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imagination is everything
It's a preview of future life
is your multidimensional competitiveness
01
01Focus on the present
Focus on the presentflexibility and adaptability
flexibility and adaptability2021 may also be an unusual continuation
Pandemic hits economic downturn, many uncertainties
The current predicament makes it easy to worry about the future
It is also easy to forget that the future is an extension of the present
If you want to turn a crisis into a safe place, you must focus on the present
Maintain the vitality and resilience of enterprise innovation
to develop product flexibility and adaptability
Recently, a number of CPP cast film (3-layer in-mold co-extrusion combined with 27-layer co-extrusion distributor) production lines with a width of 4600MM and 5 extruders produced by Shanghai Dahui Plastic Industry Co.
, Ltd.
were tested in Huzhou, Zhejiang.
The success of the machine has opened up the development space of ultra-wide and ultra-multi-layer cast film products, which have unexpected flexibility and adaptability, and can be expected to be competitive
.
02
02product upgrade
product upgradeAdvantage empowerment
Advantage empowermentWith the implementation of the plastic restriction order
Challenge the traditional low-profile craftsmanship
Thin film upgrade is inevitable
Compounding of high functional levels
Environmentally friendly and degradable
According to the needs of the future market, Jingcheng technical team and customers have discussed the process upgrade after more than half a year of running-in.
Compared with the traditional CPP cast film production line, it has excellent performance in film thickness, product performance and production capacity.
At present, it belongs to China in the CPP industry.
First
.
3-layer in-mold co-extrusion combined with 27-layer co-extrusion distributor
● The output of special functional film is 1-1.
5 tons/hour
● The thickness of functional products is 0.
015MM--0.
1MM
● Good weather resistance/sealing/transparency/opening/gloss
●03
03craft difficulty
craft difficultyorder of magnitude
order of magnitudeeveryday visible cake
Pastry chefs need harmony
Millimeter-scale film 27 layers+
Process design to production capacity realization
Difficulty increases with each additional layer
The world's first 2.
5D multi-layer co-extrusion analysis system, multi-dimensional verification of precision operations, designers through complex information integration, through different arrangements and combinations, superimposed the possibility of innovation
.
04
04Analysis process
Analysis processTechnical dry goods
Technical dry goodsThe analysis of multi-layer in-mold co-extrusion dies has always been a big problem.
The traditional 3D analysis method is suitable for models with small mesh volume, but for models with wide width and many narrow slits, the division of The grid data will be very large, coupled with the multi-layer co-extrusion analysis, such a calculation amount is basically impossible for a computer, and even a workstation takes a long time to calculate the result
.
The new 2.
5D multi-layer analysis algorithm we adopted breaks through the limitations of traditional analysis software, and can directly and accurately calculate the die head of the wide-width multi-layer co-extrusion film series, and obtain the real result data more efficiently
.
1.
Raw material rheological data
Raw material rheological data 1.
Raw material rheological data
●CPP heat sealing layer CPP core layer CPP corona layer
● Detection temperature: 230-240-250℃
●● Graph of the relationship between shear viscosity and shear rate
●2.
Simulation analysis of raw materials
Simulation and analysis of raw materials 2.
Simulation and analysis of raw materials
Die head parameters: width 4600MM, product thickness 0.
02-0.
15mm, die lip opening 1.
2mm, total output 1500kg/h
.
Die head parameters: width 4600MM, product thickness 0.
CPP heat sealing layer--230℃--250kg/h
CPP core layer--230℃--1000kg/h
CPP core layer--230℃--1000kg/hCPP corona layer--230℃--250kg/h
CPP corona layer--230℃--250kg/hThe cavity pressure distribution is shown in the figure below
The cavity pressure distribution is shown in the figure belowThe temperature distribution of the mold cavity is as follows
The temperature distribution of the mold cavity is as followsThe viscosity change of each layer of raw material in each area of the mold body
The viscosity change of each layer of raw material in each area of the mold bodyThe thickness of each layer at the exit of the final die lip
The thickness of each layer at the exit of the final die lipUnder the current conditions, the total opening is 1.
2mm, the heat sealing layer is 0.
22mm, the core layer is 0.
76mm, and the corona layer is 0.
22mm.
The ratio of each layer is about 1:3.
5:1.
The layer ratio of the final product can be controlled by adjusting the output of each layer
.
3.
Main structure of die head
Main structure of die head
The above analysis results are under the condition of constant temperature, which is also our most ideal state.
Only by uniformly controlling the temperature of each area of the mold body can the quality of the product be guaranteed.
The arrangement of the heating rods and the design of the temperature area are also very important for the die head.
part
.
Schematic diagram of the internal structure of the die
Since the temperature of the raw materials used in the production of this set of die heads is basically the same, the structure adopted has no special heat insulation design (to meet the temperature difference of each layer in the range of 10-20 °C), and the upper and lower parts of the die body are divided into 23 temperature zones.
Each temperature zone of the laminar flow channel can be independently controlled and adjusted
.
4.
Core layer 27-layer distributor
Core layer 27-layer distributor
Connected to the core layer of the die head is a 27-layer distributor.
The development and application of nano-level super-multi-layer structure technology can easily meet the diversified needs of high-barrier and high-strength film products
.
05
05Create what you need
Create what you needHigh-end pursuit
High-end pursuitIn the context of high-quality development and dual circulation
CPP from single runner with low additional overcapacity
Iterative upgrade to three-channel 27+ laminates
Meet the needs of the mass market from a shallow level
Upgrade to lead customers' pursuit of high configuration
All kinds of special functional films empower the future
In the high-precision machining workshop with constant temperature and humidity, the ingenuity of each process is inherited, simplifying the complexity, and easily realizing the diversified needs of high-barrier and high-strength films
.
We always believe that innovation is not completely unconventional, but also a sense of scene application.
For example, various special functional films will lead a better life in the end consumer market, and only then can industry and life aesthetics be connected
.
Harmonious work environment
Awaken your inner beauty
Continue to explore industrial aesthetics
and share stories and experiences with you
Let industry return to aesthetics
With the most authentic products and services
Continuous output of kindness and sincerity
