JP2012200777A - Shaping device and shaping method using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a shaping device capable of excellently applying a mold releasing agent on cavities even when the shapes of the cavities are complicated and the cavities have narrow and small parts, and to provide a shaping method using the same.SOLUTION: The shaping device includes: a metal mold 33 having a fixed mold 25 and a movable mold 26 and forming cavities in a mold closed state; a guide post 18 for guiding movement of the movable mold 26; a mold releasing agent applying nozzle 45 provided in the guide post 18 and directed on cavity forming parts 30, 31 of the metal mold 33 in a mold open state; and a mold releasing agent supply flow passage 46 provided in the guide post 18 and supplying the mold releasing agent to the mold releasing agent applying nozzle 45.

Description

  The present invention relates to a molding apparatus capable of satisfactorily applying a release agent to a cavity of a mold and a molding method using the same.

  In mold molding in which a molded product is molded using a mold, a release agent is applied to the inner surface of the cavity in order to avoid troubles such as the molded product sticking to the inner surface of the mold and cannot be taken out. The type of release agent varies depending on the molding method and the material of the molded product, but an oil, wax, and silicon emulsified are often used.

  In particular, in the die casting method, in which a molten alloy is hot-pressed into a precision mold and mass-produced in a short time for high-precision molded products with good cast surface properties, the molded die-cast products have high-precision cast surface properties. The release agent is important for removing it in good condition. Die-cast products are used in various industrial products such as automobiles and home appliances. Among them, aluminum alloy die-cast products are produced in large quantities.

  If the mold release agent is not applied to the mold properly, the appearance defects of the die-cast product may include deformation, poor hot water circulation, hot water, hot water flow pattern, hot water boundary, seizure, galling, etc. The nest is generated as an internal defect.

  Deformation means that the die-cast product does not have a prescribed shape, and is caused by shrinkage imbalance due to stress concentration, insufficient strength of the extrusion pin, and cooling imbalance. The cooling imbalance is usually solved by the type of release agent, the coating amount, and the coating method.

  Poor hot water circulation refers to a state in which the molten metal is not filled to every corner of the die-cast product and solidifies in the middle of the result. This is likely to occur when the filling time is short at the thin-walled portion and the gas due to decomposition of the release agent in the cavity tends to remain in the cavity. Responding to changes in mold design and degassing agent properties that incorporate degassing techniques to a configuration that generates less gas, reducing the amount of release agent applied, and changing to a highly heat-retaining release agent is there.

  A hot water bath is an irregular cup-shaped pattern formed on the surface of a die-cast product, and the hot water flow pattern is a stripe-like gloss. These phenomena occur when the mold temperature is low or when the gas generated from the release agent becomes a high pressure and pushes the surface of the die-cast product or the amount of the release agent applied is large. As countermeasures, a mold release agent with good adhesion is used at a low concentration, or the coating amount is reduced and the mold is kept at an appropriate temperature.

  The hot water boundary is an event in which the molten metal does not fuse at the portion where the molten metal joins, the molten metal enters in a nonuniform manner at the remaining boundary, and one molten metal solidifies first and remains as a boundary. This is dealt with by smoothing the flow of the molten metal and raising the temperature of the molten metal and mold. It may be improved by reducing the amount of the release agent applied.

  The seizure is that the surface of the die-cast product is welded to the surface of the mold or the core pin due to local overheating or wear of the mold, and is peeled off at the time of mold release. It can be improved by changing to a release agent with good adhesion or increasing the coating amount of the release agent.

  The galling is a scratch on the surface when the die-cast product is taken out, and the solidification of the molten metal is delayed due to local overheating in the cavity, and the die or cast pin surface is welded and baked to take out the die-cast product. Sometimes scratches. The galling is likely to occur when the amount of the release agent attached is small. Therefore, increasing the amount of release agent and increasing the concentration are solutions. Changing to a release agent with good adhesion may also reduce galling.

  In addition, nests of internal defects are cavities generated by the solidification of the gas generated from the air and mold release agent inside the mold while remaining in the melt. In some cases. The nest can be suppressed by reducing the coating amount of the release agent, reducing the concentration, or changing to a release agent with less gas generation.

  Here, the die-cast mold has a temperature range of 150 to 400 degrees, for example, and in order to cast an alloy in the cavity, the mold release agent must be uniformly attached in the temperature range. If the uniform adhesion of the release agent is not successful, the above-described internal and external defects of the die cast product may occur. Such a defect problem is solved by changing the composition of the release agent, or by devising an apparatus.

  By the way, in a mass production process, since the working time is limited, the application type is often applied with one or a plurality of application guns or application nozzles being moved or fixed while being moved by a link type arm or robot. Such devices are commercially available.

  For example, Patent Document 1 proposes a movable spray nozzle with respect to a spray head in order to reduce the size of the release agent coating apparatus and shorten the cycle time. Further, in Patent Document 2, the movable unit is provided with a concave portion so that the injection unit is not moved each time the mold release agent is applied, so that the operating cost can be reduced and the molding cycle can be shortened. A technique for supplying a release agent from a recess is disclosed. Further, Patent Document 3 proposes an improvement plan for moving the spray head three-dimensionally in order to improve the application state of the release agent of the moving type spray head.

JP-A-6-312251 JP 2001-113352 A JP 2006-334646 A

  As described in the background art above, although the application condition of the mold release agent has been improved by the application of the mold release agent with a link type arm or robot, the shape of the die cast product is complicated or narrow. When it is necessary to apply a release agent, the apparatus and method described in the background art are not sufficient.

  For example, in the three-dimensional movement of the movable spray nozzle described in Patent Document 1 and the spray head described in Patent Document 3, it is impossible to apply a release agent to the same narrow portion every time. That is, it is impossible to make the movement trajectory of the spray nozzle exactly the same every time, and it is impossible to accurately stop at the same position and angle every time. If the angle is shifted by 1 degree, the shift is 8.7 mm after 50 cm. This makes it difficult to apply a release agent to a complicated shape or a narrow portion.

  Further, according to Patent Document 2, it is considered that a considerable part of the process of moving the spray head after opening the mold into the mold and applying the release agent can be omitted, which is effective in shortening the cycle time. However, the cavity of a die-cast product having a complicated shape naturally has a complicated shape, and in order to uniformly apply a release agent to the cavity, a plurality of release agent supply paths are provided in the mold. Inevitably, a large number of holes are confined in the mold. If the hole is confined in the cavity, it will lead to the manufacture of incomplete die-cast products and shorten the life of the mold. Therefore, it cannot be applied to complex-shaped die-cast products. In addition, this method is related to the release agent application to the injection molding method of magnesium alloy, which is essential for sprue holes, runner grooves, and gate holes. Yes. In addition, the high temperature part of the mold, for example, the gate part connected to the cavity is the highest temperature part in the entire mold, but early cooling greatly contributes to the improvement of the work quality and the reduction of the cycle time.

  The present invention relates to a molding apparatus capable of satisfactorily applying a release agent to a cavity even when the shape of the cavity is complicated or the cavity has a narrow portion, and a molding method using the same The purpose is to provide.

  The invention according to claim 1 has a fixed mold (for example, the fixed mold 25 in the embodiment) and a movable mold (for example, the movable mold 26 in the embodiment), and forms a cavity (for example, the cavity 32 in the embodiment) in a closed state. A mold (for example, the mold 33 in the embodiment), a guide post (for example, the guide post 18 in the embodiment) for guiding the movement of the movable mold, and the mold that is provided in the guide post and is in the mold open state. In the guide post, a release agent application nozzle (for example, release agent application nozzles 45, 75, 90, and 95 in the embodiment) directed to the cavity formation portion of the mold (eg, the cavity formation portions 30 and 31 in the embodiment). A release agent supply flow path that is provided and supplies the release agent to the release agent application nozzle (for example, the release agent supply flow paths 46, 76, 91 in the embodiment). With 96) and.

  The invention according to claim 2 is the invention according to claim 1, wherein the mold includes a core (for example, the movable core 65 in the embodiment) that forms the cavity in the mold closed state, and the mold closed state. And a core covering portion (for example, the core covering portion 73 in the embodiment) that is covered with the core, and is in the mold open state at the position of the core covering portion in the mold. A mold release agent application nozzle directed to the cavity forming portion of the mold is provided, and a mold release agent supply channel for supplying the mold release agent to the mold release agent application nozzle is provided in the mold. It is characterized by that.

  According to a third aspect of the present invention, in the invention according to the first or second aspect, the fixed mold and the movable mold may be provided with protrusions that fit together at a position away from the cavity when the mold is closed (for example, The convex portion 85 in the embodiment and the concave portion (for example, the concave portion 86 in the embodiment) are provided, and the mold is opened in at least one of the convex portion and the concave portion in the mold. A mold release agent application nozzle directed to the cavity forming portion of the mold is provided, and a mold release agent supply channel for supplying the mold release agent to the mold release agent application nozzle is provided in the mold. It is characterized by.

  The invention according to claim 4 is the invention according to any one of claims 1 to 3, characterized in that an air supply flow path for supplying air to the release agent coating nozzle is provided.

  According to a fifth aspect of the present invention, in the invention according to any one of the first to fourth aspects, the release agent application nozzle has a variable ejection direction of the release agent.

  The invention according to claim 6 is the invention according to any one of claims 1 to 5, characterized in that the release agent application nozzle is removable from the release agent supply flow path.

  The invention according to claim 7 is the invention according to any one of claims 1 to 6, wherein a plurality of the release agent application nozzles are provided in one release agent supply flow path. To do.

  The invention according to claim 8 is a molding method using the molding apparatus according to any one of claims 1 to 7, wherein a step of injecting a molten metal into the cavity of the mold which is closed with the mold, A step of moving the movable mold to open the mold, and releasing from the mold release agent application nozzle to the non-holding mold side of the movable mold and the fixed mold where no molded product remains through the mold release agent supply flow path A step of ejecting the agent, a step of removing and transporting the molded product from the holding mold where the molded product remains, and the holding mold side from which the molded product has been removed to the holding mold side via the mold release agent supply channel. And a step of ejecting the release agent from the release agent application nozzle.

  The invention according to claim 9 is a molding method using the molding apparatus according to claim 4, wherein a step of injecting molten metal into the cavity of the mold which is closed is moved, and the mold is moved by moving the movable mold. A step of opening, a step of applying a release agent from the release agent application nozzle to the non-holding die side of the movable die and the fixed die where no molded product remains, via the release agent supply flow path, Removing the molded product from the holding mold in which the molded product remains and transporting the molded product to the holding mold side from which the molded product has been removed from the release agent application nozzle via the release agent supply channel. The method includes a step of ejecting a mold agent and a step of supplying air to the mold release agent application nozzle through the air supply channel after the ejection of the mold release agent.

  The invention according to claim 10 is characterized in that, in the invention according to claim 8 or 9, the residual mold release agent is sucked by the decompression path installed in the mold.

  According to the first aspect of the present invention, since the release agent application nozzle and the release agent supply flow path are provided in the guide post, the mold is opened from a direction different from that provided outside the mold apparatus. The mold release agent can be injected into the cavity forming portion of the mold in the above. Therefore, even when the shape of the cavity is complicated or the cavity has a narrow portion, it is possible to satisfactorily apply the release agent to the cavity. Furthermore, the high temperature part of the mold can be quickly cooled at a pinpoint, and effects such as reduction of molding defects, shortening of cycle time, and extension of mold life can be expected (the high temperature part of the mold is a gate part, for example). In addition, since the release agent application nozzle and the release agent supply flow path are provided in the guide post, they do not interfere with the movement of the movable type and are unlikely to fail. In addition, it is only necessary to perform some additional processing on the originally required guide post, and the release agent application nozzle and the release agent supply channel can be easily provided at low cost. In addition, since the structure of the release agent application nozzle and the release agent supply flow path can be simplified, it becomes difficult to break down and is excellent in maintainability.

  According to the second aspect of the present invention, the release agent application nozzle is provided at the position of the core covering portion covered by the core in the mold closed state, and the release agent supply flow path is provided in the mold. Therefore, it is only necessary to perform some additional processing on the mold, and the release agent application nozzle and the release agent supply channel can be easily and inexpensively provided in the mold apparatus. In addition, since the structure of the release agent application nozzle and the release agent supply flow path can be simplified, it becomes difficult to break down and is excellent in maintainability. In addition, it is possible to provide the release agent application nozzle and the release agent supply flow path by effectively utilizing the position where the cavity is not formed in the mold closed state in the mold.

  According to the invention of claim 3, the mold is provided with a release agent application nozzle at at least one of a convex part and a concave part that are fitted to each other at a position away from the cavity when the mold is closed. Since the mold release agent supply flow path is provided, it is only necessary to perform some additional processing on the mold, and the mold release agent application nozzle and the mold release agent supply flow path can be easily and inexpensively provided in the mold apparatus. Can do. In addition, since the structure of the release agent application nozzle and the release agent supply flow path can be simplified, it becomes difficult to break down and is excellent in maintainability. In addition, it is possible to provide the release agent application nozzle and the release agent supply flow path by effectively utilizing the position where the cavity is not formed in the mold closed state in the mold.

  According to the fourth aspect of the invention, since the air supply flow path for supplying air to the release agent application nozzle is provided, air is ejected from the release agent application nozzle and remains in the release agent application nozzle. Remove the release agent and clean it. Therefore, dripping of the release agent from the release agent application nozzle can be prevented. Further, by ejecting air from the release agent coating nozzle and repeating the molding, it is possible to remove unnecessary materials such as a minute residue of the molding material adhering to the mold. Thereby, an air blow nozzle can be combined with a mold release agent application nozzle.

  According to the fifth aspect of the invention, since the release agent application nozzle has a variable ejection direction of the release agent, the release agent is ejected toward an appropriate position by appropriately adjusting the ejection direction. Can do. Further, even if the heat spot moves or the design of the mold is changed, it can be flexibly dealt with.

  According to the invention of claim 6, since the release agent application nozzle can be easily removed from the release agent supply flow path, the time for maintenance work such as disassembly and cleaning can be shortened. Since it is only necessary to replace the release agent application nozzle when the setting of the ejection direction or the like is changed, the setting can be changed at low cost and in a short time. Therefore, it is possible to change the setting as appropriate to improve the application state of the release agent in a low cost and in a short time.

  According to the invention which concerns on Claim 7, since the several release agent application nozzle is provided in the one release agent supply flow path, a release agent can be apply | coated to several site | parts.

  According to the invention according to claim 8, the step of ejecting the release agent from the release agent application nozzle through the release agent supply channel toward the non-holding die where the molded product does not remain among the movable die and the fixed die; The molded product can be removed from the holding mold where it remains and transported in parallel, and then the release agent is applied to the holding mold from which the molded product has been removed via the release agent supply flow path. A release agent can be ejected from the nozzle. Therefore, the process of removing the molded product from the holding mold and conveying it and the process of ejecting the release agent to the non-holding mold can be performed in parallel and the cycle time can be shortened.

  According to the ninth aspect of the invention, since air is supplied to the release agent application nozzle via the air supply channel after the release of the release agent, it is possible to prevent dripping of the release agent from the release agent application nozzle. .

  According to the invention which concerns on Claim 10, the residual mold release agent in a cavity can be removed.

It is a side view which shows the shaping | molding apparatus which concerns on one Embodiment of this invention. It is a side view of the principal part which shows the shaping | molding apparatus which concerns on one Embodiment of this invention. The release agent application nozzle of the shaping | molding apparatus which concerns on one Embodiment of this invention is shown, (a) is a sectional side view, (b) is a top view. It is a side view of the principal part which shows the shaping | molding apparatus which concerns on one Embodiment of this invention. It is A arrow directional view of FIG. It is a sectional side view of the important section showing the forming device concerning one embodiment of the present invention. It is a side view of the principal part which shows the shaping | molding apparatus which concerns on one Embodiment of this invention. (A) is a B arrow view of FIG. 7, (b) is a C arrow view of FIG. It is a side view of the principal part which shows the shaping | molding apparatus which concerns on one Embodiment of this invention. It is a timing chart which shows the shaping | molding method etc. which concern on one Embodiment of this invention. It is a sectional side view which shows the modification of the mold release agent application nozzle part of the shaping | molding apparatus which concerns on one Embodiment of this invention. It is a timing chart which shows the modification of the shaping | molding method which concerns on one Embodiment of this invention.

  An embodiment of the present invention will be described below with reference to the drawings.

  FIG. 1 shows a molding apparatus 11. Specifically, this forming apparatus 11 is a die-cast apparatus for forming a molded product of an aluminum alloy, and includes a base frame 12, a link housing 13 mounted in a fixed state on one end side of the base frame 12, a base It has a fixed platen 14 mounted in a fixed state on the other end side on the frame 12, and a movable platen 15 provided between the link housing 13 and the fixed platen 14.

  Four tie bars 20 are horizontally extended in the link housing 13 and the fixed platen 14 so as to connect the four corners of the upper, lower, left and right sides, and the movable platen 15 is inserted into the four corners of the upper, lower, left and right sides. I am letting. Therefore, the movable platen 15 slides along these tie bars 20. The movable platen 15 and the link housing 13 are connected by a toggle mechanism 21, and the movable platen 15 approaches and separates from the link housing 13 by the operation of the mold clamping cylinder 22 of the toggle mechanism 21. As a result, the movable platen 15 Is spaced apart and close to the stationary platen 14.

  A fixed mold 25 is fixed to the inner side of the four tie bars 20 on the movable platen 15 side of the fixed platen 14, and the inner side of the four tie bars 20 is fixed to the fixed platen 14 side of the movable platen 15. The movable mold 26 is fixed. When the movable platen 15 moves to the fixed platen 14 side by the operation of the mold clamping cylinder 22 of the toggle mechanism 21, the fixed die 25 and the movable die 26 abut the mating surfaces.

  The fixed mold 25 and the movable mold 26 are in a mold closed state in which the mating surfaces are in contact with each other in this manner, and the shape of the molded product is determined by the cavity forming section 30 of the fixed mold 25 and the cavity forming section 31 of the movable mold 26. A cavity 32 will be formed. Further, when the movable platen 15 is moved to the opposite side of the fixed platen 14 by the operation of the mold clamping cylinder 22 of the toggle mechanism 21, the movable die 26 and the fixed die 25 are brought into a die open state in which the mating surfaces are separated from each other. In this state, the molded product molded in the cavity 32 can be taken out. At this time, the molded product is held by the movable die 26 and is separated from the fixed die 25. Therefore, the movable die 26 becomes a holding die where the molded product remains, and the fixed die 25 is a non-holding die where the molded product does not remain. Become.

  The movable mold 26 and the fixed mold 25 constitute a mold 33 that forms the cavity 32 when the mold is closed. The mold 33, the movable mold 26, the fixed mold 25, and the four tie bars 20 are formed. A mold apparatus 34 is configured. The tie bar 20 causes the movable platen 15 to slide, and as a result, the movable die 26 is guided to move along the tie bar 20.

  An injection mechanism 40 that injects molten metal into the cavity 32 is provided on the opposite side of the fixed platen 14 to the movable platen 15. Further, an extrusion mechanism 41 is provided on the opposite side of the movable platen 15 to the fixed platen 14 to push out a molded product formed in the cavity 32 from the movable die 26. The molded product is a housing of a valve unit that switches a plurality of hydraulic flow paths for an automatic transmission of an automobile, and has a shape in which a complicated flow path is formed.

  As shown in FIG. 2, a guide post 18 that protrudes toward the fixed mold 25 along the moving direction of the movable mold 26 is formed on the movable mold 26 of the mold 33 at a position separated from the cavity forming portion 30. In alignment with this, a guide hole 19 that is recessed on the opposite side of the movable mold 26 along the moving direction of the fixed mold 25 is formed at a position separated from the cavity forming portion 30 in the fixed mold 25. Yes. These guide posts 18 and guide holes 19 formed in the movable mold 26 and the fixed mold 25 are slidably fitted to each other at a position away from the cavity until the mold is closed from the middle of the mold closing. In other words, the guide post 18 guides the movement of the movable mold 26 relative to the fixed mold 25. Any one of the guide post 18 and the guide hole 19 only needs to be provided on the movable die 26 and the other is provided on the fixed die 25. These do not inconvenience the mold dividing surface of the movable die 26 of the mold 33. Will be provided at the position.

  As shown in FIG. 2, at least one of the cavity forming portion 30 of the fixed die 25 and the cavity forming portion 31 of the movable die 26 is set in the guide post 18 when the mold 33 is in the mold open state. A release agent application nozzle 45 directed to the cavity forming portion 31 (in the illustrated example) and a release agent supply channel 46 for supplying the release agent to the release agent application nozzle 45 are formed.

  The release agent application nozzle 45 is detachable from the guide post body 51 except the release agent application nozzle 45 of the guide post 18. As shown in FIG. 3, the release agent application nozzle 45 is fixed to the guide post body 51 by fastening a plurality of bolts 53 in a state of being fitted in the mounting recess 52 of the guide post body 51. In this state, the release agent application nozzle 45 communicates with the release agent supply channel 46. Further, the release agent application nozzle 45 can be detached from the guide post body 51 by loosening the bolt 53. As a result, the release agent application nozzle 45 can be detached from the release agent supply channel 46.

  As shown in FIG. 2, the release agent supply channel 46 is connected to a release agent supply source 55 that pumps the release agent and an air supply source 56 that pumps air through a cable bear or the like. A state where the valve 57 communicates with the release agent supply source 55 and does not communicate with the air supply source 56, a state where communication with the air supply source 56 does not communicate with the release agent supply source 55, and a release agent supply source 55. And the state where the air supply source 56 does not communicate with the air supply source 56. Therefore, the release agent supply channel 46 also serves as an air supply channel for supplying air to the release agent application nozzle 45.

  The release agent supply source 55, the release agent application nozzle 45, and the release agent supply flow path 46 constitute a release agent application device 61. The release agent application device 61 includes a release agent application nozzle. 45 and a release agent supply channel 46 are provided in the guide post 18 of the mold apparatus 34.

  As shown in FIGS. 4, 5, and 6, the mold 33 is moved to the movable mold 26 in a direction different from the moving direction of the movable mold 26, specifically in a direction orthogonal to the moving direction of the movable mold 26. A movable core 65 that moves is provided. The movable core 65 is driven by a cylinder device 66 such as an air cylinder to move forward and backward. The movable core 65 moves forward in the mold closed state shown in FIG. 6, and in this state, the cavity forming portion 67 opposite to the cylinder device 66 forms the cavity 32 together with the fixed mold 25 and the movable mold 26. The cavity forming portion 67 of the movable core 65 is formed with a hole forming projection 68 that protrudes on the opposite side of the cylinder device 66, and the hole forming projection 68 is formed on the molded product in the moving direction of the movable die 26. Form holes in different directions. The movable core 65 is retracted when the molded product is removed, and the molded product cannot be removed unless the hole forming projection 68 is removed from the hole. That is, this hole becomes an undercut portion that cannot be punched as it is. A step 70 is formed on the movable core 65 on the side opposite to the cavity forming portion 67, and the fixed mold 25 abuts against the back surface 71 of the step 70 to restrict the retraction of the movable core 65. A pressing surface 72 is formed.

  The pressing surface 72 is a surface of the core covering portion 73 of the fixed mold 25 that is covered by the movable core 65 at a position away from the cavity 32 when the mold 33 is in the mold closed state. The core covering portion 73 is a mold functional part having a function of pressing the movable core 65. In the fixed mold 25, when the mold 33 is in an open state, the cavity forming section 30 of the fixed mold 25 and the cavity forming section 31 of the movable mold 26 are set at the position of the core covering section 73. Further, a release agent application nozzle 75 directed to at least one of them (the cavity forming unit 30 in the illustrated example) is formed, and a release agent is further applied to the release agent application nozzle 75 in the fixed mold 25. A release agent supply channel 76 for supplying is formed.

  Although not shown, the release agent application nozzle 75 is also detachable from the fixed mold main body excluding the release agent application nozzle 75 of the fixed mold 25. The release agent supply flow path 76 is also connected to the release agent supply source 55 and the air supply source 56 via a cable bear or the like, and communicates with the release agent supply source 55 by an electromagnetic valve 79 and is also an air supply source. The state is not switched to the state 56, the state is not connected to the release agent supply source 55, and the state is not connected to either the release agent supply source 55 or the air supply source 56. Therefore, the release agent supply channel 76 also serves as an air supply channel for supplying air to the release agent application nozzle 75.

  The release agent supply source 55, the release agent application nozzle 75, and the release agent supply channel 76 also constitute a release agent application device 61. The release agent application device 61 includes the release agent application nozzle 75 and the release agent application nozzle 75. A release agent supply channel 76 is provided in the fixed mold 25 of the mold apparatus 34. Specifically, a release agent application nozzle 75 is provided at the position of the core covering portion 73 in the fixed mold 25, and a release agent supply channel 76 is provided in the fixed mold 25.

  As shown in FIG. 2, the mold 33 is provided with a convex portion 85 that protrudes toward the movable die 26 along the moving direction of the movable die 26 at a position separated from the cavity forming portion 30. In accordance with this position, a concave portion 86 is formed in the movable die 26 at a position spaced apart from the cavity forming portion 30. The concave portion 86 is recessed on the opposite side of the fixed die 25 along the moving direction of the movable die 26. Yes. These convex portions 85 and concave portions 86 formed on the fixed mold 25 and the movable mold 26 are fitted to each other at a position away from the cavity when the mold is closed. Any one of the raised convex portion 85 and the depressed concave portion 86 may be provided on the fixed die 25 and the other provided on the movable die 26, and the mold dividing surface of the movable die 26 of the mold 33 may be provided. It is provided at a position where it does not become inconvenient.

  In the fixed mold 25, when the mold 33 is in an open state at the position of the convex portion 85, at least one of the cavity forming part 30 of the fixed mold 25 and the cavity forming part 31 of the movable mold 26 is set. On the other hand, a release agent application nozzle 90 directed to the cavity forming portion 30 in the illustrated example is formed, and a release agent for supplying the release agent to the release agent application nozzle 90 is provided in the fixed mold 25. A mold supply channel 91 is formed.

  Although not shown, the release agent application nozzle 90 is also detachable from the fixed mold body excluding the release agent application nozzle 90 of the fixed mold 25. The release agent supply channel 91 is also connected to the release agent supply source 55 and the air supply source 56 via a cable bear or the like, and communicates with the release agent supply source 55 by an electromagnetic valve 92 and is also an air supply source. The state is not switched to the state 56, the state is not connected to the release agent supply source 55, and the state is not connected to either the release agent supply source 55 or the air supply source 56. Therefore, the release agent supply channel 91 also serves as an air supply channel for supplying air to the release agent application nozzle 90.

  The release agent supply source 55, the release agent application nozzle 90, and the release agent supply flow path 91 also constitute the release agent application device 61 described above. The release agent application device 61 includes the release agent application nozzle. 90 and a release agent supply channel 91 are provided in the fixed mold 25 of the mold apparatus 34. Specifically, a release agent application nozzle 90 is provided at the position of the convex portion 85 in the fixed mold 25, and a release agent supply channel 91 is provided in the fixed mold 25.

  In the movable mold 26, when the mold 33 is in the mold open state at the position of the recess 86, at least one of the cavity forming part 30 of the fixed mold 25 and the cavity forming part 31 of the movable mold 26 is set. On the other hand, a release agent application nozzle 95 directed to the cavity forming portion 31 in the illustrated example is formed, and a release agent for supplying the release agent to the release agent application nozzle 95 is provided in the movable die 26. An agent supply channel 96 is formed.

  Although not shown, the release agent application nozzle 95 is also detachable from the movable body excluding the release agent application nozzle 95 of the movable die 26. The release agent supply channel 96 is also connected to the release agent supply source 55 and the air supply source 56 via a cable bear or the like, and communicates with the release agent supply source 55 by an electromagnetic valve 99 and is also an air supply source. The state is not switched to the state 56, the state is not connected to the release agent supply source 55, and the state is not connected to either the release agent supply source 55 or the air supply source 56. Therefore, the release agent supply channel 96 also serves as an air supply channel for supplying air to the release agent application nozzle 95.

  The release agent supply source 55, the release agent application nozzle 95, and the release agent supply channel 96 also constitute the release agent application device 61 described above, and the release agent application device 61 includes the release agent application nozzle. 95 and a release agent supply channel 96 are provided in the movable mold 26 of the mold apparatus 34. Specifically, a release agent application nozzle 95 is provided at the position of the concave portion 86 in the movable mold 26, and a release agent supply channel 96 is provided in the movable mold 26.

  As shown in FIGS. 7 and 8, the transport mechanism 100 is provided between the fixed mold 25 and the movable mold 26 that are separated from each other when the mold is opened, so that the transport mechanism 100 can enter from above. The transport mechanism 100 receives the molded product S removed from the movable die 26 by being pushed out by the extrusion mechanism 41 and transports it upward.

  Further, as shown in FIG. 9, a separate release agent coating device 102 (another release agent coating device) enters from the side between the fixed mold 25 and the movable mold 26 that are separated when the mold is opened. It is provided as possible. The release agent application device 102 also applies the release agent to the cavity forming part 30 of the fixed mold 25 and the cavity forming part 31 of the movable mold 26. The release agent coating apparatus 102 is individually provided with a number of release agent application nozzles 103 capable of ejecting a release agent and a number of air nozzles 104 capable of ejecting air.

  Note that the concentration of the release agent may be different between the release agent application device 61 and the other release agent application device 102. Specifically, the release agent applied by the other release agent application device 102 is applied at the concentration of the release agent stock solution 1 to the water 30 and applied by the release agent application device 61 in the mold device 34. Let the mold release agent be the mold release agent stock solution 1 with respect to the water 70. In other words, the release agent coating device 61 in the mold device 34 can reliably aim at the pinpoint, so that the concentration can be lowered and economical. If the molded product has a relatively simple structure and the possibility of trouble is low, the concentration of the release agent stock solution 1 is set to the water 50 using the other release agent application device 102, and the narrow portion is reduced. If it is complicated, the release agent of the release agent application auxiliary device 61 in the mold device 34 is set to the concentration of the release agent stock solution 1 with respect to the water 30. Thereby, the mold release agent cost by the side of the cassette type mold release agent coating apparatus 102 can be suppressed.

  Although the release agent application device 61 and the separate release agent application device 102 provided in the mold device 34 are provided, the separate release agent application device 102 is not provided. It is also possible to apply the release agent only by the release agent application device 61 provided in the apparatus. Conversely, the release agent application device 61, a robot type release agent application device, and a link arm type release agent application device can be used in combination as appropriate. In addition, depending on the position where the mold release agent is applied to the mold 33 and the installation conditions such as interference with other mechanisms, the release agent application nozzle 45 and the release agent supply channel 46 of the guide post 18, The release agent application nozzle 75 and the release agent supply channel 76 on the holding surface 72, the release agent application nozzle 90 and the release agent supply channel 91 on the convex portion 85, the release agent application nozzle 95 on the concave portion 86, and You may select what is provided selectively from the mold release agent supply flow path 96.

  Next, several operation examples including a mold release agent application method of a molding system including the molding apparatus 11 including the release agent application apparatus 61, the transport mechanism 100, and the release agent application apparatus 102 are shown in the time chart of FIG. It explains along.

"First operation example"
The first operation example of the time chart shown in FIG. 10A is an operation example in which a separate release agent coating apparatus 102 is provided and used.

  After the step of injecting the molten metal into the cavity 32 of the mold 33 which is closed, the system control unit moves the movable mold 26 in the direction away from the fixed mold 25 by the toggle mechanism 21 and moves the mold 33. The process of opening the mold is started (at time t0). Prior to the end of the mold opening process (at time t2), the system control unit switches at least one of the set electromagnetic valves 57, 79, 92, and 99 of the release agent coating device 61 to release the mold. Of the mold application nozzles 45, 75, 90, and 95, the one that is directed to the fixed mold 25 is started to apply the release agent to the fixed mold 25 (at time t1). That is, of the movable mold 26 and the fixed mold 25, the fixed mold 25 side where the molded product S does not remain is provided via at least one of the set release agent supply channels 46, 76, 91, 96. The step of applying the release agent is started from the release agent application nozzle 45, 75, 90, 95 which is directed to the fixed die 25. The system control unit starts to lower the transport mechanism 100 between the movable mold 26 and the fixed mold 25 at the same time as the mold opening is completed (at time t2). That is, the process of removing and transporting the molded product S from the movable mold 26 where the molded product S remains is started.

  When the lowering of the transport mechanism 100 is completed, the system control unit starts taking out the molded product S including the extrusion of the molded product S by the push-out mechanism 41, and is set among the electromagnetic valves 57, 79, 92, and 99. Then, at least one of them is switched, and air is jetted from the release agent application nozzles 45, 75, 90, 95 directed to the fixed mold 25 to the fixed mold 25 (at time t3). When air is ejected to the fixed mold 25 for a predetermined time, the system control unit switches at least one of the electromagnetic valves 57, 79, 92, and 99 to switch the release agent application nozzles 45 and 75. , 90, 95, the air supply to the fixed die 25 is stopped (at time t4).

  When the removal of the molded product S is completed by receiving the molded product S extruded by the extrusion mechanism 41 as described above by the transport mechanism 100, the system control unit starts raising the transport mechanism 100 (at time t5). During the ascent of the transport mechanism 100, before the end of the lift of the transport mechanism 100 (at time t7), the system control unit moves from the side of the release agent coating apparatus 102 between the movable mold 26 and the fixed mold 25. Insertion is started (time t6). That is, before the step of removing and transporting the molded product S from the remaining movable mold 26 is completed, another release agent coating device 102 is inserted between the fixed mold 25 and the movable mold 26 that are opened. . When the insertion of the release agent application device 102 is completed, the system control unit starts application of the release agent from the release agent application device 102 to the movable mold 26 (at time t8).

  When the release agent is ejected from the release agent coating apparatus 102 to the movable mold 26 for a predetermined time, the system control unit ends the application of the release agent to the movable mold 26 from the release agent application apparatus 102 and releases the release agent. Air is ejected from the coating apparatus 102 to the movable mold 26 (at time t9). When air is ejected to the movable mold 26 for a predetermined time, the system control unit stops the ejection of the air from the release agent coating apparatus 102 to the movable mold 26 and at the same time, retracts the release agent coating apparatus 102 to the side. Start (time t10). When the retraction of the release agent coating apparatus 102 is completed, the system control unit starts closing the mold 33 that brings the movable mold 26 close to the fixed mold 25 by the toggle mechanism 21 (at time t11). When the mold 33 is closed (at time t12), the system control unit causes the injection device 40 to inject the molten metal into the cavity 32 to perform the next molding.

"Second operation example"
The second operation example of the time chart shown in FIG. 10B is also an operation example in the case where a separate release agent coating apparatus 102 is provided and used.

  After the step of injecting the molten metal into the cavity 32 of the mold 33 which is closed, the system control unit moves the movable mold 26 in the direction away from the fixed mold 25 by the toggle mechanism 21 and moves the mold 33. The process of opening the mold is started (at time t0). Prior to the end of the mold opening process (at time t2), the system control unit switches at least one of the set electromagnetic valves 57, 79, 92, and 99 of the release agent coating device 61 to release the mold. Of the mold application nozzles 45, 75, 90, and 95, the one that is directed to the fixed mold 25 is started to apply the release agent to the fixed mold 25 (at time t1). That is, of the movable mold 26 and the fixed mold 25, the fixed mold 25 side where the molded product S does not remain is provided via at least one of the set release agent supply channels 46, 76, 91, 96. The step of applying the release agent is started from the release agent application nozzle 45, 75, 90, 95 which is directed to the fixed die 25. The system control unit starts to lower the transport mechanism 100 between the movable mold 26 and the fixed mold 25 at the same time as the mold opening is completed (at time t2). That is, the process of removing and transporting the molded product S from the movable mold 26 where the molded product S remains is started.

  When the lowering of the transport mechanism 100 is completed, the system control unit starts taking out the molded product S including the extrusion of the molded product S by the push-out mechanism 41, and is set among the electromagnetic valves 57, 79, 92, and 99. Then, at least one of them is switched, and air is jetted from the release agent application nozzles 45, 75, 90, 95 directed to the fixed mold 25 to the fixed mold 25 (at time t3). When air is ejected to the fixed mold 25 for a predetermined time, the system control unit switches at least one of the electromagnetic valves 57, 79, 92, and 99 to switch the release agent application nozzles 45 and 75. , 90, 95, the air supply to the fixed die 25 is stopped (at time t4).

  When the removal of the molded product S is completed by receiving the molded product S extruded by the extrusion mechanism 41 as described above by the transport mechanism 100, the system control unit starts raising the transport mechanism 100 (at time t5). During the ascent of the transport mechanism 100, before the end of the lift of the transport mechanism 100 (at time t7), the system control unit moves from the side of the release agent coating apparatus 102 between the movable mold 26 and the fixed mold 25. Insertion is started (time t6). That is, before the step of removing and transporting the molded product S from the remaining movable mold 26 is completed, another release agent coating device 102 is inserted between the fixed mold 25 and the movable mold 26 that are opened. . Then, before the insertion of the release agent application device 102 is completed, the system control unit starts application of the release agent from the release agent application device 102 to the movable mold 26 (at time t21). That is, before the other mold release agent applicator 102 is completely inserted between the fixed mold 25 and the movable mold 26, the mold release agent starts to be applied from the other mold release agent applicator 102. .

  When the release agent is ejected from the other release agent application device 102 to the movable die 26 for a predetermined time, the system control unit applies the release agent before the insertion of the release agent application device 102 is completed (at time t23). At the same time as the application of the release agent from the apparatus 102 to the movable mold 26 is completed, the ejection of air from the release agent application apparatus 102 to the movable mold 26 is started (at time t22). When air is ejected to the movable mold 26 for a predetermined time, the system control unit stops the ejection of the air from the release agent coating apparatus 102 to the movable mold 26 and at the same time starts to retract the release agent coating apparatus 102 to the side. (At time t24). Then, when the retraction of the release agent coating apparatus 102 is completed, the system control unit starts closing the mold 33 that brings the movable mold 26 close to the fixed mold 25 by the toggle mechanism 21 (at time t25). When the mold 33 is closed (at time t26), the molten metal is injected from the injection device 40 into the cavity 32 to perform the next molding.

"Third example of operation"
A third operation example of the time chart shown in FIG. 10C is an operation example when the separate release agent coating apparatus 102 is not provided and when it is not used.

  After the step of injecting the molten metal into the cavity 32 of the mold 33 which is closed, the system control unit moves the movable mold 26 in the direction away from the fixed mold 25 by the toggle mechanism 21 and moves the mold 33. The process of opening the mold is started (at time t0). Prior to the end of the mold opening process (at time t2), the system control unit switches at least one of the set electromagnetic valves 57, 79, 92, and 99 of the release agent coating device 61 to release the mold. Of the mold application nozzles 45, 75, 90, and 95, the one that is directed to the fixed mold 25 is started to apply the release agent to the fixed mold 25 (at time t1). That is, of the movable mold 26 and the fixed mold 25, the fixed mold 25 side where the molded product S does not remain is provided via at least one of the set release agent supply channels 46, 76, 91, 96. The step of applying the release agent is started from the release agent application nozzle 45, 75, 90, 95 which is directed to the fixed die 25. The system control unit starts to lower the transport mechanism 100 between the movable mold 26 and the fixed mold 25 at the same time as the mold opening is completed (at time t2). That is, the process of removing and transporting the molded product S from the movable mold 26 where the molded product S remains is started.

  When the lowering of the transport mechanism 100 is completed, the system control unit starts taking out the molded product S including the extrusion of the molded product S by the push-out mechanism 41, and is set among the electromagnetic valves 57, 79, 92, and 99. Then, at least one of them is switched, and air is jetted from the release agent application nozzles 45, 75, 90, 95 directed to the fixed mold 25 to the fixed mold 25 (at time t3). When air is ejected to the fixed mold 25 for a predetermined time, the system control unit switches at least one of the electromagnetic valves 57, 79, 92, and 99 to switch the release agent application nozzles 45 and 75. , 90, 95, the air supply to the fixed die 25 is stopped (at time t4).

  When the removal of the molded product S is completed by receiving the molded product S pushed out by the extrusion mechanism 41 as described above by the transport mechanism 100, the system control unit starts raising the transport mechanism 100 and at the same time releasing the mold. Switching at least one of the set electromagnetic valves 57, 79, 92, 99 of the agent coating device 61 and directing it to the movable mold 26 of the release agent coating nozzles 45, 75, 90, 95 To start application of the release agent to the movable mold 26 (at time t5). That is, the release agent application nozzles 45, 75, 90, through at least one of the release agent supply channels 46, 76, 91, 96 on the movable die 26 side from which the molded product S is removed. The step of ejecting the release agent from the one directed to the movable mold 26 out of 95 is started. At the timing after the lifting of the transport mechanism 100 ends (time t31), the system control unit turns on at least one of the set electromagnetic valves 57, 79, 92, 99 of the release agent coating device 61. Switching and release of air from the release agent coating nozzles 45, 75, 90, 95 directed to the movable mold 26 to the movable mold 26 is started (at time t32). That is, the movable mold 26 of the release agent application nozzles 45, 75, 90, 95 is passed through at least one of the release agent supply channels 46, 76, 91, 96 after the release of the release agent. The process of supplying air to the one directed to

  When air is ejected to the movable mold 26 for a predetermined time, the system control unit switches at least one of the set electromagnetic valves 57, 79, 92, and 99 of the mold release agent coating device 61 to release the mold release agent. The ejection of air from the coating device 61 to the movable mold 26 is terminated. At the same time, the system control unit starts closing the mold 33 that brings the movable mold 26 close to the fixed mold 25 by the toggle mechanism 21 (at time t33). When the mold 33 is closed (at time t34), the molten metal is injected into the cavity 32 from the injection device 40 to perform the next molding.

  FIG. 10D is a time chart of a conventional apparatus that does not have the release agent coating apparatus 61 shown for comparison, and this will be described below.

  After the step of injecting the molten metal into the cavity 32 of the mold 33 which is closed, the system control unit moves the movable mold 26 in the direction away from the fixed mold 25 by the toggle mechanism 21 and moves the mold 33. The process of opening the mold is started (at time t0). And simultaneously with completion | finish of this type | mold opening process, the fall of the conveyance mechanism 100 between the movable mold | type 26 and the fixed mold | type 25 is started (time t41).

  When the lowering of the transport mechanism 100 is completed, the system control unit causes the extrusion mechanism 41 to start taking out the molded product S including the extrusion of the molded product S (at time t42). When the removal of the molded product S is completed by receiving the molded product S pushed out by the extrusion mechanism 41 by the transport mechanism 100, the system control unit starts to raise the transport mechanism 100 (at time t43). When the raising of the transport mechanism 100 is completed, insertion of the release agent coating apparatus 102 from the side between the movable mold 26 and the fixed mold 25 is started (at time t44). When the insertion of the release agent application device 102 from the side is completed, the release agent application device 102 starts application of the release agent to the movable die 26 (at time t45).

  When the release agent is ejected to the movable mold 26 for a predetermined time, the system control unit stops the application of the release agent from the release agent coating apparatus 102 to the movable mold 26, and the air is moved from the release agent coating apparatus 102. The ejection to the mold 26 is started (at time t46). When air is ejected to the movable mold 26 for a predetermined time, the ejection of the air from the release agent coating apparatus 102 to the movable mold 26 is stopped, and the retraction of the release agent coating apparatus 102 to the side is started (at time t47). When the withdrawal of the release agent coating apparatus 102 is completed, the system control unit starts closing the mold 33 that brings the movable mold 26 close to the fixed mold 25 by the toggle mechanism 21 (at time t48). When the mold 33 is closed (at time t49), the molten metal is injected into the cavity 32 from the injection device 40 to perform the next molding.

  As shown in FIG. 11, the release agent application nozzle 45 provided on the guide post 18 can be changed as follows.

  A plurality of release agent application nozzles 45 may be provided for one release agent supply channel 46.

  The ejection direction of the release agent from the release agent application nozzle 45 may be variable. Specifically, one of the release agent application nozzles 45 is arranged on the base end divided body 110 along the guide post 18, the intermediate divided body 111 connected to the base end divided body 110, and the ejection side connected to the intermediate divided body 111. Divided into a tip split body 112. Then, the intermediate divided body 111 is connected to the proximal end divided body 110 so as to be rotatable around the proximal end divided body 111. In addition, the distal end divided body 112 is connected to the intermediate divided body 111 so as to be rotatable about an axis along a direction orthogonal to the proximal end divided body 110 and the angle can be fixed with a hexagon bolt 113. Further, the other release agent application nozzle 45 is divided into a base end split body 120 on the connection side to the release agent supply flow path 46 and a tip end split body 121 on the ejection side, and these are divided into a silicon tube, a nylon tube or the like. And a flexible heat resistant tube or a bellows heat resistant tube. Then, the divided body 121 is fixed to the divided body 112. Thereby, the tip-end divided bodies 112 and 121 on the ejection side integrally change the angle. The tip split bodies 112 and 121 are joined together in the internal flow path, and the release agent and air supplied from the release agent supply flow path 46 are ejected from both of the tip split bodies 112 and 121.

  According to the present embodiment described above, the release agent application nozzle 45 and the release agent supply flow path 46 are provided in the guide post 18, and therefore a direction different from that provided in the case outside the mold apparatus 34. Therefore, the mold release agent can be injected into the cavity forming portions 30 and 31 of the mold 33 in the mold open state. Therefore, it is possible to satisfactorily apply the release agent to the cavity 32 even when the shape of the cavity 32 is complicated or the cavity 32 has a narrow portion. Therefore, it is possible to apply the release agent reasonably, and it is possible to realize excellent mold release properties of the molded product S, thereby improving the quality of the molded product S and reducing the molding cost. In other words, it is possible to improve the efficiency of the application of the release agent and reliably apply to the necessary part of the release agent, while shortening the release agent application time and to obtain a molded product S that is competitive in terms of quality and cost. it can. Further, since the release agent application nozzle 45 and the release agent supply channel 46 are provided in the guide post 18, they do not interfere with the movement of the movable die 26 and are not likely to fail. In addition, it is only necessary to perform some additional processing on the guide post 18 that is originally necessary, and the release agent application nozzle 45 and the release agent supply channel 46 can be easily provided at low cost. In addition, since the structure of the release agent application nozzle 45 and the release agent supply channel 46 can be simplified, it becomes difficult to break down and is excellent in maintainability.

  If a release agent application device 61 in which the release agent application nozzle 45 and the release agent supply flow path 46 are provided in the guide post 18 is provided, release by a cassette type release agent application device 102, a link type arm or a robot. There is no need to use other release agent application devices such as mold application devices, in which case there is no need to invest in release agent application devices by link-type arms or robots, and there is no need for standby areas for these devices. The process of taking these devices into and out of the mold is also unnecessary, which is advantageous for liberalizing the factory layout and shortening the cycle time.

  A mold release agent application nozzle 75 is provided at a position of the core covering portion 73 covered with the movable core 65 in a mold closed state of the mold 33, and a mold release agent supply channel 76 is provided in the mold 33. Therefore, it is only necessary to perform some additional processing on the mold 33, and the mold release agent application nozzle 75 and the mold release agent supply channel 76 can be easily and inexpensively provided in the mold apparatus 34. In addition, since the structure of the release agent application nozzle 75 and the release agent supply channel 76 can be simplified, it becomes difficult to break down and is excellent in maintainability. In addition, it is possible to provide the release agent application nozzle 75 and the release agent supply flow path 76 by effectively utilizing the position in the mold 33 where the cavity 32 is not formed in the closed state. In other words, the mold parting surface of a simple molded product mold is flat, but if the molding becomes complex, for example, if it is undercut, the core cannot be removed as it is, so the collapsible core Alternatively, a movable core 65 is used. In the case of the movable core 65, the pressing surface 72 of the movable core 65 is formed so as to intersect at right angles to the mold dividing surface. If the mold release agent application nozzle 75 is installed in the mold functional part such as the pressing surface 72 of the movable core 65 and the mold release agent supply path 76 connected thereto is provided in the mold 33, the mold release agent. Can be applied.

  In the mold 33, release agent application nozzles 90 and 95 and release agent supply channels 91 and 96 are provided in a convex portion 85 and a concave portion 86 that are fitted to each other at a position away from the cavity 32 when the mold is closed. Therefore, the mold 33 may be subjected to some additional processing, and the release agent application nozzles 90 and 95 and the release agent supply channels 91 and 96 are easily and inexpensively provided in the mold apparatus 34. Can do. In addition, since the structure of the release agent application nozzles 90 and 95 and the release agent supply channels 91 and 96 can be simplified, it becomes difficult to break down and is excellent in maintainability. In addition, the release agent application nozzles 90 and 95 and the release agent supply channels 91 and 96 can be provided by effectively utilizing the positions in the mold 33 where the cavity 32 is not formed in the closed state. For example, this is effective when it is desired to apply a mold release agent in addition to the originally existing mold function parts such as the guide post 18 and the pressing surface 72, or when the guide post 18 and the mold function part cannot be used.

  Since the release agent supply passages 46, 76, 91, 96 as air supply passages for supplying air to the release agent application nozzles 45, 75, 90, 95 are provided, the release agent application nozzles 45, Air is jetted from 75, 90, 95 to remove and clean the release agent remaining on the release agent application nozzles 45, 75, 90, 95. Therefore, dripping of the release agent from the release agent application nozzles 45, 75, 90, and 95 can be prevented. Further, by ejecting air from the release agent application nozzles 45, 75, 90, and 95 and repeating the molding, unnecessary materials such as a minute residue of the molding material adhering to the mold 33 can be removed. As a result, the release agent application nozzles 45, 75, 90 and 95 can also be used as air blow nozzles.

  If the ejection direction of the release agent of the release agent application nozzles 45, 75, 90, and 95 is variable, the release agent can be ejected toward an appropriate position by appropriately adjusting the ejection direction. Further, even if the heat spot moves or the design of the mold 33 is changed, it can be flexibly dealt with.

  Since the release agent application nozzles 45, 75, 90, and 95 are removable from the release agent supply channels 46, 76, 91, and 96, the time required for maintenance work such as disassembly and cleaning can be shortened. Since only the release agent application nozzles 45, 75, 90, and 95 need to be replaced when the setting of the diameter, the jetting direction, and the like is changed, the setting can be changed at low cost and in a short time. Therefore, it is possible to change the setting as appropriate to improve the application state of the release agent in a low cost and in a short time.

  If a plurality of corresponding release agent application nozzles 45, 75, 90, 95 are provided for one of the release agent supply channels 46, 76, 91, 96, the release agent is applied to a plurality of portions. Can be applied. That is, in general, the guide post, the mold functional part, and the mount are not large. In addition, it is not preferable to introduce a complicated mechanism to them. As the number of complicated mechanisms increases in the mold, the cause of the molding error exists in the mold, and the movable stop time becomes longer. Therefore, for example, it is not preferable to apply a release agent to a plurality of application sites by electrically driving one nozzle port. If a plurality of release agent application nozzles are provided in one release agent supply channel, the release agent can be applied to a plurality of sites without adopting such a structure.

  Of the movable mold 26 and the fixed mold 25, the mold release agent is provided through any of the mold release agent supply channels 46, 76, 91, 96 set in the fixed mold 25 which is a non-holding mold in which the molded product S does not remain. From the step of ejecting the release agent from the coating nozzles 45, 75, 90, and 95 which are directed to the fixed mold 25 and the movable mold 26 which is the holding mold in which the molded product S remains in a fixed state. The step of removing and conveying can be performed in parallel, and then any one of the release agent supply channels 46, 76, 91, 96 is set in the movable mold 26 which is the holding mold from which the molded product S is removed. Through this, the release agent can be ejected from the one directed to the movable die 26 which is the holding type of the release agent application nozzles 45, 75, 90, 95. Therefore, the process of removing the molded product S from the movable mold 26 as the holding mold and transporting it and the process of jetting the release agent into the stationary mold 25 as the non-holding mold can be performed in parallel, The cycle time can be shortened.

  If the release agent remains in the release agent application nozzles 45, 75, 90, and 95, it will drip after the mold is closed and cause molding defects. However, it is also used as an air supply flow path after the release of the release agent. If air is supplied to the release agent application nozzles 45, 75, 90, 95 via the release agent supply channels 46, 76, 91, 96, the release agent application nozzles 45, 75, 90, 95 This prevents dripping of the mold release agent. Further, if molding is repeated, a minute residue of the molding material may adhere to the mold 33 and remain. In order to remove these unnecessary materials, air blow can be performed after application of the release agent.

  When the molding apparatus is a reduced pressure casting apparatus, the remaining mold release agent may be sucked by a reduced pressure path installed in the mold 33. If comprised in this way, the residual mold release agent in the cavity 32 can be removed. In this case, as shown in the time chart of FIG. 12, the application of t32 is performed without performing the air supply performed at t3 to t4 in the above third operation example, and without performing the air supply performed at t32 to t33. After the process, the mold closing process is continuously performed, and when the mold closing of the mold 33 is finished (at time t34), the pressure reducing path installed in the mold 33 for a predetermined time (from time t34 to time t35) A vacuum process for sucking the remaining release agent is performed. Thereafter, the molten metal is injected from the injection device 40 into the cavity 32 to perform the next molding.

  In addition, this embodiment is not limited to the example shown in said specification content and drawing, It can change in a self-evident range. For example, in the above embodiment, the aluminum die-casting method has been described, but it is of course possible to apply this technique to resin molding, for example.

11 Molding device 18 Guide post 25 Fixed mold (non-holding mold)
26 Movable type (holding type)
30 Cavity forming part 31 Cavity forming part 32 Cavity 33 Mold 34 Mold device S Molded product 45, 75, 90, 95 Release agent application nozzle 46, 76, 91, 96 Release agent supply flow path 61 Release agent application Device 65 Movable core 73 Core covering portion 85 Convex portion 86 Concave portion 101 Conveying mechanism 102 Release agent coating device (other release agent coating device)

Claims (10)

A mold having a fixed mold and a movable mold and forming a cavity in a mold-closed state;
A guide post for guiding the movable movement;
A release agent coating nozzle provided in the guide post and directed to a cavity forming portion of the mold in a mold open state;
A molding apparatus provided in the guide post and having a release agent supply flow path for supplying the release agent to the release agent application nozzle. The mold is provided with a core that forms the cavity in the mold closed state, and a core covering portion that is covered with the core in the mold closed state,
At the position of the core covering part in the mold is provided with a release agent application nozzle directed to the cavity forming part of the mold in the mold open state,
The molding apparatus according to claim 1, wherein a release agent supply flow path for supplying a release agent to the release agent application nozzle is provided in the mold. The fixed mold and the movable mold are provided with a convex portion and a concave portion that are fitted to each other at a position away from the cavity when the mold is closed,
In the mold, a release agent application nozzle directed to the cavity forming part of the mold in the mold open state is provided at the position of at least one of the convex part and the concave part,
The molding apparatus according to claim 1, wherein a release agent supply flow path for supplying a release agent to the release agent application nozzle is provided in the mold.   The molding apparatus according to claim 1, further comprising an air supply channel that supplies air to the release agent application nozzle.   The molding apparatus according to claim 1, wherein the release agent application nozzle has a variable ejection direction of the release agent.   6. The molding apparatus according to claim 1, wherein the release agent application nozzle is removable from the release agent supply channel.   The molding apparatus according to claim 1, wherein a plurality of the release agent application nozzles are provided in one release agent supply channel. A molding method using the molding apparatus according to any one of claims 1 to 7,
Injecting molten metal into the cavity of the mold that is closed;
Moving the movable mold and opening the mold;
A step of injecting a release agent from the release agent application nozzle through the release agent supply channel to the non-holding die side where no molded product remains among the movable die and the fixed die;
Removing and transporting the molded product from the holding mold in which the molded product remains; and
And a step of jetting a release agent from the release agent application nozzle through the release agent supply flow channel to the holding mold side from which the molded product has been removed. A molding method using the molding apparatus according to claim 4,
Injecting molten metal into the cavity of the mold that is closed;
Moving the movable mold and opening the mold;
Applying a mold release agent from the mold release agent application nozzle to the non-holding mold side where no molded product remains among the movable mold and the fixed mold via the mold release agent supply flow path;
Removing and transporting the molded product from the holding mold in which the molded product remains; and
A step of ejecting a release agent from the release agent application nozzle to the holding mold side from which the molded product has been removed via the release agent supply flow path;
And a step of supplying air to the release agent application nozzle through the air supply channel after the release of the release agent.   The molding method according to claim 8, wherein the residual release agent is sucked by a decompression path installed in the mold.

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