DE2441475A1 - ILTER DEVICE - Google Patents

Description

The invention relates to a filter device for filtering the plastic compound in a molding machine or in a molding tool, in particular an injection molding machine or hot runner injection molding tool.

In the known molding machines or molding tools, it can happen that the plastic compound contains foreign bodies contains that get stuck in channels, nozzles or forms and Cause interference. This is particularly the case with injection molding machines and particularly disadvantageous in hot runner injection molding tools, since there such foreign bodies form the injection openings can close. · - '

The purpose of the invention is to provide a filter device that can be used in such molding machines and molding tools can be used and the mentioned: Eliminate disadvantages.

The subject of the invention is a filter device

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for filtering the plastic mass in a molding machine or in a form tool, in particular Injection molding machine or hot runner injection molding tool that is characterized in that it has an inflow part has an expanding inflow channel which merges into a tapering outflow channel of an outflow part, wherein a filter plate is arranged in the area of the largest channel cross-section.

With this filter device, it is now possible to filter the plastic mass of such molding machines or molding tools, so that no foreign bodies get into it the channels, nozzles and molds can get in and cause damage. It is particularly useful if the taper of the Outflow channel corresponds to the enlargement of the inflow channel, so that the continuity of the flow of the plastic compound is preserved remain.

A particularly simple structure of the filter device results when the filter plate rests on a shoulder of the outflow part supports. It is advantageous if the inflow part and the outflow part of the filter device with one another are screwed, so that the inflow part and the outflow part only for replacing or cleaning the filter plate must be unscrewed. "- ·.

It is particularly useful if the inflow part of the filter device a connector for screwing into the molding machine or has the forming tool. In order to the filter device can be used as an add-on to a shaping machine, such as an injection molding machine or in particular an injection molding machine, or as an attachment a shaping tool, in particular a hot runner tool, can be used. For this purpose, it is also advantageous if the The outflow part is designed as a sprue nozzle. The filter pre-

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direction can thus easily be used for existing molding machines or for Fomgebungsv.'erkzs ·: -: ■ without these machines and tools must be changed.

An embodiment of the filter device according to the invention is described in more detail below with reference to the drawing, in which is shown a filter device in longitudinal section and in "exploded view".

On a dash-dotted ^ »** - indicated shaping machine 1, for example an injection molding machine, is a filter device arranged, which consists of an inflow part 2 and an outflow part, which include a filter plate 4 ″. . .

The inflow part 2 is designed as an adapter and for this purpose has a connecting thread 5 with which it is screwed into the molding machine 1. The inflow part 2 has an inflow channel 6 which widens conically and opens into a cylindrical part with an internal thread 7. The outflow part 3 is screwed into this cylindrical part by means of an external thread 8. The outflow part 3 contains an outflow channel 9 which tapers conically in accordance with the additional channel 6 of the inflow part 2. At its connection point 3 on the inflow part 2, the outflow part 3 contains a shoulder 10 on which the filter plate 4 rests.

Due to the conical widening of the inflow channel 6 and the conical tapering of the outflow channel 9, the pressure-reducing Effect, the filter device on the plastic pia% -% - e relative small amount. As the inflow part 2 and the outflow part 3 can be screwed apart, the filter plate 4 can easily be removed. and installed so that it can be cleaned or replaced if necessary.

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2UU75

The outflow part is designed as a sprue nozzle. Thus, the filter device can be designed so that they ansrelle ₃ of the previous gating apparatus in a bzvi Formgebungsr.aschine. Forming tool built-in can be grounded.

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Claims (6)

? a t »η r a η s ρ r ü c h e 1. Filter device :: :: j ": filtering the plastics material in a Formgebungsrnaschine or in 'a Formgebungsv ^r ool, in particular..' Hrritzgiessrnaschine or Heissfcanalspritzgiessv; ool, characterized in that it an a Zuströmteil (Γ-) with... having a widening inlet channel (6) which merges into a tapering outlet channel (9) of an outflow part (3), a filter plate (4) being arranged in the region of the largest channel cross-section. 2. Filter device according to claim 1, characterized in that that the tapering of the outflow channel (9) corresponds to the widening of the inflow channel (6). ■ 3. Filter device according to claim 1 or 2, characterized in that that the filter plate (4) is supported on a shoulder (10) of the outflow part (3). "..." '■ 4. Filter device according to one of claims 1 to 3 _S, characterized in that the inflow part (2) and the outflow part (3) are screwed together. 5. Filter device according to at least one of claims 1 to 4, characterized in that the inflow part (2) is a Anschlussgev; ir.de (5) for screwing into the shaping machine or the shaping tool. 6. Filter device according to one of claims 1 to 5, characterized marked that the outflow part (3>) as a sprue nozzle is trained. ■ 6098 11/079 1 ORIGINAL BATHROOM Blank page