When a machine is completed, what to do 1st before proofing? What&#;s go next before delivery? Let&#;s read on.
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2.1.1 The idle running test refers to the project test performed when the extruder is not running, the die-head is empty, and the die-head and the extruders are not heated.
2.1.2 After the final assembly of the blow molding machine is qualified, a continuous idle running test of no less than 8 hours shall be carried out.
2.1.3 Before the idle running test, the accuracy and reliability of each action must be checked in manual mode, and it is required to be correct for 10 consecutive times at least.
2.1.4 During the idle running test, the movement should be stable, without stagnation, flexible, reliable, and coordinated, with accurate procedures and accurate responses of all operating parts.
2.2.1 Prerequisites for productive experiments:
&#;Use a mold that satisfies the parison weight of 16±2kg, and has a reasonable design and good cooling effect.
&#;According to the specified process specifications,
&#;Adjust the machine to the best condition,
&#;Ensure that the wall thickness control system works normally,
&#;Ensure stable and reliable operation of the machine,
Continuously produce for 8 hours with fully automatic working mode, the production efficiency shall not be less than 20 pieces/h, and the forming rate shall not be less than 98%.
Trial Production Cycle Video.
2.2.2 The product quality should reach the following indicators:
a. Maximum Output
Turn each extruder to the highest speed, fully open the core mold, and continuously take the blank 5 times at the same time, and weigh it with a metering device. The maximum output should meet:
Among them, Wi is the weight of the parison taken each time, kg;
T is the same time of the parison taken, min.
b. Weight Uniformity
1&#; Parison Weight Uniformity
Continuous sampling 10 times, the weight uniformity calculation formula is:
Above them, W=Wprsn-Wart+Wlft
Wprsn means the parison weight, kg; Wart means the product weight,kg;
Wlft means the leftover weight, kg; .Wmax means the max. Parison weight, kg; Wmin means the min. Parison weight, kg.
2&#; The product weight uniformity and parison weight uniformity are tested simultaneously.
Above them, Wmax means the maximum Weight of the product, kgs;
Wmin means the minimum weight of the product, kgs;
means the average weight of the parison for 10 times sampling, namely
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c. Product Wall Thickness Uniformity
Sampling 10 times in a row, take points at the same position in the center of each product relative to the large plane, and check the wall thickness uniformity:
Above them, δmax means the maximum thickness of the same point, mm;
δmin. Means the minimum thickness of the same point, mm;
means the average wall thickness of the same point in 10 samples, namely
d. Barrier Layer Envelope Continuity
Check 1 out of 10 products. This item can be tested simultaneously with C. wall thickness uniformity. In a position where the shape of the product changes relatively little, cut a circle with a width of 100mm in the transverse direction, and keep it in an oven at 170 °C for 3 hours.
The barrier layer is required to be continuous and without break points.
e. D/E/F Layer Thickness Distribution Status (%)
This item is tested simultaneously with c. wall thickness uniformity. Take the same position points, after magnification processing, measurement and analysis, and calculate the percentage change of D/E/F layer.
Above , δNmax means the maximum wall thickness percentage of each layer;
δNmin means the minimum wall thickness percentage of each layer.
means The average wall thickness percentage of the same point of each layer in 10 samples, namely .
f. Minimum Wall Thickness
Randomly check 1 out of 10 products. Cut along the thinnest part of the wall thickness of the product and measure its thickness.
Requires xn--2-4lb586u.5mm (except when the product has special structural requirements).
g. Appearance Quality
Visually inspect the outer surface without defects, the pattern is clear, the color is uniform, the joints are good, and there should be no defects such as pores and looseness.
Each multi-layer hollow machine can only be used in the factory after passing the inspection by the quality inspection department of the manufacturer, and the product quality certificate is attached.
Before leaving the factory, each multi-layer hollow machine must undergo a continuous dry-running test of no less than 8 hours, and check whether other technical requirements of the multi-layer blow molding machine should meet the relevant regulations of JB/T - before the test. Check whether the dry run test meets the relevant regulations of 2.1.3 and 2.1.4.
Before each multi-layer hollow machine leaves the factory, it must undergo a production test of no less than 8 hours, and check the provisions of 1.2 before the test, and check the relevant provisions of 2.2 during the test.
Only when all the above-mentioned items have passed the inspections,and after the sample is qualified (some even need certifications), shall the manufacturer issue a factory qualification certificate for the blow molding machine and delivery then allowed!
Read more about : What is the QC standard of the multi-layer plastic extrusion blow molding machine?
When selecting a suitable Jerry can blow molding machine, there are several factors to consider to ensure that the machine meets your production requirements and provides the best value for your investment. Here are some key points to keep in mind:
1. Machine Capacity and Output: Evaluate the production volume you require and choose a machine that can deliver the desired output. High-capacity machines are more efficient for mass production, but they may also require a larger investment and space.
2. Material Compatibility: Ensure that the machine is compatible with the material you plan to use, such as HDPE (high-density polyethylene), which is commonly used for Jerry cans.
3. Automation Level: Consider the level of automation you need. Fully automated machines offer higher efficiency and lower labor costs but may have a higher initial cost. Semi-automated or manual machines could be more cost-effective for smaller operations or for those who prefer more control over the process.
4. Energy Efficiency: Look for machines that are energy-efficient to reduce operational costs and environmental impact. Modern machines often incorporate energy-saving technologies.
5. Quality and Precision: The machine should be capable of producing high-quality cans with consistent dimensions and wall thickness. Check for features that ensure precision, such as advanced control systems and quality monitoring tools.
6. Ease of Operation and Maintenance: A user-friendly interface and easy maintenance procedures are important for the efficient operation of the machine. Consider machines with intuitive controls and accessible parts for maintenance.
7. Warranty and After-Sales Service: A good warranty and reliable after-sales service are essential. This ensures that you have support in case of any issues and can minimize downtime.
8. Budget: Determine your budget and find a machine that offers the best features and performance within your price range.
9. Manufacturer Reputation: Choose a reputable manufacturer with a proven track record in the industry. This can be verified through customer reviews, case studies, and the company's history.
10. Future Expansion: Consider whether the machine can be upgraded or scaled up to accommodate future expansion plans without needing a complete replacement.
By taking these factors into account, you can make an informed decision and select a Jerry can blow molding machine that is suitable for your specific needs and production goals.
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