KR20020037678A - Die cast apparatus - Google Patents

Abstract

PURPOSE: To develop a drastic die casting apparatus with which a small size thin die casting product can be produced. CONSTITUTION: The die casting apparatus is peculiarly constituted of a die casting machine (B) having a die (1) for die casting and a die sleeve (26) incorporated in an engraving portion (19) formed in a fixed plate (20) fitted to a fixed die (1a) in the die (1) for die casting and arranging a molten metal receiving sprue (28) in the above engraving portion (19), and a melting furnace (2) having a crucible (40) for holding the molten metal, disposed so as to be approachable/ separatable to the die casting machine (B), a molten metal supplying pump (17) disposed in the crucible (40) and a runner tube (3) connected with a spouting hole (49b) of the molten metal supplying pump (17) at the one end (60) and connected so as to be able to position with the molten metal receiving sprue (28) of the die sleeve (26) in the die (1) for die casting at the other end (64) so as to supply the molten metal (5).

Description

Die cast apparatus

The present invention relates to a diecasting apparatus most suitable for producing an ultra-small and ultra-thin diecast product.

Die-cast products are widely used in a variety of mechanical parts because they can mass produce complex shaped metal products. In recent years, from the excellence of the moldability, application to small thin die-cast products such as a "mobile phone frame" and a "digital camera body" is actively performed, and it is impossible to cope with a conventional die-cast apparatus, · Die-casting apparatus capable of responding to thin die-casting products is required.

Moreover, not only the high performance of the product, but also the low price of the product due to the recent globalization are putting pressure on the reduction of the labor cost, which is pressing the enterprise, and the automation of the diecast device and the depletion of skilled workers or unskilled foreign workers As the number of devices increases, demands for ease of use and management of devices are increasing, and the cost performance of the entire die-casting device becomes more important.

The development of a breakthrough diecast apparatus that can cope with such a situation is a problem of the present invention.

The die-casting apparatus A of "claim 1" has a concave portion 19 formed in the "die-cast die 1 and the fixed die plate 20 to which the fixed die 1a of the die-cast die 1 is attached. And a die caster (B) having a mold sleeve (26) formed with a water immersion hole (28) in the concave portion (19), and installed so as to be spaced close to the die caster (B). The one end 60 is connected to the crucible 40 for holding the molten metal, the hot water pump 17 provided in the crucible 40, and the pump discharge port 49b of the hot water pump 17, and the other end 64. ) Is composed of a melting furnace (2) having a tap water pipe (3) adapted to be alignably connected to the tap opening (28) of the mold sleeve (26) of the die cast mold (1) and to supply the molten metal (5). It is characterized by.

In addition, "Claim 2" further advances the die-casting device (A) of "Claim 1", which is linked to "die-casting machine (B), and die-casts from die-casting die (1) at the time of mold opening. The product take-out machine T which takes out (D) is attached to the die-casting machine B. "

Claim 3 further advances this, and the raw material metal supply apparatus F which supplies the die-cast metal ingot 18 to the melting furnace 2 according to the number of product shots of the die-casting machine B is carried out. Is attached to the melting furnace 2 ”.

In addition, "claim 4" relates to the control of the die-casting apparatus A of "claim 1", and the "control of the entire die-casting apparatus A is concentrated in the whole control part S of the die-casting machine B, That is,

According to this, since the die sleeve 26 is accommodated in the recessed part 19 formed in the fixed die plate 20, and the water supply hole 28 is formed in the said recessed part 19, the conventional die-casting machine Compared with the mold sleeve 26 'of (B'), the sleeve length L can be significantly shortened, and as described later, a high sleeve filling rate and high-speed injection can be achieved, and the flow of the molten metal 5 in the cavity is achieved. This high speed eliminates hot water circulation even in the ultra-thin product D.

Moreover, as shown in FIG. 6, the die sleeve 26 'of the conventional die-casting machine B' fixes the nozzle part 6 'for supplying the molten metal 5', and the die plate 20 '. ), The mold sleeve 26 'protrudes from the rear end 20a' of the fixed die plate 20 'to the rear by L1', and the water sluice hole formed in the protruding portion L1 '. 28 ') of the molten metal 5'. Therefore, the sleeve length L 'of the mold sleeve 26' of the conventional die-casting machine B 'becomes inevitably longer than the sleeve length L of this invention, and the melt depth p' is the present invention. It becomes shallower than the molten metal depth (P) of. Therefore, in the conventional example, the sleeve filling rate is low, and high-speed injection becomes impossible. Therefore, manufacture of an ultra thin and small die-cast product becomes impossible.

Moreover, the hot water pump 17 arrange | positioned in the melting furnace 2 and the furnace, the hot water supply pipe 17 which connects the hot water pump 17, and the die-casting die 1, and the raw metal which is attached to the melting furnace 2 as needed. The accessory equipment of the die caster B, such as the product take-out machine T attached to the supply apparatus F and the die caster B, is to be uniformly controlled by the whole control part S of the die caster B. As a result, even an inexperienced person can easily manage the apparatus A. FIG.

1 is a schematic front view of the apparatus of the present invention.

2 is a plan view of FIG.

3 is a cross-sectional view showing a hot water supply completion state to a mold sleeve of the apparatus of the present invention.

4 is a plan view illustrating a rotation state of a tap water pipe of the apparatus of the present invention.

5 is an enlarged cross-sectional view of a water pipe portion of the apparatus of the present invention.

6 is an enlarged cross-sectional view of a conventional mold sleeve portion.

Explanation of symbols on the main parts of the drawings

1: die cast mold 2: melting furnace

3: hot water pipe 4: heater

5: molten metal 6: nozzle part

7: water storage part 8: heater part for water storage part

13 middle part 14 heater part for a water absorption part

15: heater part for intermediate part

EMBODIMENT OF THE INVENTION Hereinafter, it demonstrates according to the Example which showed this invention. The die-casting apparatus (A) of the present invention is provided in a melting furnace (2) and a melting furnace (2) for dissolving the die-casting machine (B) and the raw material metal at a predetermined hot water temperature to send the molten metal (5). Ingot type in the die-cast hot water supply apparatus C and the melting furnace 2 which consist of the pump 17 and the water supply pipe | tube 3 which supplies the molten metal 5 from the melting furnace 2 to the die-casting die 1. The conveying apparatus F which inject | pours the die-cast metal cold ingot 18 supplied to the said product, the product take-out T for taking out the die-cast product D from the die-caster B, and the die-cast product which was taken out (D) ) Is composed of a conveyor (H) for conveying.

First, the outline | summary of the die caster B is demonstrated. The movable die plate 22 is reciprocally arranged in the support bar 21 (tiebar) constructed between the fixed die plate 20 and the teal stock (not shown), and the fixed die plate 20 and the moving die plate ( The fixed mold 1a and the moving mold 1b are attached to the metal mold | die installation surface of 22) so that mold opening and mold fastening are possible. And the temperature sensor 23 (24) and the mold heater 25 are arrange | positioned at the said fixed metal mold 1a and the moving metal mold 1b, and the temperature control of the die cast metal mold 1 is performed.

The mold sleeve 26 is arrange | positioned from the stationary die plate 20 to the stationary die 1a and the moving die 1b, and the injection piston 27 is inserted so that reciprocation is possible. A water tap 28 is formed on the upper surface of the mold sleeve 26. In addition, the mold sleeve 26 and the temperature sensor (not shown) are arrange | positioned in the metal mold sleeve 26, and the temperature of the metal mold sleeve 26 is adjusted. The cooling sleeve 30 is also provided in the mold sleeve 26.

The mold sleeve 26 is housed in a recess 19 formed in the fixed die plate 20, and the water tap 28 is located in the recess 19. Therefore, as described above, the overall length L of the mold sleeve 26 is significantly shorter than that of the conventional mold sleeve 26 '. Therefore, as for the height P of the molten surface of the molten metal 5 filled from the bottom face part of the metal mold sleeve 26, the metal mold sleeve 26 which concerns on this invention becomes large, and a sleeve filling rate becomes high. Therefore, the exposed surface area per unit area of the filling molten metal 5 in the metal mold sleeve 26 is greatly reduced compared with the conventional example, and oxidation of the filling molten metal 5 in the metal mold sleeve 26 is reduced. Furthermore, since the length L of the mold sleeve 26 is shortened, if the injection speed of the injection piston 26 is the same, injection is completed in a shorter time, so that the injection speed is increased by that much, and the flow of water in the cavity is increased. You can increase the speed.

The total length L of the mold sleeve 26 refers to the length from the inner end of the mold sleeve 26 to the tip of the injection piston 27 located at the retreat limit, but is not limited thereto. In this embodiment, the tip of the injection piston 27 located at the retreat limit is set to be inward from the end of the concave portion 19.

Moreover, the heat insulation layer 36 which consists of a heat insulating material is arrange | positioned between the stationary die 1a and the stationary die plate 20, and the heat conduction from the stationary die 1a to the stationary die plate 20 is suppressed, As a result, the molten metal 5 injected and filled into the cavity is prevented from rapidly losing heat to the fixed mold 1a and solidifying. By doing in this way, a hot water can fully be circulated even in the extremely narrow space | gap of the cavity which forms an ultra-thin part, and it was made possible to respond to the thinning of die-casting product D from the metal mold side.

The concave portion 19 of the fixed die plate 20 is capable of entering not only the mold sleeve 26 but also the nozzle portion 6 formed at the distal end of the water pipe 3, which will be described later, into the fixed die plate 20. It is formed in size and shape.

The melting furnace 2 is arrange | positioned so that the wheel 35 can reciprocate on the rail 31. As shown in FIG. The reciprocating movement of the melting furnace 2 rotates the rotary gear 34 which meshes with the rail gear 33 arranged in parallel with the rail 31 by rotating the moving handle 32 provided in the melting furnace 2. By rotating and stopping. In addition, stopping is performed by a brake apparatus (not shown).

The crucible 40 holding the molten metal 5 is formed in the melting furnace 2, the mounting table 42 is provided on the ceiling 41 of the crucible 40, and the mounting table 42 is provided with a piston 57 for hot water supply. The hot water cylinder 43 for driving), and the rotary actuator 45 for driving the switching valve 44 are provided. The hot water cylinder 43 is connected to the piston rod 57a of the hot water piston 57 through the coupling 46. In the crucible 40, a hot water supply pump 17 for hot water supply is provided, and the hot water supply piston 57 is inserted into a pump cylinder portion 48 provided on the ceiling 41 of the hot water supply pump 17.

The connection end 60 of the tap water pipe 3 mentioned later is connected to the pump discharge port 49a provided in the end part of the pump body 47 of the hot water pump 17, and is in communication with the pump cylinder part 48. As shown in FIG. The switching valve 44 which opens and closes the communication hole 49 is arrange | positioned at the connection end 60 of the tap water pipe 3, and the communication hole 49 of the pump cylinder part 48, The said rotary actuator 45 ) In addition, supply of the molten metal 5 to the pump cylinder part 48 is carried out when the hot water piston 57 moves from a bottom dead center (lowest position) to a top dead center (topmost position), and the molten metal suction port 44a of the switching valve 44 is carried out. ) By sucking the molten metal (5). The molten metal suction port 44a communicates with the communication hole 49a on the side of the pump cylinder 48 and the crucible 40 when the communication hole 49 is closed, so that the pump cylinder 48 of the molten metal 5 in the crucible 40 is opened. Enable suction into.

In addition, for example, the raw material metal ingot 18 like an ingot is performed through the injection door 53 of the material input part 52 formed in the ceiling part 41. As shown in FIG. Moreover, in the ceiling part 41 of the material input part 52, the partition plate 54 which divides the crucible 40 over substantially the whole width | variety is arrange | positioned so that a vertical installation and the jump are possible, and the crucible 40 is injected | thrown-in. It divides into the part just under the part 52 and the hot water supply side, and the floating matter (not shown) which generate | occur | produced in the part just under the material input part 52 does not flow to the hot water supply side. Moreover, hot water temperature in the crucible 40 is always monitored by the crucible thermometer 55. Moreover, a burner (not shown) is provided in the melting furnace 2, and melting of the input metal cold ingot 18, maintenance of hot water, etc. are performed. The furnace 2 is filled with an anti-oxidation gas (for example, hexafluoride mixed gas), and is supplied from the gas supply pipe 56 formed in the ceiling 41.

The water inlet pipe 3 connects the die casting mold 1 and the melting furnace 2 to supply the molten metal 5 of the melting furnace 2 to the die casting mold 1, and is, for example, a molten stainless steel at the center. The conduit 61 passes through, the heater 4 is wound around it, and the heat insulating member 62 is wound around it. The molten metal immersion side end of the molten metal conduit 61 is a convex hemispherical connection end 60, and is pressed against a concave hemispherical pivot seat 63 provided at the pump discharge port 49b of the pump body 47. It is fitted. The other end of the molten metal conduit 61 is connected to a hot water jet nozzle 64 inserted into the nozzle portion 6 at the tip of the hot water conduit 3.

The water inlet pipe 3 connects the die casting mold 1 and the melting furnace 2 to supply the molten metal 5 of the melting furnace 2 to the die casting mold 1, but the shape thereof is not particularly limited. Of the vertical section 65 extending through the ceiling 41 of the melting furnace 2 to the pivot sheet 63, the horizontal section 66 extending horizontally from the upper end of the vertical section 65, and the horizontal section 66. It consists of the inclined part 67 extended inclined from the front-end | tip, and the connection part 68 extended in a slightly low inclination from the inclined part 67, and connected to the hot water supply nozzle 64. As shown in FIG.

The heater 4 of the tap water pipe 3 is divided into three areas. As the first region, a portion of the inclined portion 67 and the horizontal portion 66 subsequent thereto, that is, the range shown by (7) of FIG. 5 (this portion is referred to as the water storage portion 7) and the horizontal subsequent thereto Most of the portion 66 and the inside of the vertical portion 65, the range reaching the melting furnace 2 (this portion is referred to as the middle portion 13), and the lower portion from the ceiling 41 of the melting furnace 2 The portion is divided into a hot water unit 12), and each of the regions 7, 12, and 13 has a heater unit 8 for the hot water unit, a heater unit 15 for the middle unit, and a heater unit 14 for the water unit. And temperature sensors 69, 70, and 71 are mounted, and are each independently temperature controlled. The size of the bottom portion 7 is 1 to 2 times the injection weight of the die cast product 1 (for example, when the weight of the die cast product D is 100 to 150 g, the amount of the water in the bottom portion 7 is Range from about 180 to about 200 g).

The nozzle part 6 is obliquely penetrated by the hot water supply nozzle 64 connected to the connection part 68 of the molten metal conduit 61 at the distal end portion of the hot water pipe 3, and an inert gas such as nitrogen gas at the upper end thereof. A gas pipe 72 for supplying the gas is connected. Moreover, the nozzle part heater 11 and the temperature sensor 73 are provided in the nozzle part 6 independently.

The vertical portion 65 of the molten conduit 61 is only inserted from the ceiling 41 into the interior of the melting furnace 2 and is pressed by the pivot sheet 63 as its own weight and the connecting end 60 is rotated about it. Only the support arm 16 for supporting the molten metal conduit 61 is provided in the ceiling part 41 because it is supposed to be. The support arm 16 is pivotally mounted to the support shaft 80 provided on the ceiling 41, and one end thereof is rotatably mounted on the support shaft 80, and the other end of the rotation arm portion 81 supports the support arm 16. Consists of

In the melting furnace 2, the raw material supply device F attached to the melting furnace 2 stocks the die-cast metal 18 supplied to the ingot and is mounted on the die-casting machine B. ), The die cast metal 18 is automatically supplied to the melting furnace 2 gradually by the conveyer conveyor 85 by the instruction (the number of shots and / or hot water level mentioned later).

Moreover, the product take-out machine T is attached to the said die caster B as needed, and the die cast product D is taken out from the die-casting die B opened. The extraction method is generally a system in which a biscuit of a cooled and solidified die-cast product (D) is sandwiched and taken out of the cavity. Moreover, the conveying apparatus H is provided beside the product take-out machine T, and the die-cast product D taken out is sent. The conveying apparatus H is provided with the detection apparatus of the die-cast product D, for example, and when a die-cast product D is sent to the conveying apparatus H, it detects this and operates. On the other hand, the product take-out machine T is made to operate based on the instructions from the die-casting machine B. As shown in FIG.

As described above, in the present invention, the control of the die-casting apparatus A aggregates the control of the series of apparatuses attached to the local control unit S11 of the die-casting machine B, so that the entire control unit S is controlled as a whole. Uniform control. That is, the injection into the crucible 40 of the die cast metal 18 from the raw material supply apparatus F provided as needed is managed by the shot number of the melting furnace 2, and when it reaches a set shot number, it die-casts Injection of the metal 18 is performed. At the same time, the hot water level is also detected by a hot water height detection device (not shown), and the hot water height is less than or equal to the set height, the injection of the die-cast metal 18 is commanded, If the inconsistency is large, an alarm such as hot water leak ("dissolution due to dissolution") will be issued.

Moreover, although the hot water pump 17 and the hot water supply pipe 3 connected to this are provided in the melting furnace 2, the hot water cylinder 43 which operates the hot water piston 57 of this hot water pump 17, Hot water supply / suction operation of the switching valve 44 rotary actuator 45 which opens and closes the communication hole 49 is also performed by the instruction | command from the whole control part S. As shown in FIG.

Briefly explaining the suction operation, when the switching valve 44 is rotated to bring the communication hole 49 to the closed state, the communication hole 49a in the crucible 40 and the pump cylinder 48 side communicate with each other. In this state, when the hot water supply piston 43 is operated to move the hot water supply piston 57 from the bottom dead center (lowermost position) to the top dead center (topmost position), the molten metal 5 in the crucible 40 is pumped. Suction into the cylinder 48.

On the contrary, the hot water supply operation reverses the switching valve 44 to operate the hot water supply cylinder 43 while the communication hole 49 is opened, and the hot water supply piston 57 is moved from the top dead center (topmost position). When it moves to a bottom dead center (lowest position), the molten metal 5 in the pump cylinder 48 will be pushed out into the communication hole 49, and will be supplied to the die-cast die 1 through the hot water pipe 3. As shown in FIG. In addition, the heater 4 divided into the three regions of the tap water pipe 3, the heater 11 of the nozzle unit 6, and the like are also independently temperature controlled by the entire control unit S.

In addition, the whole control part S of the die-casting machine B is a reciprocating motion of the moving die plate 22 of the die-casting die 1, a reciprocating speed, and the temperature of the stationary die 1a or the moving die 1b. Analysis of the input data of the sensors 23 and 24, temperature control of the mold heaters 25 and 29 based on the data, injection speed and operation timing of the injection piston 27, and the extraction device as described above ( In addition to the control of the operation timing of T and the conveying apparatus H, the control regarding the whole die-casting machine B and its attached equipment is performed.

Moreover, the whole control part S mounted in the die-caster B has the display apparatus G and the input device N which has a ten key, and inputs and correct | amends the set value to the whole control part S, and various The display of the work status is performed uniformly through these.

The present invention is to provide uniform control of the die caster, such as the hot water pump, the hot water pipe disposed in the melting furnace and the furnace, and the raw metal supply device or product extractor attached to the melting furnace as needed in the overall control unit of the die caster. As a result, even an inexperienced person can easily manage the apparatus. Moreover, since the sleeve length of the mold sleeve of the apparatus is significantly shorter than in the related art, high sleeve filling rate and high speed injection are made possible, and ultra-thin products can be manufactured.

Claims (4)

a) a die caster having a die cast mold and a mold sleeve housed in a recess formed in a fixed die plate to which the fixed mold of the die cast mold is attached, wherein a water sleeve is provided in the recess; (b) One end of the die sleeve of the die-cast die, which is installed to be spaced apart from the die caster, is connected to the crucible for maintaining the melt, the hot water pump installed in the crucible, and the pump discharge port of the hot water pump, and the other end thereof. A die-casting device comprising: a melting furnace having a hot water pipe, which is connected to the hot water hole so as to be alignable, and which supplies molten metal. The die casting apparatus according to claim 1, wherein a product extractor which interlocks with the die casting machine and takes out the die cast product from the die casting mold at the time of opening and closing is attached to the die casting machine. The die casting apparatus according to claim 1 or 2, wherein a raw material metal supply device for supplying a die cast metal cold ingot to a melting furnace by the number of product shots of the die casting machine is mounted on the melting furnace. The die-casting apparatus according to any one of claims 1 to 3, wherein the control of the entire die-casting apparatus is concentrated in all the control units of the die-casting apparatus.