(1) The original network boundary has been multiplied and destroyed
The wireless monitoring equipment inside the video surveillance network is so limited that the network boundary of the internal building should be directly radiated to the distance of 30 meters or more in the core of the building, which greatly expands and destroys the existing network boundary of the internal network. Attackers can use this WIFI channel to increase the risk of internal network attacks and intrusions.
(2) It is vulnerable to intrusion and has high security risks.
Although the private wireless router provides certain security measures, it is often unable to fully utilize the security protection capability of the routing device due to the user's security awareness and technical level, making the wireless routing device vulnerable to attack and cracking. Intruders can easily invade the internal network through wireless routing devices by means of cracking and deception in a distance of 30 meters or more, and easily perform damage to the internal network.
(3) It is difficult to monitor, and it is difficult for managers to discover the behavior of private devices.
For the network with HUB or HUB-like access, the supervision of private wireless routers is very difficult. It is difficult for managers to distinguish whether the devices that provide HUB access are legal or private. Is it wired or wireless. More difficult to supervise is the routing device accessed through NAT. Even if the administrator restricts the MAC and device port binding, an 802.1X-based access control system is established. Such devices can still be easily deceived. Access, the concealment and deception of such access makes it difficult for managers to find, let alone regulate. (Author: Li Hongmei Huang Xiaoping)

Lost Wax Casting is the main technology of investment castings. In most conditions, it can be regarded as Investment Casting. The main process of lost wax castings is: mould design--mould making--wax injection--tree assembly--shell making-dewax-shell roasting-pouring-cleaning-heat treatment-machining-package.

Advantages of lost wax castings:

a, Accuracy: dimension tolerance--CT5~CT7,roughness--Ra2.5~6.3μm,weights range from 10g to 80kg;

b,Surface shape and inner cavity is almost not limited, we could manufacture lost wax castings with minimum wall thickness 0.5mm;

c, Almost all kinds of material can be used, such as steel, aluminum, copper, superalloy and so on.

Disadvantage of lost wax castings:

The production cycle is relatively long and it is not suitable for large products in terms of the features of this kind of process.

Classification of lost wax casting:

1. Sodium silicate casting: large surface roughness, low dimension accuracy with short shell making cycle. The hardening technique is chemical process. Normally most of Carbon Steel Investment Casting and alloy Steel investment casting are made by this kind of lost wax casting process. 

2. Silica sol casting: Small roughness, high dimension accuracy with high material costs and long shell making time. The hardening process of shell is a natural process under certain temperature and humidity. Normally stainless steel investment castings are made by this kind of lost wax casting process.

As a leading manufacturer of lost wax castings, A&M has the experience to produce almost all types of lost wax castings. Most of our lost wax castings are widely used in automotive, aerospace, marine, medical equipment, power plants and other industries


Lost Wax Casting

Silic Sol Castings,Lost Wax Casting,Dimensional Precision Casting,Brass Lost Wax Precision Castings

A&M Manufacturing Co.Ltd. , https://www.am-casting.com