ES2370548B1 - CLOSURE DEVICE FOR THE MANUFACTURE OF BIMATERY PLASTIC PARTS WITH COMPLEX GEOMETRY. - Google Patents

Abstract

Sluice device for the manufacture of bimaterial plastic parts with complex geometry, parts consisting of two parts of different color and / or type of material by injection in mold comprising several actuators (3, 4 and 5), of configuration with adjacent oblique sides (3a and 4a) and displacement by hydraulic pistons (6, 7 and 8) arranged inferiorly and / or laterally that print movement both vertically, horizontally and obliquely, obtaining, once injected the first material, (a) of the piece (P) ) to make, expand the dimensions of the mold in different directions, according to the geometry of the piece, for example, with curved parts. In order to direct the horizontal and / or oblique displacements, guides (8 and 9) are provided in the corresponding actuators, with the corresponding inclination so that the displacement of the corresponding actuator is as appropriate depending on the shape of the plastic part (P) to form.

Description

mensions of the mold, once injected the first

Sluice device for the manufacture of bimateria plastic parts with complex geometry. Object of the invention

The present invention refers, as indicated in the above, to a sluice device for the manufacture of bimatter plastic parts with complex geometry, providing said function with several advantages and novelty characteristics, which will be described in detail below, which represent an improvement in the state of the art versus to the currently known systems.

In particular, the object of the invention is focused on a device, whose purpose is the manufacture of pieces of plastic material, of the type that, being constituted by two parts of different color and / or of different type of material, are obtained by injection into a mold by means of pressure actuators driven by hydraulic pistons, presenting the particularity that said device allows the manufacture of said type of parts even when they have a complex geometry, that is, it is not flat. Field of application of the invention

The field of application of the present invention falls within the technical sector of the industry dedicated to the manufacture of plastic parts, particularly bimatter parts obtained by injection into mold. Background of the invention

As is known, to obtain pieces of plastic material composed of two parts of different color and / or different type of plastic material, devices called a sluice are used, in which the existence of at least one actuator is contemplated that, moved by means of hydraulic pistons, allows to inject a first part of the piezay, after its displacement, expand the dimensions of the mold to be able to accommodate the injection of the second part of the bimaterial piece.

This system, however, has the disadvantage that it only allows the realization of flat parts, since the said actuators are of prismatic configuration and flat base only move in one direction.

It is therefore the objective of the present invention, to provide the market and industry with a sluice system such as the one described that allows the realization of bimaterial plastic parts with more complex geometries, it should be noted that, on the part of the applicant, there is no known existence of any other invention that presents technical characteristics, similar structural or con fi guration. Explanation of the invention.

Thus, the sluice device for the manufacture of bimaterial plastic parts with complex geometry that the invention proposes is con fi gured as a remarkable novelty within its field of application, since, according to its creation, and in a restrictive way, the above-mentioned drawbacks are satisfactorily resolved described of conventional systems, the characterizing details making it possible and distinguishing it from what is already known, suitably set out in the final claims that accompany the present specification.

Specifically, the sluice device in question comprises several actuators, which have the particularity of having a material-con fi guration, in different directions, as appropriate, depending on the shape of the piece, which may be of complex geometry, for example, with curved parts.

For this, the actuators are supported on pistons that move them from different directions, have a structural configuration of specific design to enable such displacement and have guides that direct the path of such displacements.

In a preferred embodiment of the invention, for the realization of a bimaterial part, for example, with a flat area and a curved area, three actuators are specifically contemplated, one at the end of the flat area, a central one, which encompasses the part up to the curved zone, and another in said curved area, the latter two sharing an adjacent inclined side that starts from the area where the flat part of the piez ends and begins the curved part thereof.

The described actuators are supported on hydraulic pistons that determine their corresponding displacements, such displacements being studied so that the first actuator slides vertically, whereby the piston on which it rests is arranged in its lower part; while the displacement of the central actuator and the actuator located in the curved zone slide together following the inclination of the guides they incorporate, so that their corresponding pistons are arranged, respectively, on the bottom of the central actuator and on the side part of the zone actuator curve.

These guides are a guide grooves, which may consist of lateral gaps or through holes that pass through the actuators, and projections are inserted into them that emanate perpendicularly from support parts provided on each side of the actuators and that drive the movement of the actuator with the inclination that in each case, according to the configuration of the piece to be formed.

Thus, once the actuators have been displaced, which will have been separated equidistantly from the first part of the piece once the first injected material has been set, the second material that will form the second part of the bimaterial part is injected.

The described sluice device for the manufacture of bimaterial plastic parts with complex geometry represents, therefore, an innovative structure of structural and constitutive characteristics unknown until now for this purpose, reasons that together with its practical utility, provide it with a sufficient foundation to obtain the privilege of exclusivity that is requested. Description of the drawings

For a better interpretation of the invention, this specification is accompanied by drawings in which, by way of non-limiting example, a preferred embodiment of the invention is illustrated, according to the principles of the claims.

In these drawings:

Figure 1 shows a schematic view in side elevation of an example of embodiment of the sluice device for the manufacture of bimaterial plastic parts with complex geometry object of the invention, the main pair being appreciated therein.

3 ES2370 548A1 4

tesque understands as well as the con fi guration and disposition of them, the actuators having been represented in it in their initial position.

Figure 2 shows a schematic view, similar to the previous one, in which the actuators are displaced to allow the passage of the second material to be injected.

Figure number 3.- It shows a perspective view of the central actuator, showing in it the configuration of the slots that serve as a guide for its movement, since in this example the central actuator with two guide slots has been represented.

Figure number 4.- It shows a sectional view of the central actuator, according to the section A-B indicated in Figure 3, showing in it the configuration of the lateral support pieces whose projections are inserted in the guide grooves that direct their movement. Description of an embodiment

In view of the aforementioned figures and in accordance with the numbering adopted, an example of embodiment of the invention can be observed therein, which comprises the parts and elements indicated and described in detail below.

Thus, as can be seen in these figures, the lock device (1) recommended for the manufacture of a plastic part (P) formed by two parts (a) and (b) of different color and / or different type of plastic material complex freezetry, for example, a flat part and a curve, comprises three actuators (2,3 and 4) that are supported, respectively, on hydraulic pistons (5,6 and 7).

Said actuators are arranged in such a way that, the first one, indicated in the drawings by reference (2), is of elongated prismatic configuration and the flat end of the plastic part (P) is located by counting with a flat top base that conforms to said end of the piece. (P); the second actuator or central actuator (3), covers the rest of the flat area of the plastic part (P), being larger and larger, and being equally flat, but having an oblique side (3a) corresponding to the oblique side (4a) adjacent to which presents the third actuator (4), which in its upper part adopts the curved shape of the plastic part (P) to be made, as can be seen in the figures.

In this way the central actuators (3) and the curved zone (4) share an adjacent inclined side (3a, 4a) that starts from the area where the flat part of the part (P) ends and begins the curved part.

These actuators (2,3 and 4), as indicated above, are supported on corresponding hydraulic pistons (5,6 and 7) that determine their respective displacements, being arranged so that the piston (5) of the first actuator (2) is located in its lower part and allows a vertical displacement thereof, while the pistons (6) and (7) are arranged, respectively, in the lower part of the central actuator (3) and in the lateral part of the actuator (4) of the curved area, since the displacement they are produced together following the inclination of guide grooves (8) and (9) with which said actuators respectively have

(3) and (4).

In these slots (8) and (9) guide, as seen in Figures 3 and 4, which has been represented by the central actuator (3), which may consist of lateral holes in through holes that pass through the actuators side by side, as in the example shown, they insert projections (10) that emanate perpendicularly from support pieces (11) provided on each side of the actuators for this purpose. It is possible to say that these slots (8 and 9) will present in each case the corresponding inclination so that the displacement of the corresponding actuator is the one that suits according to the shape of the plastic part

(P)

to form. In this way, the operation of the device

(one)

Object of the invention comprises an initial phase, shown in Figure 1, where the actuators (2,3 and 4) are adjusted to allow the passage of the first material to be injected that will form the first part

(to)

of the plastic part (P).

Then, the first actuator (2), the actuator located at the end of the flat part of the piece, moves down vertically to free the movement of the other actuators, center (3) and the curved area (4), which, following the path marked by the corresponding slots

(8) and (9) guide, they move lower and laterally jointly supported on the respective lower pistons (6) that of the central actuator (3) and lateral (7) that of the actuator (4) of the curved area.

Thus, once these actuators (3) and (4) have been displaced, which will have been obliquely and equidistant from the first part (a) of the part (P), the injection of the second material that will make up the second part (b) of the plastic part

(P) bimateria, as seen in Figure 2.

Finally, it should be noted that in order to avoid that the direction of travel of the actuators, especially of the central actuator (3), two slots (8) arranged at different heights, preferably formed in their position, as shown in the position, shall be placed therein. example depicted in Figures 3 and 4, but without limiting it.

In summary, then, the recommended lock device (1) comprises several actuators (3,4 and 5), whose configuration comprises adjacent oblique sides (3a and 4a) and whose displacement is determined by hydraulic pistons (6, 7 and 8) arranged lower and / or laterally of form that such actuators print movements both vertically, horizontally and obliquely, getting, once injected the first material, (a) of the plastic part

(P) to be made, expand the dimensions of the mold in different directions, as appropriate, depending on the shape of the complex geometry of said part, for example, with curved parts.

In addition, to guide the horizontal and / or oblique displacements, guides are provided, in the corresponding actuators, and which preferably consist of grooves (8 and 9).

Sufficiently describing the nature of the present invention, as well as how to put it into practice, it is not considered necessary to extend its explanation so that any expert in the field understands its scope and the advantages that derive from it, stating that, within its essentiality, it can be carried to practice in other embodiments that differed in detail from that indicated for example, and to which it will also achieve the protection that is sought as long as it does not alter, change or modify its fundamental principle.

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Claims (6)

one.

Sluice device for the manufacture of bimaterial plastic parts with complex geometry, of the type of pieces of plastic material that, being constituted by different parts of different color / or different type of plastic material, are obtained by injection in mold by means of pressure of actuators driven by hydraulic pistons, characterized by the fact comprise several actuators (3,4 and 5), whose configuration comprises adjacent oblique sides (3a and 4a) and whose displacement is determined by hydraulic pistons (6,7 and 8) arranged inferiorly and / or laterally so that said actuators print movements both vertically, horizontally and oblique, getting, once injected the first material, (a) of the plastic piece (P) to be made, expand the dimensions of the mold in different directions, as appropriate, depending on the shape of complex geometry that said piece has, for example, with parts curves; in which, in order to direct the horizontal and / or oblique displacements, guides (8 and 9) are provided in the corresponding actuators, which in each case have the corresponding inclination so that the displacement of the corresponding actuator is as appropriate depending on the shape of the plastic part (P) to form.

2.

Sluice device for the manufacture of bimaterial plastic parts with complex geometry, according to claim 1, characterized in that, in a variant embodiment for manufacturing a plastic part (p) forms different parts (a) and (b) of different color and / or different type of plastic material with a flat part and a curve, comprises three actuators (2,3 and 4) that are supported, respectively on hydraulic pistons (5,6 and 7), being arranged so that the first one (2) is of Prismatic con fi guration lengthened and placed in the end of the flat area of the plastic part (P) to be carried out with a flat top base that conforms to said end of the part (P); the second actuator or actuator

central (3), covers the rest of the flat area of the plastic part (P), being larger, its upper base equally flat, and with an oblique side (3a) corresponding to the oblique side (4a) that presents the third actuator (4), which in its upper part adopts the curved shape of the plastic part (P) to be made; and because the adjacent inclined side (3rd, 4th) of the central actuators (3) and of the curved area (4) part of the area where the flat part of the piece ends (P) and start the curved part. 3. Sluice device for the manufacture of bimaterial plastic parts with complex geometry, according to claims 1 and 2, characterized in that the piston (5) of the first actuator (2) is located in its lower part to allow a vertical displacement of the same, while the pistons (6) and (7) are arranged, respectively, in the lower part of the central actuator (3) and in the lateral part of the actuator (4) of the curved area, to allow the displacement of the they occur together following the inclination of the guides (8) and (9) with which said actuators (3) and (4) respectively have.

Four.

Sluice device for the manufacture of bimaterial plastic parts with complex geometry, according to claims 1 to 3, characterized in that the guides (8) and (9) consist of guide grooves into which projections are inserted (10 ) that emanate perpendicularly from side pieces (11) of support provided shown on the side of the actuators.

5.

Sluice device for the manufacture of bimateria plastic parts with complex geometry, according to claim 4, characterized in that the grooves (8) and (9) guide, consist of lateral holes made in the actuators.

6.

Sluice device for the manufacture of bimaterial plastic parts with complex geometry, according to claim 4, characterized in that the grooves (8) and (9) guide, consist of through holes that pass through the actuators side by side.