Housing effect

Source: Bearing network time: 2018-01-12

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With the price of the bearing housing, the shape of the casting nylon can be produced. The end is converted into a polymer. Therefore, the reaction of the anhydrous acid catalyzed process is poor, and the conversion power is low; therefore, many people choose the catalytic reaction to get better results. Co-catalysts have been carried out since the 1950s; more useful production machinery was launched in the late 1960s to accelerate the commercialization of cast nylon. It was then written into the membrane cavity. Once the molten bearing seat entered the bearing housing; the thermoplastic housing was injection molded. This method of molding is to melt the bearing housing material. It is shaped into a certain shape by the cold cavity. The resulting shape is often the end waste; the equipment or the end waste is no longer required for other processing. Many details; such as convex The ribs, ribs, and threads can be formed in one step of injection molding. Then the pressure and speed are manipulated to write the melt into the bearing housing.
There are two types of injection equipment currently selected: screw pre-plasticizers or two-stage equipment; injection molding machines have two basic components: injection equipment and mold clamping equipment for melting and feeding the bearing housing into the bearing housing. The effect of the die device is: 1. The bearing housing is closed under the condition of the injection pressure. And the reciprocating screw. The screw pre-plasticizer uses the pre-plasticizing screw (top grade) and then writes the molten bearing housing into the injection rod (second stage) high pressure and high speed. The advantage of the screw pre-plasticizer is the stable quality of the melt. And the accurate injection volume control (mechanical thrust device with two strokes of the piston stroke). These advantages are bright, thin-walled products and high production rate. The residence time (causing material degradation) is higher equipment costs and repair costs. The most commonly used reciprocating screw injection equipment does not require a plunger to melt and inject the housing. Fuel tank, car shock absorber, seat back, intermediate support The frame and the armrest and headrest cover are blown for mechanical and furniture work; extrusion blow molding is a method for making hollow thermoplastic parts. The wide-ranging blow molding targets are bottles, barrels, cans, boxes. And all containers for food, beverages, cosmetics, pharmaceuticals and general merchandise. Large blow molded containers are generally used for the packaging of chemical products, lubricants and bulk materials. Other blow molding There ball product, the bellows and toys. On automotive production industry. Blow with a housing part, a door structure, system frame, or to have a jar of boxes open face.
Most of the other polyolefins usually made of this polymer are also blown and processed. Depending on the application; the most common blown extruded housing material is high density polyethylene, styrene polymer, polyvinyl chloride, Polyester, polyurethane, polycarbonate and other thermoplastic housings can also be used for blow molding. The engineering housings are widely accepted in the automotive industry. Material selection is based on mechanical strength, weather resistance, electrical, optical and other functions. The process according to process 3/4 blow molding is an extrusion blow molding process that forces the material to pass through a hole or bearing housing to make a product. Clamp the bearing seat and block the preform, to the cold wall of the cavity Inflatable type; extrusion blow molding process consists of 5 steps: bearing shell type embryo (extrusion of hollow bearing seat tube) type embryo large valve housing closed. Adjust the opening and maintain a certain pressure during cooling time; Bearing housing; write down the parts that are blown to trim the flash to get waste. The polymer mixing equipment is a process that progresses the polymer or polymer system through melt mixing. It is very large. It is estimated; compounding Process from The addition of a single additive to a variety of additive disposal, polymer alloys and reactive mixing.
One-third of the polymer production in the United States is subject to mixing. The compounding can be tailored to the functional requirements of the end application. The compounded product has a miscible function; for example, high gloss and excellent impact strength; or fine moldability. And outstanding stiffness. The blended polymer is generally pelletized for further processing. However, the industry is increasingly interested in combining the compounding with the next step. This prevents reheating of the polymer from the mill. And batch mixers to single-screw and twin-screw extruders. The most commonly used equipment for mixing (extrusion machines); everyone uses various types of melt mixing equipment. Because he can provide products of common quality; Lower operating costs. There are two types of mixing: Dispersed mixed materials are re-married and can be evenly distributed without the use of high shear stress. This type of mixture is called extended mixing or laminar mixing. Shear stress to break up the solids that are cohesive.
For example, when the additive mass is broken; the loose mixing is also called strong mixing. The actual particle size is reduced. The mixing operation often requires two mixing types in one process. It is mainly applied to thermoplastic materials; rotomolding is Rotary molding is a processing method for making hollow seamless products of various scales and shapes. Preservation. These years; rotomolding of thermosetting materials such as cross-linked polyethylene is also very fast. Because of rotomolding and No need for higher injection pressures; higher shear rates or accurate compound gauges; thus; both mold and machine are relatively inexpensive; and have a longer service life. The primary strengths are: machine function/price comparison The molding of high and messy parts is not required after assembly, and various products and colors can be formed together. The cost of the bearing seat is low, the color and material are simply changed, and the scrap is less lost. The powder or liquid polymer is placed in the bearing. In the seat; the basic processing process is very simple.
Heating together around two vertical axes; then cooling. The beginning of the heating period; if used as a powdery material; forming a porous layer on the surface of the bearing housing; then gradually melting as the cycle progresses; forming a uniform layer of uniform thickness; if used The liquid material; firstly moves and coats the surface of the bearing seat; when it reaches the gel point, it completely stops the activity. The bearing seat is then transferred to the cooling work area; it is cooled by forced air or water spray; then it is placed in the working area; here; The bearing housing is turned over; the finished part is removed; then the next cycle is carried out. The stainless steel welding rod produces a nylon that has a significant advantage over the extruded or molded nylon. Compared with nylon; cast nylon-6 has higher strength, wear resistance, scratch resistance and resilience. Most of the casting reaction is carried out under atmospheric pressure or very low pressure. Cast nylon has higher crystallinity and Molecular weight; good dimensional stability, simple machinability, high modulus and heat distortion temperature.

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