JP2014205152A - Method and apparatus for release agent application in high-pressure casting - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the service factor of a retreated liquid by utilizing the retreated liquid efficiently without introduction of an expensive high-grade release agent regeneration system.SOLUTION: A molding surface 1a of a fixed mold 1 constitutes a high-quality part A for molding the surface of a product requiring high appearance quality and is applied, from a spray nozzle device 16, with only a fresh liquid delivered from a fresh liquid tank 9 through piping 15 dedicated to the fresh liquid. The molding surface 2a of the movable mold 2 constitutes non-high-quality part B for molding parts usually requiring not so high appearance quality and is applied with a release agent from retreated liquid piping 12 and a hose nozzle device 13. The retreated liquid piping 12 is connected to the retreated liquid tank 8 and the fresh liquid tank 9 through a valve 11 and supplies one of three types of release agents consisting of the fresh liquid, the retreated liquid or their mixture selectively to the retreated liquid piping 12 by the valve 11.

Description

The present invention relates to a method and an apparatus for applying a release agent to a mold performed at the time of high-pressure casting, and more particularly to a method in which a release agent recovered and reprocessed can be efficiently reused.

When performing high pressure casting of metal, for example, aluminum die casting, generally, a release agent is applied to fixed and movable mold surfaces to facilitate removal of the molded product.
By the way, in recent years, from the viewpoint of environmental protection, it is required to reduce the amount of factory waste liquid disposed of. As a processing technology related to the reuse of this release agent, the release agent applied to the mold is collected and reprocessed to form a reprocess release agent (hereinafter referred to as reprocessing liquid), which is recycled and reused. There is.
In addition, at the initial stage of recovering the mold release agent, it is reprocessed with minimal mixing of hydraulic oil and lubricating oil, so that the reuse rate of the mold release agent is increased as an advanced reprocessing liquid. There is also an agent regeneration system (see Patent Document 1).

FIG. 4 is a flow chart of a release agent circulation reuse system that is also employed in the above-described conventional example. In this figure, reference numerals 1 and 2 denote a fixed type and a movable type, and the sprayed release agent falls and collects in the drain pan 3 and accumulates in the used release agent recovery / sedimentation tank 4 through the pipes to cause burrs and impurities. Further, the oil component that can be removed is separated in the surface oil separation tank 5, and the concentration of the release agent stock solution 7 is appropriately adjusted in the reprocessing liquid tank 8 to adjust the concentration. On the other hand, a new release agent liquid prepared by mixing the clean water 6 and the release agent stock solution 7 is prepared and stored in the new liquid tank 9.

The reprocessing liquid in the reprocessing liquid tank 8 or the new liquid in the new liquid tank 9 is selected and reopened by switching the valve 11 by the control device 10 and driving and controlling the pump (not shown). It is sent to the processing liquid pipe 12. The valve 11 is connected to the reprocessing liquid tank 8 via the reprocessing liquid branch pipe 8a, and is connected to the new liquid tank 9 via the new liquid branch pipe 9a.
The selected release agent (new liquid or reprocessing liquid or a mixture of both) is sent to the hose nozzle device 13 through the reprocessing liquid piping 12 and applied to the molding surfaces of the fixed mold 1 and the movable mold 2 from here. Is done.
The release agent dropped from both molds after application is collected in the drain pan 3 and collected, and then reprocessed.
Further, both molds coated with a release agent are closed, and high pressure casting is performed by pouring a casting material into the mold cavity.

When applying the release agent, the control device 10 switches the valve 11 according to the quality of the release agent required on the molding surface 1a of the fixed mold 1 and the molding surface 2a of the movable mold 2.
That is, in general, the new liquid needs to be applied to the molding surface 1a of the fixed mold 1 that forms the product surface, and the reprocessing liquid is applied to the molding surface 2a of the movable mold 2 that forms the back surface of the product. Is suitable.

Therefore, when the molding surface 1a of the fixed mold 1 forms a product surface that requires high appearance quality, a high-purity mold release agent is required. Is supplied from the new liquid tank 9 to the hose nozzle device 13 through the new liquid branch pipe 9a and applied to the molding surfaces 1a and 2a of the mold.

On the other hand, when the molding surface 1a of the fixed mold 1 forms a product surface that does not require a very high appearance quality, the control device 10 adjusts the valve 11 so that only the reprocessing liquid or the mixed liquid is supplied to the hose nozzle device. 13 is applied to the molding surfaces 1a and 2a of the mold. The selection of the reprocessing liquid alone or the mixed liquid depends on the degree of appearance quality required on the product surface.

At this time, when only the reprocessing liquid is supplied, only the reprocessing liquid is supplied from the reprocessing liquid tank 8 to the hose nozzle device 13 through the reprocessing liquid branch pipe 8a. In the case of a mixed liquid, the reprocessing liquid and the new liquid are mixed at a predetermined ratio by the valve 11 from the reprocessing liquid tank 8 and the new liquid tank 9 through the reprocessing liquid branch pipe 8a and the new liquid branch pipe 9a, respectively. It is supplied to the nozzle device 13.

Japanese Patent No. 4202834

In the circulation and reuse flow of the reprocessing liquid in the above conventional example, the new liquid and the reprocessing liquid can be selected and used, but the actual situation inevitably increases the use of the new liquid, and there is an opportunity to use the reprocessing liquid. It tends to decrease. That is, it is difficult to completely remove impurities such as water-soluble hydraulic fluid (water glycol hydraulic fluid) from the reprocessing liquid processed by the existing regenerator.
For this reason, even if the purity is increased by adding a release agent stock solution to the reprocessing liquid and adjusting the concentration, impurities such as remaining water-soluble hydraulic oil may cause the color and appearance of the casting surface. In some cases, it is difficult to use for parts that require high appearance quality.

On the other hand, for the mold, since uniform coating is applied to the molding surfaces 1a and 2a of the fixed mold 1 and the movable mold 2 by the common hose nozzle device 13, a high appearance quality is required on the product surface of one product. When a portion to be formed (portion formed by the molding surface 1a) and a portion not so high in quality (portion formed by the molding surface 2a) are mixed, it is a portion that forms the highest required appearance quality. Only the new liquid must be used according to the molding surface 1a.
As a result, the opportunities for using the reprocessing liquid are limited, and as a result, the reprocessing liquid that is not used for a long period of time may be discarded without being used. Therefore, it is desired to increase the use efficiency by increasing the use opportunities of the reprocessing liquid.

As one method for this purpose, there is introduction of an advanced mold release agent regeneration system as disclosed in Patent Document 1. In order to collect the release agent dripping from the mold, this system is equipped with a special dedicated collection device that replaces the drain pan 3 in FIG. 4, and drops and collects after the release agent is applied to the mold. This is an effective means for minimizing the mixing of hydraulic oil and lubricating oil at the initial stage, and a high-purity reprocessing liquid that can be easily reused can be created. Therefore, according to this system, the use opportunity can be increased by removing impurities as much as possible to obtain a high-purity reprocessing liquid.
However, since it is necessary to provide a dedicated collection device when introducing this system, it is necessary to relocate existing facilities and to carry out construction, resulting in a large cost. As a result, it is also desirable to avoid the introduction of such expensive systems.

Therefore, an object of the present invention is to make it possible to efficiently use the reprocessing liquid without introducing an expensive advanced mold release agent regeneration system.

In order to achieve the above object, the invention of claim 1 relating to the release agent coating method in high pressure casting of the present application is a new release agent that is not used when a release agent is applied to a mold used for high pressure casting. In the method of using the reprocessing liquid that has been collected and reprocessed together with the liquid,
For the mold release agent application part of the mold (1, 2), it is divided into a new liquid limited part that applies only the new liquid and a non-limited part that can be used for the reprocessing liquid without being limited to the new liquid,
It is characterized in that the use of the new liquid and the reprocessing liquid is properly used according to the new liquid limited part and the non-limited part.

The invention of claim 2 is the high-quality part (A) in the above-mentioned claim 1, wherein the new liquid limited part is a high quality part (A) that forms a part that is required to have high appearance quality in at least a part of the product surface.
The non-limited portion is a non-high quality portion (B) that forms a portion that does not require high appearance quality as high as the new liquid limited portion in normal times.

The invention of claim 3 is the above-mentioned claim 2, wherein only the new liquid is applied to the high quality part (A),
The non-high quality part (B) is characterized in that any one of three types of release agents composed of the new liquid, the reprocessing liquid, or a mixed liquid of the new liquid and the reprocessing liquid is selectively used.

The invention of claim 4 is the above-mentioned claim 2 or 3, wherein the high-quality part (A) is coated with the new liquid in the form of a mist,
The non-high quality part (B) is characterized by applying a release agent for droplets larger than fog.

The invention of claim 5 relating to the release agent coating apparatus in the high pressure casting according to the present application, together with a new liquid of the release agent that is unused when applying the release agent to the mold (1, 2) used for high pressure casting. In an apparatus using a reprocessing liquid obtained by reprocessing a release agent that has already been applied,
The mold (1, 2) is a high quality part (A) that forms a part that is required to have high appearance quality on at least a part of the product surface;
A non-high quality part (B) that forms a part that is not required to have a high appearance quality as high as the high quality part (A) at a normal time,
Only the new liquid is applied to the high quality part (A) through the new liquid dedicated pipe (15) for supplying only the new liquid,
While applying a release agent to the non-high quality part (B) through a reprocessing liquid pipe (12) configured to be able to supply the reprocessing liquid,
The new liquid dedicated pipe (15) and the reprocessing liquid pipe (12) are provided independently.

According to a sixth aspect of the present invention, in the fifth aspect, the reprocessing liquid pipe (12) is connected to the reprocessing liquid tank (8) and the new liquid tank (9) via a valve (11). By switching the valve (11), the release agent sent to the reprocessing liquid pipe (12) can be selected from a new liquid, a reprocessing liquid, or a mixture thereof. .

A seventh aspect of the invention is characterized in that, in the sixth aspect, the valve (11) is capable of adjusting a mixing ratio of the new liquid and the reprocessing liquid when the mixed liquid is adjusted.

According to an eighth aspect of the present invention, in the above-mentioned sixth or seventh aspect, the new liquid pipe connected to the new liquid tank (9) is a new liquid branch connecting the new liquid tank (9) and the valve (11). A pipe (9a) and the new liquid dedicated pipe (15) are provided, and two new liquid branch pipes (9a) and a new liquid dedicated pipe (15) are provided for one new liquid tank (9). It is characterized by being installed.

The invention of a ninth aspect is the invention according to any one of the fifth to eighth aspects, wherein the new liquid dedicated pipe (15) is connected to a spray nozzle device (16), and the spray nozzle device (16) is connected to the high quality section. Applying the new liquid in a mist toward (A),
The reprocessing liquid pipe (12) is connected to a hose nozzle (13) having a larger discharge amount than the spray nozzle device (16), and the hose nozzle (13) is directed toward the non-high quality portion (B). A release agent comprising the reprocessing liquid, a new liquid or a mixture thereof is applied.

According to a tenth aspect of the present invention, in the ninth aspect, the high quality part (A) is formed on the molding surface (1a) of the fixed mold (1), and the non-high quality part (B) is formed of the movable mold (2). It is formed on the molding surface (2a).

According to an eleventh aspect of the present invention, in the above tenth aspect, the molding surface (1a) of the fixed mold (1) is provided with the high quality part (A) and the non-high quality part (B). The high quality part (B) is coated with a release agent comprising the reprocessing liquid, new liquid or a mixture thereof.

According to a twelfth aspect of the present invention, in the eleventh aspect, the hose nozzle (13) includes a movable part (20) that changes the application direction at least in part, and the movable part (20) is provided in the fixed mold (1). A release agent is applied to the non-high quality part (B).

According to the invention of claim 1, paying attention to the fact that the purity of the mold release agent required for the mold is different for each part, the mold release agent application part of the mold is not limited to the new liquid limited part. The new liquid and the reprocessing liquid are used separately according to the new liquid limited part and the non-limited part. In addition, it is possible to apply the new liquid only to the new liquid limited portion that is a part of the mold and use the reprocessing liquid for the non-limited portion that is the other portion. For this reason, it is possible to simultaneously use the new liquid and the reprocessing liquid in one casting operation (one shot), and the reprocessing liquid can be efficiently recycled.

In addition, the reprocessing liquid can be used efficiently without introducing an advanced release agent reuse system, so the introduction of an expensive advanced release agent reuse system can be avoided and costs can be reduced. Can do.
As a result, the amount of waste liquid treated can be reduced to reduce the environmental load, and the effect can be improved as an environmental measure.

According to the invention of claim 2, a high quality part that forms a part that is required to have high appearance quality, which is at least a part of the product surface, of the mold is defined as a new liquid limited part, and usually high appearance quality is required. Since the non-high quality part that forms the part that cannot be formed is the non-limited part, it is possible to apply the new liquid only to the high quality part and use the reprocessing liquid for the other parts.
For this reason, according to the external appearance quality of a product, a new liquid and a reprocessing liquid can be properly used properly.

According to the invention of claim 3, only the new liquid is applied to the high quality part, and the non-high quality part is provided with three kinds of liquids composed of a new liquid, a reprocessing liquid, or a mixed liquid of the new liquid and the reprocessing liquid. Since any one of the release agents is used for application, the non-high quality portion can be dealt with finely and appropriately according to the purity of the release agent actually required.

According to the invention of claim 4, the new liquid is applied to the high quality part in the form of a mist, and the non-high quality part is applied with a release agent of droplets larger than the mist. As a result, the amount of use can be reduced to the minimum necessary, enabling cost reduction.

According to the invention of claim 5, a new liquid dedicated pipe that supplies only a new liquid to a high quality part that forms a part that requires high appearance quality, and a reprocessing liquid pipe that supplies a release agent to a non-high quality part Are provided independently, so that only the new liquid dedicated pipe and the reprocessed liquid pipe are added to the existing part including the reprocessed liquid pipe. A release agent application apparatus having two release agent application units can be easily configured.
In addition, since the introduction of an expensive advanced mold release agent reuse system can be avoided, the cost can be suppressed.

According to the invention of claim 6, by switching the valve, the release agent to be sent to the reprocessing liquid pipe can be selected from the three types of new liquid, reprocessing liquid, or a mixture thereof. Therefore, even the non-high quality part can be dealt with finely and appropriately according to the purity of the release agent actually required.

According to the invention of claim 7, since the valve can adjust the mixing ratio of the new liquid and the reprocessing liquid, the purity of the release agent with respect to the non-high quality portion can be more finely and appropriately dealt with. .

According to the invention of claim 8, since two new liquid branch pipes and a new liquid dedicated pipe connected to the reprocessing liquid pipe are installed for one new liquid tank, two new liquid pipes are provided. However, the number of new liquid tanks can be reduced, and the structure of the apparatus can be simplified and the cost increase can be suppressed.

According to the ninth aspect of the present invention, since the new liquid dedicated pipe is connected to the spray nozzle device, the new liquid can be applied in a small amount in the form of a mist from the spray nozzle device toward the high quality part. For this reason, it is possible to prevent liquid sag in the high quality part and to reduce the amount of new liquid that is relatively expensive to reduce the cost.
In addition, since the reprocessing liquid piping is connected to the hose nozzle, a large amount of relatively inexpensive reprocessing liquid can be applied from the hose nozzle to the non-high quality part, and the cost can be reduced. A coolant effect can be expected.

According to the invention of claim 10, the high quality part is formed on the molding surface of the fixed mold and the non-high quality part is formed on the molding surface of the movable mold. The treatment liquid piping can be arranged and separated on the movable mold side, and the piping structure can be simplified.

According to the invention of claim 11, the molding surface of the fixed mold is provided with a high quality portion and a non-high quality portion, and the non-high quality portion includes a reprocessing liquid or a mixed liquid of the reprocessing liquid and the new liquid. Thus, a portion having a different required purity of the release agent can be set on the molding surface of the fixed mold, and an appropriate release agent can be applied according to the required purity. For this reason, the usage-amount of a new liquid can further be suppressed and the use efficiency of a reprocessing liquid can be made higher.

According to the twelfth aspect of the present invention, at least a part of the hose nozzle is movable, and the movable part is applied toward the non-high quality part of the fixed mold. It is not necessary to increase the number of new release agent pipes for the quality section, and the apparatus can be simplified.

Flow chart of circulation reuse system according to the embodiment The figure which shows the molding surface of the movable mold | type which concerns on another embodiment The figure which shows the state which apply | coats the movable non-high quality part in the said embodiment with a movable part. Flow diagram of circulation reuse system in conventional example

Hereinafter, an embodiment to which the present invention is applied will be described with reference to FIG. In addition, FIG. 1 is a flowchart regarding the recirculation reuse system of the release agent similar to the conventional example of FIG. 4, and the new liquid dedicated pipe and its related parts are added to the existing parts 1 to 13 in FIG. 4. It is additionally provided. Therefore, common parts with FIG. 4 are denoted by common reference numerals, and different parts are mainly described, and redundant description is omitted in principle.

This release agent circulation reuse system is used, for example, for casting of a motorcycle engine by aluminum die casting which is high pressure casting.
The molding surface 1a of the fixed mold 1 is a part that forms the appearance surface of the product, that is, the product surface, and is a smooth surface with relatively few irregularities. The surface of the product is a part that requires high appearance quality, and the molding surface 1a forming this part has a high quality part A, and the mold release agent used in this part is of high purity, that is, a new liquid is required. This also corresponds to the new liquid limited part in the present application.
Further, the release agent is required to be applied in a small amount in order to prevent deterioration of the appearance quality of the product surface due to liquid dripping. However, the release agent used for this part is not required to have a coolant effect (cooling effect).

The molding surface 2a of the movable mold 2 is a part that forms the back surface of the product, and usually forms a non-high quality part B that forms a part that is not required to have a higher appearance quality as the fixed mold 1 side. In addition, this part is a part that normally uses the reprocessing liquid or a mixture of the reprocessing liquid and the new liquid, and does not require the use of only the new liquid, and therefore corresponds to a non-limiting part in the present application.
Furthermore, because the movable mold 2 side has a complicated mold surface with relatively large irregularities due to the characteristics of the mold, a coolant that directly cools the mold side with the mold release agent by applying a large amount of the mold release agent. This is the part where the effect is required.
That is, in general, a cooling structure comprising cooling pipes or the like is provided inside the mold to cool the mold surface, but if there are large irregularities on the mold surface, the cooling pipe or the like is extended to the tip of the convex part. Since it cannot install, a convex part becomes difficult to be cooled. As a result, it is necessary to cool the convex portions by applying a large amount of release agent. In addition, by providing a cooling structure, it is possible to replace the cooling structure or complement the cooling performance to prevent the mold from becoming complicated or to prevent strength reduction due to the thin mold surface. Therefore, it is necessary to cool by applying a large amount of release agent.

In this example, the reprocessing liquid pipe 12 and the hose nozzle device 13 are provided exclusively for the movable mold 2. Note that the reprocessing liquid pipe 12 is not dedicated to the reprocessing liquid, and only the new liquid or the mixed liquid can be passed therethrough. That is, by switching the valve 11, any one of the three types of release agents composed of only the reprocessing liquid, only the new liquid, or the mixed liquid can be sent to the reprocessing liquid pipe 12.
The hose nozzle device 13 includes a distribution pipe and a plurality of hose nozzles attached to the distribution pipe, and is provided between the fixed mold 1 and the movable mold 2 so as to advance and retract. In addition, the movable mold 2 is dedicated to the movable mold 2 so as to face the molding surface 2a of the movable mold 2 and a relatively large amount of release agent (for example, about 750 cc / second) is molded into the movable mold 2 so as to produce a coolant effect. It can be applied to the surface.

The valve 11 is a volume type valve, and can adjust the mixing ratio of the new liquid and the reprocessing liquid in the mixed liquid.
The valve 11 may not be a volume type, and only a certain ratio of the mixed liquid may be created. Further, it is possible to send only the reprocessed liquid or only the new liquid to the reprocessed liquid pipe 12 without preparing the mixed liquid.

Hereinafter, a new liquid coating structure for the fixed mold 1 will be described. A new liquid dedicated pipe 15 is provided independently from the new liquid tank 9 toward the spray nozzle device 16 of the fixed mold 1 separately from the new liquid branch pipe 9a, which is an existing new liquid pipe, via the pump 14. The new liquid dedicated pipe 15 is provided independently of the reprocessing liquid pipe 12 and supplies only the new liquid only to the fixed mold 1 side.
The pump 14 is driven and controlled by the new liquid dedicated control device 17, and the new liquid in the new liquid tank 9 is pumped to the spray nozzle device 16 at a predetermined discharge amount.

The spray nozzle device 16 includes a distribution pipe and a plurality of spray nozzles attached thereto, is provided exclusively for the fixed mold 1, and is provided between the fixed mold 1 and the movable mold 2 so as to freely advance and retract. Moreover, it arrange | positions so that the molding surface 1a of the fixed mold | type 1 may be faced, and a new liquid is sprayed only toward the molding surface 1a of the fixed mold | type 1. FIG.

At this time, the molding surface 1a of the fixed mold 1 does not require a coolant effect, and it is sufficient to apply a relatively small amount (for example, 20 to 30 cc / second) of a release agent. Is applied. This relatively small amount of release agent spray does not cause dripping of the release agent, so that the quality of the product surface after molding can be improved.

The spray nozzle device 16 has a different discharge amount from the hose nozzle device 13, and the particles to be ejected are fine. For example, mist-like particles of about 5 to 300 μm are formed under the conditions of a discharge pressure of 0.4 MPa and a flow rate of 30 cc / second.
On the other hand, the hose nozzle device 13 is, for example, a liquid droplet larger than the mist-like particles or a continuous liquid flow that does not become a liquid droplet discharged from the hose, and the amount of liquid applied to the mold surface flows so much. The release agent is applied, and the amount of the coating liquid is increased by an order of magnitude relative to the spray. Hereinafter, the application by the hose nozzle device 13 is referred to as a liquid application for the mist application (spraying) by the spray nozzle device 16.
In the phenomenon after application to the mold surface, liquid dripping due to spraying hardly occurs, but in the case of liquid application, there is a difference that clear liquid dripping occurs.

Next, the operation in this embodiment will be described. The hose nozzle device 13 and the spray nozzle device 16 are advanced and arranged between the fixed mold 1 and the movable mold 2 that are opened. A release agent is pumped from the reprocessing liquid pipe 12 to the hose nozzle device 13 and applied in a liquid form from the hose nozzle device 13 to the molding surface of the movable mold 2 to produce a coolant effect.

At this time, the release agent to be sent to the reprocessing liquid pipe 12 is switched between the new liquid only, the reprocessing liquid only, or the mixed liquid of the new liquid and the reprocessing liquid by switching the valve 11 by the control device 10. Is selected. Normally, only the reprocessing liquid or the mixed liquid is selected. Only the new solution is selected only when there is a special situation where it is desired to finish the back side of the product with high quality.

In principle, the molding surface 2a side of the movable mold 2 is the non-high quality portion B, and only the reprocessing liquid is sufficient in normal times. However, on the movable die 2 side, a high-purity mold release agent may be required in the same manner as the new liquid applied to the high quality part A on the molding surface 1a side of the fixed die 1. Moreover, although the purity is not as high as the new liquid applied to the high-quality part A, a release agent having a relatively high purity may be required.

Therefore, when high purity is required, the valve 11 is switched to the new liquid side, and only the new liquid is supplied from the new liquid tank 9 and the new liquid branch pipe 9a. In addition, when a release agent having a relatively high purity is required, the valve 11 is switched to the liquid mixture side, and a predetermined amount of reprocessing liquid supplied from the reprocessing liquid tank 8 through the reprocessing liquid branch pipe 8a Then, a predetermined amount of new liquid supplied from the new liquid tank 9 through the new liquid branch pipe 9a is mixed to prepare a mixed liquid, which is supplied. At this time, in this embodiment, since the valve 11 is a volume type, the mixing ratio can be freely adjusted according to the required purity of the release agent. For this reason, the mold release agent which consists of a liquid mixture of the optimal mixing ratio used as the purity according to the condition of an application surface can be supplied.

At this time, only the new liquid is sent to the high quality part A via the new liquid dedicated pipe 15 to the spray nozzle device 16, and only a necessary amount is thinly applied from the spray nozzle device 16 to the molding surface 1 a of the fixed mold 1. . This application amount is optimized by driving and controlling the pump 14 by the new liquid dedicated control device 17.

When the new liquid spray from the spray nozzle device 16 on the molding surface 1a of the fixed mold 1 and the release agent application from the hose nozzle device 13 to the molding surface 2a of the movable mold 2 are finished, the hose nozzle device 13 and the spray nozzle device 16 Retreat and exit from between the fixed mold 1 and the movable mold 2. Subsequently, the fixed mold 1 and the movable mold 2 are closed, a casting material is injected into the cavity at a high pressure, and then the mold is opened to take out the product.

At this time, the product is easily taken out by the release agent applied to the molding surface 1a of the fixed mold 1 and the molding surface 2a of the movable mold 2.
Further, since only a small amount of high-purity new liquid is sprayed on the high-quality part A on the molding surface 1a of the fixed mold 1, there is no liquid dripping, and the product surface can form high appearance quality.

Moreover, the molding surface 2a of the movable mold 2 can be effectively prevented from being seized by the coolant effect of the mold release agent by applying a large amount of reprocessing liquid with the hose nozzle device 13 and reprocessing. The amount of liquid used can be increased, the amount of waste liquid can be reduced, and the environmental load can be reduced.

In addition, the release agent applied by the hose nozzle device 13 can be selected from any one of three types consisting of only a new liquid, only a reprocessing liquid, or a mixed liquid of a new liquid and a reprocessing liquid. A release agent having an appropriate purity can be selected according to the appearance quality required for the back surface of the product formed by the molding surface 2a.

Thus, according to this embodiment, paying attention to the fact that the purity of the mold release agent differs for each part of the mold, the mold release agent application part of the mold is changed to the new liquid limited part (high quality part A ) And non-limited parts (non-high quality part B), the new liquid and the reprocessing liquid are used properly according to the new liquid limited part and the non-limited part. When casting a product that could not be used, the new liquid was applied only to the new liquid limited part (high quality part A) which is a part of the mold, and the non-limited part (non-limited part) It has become possible to use a reprocessing liquid for the high quality part B). For this reason, it becomes possible to use a new liquid and a reprocessing liquid simultaneously in one casting operation, and the reprocessing liquid can be efficiently recycled.

In addition, the reprocessing liquid can be used efficiently without introducing an advanced release agent reuse system, so the introduction of an expensive advanced release agent reuse system can be avoided and costs can be reduced. Can do.
As a result, the amount of waste liquid treated can be reduced to reduce the environmental load, and the effect can be improved as an environmental measure.

Further, according to the high quality of appearance required for the product surface, the molding surface of the mold is divided into a high quality part A (new liquid limited portion) which is the molding surface 1a of the fixed mold 1 and the molding surface of the movable mold 2. The non-high quality portion B (non-limited portion) 2a is divided into non-high quality portions B, which are portions that do not require high appearance quality during normal times.
Accordingly, it is possible to apply the new liquid only to the high quality part A and to use the reprocessed liquid or the mixed liquid for the non-high quality part B, which is the other part, at normal times.
For this reason, according to the external appearance quality of a product, a new liquid and a reprocessing liquid can be properly used properly.

Further, only the new liquid is applied to the molding surface 1a (high quality part A) of the fixed mold 1, and the new liquid, the reprocessing liquid or the new liquid is applied to the molding surface 2a (non-high quality part B) of the movable mold 2. When one of the three types of release agents composed of a mixture of the liquid and the reprocessing liquid is used separately, it is actually required for the molding surface 2a (non-high quality part B) of the movable mold 2 Depending on the purity of the release agent to be used, it can be dealt with finely and appropriately.

Further, a new liquid is applied in the form of a mist to the molding surface 1a (high quality part A) of the fixed mold 1, and droplets larger than the mist are applied to the molding surface 2a (non-high quality part B) of the movable mold 2. Since a release agent is applied, the amount of new solution used can be minimized and the cost can be reduced.

Also, a new liquid dedicated pipe 15 for supplying only a new liquid to the molding surface 1a (high quality part A) of the fixed mold 1 that forms a portion that requires high appearance quality, and a molding surface 2a of the movable mold 2 (non-high quality) Since the reprocessing liquid pipe 12 for supplying the release agent to the part B) is provided independently, only the new liquid dedicated pipe 15 is added to the existing part including the reprocessing liquid pipe 12, and the new liquid dedicated A release agent coating apparatus having two systems of release agent application sections including the pipe 15 and the reprocessing liquid pipe 12 can be easily configured.
In addition, since the introduction of an expensive advanced mold release agent reuse system can be avoided, the cost can be suppressed.

Further, by switching the valve 11, the release agent to be sent to the reprocessing liquid pipe 12 can be selected from any one of three types of new liquid, reprocessing liquid, or a mixture thereof. The second molding surface 2a (non-high quality part B) can be dealt with finely and appropriately according to the purity of the release agent actually required.

In addition, since the valve 11 can adjust the mixing ratio of the new liquid and the reprocessing liquid, the purity of the release agent with respect to the molding surface 2a (non-high quality part B) of the movable mold 2 can be further finely and appropriately handled. can do.

In addition, since two new liquid branch pipes 9a and a new liquid dedicated pipe 15 connected to the reprocessing liquid pipe 12 are installed for one new liquid tank 9, the new liquid can be provided even if two new liquid pipes are provided. The tank 9 can be left as it is, and the structure of the apparatus can be simplified and the cost increase can be suppressed.

Furthermore, since the new liquid dedicated pipe 15 is connected to the spray nozzle device 16, a small amount of new liquid can be applied in the form of a mist from the spray nozzle device 16 toward the molding surface 1a (high quality portion A) of the fixed mold 1. . For this reason, it is possible to prevent liquid sag in the high quality part and to reduce the amount of new liquid that is relatively expensive to reduce the cost.
In addition, since the reprocessing liquid pipe 12 is connected to the hose nozzle device 13, a large amount of relatively inexpensive reprocessing liquid is directed from the hose nozzle device 13 toward the molding surface 2a (non-high quality part B) of the movable mold 2. It can apply | coat, and while suppressing cost, the coolant effect by a mold release agent can be anticipated.

Further, since the high quality part A is formed on the molding surface 1a of the fixed mold 1 and the non-high quality part B is formed on the molding surface 2a of the movable mold 2, the new liquid dedicated pipe 15 is arranged on the fixed mold 1 side, The reprocessing liquid pipe 12 can be arranged and separated on the movable mold 2 side, and the pipe structure can be simplified.

Next, another embodiment will be described with reference to FIGS. Since this embodiment is also obtained by changing only a part of the embodiment of FIG. 1, common portions are denoted by common reference numerals, mainly description of different portions, and description of overlapping portions is omitted.
FIG. 2 shows the molding surface 1 a of the fixed mold 1. The molding surface 1a includes a high quality part A and a non-high quality part B.

FIG. 3 shows a hose nozzle device 13 portion, and at least a part of the hose nozzle device 13 including the portion corresponding to the non-high quality portion B is a movable portion 20. In addition, let the part except the movable part 20 be a main-body part. In this example, a main body partial pipe 21 that distributes the release agent to each nozzle in the main body section of the hose nozzle device 13 is provided with the axial direction thereof in the vertical direction of the figure. At 22, the movable part pipe 23 of the movable part 20 is rotatably connected. The movable part 20 is rotatable at least about 180 ° around the axis of the main body partial pipe 21, and a release agent is supplied to each nozzle of the movable part 20 from the movable partial pipe 23 connected to the main body partial pipe 21. Is done.

Therefore, when the movable portion 20 is rotated about 180 ° in a state where each nozzle of the movable portion 20 faces the molding surface 2 a of the movable mold 2, each nozzle of the movable portion 20 is moved to the molding surface 1 a of the fixed die 1. To the non-high quality part B.
Therefore, the reprocessing liquid or the mixed liquid can be applied from the movable part 20 toward the non-high quality part B with the movable part 20 directed toward the non-high quality part B of the fixed mold 1. Further, a new liquid can be applied.

If it does in this way, paying attention to the case where the part which differs in the required purity of a mold release agent may exist in the molding surface 1a which forms a product surface, a new liquid is supplied to the high quality part A from the spray nozzle device 16. Since the reprocessing liquid or the mixed liquid can be applied to the non-high quality part B from the movable part 20 of the hose nozzle device 13 by spraying, the usage rate of the reprocessing liquid can be further improved.

Moreover, since the application from the movable part 20 of the hose nozzle device 13 to the non-high quality part B is a liquid with a large discharge amount, the coolant is partially applied to the non-high quality part B even on the same molding surface 1a. The effect can also be expected.
Moreover, since application | coating of the new liquid with respect to the molding surface 1a is a mist-like application | coating limited to the high quality part A, the usage-amount of a new liquid can be suppressed further, and also the use efficiency of a reprocessing liquid can be made higher. Can do.

A new liquid can be applied from the movable part 20 of the hose nozzle device 13 instead of the reprocessing liquid or the mixed liquid. Even in this case, a coolant effect on the non-high quality part B can be expected, and the product surface after molding can be made high quality by using a new liquid. That is, even when a new liquid is used for the same molding surface 1a, the mist-like application and the liquid application can be properly used according to the required quality of each part.

Further, since at least a part of the hose nozzle device 13 is the movable portion 20, the common hose nozzle device 13 is used to simultaneously remove the reprocessing liquid and the like from the non-high quality portions B of the fixed mold 1 and the movable mold 2. Since the mold can be applied, it is not necessary to newly pipe the reprocessing liquid to the non-high quality part B of the fixed mold 1. For this reason, it is possible to eliminate the need for increasing the number of pipes for the new release agent, and also to realize liquid application to a part of the fixed mold 1 side without providing a new application device. Can be.

1: fixed type, 2: movable type, 8: reprocessing liquid tank, 9: new liquid tank, 10: new liquid / reprocessing liquid control device, 11: adjustment valve, 12: existing piping, 13: hose nozzle device, 15: New liquid dedicated pipe, 16: Spray nozzle device, 17: New liquid dedicated control device 20: Movable part

Claims (12)

In applying a release agent to a mold used for high-pressure casting, a method of using a reprocessing liquid obtained by collecting and reprocessing the already applied release agent together with a new liquid of the release agent that has not been used.
For the mold release agent application part of the mold (1, 2), it is divided into a new liquid limited part that applies only the new liquid and a non-limited part that can be used for the reprocessing liquid without being limited to the new liquid,
A release agent coating method in high-pressure casting, wherein the use of a new liquid and a reprocessing liquid is selectively used according to the limited part and the non-limited part of the new liquid. The new liquid limited part is a high quality part (A) that forms a part that is required to have high appearance quality on at least a part of the product surface,
2. The high-pressure casting according to claim 1, wherein the non-limited portion is a non-high quality portion (B) that forms a portion that is not required to have high appearance quality as high as the new liquid limited portion in a normal state. Release agent coating method. Apply only the new solution to the high quality part (A),
The non-high quality portion (B) is coated with one of three types of release agents composed of the new liquid, the reprocessing liquid, or a mixed liquid of the new liquid and the reprocessing liquid. Item 3. A release agent coating method in high-pressure casting described in Item 2. The high quality part (A) is coated with the new liquid in a mist form,
4. The release agent coating method in high-pressure casting according to claim 2, wherein a release agent of droplets larger than fog is applied to the non-high quality portion (B). When applying a mold release agent to the mold (1, 2) used for high-pressure casting, an apparatus that uses a reprocessed liquid obtained by reprocessing the already applied mold release agent together with a new liquid of the mold release agent that is not used In
The mold (1, 2) is a high quality part (A) that forms a part that is required to have high appearance quality on at least a part of the product surface;
A non-high quality part (B) that forms a part that is not required to have a high appearance quality as high as the high quality part (A) at a normal time,
Only the new liquid is applied to the high quality part (A) through the new liquid dedicated pipe (15) for supplying only the new liquid,
While applying a release agent to the non-high quality part (B) through a reprocessing liquid pipe (12) configured to be able to supply the reprocessing liquid,
A release agent coating apparatus in high-pressure casting, wherein the new liquid dedicated pipe (15) and the reprocessing liquid pipe (12) are provided independently. The reprocessing liquid pipe (12) is connected to a reprocessing liquid tank (8) and a new liquid tank (9) via a valve (11), and the reprocessing liquid pipe (12) is switched by switching the valve (11). 6. The release agent for high pressure casting according to claim 5, wherein the release agent sent to the liquid pipe (12) can be selected from a new solution, a reprocessed solution, or a mixed solution thereof. Coating device. The release agent coating apparatus for high-pressure casting according to claim 6, wherein the valve (11) is capable of adjusting a mixing ratio of the new liquid and the reprocessing liquid when the mixed liquid is adjusted. The new liquid pipe connected to the new liquid tank (9) includes the new liquid branch pipe (9a) connecting the new liquid tank (9) and the valve (11), and the new liquid dedicated pipe (15). The new liquid branch pipe (9a) and two new liquid dedicated pipes (15) are installed for one new liquid tank (9). A release agent coating apparatus in high-pressure casting described in 1. The new liquid dedicated pipe (15) is connected to a spray nozzle device (16), and the spray nozzle device (16) applies the new liquid in the form of a mist toward the high quality part (A),
The reprocessing liquid pipe (12) is connected to a hose nozzle (13) having a larger discharge amount than the spray nozzle device (16), and the hose nozzle (13) is directed toward the non-high quality portion (B). The release agent coating apparatus for high pressure casting according to any one of claims 5 to 8, wherein a release agent comprising the reprocessing liquid, a new liquid, or a mixture thereof is applied. The high quality part (A) is formed on the molding surface (1a) of the fixed mold (1), and the non-high quality part (B) is formed on the molding surface (2a) of the movable mold (2). 10. A release agent coating apparatus in high-pressure casting according to claim 9. The molding surface (1a) of the fixed mold (1) is provided with the high quality part (A) and the non-high quality part (B), and the non-high quality part (B) includes the reprocessing liquid. 11. A release agent coating apparatus for high pressure casting according to claim 10, wherein a release agent comprising a new liquid or a mixture thereof is applied. The hose nozzle (13) includes a movable part (20) that changes the application direction at least partially, and the movable part (20) is released toward the non-high quality part (B) of the fixed mold (1). The release agent coating apparatus in high pressure casting according to claim 11, wherein the agent is applied.

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