Precision casting process of hardware casting
Through the rotation and lifting mechanism combined with coolant control, continuous die casting of hardware castings is achieved, which improves casting efficiency and shortens the cycle, and solves the problem of long casting cycle in the prior art.
Patent Information
- Application Number
- CN202510433341.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-08
- Publication Date
- 2025-07-04
- Estimated Expiration
- Not applicable · inactive patent
AI Technical Summary
In the existing hardware casting die-casting process, the injection and removal of hot melt liquid metal liquid after molding is completed at the same station, resulting in an extended casting cycle and reduced efficiency.
The rotating mechanism drives multiple die-casting molds to perform intermittent circular motions, and combines the lifting mechanism and the coolant control mechanism to inject, cooling, and take out the molded castings at different stations, and the coolant conveying mechanism is used to achieve the recovery and reuse of the coolant.
It improves the casting efficiency of hardware castings, shortens the casting cycle, and ensures the molding quality of castings.
Smart Images
Figure CN120243864A_ABST
Abstract
Description
Technical Field
[0001] The present invention belongs to the technical field of precision casting, and particularly relates to a precision casting process for hardware castings. Background Art
[0002] A casting is a metal formed object obtained by various casting methods, that is, the smelted liquid metal is injected into a pre-prepared mold by pouring, die-casting or other casting methods. After cooling, through subsequent processing means such as grinding, an object with a certain shape, size and performance is obtained. Castings are widely used and have been specifically applied to industries such as construction, hardware, electrical appliances and lamps. Among them, the castings used in the hardware industry are collectively referred to as hardware castings.
[0003] The die-casting of hardware castings refers to a casting method in which the molten alloy is filled into the mold cavity under high pressure and high speed and cooled and formed under high pressure. It is a commonly used method with high efficiency and high precision in the production of hardware castings, especially suitable for metal parts with high surface quality requirements. In the prior art, when die-casting and manufacturing hardware castings, the injection of the molten metal in the form of a hot melt liquid and the removal of the formed hardware casting are completed at one station. During the cooling and forming process of the molten metal in the form of a hot melt liquid, the injection mechanism of the die-casting machine is still in a standby state. This not only lengthens the casting cycle of the hardware casting, but also reduces the casting efficiency of the hardware casting. Therefore, it is urgent to study a precision casting process for hardware castings to solve the above problems. Summary of the Invention
[0004] The present invention aims to provide a precision casting process for hardware castings, and its purpose is to solve the technical problems raised in the above background art.
[0005] To solve the above technical problems, the present invention is realized through the following technical solutions:
[0006] The present invention is a precision casting process for hardware castings, including the following steps:
[0007] Step 1: Drive a plurality of die-casting molds to perform intermittent circular motion through a rotating mechanism; when any die-casting mold moves to directly below the crucible, the die-casting mold stops rotating, and then drive the crucible to move downward through a lifting mechanism to insert the injection port of the crucible into the gate of the die-casting mold directly below it, and then the crucible starts to inject the molten metal in the form of a hot melt liquid into the die-casting mold directly below it;
[0008] Step 2: After the die-casting mold is filled, the crucible stops injecting materials. Meanwhile, the lifting mechanism drives the crucible to move upward to the reset position. Then, the rotation mechanism drives the die-casting mold to rotate horizontally by 90°. During the horizontal rotation of the die-casting mold, the coolant control mechanism connected to the die-casting mold that has just been filled gradually sucks the coolant in the coolant storage tank into the die-casting mold through the coolant delivery mechanism, and starts to cool the casting in the die-casting mold that has just been filled.
[0009] Step 4: The rotation mechanism drives the die-casting mold to rotate horizontally by 90° intermittently twice. The die-casting mold that has been rotated three times completes the cooling process, the die-casting mold that has been rotated twice continues the cooling process, and the die-casting mold that has been rotated once starts the cooling process. Whenever the die-casting mold rotates horizontally by 90°, the die-casting mold stops rotating once. At this time, the forming mold in the die-casting mold that has completed the cooling process is removed. Meanwhile, after a die-casting mold moves to the position directly below the crucible, the crucible injects the molten metal liquid in the hot-melt state into the die-casting mold directly below it. And after the crucible finishes the injection, it is driven upward by the lifting mechanism to the reset position.
[0010] Step 5: The rotation mechanism drives the die-casting mold to continue to rotate horizontally by 90°. During the horizontal rotation of the die-casting mold, the coolant control mechanism connected to the die-casting mold from which the formed casting is removed gradually squeezes the coolant in the die-casting mold back into the interior of the coolant storage tank through the coolant delivery mechanism.
[0011] Step 6: Repeat Steps 1 to 5 to realize the continuous die-casting operation of the casting.
[0012] As a preferred technical solution of the present invention, the rotation mechanism includes a base and a first motor vertically fixed on the lower surface of the base; the coolant storage tank is fixed on the upper surface of the base; the output shaft of the first motor penetrates the base with a clearance and is coaxially fixed with a transmission shaft; a first pulley is fixedly sleeved on the upper end of the transmission shaft; the first pulley is connected to a second pulley through a synchronous belt; the second pulley is fixedly sleeved on the outer circumference of a rotating shaft; the rotating shaft is vertically rotatably connected to the top wall of the coolant storage tank; a support plate is horizontally fixed at the top of the rotating shaft; a plurality of the die-casting molds are evenly distributed and fixed on the upper surface of the support plate.
[0013] As a preferred technical solution of the present invention, the die-casting mold includes a fixed mold fixed on the upper surface of the support plate and a movable mold arranged above the fixed mold; a molding chamber, a cooling chamber, a first chamber, and a second chamber are sequentially arranged on the fixed mold from top to bottom; the molding chamber is arranged on the upper surface of the fixed mold; a pair of cylinders are vertically fixed in the second chamber; the output ends of the two cylinders slide through the top wall of the first chamber and insert into the first chamber and are connected by a movable plate; a plurality of ejector pins are vertically fixed on the upper surface of the movable plate; the upper ends of the plurality of ejector pins all slide through the top wall of the first chamber and the top wall of the cooling chamber in sequence and can insert into the molding chamber.
[0014] As a preferred technical solution of the present invention, the lifting mechanism includes a guide rod vertically fixed on the upper surface of the base; a lifting block is slidably connected to the guide rod; the crucible is vertically fixed on the lifting block; a screw rod is vertically inserted through the lifting block, and the screw rod is threadedly connected to the lifting block; the lower end of the screw rod is rotatably connected to the upper surface of the base; the lower end of the screw rod is coaxially fixed on the output shaft of the second motor; the second motor is vertically fixed on the base.
[0015] As a preferred technical solution of the present invention, the coolant control mechanism includes a plurality of partitions respectively horizontally arranged in the cooling chambers of a plurality of fixed molds, and the edge of each partition is slidably abutted against the inner side wall of the corresponding cooling chamber; a plurality of through holes corresponding to the ejector pins are arranged side by side on each partition, and the plurality of ejector pins on each fixed mold respectively slide through the plurality of through holes on the corresponding partition; a pair of push-pull columns are vertically fixed on the lower surface of the plurality of partitions; the plurality of pairs of push-pull columns respectively slide through the fixed mold and the support plate in sequence and extend to the lower side of the support plate, and a bearing block is connected between the lower ends of each pair of push-pull columns; a tension spring is vertically fixed on the upper surface of each of the plurality of bearing blocks; the upper ends of the plurality of tension springs are fixed on the upper surface of the support plate; a disk cam is horizontally arranged between the plurality of bearing blocks; the disk cam is sleeved on the outer periphery of the rotating shaft, and the disk cam is in clearance fit with the rotating shaft; a plurality of brackets are uniformly fixed on the lower surface of the disk cam along the circumferential direction; the lower ends of the plurality of brackets are fixed on the top wall of the coolant storage tank; an installation plate is horizontally arranged above the disk cam; the installation plate is fixed on the outer periphery of the rotating shaft; a plurality of positioning blocks are uniformly fixed on the lower surface of the installation plate; sliding columns are horizontally inserted through the plurality of positioning blocks; one ends of the plurality of sliding columns are slidably abutted against the working surface of the disk cam; the other ends of the plurality of sliding columns are respectively rotatably connected to the plurality of bearing blocks.
[0016] As a preferred technical solution of the present invention, the lower end of the rotating shaft penetrates through the top wall of the coolant storage tank and extends to the bottom of the coolant storage tank; the coolant conveying mechanism includes a plurality of first infusion channels vertically opened in the rotating shaft and a plurality of second infusion channels respectively opened on the fixed mold; the plurality of first infusion channels respectively penetrate through the upper and lower end faces of the rotating shaft; the plurality of second infusion channels each have a first infusion end and a second infusion end; the plurality of first infusion ends are respectively arranged on one side wall of the plurality of fixed molds, and the plurality of second infusion ends are respectively arranged on the top walls of the plurality of cooling chambers; the upper ends of the plurality of first infusion channels and the plurality of first infusion ends are respectively connected by infusion tubes.
[0017] The present invention has the following beneficial effects:
[0018] The present invention drives a plurality of die-casting molds to perform intermittent circular motion through a rotating mechanism, injects molten metal liquid in a hot-melt liquid state into the die-casting mold directly below it through a crucible, then uses a coolant control mechanism to suck the coolant in the coolant storage tank into the die-casting mold that has just been filled through the coolant conveying mechanism, and after removing the formed casting in the die-casting mold, uses the coolant control mechanism again to squeeze the coolant in the die-casting mold from which the formed casting has been removed back into the interior of the coolant storage tank, which not only effectively improves the casting efficiency of the hardware casting, but also shortens the casting cycle of the hardware casting.
[0019] Of course, it is not necessary for any product implementing the present invention to achieve all the above-mentioned advantages simultaneously. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.
[0021] Figure 1 It is a schematic structural diagram of the connection between the rotating mechanism, the die-casting mold and the crucible of the present invention.
[0022] Figure 2 For Figure 1 the front view of the structure.
[0023] Figure 3 It is a schematic structural diagram of the connection between the rotating mechanism and the die-casting mold of the present invention.
[0024] Figure 4 It is a schematic structural diagram of the die-casting mold of the present invention.
[0025] Figure 5Schematic diagram of the connection structure between the crucible and the lifting mechanism of the present invention.
[0026] Figure 6 Schematic diagram of the structure of the coolant control mechanism of the present invention.
[0027] Figure 7 Schematic diagram of the structure where the partition plate of the present invention is arranged on the fixed mold.
[0028] Figure 8 Schematic diagram of the relative position between the disk cam and the sliding column of the present invention.
[0029] Figure 9 Schematic diagram of the structure where the disk cam of the present invention is arranged on the coolant storage tank.
[0030] In the drawings, the list of components represented by each reference numeral is as follows:
[0031] 1 - Rotating mechanism, 2 - Die casting mold, 3 - Crucible, 4 - Lifting mechanism, 5 - Coolant control mechanism, 6 - Coolant conveying mechanism, 7 - Coolant storage tank, 101 - Base, 102 - First motor, 103 - Transmission shaft, 104 - First pulley, 105 - Second pulley, 106 - Rotating shaft, 107 - Support plate, 201 - Fixed mold, 202 - Movable mold, 203 - Forming cavity, 204 - Cooling cavity, 205 - First cavity, 206 - Second cavity, 207 - Cylinder, 208 - Movable plate, 209 - Thimble, 401 - Guide rod, 402 - Lifting block, 403 - Screw, 404 - Second motor, 501 - Partition plate, 502 - Through hole, 503 - Push - pull column, 504 - Bearing block, 505 - Tension spring, 506 - Disk cam, 507 - Bracket, 508 - Mounting plate, 509 - Positioning block, 510 - Sliding column, 511 - Transmission rod, 601 - First infusion channel, 602 - Second infusion channel, 603 - Infusion pipe. Detailed implementation manners
[0032] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present invention.
[0033] Embodiment 1:
[0034] The present invention relates to a precision casting process for hardware castings, including the following steps:
[0035] Step 1: Drive the four die-casting molds 2 to perform intermittent circular motion through the rotating mechanism 1; when any one of the die-casting molds 2 moves to directly below the crucible 3, the die-casting mold 2 stops rotating, and then drive the crucible 3 to move downward through the lifting mechanism 4, so that the injection port of the crucible 3 is inserted into the gate of the die-casting mold 2 directly below it, and then the crucible 3 starts to inject the molten metal liquid in the molten state into the die-casting mold 2 directly below it;
[0036] Step 2: When the injection of the die-casting mold 2 is completed, the crucible 3 stops injecting material, and at the same time the lifting mechanism 4 drives the crucible 3 to move upward to reset, and then drive the die-casting mold 2 to rotate horizontally by 90° through the rotating mechanism 1. During the horizontal rotation of the die-casting mold 2, the coolant control mechanism 5 connected to the die-casting mold 2 that has just completed the injection gradually sucks the coolant in the coolant storage tank 7 into the die-casting mold 2 through the coolant delivery mechanism 6, and starts to cool the casting in the die-casting mold 2 that has just completed the injection;
[0037] Step 4: Drive the die-casting mold 2 to rotate horizontally by 90° intermittently twice through the rotating mechanism 1. The die-casting mold 2 that has been rotated three times completes the cooling process, the die-casting mold 2 that has been rotated twice continues the cooling process, and the die-casting mold 2 that has been rotated once starts the cooling process; every time the die-casting mold 2 rotates horizontally by 90°, the die-casting mold 2 stops rotating once. At this time, take out the molding mold in the die-casting mold 2 that has completed the cooling process. At the same time, when a die-casting mold 2 moves to directly below the crucible 3, inject the molten metal liquid in the molten state into the die-casting mold 2 directly below it through the crucible 3, and after the crucible 3 completes the injection, it is driven upward by the lifting mechanism 4 to reset;
[0038] Step 5: Drive the die-casting mold 2 to continue to rotate horizontally by 90° through the rotating mechanism 1. During the horizontal rotation of the die-casting mold 2, the coolant control mechanism 5 connected to the die-casting mold 2 from which the molded casting has been removed gradually squeezes the coolant in the die-casting mold 2 back into the interior of the coolant storage tank 7 through the coolant delivery mechanism 6;
[0039] Step 6: Repeat Steps 1 to 5 to realize continuous die-casting operation of the casting.
[0040] Example 2:
[0041] On the basis of Example 1 as Figure 1-3As shown in the figure, the rotating mechanism 1 includes a base 101 and a first motor 102 vertically bolted to the lower surface of the base 101; a coolant storage tank 7 is bolted to the upper surface of the base 101; the output shaft of the first motor 102 penetrates through the base 101 with a clearance and is coaxially fixed with a transmission shaft 103; a first pulley 104 is key-connected to the upper end of the transmission shaft 103; the first pulley 104 is connected to a second pulley 105 by a synchronous belt drive; the second pulley 105 is key-connected to the outer periphery of a rotating shaft 106; the rotating shaft 106 is vertically rotatably connected to the top wall of the coolant storage tank 7; a support plate 107 is horizontally bolted to the top end of the rotating shaft 106; four die-casting molds 2 are evenly distributed along the circumferential direction and bolted to the upper surface of the support plate 107. During use, the first motor 102 drives the rotating shaft 106 to rotate intermittently through the transmission shaft 103, the first pulley 104 and the second pulley 105, and each time the rotating shaft 106 rotates horizontally by 90°, the four die-casting molds 2 are driven by the support plate 107 to perform a circular motion, so as to realize the switching of the die-casting molds 2, which can ensure the continuity of the casting of the hardware castings and effectively improve the casting efficiency of the hardware castings; in addition, it should be noted that: the stop time of the rotating shaft 106 each time is mainly used for pouring the molten metal liquid in the molten state into the die-casting mold 2 directly below the crucible 3 and taking out the formed castings from the die-casting mold 2 that has completed cooling.
[0042] As shown in Figure 1-4 and Figure 7 the figure, the die-casting mold 2 is a conventional structure in the art; the die-casting mold 2 includes a fixed mold 201 bolted to the upper surface of the support plate 107 and a movable mold 202 arranged above the fixed mold 201; a forming cavity 203, a cooling cavity 204, a first cavity 205 and a second cavity 206 are sequentially arranged on the fixed mold 201 from top to bottom; the forming cavity 203, the cooling cavity 204, the first cavity 205 and the second cavity 206 are independent of each other; the forming cavity 203 is arranged on the upper surface of the fixed mold 201; a pair of conventional cylinders 207 in the art are vertically bolted in the second cavity 206; the output ends of the two cylinders 207 slide through the top wall of the first cavity 205 and insert into the first cavity 205 and are connected by a movable plate 208, and the movable plate 208 is bolted to the output end of the cylinder 207; a plurality of ejector pins 209 are vertically welded to the upper surface of the movable plate 208; the upper ends of the plurality of ejector pins 209 sequentially slide through the top wall of the first cavity 205 and the top wall of the cooling cavity 204 and can insert into the forming cavity 203. During use, by injecting coolant into the cooling cavity 204, the cooling treatment of the molten metal liquid in the forming cavity 203 is realized. Then, when the formed casting is cooled, the movable mold 202 is separated from the fixed mold 201, and at the same time, the cylinder 207 drives the ejector pins 209 to move upward through the movable plate 208, so as to realize ejecting the formed casting in the forming cavity 203, ensuring the casting efficiency of the hardware castings.
[0043] In addition, as Figure 1-2 and Figure 5 shown, the lifting mechanism 4 includes a guide rod 401 vertically bolted to the upper surface of the base 101; a lifting block 402 is slidably connected to the guide rod 401; the crucible 3 is vertically bolted to the lifting block 402; a screw rod 403 is vertically inserted through the lifting block 402, and the screw rod 403 is threadedly connected to the lifting block 402; the lower end of the screw rod 403 is rotatably connected to the upper surface of the base 101; the lower end of the screw rod 403 is coaxially fixed to the output shaft of the second motor 404; the second motor 404 is vertically bolted to the base 101. During use, when any die-casting mold 2 moves to directly below the crucible 3, the second motor 404 drives the screw rod 403 to rotate, causing the screw rod 403 to drive the crucible 3 to move downward through the lifting block 402, so that the injection port of the crucible 3 is inserted into the gate of the die-casting mold 2 directly below it. Then, the crucible 3 starts to inject the molten metal liquid in a hot-melt liquid state into the die-casting mold 2 directly below it. When the pouring of the die-casting mold 2 is completed, the crucible 3 stops injecting material, and at the same time, the lifting block 402 drives the crucible 3 to move upward to reset. This not only ensures the injection efficiency of the die-casting mold 2 but also avoids problems such as interference between the crucible 3 and the die-casting mold 2.
[0044] Embodiment Three:
[0045] Based on Embodiment Two, as Figure 1-4 and Figures 6-9As shown in the figure, the coolant control mechanism 5 includes four partitions 501 horizontally arranged in the cooling chambers 204 of the four fixed molds 201 respectively, and the edges of each partition 501 are in sliding contact with the inner side walls of the corresponding cooling chambers 204; a plurality of through holes 502 corresponding to the ejector pins 209 are arranged side by side on each partition 501, and the plurality of ejector pins 209 on each fixed mold 201 respectively slide through the plurality of through holes 502 on the corresponding partition 501; a pair of push-pull columns 503 are vertically welded to the lower surfaces of the four partitions 501; the multiple pairs of push-pull columns 503 respectively slide through the fixed mold 201 and the support plate 107 in sequence and extend below the support plate 107, and the lower ends of each pair of push-pull columns 503 are connected by a bearing block 504; the bearing block 504 is bolted to the push-pull column 503; a tension spring 505 is vertically welded to the upper surface of each of the four bearing blocks 504; the upper ends of the four tension springs 505 are welded to the upper surface of the support plate 107; a conventional disk cam 506 in the art is horizontally arranged among the four bearing blocks 504; the disk cam 506 is sleeved on the outer periphery of the rotating shaft 106, and the disk cam 506 is in clearance fit with the rotating shaft 106; four brackets 507 are bolted to the lower surface of the disk cam 506 along the circumferential direction; the lower ends of the four brackets 507 are bolted to the top wall of the coolant storage tank 7; an installation plate 508 is horizontally arranged above the disk cam 506; the installation plate 508 is bolted to the outer periphery of the rotating shaft 106; four positioning blocks 509 are bolted to the lower surface of the installation plate 508; slide columns 510 are horizontally inserted through the four positioning blocks 509; one ends of the four slide columns 510 are in sliding contact with the working surface of the disk cam 506; the other ends of the four slide columns 510 are respectively rotatably connected to the four bearing blocks 504; the lower end of the rotating shaft 106 penetrates through the top wall of the coolant storage tank 7 and extends to the bottom of the coolant storage tank 7, and the lower end of the rotating shaft 106 is immersed in the coolant in the coolant storage tank 7; a ventilation hole is opened at the upper edge of one side wall of the coolant storage tank 7, which can ensure the stable air pressure in the coolant storage tank 7; the coolant delivery mechanism 6 includes four first infusion channels 601 vertically opened in the rotating shaft 106 and four second infusion channels 602 respectively opened in the fixed mold 201; the four first infusion channels 601 respectively penetrate through the upper and lower end surfaces of the rotating shaft 106; each of the four second infusion channels 602 has a first infusion end and a second infusion end; the four first infusion ends are respectively arranged on one side wall of the four fixed molds 201, and the four second infusion ends are respectively arranged on the top walls of the four cooling chambers 204; the upper ends of the four first infusion channels 601 and the four first infusion ends are respectively connected by infusion pipes 603; the inside of the cooling chamber 204 is communicated with the inside of the coolant storage tank 7 through the second infusion channel 602, the infusion pipe 603 and the first infusion channel 601.During use, when any die-casting mold 2 moves to directly below the crucible 3, the upper surface of the partition plate 501 in the die-casting mold 2 fits against the top wall of the cooling chamber 204 on the die-casting mold 2. That is, at this time, there is no coolant in the cooling chamber 204 of the die-casting mold 2. After the die-casting mold 2 is filled with molten metal in a hot-melt liquid state, as the die-casting mold 2 makes a revolution, one end of the slide post 510 corresponding to the die-casting mold 2 slides on the working surface of the disk cam 506, prompting the tension spring 505 corresponding to the die-casting mold 2 to push the bearing block 504 below it downward, causing the partition plate 501 in the die-casting mold 2 to move downward. As a result, the coolant in the coolant storage tank 7 is sucked into the cooling chamber 204 of the die-casting mold 2 through the first infusion channel 601, the infusion pipe 603, and the second infusion channel 602. When the die-casting mold 2 rotates 90°, the lower surface of the partition plate 501 in the die-casting mold 2 fits against the bottom wall of the cooling chamber 204 on the die-casting mold 2, completing the suction of the coolant into the die-casting mold 2 and starting the refrigeration process for the die-casting mold 2. As the die-casting mold 2 rotates 90° twice, the slide post 510 corresponding to the die-casting mold 2 does not move at all. That is, the lower surface of the partition plate 501 in the die-casting mold 2 always fits against the bottom wall of the cooling chamber 204 on the die-casting mold 2. After the die-casting mold 2 removes the formed casting and continues to make a revolution, one end of the slide post 510 corresponding to the die-casting mold 2 slides on the working surface of the disk cam 506, prompting the slide post 510 to move linearly away from the disk cam 506. Then, through the transmission rod 511, the bearing block 504, and the push-pull post 503, the partition plate 501 is driven to move upward, realizing the pressure of the coolant in the die-casting mold 2 into the coolant storage tank 7 through the second infusion channel 602, the infusion pipe 603, and the first infusion channel 601. When the die-casting mold 2 rotates again to directly below the crucible 3, the upper surface of the partition plate 501 in the die-casting mold 2 fits against the top wall of the cooling chamber 204 on the die-casting mold 2. That is, at this time, there is no coolant in the cooling chamber 204 of the die-casting mold 2, thus realizing the return of the coolant to the coolant storage tank 7 for re-refrigeration. This not only effectively ensures the use effect of the coolant but also avoids the problem that the molten metal in a hot-melt liquid state in the die-casting mold 2 instantaneously solidifies due to the coolant stored in the cooling chamber 204, causing a decline in the quality of the formed casting, and ensures the casting quality of the hardware casting.
[0046] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific embodiments only. Obviously, many modifications and variations can be made according to the content of this specification. These embodiments are selected and specifically described in this specification in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can well understand and utilize the present invention. The present invention is only limited by the claims and their full scope and equivalents.
Claims
1. A precision casting process for a hardware casting, characterized in that, It includes the following steps: Step 1: Drive a plurality of die-casting molds (2) to perform intermittent circular motion through a rotating mechanism (1); when any one of the die-casting molds (2) moves to directly below the crucible (3), the die-casting mold (2) stops rotating, and then drive the crucible (3) to move downward through a lifting mechanism (4), so that the injection port of the crucible (3) is inserted into the gate of the die-casting mold (2) directly below it, and then the crucible (3) starts to inject molten liquid metal into the die-casting mold (2) directly below it; Step 2: When the pouring of the die-casting mold (2) is completed, the crucible (3) stops injecting material, and at the same time, the lifting mechanism (4) drives the crucible (3) to move upward to reset, and then drive the die-casting mold (2) to rotate horizontally by 90° through the rotating mechanism (1). During the horizontal rotation of the die-casting mold (2), the coolant control mechanism (5) connected to the die-casting mold (2) that has just completed pouring gradually sucks the coolant in the coolant storage tank (7) into the die-casting mold (2) through the coolant delivery mechanism (6), and starts to cool the casting in the die-casting mold (2) that has just completed pouring; Step 4: Drive the die-casting mold (2) to intermittently rotate horizontally by 90° twice through the rotating mechanism (1). The die-casting mold (2) that has been rotated three times has completed the cooling process, the die-casting mold (2) that has been rotated twice continues the cooling process, and the die-casting mold (2) that has been rotated once starts the cooling process; whenever the die-casting mold (2) rotates horizontally by 90°, the die-casting mold (2) stops rotating once. At this time, take out the molding mold in the die-casting mold (2) that has completed the cooling process. At the same time, when a die-casting mold (2) moves to directly below the crucible (3), inject molten liquid metal into the die-casting mold (2) directly below it through the crucible (3), and the crucible (3) is driven upward by the lifting mechanism (4) to reset after the pouring is completed; Step 5: Drive the die-casting mold (2) to continue rotating horizontally by 90° through the rotating mechanism (1). During the horizontal rotation of the die-casting mold (2), the coolant control mechanism (5) connected to the die-casting mold (2) from which the molded casting has been taken out gradually squeezes the coolant in the die-casting mold (2) back into the interior of the coolant storage tank (7) through the coolant delivery mechanism (6); Step 6: Repeat Steps 1 to 5 to realize continuous die-casting operation of the casting.
2. The precision casting process of a hardware casting according to claim 1, characterized in that, The rotation mechanism (1) includes a base (101) and a first motor (102) vertically fixed on the lower surface of the base (101); the coolant storage tank (7) is fixed on the upper surface of the base (101); the output shaft of the first motor (102) penetrates through the base (101) with a clearance and is coaxially fixed with a transmission shaft (103); a first pulley (104) is fixedly sleeved on the upper end of the transmission shaft (103); the first pulley (104) is connected to a second pulley (105) through a synchronous belt; the second pulley (105) is fixedly sleeved on the outer circumference of a rotating shaft (106); the rotating shaft (106) is vertically rotatably connected to the top wall of the coolant storage tank (7); a support plate (107) is horizontally fixed at the top of the rotating shaft (106); a plurality of the die-casting molds (2) are uniformly distributed and fixed on the upper surface of the support plate (107) along the circumferential direction.
3. The precision casting process of a hardware casting according to claim 2, characterized in that, The die-casting mold (2) includes a stationary mold (201) fixed on the upper surface of the support plate (107) and a movable mold (202) arranged above the stationary mold (201); a molding cavity (203), a cooling cavity (204), a first cavity (205) and a second cavity (206) are sequentially arranged on the stationary mold (201) from top to bottom; the molding cavity (203) is arranged on the upper surface of the stationary mold (201); a pair of cylinders (207) are vertically fixed in the second cavity (206); the output ends of the two cylinders (207) slide through the top wall of the first cavity (205) and insert into the first cavity (205) and are connected through a movable plate (208); a plurality of ejector pins (209) are vertically fixed on the upper surface of the movable plate (208); the upper ends of the plurality of ejector pins (209) sequentially slide through the top wall of the first cavity (205) and the top wall of the cooling cavity (204) and can insert into the molding cavity (203).
4. The precision casting process of a hardware casting according to claim 2, characterized in that, The lifting mechanism (4) includes a guide rod (401) vertically fixed on the upper surface of the base (101); a lifting block (402) is slidably connected to the guide rod (401); the crucible (3) is vertically fixed on the lifting block (402); a screw rod (403) is vertically inserted through the lifting block (402), and the screw rod (403) is threadedly connected to the lifting block (402); the lower end of the screw rod (403) is rotatably connected to the upper surface of the base (101); the lower end of the screw rod (403) is coaxially fixed to the output shaft of a second motor (404); the second motor (404) is vertically fixed on the base (101).
5. The precision casting process of a hardware casting according to claim 3, characterized in that, The coolant control mechanism (5) includes a plurality of partition plates (501) horizontally arranged in cooling chambers (204) respectively provided on a plurality of fixed molds (201), and the edge of each partition plate (501) is in sliding contact with the inner side wall of the corresponding cooling chamber (204); a plurality of through holes (502) corresponding to the ejector pins (209) are arranged side by side on each partition plate (501), and a plurality of ejector pins (209) on each fixed mold (201) respectively slide through a plurality of through holes (502) on the corresponding partition plate (501); a pair of push-pull columns (503) are vertically fixed on the lower surfaces of the plurality of partition plates (501); the plurality of pairs of push-pull columns (503) respectively slide through the fixed mold (201) and the support plate (107) in sequence and extend below the support plate (107), and a bearing block (504) is connected between the lower ends of each pair of push-pull columns (503).
6. The precision casting process of a hardware casting according to claim 5, characterized in that, Tension springs (505) are vertically fixed on the upper surfaces of the plurality of bearing blocks (504); the upper ends of the plurality of tension springs (505) are fixed on the upper surface of the support plate (107); a disk cam (506) is horizontally arranged between the plurality of bearing blocks (504); the disk cam (506) is sleeved on the outer circumference of the rotating shaft (106), and the disk cam (506) is in clearance fit with the rotating shaft (106); a plurality of brackets (507) are fixedly arranged on the lower surface of the disk cam (506) along the circumferential direction; the lower ends of the plurality of brackets (507) are fixed on the top wall of the coolant storage tank (7); an installation plate (508) is horizontally arranged above the disk cam (506); the installation plate (508) is fixed on the outer circumference of the rotating shaft (106); a plurality of positioning blocks (509) are uniformly fixed on the lower surface of the installation plate (508); sliding columns (510) are horizontally inserted through the plurality of positioning blocks (509); one ends of the plurality of sliding columns (510) are in sliding contact with the working surface of the disk cam (506); the other ends of the plurality of sliding columns (510) are rotatably connected with transmission rods (511); the ends of the plurality of transmission rods (511) far away from the sliding columns (510) are respectively rotatably connected to the plurality of bearing blocks (504).
7. The precision casting process of a hardware casting according to claim 6, characterized in that, The lower end of the rotating shaft (106) penetrates through the top wall of the coolant storage tank (7) and extends to the bottom of the coolant storage tank (7); the coolant delivery mechanism (6) includes a plurality of first infusion channels (601) vertically formed in the rotating shaft (106) and a plurality of second infusion channels (602) respectively formed on the fixed mold (201); the plurality of first infusion channels (601) respectively penetrate through the upper and lower end faces of the rotating shaft (106); the plurality of second infusion channels (602) each have a first infusion end and a second infusion end; the plurality of first infusion ends are respectively arranged on one side wall of the plurality of fixed molds (201), and the plurality of second infusion ends are respectively arranged on the top walls of the plurality of cooling chambers (204); the upper ends of the plurality of first infusion channels (601) and the plurality of first infusion ends are respectively connected by infusion tubes (603).