WO2013132983A1

WO2013132983A1 - Die casting apparatus

Info

Publication number: WO2013132983A1
Application number: PCT/JP2013/053523
Authority: WO
Inventors: 岩本　典裕; 孝助半田; 俊加藤
Original assignee: 株式会社ダイレクト２１; 株式会社ケーヒン
Priority date: 2012-03-05
Filing date: 2013-02-14
Publication date: 2013-09-12
Also published as: JP2013184165A

Abstract

[Problem] Provided is a die casting apparatus configured so that a sensor, which can reliably and easily acquire information on the interior of the die such as gas pressure or metal pressure inside the cavity or metal temperature, can be easily fitted in the die. [Solution] A peninsular detection cavity into which molten metal is filled in the same manner as the product cavity is formed in continuity with the product cavity. The formation site of said peninsular section (detection cavity) is formed so as to protrude from the entrance portion of the exhaust pathway or from a selected surface portion of the die cast product and is formed at a position where the sensor measurement rod can be removed easily from the die. The sensor measurement rod is inserted here and gas pressure, metal pressure, or metal temperature is detected by the sensor.

Description

Die casting equipment

The present invention detects a resin pressure, a gas pressure, or a molten metal temperature in a die of a die casting machine for pressure casting a metal material such as an aluminum alloy or magnesium, or a molten metal in a mold for resin molding. The present invention relates to a die casting apparatus (including an injection molding machine) provided with a mold internal information measuring sensor suitable for determining the quality of a cast / resin molded product.

It is known that the quality of die-cast products is affected by the injection speed and injection pressure when filling a metal mold with molten metal. In the injection process of filling the mold with metal melt in the die casting machine, the metal melt is supplied to the plunger sleeve, and the plunger is driven at a low injection speed to avoid air entrainment of the metal melt, and the plunger sleeve and product liner Advance until the club is full. Next, when the plunger moves to a position where the tip of the molten metal reaches the gate of the mold, the plunger is switched to a high injection speed and driven to rapidly fill the cavity of the mold with the molten metal. Next, when the molten metal is filled in the cavity of the mold, the pressure of the plunger is increased to pressurize the molten metal.

Generally, as shown in FIG. 4, a mold used for a die casting machine is composed of a movable mold 1a and a fixed mold 1b. The cavity 2 formed by the two molds 1a and 1b is provided with a casting port 3a, a runner 3b, and a gate 3c following the injection cylinder, and a gas vent 4 and a sump 5 for venting the gas in the cavity 2. Is provided.

FIG. 5 is a cross-sectional view showing a state in which the mold cavity 2 is filled with molten metal in a die casting machine. In the figure, a predetermined amount of molten metal ML is supplied through a pouring port 6a of the plunger sleeve 6 using a ladle. This figure shows a state where the plunger 7 is driven at a low speed and injected from a state where a predetermined amount of the molten metal ML is supplied into the plunger sleeve 6. In the low-speed injection state, the gas G is present together with the molten metal ML in front of the plunger tip 7 a, and the gas G is also present in the runner 3 b that guides the molten metal ML in the plunger sleeve 6 to the cavity 2. Further, a position FP shown in FIG. 5 is a point at which the plunger 7 is switched from low speed movement to high speed movement. When the plunger tip 7a reaches this position FP, the molten metal ML is filled in the plunger sleeve 6 and the runner 3b, and the position where the tip of the molten metal ML reaches the gate 3c, that is, the molten metal ML to the cavity 2 is filled. This is a filling start position at which filling is started.

FIG. 6 is a diagram in which change waveforms of the injection speed J, injection pressure K, metal pressure L, gas pressure M, and metal temperature T of the plunger 7 during injection casting are displayed in time series along the time axis. In this figure, the injection pressure takes a substantially constant value while the plunger 7 is moving at a high injection speed. Thereafter, the filling pressure rises upon completion of filling, and rapidly rises due to the pressure increasing operation of the machine. On the other hand, while the plunger 7 is moving at a high injection speed, the metal pressure hardly increases, and when the molten metal ML in the cavity 2 is filled up, the pressure rises to almost the machine pressure, but the molten metal in the gate 3c is solidified. Start descent.

By the way, in the molten metal, a solidified film is formed when filling the oxide film or plunger sleeve. When the molten metal ML reaches the gate 3c and a solidified film or an oxide film crushed by an injection operation is caught in the gate part of the inlet during filling, the hot water supply is cut off, and the molten metal to the cavity 2 shown in FIG. The metal pressure does not increase, the curves B and C in a crumbled state are drawn in the middle, the regular metal pressure curve A is not reached, and the molded product is not pressurized, resulting in a defective product with many bubbles remaining inside. .

Approx. 95% of die-cast products are made mainly of aluminum and are produced by cold chamber die casting machines, but these mechanical properties (tensile strength, elongation) are not indicated in Japanese Industrial Standards (JIS). The main reason for this is that if the molten metal poured into the cold chamber gets caught in the gate part of the inlet by the solidified film or oxide film that has been crushed by the injection operation, the molten metal supply is cut off and the pressure is not transmitted. This is because there is a possibility that a large number of nests can be formed inside even if it is not different from a non-defective product, and a porous product can be formed, and mechanical properties cannot be evaluated in terms of quality. Such porous products have significantly poor mechanical properties.

In addition, because there are multiple vents in the mold cavity, it is very difficult to control the quality of the product by measuring the gas flow rate by attaching a gas flow meter to all the vent vents. Met. There is also a method of detecting the gas pressure from the gas vent, but burrs have adhered to the gas vent and stable detection has not been possible, and gas has also been discharged from the mating surface of the core, making detection impossible.

2. Description of the Related Art A technique is known that suppresses gas content in a die-cast product by casting by a vacuum die casting method, and reduces quality variations due to gas content in the die-cast product (see, for example, Patent Document 1). However, it was also difficult to measure the degree of vacuum.

Although conventional quality control of die casting is controlled based on data from the die casting machine side, there was almost no information management from the mold. If the gas in the mold cavity cannot be exhausted, the pressure inside the mold cavity will rise, but the defect rate will increase due to the influence of gas entrainment in the casting product, and there is a problem in quality.

If it can be determined for each casting shot whether or not the die-cast product has sufficient strength, it is possible to prevent the defective product from flowing to the subsequent process, and as a result, the yield can be improved. Therefore, when a molten metal such as an aluminum alloy is injected into a cavity formed in a mold using a die casting machine to cast a cast product, the pressure of the molten metal in the mold at the time of injection and It is necessary to measure the temperature of the molten metal and the gas pressure at which the gas in the cavity is compressed by the filling of the molten metal, and it is important for stable production of quality to surely release the gas in the cavity.

The necessity of detecting the metal pressure, temperature, and gas pressure in such a die casting machine is the same as in the case of resin molding using a mold.
As a technique for measuring the gas pressure and temperature in the cavity, those disclosed in Patent Documents 2 to 5 are known.

JP-A-8-332558 Japanese Utility Model Publication No. 62-109855 Japanese Utility Model Publication No. 60-146560 JP-A-8-294863 JP-A-9-141384

By the way, when detecting internal information such as metal pressure, temperature, and gas pressure directly from the mold cavity, it is necessary to expose the sensor detection end leading to the cavity to the mold cavity surface, and the detection path to the mold Need to drill. However, if it does in this way, the mark of the sensor detection end face will be attached to the product surface. In addition, since there are extrusion pins, cores, and cooling passages in the mold, there are many restrictions on adopting a structure in which the sensor is directly inserted into the cavity that becomes the product shape, and the detection pin of the sensor is There was a problem that it was difficult to take a space for insertion from the product surface to the outside of the mold in a straight line.

The present invention has been made paying attention to the above-mentioned problems, and a molten metal, resin, or the like supplied in a fixed amount in a plunger sleeve is pressurized and filled into a mold cavity by a plunger, and a product is cast and molded. Die casting equipment that makes it possible to reliably and easily acquire information inside the mold, such as gas pressure, metal pressure, or metal temperature, necessary for judging the quality of pressurized castings, and that can be easily attached to the mold. The purpose is to provide.

The present invention has been made from the following knowledge. A detection cavity for data detection, such as a peninsula filled with molten metal equivalent to the product cavity, is continuous with the product cavity to form a portion that can be cast as an extended part of the product. The formation place of this peninsula part (detection cavity) is formed so as to protrude from the inlet part of the exhaust passage and an arbitrary surface part of the die-cast product. This formation place is set to a position where the sensor measuring rod is linearly easily taken out of the mold. The sensor measuring rod is inserted into the detection cavity, and the gas pressure, metal pressure, or metal temperature is detected by the sensor.

That is, the present invention provides a detection cavity that is formed on the surface portion of the product cavity and is filled with molten metal, a sensor mounting hole that communicates with the detection cavity and the outside of the mold, and a detection end that is inserted into the sensor mounting hole. And a mold internal information measuring sensor in which a sensor for detecting at least one of a gas pressure, a molten metal pressure, and a molten metal temperature arranged in the cavity opening surface is incorporated in one rod-shaped casing. Yes.

Further, the present invention can be configured such that the detection cavity is formed at the inlet portion of the exhaust passage or formed in the middle of the product cavity surface from the gate to the exhaust passage.

The opening surface of the sensor mounting hole of the detection cavity is preferably formed so as to be orthogonal to the axis of the sensor measuring rod.
Further, the gas pressure sensor is disposed at the tip of the rod-shaped casing, and can be aligned with the detection cavity surface to separate the gas from the molten metal, and behind the porous filter. It is only necessary that the cavity gas introduction chamber provided through the porous filter and the pressure of the gas introduction chamber be detectable. The detection cavity preferably has a draft angle larger than that of the product cavity.

According to such a configuration, it is possible to obtain direct information of the molten metal filled in the product cavity through the detection cavity. The detection cavity can be formed at any location on the product surface, and in particular, a sensor mounting hole can be set in which the sensor is inserted in relation to the location where the sensor having the rod-type casing is easily placed outside the mold. Further, since the molten metal portion filled in the detection cavity is cut later, the sensor mark is not attached to the product. In particular, it is possible to acquire information inside multiple cavities with a single sensor, which can be placed avoiding obstacles around the cavity, so make a die-casting device with a highly useful tool for measuring information inside the mold. Can do.

It is a longitudinal cross-sectional view of the die-cast apparatus which concerns on 1st Embodiment. It is sectional drawing of the metal mold | die internal information measurement sensor employ | adopted as embodiment. It is a schematic diagram which shows the attachment form of a metal mold | die internal information measurement sensor. It is the perspective view which cut off the metal mold | die used for a die-casting machine partially. It is sectional drawing which shows the state which fills the metal cavity with the cavity of a metal mold | die. It is a figure which shows the metal pressure at the time of pressure casting, gas pressure, and mold temperature as a time series.

Hereinafter, embodiments of a die casting apparatus according to the present invention will be described in detail with reference to the drawings.
FIG. 1 shows a configuration diagram of a main part of the die casting apparatus of the present embodiment. The die casting apparatus basically includes a mold having a cavity, a gate-side passage that is disposed in the mold and serves as an inlet for injecting molten metal into the cavity, and an exhaust that is disposed in the mold and degass the cavity. It has a side passage. That is, as shown in FIG. 1, the die casting apparatus 10 has a mold 12 including a fixed mold 12a and a movable mold 12b. A product cavity 14 serving as a product mold is formed on the mating surface of the fixed mold 12a and the movable mold 12b. In the product cavity 14, a gate 16 for introducing the molten metal 28 extruded from the molten metal injection device 20 into the product cavity 14 is connected and opened. The molten metal injection device 20 is connected to the runner 17 of the mold 12 and includes a hollow sleeve 22 and a plunger 24 disposed in the sleeve 22. A molten metal 28 is supplied into the sleeve 22 from a molten metal supply device (not shown), and the molten metal 28 is injected into the product cavity 14 through the gate 16 by pushing out the plunger 24. The plunger 24 is operated by an injection driving means (not shown). Moreover, the exhaust side channel | path 18 is formed in the downstream side along the hot water flow direction in the product cavity 14 (upper position in FIG. 1). This exhaust side passage 18 becomes an outlet of the molten metal 28 filled in the product cavity 14 along with the injection, and performs gas venting.

Incidentally, in addition to the above basic configuration, in the present embodiment shown in FIG. 1, the molten metal 28 is filled in the inlet portion of the exhaust side passage 18 of the product cavity 14 similarly to the product cavity 14, and the product is extended. Thus, a detection cavity 50 is formed so as to overhang the gas pressure, the metal pressure, and the metal temperature in the same environment as the product cavity 14. The wall thickness of the overhang formed by this detection cavity is set to be the same as that of the product. In addition, the exhaust side passage 18 is connected and opened in the detection cavity 50, but a sensor mounting hole 52 that is openly connected to the detection cavity 50 is formed therethrough. In this embodiment, a mold internal information measuring sensor 100 in which sensors for detecting each of gas pressure, molten metal pressure, and molten metal temperature are housed in one rod-shaped casing is attached to the sensor mounting hole 52. The sensor may be a single sensor, and two types of sensors selected from a gas pressure sensor, a molten metal pressure sensor, and a molten metal temperature sensor may be incorporated in the rod, or three types of sensors may be incorporated in the rod as appropriate. .

The detection cavity 50 is formed so as to protrude from the surface of the product cavity 14. In this embodiment, the detection cavity 50 is an inlet portion of the exhaust side passage 18. It is formed to have the same width as the width. Therefore, the die-cast product cast by the mold 12 is die-cast from the mold 12 as a form in which the detection island corresponding to the detection cavity 50 is projected in addition to the original product form. This detection island portion is cut and removed after die cutting.

In the detection cavity 50, as described above, the sensor mounting hole 52 penetrating the outside of the mold 12 (particularly the movable mold 12b) is formed. The sensor mounting hole 52 is set at a position where a measuring rod 102 of the mold internal information measuring sensor 100, which will be described later, is linearly inserted into the mold or easily taken out of the mold. In particular, the opening surface of the sensor mounting hole 52 to the detection cavity 50 is formed so as to be orthogonal to the axis of the measuring rod 102. A region around the sensor mounting hole 52 of the detection cavity 50 is formed on a flat surface, and the sensor mounting hole 52 is set to open on the flat surface. As a result, the measuring rod 102 can be attached in a form in which the front end surface of the measuring rod 102 matches the surface of the detection cavity 50.

In addition, the detection cavity 50 has a draft larger than that of the product cavity 14. If the draft angle is small, scratches will be created when the die-cast product is taken out, resulting in a defective product, but in this embodiment, a large draft angle can be secured in the detection cavity, so there is no scratch at the time of take-out and the sensor tip is damaged. Nor.

The mold internal information measuring sensor 100 attached to the sensor mounting hole 52 is as follows.
FIG. 2 shows a cross-sectional configuration diagram of the mold internal information measuring sensor 100. The mold internal information measurement sensor 100 is inserted into the sensor mounting hole 52 and is attached to the front end surface of the detection cavity 50 so as to coincide with the surface of the detection cavity 50, and is provided at the base end of the measurement rod 102 and is movable. And a sensor block 104 positioned outside the mold 12b.

A fixing unit 110 including a bite joint 106 and a set screw 108 is slidably attached to the outer peripheral portion of the measuring rod 102 so as to correspond to the length of the sensor mounting hole 52. The position of the tip portion which is the detection end surface of the measuring rod 102 is adjusted so as to be flush with the surface 50s of the detection cavity 50, the set screw 108 is tightened in the sensor mounting hole 52 of the movable mold 12b, and the biting joint 106 is turned. Then, the measuring rod 102 is fixed at a fixed position by biting into the outer peripheral surface of the measuring rod 102.

As shown in FIG. 2, the measuring rod 102 has an outer cylinder casing 112 and a pressure transmission rod 114 disposed at the center of the measuring rod 102 along the axial direction. The pressure transmission rod 114 is a cylindrical body having an outer diameter smaller than the inner diameter of the outer cylinder casing 112, and an air passage 115 is formed between the outer cylinder casing 112 and the pressure transmission rod 114. At the distal end portion of the measuring rod 102, the inner diameter of the outer cylinder casing 112 is slightly enlarged, and the distal end of the pressure transmission rod 114 is also formed in a smaller diameter cross section than the rod main body portion. The porous filter 116 and the guide bush 118 are sequentially mounted. The porous filter 116 is made of a material having fine pores into which a molten metal such as aluminum such as alumina ceramics and carbon nanotubes does not enter. The end face of the measuring rod 102 is attached to the movable mold 12b with the end face of the outer cylinder casing 112 at the outermost periphery, the end face of the pressure transmission rod 114 at the center, and the porous filter 116 arranged concentrically between them. Thus, a part of the detection cavity 50 can be configured. The guide bush 118 is formed with a vent hole 119 that communicates between the vent path 115 and the porous filter 116 side. Thereby, the gas in the cavity 2 is separated from the molten metal by the filter 116 and can be introduced into the ventilation path 115.

Incidentally, the base of the measuring rod 102 is attached to the sensor block 104. The sensor block 104 has a rectangular block main body 120 as shown in FIG. In the block main body 120, a gas introduction chamber 122 is formed to open on one surface, and a first sensor chamber 126 is formed on the opposite surface so as to be aligned on the same axis with the partition wall 124 therebetween. The partition wall 124 is formed with a through hole that communicates the gas introduction chamber 122 and the first sensor chamber 126.

The measuring rod 102 is attached to such a sensor block 104. A base end portion of the outer cylinder casing 112 is mounted in a casing mounting hole 122a formed to expand at the inlet opening of the gas introduction chamber 122, and is joined by welding at a corner portion between the casing outer periphery and the block main body 120.

Further, the base end of the pressure transmission rod 114 in the measuring rod 102 is longer than the outer cylinder casing 112, and this base end portion extends through the through hole of the partition wall 124 and extends to the first sensor chamber 126. . The through hole supports the pressure transmission rod 114 with a bearing while sealing a gap with the pressure transmission rod 114 with an O-ring 130. Therefore, the pressure transmission rod 114 is supported at two points by the guide bush 118 provided at the inner periphery of the tip end portion of the outer cylinder casing 112 and the through hole provided in the partition wall 124 of the sensor block 104, and It can move in the axial direction inside. When the tip of the pressure transmission rod 114 receives pressure, the pressure transmission rod 114 is pressed in the axial direction and moved toward the opening side of the first sensor chamber 126 of the sensor block 104.

The pressure transmission block 134 and the load cell 136 are laminated on the end surface of the proximal end portion of the pressure transmission rod 114 so as to face each other. Meanwhile, the sensor block 104 has an opening of the first sensor chamber 126 facing the back surface of the load cell 136 so that the stacked pressure transmission block 134 and the load cell 136 are sandwiched between the pressure transmission rod 114. A block lid 132 is attached. Thereby, the force received at the tip of the pressure transmission rod 114 is transmitted to the load cell 136 using the inner surface of the block lid 132 as a support surface, and the load can be detected. Thereby, the metal pressure of the molten metal filled in the cavity 2 can be measured.

On the other hand, the air passage 115 formed between the outer cylinder casing 112 of the measuring rod 102 and the pressure transmission rod 114 is communicated with the gas introduction chamber 122 inside the sensor block 104. As shown in FIG. 2, the sensor block 104 has a second sensor chamber 138 that is open to the outer peripheral surface of the block that communicates with the gas introduction chamber 122. A gas pressure sensor 140 is disposed in the opening of the second sensor chamber 138 so as to seal the opening. As the gas pressure sensor 140, for example, a piezoelectric load detection sensor using a ceramic piezoelectric element is used, and the second sensor chamber 138 is sealed with a sensor fixing bolt 144. As a result, the gas in the cavity 2 introduced through the porous filter 116 on the distal end side of the measuring rod 102 is introduced into the second sensor chamber 138 from the gas introduction chamber 122 via the ventilation path 115, and the gas pressure sensor 140. The pressure can be measured.

Incidentally, a purge air introduction hole 146 is opened in the gas introduction chamber 122. A compressed air supply pipe 148 is connected to the purge air introduction hole 146 so that compressed air can be supplied from a compressed air source (not shown) outside the system. Thereby, compressed air can be flowed through the gas introduction chamber 122 to the porous filter 116 described above, and clogging of the porous filter 116 can be checked.

Further, a pore 150 is formed in the axial core portion of the pressure transmission rod 114 described above. The pore 150 is opened at the center of the tip of the pressure transmission rod 114, and this is used as a metal temperature detection end 151. The metal temperature detection end 151 is made of an SKD material to prevent melting damage, and a detection portion of a thermocouple 152 is embedded. A lead wire 158 of a thermocouple 152 is routed inside the pore 150, and the lead wire 158 is led out of the block through a cut groove 160 formed at the proximal end of the pressure transmission rod 114.

In the embodiment, a terminal box 162 is attached to the sensor block 104, and various lead wires of the load cell 136, the gas pressure sensor 140, and the thermocouple 152 are led here. And each sensor is connected to the measuring device which is not illustrated via the terminal box 162, predetermined measurement data can be output, and it can display on a display means as needed.

In such a mold internal information measuring sensor 100, in the embodiment, the measuring rod 102 is inserted into the sensor mounting hole 52 formed in the movable mold 12 b, and the tip surface thereof is flush with the surface of the detection cavity 50. And fixed in place by the fixing unit 110. When the injection operation is started after the mounting is completed, the molten product is filled in the product cavity 14 and at the same time the detection cavity 50 is also filled. At this time, the metal pressure of the molten metal acts on the tip of the measuring rod 102 facing the detection cavity 50, the pressure transmission rod 114 is pushed, and this force is detected by the load cell 136. At the same time, gas inside the cavity is introduced into the gas introduction chamber 122 through the porous filter 116 through the air passage 115, and the gas pressure is detected by the gas pressure sensor 140. Further, the metal temperature detection end 151 provided at the tip of the pressure transmission rod 114 detects the molten metal temperature. These data are measured in a time series by a measuring instrument, and the gas pressure in the mold, the metal pressure, and the metal temperature as shown in FIG. 6 are measured.

According to such an embodiment, a peninsular detection cavity 50 continuous with the product cavity 14 is formed in addition to the product cavity 14, and the gas pressure, the molten metal pressure, and the molten metal temperature are detected with respect to the detection cavity 50. The mold internal information measuring sensor 100 in which a plurality of sensors are built in one rod-shaped casing is mounted. Therefore, since the measurement position can be arbitrarily selected without affecting the product shape, it is a position that avoids the push pin and the cooling passage built in the mold 12 and is in a straight line to the outside of the mold. It is possible to freely form the sensor mounting hole 52 to be communicated. FIG. 3 shows a plurality of forms of the mounting state of the mold internal information measuring sensor 100. This figure is a schematic view of the movable mold 12b as seen from the front. Four tie bars 172 are attached to the die plate 170 that holds the movable mold 12b, and the mold pin is also attached to the movable mold 12b. A plurality of 174 are attached. Since the detection cavity 50 attached to the product cavity 14 can be arbitrarily formed, the insertion direction of the measuring rod 102 can be arbitrarily set in a direction to avoid obstacles such as the tie bar 172 and the mold pin 174 (

Sensor positions

100A, 100B, 100C, 100D). As a result, as shown in FIG. 3, the sensor mounting hole 52 of the measuring rod 102 can be arbitrarily selected in a plurality of directions. From this, one die internal information measuring sensor 100 is used in the case of a single die-casting device. However, since a plurality of installation directions can be arbitrarily selected, it is possible to cope with a case of taking a plurality of die. ing.
Therefore, the in-cavity information can be reliably acquired through the above-mentioned mold inside information measuring sensor 100 attached at an arbitrary position while avoiding the space limitation.

As described above, according to the present embodiment, since the detection cavity 50 may be formed at an arbitrary position of the product cavity 14, sensor mounting restrictions are greatly reduced, so that sensor mounting flexibility is increased and convenience is increased. Is even better.

In addition, although this embodiment demonstrated the case where the metal mold | die internal information measurement sensor 100 was attached to the movable metal mold | die 12b, of course, it is also applicable to the fixed metal mold | die 12a. Moreover, although the example which formed the detection cavity 50 in the inlet_port | entrance part of the exhaust-side channel | path 18 was shown, the arbitrary locations which follow a product cavity, for example, the product cavity 14 surface from the injection gate 16 to the exhaust-side channel | path 18, are shown. It can be formed on the way. Furthermore, in the above-described embodiment, an example in which the mold internal information measurement sensor includes three types of gas pressure sensor, metal pressure sensor, and metal temperature sensor in one measurement rod 102 is shown. It only has to be built in that kind. It can be selected according to the type of cavity information to be detected.

10 ......... Die-casting device, 12 ......... Mold, 12a ......... Fixed die, 12b ......... Moveable mold, 14 ......... Product cavity, 16 ......... Gate, 18 ...... Exhaust side passage , 20 ......... Molten metal injection device, 22 ... ... Sleeve, 24 ... ... Plunger, 50 ... ... Detection cavity, 52 ... ... Sensor mounting hole, 100 ... ... Mold internal information measuring sensor, 102 ... ... Measurement rod 104 ...... Sensor block 106 ......... Screw joint 108 ......... Set screw 110 ......... Fixing unit 112 ... External casing 114 ......... Pressure transmission rod 115 ... ...... Air passage, 116 ......... Porous filter, 119 ......... Vent hole, 120 ......... Block body, 122 ......... Gas introduction chamber, 122a ......... Case mounting hole, 124 ......... Partition wall, 126 ...... First sensor chamber, 130 ......... O-ring, 132 ......... Block lid, 134 ......... Pressure transmission block, 136 ......... Load cell, 138 ......... Second sensor chamber, 140 ......... Gas pressure Sensor, 142 ......... Pressure block, 144 ......... Sensor fixing bolt, 146 ......... Purge air introduction hole, 148 ......... Compressed air supply pipe, 150 ......... Narrow, 151 ......... Metal temperature detection end, 152... Thermocouple, 158... Lead wire, 160 ... Cut groove, 162 ... Terminal box.

Claims

A detection cavity formed on the surface of the product cavity and filled with molten metal, a sensor mounting hole communicating with the detection cavity and the outside of the mold, and a detection end inserted through the sensor mounting hole as a cavity opening surface of the sensor mounting hole A die casting apparatus comprising: a die internal information measuring sensor in which a sensor for detecting at least one of a gas pressure, a molten metal pressure, and a molten metal temperature is built in one rod-shaped casing.
2. The die casting apparatus according to claim 1, wherein the detection cavity is formed at an inlet portion of the exhaust passage.
2. The die casting apparatus according to claim 1, wherein the detection cavity is formed in the middle of the surface of the product cavity from the gate to the exhaust passage.
2. The die casting apparatus according to claim 1, wherein an opening surface of a sensor mounting hole of the detection cavity is formed to be orthogonal to an axis of the sensor measurement rod.
The die casting apparatus according to claim 1, wherein the detection cavity has a draft angle larger than that of the product cavity.