Sistem Stripper - Ejector

The principle of this system is that the initial release of the product is driven by a stripper and ejectors simultaneously. This system can solve problems of the emergence of large deformation on the product due to stripping of the stripper system or due to the ejection of ejector system above. But in fact this system is mainly used in products where the wall or double wall inner wall has a snap. The principle mechanism of product release. aiming to achieve the distance along the mold opening delimiter pos1, where the stripper plate postal 2 no longer move backwards are other parts of the mold such as male (core) headings 3, 4 male, pos5 support plate, the runner heading pin 6 etc., will continue to move backwards until the composition range of mold. In this position ejector plate and post plate rentainer 7 does not come to move backwards because of the nylon tip shaft 8 which entered the post stripper plate press in post 2. In this position the product has been separated from male post 4, is a wall that has a snap in the end of the ejector pin is still mencengkaram post 9. In a subsequent retreat, nylon ripped from the stripper plate 2 so that the ejector plate post and retainer plate 7 with post-sam ejector pin 9 post interesting in retreat, the product apart from the tip ejector pin post 9. Ejector plate and the retainer plate with ejector pin post 7 post 9 held not come to move backward, it can happen with nylon at the end of the shaft of the post 8. Nylon TSB entered the press with the press can be adjusted by adjusting the bolt conical body. If the bolt rotated to right, in this case the right threaded bolts, then the tuner will sink bolts and nylon will enlarge, press the stripper plate style will grow. This press style that causes the ejector pin go stuck. At the next retreat, ejector plate and the retainer plate 7 will be heading in the push back by the support plate heading 5, where the impetus is greater than the style press nylon, making nylon uprooted from the stripper plate ejector pin which then come to move backward. In addition to nylon, or the opening sequence of movements can also be made of them by wearing jiffy lock.

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