Plastic bottle cap mold design and processing
With the increasing demand for food safety, plastic bottle cap is an essential factor to carry food safety, and improving the quality of plastic bottle cap is an important way to build a harmonious society.This paper analyzes the main characteristics and key technical points of the plastic bottle cap mould in China, and analyzes the design and processing of the mould with a typical plastic bottle cap.
1. Characteristics and key technology of plastic bottle cap mold.
Plastic cap production is characterized by high speed rotary compression moulding unit, ensure that each compression molding mould module has independent running unit, which greatly improves the flexibility of production, reduce the mold production cost, prolong the service life.
The compression moulding mold is the foundation of plastic bottle cap processing, and the following technologies must be done to realize the molding tool processing technology:
The first is to choose the mold material reasonably, ensure that the molds must have extremely high strength and wear resistance and precise size control;
The second is material heat treatment, the material treatment technology is the present China's pressure plastic technology and the foreign technology gap in the centralized embodiment;
Three is the precision processing of the thread surface, the thread determines the various technology of the plastic bottle cap, so this link belongs to the main link, it mainly consists of turning, buckle, point spark processing and so on;
Four is high precision grinding, grinding is the final process, which has a key effect on the quality of bottle cap.
According to the analysis of mold design, to reduce the workpiece deformation appeared in the process of machining and machining error, on the basis of the standard mold design specification should reasonably use the right process, the specific as follows:
2.1 reasonable planning and design and processing should be carried out in key parts of the mould.
Core fall garden Angle process with sufficient space to remain, its main is based on the subsequent processing factors to consider, plastic bottle cap processing generally need for finishing after rough machining, avoid because there was a previous absence, finishing and lead to the phenomenon of plastic caps are smaller, should be in the early stage to set aside enough space, ensure enough size for processing after heat treatment.
2.2 Grinding is an important part of the plastic bottle cap processing, the main is the use of abrasive machining method to remove the material, belongs to the methods of improving the precision for plastic bottle cap, due to the relatively small allowance for grinding, so the link of operation must be strictly calculated, give full consideration to the contact surface chemical reaction, contact temperature and load type and so on.
2.3 heat treatment of parts.
Often appear in the process of plastic bottle cap mould processing is difficult to eliminate the quenching stress, therefore can adopt advanced treatment + high tempering scheme, but the need to control well in the implementation of tempering temperature, the practice shows that choosing 520 degrees Celsius temperature tempering can improve the strength of the mold;At the same time, we should normalize the number of tempering, and ensure three tempering.
2.4 solve the flying edge problem.
flying edge generally occur in the mold parting position, the main cause of the problem is in the process of injection molding because of too much pressure or injection speed faster, so the countermeasures to solve the staff mainly from the following aspects: one is to improve equipment performance.When selecting the model of injection molding machine, the rated capacity of the machine is generally greater than that of the axial cross-sectional area of the injection mold.Second, update process method.Specific is to extend the time of injection molding;The third is to redesign the mold.
High precision plastic mould is the key factor to ensure the reasonable processing technology and guarantee the quality of plastic parts.Therefore, we should strengthen the research on the design and processing of plastic bottle caps, so as to promote the realization of the strategic goal of China's manufacturing power. Kaipu Intelligent Compression Molding Machine Co.,Ltd have the powerful cap compression molding machine manufacturing team,While guaranteeing the production and quality of the bottle cap making machine, we will devote a lot of energy to research and development, and continue to share the technological achievements with the main bottle cap making factories.
Kaipu plastic cap compression moulding machine’s Advantages:
Main machine Feature:
A.Rotary muti compression molding process and advanced hydraulic system bring the highly stable and accurate production
B.Muti-cavity continuous high speed rotation, short cycle time, and high production efficiency
C.Low energy consumption in heating and cooling process.No hot runner, save energy effectively
D.No raw material wasted in spilling and hot runner circuit, Every single granule of raw material is fully used
E.Safe machine door interlock,emergency stop switch,rigid machine housing, U/L certified
D.Fully automatic in line production, no hand touching, avoid contamination
Compared with injection moulding machine and other plastic closure making machine manufacturers,Kaipu’s plastic closure compression molding machine have the following advantages:
Plastic closure Compression molding technology as a well known technology around the world in plastic closure production.
Less Energy Consumption,Overall energy savings per cap can be as high as 45%.
Because plastic closure compression moulding machine need lower heating temperature,which means less energy consumption in both heating and cooling.
High specific density and less shrinkage
Equal molding pressure, lower molding temperature allows the result of a higher density. Furthermore, less heating and cooling temperature gap accomplish less shrinkage of caps.
Quick color changeover without hot runners,only with the extruder.
Shorter cycle time (2 seconds) and therefore higher productivity
Due to lower extrusion temperature, caps are more quickly to be cooled down
in mould.It makes shorter cycle time, thus capacity rises.
Easy and flexible maintenance
Independent molds make it easier to change molds, only with hand tools but not crane.
Less material waste
Advantages of compression cap mold:
The major cap mold material has excellent wear resistance, high
corrosion resistance and high machinability, high coating hardness
2. High Precision
All the molds can precisely meet the dimension tolerance of cap
Kaipu has professional manufacture equipment, dedicated to
mold design and development, absolutely cope with your needs
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