WO2000002684A1

WO2000002684A1 - Process and device for producing packets of male parts

Info

Publication number: WO2000002684A1
Application number: PCT/ES1998/000201
Authority: WO
Inventors: Agustín ARANA ERAÑA
Original assignee: Erana Agustin Arana
Priority date: 1998-07-09
Filing date: 1998-07-09
Publication date: 2000-01-20
Also published as: AU8217198A

Abstract

The process is based on providing unitary male pieces (1-1') with semicircular notches (6) and ramifications (6') at their adjacent faces in order to form orifices (7) wherein glue is injected by means of an automatic gluing machine in order to fix and hold between each other all the male pieces (1-1') so as to form the assembly of male pieces as a monoblock body. The unitary male pieces (1-1') are placed on supports (3) mounted displaceably on guides (4) arranged inside a cradle (2); with such arrangement, the displacement of the supports (3) will enable the adjacent positioning and contact of all male pieces (1-1') to form the block of male pieces, the approximation displacements between such supports (3) being limited by means of positioning stops (5).

Description

PROCEDURE FOR OBTAINING PACKS OF MALE AND DEVICE FOR PUTTING INTO THE SAME

D E S C R I P C I Ó N

OBJECT OF THE INVENTION

The invention relates to a method of obtaining packages of males based on the fact that the unitary males that are to form the package, as a monobloc body, have on their side faces a semi-footprint that when pre-assembled the package determines blind holes in whose interior pour the tail.

The invention also relates to an installation for the implementation of said method, an installation comprising a cradle with male receiving supports, these supports being movable to collaterally and adjoiningly position such unitary males and then proceed to the injection of the tail to be fixed between the different males for the final conformation of the package as a monobloc body.

BACKGROUND OF THE INVENTION

In obtaining castings, the use of molding males consisting of a mixture of sand and binder is required, requiring in many cases, depending on the configuration of the male to be obtained, that it must be fragmented into a plurality of portions that are they obtain in an isolated and independent way, to later sympathize with each other all the males that have to form a monoblock package, with the definitive configuration of the piece of molding that you want to obtain.

Obviously, after obtaining the unitary males, it is necessary to unite those that have to conform the package, being able to perform that union or fixation of the different males in very different ways, being able to summarize as more important the following:

- Traditional system of union of males by means of threaded braces, straps, straps or similar, so that this type of union has the disadvantage that it entails a considerable loss of time, making them inadequate in facilities that require high productions, such as in The case of the automobile industry. Currently, this type of joining system is only used for special parts or small productions.

Male assembly system by gluing, so that in this case individual males are obtained to later be fixed to each other through a previous application of glue on the faces that have to come into contact, producing the subsequent stacking of the males to obtain the corresponding package. The application of glue is carried out on the males before they are deposited on the applied table, using nozzles that apply the glue on the entire face or at various points of the males.

This second type of male bonding system by gluing presents a series of drawbacks and problems among which the following can be mentioned:

- The queue generates application problems. - The amount of glue applied must be perfectly controlled, since if excess glue is applied, part of it will emerge to the outside, between two adjacent males, disintegrating at the contact of the molten metal and producing vapors, and as a consequence porosities in the piece to obtain.

- An important application of glue is required and quickly enough, so that the stacking rate is sufficiently short.

- If a layer of glue of excessive thickness is applied, it can affect dimensionally the package of males obtained, and it may happen that it is out of tolerances.

In the Spanish invention patent with application number 8701720 an automatic line for the formation of male packages using the technology of male forming by gluing is described.

A high efficiency and high performance system is currently used, which is described in the Spanish invention patent with application number 8703026, based on determining, in a suitable area of the males and during the conformation thereof, a groove or orifice of considerable dimensions, so that after the pre-assembly of said males, according to the package to be obtained, those holes or grooves are placed in extension of each other determining a receptacle or channel that affects the package longitudinally and integrally. On this channel, a mixture of sand and binder of similar characteristics to those used in obtaining the unitary males is molded by means of a male blower, so that the Molded mixture after hardening acts as a link and stiffening link between the different modules or males of the package.

The union obtained with the procedure described in that patent 8703026, is so rigid that it allows transporting or manipulating the block of males obtained, being able to cite as important advantages over other conventional systems or procedures, including those referred to above, that of being very simple , since you only need a manipulator and a blower machine. In addition, through this procedure or system high productivity is achieved, being able to produce between 70 and 80 blocks of males per hour, being therefore especially appropriate for the automobile industry that requires very high productivity.

To these advantages it is necessary to add a great versatility, since males of great complexity can be obtained, joining together the previously obtained blocks as many times as necessary.

However, the drawback presented by the method or system claimed in the said invention patent 8703026 is that it is necessary to use a specific blower for blowing the key or sand of the central channel of the male package, which if well it is easily amortizable when the productions are high, it is of high cost for those industries in which the productivity is reduced.

Therefore, it would be desirable, when the availability of investment does not allow it, the use of an alternative system or procedure that, although it fails to provide the same benefits as the aforementioned, provides sufficient benefits with a lower investment.

DESCRIPTION OF THE INVENTION

The procedure that is recommended is designed to constitute an alternative to the procedure for obtaining male packages described in the previous section, based on the fact that the individual males obtained are affected at least on one of their side faces of a half-footprint, and corresponding ramifications, in such a way that when they overlap adjacently and in contact they define blind holes in which the glue is applied by automatic injection of it.

This procedure includes the following operational phases:

- Prior obtaining of the unitary males by blowing with the corresponding half footprints in at least one of their lateral faces.

- Introduction of said unitary males in a cradle, being supported on the corresponding receiving supports.

- Displacement of the receiving supports so that the males are collaterally attached and preassembled, forming the package of males, with the required tolerance.

- Injected of the tail in the holes formed between every two males in correspondence with the upper wall of the male pack.

- Curing of the tail that provides the union between the males forming a monoblock package.

The installation includes a cradle in which a plurality of receiving supports are provided, cradle in which the unitary males are introduced, so that each male is arranged on a receiving support.

The supports are automatically movable on longitudinal guides provided for this purpose inside the cradle, producing the lateral coupling of the males, that is, their adjacent contact, counting the supports with some positioning stops so that the movement of those is made of automatically until the top of a support contacts that of the adjacent support.

The aforementioned stops are perfectly sized and regulated so that each male is attached to the adjoining one with the required tolerances.

The installation will be complemented by an automatic functioning glue machine, by means of which the glue is injected through a single nozzle that the machine can have, a nozzle that is positioned successively on each hole of the male block, or that said Glue machine have as many nozzles as holes present the male package.

In this way it is possible to obtain the conformation of the male packages quickly, since it allows a high degree of automation. DESCRIPTION OF THE DRAWINGS

To complement the description that is being made and in order to help a better understanding of the characteristics of the invention, according to a preferred example of practical implementation thereof, a set of drawings is attached as an integral part of said description. In an illustrative and non-limiting manner, the following has been represented:

Figure 1 shows an elevation view of several unitary males intended to form a package, and under them an elevation view and another plan view of the cradle provided with the corresponding receivers of the males represented in the upper part of said figure. , observing the mounts mounted in a movable manner on longitudinal guides and provided at their ends with the stops that limit the approach movement between them.

Figure 2.- Shows an elevation view and a plan view of the cradle with the receiving supports on which the corresponding unit males are arranged.

Figure 3.- Shows another elevation and plan view of the assembly represented in the previous figure, but in this case with the supports displaced on their guides, the males being collaterally attached to each other forming a package.

Figure 4.- Shows an elevation view similar to that of the previous figure, but with a sectioning at the top level of the male pack, showing in this figure the plan view of the same set, sectioned also by a horizontal plane.

Figure 5.- It shows, finally, a perspective representation of two males, on a larger scale than those that appear in the previous figures.

PREFERRED EMBODIMENT OF THE INVENTION

According to the method and installation object of the invention, the manufacture of male packages is achieved from the prior obtaining of a series of central unit males (1), and end males (1 ') that are located in correspondence With the sides of the package.

Each central male (1) has on its two lateral faces semi-footprints (6), as clearly seen in Figure 5, so that the extreme males (1 ') only have semi-fingerprints (6) on their internal face , semi-footprints that in the adjacent arrangement, when the males contact each other (1-1 '), determine communicated blind holes (7), which will be filled with glue after the injection of the same by means of an automatic or gluing machine, which will be equipped with a nozzle that will be positioned successively on the mouth corresponding to each of the holes (7), although such a gluing machine can be provided with as many nozzles as holes (7) present the male package, simultaneously injecting tail in all those Package holes

Said males (1-1 ') are introduced in a cradle (2) in which a series of supports (3) are provided, as many as males (1-1') will have the package to be obtained, supports (3 ) that are mounted so sliding on a pair of longitudinal guides (4), in order to allow the reception of the males (1-1 ') first and then to get them closer until they collaterally contact each other adjacently, counting those supports ( 3) with positioning stops (5), such that the displacement of those is carried out automatically until the stop (5) of a support contacts with that of the adjacent support, said stops (5) being perfectly sized and regulated so that each male (1-1 ') is attached to the adjoining one with the required tolerances.

In this way the males are joined together forming the package as a monobloc body, in a process that allows a high degree of automation, with the advantages of automatic gluing systems, and with the advantages of the systems that perform the gluing after having arranged the unitary males adjoining each other.

Claims

R E I V I N D I C A C I O N E S

is.- Procedure for obtaining male packages, which starting from the unitary obtaining of the males (1-1 ') that have to form the package as a monobloc body, is characterized in that the unitary males present at least one of their faces a semi-footprint (6) and corresponding ramifications (6 '), so that when the male package is pre-assembled in a positioning cradle, the overlapping of a male's half-footprints with those of the adjacent determine blind holes communicated (7) through the which is distributed the glue that is applied one by one or simultaneously in the mentioned holes, the procedure comprising the following operational phases:

- Manufacturing of the unitary males (1-1 ') by blowing with the half-footprints (6-6');

- Layout of the unit males (1-1 ') on corresponding supports (3) provided inside the cradle (2);

- Displacement of the supports (3) with the males (1-1 ') until all of them are attached and pre-assembled with the required tolerance;

- Injected the tail into the holes (7) and corresponding branches (6 ') until filling is achieved;

- Solidification of the tail and consequent firm union of the males forming the monoblock package. 2a.- Procedure for obtaining male packages, according to claim 1 ^§ , characterized in that it comprises a cradle (2) in which a plurality of supports (3) receivers of as many males (1-1 ') intended to form are mounted a monoblock package, supports (3) that are mounted on longitudinal guides (4) in which such supports are automatically movable, in order to allow the pre-assembly of the male package with the required tolerance, since said supports (3) have positioners (5) set and adjusted so that each male (1-1 ') is at a constant distance from the adjacent ones.