JPS6033549B2 - Mold release agent treatment method - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a mold release agent treatment method, which recovers a mold release agent that is sprayed onto the mold surface of a mold in metal casting, die casting, etc. to improve the moldability of the product. Concerning things that can be reused.

When casting, such as mold casting or die casting, a mold release agent solution is sprayed onto the mold to apply it, but in this case, the excess solution flows out from the mold and
Most of the waste is discharged as factory waste.

However, this method of treatment has problems such as the release agent solution contaminates the environment, causing pollution problems, and is uneconomical.

The present invention was made in view of the above points, and it is possible to recover the solution of the mold release agent sprayed onto the mold, set it to a predetermined concentration that allows it to be sprayed onto the mold, and make it possible to reuse it. The purpose is to prevent the occurrence of pollution problems and to make it possible to use mold release agents economically.

In the method of the present invention, a mold release agent solution injected onto a mold is collected and introduced into a separation tank, and impurities such as oil are separated and removed from the solution in this separation tank, and the solution is passed through a coarse filter. After passing through the furnace, it is introduced into a storage tank,
The concentration of the solution in this storage tank is measured, a diluted solution or a stock solution is added to set the solution to a predetermined concentration, and this solution is injected into the mold. Next, one embodiment of the present invention will be described with reference to the accompanying drawings.
In the figure, 1 is a casting section, and this casting section 1 is provided with a die 4 consisting of a fixed die 2 and a movable die 3. The movable die 3 is a die consisting of a cylinder, a pump, piping, etc. It is moved forward and backward relative to the fixed mold 2 by a movable mechanism 5, and the respective mold surfaces 6 and 7 form a cavity during mold matching.

Further, in the casting section 1, a recovery tank 8 is provided below the mold 4 and the mold movable mechanism 5.

Next, a recess 9 is formed at the bottom of the collection waste 8, and a uniform portion of a transport path 10 is conveyed through the recess 9, and a first recess serving as a separation waste is formed at the end of the transport path 10. The separation tank 11 is filled with water.

Inside this first separation tank 11, there are a plurality of partition walls 12, 13 whose heights are gradually lowered in the flow direction at predetermined intervals.
are erected on the bottom plate 14, and discharge passages 17, 18 are formed by guide plates 15, 16 whose lower ends are connected to one side of each of the partition walls 12, 13, respectively.
Overflow outlet portions 17a and 18a are provided at the upper end of 8.
is bent in the flow direction. Moreover, at the upper end between each of the partition walls 12 and 13, that is, each of the discharge ports 1
Discharge passages 20, 21, 22 for discharging floating impurities such as oil are formed at positions approximately at the same height as positions 7a, 18a, and these discharge passages 20, 21, 22 are connected to conductive passages 23, 24.
, 25 to an exhaust gas treatment tank 26. Further, a pump 27 is provided in a portion of the first separation tank 11 having the discharge path 11, and a conduit 28 connected to the pump 27 is provided.
A second separation tank 29 serving as a separation tank is conveyed to the first separation tank 11 via the first separation tank 11 . Inside this second separation tank 29, a plurality of partition plates 30, 31 are arranged at predetermined intervals on the bottom plate 3.
Discharge passages 35 and 36 are formed by guide plates 33 and 34, respectively, which are installed upright on the partition walls 30 and 31 and whose lower ends are closed at one side of each of the partition walls 30 and 31. Exhaust ports 35a and 36a for overflow are formed. In addition, discharge passages 37 and 38 for discharging floating impurities 19 such as oil are formed at the upper part between the partition walls 30 and 31, that is, at substantially the same height as the positions of the discharge ports 35a and 36a, These discharge passages 37 and 38 are returned to the first separation section of the first separation tank 11 via a transportation passage 39 for reprocessing. Next, a supporting frame 40 is protruded from the upper outer side wall of the second separation tank 29 in the flow direction, and a plurality of filters 41 made of, for example, sponge are stacked vertically on this supporting frame 40 and can be attached and removed. Can be installed freely.

Each of the filters 41 disposed above and below has a mesh that becomes gradually thinner toward the bottom. As the filter 41, porous refractories, porous metal plates, sponges, furnace paper, etc. are used. Next, a storage adjustment tank 4 is located below the filter 41 and serves as a storage tank.
2 is provided.

A measuring device for determining the concentration of the solution is provided in this storage adjustment tank 42 , and a relay 45 is connected to a concentration meter 44 connected to this measuring device 43 . A pump 46 serving as a stock solution supply device for supplying stock solution or diluted solution is connected via a conductor 47, and this pump 46 is provided in a stock solution tank 48 and a conduit connected to this pump 46. 49 discharge ports 50 are closed facing the storage adjustment tank 42.
Further, a pump 51 is provided within the storage adjustment tank 42, and a solution tank 53 is connected to this pump 51 via a conduit 52. A release agent stock solution tank 54 and a diluted solution tank 55 are provided in this solution tank 53, and a conduit 56 for introducing a diluted solution is connected to this diluted solution tank 55.
6, the stock solution tank 54 is transported through a valve 57 and a conduit 58. The undiluted solution in the undiluted solution tank 54 is automatically diluted at a predetermined ratio in the diluted solution tank 55, and the discharge pipe 59 is connected to the solution tank 53 as a solution a of the rock molding agent. The liquid is sprayed into the mold 4 from a nozzle 60 attached to the tip of the metal mold 4. In this structure, a stock solution of a water-soluble emulsion type template agent for aluminum and zinc die casting is diluted to a predetermined concentration with dilution water in the solution tank 53, and this solution a Driven by the means, the liquid is pumped through the discharge pipe 59, and is injected from the nozzle 60 at the tip onto the mold surfaces 6, 7 of the mold 4, that is, the fixed mold 2 and the movable mold 3. A template film b made of solution a is formed on 7.

Next, the excess solution a sprayed onto the mold surfaces 6 and 7 is collected from the mold 4 into a collection tank 8, and cooling water for the mold 4 and mold movable mechanism 5 are collected in the collection tank 8. Impurities c such as hydraulic oil, chips and lubricating oil are recovered.

The solution a containing impurities c collected in the collection tank 8 is introduced into the first separation section of the first separation tank 11 through one transportation path, and is sequentially introduced from each discharge path 17, 18. It is overflowed and flows into the final separation section. At this time, each discharge path 17, 18 is provided in the first separation tank 11.
Since the discharge passages 20, 21, and 22 are formed at a height such that they overflow in each separation section, impurities c such as oil floating in the solution a that sequentially flows into the discharge passage 20.
, 21, 22 and is separated and removed from solution a, and is captured and treated in a waste treatment tank 26 via conduction paths 23, 24, 25. Then, by driving the pump 27, the solution a from which impurities c have been separated in the first separation tank 11 is introduced into the first separation section of the second separation tank 29 via the conduit 28, and each discharge The water is sequentially overflowed from channels 35 and 36 and flows into the final separating section.

At this time, impurities c such as oil floating in the solution a that sequentially flows in are sequentially overflowed into the discharge passages 37 and 38 and are further separated and removed from the solution a. The waste is returned to the separation tank 11 and sequentially captured and processed in the waste treatment tank 26. Next, the solution a overflows from the second separation tank 29 and enters the filter tank 4.
1 and further filtered by this filter 41 to remove dust, oil, lees, carbon, etc., and then introduced into the storage adjustment tank 42.

In this storage adjustment tank 42, the concentration of solution a is measured by a measuring device 43, and this measured concentration is displayed on a concentration meter 44. However, if the concentration of solution a is less than a predetermined concentration, When the relay 45 is excited, the pump 46 is driven, and the pump 46 automatically supplies the stock solution or diluted solution of the model agent in the stock solution tank 48 into the storage adjustment tank 42 through the conduit 49, The solution a is supplied until the concentration reaches a predetermined concentration equal to the concentration of the solution a in the solution tank 53.

When the solution a reaches a predetermined concentration, it is measured by the measuring device 43 and displayed on the concentration meter 44, and the relay 45 is de-energized and the operation of the pump 46 is stopped.

Next, when the pump 51 provided in the storage adjustment tank 42 is driven, the adjusted solution a is returned to the solution tank 53 via the conduit 52 and is reused.

In the above case, the concentration of the template agent solution can be freely set depending on the casting product.

Also, since the filter 41 is removably attached,
Cleaning is easy, and if the material is made of refractories or porous metal plates, it is best to burn it, or if it is made of foam or paper, it is best to incinerate it in an incineration path.

According to the present invention, a solution of a mold release agent injected onto a mold is recovered and purified by removing impurities such as hydraulic oil from the solution in a separation tank, and the concentration of this solution is changed to a solution injected into a mold. By injecting the template agent into the mold at a concentration equivalent to that of the template agent, the template agent is circulated and consumed in the necessary amount that adheres to the mold, and can be consumed effectively as a whole without waste, which is economical.

Furthermore, since it is not immediately discharged as factory waste after being injected into the mold, it does not cause pollution problems such as contaminating the environment, and post-treatment is easy, so it greatly contributes to productivity. Furthermore, by collecting the solution injected into the mold and sequentially applying it to a separation tank and a filter, impurities such as oil mixed in the solution are successively separated and removed, and therefore the solution can be reliably purified.

In addition, if the purified solution does not reach a predetermined concentration, the stock solution or diluted solution is automatically added to it and the concentration is set to the predetermined concentration, ensuring reliable solution concentration control and ensuring that the solution has an appropriate concentration. It can be fully reused.

[Brief explanation of the drawing]

The figure is an explanatory view showing one embodiment of an apparatus for carrying out the mold release agent method of the present invention. 4... Mold, 11, 29... Separation tank, 26... Waste treatment tank, 41... Filter tank, 42... Storage adjustment tank, 4
3...Measurement counterfeit, 46...Pump as stock solution supply device, a... Solution of mold release agent.

Claims (1)

[Claims] 1 The mold release agent solution injected into the mold is collected and introduced into a separation tank, and impurities such as oil are separated and removed from the solution in this separation tank, and the solution is further filtered through a filter. The solution is introduced into a storage tank, the concentration of the solution in this storage tank is measured, and a diluted solution or stock solution is added to set the solution to a predetermined concentration, and this solution is injected into the mold. Characteristic mold release agent treatment method.