Design Process - Service design

Design Process Effective design can provide a competitive edge matches product or service characteristics with customer requirements ensures that customer requirements are met in the simplest and least costly manner reduces time required to design a new product or service minimizes revisions necessary to make a design workable Design Process (cont.) Product design defines appearance of product sets standards for performance specifies which materials are to be used determines dimensions and tolerances Service design specifies what physical items, sensual benefits, and psychological benefits customer is to receive from service defines environment in which service will take place

Stripper system

In the picture looks stripper mechanism, where the product is dropped by a plate drawn by the pull plate is fastened to the plate cavity. At an open mold, the core will open for the movement carried by the moving plate. runner or know by heart is also separated from the sprue, because of the undercut at the end of the run ner pin. The products also come loose at the pull out step plates. The system is relatively inexpensive but only for a simple product of a certain size. If the product has a wide or large diameters and thin walls, so after products on the strip off from the core (male), there is a possibility the product will be deformation (bending). This is because: - Vacuum at the upper inner wall of the product - Large diameter products that produce products cengkaram force on the core component is also large, while the thin wall product is not strong to overcome the vacuum's and grip style. Deformation is common in the soft plastic material such as PE, PP, etc.

Functional and non-functional dimensions

Although every aspect of a component has to be dimensioned, some dimensions are naturally more important than others. Some dimensions will be critical to the correct functioning of the component and these are termed functional dimensions. Other dimensions will not be critical to correct functioning and these are termed non-functional dimensions. Functional dimensions are obviously the more important of the two and therefore will be more important when making decisions about the dimension value. Figure 4.1 shows an assembly of a shaft, pulley and body. A shaft is screwed into some form of body and a pulley is free to rotate on the shaft in order to provide drive power via a belt (not shown). The details of the three parts of this assembly are shown below the assembly drawing. The important function dimensions are labelled 'F', and the non-functional dimensions 'NF'. The main function of the assembly is to allow the pulley to rotate on the shaft, driven by the belt. Thus, the bearing diameter and length of the bolt pulley are important and therefore they are functional dimensions because they define the clearances that allow the pulley to rotate on the shaft. The belt will be under tension and the resulting lateral drive force will be transmitted to the shaft. The stresses set up by this force must be resisted by the screw thread in the body. Therefore, the length of engagement of the thread in the body is a functional dimension.
Engineering Drawing for Manufacture

by Brian Griffiths
Publisher: Elsevier Science & Technology Books
 

The mechanism of injection molding product expenditures

To remove the product from the mold, the mold Should Be moved to open the form in the which the movement is a return of the plate and other parts of the mold is Carried by the backward motion of the moving plate. Backward movement or opening Should Be synchronous is imultaneously or sequentially with movements also That other parts of the mold so That the product apart and fell out of the mold. At the time the mold opens, the supporters in terms of weight,mold is Divided into two parts That come the moving plate (cavity) and the part the which joined the fixed plate (core). In general, the moving mold plate to function as participating forming the inner product, where in this section are the components or the driving mechanism of the release of the product. Currently participating fix the mold plate is Generally sebagain forming the outer product, and will of Those parts have sprue and runner system.