EP1047533B1 - Method for producing cups - Google Patents

Description

The invention relates to a method for Manufacture of cups from prefabricated cup bodies which are attached later.

Cups, jugs, jugs and the like, which usually consist of several different parts are assembled very labor-intensive operations in their manufacture.

It was therefore tried a few years ago that the general symmetrical products in one operation in Manufacture die casting process, one of two or three parts existing form was used. Difficulties, that arose mainly from the uneven detachment of the body from the surfaces the die casting mold. This uneven detachment caused that the blank is different at the individual areas difficult to remove from the mold, which often leads to Break. In addition, faults always occurred on the Seams of the two molded parts, which are subsequently plastered had. This technology was therefore abandoned.

In large companies the cup bodies and the Handle for such dishes separately in large Cycle lines manufactured, cleaned individually and then mechanically or by hand on the individual cups, jugs, jugs etc. appropriate.

For the manufacture of the cup bodies, plants are known which are suitable for the plastic shaping of cup bodies. The cup bodies are shaped and cleaned on these systems and in a later step, the finished handles attached to the cup body.

Another plant used for the manufacture of cup bodies an isostatic shape. In such a facility the cup bodies are pressed isostatically without handles and handed over to a rotary indexing table. Deburring takes place there and blurring of the rim of the mouth. The handles are separated made and then afterwards with the cup bodies connected.

A third method of making cup bodies is based on a die casting process. For this purpose, an attachment from Company called SAMA, Germany. For shaping the cup body tightly closed porous plastic forms are used here Commitment. In contrast to the plaster molds, these have molds a very long service life. The cup body can be simply detach it from the mold when there is air from outside Form is pressed. In this process, the Water absorbed by the mold from the slip away.

The handles and other parts to be attached later separately manufactured on special systems, e.g. from SHIN-EI KIKO Co., LtD., Japan. It are casting plants, mostly in large Mold units with a very large number of single or Double handle shapes make these items, or around Henkelgießkarussels. The handles are then separated and cleaned.

The individual parts are then in a separate system attached to the cup or can bodies. That takes place on Example at SHIN-EI KIKO Co., LtD., Japan, by hand by on the cup, jug or can bodies garnish slip is applied and then the handle, the pourer or the like can be applied by hand under pressure.

Mechanical systems for attaching the handles to one Cup bodies are offered by many companies worldwide.

In addition, clocked rotary tables are known, in the cup body and the handles are inserted individually and then mechanically together be connected, or individual jobs where the handle clamped and coated with garnish slip and then is by a device that is lowered from above, the Cup body pressed onto the handle.

In the described methods, the use of wage-intensive Not to bypass operations. Besides, the result is especially not with high-quality porcelain dishes satisfactory. Paragraphs or margins, as well as faults the seams have to be removed afterwards, whereby the The costs are increasing.

Another method is described in US-A-2,217,346, NL-A-299 666 and US-A-2,007,993. The prefabricated cup body, to which a handle is to be attached is used for this procedure so to a two part form with one in it contained cavity, which is shaped according to the handle, applied that the places where the handle with the cup to be connected on the openings of the cavity in the two-part form. About feeders in the the molding compound is in two parts up to the openings inserted the cavity and connected to the cup body.

This process has no significance in manufacturing, because it has major disadvantages. A must in the cavity relatively high pressure can be generated, so that a perfect Connection with the shards of the cup body can arise. This often leads to breakage, particularly of a thin cup body. However, if the pressure is too low, the cavity becomes not completely filled with molding compound and the handle and so the finished product is unusable. On the other hand the prefabricated cup bodies are not the required ones Dimensional accuracy to always have a tight seal on the Form openings so that warping at the joints of the cup body with the handle.

It is therefore the object of the present invention 'to create a simple process by which the handle is inexpensive manufactured and attached to a cup body can.

a) Zusammenfahren einer zweiteiligen Form, die einen Hohlraum entsprechend dem Henkel, wobei der Hohlraum an den Enden offen ist,

b) Aufbringen eines dritten Formteiles auf die zweiteilige Form, das der äußeren Form des Tassenkörpers entspricht, und das eine Zuführung für Schlicker enthält, die an dem einen Ende des Hohlraumes mündet,

c) Spannen der drei Formenteile,

d) Einpressen von Schlicker in den Hohlraum, bis an das andere Ende des Hohlraumes gegen das dritte Formteil, um den Henkel zu bilden,

e) Entspannen des dritten Formteiles,

f) Entfernen des dritten Formteiles,

g) Aufbringen von Garnierschlicker auf die beiden Enden des im Hohlraum der zweiteiligen Form gebildeten Henkels,

h) Auflegen und Spannen des Tassenkörpers auf die zweiteilige Form mit dem darin enthaltenen Henkel, um den Henkel mit dem Tassenkörper zu verbinden,

i) Einpressen von Druckluft in die zweiteilige Form, um den Henkel von der Oberfläche der zweiteiligen Form abzulösen,

j) Entspannen der zweiteiligen Form mit dem Tassenkörper,

k) Entnehmen der Tasse.

The task is solved in a process for the production of cups with prefabricated cup bodies, to which the handles are subsequently attached, with the following steps:

a) moving together a two-part shape which has a cavity corresponding to the handle, the cavity being open at the ends,

b) applying a third molded part to the two-part mold, which corresponds to the outer shape of the cup body and which contains a feed for slip which opens at one end of the cavity,

c) clamping the three mold parts,

d) pressing slip into the cavity up to the other end of the cavity against the third molded part to form the handle,

e) relaxing the third molded part,

f) removing the third molded part,

g) applying garnish slip to the two ends of the handle formed in the cavity of the two-part shape,

h) placing and tensioning the cup body on the two-part form with the handle contained therein in order to connect the handle to the cup body,

i) injecting compressed air into the two-part mold in order to detach the handle from the surface of the two-part mold,

j) relaxing the two-part shape with the cup body,

k) Remove the cup.

The handles are not with the help of this procedure as in State of the art generated individually and then with the prefabricated cup body connected, but the handle is attached to the prefabricated cup body. This eliminates Plants for prefabricating the handles, plastering, transport and like.

In the process of making cups, the Garnish slip in step g) also on the areas of Cup body are applied, which are connected to the handle should be.

The method of making cups is given another one advantageous embodiment if the cup body in the crotch h) on the two ends of the contained in the two-part form Henkels is placed so that a small distance preserved between the two-part shape and the cup body remains in which the garnish slip is either applied to the cup body or the ends of the handle becomes.

This further advantageous embodiment of the method is reached when the cup body after removing the third Molding not on the, but at a certain distance the handle is placed over the two ends. The three-part form is then advantageous for this method designed so that the two openings of the cavity for the manufacture of the handle in the two-part form together form recesses for handles with the third molded part. The cup body on which in one embodiment of the The process of applying the garnish slip is then carried out with these areas so placed on the ends of the handles that a certain distance between the handle and the cup body is retained, and it is created via the garnish slip firm bond with the cup body.

This embodiment of the invention in which a small distance is present between the cup body and the handle the advantage that the cup body finished when loosening the molded cup from the two-part shape not from that from the two-part mold is pressed out of water. This prevents slurry particles, which with the Water can be washed out of the porous plastic mold could be deposited on the cup body and the handle become.

With the help of the inventive method, a cup is created which the handle is cast on. This cup is different in basic properties of the cups known so far, to which a prefabricated handle is attached. Because the handles are cast on, there are no unclean transitions between the cup body and the handle. The handle closes flush with the surface of the cup body. There is no degree or any fault and therefore no rework required. In addition, the handle has a higher adhesive strength on the cup body than on previously known products this type could be demonstrated.

The proposed procedure ensures a high degree of Saving on devices for the production of handles, Pourers etc. for cups and jugs and thus leads to a considerable increase in productivity. Regarding the The process does not matter whether Henkel is on cup or Can body or pourer can be attached to can body.

When using these methods, in particular Manual workplaces saved in the conventional Process for plastering, attaching the handles and pourers, for rework etc. are required. There is one higher quality of the products than previously with all known technological process is achieved. The manufactured Products offer a much higher quality both with regard to the breaking strength of the retrofitted Parts as well as in the external appearance. Cups with Using the methods according to the present invention are made at the transitions between Cup body and handle no traces of manufacture.

The invention is intended below with the aid of exemplary embodiments with reference to the accompanying drawings are explained. The same reference numbers denote in the individual drawings the same parts.

Fig. 1A eine dreiteilige Form zum Anformen von Henkel an eine Tasse;

Fig. 1B bis 1E das Verfahren zum Anformen von Henkeln an eine Tasse mit einer dreiteiligen Form;

Fig. 2A einen Tassenkörper mit Garnierschlicker;

Fig. 2B einen Tassenkörper, der in einem Abstand auf den Henkel im Formteil aufgelegt ist;

Fig. 3A bis 3B Schnittansichten einer dreiteiligen Form mit Formmulden für den Henkelansatz; und

Fig. 3C ein Formteil entsprechend Fig. 3A mit darin gebildetem Henkel.

Show it:

1A shows a three-part mold for molding handles onto a cup;

1B to 1E the method for molding handles onto a cup with a three-part shape;

2A shows a cup body with garnish slip;

2B shows a cup body which is placed at a distance on the handle in the molded part;

3A to 3B are sectional views of a three-part shape with mold recesses for the handle attachment; and

3C a molded part corresponding to FIG. 3A with a handle formed therein.

1A is a three-part form with parts 1, 2 and 3 shown. Through the molded parts 1 and 2, the cavity 4 for the handle is formed and in the molded part 3 is the Slip supply 5.

In Figs. 1B to 1E are the individual steps of the Method using the three-part mold shown in Fig. 1A shown. In Fig. 1B, the tensioned three-part shape 1, 2, and 3 shown so that the cavity 4 for the handle 7th and the feed for the slip 5, which at one end of the Cavity 4 for the handle ends, can be seen.

After the three-part form 1, 2, 3 in steps a) to c) moved together and excited, the slip for the Handle 7 in step d) through the slip feeder 5 into the Molded parts 1, 2 are pressed in until the cavity 4 is complete is filled. In step e), the third molded part is relaxed and lifted off the two-part form 1, 2. On the ends of the in the cavity 4 created handle 7 is in step g), as shown in Fig. 1D, garnish slip applied and then in step h) the cup body 8 instead of the third Molded part 3 placed on the two mold parts 1 and 2, as in Fig.lE is shown. In this step, the cup body 8 under pressure with the one still in the molded parts 1 and 2 Handle 7 connected. Then in step i) with the help of Compressed air, which is pressed through the molded parts 1 and 2, the Handle detached from the surface of the two-part mold 1, 2, the mold 1, 2 is relaxed in step j) and the finished one Cup can in step k) of the two-part form 1, 2 be removed. It is not a rework afterwards required.

2A and 2B show how the garnish slip applied to the locations of the cup body 8 according to step g) is to be connected to the handle 7. FIG. 2B shows the one stretched over the two-part mold 1, 2 Cup body 8 according to step h) of the method.

3A to 3B show sectional views of a three-part shape with recesses 9 for the handle 10 and Fig. 3C the two-part form 1, 2, with the handle 7 formed therein are the handle approaches 10, as shown by the in the Mold part 3 containing mold troughs 9 are formed.

Is this formed by the three mold parts mold troughs 9th given a special shape can also be a handle 10 can be made of a complementary decorative Design of the cup forms. The formation of handles 10 avoids the usual reworking of the cups.

The formation of handles 10 is not tied to that the garnish slip applied to the cup body 8 becomes. In the same way, the garnish slip can also be applied to the both ends of the handle 7 or the mold cavity 9 applied become.

This procedure ensures a further shortening of the Processing time in the production of cups, since none Clamping the cup body 8 is required. Moreover prevents the connection point of the cup body 8 with the handle 7 comes into contact with the water when releasing the handle 7 from the two-part mold 1, 2 is pushed out. The connection point remains clean, i.e. there are no slurry particles on the Cup body 8 or deposited on the handle 7. 5B this state illustrates.

In this step, it is also indifferent whether the garnish slip on the ends of the handle 7 or on the areas of the cup body 8 which are connected to the handle 7 to be connected, is applied.

The invention was based on several embodiments explained in detail. It is obvious that the one with the Invention also proposed methods for casting Casters or other parts used on a base body can be. That means it can also be used on pitchers or jugs the handles or pourers according to the proposed procedures with the help of a two-part or three-part form be attached. Products of this type, the final allow them by using the in this description explained processes are intended to be as in the Invention included to be considered.

Claims (3)

1. Method for the manufacture of cups based on prefabricated cup bodies, to which handles are retrospectively attached, comprising the following steps:

   a) Closing of a 2-part mould (1, 2), having a cavity (4) corresponding to the handle (7), with the cavity (4) being open at the ends,

   b) Positioning of a third part of the mould (3) on the two-part mould (1, 2), corresponding to the external shape of the cup body (8), and comprising a feed unit (5) for the slip, entering to one end of the cavity (4).

   c) Clamping of the three part of the mould (1, 2, 3),

   d) Pressing slip into the cavity (4) to the other end of the cavity (4), against a third part of the mould (3), in order to form the handle (7),

   e) Release of the third part of the mould (3),

   f) Removal of the third part of the mould (3),

   g) Adding handling slip (6) to the two ends of the handle (7) formed in the cavity (4) of the two-part mould (1, 2),

   h) Positioning and clamping the cup body (8) to the two-part mould (1, 2) including the handle (7) located therein, in order to connect the handle (7) to the cup body (8),

   i) Feeding compressed air into the two-part mould (1, 2), in order to detach the handle (7) from the surface of the two-part mould (1, 2),

   j) Releasing the two-part mould (1, 2) including the cup body (8),

   k) Removing the cup.
2. Method for the manufacture of cups in accordance with Claim 1, characterised in that the handling slip (6) is applied in step g) to the areas of the cup body (8), to be connected to the handle.
3. Method for the manufacture of cups in accordance with Claims I or 2, characterised in that the cup body (8) is positioned in step h) to the two ends of the handle (7) included in the two-part mould, in order to allow maintenance of a small clearance (11) between the two-part mould (1, 2) and the cup body (8) comprising the handling slip.

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