WO2020167280A2

WO2020167280A2 - Telescope feeder production method and telescope feeder

Info

Publication number: WO2020167280A2
Application number: PCT/TR2020/050111
Authority: WO
Inventors: Muhittin GÜNDOĞDU
Original assignee: Ges Döküm Ürünleri̇ Metalurji̇ İmalat İnşaat Sanayi̇ Ve Ti̇caret Ltd. Şti̇.
Priority date: 2019-02-15
Filing date: 2020-02-14
Publication date: 2020-08-20
Also published as: WO2020167280A3; TR201902350A2

Abstract

The invention is related to the feeder sleeve, which is designed for use in casting industry, which is centered on the mold model with the help of pins, and which is pressed and compressed in sand molds.

Description

TELESCOPE FEEDER PRODUCTION METHOD AND TELESCOPE

FEEDER

Prior Art

During casting, as a result of the change of crystal structures while the metals cool, volumetrick shrinkages by and retreats (cavities) occur within the piece. To prevent these retreats, the cast part is fed with extra liquid metal. The metal that begins to cool in the mold of the part to be cast decreases in volume and requires additional liquid metal to comletely fill the mold. The feeder shirt transfers the liquid metal in its reservoir to fill the cavity formed in the mold and the casting mold is filled with sufficient amount of liquid metal. The mold feeder liners used in the casting industry today are used either with crusher covers manufactured with shell covers or with crusher covers manufactured from metal. Shell or metal caps applied on the feeder constitute an additional cost.

A feeder shirt and application form are proposed for this purpose in the patent document titled “binding material system for polyurethane-based Core-casting molds’ published in the prior art having no. 2001/01240. The feeder shirt proposed by the invention consists of plastic cover, non-fluorinated shirt and movable metal neck parts. The moving metal neck is passed into the gap in the middle of the fluoreless shirt and is still at the top and ready to be closed with a plastic cover on top of the liquid metal reservoir. It is manufactured from different exothermic materials due to its production structure and is combined before casting and works as follows: the amount of liquid metal required by the part to be cast is transferred to the moulds, the metal which has expanded in liquid form occupies more volume than its solid form. As the volume of the metal that begins to cool in the mold decreases, a gap begins to form in the mold, the liquid metal in the shirt completes this gap and the part production is completed by continuing until the part cools and turns into solid form. The feeder shirt described with the invention offers some practical use, but it causes some problems in terms of the material it contains, both in terms of production cost and environmental reasons. Polyurethane-based cover is used for feeder and this cover melts during casting. Melting polyurethane - based substance causes toxin gas to be released into the environment. In addition, the use of a separate mold for the production of plastic cover and a new plastic cover for each casting causes cost.

In the patent document titled‘a feeder shirt for use in casting of metals’, issue no.2018/06342, which is in the prior art, it is also recommended to construct a feeder shirt again. The invention is improvement in terms of reducing production costs and eliminating environmental adverse effects from the feeder structure proposed in the prior art. The parts of the feeder shirt are produced by using the same exothermic material and are applied by feeding the cast part with extra liquid metal. In addition, when the feeder parts are placed in the automatic mold machine, the feeder body is interlaced with the lower sleeve at a certain angle. If this is not observed when placing the feeder into the automatic mold machine, the whole casting process must be repeated again and it causes extra time to be wasted on workmanship. The worker places the feeder liners at pre -determined locations on the casting mold at a correct angle, not once, first the lower part, and then places the main body of the feeder shirt at a right angle to the mold in perfect alignment with the lower part. There is a risk that the worker may not be able to place the upper part at an accurate angle in a working environment where hot metal work and operations need to be carried out quickly. In this case, if the worker does not make the placement at the right angle, the feeder can be formed by breaking the shirt with the pressure made on it in an angled way and processing the mold with unwanted scattering. The burrs or currents formed in such faulty molding are then forced to be corrected with additional labor and cause loss of time and money in terms of production.

In the technique, there is still need to construct a feeder shirt suitable for practical use with minimal cost and no environmental risk.

Purpose of the Invention

This invention solves the problem by housing the crusher cover in the feeder itself without the use of additional shell or metal cover without the cost of extra crusher cover. The invention is also composed of three parts made of the same exothermic material, which gives higher heat at the point of contact to the casting part than to the non-flammable shell or metal cover, thus preventing drawbacks better than other shell or metal cover feeders. However, a perfect casting surface is obtained.

Brief Explanation of The Invention

The telescope feeder consists of at least three parts and combines all three parts and is ready to be used simultaneously in a swift manner. Besides reducing the workmanship of casting, it also provides ease for transportation and foundary transportation. It is a new generation feeder that reduces production time and workmanship, maintains high quality, compresses sand on its axis at press moment and provides a perfect surface after casting.

The invention is related to the feeder, which is designed for use in casting industry, which is centered on the mold model and pressed and compressed in sand molds, and it is characterized with a bracelet that provides the combination of the main body and the moving cylindrical end, the feeder main body that confines the liquid metal into it and ensure accumulation and the moving cylindrical end to transfer the liquid metal coming from the feeder main body.

Explanation of Figures

Figure 1: Assembled telescope feeder Figure 2: Disassembled telescope feeder

Explanation of References

NO Piece Name

1 Movable cylindrical tip

1.1 Cylindrical end channel 1.2 Cylindrical end contact surface

2 Bracelet 2.1 Bracelet grip surface

2.2 Bracelet motion limiting surface

2.3 Cylindrical end movement channel

3 Feeder main body 3.1 Main body top cover

3.2 Main body bracelet grip surface

3.3 Main body supply chamber

Explanation of The Invention

This invention solves the problem by housing the crusher cover in the feeder itself without the use of additional shell or metal cover without the cost of extra crusher cover. Since the invention consists of a piece made of the same exothermic material, it prevents the shrinkage better than other shell or metal cover feeders by giving higher heat at the point where it touches the casting part compared to the inflammable, shell or metal cover so that it provides a perfect casting surface. After the mixture of the same exothermic material is prepared, it is placed in the machine to be molded and the parts produced with the appropriate moulds are sent to the dryer oven to dry. The product which is removed from the drying oven in three parts is combined and become ready for use. Figure 1 shows the assembly of the telescope feeder; the feeder consists of the main body(3), the bracelet(2), and the movable cylindrical end(l). The top cover (3.1) of the feeder main body (3) is opened during casting and filled with sufficient liquid metal into the main body feeding chamber (3.3). As the metal in the mold cools and the volume decreases, the liquid metal moving cylindrical tip (1) in the main body feeding chamber (3.3) passes through the cylindrical end channel (1.1) and fills the gaps formed within the mold. The movable cylindrical tip (1) has down/up mobility. In this way, cylindrical tip contact surface (1.2) of the movable cylindrical tip (1) provides sufficient combination to all molds in automatic casting machines. Movable cylindrical tip (1) was used for the preferred sampling; it can be used in geometric shapes such as Square, Triangle, oval if needed and will give the same result.

In Figure 2, the telescope feeder is shown as disassembled; it consists of the movable cylindrical tip (1), the bracelet (2) and the main body (3) of the feeder. The telescope feeder provides practical and easy installation. The bracelet (2) secures the movable cylindrical tip (1) and the feeder main body (3) to each other to prevent unintentional exits. The cylindrical tip is passed through the movement channel (2.3) to the movable cylindrical tip (1) and the bracelet is attached to the movement limiting surface (2.2) and the movable cylindrical tip (1) to the piece of the bracelet (2). The ring holding surface (2.1) and the main body holding surface (3.2) are joined. With these steps, the telescope makes the feeder ready for use. Since all parts of the telescope feeder are made of the same exothermic material, when heated, the heat is uniformly equal on all sides, thus maintaining the ideal temperature of the molten metal, allowing it to reach the casting mold at the desired temperature. In this way, a smooth surface is obtained when transferred to molten metal molds that maintain their temperature and fluidity homogenously and removed from the molds in solid form.

The expressions “top”, “bottom”, “side”, “up”, “down” used in the description of the invention are used for the positioning in the figures and can not be interpreted as limiting the positioning during the use of the invention.

The expressions“a”,“one” used in the description of the invention are used to describe some example application of the invention and can not be interpreted as limiting of the invention.

In the applications described here by the examples, the joining of the bracelet to the main body can be performed by any of the methods of installation in prior art. Assembly can be done by means of auxiliary elements which may be by means of bonding elements or by means of any suitable forming.

Claims

1-A feeder sleeve, which is designed for use in casting industry, which is centered on the mold model with the help of pins, and which is pressed and compressed in sand molds, and it is comprising a bracelet ( 2) combined in a region with a main body (3), which enables a combination of the main body (3) and a moveable cylindrical end (1), and limits the movement of the cylindrical end (1) in a direction of the main body (3) and prevents it to be released from the main body (3).

2- The feeder sleeve in claim 1 comprising a moving cylindrical tip (1) to transfer liquid metal from the feeder main body (3) and said liquid metal from the feeder main body(3) to the molds.

3- A feeder sleeve, which is designed for use in casting industry, which is centered on the mold model and pressed and compressed in sand molds, and it is comprising a movable cylindrical end (1), a bracelet (2) and a feeder main body (3) are made of the same exothermic material.

4- A method for producing a feeder sleeve for use in the casting industry and it is comprising:

• Shaping of bracelet (2), movable cylindrical tip (1) and feeder main body (3)

· Placement of the movable cylindrical end (1) through the cylindrical end movement channel (2.3) located on the bracelet (2)

• Ensuring that the bracelet (2) grips into the main body of the feeder (3) from the joint surface