known, apply a constant pressure of 50MPA. If the material does not flow out of the die, release the pressure Then increase the temperature of the material by 10 degrees. After holding it for 10 min, apply a constant pressure of the same size. Continue until the melt flows out of the die. Decrease the temperature by 10 degrees. This is the non-flow temperature of the material.

4. Flow temperature TF: refers to the temperature at which an amorphous polymer changes from a highly elastic state to a viscous state. It is the lower limit of the processing temperature of amorphous plastics.

V. Decomposition temperature TD: When the temperature of the polymer in the viscous flow state is further increased, the degradation of the molecular chain will increase, and the temperature when the polymer molecular chain is significantly degraded is the decomposition temperature.