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Mould tools

Calendering can achieve surprising accuracy on the thickness of a sheet. Typically the tolerance is 0.005 mm but to achieve this it is essential to have very close control over roll temperatures, speeds and proximity. In addition, the dimensions of the rolls must be very precise. The production of the rolls is akin to the manufacture of an injection moulding tool in the sense that very high machining skills are required. The particular features of a calender roll are a uniform specified surface finish, minimal eccentricity and a special barrel profile ( crown ) to compensate for roll deflection under the very high presurres developed between the rolls. [Pg.315]

With the methods relating to the first group, powder is compacted in a closed volume or between adjacent planes. It is conventional practice to heat the powder. After drying (or without this stage), the obtained compound is crushed and sized or forced through calibrating holes in a requisite moulding tool. [Pg.149]

The plastic sheet is softened at the heating station. It then indexes to the forming station where the mould tools are located. The forming of the sheet is by a combination of air pressure and male core... [Pg.29]

Carbon forming- and moulding-tools and casehardened grinding tools must be provided for each size of joint being made. The standard taper surfaces of these tools must be protected from any type of wear or damage. The success of this method of making standard taper cones and sockets depends on the accuracy of the tools and on the accuracy of the glass blanks. [Pg.103]

The main limitation of the process is the loss of material in the sprue, runners and gates - as thermosetting materials cure during moulding, this cannot be reused. Moulding tools are usually more complex and therefore more costly than compression-moulding tools. [Pg.260]

Molding compound is transferred in the cold state by pressure from the material hopper into the main injection chamber. Here it can be preheated before injection into the heated mould tool. Injection, through a special nozzle, can be either by ram or screw pressure. If screw feed is used, the screw must be of the type designed to process thermosets as opposed to thermoplastics. [Pg.233]

P(l) Phenolic resins should be considered when the overriding emphasis is on performance nnder heat, retention of properties under lire conditions or low emission of toxic fumes (about 10% that of an isophthalic polyester based glass FRP). The attractive characteristics of composites made from phenolic resins are low flammability, low spread of flame and little smoke. The resole phenoUcs allow similar curing to polyesters with the addition of an acid based catalyst or heat. Though cure at room temperature is possible, an elevated temperature post cure above 80°C is required to obtain dimensionally stable materials. The use of acid based catalysts may lead to moulding tool corrosion. [Pg.49]

P(2) Moulds, tools and other equipment shall be clean, dry and at a similar temperature to the ambient temperature of the workshop. [Pg.214]

The design of the moulding tool is determined from the shape of the components that will be produced. For this reason it is of prime importance that the designer of the components works closely with the tool designer and the moulding technologist. Cooperation at this level is vital to produce a tool design that will work well in production. [Pg.37]

The mould bolster comprises the bulk of the moulding tool and forms the matrix that supports and locates the cavity inserts. The bolster block also encompasses the runner system. The metal of construction must reflect the working needs of the mould. [Pg.43]

Toolmakers. They make dies and moulding tools which are used to punch and form metal components and produce plastic components such as car bumpers. [Pg.166]

Resin infusion technology is a process using a dry fibre laminate preform. A dry stack of fabric material is placed into a mould tool the fabric is sometimes... [Pg.377]

Moulding tools are of the same materials and finish as described for compression-moulding tools but without, of course, the need for a powder cavity. They are generally more expensive than compression-moulding tools but, because of the higher production rates of injection moulding, it is possible to use smaller, i.e. single-cavity, and hence cheaper tools and maintain the same... [Pg.247]

We now proceed to create information on the injection moulding tool. Right click to open the sub menu again, select Tool. [Pg.53]

The research and development outlined in this monograph was carried out in close collaboration with industry and a wide range of products were tested, for feedback visit the Web site http //www.simsoftks.com. The case studies which follow demonstrate the industrial potential of this methodology the first one deals with the assembly planning of an evaporative humidifier as shown in Fig. 7.1 and the second one deals with the costing of a moulding tool. [Pg.73]

We look at the costing of an injection moulding tool for the manufacture of turbo fan grill as illustrated in Fig. 7.7. The front grill of the turbofan is a plastic moulded part and the tooling for it is illustrated in Fig. 7.8. The... [Pg.77]

Fig. 7.8 The moulding tool assembly for the turbofan grill manufacture... Fig. 7.8 The moulding tool assembly for the turbofan grill manufacture...

See other pages where Mould tools is mentioned: [Pg.49]    [Pg.241]    [Pg.61]    [Pg.153]    [Pg.288]    [Pg.13]    [Pg.8]    [Pg.57]    [Pg.58]    [Pg.75]    [Pg.75]    [Pg.36]    [Pg.42]    [Pg.441]    [Pg.258]    [Pg.261]    [Pg.262]    [Pg.7]    [Pg.78]    [Pg.291]    [Pg.383]    [Pg.656]    [Pg.212]    [Pg.249]    [Pg.268]    [Pg.342]    [Pg.245]    [Pg.245]    [Pg.248]    [Pg.77]    [Pg.77]    [Pg.78]   
See also in sourсe #XX -- [ Pg.8 , Pg.17 , Pg.20 , Pg.173 , Pg.184 ]




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