Factors to Consider When Buying a Plastic Bottle Mould Machine

If you are looking for a plastic bottle mould machine, you must consider some factors. The first one is the process of blow molding and extrusion. The second factor is the size of the machine. It should be large enough to produce various shapes and sizes. Finally, a plastic bottle mould machine needs after-sales service from a professional team. A reliable company should provide this kind of service to ensure stable operation of the machine.

Extrusion blow molding

The process of extrusion blow molding is a common method of producing a wide range of plastic bottles, from small water bottles to larger containers that hold motor oil. The process produces bottles with a visible seam, and is therefore highly recyclable. The process involves a hot tube being dropped from an extruder to a water-cooled mold. The end result is a highly durable, dependable product. Extrusion blow molding also allows for customizing the volume and shape of the packaging.

The first step in the process is called a parison. This hollow piece of plastic allows compressed air to pass through it. The plastic then moves through the extrusion tooling until it reaches the neck portion of the mold and is sealed in a water-cooled mold. This process can also be used for the production of jars, containers, or plastic bottles. The final product is a bottle that looks and feels just like a traditional bottle.

Two-stage process

The two-stage process is a popular method of plastic bottle mould production. It divides the three stages of the molding process into two separate machines, resulting in higher throughput and greater flexibility. For example, one machine can produce preforms, which can be stored and used later on in a later stage of production. The second machine, called a reheat blow machine, will blow the preforms into the final bottles. The advantage of this process is that it can produce large volumes of bottles, allowing for a lower per-piece cost.

The second stage of the two-stage process for plastic bottle mould involves a third procedure. This is known as extrusion blow molding, and it processes several polymers. This process begins with the melted plastic and extrudes it downwards. Once the material has reached the desired length, the process closes. A rod-like blow pin is then inserted into the neck end of the parison to form a threaded opening. The rod-like blow pin inflates the parison within the mould cavity, and the process ends with the bottle being ejected.

Steel used in making molds

The most common metal used in the production of plastic bottle molds is tool steel. This material is considered a "hot work" steel, which means it can be used in high-volume production runs. Compared to Al-7075 and mild steel, it is easier to machine and holds tight tolerances. This type of steel is also more expensive. For high-volume production, it is best to use an alloy steel, which is used to produce molds with hardness levels up to 100,000 parts.

In addition to steel, aluminum and beryllium-copper alloys are also commonly used in making plastic bottle molds. Steel molds are more durable than aluminum molds, and are often preferred for high-volume production. Aluminum molds are less expensive and are also not suitable for parts with high dimensional tolerances, such as bottles. However, steel molds are generally better suited for tougher plastics and abrasive materials.