DE2028009A1 - Device for molding thermoplastic material with mold halves that can be moved towards one another - Google Patents

Description

Holstein * Kappert'Mai & ehiiienfatfrik · "PHÖNIX" GabH ·, Dortmund

Gate direction sum Aueforming of thermoplastic »material with mutually movable mold halves,.

Devices for molding thermoplastic material are ready known in different execution. The hose section emerging from a spray nozzle of an extruder is thereby used For example, for molding hollow bodies to a length corresponding to the hollow body, on it from one another enclosed movable mold halves and then formed by means of pressure medium. '

The mold halves forming a foranest are both parallel as well as soheren-like against each other. Even at Close-tolerance guide elements to support the against each other movable mold halves, however, over the course of time again and again difficulties arise that each one mold cavity forming mold halves with their mutually waving dividing surfaces no longer match in parallelism. This inevitably leads to the shaping of the hollow body or to the ' Injection molding and injection molding of objects and unsightly finally annoying seams *

Especially in the production of thin-walled hollow bodies, \ _ the stability of the wall at the interface, which is squeezing of thermoplastic mass · considerably thinner is questioned.

While avoiding the disadvantages shown, the aim of the ■ Invention, in particular in a device for forming YQn thermoplastic material with molds that can be moved towards each other, keep the parallelism of the mold halves to a small extent Wise elohersus share.

This · Siel is achieved in that the mold halves and / or the half-half layers are held on a carrier, and dag

109851/0633

~ _··; Holstein A Kappert "Maechirienfabrilc" PHOENIX "ö ^ H, _ti JOprtmund.

between mold halves or mold half bearings and carriers a variable parallel alignment of the mold halves to one another permissible adjustment means are provided.

This will possibly show signs of wear and tear over time caught on the guide or holding elements for the mold halves. Even if a The balancing means become a mold half by clamping or the like the counter-form effective ^ whereby in such cases the parallelism and the tight closure of both halves of the mold is granted. As a result, no materials pressed against the wall enter the parting plane formed by the mold halves a »whereby the objects to be formed are almost free of burrs can be produced.

According to a further feature of the invention it is proposed that the compensating means of two sealingly with one another at their hands connected flexible plates are formed, the enclosed cavity can be acted upon by means of pressure medium.

Te eich has proven to be useful that the flexible Panels old their outer surface braced against a cushion Bind.

The between the mold halves and / or mold half bearings and the Supports arranged elastic equalizing plates are of dea Politer trimmed on both sides. Any on the end faces existing drill holes for attaching the carrier or the molds themselves are locked by the cushions. In this way the flexible panels are gently applied over the entire surface dismissed. 4th

According to a variant of the invention, it is proposed that ale Compensating springs are provided.

- 3 m.

109851/0633

Holetein & Kajapert Maechinenf'abriM "PHÖNIX" GmbH., Dortmund

It is also proposed that at least one mold half be attached a U-shaped angled mold half bearing held iat, the free legs of which have inwardly directed webs perpendicular to the arm axis, which are behind the support webs to grab"

It has proven to be useful that between the one another Corresponding surfaces of the webs and counter webs exchangeable spacer plates are arranged.

This makes it possible to interchange the mold halves independently of the mold half store, without ( at the same time to have to convert the half bearing. The half-mold layer can be removed from the carrier in the axial direction. The laughing between the corresponding "'of the bridges Finally, spacer plates arranged against and counter-webs allow easy interchangeability and make the exact alignment of the mold half bearing safely. Occurring inaccuracies Already during assembly or wear and tear of the dance plates can be remedied as quickly as possible by replacing them.

An exemplary embodiment is shown below with the aid of the drawing the invention explained in more detail. 3s shows:

Fig. 1 shows a cross section through a mold half with rOrmhälften-

bearings and girders.

Dl · mold half 1 is firmly screwed to a mold half bearing 2. The free legs 3, 4 of the mold half bearing 2 have at their end perpendicular to the thigh achae directed inwards otege 5 »6, which engage behind webs 7, b of a carrier 9. The carrier 9 is releasably attached to a pivot arm 10.

Two shaped half-bearings 2 and carriers 9 are compensating means arranged. According to the illustrated embodiment, exist di · equalizing agent halves of two sealing at their edges 12

'- 4 - BAD OBtGINAL

109851/063 3- ■: ί

Holstein &Kftppettt'taeohlnenfabrik ^M ? HCNIX " QmW ·, Dortmund

to interconnect "flexible plates 13® The 'ν η the plates 13 enclosed cavity is H beaufecaiagbax about eifien not Pictured connection means Dructaaedium. The flexible plate 13 has its outer surface against the attachment hole 15, 16, the final plate 17, 16 from the " ^r " -

Between the webs 5 »6 of the Fortahäirtenlager 2 and the counter» The webs 7 »ö of the carrier 9 are interchangeable spacers intended.

When charged dee cavity 14 with pressure medium, the vertical webs 5 are _t 6 firmly against the counter-bars 7, O of the support pressed. Any shifts in parallelism of the mutually corresponding mold halves 1, 1 'are absorbed directly by the plates 13 by displacement of the pressure medium.

Instead of the examples proposed example, a cavity-forming plate 13, it is also conceivable Pormhälftenlager between 3 and support 9 compression springs or the like. To arrange the j.uch Formhäli'ten I ₁ to the omission of the half-mold 3 stocked. 1 · engage directly with corresponding webs behind the counter webs 7, the support 9. .

109851/0633

Claims (1)

Holstein & KaPPert MaHehinenfitbrik "FHUNXX" GmbH., Dortmund ■ c Claims "<. "~ -« ι »—— * - · - ^ -— ■ -» ■ *? ... ■ 1 »Device sun molding of thermoplastic material with w mutually movable mold halves, daduroh marked, that the mold halves (1) and / or the mold half bearing (2) a carrier (10) are held and that β between mold halves (1) or Fornhälftenlager (2) and carrier (10) a changeable one parallel alignment of the fora halves (1) permitting each other Compensating means provided. Device naoh claim 1, characterized in that the Annealing agents also seal against one another at their edges j connected flexible plates (13) are formed, the enclosed Cavity (H) can be acted upon by means of a Druokmedlum Device according to claim 2, characterized in that the flexible plates (13) are braced with their outer surface against a cushion (18). Device according to claim 1, characterized in that springs are provided as compensating means. Device naoh the claims 1 to 3 * daduroh gekennseiohnet ♦> defl At least one mold half (1) on a U-shaped angled Mold half bearing (2) held 1st, the free legs (3 »U) perpendicular to the Sohenkelaohae inwardly directed webs (51 6), welohe behind counter webs (7, β) of the carrier to grab/ Vorriohtung naoh claim 5, characterized ι dab ■ between the corresponding surfaces of the webs (5t 6) and mating webs (7, 8) exchangeable spacer plates (19) are arranged. 109851/0633 Lee r side