In the process of today's world economic changes, the plastic bottle industry, in which the structure of the domestic industry is also in a constant upgrading state, and in the current process of industrial upgrading, many value-added parts of the industry will be subjected to a variety of operational difficulties, but also unprecedented challenges, will face a variety of difficulties in today's society, Hollow blow molding products manufacturers gradually occupy a dominant position in the market.
Among them, the development of plastic bottles is facing a variety of problems, we can give you a careful analysis, for plastic bottles are labor-intensive industries, in the current labor costs are constantly rising, for plastic bottle enterprises, the cost of labor has a huge pressure, and the price of raw materials is constantly rising. It will also be subject to the continuous rise of various costs in the market, which is very obvious for the rise of raw materials, and will also bring another layer of pressure to the enterprise.
With the European debt crisis and the world's economic weakness, the foreign trade orders of plastic bottles are gradually declining, and many foreign trade enterprises are constantly turning to the domestic market, which has brought great pressure to the plastic bottle market which has been very competitive, and the price war is becoming more and more severe, and the profits of enterprises are becoming lower and lower. Shanghai blow molding processing
Some of the plastic bottle manufacturers, blow molding processing now in a variety of pressure situations, is more should take the road of industrial upgrading, and also need to take the road of innovation in the field of plastic packaging, which will continue to improve the added value of plastic bottles, and in the production and design of plastic bottles in all aspects of sales are constantly improving.
There are two main manufacturing methods for plastic packaging bottles, extrusion blow molding and injection blow molding. The main injection molding process of plastic packaging bottles is that in the process of injection molding, the main mold package of plastic bottles used for molding contains a negative mold
And positive mold two. Use an injection molding machine to inject the plastic melt into the cavity of the mold under high pressure. When opening the cavity, be sure to remove the positive mold from the negative mold and push out the bottle body. The following mainly introduces the characteristics of injection blow molding of plastic packaging bottles.
1. The melt of the plastic packaging bottle is injected into the blank mold, and the corresponding orientation effect is received around the inside of the mold cavity. In addition, the ambient temperature of the billet blow molding is lower than that of the extrusion blow molding, and the orientation effect generated during the blow molding process can be retained a lot, which can improve the overall strength and other related properties of the plastic packaging bottle.
2, the size of the plastic packaging bottle is accurate and high precision, and it is easier to ensure that the thickness of the plastic bottle wall is uniform and consistent according to the manufacturing requirements.
3. The surface of the plastic packaging bottle does not form a joint joint, does not need to be trimmed after molding, generally does not produce corners of the residual material, and extrusion blow molding production of the residual material is generally 5-30%. The gloss degree of plastic packaging bottles is relatively high, and the transparency of the plastic packaging bottles produced by transparent polymers is higher.
4. A sliding bottom module can be designed on the blow mold of the plastic packaging bottle, so the flexible performance of the shape design of the bottom surface of the plastic packaging is relatively large. It is more suitable for the manufacturing of molded printed plastic bottles and wide-mouth plastic bottles.
5. Under normal circumstances, most of the plastic packaging bottles using injection and blow molding are relatively small plastic bottles, and the speed of energy consumption will be significantly increased for products with very complex shapes.
