A low-pressure casting machine with adjustable gate

Abstract

This invention relates to the field of low-pressure casting machine technology, specifically disclosing a low-pressure casting machine with an adjustable gate, including a holding furnace. A feeding port is provided through the side surface of the holding furnace, and a one-way valve is installed at the feeding port. A holding chamber is provided on the upper surface of the holding furnace, and the holding chamber is connected to the feeding port. The entire machine can be operated solely through an external hydraulic system, significantly reducing production costs and simplifying the operation of the casting machine. When the top plate moves upward, it pulls the extrusion plate upward until the extrusion plate contacts and is blocked by the limit ring. The drive rod then disengages from the extrusion plate and returns to its normal position. The upward movement of the extrusion plate creates a negative pressure at the bottom of the holding chamber, allowing molten metal to be drawn in through the feeding port for replenishment. This achieves automated replenishment of molten metal during production, significantly improving the continuity of the casting machine's operation, avoiding the drawback of manually adding molten metal, and further reducing production costs.

Description

Technical Field

[0001] This invention relates to the field of low-pressure casting machine technology, specifically a low-pressure casting machine with an adjustable gate. Background Technology

[0002] In the foundry industry, low-pressure casting machines are key equipment that fill mold cavities with molten metal under low pressure to obtain high-quality castings. Adjustable-gating low-pressure casting machines, through flexible gating adjustments, can better control the flow rate and filling method of the molten metal, meeting the production needs of different castings. This equipment is widely used in automotive parts manufacturing, aerospace precision casting, and other fields, and is of great significance for improving casting quality and reducing production costs. Through optimized gating design and automated control, it aims to achieve an efficient and precise casting process, driving the development and innovation of casting technology.

[0003] However, traditional low-pressure casting machines have many shortcomings. In terms of molten metal replenishment, traditional equipment often relies on manual operation, which is not only labor-intensive but also difficult to precisely control the timing of addition, easily leading to production interruptions, affecting work continuity, and increasing production costs. Furthermore, manual addition of molten metal also poses safety hazards, such as the risk of hot liquid splashing. Regarding mold fixing and replacement, traditional casting machines have complex mold fixing methods, and the installation and disassembly processes are cumbersome, requiring significant time and effort. This not only reduces production efficiency but also, during frequent mold changes, is prone to damage or inaccurate installation due to improper operation, affecting casting quality. In addition, the gates of traditional low-pressure casting machines are usually fixed, making it difficult to adapt to the needs of molds of different specifications and shapes, limiting the scope of equipment application and failing to meet diverse production requirements. These problems restrict the application and development of traditional low-pressure casting machines and urgently require solutions through technological innovation. Summary of the Invention

[0004] (a) Technical problems to be solved

[0005] This invention provides a low-pressure casting machine with an adjustable gate, which solves the problems mentioned in the background art.

[0006] (II) Technical Solution

[0007] To achieve the above objectives, the present invention provides the following technical solution: a low-pressure casting machine with an adjustable gating, comprising a holding furnace, wherein a feeding port is provided through the side surface of the holding furnace, and a one-way valve is provided at the feeding port; a holding cavity is provided on the upper surface of the holding furnace, wherein the holding cavity is connected to the feeding port; and further comprising: a casting mechanism, wherein the casting mechanism is fixedly installed on the upper surface of the holding furnace; and an auxiliary mechanism, wherein the auxiliary mechanism is fixedly installed on the casting mechanism; wherein the casting mechanism includes a sealing cover, the sealing cover is fixedly fastened to the middle upper surface of the holding furnace, and a sliding rod is symmetrically fixedly connected to the upper edge surface of the holding furnace; a sleeve rod is slidably connected to the outer surface of the sliding rod, and a sliding plate is fixedly connected to the end of the sleeve rod away from the sliding rod.

[0008] According to one embodiment of the present invention, the upper surface of the sealing cover is provided with an installation groove, a lower mold is fixedly embedded in the installation groove, and an upper mold is fixedly connected to the bottom surface of the sliding plate, wherein the upper mold and the lower mold are arranged facing each other.

[0009] According to one embodiment of the present invention, a conveying pipe is fixedly connected through the upper surface of the mounting groove, the bottom of the conveying pipe is disposed at the bottom of the insulation cavity, a limit ring is fixedly connected to the top inner surface of the insulation cavity, an extrusion plate is slidably connected to the inner surface of the insulation cavity, and the middle part of the extrusion plate is slidably sleeved on the outer surface of the conveying pipe.

[0010] According to one embodiment of the present invention, a drive rod is slidably connected through the upper edge surface of the sliding plate, a top plate is fixedly connected to the top of the drive rod, a spring is provided on the outer side of the drive rod, the top of the spring is fixedly connected to the lower surface of the top plate, and the bottom of the spring is fixedly connected to the upper surface of the sliding plate.

[0011] According to one embodiment of the present invention, the drive rod is configured as an electromagnetic rod, and a mating hole is provided through the upper surface of the sealing cover, with the bottom of the drive rod facing the mating hole.

[0012] According to one embodiment of the present invention, the auxiliary mechanism includes a plug-in groove, which is formed on the upper surface of the edge of the heat preservation furnace. A plug-in rod is symmetrically and fixedly connected to the bottom surface of the plug-in groove. A plug-in plate is slidably connected through the plug-in rod. A corrugated sheet is fixedly connected to the bottom of the plug-in plate. The bottom of the corrugated sheet is fixedly connected to the bottom surface of the plug-in groove.

[0013] According to one embodiment of the present invention, a slot is provided on the side surface of the mounting groove, an elastic rod is elastically inserted into the slot, a plug block is fixedly connected to the end of the elastic rod away from the slot, four plug blocks are fixedly spaced around the central axis of the sealing cover, and connecting rods are slidably inserted into both ends of the plug blocks.

[0014] According to one embodiment of the present invention, four plug-in blocks are combined into a ring shape by connecting rods. The upper surface of the plug-in blocks is set as an inclined surface. The combined central axis of the four plug-in blocks and the central axis of the conveying pipe are set as the same central axis. An inlay block is symmetrically and fixedly connected to the bottom surface of the lower mold. A gating pipe is fixedly connected through the middle bottom surface of the lower mold.

[0015] According to one embodiment of the present invention, a compression bladder is fixedly connected to the bottom of the insertion slot, and the top of the compression bladder is fixedly connected to the bottom surface of the insertion plate. A sliding groove is symmetrically formed on the side surface of the mounting slot, communicating with the internal cavity of the compression bladder. A fixing rod is elastically slidably connected within the sliding groove. An insertion interface is formed on the side surface of the insert block, facing the fixing rod. The upper surface of the top plate is connected to a hydraulic system, which drives the top plate downwards. When the top plate moves downwards, it first drives the sliding plate downwards along the sliding rod via the sleeve rod, causing the upper mold and lower mold to align and close. As the top plate continues to descend, the spring force is compressed, gradually increasing the squeezing force on the sliding plate, thus increasing the pressure on the sliding plate. The moving plate firmly presses the upper mold at its bottom onto the lower mold, while the drive rod moves downward relative to the sliding plate. Finally, the bottom of the drive rod enters the interior of the heat preservation furnace through the mating hole on the sealing cover until it contacts the upper surface of the extrusion plate in the heat preservation cavity. It is then electromagnetically attracted to the upper surface of the extrusion plate. At this time, as the top plate continues to move downward, it pushes the extrusion plate down along the inner wall of the heat preservation cavity through the drive rod, causing the air pressure in the cavity below the heat preservation cavity to slowly increase. The maximum downward movement distance of the extrusion plate does not exceed the feeding port. Under the pressure, the molten metal inside is squeezed through the bottom of the conveying pipe to the cavity of the lower mold at the top of the conveying pipe to complete the pouring. After molding, the top plate is moved upward to open the upper and lower molds and remove the part.

[0016] (III) Beneficial Effects

[0017] This invention provides a low-pressure casting machine with an adjustable gating. It has the following advantages:

[0018] (I) This low-pressure casting machine with adjustable gate can operate the entire machine through an external hydraulic system, which greatly reduces production costs and makes the casting machine easier to use. When the top plate moves up, it will pull the extrusion plate up until the extrusion plate contacts the limit ring and is blocked. The drive rod then disengages from the extrusion plate and resets normally. When the extrusion plate moves up, the bottom of the insulation chamber is under negative pressure, which means that molten metal is drawn into the chamber through the feeding port to replenish it. This achieves automated replenishment of molten metal during the production process, greatly improves the continuity of the casting machine's operation, avoids the drawback of needing to manually add molten metal, and further reduces production costs.

[0019] (II) In this low-pressure casting machine with adjustable gate, when the sliding plate moves down, it gradually contacts and squeezes the insertion plate, causing the insertion plate to move along the insertion rod into the insertion slot. That is, the insertion plate squeezes the extrusion bladder at the bottom, increasing the air pressure inside the extrusion bladder. Finally, the internal air pressure is delivered to the slide groove, increasing the air pressure inside the slide groove. Then, the fixed rod moves outward and finally enters the insertion interface in the insert block. This achieves automatic fixation of the lower mold during casting, greatly improving the working stability of the casting machine. When the casting machine resets, it automatically unlocks the fixation of the lower mold, greatly reducing the difficulty of disassembling and assembling the lower mold, greatly increasing the speed of changing the lower mold, and thus improving production efficiency.

[0020] (III) When the lower mold of this adjustable gate low-pressure casting machine is normally installed into the mounting groove on the sealing cover, the sprue on the lower mold will first contact the upper surface of the plug block. After the plug block with the inclined upper surface contacts the bottom of the sprue, the plug block and the connecting rod begin to expand outward under the extrusion state, and finally the inner surface of the plug block is attached to the outer surface of the sprue. This means that the casting machine can be adapted to lower molds with various sprue diameters, realize the variable gate, and greatly improve the application range of the casting machine. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0022] Figure 2 This is a schematic diagram of the sliding plate and its connection structure of the present invention;

[0023] Figure 3 This is a schematic diagram of the delivery pipe and its connection structure of the present invention;

[0024] Figure 4 This is a schematic diagram of the corrugated sheet and its connection structure of the present invention;

[0025] Figure 5 This is a schematic diagram of the mold and its connection structure according to the present invention;

[0026] Figure 6 This is a schematic diagram of the elastic rod and its connection structure of the present invention;

[0027] Figure 7 This is a schematic diagram of the structure of the inlay block of the present invention;

[0028] Figure 8 This is a schematic diagram of the structure of the plug-in block of the present invention.

[0029] In the diagram: 1. Insulation furnace; 2. Feeding port; 3. Insulation cavity; 4. Casting mechanism; 41. Sealing cover; 42. Sliding rod; 43. Sleeve rod; 44. Sliding plate; 45. Mounting groove; 46. Lower mold; 47. Upper mold; 48. Conveying pipe; 49. Limiting ring; 410. Extrusion plate; 411. Drive rod; 412. Top plate; 413. Spring; 414. Mating hole; 5. Auxiliary mechanism; 51. Insertion groove; 52. Insertion rod; 53. Insertion plate; 54. Corrugated sheet; 55. Slot; 56. Elastic rod; 57. Insertion block; 58. Connecting rod; 59. Inlay block; 510. Sprue; 511. Extrusion bladder; 512. Slide groove; 513. Fixing rod; 514. Insertion interface. Detailed Implementation

[0030] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] First embodiment: as follows Figures 1 to 8 As shown, the present invention provides a technical solution: a low-pressure casting machine with an adjustable gating, including a holding furnace 1, a feeding port 2 penetrating through the side surface of the holding furnace 1, wherein a one-way valve is provided at the feeding port 2, and a holding cavity 3 is formed on the upper surface of the holding furnace 1, wherein the holding cavity 3 is connected to the feeding port 2, and further includes:

[0032] Casting mechanism 4 is fixedly installed on the upper surface of the heat preservation furnace 1;

[0033] Auxiliary mechanism 5 is fixedly installed on casting mechanism 4;

[0034] The casting mechanism 4 includes a sealing cover 41, which is fixedly fastened to the upper surface of the middle part of the heat preservation furnace 1. A sliding rod 42 is symmetrically fixedly connected to the upper surface of the edge of the heat preservation furnace 1. A sleeve rod 43 is slidably connected to the outer surface of the sliding rod 42. A sliding plate 44 is fixedly connected to the end of the sleeve rod 43 away from the sliding rod 42.

[0035] The upper surface of the sealing cover 41 is provided with an installation groove 45, and a lower mold 46 is fixedly embedded in the installation groove 45. The bottom surface of the sliding plate 44 is fixedly connected to an upper mold 47, wherein the upper mold 47 and the lower mold 46 are positioned opposite each other.

[0036] A conveying pipe 48 is fixedly connected to the upper surface of the mounting groove 45. The bottom of the conveying pipe 48 is located at the bottom of the insulation cavity 3. A limit ring 49 is fixedly connected to the inner surface of the top of the insulation cavity 3. An extrusion plate 410 is slidably connected to the inner surface of the insulation cavity 3. The middle part of the extrusion plate 410 is slidably sleeved on the outer surface of the conveying pipe 48.

[0037] A drive rod 411 is slidably connected through the upper edge of the sliding plate 44. A top plate 412 is fixedly connected to the top of the drive rod 411. A spring 413 is provided on the outer side of the drive rod 411. The top of the spring 413 is fixedly connected to the lower surface of the top plate 412, and the bottom of the spring 413 is fixedly connected to the upper surface of the sliding plate 44.

[0038] The drive rod 411 is an electromagnetic rod, and a mating hole 414 is provided through the upper surface of the sealing cover 41. The bottom of the drive rod 411 is directly opposite the mating hole 414.

[0039] Second embodiment: as follows Figures 1 to 8 As shown, the auxiliary mechanism 5 includes a plug groove 51, which is opened on the upper surface of the edge of the heat preservation furnace 1. A plug rod 52 is symmetrically and fixedly connected to the bottom surface of the plug groove 51. A plug plate 53 is slidably connected through the plug rod 52. A corrugated sheet 54 is fixedly connected to the bottom of the plug plate 53. The bottom of the corrugated sheet 54 is fixedly connected to the bottom surface of the plug groove 51.

[0040] The side surface of the mounting groove 45 is provided with a slot 55. An elastic rod 56 is flexibly inserted into the slot 55. A plug block 57 is fixedly connected to the end of the elastic rod 56 away from the slot 55. Four plug blocks 57 are fixedly spaced around the central axis of the sealing cover 41. Connecting rods 58 are slidably inserted into both ends of the plug blocks 57.

[0041] Four plug-in blocks 57 are combined into a ring shape by connecting rods 58. The upper surface of the plug-in block 57 is set as an inclined surface. The central axis of the combination of the four plug-in blocks 57 and the central axis of the conveying pipe 48 are set as the same central axis. The bottom surface of the lower mold 46 is symmetrically and fixedly connected with an inlay block 59. The bottom surface of the middle part of the lower mold 46 is fixedly connected with a gating pipe 510.

[0042] A compression bladder 511 is fixedly connected to the bottom of the insertion slot 51, and the top of the compression bladder 511 is fixedly connected to the bottom surface of the insertion plate 53. A sliding groove 512 is symmetrically opened on the side surface of the mounting slot 45. The sliding groove 512 communicates with the internal cavity of the compression bladder 511. A fixing rod 513 is elastically slidably connected in the sliding groove 512. An insertion interface 514 is opened on the side surface of the inlay block 59, and the insertion interface 514 is directly opposite to the fixing rod 513.

[0043] During operation, the upper surface of the top plate 412 is connected to the hydraulic system. The hydraulic system drives the top plate 412 to move downward. When the top plate 412 moves downward, it first drives the sliding plate 44 to move downward along the sliding rod 42 via the sleeve rod 43, so that the upper mold 47 and the lower mold 46 are aligned and closed. At this time, as the top plate 412 continues to descend, the elastic force of the spring 413 is compressed, which gradually increases the squeezing force on the sliding plate 44, so that the sliding plate 44 firmly presses the upper mold 47 at its bottom onto the lower mold 46. At the same time, the drive rod 411 moves downward relative to the sliding plate 44. Finally, the bottom of the drive rod 411 enters the interior of the heat preservation furnace 1 through the mating hole 414 on the sealing cover 41, until it is in contact with the upper surface of the extrusion plate 410 in the heat preservation cavity 3. The parts are in surface contact and are electromagnetically attracted to the upper surface of the extrusion plate 410. As the top plate 412 continues to move downward, the extrusion plate 410 is pushed down along the inner wall of the insulation cavity 3 by the drive rod 411, causing the air pressure in the cavity below the insulation cavity 3 to slowly increase. The maximum downward movement distance of the extrusion plate 410 does not exceed the feeding port 2. Under the pressure, the molten metal inside is squeezed through the bottom of the conveying pipe 48 to the cavity of the lower mold 46 at the top of the conveying pipe 48 to complete the pouring. After molding, the top plate 412 is moved upward to open the upper mold 47 and the lower mold 46 to remove the parts. This means that the entire machine can be operated by an external hydraulic system, which greatly reduces production costs and simplifies the use of this casting machine. When the top plate 412 moves upward, it pulls the extrusion plate 410 upward until the extrusion plate 410 contacts and is blocked by the limit ring 49. The drive rod 411 then disengages from the extrusion plate 410 and resets normally. When the extrusion plate 410 moves upward, the bottom of the insulation chamber 3 is under negative pressure, which means that molten metal is drawn into the chamber through the feeding port 2 for replenishment. This achieves automated replenishment of molten metal during production, greatly improving the continuity of the casting machine's operation and avoiding the drawback of manually adding molten metal. It also further reduces production costs. When the sliding plate 44 moves downward, it gradually contacts and squeezes the insertion plate 53, causing the insertion plate 53 to move along the insertion rod 52 into the insertion slot 51. That is, the insertion plate 53 squeezes the extrusion bladder 511 at the bottom. The extrusion process increases the air pressure inside the extrusion bladder 511, which is then transferred to the slide groove 512. This increases the air pressure inside the slide groove 512, pushing the fixing rod 513 outwards until it enters the insertion interface 514 in the insert block 59. This automatically fixes the lower mold 46 during casting, significantly improving the stability of the casting machine. The automatic unlocking of the lower mold 46 during machine reset greatly reduces the difficulty of disassembling and assembling it, significantly increasing the speed of changing the lower mold 46 and thus improving production efficiency. When the lower mold 46 is properly installed into the mounting groove 45 on the sealing cover 41, the gating pipe 510 on the lower mold 46 will first contact the upper surface of the insertion block 57.After the inclined upper surface of the insert block 57 contacts the bottom of the gating pipe 510, under compression, the insert block 57 and the connecting rod 58 begin to expand outward, ultimately causing the inner surface of the insert block 57 to adhere to the outer surface of the gating pipe 510. This allows the casting machine to be adapted to lower molds 46 with various gating diameters, enabling variable gating and significantly improving the application range of the casting machine.

[0044] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0045] Although embodiments of the 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 invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A low-pressure casting machine with an adjustable gating system, comprising a holding furnace (1), characterized in that: The side surface of the heat preservation furnace (1) is provided with a feeding port (2), wherein a one-way valve is provided at the feeding port (2), and the upper surface of the heat preservation furnace (1) is provided with a heat preservation cavity (3), wherein the heat preservation cavity (3) is connected to the feeding port (2), and further includes: Casting mechanism (4), which is fixedly installed on the upper surface of the heat preservation furnace (1); Auxiliary mechanism (5), which is fixedly installed on casting mechanism (4); The casting mechanism (4) includes a sealing cover (41), which is fixedly fastened to the upper surface of the middle part of the heat preservation furnace (1). A sliding rod (42) is symmetrically fixedly connected to the upper surface of the edge of the heat preservation furnace (1). A sleeve rod (43) is slidably connected to the outer surface of the sliding rod (42). A sliding plate (44) is fixedly connected to the end of the sleeve rod (43) away from the sliding rod (42). The upper surface of the sealing cover (41) is provided with an installation groove (45), and a lower mold (46) is fixedly embedded in the installation groove (45). The bottom surface of the sliding plate (44) is fixedly connected to an upper mold (47), wherein the upper mold (47) and the lower mold (46) are arranged facing each other. The upper surface of the mounting groove (45) is fixedly connected to a conveying pipe (48), the bottom of the conveying pipe (48) is located at the bottom of the insulation cavity (3), the top inner surface of the insulation cavity (3) is fixedly connected to a limiting ring (49), the inner surface of the insulation cavity (3) is slidably connected to an extrusion plate (410), and the middle part of the extrusion plate (410) is slidably sleeved on the outer surface of the conveying pipe (48). A drive rod (411) is slidably connected through the upper edge of the sliding plate (44). A top plate (412) is fixedly connected to the top of the drive rod (411). A spring (413) is provided on the outer side of the drive rod (411). The top of the spring (413) is fixedly connected to the lower surface of the top plate (412), and the bottom of the spring (413) is fixedly connected to the upper surface of the sliding plate (44). The drive rod (411) is configured as an electromagnetic rod, and a mating hole (414) is provided through the upper surface of the sealing cover (41), with the bottom of the drive rod (411) facing the mating hole (414); The auxiliary mechanism (5) includes a plug groove (51), which is opened on the upper edge of the heat preservation furnace (1). A plug rod (52) is symmetrically and fixedly connected to the bottom surface of the plug groove (51). A plug plate (53) is slidably connected through the plug rod (52). A corrugated sheet (54) is fixedly connected to the bottom of the plug plate (53). The bottom of the corrugated sheet (54) is fixedly connected to the bottom surface of the plug groove (51). The bottom of the insertion slot (51) is fixedly connected to a compression bladder (511), the top of the compression bladder (511) is fixedly connected to the bottom surface of the insertion plate (53), the side surface of the mounting slot (45) is symmetrically provided with a sliding groove (512), the sliding groove (512) is connected to the internal cavity of the compression bladder (511), the sliding groove (512) is elastically slidably connected with a fixing rod (513), the bottom surface of the lower mold (46) is symmetrically fixedly connected with an insert block (59), the side surface of the insert block (59) is provided with an insertion interface (514), the insertion interface (514) is directly opposite to the fixing rod (513).

2. The low-pressure casting machine with an adjustable gating system according to claim 1, characterized in that: The mounting groove (45) has a slot (55) on its side surface. An elastic rod (56) is elastically inserted into the slot (55). A plug block (57) is fixedly connected to one end of the elastic rod (56) away from the slot (55). Four plug blocks (57) are fixedly spaced around the central axis of the sealing cover (41). Connecting rods (58) are slidably inserted into both ends of the plug blocks (57).

3. A low-pressure casting machine with an adjustable gating system according to claim 2, characterized in that: The four plug-in blocks (57) are combined into a ring shape by connecting rods (58). The upper surface of the plug-in block (57) is set as an inclined surface. The central axis of the combination of the four plug-in blocks (57) and the central axis of the conveying pipe (48) are set as the same central axis. The bottom surface of the lower mold (46) is fixedly connected to the gating pipe (510).

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