CN2302072Y - Light alloy low casting pressure forming device - Google Patents

Abstract

The utility model relates to a casting device solves the quality problem. The casting machine is provided with a first machine table plate, a second machine table plate and guide rods which are parallel to each other and slide through the second machine table plate, the guide rods and the corresponding end surfaces of the second machine table plate extend for a distance in a mutually perpendicular mode, a fixing plate is arranged at the end portion of each guide rod, a hole is formed in the center of each fixing plate, the mold is fixedly arranged between the fixing plate and the first machine table, the first side fixing plate and the second side fixing plate are arranged on two sides of each mold, and a lining and pressing device is arranged through the guide rods, the fixing plates and the holes of the fixing plates and used for casting light alloy parts.

Description

Light alloy low casting pressure forming device

The utility model relates to a pressure casting forming device, in particular to a light metal alloy pressure casting forming device.

The existing light alloy low casting pressure molding device is shown in Figures 6-9: the upper mold 2 and the lower mold 3 are respectively fixed on the upper mold fixing plate and the lower machine platen of the casting machine 1, and the two side molds 4 and 5 are respectively Correspondingly fixed on the sliding form fixing plates on both sides of the casting machine 1, the upper mold 2, the lower mold 3 and the side molds 4, 5 are tightly sealed into a mold cavity body by using oil pressure; a mold cavity 6 is provided on the sealed end surface A number of risers 6a are provided at the sides and central positions of the mold cavity 6, and the alloy melt contained in the risers 6a is used to supplement the volume shrinkage generated when the alloy in the mold cavity 6 is solidified, and the two side molds 4 and 5 are closely bonded to each other A protruding portion 4c is provided on the side of the side to form a sprue 4a, so that the sprue 4a extends upwards from the top surfaces of the two side molds 4, 5 to form a casting port 4b to fill the mold cavity 6. However, due to the lack of support on both sides of the protruding part 4c, when thermal deformation occurs, the alloy melt often leaks out of the mold from the deformed part, and because the riser and runner are arranged on the side of the mold cavity, when the melt flows from the upper When entering the mold downward, the acceleration of gravity will be generated, which will cause the mold cavity and riser edges to be eroded, which will damage the mold and often cause air entrainment. As a result, the casting quality is difficult to guarantee.

The purpose of the utility model is to provide a light alloy low casting pressure molding device which ensures the quality of castings.

The purpose of this utility model is achieved like this: light alloy low casting pressure molding device, it comprises: casting machine, pressure replenishing device, mold and mold cavity; Casting machine has first machine platen, second machine platen parallel to each other And the guide rods that slide through the second machine plate and are parallel to each other; the guide rods and the corresponding end faces of the second machine plate extend a distance perpendicularly to each other and a fixed plate is arranged at the end. There is a hole in the center of the fixed plate, and the mold It is fixed between the fixed plate and the first machine, and its two sides are the first and second side fixed plates. It is characterized in that: a pressure supplement device is provided through the guide rod, the fixed plate and its holes; the pressure supplement device includes There are oil pressure cylinder, pressure supplement rod, plate body and pressure supplement plate;

In the above design, driven by the hydraulic cylinder of the casting machine, the fixed plate moves closer to or farther away from the first machine table and the first and second side fixed plates to open and close the mold; the pressure replenishing device passes through the hole in the center of the fixed plate , to supplement the pressure on the mold cavity to achieve the effect of making the solidified structure of the casting dense and the quality of the casting guaranteed.

Below by accompanying drawing and embodiment the utility model is described further again.

Fig. 1 overall front view schematic diagram of the utility model;

Fig. 2 is a schematic diagram of mold cavity configuration of the utility model;

Fig. 3 is the schematic diagram of the casting port of the utility model;

Fig. 4 is the schematic diagram of the pressure supplementing device of the present utility model;

Fig. 5 is the enlarged schematic view of A in Fig. 4;

6-9 are schematic diagrams of existing light alloy low casting pressure forming devices.

As shown in Figures 1, 2, 4, and 5: the utility model includes a casting machine 10, a pressure replenishing device 20, a mold 30 and a mold cavity 40; the casting machine has a first machine plate 11 and a second machine plate parallel to each other. 12 and guide rods 13 that slide through the second machine plate 12 and are parallel to each other; the corresponding end faces of the guide rod and the second machine plate 12 extend a distance perpendicularly to each other and a fixed plate 14 is established at its end, and the fixed plate There is a hole 141 in the center of 14, and the mold 30 is fixed between the fixed plate 14 and the first machine plate 11, and its two sides are the first and second side fixed plates 15, 16, which are characterized in that: through the guide rod 13, fixed The plate 14 and its hole 141 are provided with a pressure replenishing device 20; the pressure replenishing device 20 includes an oil pressure cylinder 21, a pressure replenishing rod 22, a plate body 23 and a pressure replenishing plate 24; the pressure replenishing rod 22 is located on the pressure replenishing plate 24, and the plate body 23 is located at guide rod 113, is hydraulic cylinder 21 therebetween. Driven by the hydraulic cylinder 21 of the casting machine 10, the fixed plate 14 and the first machine table 11 and the first and second side fixed plates 15, 16 move closer or farther away, so that the mold 30 is opened and closed; the pressure supplement device 20 Through the hole 141 in the center of the fixing plate 14, the mold cavity 40 is supplemented with pressure, wherein the pressure supplementing plate 24 is fixed on the actuating end of the hydraulic cylinder 21 in a manner parallel to the upper end of the mold 30 and cooperates with the working end of the hydraulic cylinder 21. The movable end is linked, wherein, the pressure supplement rod 22 is set corresponding to the hole 35 of the mold 30 , and one end thereof is slidably inserted into the hole 35 and aligned with the mold cavity 40 . It is used to add pressure to the thicker part of the casting or the part where the strength of the casting needs to be improved. The hydraulic cylinder 21 can be provided with a maximum pressure of 140 kg/cm, depending on the needs, to make the alloy melt 50 fill the mold cavity 40 until the casting is solidified and formed. The pressure replenishment time and pressure depend on the temperature change of the alloy and the shape of the casting.

As shown in Fig. 3: wherein, mold 30 comprises two dies 31,32 and two side dies 33,34 and one corresponding mold cavity that is respectively arranged on the two dies 31,32 and two side dies 33,34 close-fitting end faces 40; and one is connected with this mold cavity 40 with one end, and the runner 41 that the other end extends upwards out of this two side molds 33,34 top surfaces; The runner 41 that has the pouring port 42 higher than the mold cavity 40 is L-shaped , one end of which is horizontally connected to the bottom horizontal end 411 of the mold cavity 40, and the other end extends upwards to the top vertical end 412 of the two side molds 33, 34; and a buffer groove 43 is provided. The buffer tank 43 buffers the downward impact force of the alloy melt, and gradually fills the melt upward from the bottom of the mold cavity 40 to avoid erosion and air entrainment. Wherein, the two side molds 33, 34 are arranged on the outer surface of the sprue 41, and the first and second side fixing plates 15, 16 are respectively inclined inwardly from the close end faces of the two side molds 33, 34 to form an inclined surface 331. , 341. In a word, the utility model makes the casting dense and high; can reduce the molding time and improve the efficiency; can reduce the volume of the riser and save the cost; especially reduce and avoid phenomena such as erosion, air entrainment and solution leakage.

Claims (5)

1. Light alloy low casting pressure molding device, which includes: casting machine, pressure replenishing device, mold and mold cavity; the casting machine has a first machine plate, a second machine plate, and a second machine plate that slide through the second machine parallel to each other and guide rods parallel to each other; the guide rod and the corresponding end surface of the second machine plate extend a distance perpendicularly to each other and a fixing plate is arranged at the end. There is a hole in the center of the fixing plate, and the mold is fixed on the fixing plate and the first Between the machines, the two sides are the first and second side fixing plates, which are characterized in that a pressure supplementing device is provided through the guide rod, the fixing plate and its holes; the pressure supplementing device includes a hydraulic cylinder, a pressure supplementing rod , Plate body and pressure replenishing plate; the pressure replenishing rod is arranged on the pressure replenishing plate, the plate body is arranged on the guide rod, and the oil pressure cylinder is in between. 2. The light alloy low casting pressure forming device as claimed in claim 1, wherein, the pressure replenishing plate and the upper end of the mold are fixed on the actuating end of the hydraulic cylinder in parallel with the working end of the hydraulic cylinder. The moving end is linked. 3. The light alloy low casting pressure forming device according to claim 1, wherein the pressure supplement rod is set correspondingly to the hole of the mold, and one end of it is slidably inserted into the hole, and aligned mold cavity. 4. The light alloy low casting pressure forming device as claimed in claim 1, wherein the mold includes a two-piece mold and two side molds, and a pair of molds respectively arranged on the two-piece mold and the two side molds on the mutual close-fitting end surfaces. mold cavity; and one end is connected with the mold cavity, and the other end extends upwards from the sprue on the top surface of the two side molds; the sprue with a gate higher than the mold cavity is L-shaped, and one end is horizontally connected to the mold cavity The horizontal end of the bottom of the mold cavity is connected, and the other end extends upward to the vertical end of the top surface of the two side molds, and a buffer groove is provided. 5. The light alloy low casting pressure forming device as claimed in claim 1, wherein the two side molds are arranged on the outer side of the runner, and are tightly connected to the two side molds by the first and second side fixing plates respectively. The end face is correspondingly inclined inwardly and forms an inclined surface.

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