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| About Us |
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 SHANGHAI ZHANHONG MACHINERY PLASTIC CO., LTD. is set up in 1986,covers an area of more than 20,000 square meters,including building area of more than 14,000 square meters with fixed assets 86million RMB and yearly value of output 100million RMB.Our company is specialized in manufactring Packaging Machine.such as Plastic Sheet Extrsion line、Thermoforming Machine、Paper Cup Machine、 lid printing machine、Cup Printing Machine and Machining Centers,With a batch of semi-senior and senior technical experts,our company has obtained ISO9001 Quality System Cerificate,and CE Certificate which combined design、development、manufacture、installation and service in to system. We always abide by the purpose that"Quality is permanent topic,customer is eternal center,competition is motive power,brand is honghua's pursuit",The products are sold to over 30 countries，such as Western European、Middle East,Eastern and Southern Asia, the products also be highly praised and appreciated by consuming public.
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| Technical information |
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Heat Transfer Modes-Step Change in Surface Temperature
Consider contact or trapped sheet forming．When the sheet is placed against the isothermal hot plate．its
surface temperature immediately increases to the plate temperature ．As time increases，energy is conducted
to the interior of the sheet． If the sheet is held against the hot surface long enough,the sheet temperature will
eventually equal the hot surface temperature everywhere throughout the sheet．If the sheet is heated on both sides as
shown ,the temperature profile through the sheet will be symmetric about the centerline．
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Methods of Forming --One-Step forming
In its simplest form ,thermoforming is the stretching of a heated rubbery sheet into a final shape. As the sheet is
stretched against the mold surface, it stops drawing. As a result , the final part has thick walls where the sheet
touched the mold first and thin walls where it touched last. In many thin-gage forming applications, the extent of
sheet thatis stretching is small and so the areal draw ratio is small. The package integrity and durability are
therefore uncompromised. Typical applications are in packaging areas such as blister and bubble packs, form/fill/seal
packages and fast foodcontainers and picnic plates. If a high degree of stretching is needs, as with disposable drink
cups or for heavy gage sheet forming, simple stretching techniques are insufficient.. The methods of forming are divided
into the number of sequential steps needed to form the part once the forming temperature.
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GENERAL DESCRIPTION
The Key Cup is an automatic machine with a high production capacity for printing with the dry-offset system up to 7 colours on plastic items with the shape of a truncated cone.
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