DE1979866U - INJECTION MOLDING MACHINE WITH TOOL CIRCULATION SYSTEM. - Google Patents

Description

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Injection molding machine with tool circulation system fa

SAifiNT DESCRIPTIOn

The invention relates to the arrangement of a tool circulation system with one or more mold carrier devices as well as one or more spray devices and removal stations for the production of moldings Made of injectable thermoplastic and thermosetting plastics or mixtures, in particular containing propellants Plastics where pressure is used to mold ·. filling cannot be accommodated by a tool lock, but a special closing unit is required and in which the overall cycle is essentially dependent on the cooling or hardening time.

It is known that for the production of Pormkodies After the injection molding process, rotary or rotary table units can be used as a recording of factory eyes.

The structure of these units can be divided into four groups, a special clamping unit is provided for each tool. They differ essentially through the various relative movements of ■ _ Injection to clamping unit (s) i

1. Injection unit fixed, clamping unit (s) on plate or . Fixed table! Allocated, with the latter being rotated.

2 «swiveling injection unit, clamping unit (s) permanently mounted,

j5. Injection unit fixed, clamping unit (s) run linearly on it past. .

4. Injection unit runs linearly past fixed clamping units. < . ■

2--

Furthermore, an arrangement is known in which a vertical injection unit with a vertical clamping unit is coupled, with a ring plate perpendicular to the injection unit between the guide rails Rolls through which several lower mold parts are attached.

• The invention has now set itself the task of the aforementioned To simplify arrangements, to make them more universal and to reduce the overall cycle of processing of thermoplastics significantly to shorten. The present invention is based on the consideration, that in the processing of 'thermoplastics in injection molding- ■ operate the high mold holding force only with injection and holding pressure must be applied and the cooling time for particularly thick-walled parts the entire cycle significantly influenced,

In order to avoid the high costs for the port locking devices, As they are required in the arrangements 1-4. To save, it was obvious to use the tool according to the invention immediately after the end of the injection and holding pressure side in a self-locked state on a Ural track for Bring the forming station. This is not possible with the aforementioned arrangements, either for each Tool its own Formzuhaltereinrichtung is required or as in arrangement 5 the tools after leaving the ■ The spraying stations are no longer closed and thus - a cycle shortening by shifting the cooling time to the The circulation system cannot be reached. In the invention, particular value was placed on the fact that heating and cooling of the tools can be connected during the entire cycle. This is the case with mold closing

installation in four-pillar design is only possible if the. Mold clamping device is set up vertically and the tools out and between the orbit outside the mold clamping device the pressure plates of the locking device are pushed. Injection is preferably carried out in the Mold parting line, as the combination options with regard to the assignment of injection and clamping units is larger in relation to the shot weight. By having either the tools swivel on Rolls or drives with fixed rollers on a circulation system that is also mounted on rollers the moving masses when transporting the tools are limited to this. For closing the mold during injection the rollers on the tool or the roller conveyor in the mold clamping device can be lowered so that the form fit takes place directly on the tool. Pushing the tool in and out of the mold locking device can be be carried out hydraulically, pneumatically or mechanically. Stop and centering strips ensure an accurate Fixation of the tool in B train on the injection unit .. The drive of the tools in the orbit can take place both centrally via driver arms or via a chain drive located in the orbit. When running in into the demolding station, which due to the. The fact that during demolding only the weight of the upper part of the tool must be lifted, can be built very easily, the locking on the tools is via special Unlocked stops.

The demolding station is designed in a C-shape so that the feeders for heating and cooling can remain connected. Next is for raising and lowering the upper part of the tool only one recording is provided in which the

Tool due to the movement of the tool circulation system .retracts. A lock on the lower part of the tool prevents it from being lifted off and slipping same during demolding. With the lifting arrangement for the upper part of the tool is directly coupled to the ejector.

Compared to the known arrangements 1-5, according to

.the invention_a substantial reduction in price and association y 'f

/ Folding achieved with unverselleren application possibilities that

l) any shot weight by combining with corresponding injection units can be achieved,

2) by tangential setting up of a complete spray; » guiSz machine to the infeed system the mold locking device can be saved and after completing an order the injection molding machine again for others Tasks can be used *

3) Not a separate mold clamping device for each mold is required, and thus the moving masses are limited exclusively to the tools,

4) by shifting the cooling time to the circulation system a significant shortening of the cycle can be achieved through better utilization of the injection unit,

5) by simply pushing the tools onto the circulation system a tool change can take place in a much shorter time.

In addition to the aforementioned points, there is also the fact that with Ver. use of the chain drive is not tied to the round shape of the circulation system. There is also the 'possibility by varying the size of the circulation system, several injection units to attach. ■

The invention is based on the drawing in an embodiment. example explained. In the drawings represents

Fig. 1: the entire system in top view Fig. 2: a section along the A-B axis Fig. 3 * the tool (mold) with rollers and slide

On a tool circulation system 12 with the guide rails 8, any number of tools 6, which run on wheels 7 in a circular or oval path, are rotatable and fixed to the individual via a driver chain arranged between the guide rails 8 or a centrally arranged in the circular path Forming stations β connected driver structure 3 driven, wherein the drive includes all conventional drive types * The mechanically operated stop 15 ensures on the one hand to stop the orbital movement _t on the other hand for. unlocking the · tool 6 »

The tool is moved over the plate 16 by a displacement device 5 with the linkage 10 in a short-stroke mold locking station 2 pressed or pulled * The mold clamping station 2 generates the required clamping force for the Injection process that takes place after reaching the same on the injection molding machine 1 is initiated. When the mold clamping station 2 is approached, the resiliently suspended rollers 13 ira disappear Tool 6, so that the forces are absorbed by the whole .Werkzeugober-Ääne.

After the injection has taken place and any holding pressure process has taken place, the mold clamping station 2 is lifted and the tool is brought back onto the orbit by means of the shifting device y [s. The rollers 13 reduce the friction between the tool β and the plate 1β. In parallel or after the process described, a tool 6, which is ready for removal, is opened in the demolding station 4 by means of a lifting device 9'aa.a «

For this purpose, the tool moves under the lifting device 9i then the tool is over the Stop I9 unlocked. (Lock 1 $) · ßi © lifting device 9 then lifts the upper part of the tool 6 from the lower part. From below, an ejector 11 ensures which is coupled to the lifting device for the Aus ~ press the molded part, which after the "ejection." can be removed by hand »The removal station must be at. necessary tool cooling «or heating connections be built in C-shape, with the C-opening The center point of the orbit must be directed »Only if such connections are omitted * can a double stand removal rod to get voted.

Claims (1)

1 »SpritagieSaiasöhine consisting of a siebrsrer short Koiabinstiou spray l # silage or & u strength * Formsulmlt $$ lnrichtung (@n) 2 (hydraulic * paeuisatisssho or mööiianisahö face) of a Werkaeugumlaufanlage 12 and one or more Entnaliiaestafc ion 4 characterized gekean * a & ä the Werka © iigmalaufsnlsg © IS tföer © iae Hit » 3 »in the center or via © ine In der tfejlau?« bahn liegesiuchten Hltnetoerlcett © is driven and not is built on a circular balm » 2 * Injection molding machine Baoh claim I thereby g öaE the combination ^ on Sprifcasinriehtiag and ei «rla! sttm $ a« 0 of a norasal Söhneckonspritäg the fca & g «* tial to the overflow & nlage is made« exist uao «Claim 1 dacluroh that on the horizontal separate working day β is provided with retractable, Eolient 13 ^ and after the end of the Bisisprits * bsw * Kaohdruökvorgansos from the FonnsuhaXteeinriolitussg 2 (pneiissatisöh ^ hydraulic or ^ © ohanisch) on the circulation system IS n becomes * 4. SpritÄgieSjnaschin © aaoh claim i dacäuroh öaS the solbstverriögelte Werkaeug δ by hoof driving on an oa located in the eating research station 4 »Aisschlag is unlocked» ·. 5 «Sprit2gi03imschiae according to claim t thereby geicesnz © iohaet, &&& dia Hubvorrlchtisag 9 iß ^ p Bntformungsstatlon 4 isi-t dom Augswerfer 11 is coupled * *) or the roller conveyor in the ij ' is versenioar «* £ * WS 2 * 6 * SpritssgXeiSsaschlne Bach claims 1 thereby öa0 Blne_ centering & ®v Ws ^ kssus © 6 in the CiinrjLohtung 2 & ®v! I® In the Eatformunsssfcation 4 by appropriately attached® 3j © istea takes place » Considering sucked © lh% 786 HS 008 061 064 358 01? 871 2β5 808 88? 842 266