ON SHAPPING VEINS OF NET WRAPPER BASED ON THE COMBINATION OF ELEMENTS ’ MOVING AND MODELING THE PROCESS OF KINETIC BY TWO STARCH CANS

Net wrapper is a traditional product of Viet Nam. The domestic and foreign markets have been liked it for a few marketing years. Net wrapper is one of the girdle type which has intermingled vein. Net wrapper makes a spring roll, this is also a traditional production of Viet Nam. Vietnamese produce 20 tons net wrapper daily, such as Vissan company produces 4 tons/day to satisfy the domestic market demand. Net wrapper product is liked specially. Nowadays, net wrapper is still made by a handicraft, therefore, the productivity is low, it has irregular vein and insanitary. In order to replace for handle movement in the handicraft of method by using machine movement process the kinetics simulation and motion of net wrapper are one of the great important process. In this paper we have described a kinetics shaped veins of net wrapper by the combined effects of the curved motion with rotated motion. This method allows the surmounted defect of handicraft and improving the capacity and quality of net wrapper, specially there is specifications supporting for process the designing. 1.INTRODUCTION In this paper we have introduced the new kinetics method by means of applications of machine movement process that could replace for handle movement in net wrapper production process. This new solution will enhance quality and quantity of the net wrapper, working conditions and the hygiene conditions in net wrapper production process. There are many methods to approach the kinetics shaped veins. In this paper, we have introduced the method that has determined the shaped veins of the net wrapper by combining effects of the curved motion of the piston with rotated motions of the trays and the other is the rotated motion of structure piston with rotated motions of the trays. This combination of motions not only defect of handicraft but also improve the density of net wrapper and these have guaranteed the technical standards of the net wrapper...Before using the parameters to serve for machine design, the kinetics shaped veins process was simulated and chosen the geometry parameters and the best kinetics for the design prosess. 2.THE HANDICRAFT METHOD Nowadays, Vietnamese have been manufacturing net wrapper by handicraft. The workers have to work in hot environment, they use a little starchcan which has some hole then they shake their hand to follow the given trajectory, the starch will fall down a hot pan, therefore the form of net wrapper is created, but the handicraft has many defect such as low productivity, irregular vein and insanitary... Science & Technology Development, Vol 12, No.04 2009 Trang 48 Bản quyền thuộc ĐHQG-HCM Flying ↓ Mixed powder → Starch can → curved motion → Rotational skillet ← Cooking oil. ↓


1.INTRODUCTION
In this paper we have introduced the new kinetics method by means of applications of machine movement process that could replace for handle movement in net wrapper production process.This new solution will enhance quality and quantity of the net wrapper, working conditions and the hygiene conditions in net wrapper production process.
There are many methods to approach the kinetics shaped veins.In this paper, we have introduced the method that has determined the shaped veins of the net wrapper by combining effects of the curved motion of the piston with rotated motions of the trays and the other is the rotated motion of structure piston with rotated motions of the trays.This combination of motions not only defect of handicraft but also improve the density of net wrapper and these have guaranteed the technical standards of the net wrapper…Before using the parameters to serve for machine design, the kinetics shaped veins process was simulated and chosen the geometry parameters and the best kinetics for the design prosess.

2.THE HANDICRAFT METHOD
Nowadays, Vietnamese have been manufacturing net wrapper by handicraft.The workers have to work in hot environment, they use a little starch-can which has some hole then they shake their hand to follow the given trajectory, the starch will fall down a hot pan, therefore the form of net wrapper is created, but the handicraft has many defect such as low productivity, irregular vein and insanitary…  We can be expressed as: And If we have n hole in two starch-cans (Figure 5) Trang 50 Bản quyền thuộc ĐHQG-HCM From Figure 6 we can be expressed: From Eq (5) we obtain The equation of n hole in first starch-can: The equation of n hole in second starch-can:

3.2.The combined effect of the curved motion with rotated motion
O 1 x ' y ' is a co-ordinate of a net wrapper tray which is assumed to rotate in a angle O 1 x ' y ' is a co-ordinate of a net wrapper tray is rotating.Oxy is a co-ordinate of the piston.

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Bản quyền thuộc ĐHQG-HCM The general equation of n hole in first starch-can: Eq.( 9) The general equation of n hole in second starch-can: Eq.( 10) The complicated curves have been used to define the vein of net wrapper.For example, the curves can be defined as

5.CONCLUSIONS
In this paper we have described a kinetics shaped veins of net wrapper by combining effects of the curved motion of the piston with rotated motion of trays.

Figure 1 .Figure 2 .Figure 3 .
Figure 1.The diagram of production by the handicraft method

Figure 4 .
Figure 4.The motions of the piston

Figure 8 .
Figure 8. Net wrapper 3.3.The curved radius One of the techical standard of the geometry qualities of the net wrapper is the curved radius.If the curved radius falls outside range of authorization.The net wrapper will break after rolling spring roll Thus we can define the curved radius by