How to ensure that there is no color difference in the production process of blow molding machine

1. The problem of blow molding machine parts. Blow molding machine barrel screw has damaged gaps after long-term use, and there are dead corners in the gap. During the production process, the previous batch of different color materials slipped, resulting in uninterrupted color difference in the finished product. In this way, it is necessary to check the size of the damage problem and whether to choose to repair or replace the screw. The screws used by Sanqing Plastic Machinery are all barrel screws of well-known domestic brands. Each batch of barrel screws requires quality inspection by the national authority. Report and strict factory qualification report, and after intensive experiments in the factory, can be installed on the machine to ensure the wear resistance of the barrel screw.

2. The problem of raw materials and color masterbatch

Controlling raw materials is the key to solving color difference. If you use brand-new materials in full to control the parameter temperature, the color difference of the finished product caused by the raw materials is basically very small. If the returned material is added, the finished product will appear due to the color value of the returned material and the uneven mixing during the mixing process of the added quantity. Chromatic aberration problem. If you add recycled materials in production, you must adjust the addition ratio and mixing time according to the performance of the recycled materials to ensure uniform raw materials and reduce the color difference of the finished product. When using color masterbatches, strengthen the inspection of raw materials storage; in production, the same product should be produced from the same manufacturer, the same brand masterbatch, and color masterbatches. If you need to change the color masterbatch manufacturer, do a small sample test and start mass production only after meeting the standard. Sanqing Plastics Machinery has a complete after-sales service team. Before all equipment leaves the factory, the test machine is strengthened according to customer requirements, and the customer site is simulated, with good raw materials and color masterbatches, and qualified sample bottles can be blown, and they can be shipped after customer acceptance. And arrange for regional after-sales technicians to go to the customer to install, debug and train until the customer fully grasps it, and promises to maintain the equipment for life, so that the customer has no worries about buying the machine.

 3. The problem of uneven mixing of raw materials and color masterbatches

Poor mixing of raw materials and masterbatch will also change the color of the product. After the raw materials and the color masterbatch are evenly stirred, when they are fed into the hopper through the lower suction material, the color masterbatch is separated from the masterbatch due to the effect of static electricity and is easily adsorbed on the hopper wall. This will inevitably cause the amount of color masterbatch to change during the blow molding cycle, resulting in color difference . The most effective way is to use a hot air dryer instead of a suction machine to prevent the color difference caused by the separation of the toner and the master batch by manual feeding.

 4. The problem of color difference caused by barrel temperature

In order to reduce costs, some non-standard plastic machine manufacturers use inferior heating coils. In the production, it is often encountered that one of the heating coils is damaged or fails, or the heating control part is out of control and the temperature of the barrel changes drastically, resulting in color difference. Generally, the damage of the heating coil and the chromatic aberration will be accompanied by uneven plasticization, and the out-of-control heating of the heating control part is often accompanied by product air spots, severe discoloration and even coking. Therefore, it is necessary to check the heating part frequently during production, and replace and repair it in time when the heating part is found to be damaged or out of control to reduce the probability of such color difference. At the same time, when choosing a blow molding machine, you should choose a large brand and cooperate with a manufacturer with a complete after-sales team.

5. Problems when adjusting the production process

When adjusting the blow molding process parameters in the production process, try not to change the blow molding temperature, back pressure, blow molding cycle, and the amount of color masterbatch added. At the same time, the adjustment also needs to observe the effect of the process parameter changes on the color. Professional after-sales training is indispensable, and The production process cannot be adjusted under the guidance of non-professionals' experience.

6. The quality and craftsmanship of the blow molding machine head

The head of Sanqing press adopts high-quality 38CrMoAL. The heat treatment and tempering adopt extremely strict high standards. The nitriding time is long. The thickness and hardness of the treatment adopt the highest standards in the industry. The surface of the runner is polished to meet the mirror surface requirements. The mold core adopts high-standard electroplating technology to ensure the quality and color difference of the material strip, and perfectly present the blow molding product.

Friends who are concerned about China's high-quality hollow blow molding machine manufacturers can contact me and I will teach you how to choose equipment.

Hebei Sanqing Machinery Manufacture Co., Ltd.

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