CN114406198A - Cast aluminum die - Google Patents

Abstract

The invention relates to the field of cast aluminum molds, in particular to a cast aluminum mold; the pouring device comprises a base, a lower die, an upper die and a pouring opening, wherein the lower die is arranged on the upper part of the base, and the upper die is detachably and fixedly connected to the upper surface of the lower die; a through hole is formed in the upper surface of the upper die, and a pouring opening is fixedly connected to the through hole in the upper surface of the upper die; the upper wall of the upper die is provided with an air storage tank, and a notch of the air storage tank is fixedly connected with a metal block; the right part and the upper part of the gas storage tank are respectively provided with a first rectangular groove and a second rectangular groove, the first rectangular groove and the second rectangular groove are internally connected with a first sliding block and a second sliding block in a sliding and sealing manner, the right end of the first rectangular groove is provided with a vertical groove, and the vertical groove is internally connected with a stop block in a sliding and sealing manner; according to the invention, the air storage groove, the metal block, the first sliding block and the second sliding block are arranged, so that the air hole gap phenomenon of the formed aluminum piece is reduced on the basis of reducing the waste of aluminum liquid at the pouring opening.

Description

A cast aluminum mold

technical field

The invention relates to the field of cast aluminum molds, in particular to a cast aluminum mold.

Background technique

Cast aluminum is a kind of pure aluminum or aluminum alloy ingot prepared according to the standard composition ratio, after artificial heating to turn it into aluminum alloy liquid or molten state, and then through professional mold or corresponding process to make aluminum liquid or molten state. A process method in which aluminum alloy is poured into the cavity and cooled to form aluminum parts of the desired shape. Pour it into the aluminum ingot mold, and then demold it after cooling and forming.

In the prior art, when casting a cylindrical aluminum part, in order to make the aluminum part complete without gaps, the pouring mouth will be filled during pouring, or even overflow from the pouring mouth, resulting in waste of aluminum liquid. Insufficient may cause the cast aluminum part to be incomplete and contain notches.

In view of this, in order to overcome the above-mentioned technical problems, the present invention designs an aluminum casting mold to solve the above-mentioned technical problems.

SUMMARY OF THE INVENTION

The technical problem to be solved by the present invention is: when casting aluminum, when pouring molten aluminum liquid into a mold for casting and forming a cylindrical aluminum part, in order to make the aluminum part complete without gaps, the pouring port will be filled during pouring. , and even overflow from the pouring port, causing waste of aluminum liquid. If the pouring is insufficient, the cast aluminum parts may be incomplete and contain gaps.

To achieve the above object, the present invention provides the following technical solutions:

The invention provides an aluminum casting mold, comprising a base, a lower mold, an upper mold and a pouring port, the lower mold is arranged on the upper part of the base, and the upper mold is detachably and fixedly connected to the upper surface of the lower mold; A through hole is opened, and a pouring port is fixedly connected to the through hole on the upper surface of the upper mold;

The upper wall of the upper mold is provided with a gas storage tank, the gas storage tank is used for placing inert gas, and the slot of the gas storage tank is fixedly connected with a metal block; the metal block has good thermal conductivity;

The right part and the upper part of the gas storage tank are respectively provided with a No. 1 rectangular groove and a No. 2 rectangular groove, the right part of the No. 1 rectangular groove is communicated with the through hole, and a No. 1 rectangular groove is opened between the right part and the gas storage tank. No. 2 channel, a No. 2 channel is opened between the No. 2 rectangular groove and the gas storage tank;

The No. 1 rectangular groove and the No. 2 rectangular groove are slidably and sealedly connected to the No. 1 slider and the No. 2 slider, the left side of the No. 2 slider is fixedly connected with a No. 1 block 352, and the left side of the No. 2 rectangular groove is opened. There is a No. 1 chute matched with the No. 1 block 352, the bottom ends of the No. 1 slider and No. 2 slider are fixedly connected with one end of a spring, the left wall of the No. The bottom wall is respectively fixedly connected with the other end of the spring;

The right end of the No. 1 rectangular groove is provided with a vertical groove, a block is slidably and sealedly connected inside the vertical groove, the bottom end of the block is fixedly connected with one end of the spring, and the bottom wall of the vertical groove is fixedly connected with a spring. the other end of the spring.

Preferably, a groove is formed on the upper surface of the base, a rotating unit is provided between the base and the lower die, and the rotating unit includes a motor, a bearing, a transmission shaft and a ball disc; the motor is arranged inside the groove, The output shaft of the motor is fixedly connected to the transmission shaft, the bearing is arranged on the outer surface of the transmission shaft, the ball disc is fixedly connected to the upper surface of the base, a through hole is opened in the middle of the ball disc, and the top of the transmission shaft is It is fixedly connected to the bottom wall of the lower die through the No. 1 through hole.

Preferably, the right part and the upper part of the gas storage tank are respectively provided with a No. 3 rectangular groove and a No. 2 rectangular groove, the left part of the No. 3 rectangular groove communicates with the through hole, and the right part of the No. 3 rectangular groove and the gas storage tank are There is a No. 3 channel between them, a No. 3 slider is slidably and sealedly connected inside the No. 3 rectangular groove, a No. 2 block 323 is fixedly connected to the upper part of the No. 3 slider, and a No. 2 card is opened at the top of the No. 3 rectangular groove. The No. 2 chute matched with the block 323, the bottom end of the No. 3 slide block is fixedly connected to one end of the spring, and the left wall of the No. 3 rectangular groove is fixedly connected to the other end of the spring.

Preferably, the upper mold includes an upper mold seat and an upper mold core, and the upper mold seat and the upper mold core are detachably and fixedly connected; the lower mold includes a lower mold seat and a lower mold core, and the lower mold seat and the lower mold core are The mold core is detachable and fixed connection.

Preferably, the contact parts of the upper mold core and the lower mold core are arranged to be in tooth-shaped fitting contact.

Preferably, the surfaces of the upper mold core, the lower mold core, the No. 1 slider and the No. 3 slider are coated with a release agent.

The beneficial effects of the present invention are as follows:

1. The present invention reduces the occurrence of air hole gaps in the formed aluminum parts on the basis of reducing the waste of aluminum liquid at the pouring port by setting the gas storage tank, the metal block, the No. 1 slider and the No. 2 slider.

2. A casting aluminum mold of the present invention can facilitate cleaning of some scraps formed at the contact surface of the upper mold and the lower mold by setting a rotating unit, and make the molten aluminum fill the entire mold, further reducing the amount of aluminum parts after molding. There is a risk of blowhole defects, as well as aids in demolding.

Description of drawings

In order to illustrate the specific embodiments of the present invention or the technical solutions in the prior art more clearly, the following briefly introduces the accompanying drawings that need to be used in the description of the specific embodiments or the prior art. Obviously, the accompanying drawings in the following description The drawings are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings without creative efforts.

Fig. 1 is the overall structure schematic diagram of the present invention;

Figure 2 is an enlarged view of the inside of the upper wall of the upper die of the present invention.

In the figure: base 1, lower mold 2, lower mold base 21, lower mold core 22, upper mold 3, through hole 31, gas storage groove 32, No. 3 rectangular groove 321, No. 3 slider 322, No. 2 clamping block 323 , Metal block 33, No. 1 rectangular slot 34, No. 1 slider 341, No. 2 rectangular slot 35, No. 2 slider 351, No. 1 block 352, Vertical slot 36, Block 37, Upper die seat 38, upper The mold core 39 , the pouring port 4 , the rotating unit 5 , the motor 51 , the bearing 52 , the transmission shaft 53 , and the ball disc 54 .

Detailed ways

In order to make it easy to understand the technical means, creation features, achieved goals and effects of the present invention, the present invention will be further described below with reference to the specific embodiments.

The present invention provides an aluminum casting mold, comprising a base 1, a lower mold 2, an upper mold 3 and a pouring port 4, the lower mold 2 is arranged on the upper part of the base 1, and the upper mold 3 is detachably and fixedly connected to the upper surface of the lower mold 2; The upper surface of the mold 3 is provided with a through hole 31, and the pouring port 4 is fixedly connected to the through hole 31;

The upper wall of the upper mold 3 is provided with a gas storage tank 32, the gas storage tank 32 is used for placing inert gas, and the notch of the gas storage tank 32 is fixedly connected with a metal block 33; the metal block 33 has good thermal conductivity; the gas storage tank 32 One side of the air conditioner is provided with a pipeline that communicates with the outside world, and the pipeline is communicated with an external gas source to supplement the gas in the gas storage tank 32 at any time;

The right part and the upper part of the gas storage tank 32 are respectively provided with a No. 1 rectangular groove 34 and a No. 2 rectangular groove 35, the right part of the No. 1 rectangular groove 34 communicates with the through hole 31, and the right part of the No. There is a No. 1 channel in between, and a No. 2 channel is opened between the No. 2 rectangular groove 35 and the gas storage tank 32;

The No. 1 rectangular groove 34 and the No. 2 rectangular groove 35 are slidingly and sealedly connected to the No. 1 sliding block 341 and the No. 2 sliding block 351. The left side of the No. 2 sliding block 351 is fixedly connected to the No. 1 clamping block 352, and the left side of the No. 2 rectangular groove 35 is opened. There is a No. 1 chute matched with the No. 1 block 352, the bottom ends of the No. 1 slider 341 and the No. 2 slider 351 are fixedly connected with one end of the spring, the left wall of the No. 1 rectangular slot 34 and the bottom of the No. 2 rectangular slot 35 The bottom wall is respectively fixedly connected with the other end of the spring;

The right end of the No. 1 rectangular slot 34 is provided with a vertical slot 36, a block 37 is slidably and sealedly connected inside the vertical slot 36, the bottom end of the stop 37 is fixedly connected with one end of the spring, and the bottom wall of the vertical slot 36 is fixedly connected with a spring another side.

When using the present invention for casting and molding of aluminum parts, the molten aluminum liquid is injected into the mold from the pouring port 4. As the aluminum liquid gradually fills the entire mold, when the aluminum liquid gradually rises, the distance to the upper mold 3 is getting closer and closer. The metal block 33 on the upper wall of the mold 3 has good thermal conductivity. The metal block 33 is gradually heated to increase the temperature in the gas storage tank 32, and the inert gas in the gas storage tank 32 is heated and expanded to increase the air pressure in the gas storage tank 32. , the expanded inert gas pushes the No. 2 slider 351 in the No. 2 rectangular groove 35 through the No. 2 channel, so that the No. 2 slider 351 slowly protrudes, the operator can reduce the pouring speed when seeing this, and it is not easy to prevent the pouring speed from being too fast. The control causes the molten aluminum to overflow, which leads to the waste of molten aluminum, and it is convenient to control the speed by reducing the speed; due to the cooperation limit of the No. 1 block 352 and the No. 1 chute, the No. 2 slider 351 will not be completely flushed out by the gas, causing the gas storage tank 32 The gas inside leaks out, and the pouring can be stopped when the molten aluminum enters the through hole 31, so that the excess molten aluminum will not accumulate in the pouring port 4 and will not overflow the molten aluminum, reducing the waste of the molten aluminum, and the workpiece is solidified and formed Afterwards, too much waste will not be formed at the pouring port 4, which will reduce the difficulty of subsequent processing by workers;

However, since the molten aluminum is not poured enough to fill the pouring port 4, the aluminum parts may have defects such as incomplete molding and gaps. Due to the existence of the block 37, when the second slider 351 is moved by the gas The slider 341 has not been pushed. At this time, the air pressure in the air storage tank 32 can be further increased by the second slider 351, and then the increased air pressure makes the first slider 341 break away from the restriction of the stopper 37 and communicate with each other. The aluminum liquid in the hole 31 is extruded, so that the parts in the mold that are not filled with the aluminum liquid are extruded and filled, thereby reducing the appearance of air hole gaps in the formed aluminum parts.

As a specific embodiment of the present invention, a groove is formed in the base 1, a rotating unit 5 is arranged between the base 1 and the lower die 2, and the rotating unit 5 includes a motor 51, a bearing 52, a transmission shaft 53 and a ball disc 54; The motor 51 is arranged inside the groove, the output shaft of the motor 51 is fixedly connected with the transmission shaft 53, the bearing 52 is arranged on the outer surface of the transmission shaft 53, the ball disc 54 is fixedly connected with the upper surface of the base 1, and there is a no. The top end of the transmission shaft 53 passes through the No. 1 through hole and is fixedly connected to the bottom wall of the lower die 2 .

The rotating unit 5 includes a motor 51, a bearing 52, a transmission shaft 53 and a ball disc 54. When the rotating unit 5 is in operation, the motor 51 is started, and the output shaft of the motor 51 drives the transmission shaft 53 to rotate, and the transmission shaft 53 drives the lower part which is fixedly connected to it. The mold 2 rotates; by fixing the ball disc 54 on the upper surface of the base 1, the friction force received during the rotation of the lower mold 2 is reduced, and the energy loss is reduced;

After the molten aluminum fills the entire mold, the present invention is only suitable for pouring cylindrical aluminum parts, and the motor 51 is started to make the upper mold 3 and the lower mold 2 rotate slightly, so that the aluminum liquid can fill the entire mold during the rotation process, which further reduces the molding cost. Aluminum parts have the risk of porosity defects. After the aluminum liquid solidifies the workpiece, some scraps will be formed where the upper die 3 and the lower die 2 are in contact. The connection between the leftover material and the aluminum part will be partially disconnected, which reduces the difficulty of cleaning the leftover material by workers.

As a specific embodiment of the present invention, a No. 3 rectangular groove 321 is opened below the No. 1 rectangular groove 34 on the right part of the gas storage tank 32 , the right part of the No. 3 rectangular groove 321 communicates with the through hole 31 , and the No. 3 rectangular groove 321 The No. 3 channel is opened between the left part and the gas storage tank 32 , the No. 3 sliding block 322 is slidably and sealedly connected inside the No. 3 rectangular groove 321 , the No. 2 clamping block 323 is fixedly connected to the upper part of the No. 3 sliding block 322 , and the top of the No. 3 rectangular groove 321 There is a No. 2 chute matched with the No. 2 clamping block 323 , one end of the spring is fixedly connected to the bottom end of the No. 3 slider 322 , and the other end of the spring is fixedly connected to the left wall of the No. 3 rectangular groove 321 .

As the aluminum liquid gradually increases in the mold, the temperature in the gas storage tank 32 also gradually increases, and the inert gas in the gas storage tank 32 is heated and expanded, so that the air pressure in the gas storage tank 32 increases, and the expanded inert gas passes through the third channel. Push the No. 3 slider 322 in the No. 3 rectangular slot 321; the No. 3 slider 322 extends into the through hole 31, due to the limit cooperation between the No. 2 block 323 and the No. 2 chute, the No. 3 slider 322 It cannot be fully extended, and only the part can be extended to block the through hole 31. On the one hand, it can reduce the speed of molten aluminum injection and prevent the pouring speed from being drawn into the air and causing bubbles in the molten aluminum, making the formed aluminum parts. It contains air hole defects. On the other hand, when the aluminum part is formed, the through hole 31 will form waste and need to be removed. Because there will be a gap between the waste and the formed part of the No. 3 slider 322, it is convenient for workers to use a saw to align the through hole 31. Part of the waste is removed.

As a specific embodiment of the present invention, the upper mold 3 includes an upper mold base 38 and an upper mold core 39, and the upper mold base 38 and the upper mold core 39 are detachably and fixedly connected; the lower mold 2 includes a lower mold base 21 and a lower mold core 22. The lower mold base 21 and the lower mold core 22 are detachably and fixedly connected;

The upper mold base 38 and the upper mold core 39 are detachably and fixedly connected, and the lower mold base 21 and the lower mold core 22 are detachably and fixedly connected; so that the upper mold core 39 and the lower mold core 22 of the mold can be replaced, which can be carried out according to different shape requirements. Replacing the mold core enables the present invention to have a wider application range.

As a specific embodiment of the present invention, the contact portion of the upper mold core 39 and the lower mold core 22 is configured to be in tooth-shaped fitting contact.

The contact part of the upper mold core 39 and the lower mold core 22 is set to be in tooth-shaped fitting contact. The parts where the scraps and aluminum parts are in contact with the aluminum parts are thinner and easier to clean, and the aluminum parts will tend to move when the aluminum parts are subjected to circumferential force during the rotation process. Difficulty in cleaning off scraps.

As a specific embodiment of the present invention, the surfaces of the upper mold core 39 , the lower mold core 22 , the No. 1 slider 341 and the No. 3 slider 322 are coated with a release agent.

The surfaces of the upper mold core 39 and the lower mold core 22 are coated with a release agent, which makes it easier to release the aluminum parts after molding, and the No.

working principle:

When using the present invention for casting and molding of aluminum parts, the molten aluminum liquid is injected into the mold from the pouring port 4. As the aluminum liquid gradually fills the entire mold, when the aluminum liquid gradually rises, the distance to the upper mold 3 is getting closer and closer. The metal block 33 on the upper wall of the mold 3 has good thermal conductivity. The metal block 33 is gradually heated to increase the temperature in the gas storage tank 32, and the inert gas in the gas storage tank 32 is heated and expanded to increase the air pressure in the gas storage tank 32. , the expanded inert gas pushes the No. 2 slider 351 in the No. 2 rectangular groove 35 through the No. 2 channel, so that the No. 2 slider 351 slowly protrudes, the operator can reduce the pouring speed when seeing this, and it is not easy to prevent the pouring speed from being too fast. The control causes the molten aluminum to overflow, which leads to the waste of molten aluminum, and it is convenient to control the speed by reducing the speed; due to the cooperation limit of the No. 1 block 352 and the No. 1 chute, the No. 2 slider 351 will not be completely flushed out by the gas, causing the gas storage tank 32 The gas inside leaks out, and the pouring can be stopped when the molten aluminum enters the through hole 31, so that the excess molten aluminum will not accumulate in the pouring port 4 and will not overflow the molten aluminum, reducing the waste of the molten aluminum, and the workpiece is solidified and formed Afterwards, too much waste will not be formed at the pouring port 4, which will reduce the difficulty of subsequent processing by workers;

However, since the molten aluminum is not poured enough to fill the pouring port 4, the aluminum parts may have defects such as incomplete molding and gaps. Due to the existence of the block 37, when the second slider 351 is moved by the gas The slider 341 has not been pushed. At this time, the air pressure in the air storage tank 32 can be further increased by the second slider 351, and then the increased air pressure makes the first slider 341 break away from the restriction of the stopper 37 and communicate with each other. The aluminum liquid in the hole 31 is extruded, so that the parts in the mold that are not filled with the aluminum liquid are extruded and filled, thereby reducing the appearance of air hole gaps in the formed aluminum parts.

After the molten aluminum fills the entire mold, the present invention is only suitable for pouring cylindrical aluminum parts, and the motor 51 is started to make the upper mold 3 and the lower mold 2 rotate slightly, so that the aluminum liquid can fill the entire mold during the rotation process, which further reduces the molding cost. Aluminum parts have the risk of porosity defects. After the aluminum liquid solidifies the workpiece, some scraps will be formed where the upper die 3 and the lower die 2 are in contact. The connection between the leftover material and the aluminum part will be partially disconnected, which reduces the difficulty of cleaning the leftover material by workers.

As the aluminum liquid gradually increases in the mold, the temperature in the gas storage tank 32 also gradually increases, and the inert gas in the gas storage tank 32 is heated and expanded, so that the air pressure in the gas storage tank 32 increases, and the expanded inert gas passes through the third channel. Push the No. 3 slider 322 in the No. 3 rectangular slot 321; the No. 3 slider 322 extends into the through hole 31, due to the limit cooperation between the No. 2 block 323 and the No. 2 chute, the No. 3 slider 322 It cannot be fully extended, and only the part can be extended to block the through hole 31. On the one hand, it can reduce the speed of molten aluminum injection and prevent the pouring speed from being drawn into the air and causing bubbles in the molten aluminum, making the formed aluminum parts. It contains air hole defects. On the other hand, when the aluminum part is formed, the through hole 31 will form waste and need to be removed. Because there will be a gap between the waste and the formed part of the No. 3 slider 322, it is convenient for workers to use a saw to align the through hole 31. Part of the waste is removed.

The upper mold base 38 and the upper mold core 39 are detachably and fixedly connected, and the lower mold base 21 and the lower mold core 22 are detachably and fixedly connected; so that the upper mold core 39 and the lower mold core 22 of the mold can be replaced, which can be carried out according to different shape requirements. Replacing the mold core enables the present invention to have a wider application range.

The contact part of the upper mold core 39 and the lower mold core 22 is set to be in tooth-shaped fitting contact. The parts where the scraps and aluminum parts are in contact with the aluminum parts are thinner and easier to clean, and the aluminum parts will tend to move when the aluminum parts are subjected to circumferential force during the rotation process. Difficulty in cleaning off scraps.

The surfaces of the upper mold core 39 and the lower mold core 22 are coated with a release agent, which makes it easier to release the aluminum parts after molding, and the No.

The foregoing has shown and described the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above-mentioned embodiments, and the descriptions in the above-mentioned embodiments and the description are only to illustrate the principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have Various changes and modifications fall within the scope of the claimed invention. The claimed scope of the present invention is defined by the appended claims and their equivalents.

Claims (6)

1. The utility model provides a cast aluminum mould, includes base (1), lower mould (2), goes up mould (3) and pours a mouthful (4), its characterized in that: the lower die (2) is arranged on the upper part of the base (1), and the upper surface of the lower die (2) is detachably and fixedly connected with an upper die (3); a through hole (31) is formed in the upper surface of the upper die (3), and a pouring opening (4) is fixedly connected to the through hole (31);

the upper wall of the upper die (3) is provided with an air storage groove (32), inert gas is placed in the air storage groove (32), and a notch of the air storage groove (32) is fixedly connected with a metal block (33); the metal block (33) has good heat-conducting property;

a first rectangular groove (34) and a second rectangular groove (35) are respectively formed in the right part and the upper part of the gas storage groove (32), the right part of the first rectangular groove (34) is communicated with the through hole (31), a first channel is formed between the right part of the first rectangular groove (34) and the gas storage groove (32), and a second channel is formed between the second rectangular groove (35) and the gas storage groove (32);

a first sliding block (341) and a second sliding block (351) are connected inside the first rectangular groove (34) and the second rectangular groove (35) in a sliding and sealing mode, a first clamping block (351) is fixedly connected to the left side of the second sliding block (351), a first sliding groove matched with the first clamping block (351) is formed in the left side of the second rectangular groove (35), one end of a spring is fixedly connected to the bottom ends of the first sliding block (341) and the second sliding block (351), and the other end of the spring is fixedly connected to the left wall of the first rectangular groove (34) and the bottom wall of the second rectangular groove (35) respectively;

a vertical groove (36) is formed in the right end of the first rectangular groove (34), a stop block (37) is connected to the inside of the vertical groove (36) in a sliding and sealing mode, one end of a spring is fixedly connected to the bottom end of the stop block (37), and the other end of the spring is fixedly connected to the bottom wall of the vertical groove (36).

2. The cast aluminum mold of claim 1, wherein: the upper surface of the base (1) is provided with a groove, a rotating unit (5) is arranged between the base (1) and the lower die (2), and the rotating unit (5) comprises a motor (51), a bearing (52), a transmission shaft (53) and a ball disc (54); the motor (51) is arranged in the groove, an output shaft of the motor (51) is fixedly connected with the transmission shaft (53), the bearing (52) is arranged on the outer surface of the transmission shaft (53), the ball disc (54) is fixedly connected with the upper surface of the base (1), a through hole (31) is formed in the middle of the ball disc (54), and the top end of the transmission shaft (53) penetrates through the through hole (31) and is fixedly connected with the bottom wall of the lower die (2).

3. The cast aluminum mold of claim 1, wherein: rectangular channel No. three (321) have been seted up to the below of rectangular channel No. one (34) in the right part of gas receiver (32), the left part and through-hole (31) of rectangular channel No. three (321) communicate with each other, have seted up No. three passageways between rectangular channel No. three (321) right part and the gas receiver (32), the inside sliding seal of rectangular channel No. three (321) is connected with No. three slider (322), No. two fixture blocks (323) of slider No. three (322) upper portion fixedly connected with, No. two spouts with No. two fixture block (323) complex are seted up on rectangular channel No. three (321) top, the one end of slider No. three (322) bottom fixedly connected with spring, the other end of the left wall fixedly connected with spring of rectangular channel No. three (321).

4. The cast aluminum mold of claim 1, wherein: the upper die (3) comprises an upper die base (38) and an upper die core (39), and the upper die base (38) is detachably and fixedly connected with the upper die core (39); the lower die (2) comprises a lower die base (21) and a lower die core (22), and the lower die base (21) and the lower die core (22) are detachably and fixedly connected.

5. A cast aluminium mould according to claim 3, wherein: the contact parts of the upper mold core (39) and the lower mold core (22) are arranged in tooth-type matching contact.

6. A cast aluminium mould according to claim 3, wherein: and release agents are coated on the surfaces of the upper mold core (39), the lower mold core (22), the first sliding block (341) and the third sliding block (322).

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