● Thick plastic principle:
Similar thick plastic and foil blister principle is to locate a good sheet through an oven heated to soften the state , and its surrounding plastic mold and then form a sealed cavity air space will instantly take away the overlying plate firmly affixed mold surface , cooling stereotypes process obtained products .
● Organization and functions:
Thick plastic sheet machine generally consists of positioning systems, plastic mold positioning systems, frame systems , heating systems, cooling systems and electrical control system.
( 1 ) Plate positioning system generally consists of tic-tac- profile binder box , power cylinder or cylinders and balancing synchronization mechanism. Play its role on the plastic sheet to intensify positioning. Walking frame heating of the upper and lower binder frame structure , and add a transverse locking mechanism to ensure that the binder frame with sheet metal plate abutting seal. Framework can be adjusted according to the corresponding mold size , manual and automatic adjustment ;
( 2 ) Plastic mold positioning system generally consists of upper and lower die sets, upper and lower mold cylinder or cylinders and synchronization mechanism. Its role is to play a stepping plastic mold positioning , and mold and vacuum pipe connections. Tighten the screws positioned manually or pneumatic automatic locking in two ways. Synchronization mechanism ensures synchronous lifting the upper and lower mold , plastic molding to ensure accuracy ;
( 3 ) The general framework of the system from the rack sections , sealed box , protective gates . Protective door automatic and manual points ;
( 4 ) Heating by the heating system is generally brick or heating pipe, and a power cylinder body of the oven rack or the electrical components ;
( 5 ) From the gas cooling system in general , the composition of the water pipe and the spray head ;
( 6 ) Electrical system and electrical control system with pneumatic or hydraulic system management can be realized blister machine process requirements (temperature , speed, time ) and various operation programs . Mainly by the PLC and touch screen, touch , electronic components , instrumentation thermostat , solenoid valves , sensors and other components . Usually there are three control modes , manual and automatic adjustment .
Plastic molding is a cyclic process , with each cycle including : Feeding - heated to soften - Blowback pretensioners - Blister - cooling stereotypes - Stripping pickup. Remove the plastic sheet and then placed again ( to receive or automatic ) , the next cycle.
1, According to the position of molding station and unloading station points :
2 , by forming area of :
( 1 ) Small thick plastic machine, forming an area of around 1500MMX1000MM less
( 2 ) Medium- thick plastic machine, forming an area of ??less 1500MMX1000MM to 2500X1500
( 3 ) Large thick plastic machine, forming an area of ??more than 2500X1500
● Usage Status :
Thick plastic molding machine with energy large size, relatively simple shape , size requirements inaccurate plastic products, can replace certain aspects of injection molding , glass, steel , metal , etc. , plastic mold with low manufacturing costs , shorter development cycles advantages. Injection mold cost is 1/10 to 1/20 , and the rapid production cycle . Are increasingly widely used in automotive interior and exterior trim , transportation, building materials, packaging , medical equipment , household appliances, sanitary ware culture and education , sports and other fields of daily life . In the rapid development of the plastics industry today , thick plastic use has been expanding its position in plastic machinery has become even more important and difficult to meet the needs of users . Currently , most of the thick plastic Users mostly imported machinery and Taiwan . Its energy-saving , productivity, highly thick plastic to become the bottleneck of the development of thick plastic machinery . At present, Taiwan's machinery can replace the thick plastic machinery manufacturer few. Such as energy efficiency, Pudi Machinery Co., Ltd. , Dongguan City, produced thick plastic machine uses a new energy-saving radiator , can save more than 30 % of the electricity , the company produced positive thick slices thermoforming machine is suitable for more difficult the PC thick plastic . Another example is the SME Innovation Fund website provides Jiangxi heating million contained Pioneer Machinery production synchronous thick plastic molding machine solves the thick film heating, forming a continuous production process problems, production efficiency is an ordinary thick plastic machine 2 times.
Thick plastic machine plastic machinery in China is only a small branch of a larger gap between the industrialized countries and their levels . In a large variety of special , dedicated most style thick plastic machine areas , some products still blank, which is a major gap between the industrialized countries .
● selection of models and molds :
Generally, customers engaged in the plastic industry for many years tended to have the ability to judge and choose the right plastic machine to produce. But for the most number of clients to assist in the vendor may need to decide which one presses specifications thick slices , and even customers may be product samples or idea , and then ask whether the machine manufacturer can produce , or what kind of model comparison fit.
Usually an important factor in the decision to choose including mold , products, plastic type and production requirements , therefore , must be collected before making a selection or have the following information :
Product dimensions ( length , width, height ) ; wall thickness of the product ; using the type and quantity of the product ;
After obtaining the above information , you can follow these steps to choose the right thick plastic machine :
1, the product of the maximum dimensions determine the wellhead size of the machine, in the molding area of ??15,000 square meters thick film made ??of small machines , in 1.5 to 3.7 square meters thick slices machine type is selected , the 3.7 square meters or more will have to use a large thick slices machine , classification models described above .
2 , such as the wall thickness of the product between the 1.5-2MM , stretching product ratio ( height / length + width ratio of the average size ) in the context of greater than 1 , should use double- heated models, such as less than 1 , the selection of single- heating models.
If the product wall thickness 1.5MM less , no matter how big draw ratio , ( of course stretching over more than 150 articles on the blister should not do ) then you can choose single- heated models .
If the product wall thickness 2MM above , draw ratio of 0.5 or less should use single- heating models, stretching over more than 0.5 advised to use double- heating models.
3, the choice of words based on the type and quantity of products, such as relatively simple products made in larger quantities , the annual output of 6-8 million more than the optional duplex or multi -station models, such as synchronous blister thermoforming machine , and optional aluminum mold plastic mold is appropriate ; such product specifications are more less a single number , the selection of appropriate single station , a control unit and a choice of heating , pressure plate material box and can care adjusted to facilitate retooling models as well, mostly plastic resin or bakelite mold making appropriate.