Die-casting anti-overflow structure for cutting saw shell casting production

Abstract

The utility model discloses a die-casting spill-proof structure for producing a cutting saw shell casting, which belongs to the technical field of die-casting dies and comprises a fixing frame, one end of the fixing frame is fixedly connected with a first die holder, and a second die holder is arranged on one side of the first die holder. By arranging the first channel and the second channel, the inlet of the overflow groove in a single shape can be divided into two buffer channels, the flow state of molten metal entering the overflow groove is changed, the throttling and buffering effects are achieved, and the cross section of the first channel and the cross section of the second channel are oval, so that the service life of the overflow groove is prolonged. The anti-overflow structure prevents molten metal from directly splashing out of the channel due to too high speed in the initial stage of injection, can also prevent the molten metal from flowing back to the cavity from the channel due to pressure fluctuation in the later stage of filling, further improves the anti-overflow effect, prolongs the exhaust path and increases the exhaust resistance by arranging the staggered partition plate, and improves the production efficiency. And the gas can be discharged only after being turned for multiple times, so that the phenomenon of material flying is avoided, and the using effect is improved.

Description

Technical Field

[0001] This utility model relates to the field of die casting mold technology, specifically to a die casting anti-overflow structure for the production of cutting saw housing castings. Background Technology

[0002] Die casting is the main method for producing complex metal housing parts (such as the housing of a cutting saw). It involves filling the mold cavity with molten metal under high pressure and high speed and then rapidly solidifying it. In order to expel the gas in the cavity, accommodate the cold metal generated by high-speed filling, and transfer shrinkage defects, an overflow system is usually set on the parting surface of the mold. This system mainly includes overflow grooves and venting grooves.

[0003] In practical use, the existing anti-overflow structure for die casting of cutting saw housings typically has a simple rectangular opening at the overflow groove inlet, with a cross-sectional area usually smaller than the ingate. Although it can vent air, it cannot prevent the molten metal that has entered the overflow groove from flowing back or splashing to a certain extent, resulting in limited anti-overflow effect. Moreover, the venting grooves are mostly shallow, straight grooves that lead directly to the outside of the mold, which can easily cause material to fly off during injection. Therefore, there is an urgent need to improve the technology of the anti-overflow structure for die casting of cutting saw housings to improve this equipment. Utility Model Content

[0004] The purpose of this utility model is to provide a die-casting anti-overflow structure for the production of cutting saw housing castings. By setting a first channel and a second channel, the single-shaped overflow groove inlet is divided into two buffer channels, which changes the flow state of the molten metal when it enters the overflow groove, thus playing a throttling and buffering role. Moreover, the cross-section of the first channel and the second channel is elliptical, which prevents the molten metal from splashing directly out of the channel due to excessive speed in the early stage of injection, and also prevents the molten metal from flowing back from the channel to the cavity due to pressure fluctuations in the later stage of filling, further improving the anti-overflow effect. At the same time, by setting a staggered baffle, the gas must go through multiple turns before it can be discharged, avoiding the phenomenon of flying material, so as to solve the problems mentioned in the background art that are currently on the market.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a die-casting anti-overflow structure for producing a cutting saw housing, comprising a fixed frame, a first mold base fixedly connected to one end of the fixed frame, a second mold base provided on one side of the first mold base, a connecting pipe fixedly connected to the end of the second mold base away from the first mold base, the top end of the connecting pipe communicating with a casting box, cavities being formed inside both the first and second mold bases, a casting channel being formed inside the connecting pipe, the casting channel extending to the cavity inside the second mold base, and a demolding mechanism provided inside the first mold base, the demolding mechanism being capable of... When the mold is opened, the mold is demolded. Both the first mold base and the second mold base have overflow inlets and venting channels at their contact surfaces. One end of the overflow inlet is connected to the cavity. The other end of the overflow inlet and the venting channel are provided with a first channel and a second channel. The cross-section of the first channel and the second channel is elliptical. The other end of the venting channel extends to the outside of the first mold base and the second mold base. Multiple partitions are provided in the venting channel. The multiple partitions in the venting channel are spaced at the same distance and are staggered. A slag collection channel is provided at the rear end of the venting channel near the partitions.

[0006] Preferably, the first mold base has an installation groove at the end away from the cavity, a backing plate is slidably connected inside the installation groove, a push rod is fixedly connected to one end of the backing plate, the push rod extends to the outside of the first mold base and forms a rotatable connection with the first mold base, the backing plate is located in the cavity inside the first mold base, a vertical plate is fixedly connected inside the fixing frame, a hydraulic rod is fixedly connected to the middle of the vertical plate, a movable plate is fixedly connected to one end of the hydraulic rod, the movable plate is slidably connected inside the fixing frame, and the other end of the movable plate is connected to the push rod.

[0007] Preferably, the mounting groove is connected to the cavity, and the end face of the abutment plate is flush with the side wall of the cavity inside the first mold base.

[0008] Preferably, the first channel and the second channel are branch channels of the overflow groove, and the cavity, the overflow groove inlet, the branch channel and the exhaust groove are interconnected.

[0009] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0010] This invention, by setting a first channel and a second channel, divides the single-shaped overflow tank inlet into two buffer channels, changing the flow pattern of molten metal entering the overflow tank and achieving a throttling and buffering effect. Furthermore, the cross-sections of the first and second channels are elliptical, preventing molten metal from splashing directly out of the channels due to excessive speed in the initial stage of injection, and preventing molten metal from flowing back into the cavity from the channels due to pressure fluctuations in the later stage of filling, further improving the overflow prevention effect. At the same time, by setting staggered baffles, the exhaust path is extended and the exhaust resistance is increased, so that the gas must undergo multiple turns before it can be discharged, avoiding the phenomenon of flying material and improving the use effect.

[0011] This invention features a partition and a slag collection trough. The partitions in the exhaust trough are staggered, creating a more tortuous structure that forces the gas to undergo multiple turns before being discharged. Tiny metal droplets or oil mixed in the gas lose kinetic energy when they impact the partitions and corners, settling into the slag collection trough. This completely prevents material from flying out of the mold, achieving both efficient exhaust and absolute overflow prevention, and making it convenient to use. Attached Figure Description

[0012] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0013] Figure 2 This is a schematic diagram of the internal cross-sectional structure of this utility model;

[0014] Figure 3 This is a side view of the first mold base of this utility model.

[0015] Figure 4 This utility model Figure 3 A magnified schematic diagram of the structure at point A in the middle.

[0016] In the diagram: 1. Fixed frame; 2. First mold base; 3. Second mold base; 4. Connecting pipe; 5. Casting box; 6. Cavity; 7. Casting channel; 8. Installation groove; 9. Push rod; 10. Support plate; 11. Vertical plate; 12. Hydraulic rod; 13. Moving plate; 14. Overflow channel inlet; 15. First channel; 16. Second channel; 17. Venting channel; 18. Partition plate; 19. Slag collection channel. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] Please see Figures 1 to 4 This utility model provides a technical solution: a die-casting anti-overflow structure for producing a cutting saw housing, including a fixed frame 1, a first mold base 2 fixedly connected to one end of the fixed frame 1, a second mold base 3 provided on one side of the first mold base 2, a connecting pipe 4 fixedly connected to the end of the second mold base 3 away from the first mold base 2, and a casting box 5 connected to the top end of the connecting pipe 4. Both the first mold base 2 and the second mold base 3 have cavities 6 inside, and a casting channel 7 is provided inside the connecting pipe 4, extending to the cavity 6 inside the second mold base 3. A demolding mechanism is provided inside the first mold base 2, which can demold the mold during mold opening. Both the first mold base 2 and the second mold base 3 have overflow inlet 14 and venting groove 17 at their contact surfaces. One end of the overflow inlet 14 is connected to the cavity 6. The other end of the overflow inlet 14 and the venting groove 17 are provided with a first channel 15 and a second channel 16. The cross-section of the first channel 15 and the second channel 16 is elliptical. The other end of the venting groove 17 extends to the outside of the first mold base 2 and the second mold base 3. Multiple partitions 18 are provided in the venting groove 17. The multiple partitions 18 in the venting groove 17 are spaced at the same distance. The partitions 18 in the venting groove 17 are staggered. A slag collection groove 19 is provided at the rear end of the venting groove 17 near the partitions 18.

[0019] By setting the first channel 15 and the second channel 16, the single-shaped overflow inlet 14 can be divided into two buffer channels, changing the flow state of the molten metal when it enters the overflow tank, thus playing a role in throttling and buffering. The cross-sections of the first channel 15 and the second channel 16 are elliptical. When the molten metal rushes towards the overflow inlet 14 at high speed, it can first hit the bend of the channel and be initially consumed before entering the venting tank 17. This prevents the molten metal from splashing directly out of the channel due to excessive speed in the early stage of injection, and also prevents the molten metal from flowing back into the cavity 6 from the channel due to pressure fluctuations in the later stage of filling, further improving the anti-overflow effect. At the same time, by setting the staggered baffle 18, the labyrinthine tortuous structure makes the gas have to go through multiple turns before it can be discharged. The tiny molten metal droplets or oil stains mixed in the gas will lose kinetic energy when they hit the baffle 18 and the corners and settle in the slag collection tank 19, thus completely avoiding the phenomenon of flying material outside the mold. This achieves a balance between efficient venting and absolute anti-overflow, extends the venting path and increases the venting resistance, and improves the performance.

[0020] Please see Figures 1 to 2The first mold base 2 has an installation groove 8 at the end away from the cavity 6. A backing plate 10 is slidably connected inside the installation groove 8. A push rod 9 is fixedly connected to one end of the backing plate 10. The push rod 9 extends to the outside of the first mold base 2 and forms a rotatable connection with the first mold base 2. The backing plate 10 is located in the cavity 6 inside the first mold base 2. A vertical plate 11 is fixedly connected inside the fixing frame 1. A hydraulic rod 12 is fixedly connected to the middle of the vertical plate 11. A movable plate 13 is fixedly connected to one end of the hydraulic rod 12. The movable plate 13 is slidably connected inside the fixing frame 1. The other end of the movable plate 13 is connected to the push rod 9.

[0021] Please see Figures 2 to 3 The mounting groove 8 is connected to the cavity 6. The end face of the abutment plate 10 is flush with the side wall of the cavity 6 inside the first mold base 2. The first channel 15 and the second channel 16 are branch channels of the overflow groove. The cavity 6, the overflow groove inlet 14, the branch channels and the exhaust groove 17 are interconnected.

[0022] Working principle: When using this die-casting anti-overflow structure for the production of cutting saw housing castings, firstly, the first mold base 2 and the second mold base 3 are closed. Molten metal enters the casting channel 7 in the connecting pipe 4 through the casting box 5, and fills the cavity 6 in the second mold base 3 through the casting channel 7. During the filling process of the molten metal, as the liquid level rises, the gas in the cavity 6 and the first cold sludge metal that enters are pushed towards the overflow tank inlet 14. By setting the first channel 15 and the second channel 16, the single-shaped overflow tank inlet 14 can be divided into two buffer channels, which changes the flow state of the molten metal when it enters the overflow tank, and plays a role in throttling and buffering.

[0023] Furthermore, the cross-sections of the first channel 15 and the second channel 16 are elliptical. When the molten metal rushes at high speed towards the overflow tank inlet 14, it first impacts the bend in the channel, where it is initially consumed before entering the exhaust tank 17. This structure effectively prevents the molten metal from rebounding and splashing after rushing directly to the bottom of the tank, slowing down the flow rate of the molten metal in the channel. At the same time, by setting the staggered baffle 18, the exhaust path is extended and the exhaust resistance is increased, requiring the gas to undergo multiple turns before being discharged. Tiny molten metal droplets or oil stains mixed in the gas are thus contained within the exhaust system. When impacting the baffle 18 and the corner, it loses kinetic energy and settles in the slag collection tank 19, avoiding the phenomenon of flying material and improving the use effect. After the casting is cooled and formed, the mold opening operation can be performed. The hydraulic rod 12 works by controlling the stroke through the hydraulic rod 12, which is the prior art, so it will not be described in detail in this application. The hydraulic rod 12 pushes the moving plate 13 to move forward in the fixed frame 1. The moving plate 13 drives the push rod 9 to push the abutment plate 10 to slide in the mounting groove 8. The abutment plate 10 smoothly ejects the casting formed in the cavity 6 for demolding.

[0024] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A die-casting anti-overflow structure for producing a cutting saw housing, comprising a fixing frame (1), characterized in that: One end of the fixed frame (1) is fixedly connected to a first mold base (2). A second mold base (3) is provided on one side of the first mold base (2). A connecting pipe (4) is fixedly connected to the end of the second mold base (3) away from the first mold base (2). The top end of the connecting pipe (4) is connected to a casting box (5). Cavities (6) are opened inside the first mold base (2) and the second mold base (3). A casting channel (7) is opened inside the connecting pipe (4). The casting channel (7) extends to the cavity (6) inside the second mold base (3). A demolding mechanism is provided inside the first mold base (2). The demolding mechanism can demold the mold when the mold is opened. An overflow is provided at the contact surface between the first mold base (2) and the second mold base (3). The overflow inlet (14) and the venting groove (17) are provided. One end of the overflow inlet (14) is connected to the cavity (6). The other end of the overflow inlet (14) and the venting groove (17) are provided with a first channel (15) and a second channel (16). The cross-section of the first channel (15) and the second channel (16) is elliptical. The other end of the venting groove (17) extends to the outside of the first mold base (2) and the second mold base (3). The venting groove (17) is provided with multiple partitions (18). The multiple partitions (18) in the venting groove (17) are spaced at the same distance. The partitions (18) in the venting groove (17) are staggered. The venting groove (17) is provided with a slag collection groove (19) near the rear end of the partition (18).

2. The die-casting anti-overflow structure for producing a cutting saw housing according to claim 1, characterized in that: The demolding mechanism includes an installation groove (8), a push rod (9), a stop plate (10), a vertical plate (11), a hydraulic rod (12), and a moving plate (13). The first mold base (2) has an installation groove (8) at one end away from the cavity (6). The stop plate (10) is slidably connected inside the installation groove (8). The push rod (9) is fixedly connected to one end of the stop plate (10). The push rod (9) extends to the outside of the first mold base (2) and forms a rotatable connection with the first mold base (2). The stop plate (10) is located in the cavity (6) inside the first mold base (2). The vertical plate (11) is fixedly connected inside the fixed frame (1). The hydraulic rod (12) is fixedly connected to the middle of the vertical plate (11). The moving plate (13) is fixedly connected to one end of the hydraulic rod (12). The moving plate (13) is slidably connected inside the fixed frame (1). The other end of the moving plate (13) is connected to the push rod (9).

3. The die-casting anti-overflow structure for producing a cutting saw housing according to claim 2, characterized in that: The mounting groove (8) is connected to the cavity (6), and the end face of the abutment plate (10) is flush with the side wall of the cavity (6) inside the first mold base (2).

4. The die-casting anti-overflow structure for producing a cutting saw housing according to claim 1, characterized in that: The first channel (15) and the second channel (16) are branch channels of the overflow channel, and the cavity (6), the overflow channel inlet (14), the branch channel and the exhaust channel (17) are interconnected.

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