Hasco Ibérica Normalizados, S.L.U. - Needle valves

In the field of the technician of hot channel, the solutions of closing of unitary needle confront to the user to numerous limitations and are used to to cause problems in the practice.

The separation by fusion produces sewings of union in the pieces of the surface; the range of lengths of filters and diameters is limited; the results of the simple moulds in small series can not transport easily in moulds of series of several cavities, since it changes completely the type of filter; the size of the filters of closing of conventional unitary needle demands big heights of setting and sizes of mould, etc.

The valve of universal needle Z10710 of Hasco solves of easy way many of these problems of hit. The basic principles of the unit of closing of needle are the universality and the modularidad.

The unit of accionamiento of needle, that is available in two standard sizes, can combine with all the filters Techni Shot and Valve Shot of Hasco. Like this it opens to the user a very wide range of types of filters, diameters of channel of mass and lengths of filter of 300 mm maximum, variants of points of injection and guided of needle.

The applications of the technical field with weights and loads very distinct also can llevar of a simple and flexible way, such as it requires in the medical sector and of the packaging.

The structure of the system is extremely compact and also can integrate without problems in small moulds with a height reduced of setting.

An important advantage of the Z10710 consists in that so much the unit, like an individual filter, can employ centred in the half of the mould, or like a unit of accionamiento between the distributor of hot channel and the filter. In this way, the moulds of prototypes or preseries with a type of filter determined can transmit without problems the knowledges purchased to the mould of upper series. Even they can employ the components used from the mould of preserie.

Like this they diminish considerably the costs of the system of hot channel in series.

The axial thermal sensors dilatation of the bar of the distributor does not exert any influence in the position of the needle or the guided of the needle. Of this way, prevents the deformation of the needle. The optimum relation L/D, thanks to the reduced length of the needle, increases the useful life of the needle and the point of injection.

Also it concedes big importance to the flexibility when selecting the type of accionamiento. The Z10710 acciona of pneumatics form by means of special cylinders placed in the outside of the mould, in which it has to adjust with precision the position of the needle in the cylinder, or employ units of accionamiento hydraulics more compact, that incorporate in the mould.

The length of career can vary between 2 mm until 17 mm in the two types of accionamiento.

The position of the needle of closing determines of unambiguous form. A surface of indication in the head of the filter allows the adaptation of the leading outline of the needle to the geometry of the piece and ensures the needle against twist.

Besides, the new valve of universal needle Z10710 of Hasco improves the behaviour reológico. It does not produce the separation by fusion,

so that the sewings of union, that affect especially the visual pieces of the surface, can avoid completely in combination with the type of filter adapted of HASCO. Thanks to the channels of mass conceived generously, the losses of pressesure of the system are minimum. The obturación is accurate and without edges neither corners, what prevents the shearing and the decomposition of the material. It gave especially importance to a profile of temperature homogéneo and symmetrical when creating the Z10710/... Also it can employ the Z10710/... For demanding plastics in the technician of moldeo with some proportion of fibre of glass.