Kunming plastic bucket wholesale
The method to distinguish the quality of plastic drums: whether there is a relevant production license, such as the national license for dangerous goods packaging products. For the raw materials selected for the plastic bucket, brand new materials are preferred; Look at various performance indicators of the product. Such as mechanical strength, heat resistance, and solvent resistance. Now, many enterprises will first consider the price and then the quality when choosing plastic buckets. This seems reasonable, because the profit and cost are placed there. Everyone is willing that the lower the cost, the better, and the higher the profit, the better. Many large and powerful enterprises will have their own proprietary departments to analyze the possible profit and loss risks of their products, which must include costs and profits. Now plastic buckets are indispensable in all major industries, because they can store goods more efficiently. However, the barrier performance of different quality plastic buckets to oxygen, carbon dioxide, nitrogen and organic solvents can vary by tens or even hundreds of times. Therefore, when selecting plastic buckets, we must pay attention to that the quality of plastic buckets cannot be judged only by their appearance, but the basic characteristics of plastic containers. When selecting plastic containers, be sure to fully understand the relevant properties of plastic. Plastic barrels are generally made by molding. Different molding methods often have a great impact on the performance and cost of products.
Kunming plastic bucket wholesale
There are several ways to remove the residue on the plastic packaging bucket: because the plastic packaging bucket is made of PE, after using the plastic bucket, there will be a lot of oil stains on the inner wall of the bucket, and it is also very difficult and troublesome to clean. Now, Shandong Zhongcheng Packaging Co., Ltd. will introduce the method to remove the residue of plastic chemical barrels. When we remove the residue on the chemical barrel, whether using polishing water or vinegar, we should ensure that it is soaked for a long time, so as to ensure that the residue in the barrel can be removed. Find a piece of dry cloth dipped with vinegar to cover it on the chemical plastic bucket with residue. After the impurities on the bucket are soaked, use a hard small slice to easily remove the residue of trade.
Kunming plastic bucket wholesale
What causes the temperature to be too high when processing plastic buckets? The reason for the high temperature during the processing of the plastic bucket: the volume of the plastic bucket oil tank is too small, the heat dissipation area is not enough, and the cooling device is too small. The high temperature of climate and operating environment causes the oil temperature to rise. The viscosity of the selected oil is not appropriate, the viscosity is large, the viscosity resistance is large, and the leakage will increase if the viscosity is too small, both of which can cause heating temperature rise. The pipeline of the plastic bucket system is too thin and too long, too much bending, and large local pressure loss and pressure loss along the way. The precision of components is not enough and the assembly quality is poor, and the mechanical friction loss between relative motions is large. The fit clearance of the mating parts is too small, or the clearance is too large after use, resulting in large internal and external leakage, resulting in large volume loss. For example, the volume efficiency of the pump is reduced, and the temperature rises quickly. The constant displacement pump oil supply system of the plastic bucket with the oil pump capacity selected according to the fast forward speed will have most of the excess flow flowing back from the overflow valve and generate heat when working. The unloading circuit in the system fails or the oil pump cannot unload when it stops working because no unloading circuit is set. All the flow of the pump overflows at the bottom, causing overflow loss and heating, resulting in temperature rise.
Kunming plastic bucket wholesale
The analysis and inspection of the quality of the molding raw materials shall be based on the requirements of the process characteristics of the injection molding raw materials. The water content, fineness, impurities, uniformity, color and luster of the raw materials shall be inspected, and the fluidity, thermal stability, shrinkage and other indicators shall be tested. If problems occur in the inspection, measures shall be taken in time to solve them. Preheating and drying: For plastics with strong moisture absorption, such as polycarbonate, ABS, nylon, etc., before molding, according to the moisture content requirements allowed by the molding process, fully preheat and dry them to remove excessive volatile matter and moisture in the materials, so as to prevent bubbles and silver filaments in the molded plastic parts, and also to avoid water degradation during injection. In injection molding production, in order to make the plastic parts easier to come out of the mold, some also need to coat a layer of release agent on the mold cavity or mold core. The commonly used release agents are silicone oil, zinc stearate, liquid paraffin, etc. For soft products or transparent products containing rubber, it is not recommended to use release agent for demoulding, otherwise the transparency of the products will be affected. In production, if it is necessary to change the type of plastic, change the color, change the material, or find that thermal decomposition or degradation reaction occurs in the molding process, the barrel of the injection machine should be cleaned. The barrel of plunger injection machine must be disassembled for cleaning. The spiral charging drum can be cleaned by air injection method. When the air injection method is used to clean the spiral carbon cylinder, if the molding temperature of the plastic to be replaced is lower than the molding temperature of the residue in the cylinder, first raise the temperature of the cylinder and nozzle to the molding temperature of the plastic to be replaced, cut off the power supply and add the return material of the plastic to be replaced, and then continue air injection to remove all the residue. Usually, after the plastic buckets are filled, they are stacked to reduce the storage space, which requires that the plastic buckets can also bear a certain weight.
Kunming plastic bucket wholesale
How to restore the gloss of the surface of plastic packaging barrels? First, the reason for the mold: whether the cooling system of the mold has water leakage, or whether the sealing system of the mold has been damaged due to corrosion due to long-term operation. If there is water leakage in a single direction of the mold, and the leaking water flows into the mold, causing the barrel wall to be dull, it is only necessary to replace the sealing strip to deal with the problem of water leakage in the plastic barrel. If the exhaust system of the mold is not good, which leads to excessive gas remaining in the mold during production, causing the brightness of the barrel wall to decline, then it is necessary to check the exhaust system of the repair mold. Of course, it may also be the problem of raw materials. First, understand its materials and functions, and adjust a reasonable process formula. If the sol fluidity of the material after heating is poor, the barrel wall will appear to be not bright enough. Properly add some low-pressure resins, improve the barrel temperature, and deal with other related problems.
