In the plastic processing industry, investing in a suitable blow molding machine is the key to ensuring smooth production and achieving economic benefits. However, facing the wide variety of equipment in the market, how to scientifically select and effectively maintain the equipment after it is in place is a topic that every user must master.
1、 Scientific selection: matching production needs
Choosing a hollow blow molding machine is not simply about looking at price or brand, but a systematic decision-making process that requires comprehensive consideration of the following core elements:
1. Products and materials: This is the primary basis for selection.
·Product specifications: Clearly define the maximum/minimum capacity, external dimensions, weight, wall thickness requirements, etc. of the product to be produced. This directly determines the key parameters of the machine, such as template size, gear opening, mold thickness, extrusion volume, etc.
·Raw material types: Different plastics (such as HDPE, PP, PETG, PC) have different melting characteristics and processing temperature ranges, and it is necessary to investigate whether the design of the extruder screw and barrel matches them. For example, processing PVC requires specialized screws and barrels that are corrosion-resistant.
2. Machine type and structure:
·Model selection: There are mainly two types: continuous extrusion type and storage type. Continuous extrusion is suitable for producing small, single variety products, such as mineral water bottles; And the storage type (especially those with storage cylinder heads) can extrude a large amount of melt in a short period of time, which is used to produce large or unevenly thick products, such as chemical drums and car fuel tanks, and can effectively prevent the billet from sagging due to its own weight.
·Number of workstations: Depending on production demand, single workstation, dual workstation, or multi workstation models can be selected. Dual station and above models can produce multiple products simultaneously in one cycle, greatly increasing efficiency.
·Drive mode: fully hydraulic drive, stable and powerful; All electric or electro-hydraulic composite drive has high precision, energy saving and environmental protection, and simple maintenance. The selection should be based on the investment budget and requirements for energy consumption and cleanliness.
3. Key performance parameters:
·Extrusion system: The screw diameter, aspect ratio, plasticizing capacity, etc. determine the feeding capacity and plasticizing quality of the machine.
·Mold clamping system: The locking force must be sufficient to ensure that the mold is not stretched during the inflation process; The template size and opening distance must be able to accommodate your mold and product.
·Control system: Modern hollow blow molding machines commonly use PLC and touch screen control. Attention should be paid to the richness of its control functions (such as billet curve control, multi-stage pressure control), ease of operation, and whether it has data interfaces for future integration into MES systems.
4. Suppliers and services: It is crucial to choose suppliers with strong technical strength and good reputation. Comprehensive after-sales service, timely technical support, and sufficient supply of original spare parts can minimize equipment downtime and ensure production continuity.