JPS5823471Y2 - Mold drying equipment - Google Patents

Description

[Detailed description of the invention] This invention relates to a mold drying device, which uses hot air circulation to dry the moisture in the coating agent applied to the mold surface.
The purpose is to promote drying efficiency and to smoothen the flow of the mold making equipment line by using one of the mold making equipment as a constituent member of the drying furnace itself.

For example, Patent No. 963712 (Special Publication No. 53-42286
As presented by the applicant in No.

When forming a mold for a steel ingot, a skid-like support consisting of a mounting part and legs is supported on a bogie that runs on a track, and a core is assembled onto the lower mold on the skid supported by this bogie. On the other hand, a main mold is painted and molded on a trolley that can run on another track, and this main mold is placed on the lower mold, and then temporarily assembled, dried and molded on the skid. Techniques for performing assembly operations are known.

In addition, it is well known that a self-hardening resin binder is added to molding sand in casting, and the coating agent applied to the mold surface is dried until the residual moisture content is 0.2% or less. There is a need.

Conventionally, a single batch type drying oven has been used, but not only does the lack of air circulation cause the interior of the oven to become overheated, which has a negative effect, but the hot air is also concentrated at the top of the oven. The entire mold could not be dried evenly.

This invention uses a hot air circulation system and charges the hot air from the bottom of the furnace upwards, thereby improving uniform drying of the entire mold and improving efficiency.

A specific example of the present invention will be described in detail with reference to the drawings.

In FIGS. 1 to 3, reference numeral 1 denotes a track, and a bogie 2 on this track 1 can freely travel back and forth.

The truck 2 is equipped with wheels 3 consisting of a driven wheel and a driving wheel, as shown in FIGS. 5 and 6, and the truck body has a pair of lifting members 5 that are movable up and down by a hydraulic cylinder device 4.

A plurality of skids 6 are arranged in parallel on the track 1.

This skid 6 consists of a mounting section 7 and leg sections 8.

As shown in FIG.
When the platform 7 is lifted by the lifting member 5 of the trolley 2, the legs 8 are lifted off the ground as shown in FIG. If the lifting member 5 is lowered, the legs 8 will touch the ground as shown in FIG. 6(2), and the bogie 2 can run independently.

9 is the drying oven installed at the drying station.

It consists of a furnace top wall 10 and a pair of left and right furnace side walls 11.

It is set up to straddle track 1.

Reference numeral 12 denotes a furnace support frame structure that supports the drying furnace 9 in order to create a space 13 at the bottom of the drying furnace 9. By creating the space 13, the cylinder device 4, which is the drive source of the bogie 2, etc. can be dried. Protected from temperature range.

Reference numeral 14 denotes an opening/closing door, which is provided at the entrance/exit of the furnace 9 as a double door in the figure to be opened and closed by an air cylinder device, but the structure of the door 14 is free.

As shown in FIG. 3, once a mold 15 is formed on a skid 6, it is stored in a drying oven 9 for drying.

This is housed in the truck 2, and as shown in the figure, three skids 6 are housed in the furnace 9, and each skid 6 supports a mold 15 separately.

When a plurality of skids 6 carrying molds 15 are loaded into the furnace 9, the bottom of the furnace 9 is defined by the mounting portion 7 of the skids 6, as shown in FIGS. 1 and 3. Since the skid 6 is transported by the cart 2, a gap is required between each mounting portion 7 and the furnace side wall 11.

A pair of sealing members 16 for sealing this gap are provided on the furnace side wall 11, and this sealing member 1
6 is continuously supported by a support fitting 17 along the longitudinal direction of the furnace.

As particularly shown in FIG. 4, the sealing member 16 is attached to the support fitting 17 with bolts (not shown), but it is preferable that the sealing member 16 is provided so as to be adjustable in the direction across the furnace.

That is, when the skid 6 is lifted by the lifting member 5 of the one truck 2, the lower surface 7a of the mounting portion 7 is located at a higher level than the seal member 16, and when the skid 6 is lowered and the legs 8 touch the ground, the lower surface 7a is higher than the seal member 16.
a is connected to and supported by the seal member 16 as shown in FIG.

Therefore. The sealing member 16 is preferably made of a heat resistant flexible elastic material.

Reference numeral 18 denotes an auxiliary sealing member, which is bendably provided on the mounting portion 7 of the skids 6, and is used to seal the joints between the skids 6 when a plurality of skids 6 are arranged in parallel in the furnace 9.

Therefore, this auxiliary seal member 18 is not necessary if the skids 6 are closely arranged in parallel so that no joints occur between the skids 6.

A hot air introduction duct 19 communicates with a branch duct 20 downward from the furnace top wall 10, and a pair of nozzle ducts 21 are provided at the bottom along the furnace side wall 11.

The pair of nozzle ducts 21 are provided with a number of injection nozzles 22 corresponding to the number of molds 15 charged in the furnace.

As shown in FIG. 3, this nozzle 22 projects toward the lower part of the mold 15 slightly above the mounting portion 7 of the skid 6.

Reference numeral 23 denotes an air exhaust duct, which is provided along the longitudinal direction of the furnace top wall 10 and has an axial fan or other forced suction type air exhaust member 24 above a location corresponding to each nozzle 22 .

In addition, reference numeral 25 denotes an exhaust slitner provided in the upper plenum 26 in correspondence with the exhaust member 24.

Therefore, according to the present invention configured as described above, when the mold 15 is manufactured on the skid 6 at an assembly station (not shown), the skid 6 is lifted and transported via the cart 2 and placed in the drying oven. For example, three carts 2 are stored in the drying furnace 9, and one cart 2 is allowed to run on the track IK outside the drying oven 9, and the opening/closing door 14 at the entrance/exit is closed.

Then, the mold 15 is attached to the furnace top wall 10. It is loaded into a furnace surrounded by the furnace side wall 11 and the mounting part 7 of each skid 6, and the gap between the skid 6 and each side wall 11 is sealed with a sealing member 16, so that the inside of the furnace is completely sealed. It becomes a closed room.

In this state, if the injection nozzle 22 also charges hot air and the exhaust member 24 is driven, the charged hot air is circulated from the lower area to the upper area of the mold 15, and is dried during this circulation process. .

In particular, since the hot air is raised from the bottom of the mold 15, the entire area of the mold 15 is heated and dried evenly, and since the interior of the mold 15 is sealed, efficient drying without leakage of hot air is ensured.

For example, if you dry it for about 1 hour. The moisture content of the mold coating agent is, for example, 0.2% or less.

After the drying is completed, the door 14 is opened and the mold 15 on the skid 6 is transported to the next station via the cart 2 again.

The present invention is as described above, and it achieves the intended purpose effectively and reliably, and is of great practical benefit.

[Brief explanation of the drawing]

The figures show an example of the present invention; FIG. 1 is a side view, FIG. 2 is a plan view, FIG. 3 is a front view, FIG. 4 is an enlarged sectional view of the sealing part, and FIG. 5 is a perspective view of the trolley. FIGS. 6(1) and 6(2) are front views showing the movement of the truck and skid. 1... Track, 2... Trolley, 6...
...Skid. 7... Placement section, 8... Legs, 9...
... Drying oven, 10... Furnace top wall, 11...
・Furnace side wall, 14...Opening/closing door, 15...
Mold, 16... Seal member, 22...
Injection nozzle 24...Exhaust member.

Claims (1)

[Scope of utility model registration request] A pair of skids capable of accommodating a plurality of skids together with the molds in an apparatus for drying a plurality of molds placed on the skids, in which a skid having a mounting part and a leg part is moved in and out of a drying furnace by a cart running on a track. A drying oven consisting of a side wall and a top wall is installed across the track, and an opening/closing door is provided at the entrance and exit of the oven. A sealing member is provided between the skid mounting portion and the furnace side wall, a pair of hot air charging nozzles are provided on the furnace side wall slightly above the skid mounting portion, and a forced suction type nozzle is provided at the top of the furnace. A mold drying device characterized by comprising an air exhaust member.