I. Current status of extrusion casting process and equipment application Next page P Series Multichannel Variable Volume Micropipettes Multichannel Variable Volume Micropipettes, Variable Volume Multi Channel Pipette, Variable Volume Multi Channel Fully Autoclavable Pipette Topscien Instrument(Ningbo China)Co.,LTD , https://www.centrifugesupply.com
Squeeze casting technology was invented for 65 years, and it has strong technical advantages and has been valued by the mechanical manufacturing process industry. Unfortunately, due to the lag of traditional thinking and equipment development, the advantages of squeeze casting have not been fully demonstrated. At present, the extrusion casting process is basically carried out by open-casting vertical extrusion, which is not compatible with the most efficient horizontal cold chamber die-casting process. The vertical closed-die filling extrusion casting developed in recent years, like the "fine, fast, dense" die-casting principle invented 40 years ago, is supplemented by an injection mechanism, and its nominal pressure is limited, and it does not reach the extrusion. The compression and compression requirements of press casting are not strictly considered as squeeze casting in the true sense.
Compared with die casting technology, the existing extrusion casting equipment is not efficient, the part forming dimensional accuracy is low, and the cost is relatively high. Due to the low degree of automation of the equipment, the skills of the workers are relatively high, the operation is difficult, and the labor intensity is high. For the same part, the cost of the extrusion casting process is about 2 to 3 times that of the die casting process. In addition, the injection system is imperfect, and the complicated structure of the parts is difficult to produce, which limits the wide application of the extrusion casting process.
The problems existing in the application and application of the extrusion casting process are due to the lag of equipment development. At present, the biggest crux of the traditional extrusion casting process and equipment is that it cannot be effectively combined with the injection system of the traditional die-casting device. How to combine the clamping, clamping and extrusion is a key issue. Without breaking this point, the process potential of extrusion casting cannot be fully exerted, and its alternative advantages to the traditional die-casting process are difficult to fully express. Traditional die-casting technology cannot be combined with this technology to leap to a new level.
Second, the advantages of applying extrusion die casting technology on traditional die casting machines
The traditional die-casting process and equipment technology have been quite perfect, especially the horizontal cold chamber die-casting machine and the horizontal die-casting process. Its injection and clamping mode clamping device has strong process adaptability. Therefore, if the extrusion casting process cannot be combined with conventional die-casting equipment, it will restrict its wide application. Stepping out of this step, squeeze casting technology will have another branch, which is extrusion die casting technology. In other words, the application of extrusion casting technology on the basis of the traditional die casting machine is the extrusion die casting technology. According to the characteristics of the extrusion die-casting process, the traditional die-casting machine is correspondingly improved. This equipment is a brand-new extrusion die-casting machine.
1. Correct and comprehensive understanding of the functions of die casting process and traditional die casting machine
Grasping the principle of the extrusion casting process, it is not difficult to simply apply the extrusion die-casting process on the traditional die-casting machine. The key is to break through the traditional concept. It requires a comprehensive understanding of the performance of traditional die-casting machines, as well as a deep understanding of the traditional die-casting process, as well as the removal of preconceived fuzzy understanding.
In fact, the traditional die-casting machine has quite a complete function. It can not only carry out ordinary die-casting, but also can carry out extrusion die-casting and core extrusion-casting; not only can it carry out various low-pressure casting, differential pressure casting, Gravity casting, after adding a vacuum device, vacuum suction casting, vacuum die casting, vacuum extrusion die casting. If the thought is released a little, the technology of semi-solid processing and die forging is combined with it to form a continuous casting and forging process, which can also be effectively realized.
There are many types of die casting machines, and the injection force and injection speed of the injection system are "continuous stepless adjustable". Regarding the process characteristics of low pressure casting, differential pressure casting, and gravity casting, there is no problem in performing the above process on a conventional die casting machine. Installing such a mold on a die casting machine is not as expensive as one might think, because it is not necessarily designed to be as complex as a conventional die casting mold. Unfortunately, in practice we are hard to see related applications and reports. This is a misunderstanding, misunderstanding and misunderstanding of traditional die casting machines and traditional die casting processes.
2. Characteristics of traditional die-casting process and equipment and adaptability to extrusion die-casting process
There are two types of traditional die-casting machines, one is a full hydraulic master cylinder (lock) die-casting machine, and the other is a toggle-locking die-casting machine. Due to the low manufacturing cost of the equipment for clamping the elbow mechanism, such models are currently dominant in the market.