High Efficiency Auto Plastic Blow Molding Machine 14000bph-8800bph For Energy

 

Introduction of R series machine

 

I. Summary

 

R series linear full electric PET bottle blow molding machine is a high speed automatic PET blower designed and developed

 

with the most advanced bottle blowing technology at present, the advantages of which can be described as speedy, stable,

 

simple, general purposed and environmental safe. It is mainly applicable in blow molding PET containers for water, beverage,

 

juice, etc. The machine yields abundantly with high efficiency. The capacity of each cavity has been increased to 2600bph when

 

the bottle size is equal to or less than 600ml bottle respectively, which can meet the high-end customer's requirements.

 

Equipped with preform auto loading system, the machine works fully automatically with consistent performance and high speed,

 

without any operator's interference during the whole processes. Accordingly, chance of contamination can be reduced

 

manifestly, which assures the quality of products.

 

II. Machine Performance and Characteristics

 

Application of servo PLC system:

 

Adopted Omron motion controller system (integration module type), using the PTO (servo positioning module) system for high-

 

speed positioning, proximity sensors search the orbital target location, sending high-speed signals to the servo system. The

 

position of the track is detected online by the high precision rotary encoder which built-in the servo motor, sending back

 

informations to the control system, finally, high-speed positioning is done by positioning module.

 

Application of the servo motor

 

The mould movement mechanism: Adopted the servo motor connect the gear box, synchronical transmission system is

 

adopted to fulfill the reciprocating up and down motion of the two hinge mechanisms on both sides of the mold hauled by two

 

linkage rods respectively. In this way, the two mold holding plates in the middle move oppositely or towards each other, which is

 

generally known as mold opening and closing. The hauling wheel driven by the servo motor makes clockwise rounds

 

continuously, reducing the power impact and the wearing, makes the mould clamping more smoothly. Each round leads to a

 

complete cycle of mold holding plates movement------open and close. Also the high pressure air supercharged mold locking

 

mechanism is applied which buffs the impact between mold plates and effectively protects molds. Besides, it does help to

 

reduce the visibility of parting lines on finished bottles. The servo motor driven mold movement mechanism is designed and

 

created upon rigid engineering simulation analysis, which ensures that the series of the mould motions are simple, accurate,

 

consistent and speedy, making cycle time 0.2~0.4 seconds.

 

★8 pcs of superhard alloy guide rails are selected to carry the two movable mould plates (Other linear blowing machine

 

manufacturers in domestic all use 4 pcs). The weight of the movable mould plates is divided to the two rails at one size, the

 

stress is half of other design machine from other manufacturers. Moreover, the two guides are fastened to each other, making

 

them more resistant to wear and more accurate in positioning. The weighs of movable mould plate is about 350kg,but in the

 

absence of external forces, the moving template can be pushed by a single finger (the equipment moves more efficiently).In

 

addition, the servo motor and gear box always move in the same direction in the process of opening and closing (other

 

manufacturers in domestic, their machine is adopted the forward and reverse rotation 180 degrees to achieve the mould

 

opening and closing) to ensure the longer service life of the servo motor and gear box.

 

The preform feeding and preform heating holders transfer mechanism: The preform feeding star wheel and preform heating

 

holders transfer mechanism are driven by the servo motor synchronous belt linkage type drive step. For preform rotary heating

 

system, the preform heating holders is controlled by variable frequency motor, preforms (preform neck is upwards) are 360

 

degree uninterruptedly rotary heating,38mm Preform heating pitch, more preforms are uninterruptedly heated within the same

 

distance, which improves the efficiency and energy saving above 50%. The same servo motor is used to synchronously operate

 

on a slide track for rotating high-speed stepping positioning to simplify the structure, which makes the stepping track speedy

 

and stable, shorten the production cycle time and greatly improve the production efficiency.

 

The perform after heated / variable pitch mechanism: This mechanisam is adopted the servo motor to connect the screw

 

directly, the screw turns a round, the pitch was changed from 38mm to 96mm directly, which ensures high speed and accurate

 

perform handling between the two mechanism.

 

★The variable pitch part adopts the super-hard alloy screw with completely independent research and development, the

 

surface 2mm Rockwell hardness can reach more than 68 degrees, and the screw smooth degree and wear-resisting degree

 

are absolutely leading in the industry, and the design service life of the screw can reach more than 15 years.

 

Preform transfer system with the grippers and bottle out-feed mechanism: Heated preforms feed into the blow mould

 

and the finished bottles feed-out driven by the same servo motor & the synchronous belt, to ensure the high speed and

 

accurate for these two motions.

 

The stretching mechanism (down stretching): the stretching rods are driven by a servo motor all at once, which ensures the

 

synchronicity of the motion of the rods and makes it easier to do adjustment prior to production. (After interchanging the blow

 

mould, makes it much easier to adjust the height of stretching rods, just need to input the datas on the touch screen, instead of

 

doing the adjustment by manual.)

 

Application of thermostatic heating system

 

The modularized control system is used in the thermostatic flask blank heating oven, which use infrared lamps and reflector for

 

heating preform. After setting the temperature value, the equipment can automatically adjust the output voltage according to the

 

rate without being affected by voltage fluctuation and environmental temperature change. At the same time, it is also cooled by

 

circulating air controlled by frequency converter, which can effectively guarantee the internal heating temperature and constant

 

temperature of the heating ovens, and make the surface of each preform and its internal temperature uniformly heated.

 

Moreover, the bottle rotates 360 degrees in the heating ovens, so that each side of the preform can be heated evenly, which

 

improves the yield of blown bottle and the adaptability range of the thick-walled preforms.

 

The application of the full closed-loop voltage regulator in preform heating system:

 

The temperature of the heating ovens are controlled by the full closed-loop voltage regulator (with feedback) which

 

independently developed by RiBo company. The controller detects and adjusts the output voltage (set value) at the scanning

 

frequency of 100 times per second (Ensure the voltage stability accuracy of ±0.5V), so as to achieve the effect of evenly voltage

 

output and solve the problem of unstable heating effect caused by the heat fluctuation of heating element (lamps) due to the

 

voltage fluctuation of the power supply. In addition, the closed-loop control system interacts and cooperates with the original

 

heating ovens’ constant temperature control system, greatly improving the heating temperature fluctuation caused by

 

environmental temperature change. By application of the above technology in the bottle blowing machine, the heating

 

uniformity and stability of each preform tend to be completely consistent, which finally ensures the stability and uniformity of the

 

bottle blowing effect of each cavity. This closed-loop unit has further improved the overall performance of the bottle blowing

 

equipment.

 

The machine is equipped with the preform temperature detection at the end of the last heating oven, if the preform temperature

 

does not reach the blowing temperature, the preforms going into the blow mould but no blowing, saving the air.

 

III. Performance and Advantages

 

i.The man-machine interface is easy to operate. Everything is computerized, including temperature adjustment and preform

 

distribution.

 

ii.Independent movable operation pannel, make the operation more convenient and flexible.

 

iii.Preform unscrambling, loading, bottle handling and ordering are all operated by stainless steel manipulator automatically

 

without a second contamination.

 

★It is also equipped with a preform drop recovery device (the dropped preform is recovered into the preform hopper) and an

 

additional buffer device to prevent damage caused by knocking the preform when falling down.

 

iv.During the process of the automatic embryo preform feeding system, each preform channel has photoelectric detection,

 

control the action of the upper motor and the parting cylinder, ensure the uniform distribution of the preform in each embryo

 

channel, and have the function of alarming the material shortage.

 

v. The circulating chilling water system as well as the fan with converter controlled can protect the bottle neck against

 

deformation when the preform is being heated.

 

vi. The homothermal heater adopts auto reflection and closed loop adjusting system which have the power supplied constantly

 

in proportion, not affected by the fluctuation of voltage. The conveying chain is short pitched and paratactic, which helps to

 

realize slow heating and low power consumption. As a result, the preform can be heated evenly and easy to blow.

 

vii. The positioned installation of molds makes it possible to change molds easily within one hour,the operator only need to

 

stand on the ground can finish this job, no need to stand on the machine frame,the safety for person is much higher.

 

viii. All the critical parts we use for the machines, such as the electrical, pneumatic components, servo motor, etc, are famous

 

branded parts imported from Japan, USA and Europe,which ensures the stability and long life of our equipments.

 

ix.The high pressure blowing valve is equipped with the device of converting to low pressure air, which can ensure the normal

 

conversion without low pressure air. Machine is equipped with the high pressure air recovery device, in the process of bottle

 

blowing production, the high pressure air can be recoveried and used for the cylinders/ pre-blow.

 

IV. Easy Maintenance

 

Omron servo controller system (motion controller, modular) is connected with the machine via particular communicating

 

cables.The user can manage all the actions of the machine through the motion controller. Once the machine has a fault, the

 

man-machine interface will provide warning signals and fault diagnosis report to the operator, the operator can quickly find the

 

cause of the fault and troubleshoot as soon as possible through the fault display.

 

★ If the bottle is blocked/full in the air conveyor, the function of automatic stop feeding preforms can be set in the program

 

through photoelectric detection.

 

★ If the after packing machine(such as the filling machine, the labling machine,ect) stops running for long time, the heating

 

lamp can be set with the function of automatically reducing temperature, saving electricity consumption and avoid the excessive

 

heat in the preform heating ovens and the preform holders.(Heating temperature can be adjusted on the touch screen)

 

★The transition part between the last preform heating oven and the variable pitch system is equipped with photoelectric

 

detection and protection device. When the preform transfer is not in place, the bottle blowing machine will stop automatically,

 

effectively protecting the components of the variable pitch system.

 

★The key parts of the machine are equipped with centralized automatic lubricating.

 

V. Safety

 

The reciprocating parts of the bottle blowing machine are equipped with protective devices and warning signs.

 

i. The safety of operators

 

The machine is totally enclosed with perfect reliable safety door and also equipped with aluminum antislip plate on the principal

 

surface, which can assure operators' safety to the largest degree.

 

ii. The safety of the machine

 

The multiple points detection technique is adopted to ensure the safe running of the positioning system, the clamping system

 

and the stretching system to the largest degree.