Low pressure casting mold with fiber filter screen

Abstract

The utility model relates to foundry technical field, and disclose a low pressure casting mould with fibre filter screen, it includes die casting main part, the die casting main part includes fixed mould, the upper portion of fixed mould is provided with movable mould, the inner wall of fixed mould is fixedly installed with inner gate, fixed subassembly, including the filter box of the inner gate top of casing, the outside of filter box is fixedly installed with the lantern ring, adjusting subassembly, including the opening and closing spare of movable mould one side, one side of movable mould is provided with the rotating lever, the utility model realizes rigid fixing through the thread transmission of thread sleeve and thread rod, and the elastic pre -tightness of cooperation elastic sheet makes filter screen and inner gate closely fit, thoroughly solves the displacement, the problem of warping caused by metal liquid impact, avoids the flow around, ensures that the impurity all is intercepted through filter screen, and the filtration efficiency improves greatly, and through five sliding blocks along the positioning ring circumferential sliding, can adjust the air duct opening and closing size flexibly.

Description

Technical Field

[0001] This utility model relates to the field of casting technology, specifically a low-pressure casting mold with a fiber filter screen. Background Technology

[0002] Low-pressure casting is a process in which low pressure is applied in a sealed crucible, causing molten metal to rise steadily along a riser tube and fill the mold cavity. Because of its smooth filling and high density of castings, it is widely used in the production of lightweight alloy castings such as aluminum alloys and magnesium alloys.

[0003] In existing casting molds, the filter screen is simply fitted onto the ingate without a dedicated positioning structure. Under the high-speed impact of molten metal, it is prone to displacement, deformation, or even local warping, resulting in gaps between the filter screen edge and the ingate, leading to unstable filtration. Furthermore, during the heat dissipation stage after casting, it is impossible to differentiate the airflow for thin-walled and thick-walled sections. Thick-walled areas accumulate more heat and have longer heat dissipation paths. If the airflow is not specifically increased, they will remain in a high-temperature softening state for a long time. On the other hand, thin-walled sections are small in volume and dissipate heat quickly. Under the same airflow, they will cool and harden rapidly, forming a rigid constraint. When the thick-walled areas shrink later, a large amount of residual stress will accumulate inside, causing the casting to warp or crack.

[0004] Therefore, it is necessary to provide a new low-pressure casting mold with a fiber filter to solve the above-mentioned technical problems. Utility Model Content

[0005] The purpose of this invention is to provide a low-pressure casting mold with a fiber filter screen to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a low-pressure casting mold with a fiber filter screen, comprising a die-casting body, wherein the die-casting body includes a fixed mold, a movable mold is disposed above the fixed mold, and an inner gate is fixedly installed on the inner wall of the fixed mold; The fixing assembly includes a filter box sleeved on the top of the ingate, a collar fixedly installed on the outside of the filter box, a threaded sleeve slidably connected to the inner wall of the collar, and a threaded rod threadedly connected to the inner wall of the threaded sleeve. The adjustment assembly includes an opening and closing member disposed on one side of the moving mold, a rotating rod disposed on one side of the moving mold, and a fixing member disposed on one side of the rotating rod.

[0007] Preferably, the die-casting body further includes a positioning plate fixedly connected to the top of the moving mold, a support column slidably connected to the inner wall of the positioning plate, a cylinder fixedly installed on the top of the support column through a fixed seat, a low-pressure gas cylinder adapted to be installed on one side of the fixed mold, a heat preservation furnace fixedly installed at the bottom of the fixed mold, and one side of the heat preservation furnace connected to the low-pressure gas cylinder through a pipe.

[0008] Preferably, the fixing component further includes a positioning block fixedly connected to one end of the threaded rod, and a spring sheet is fixedly connected to the inner wall of the collar.

[0009] Preferably, the opening and closing component further includes a positioning ring fixedly connected to one side of the moving mold, a slider is slidably connected to the inner wall of the positioning ring, and a positioning sleeve is fixedly connected to one side of the positioning ring.

[0010] Preferably, the opening and closing component further includes a sliding plate rotatably connected to the inner wall of the positioning sleeve, and a rotating rod is fixedly connected to one side of the sliding plate.

[0011] Preferably, the fixing member further includes a positioning rod slidably connected to the inner wall of the rotating rod, and a fixing rod is fixedly connected to one side of the positioning rod.

[0012] Preferably, the fixing member further includes a spring sleeved on the surface of the positioning rod, and the surface of the moving mold is provided with multiple limiting holes.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows: This invention achieves rigid fixation through the threaded transmission of the threaded sleeve and threaded rod. Combined with the elastic preload of the spring plate, it ensures a tight fit between the filter screen and the inner gate, completely solving the problems of displacement and warping caused by molten metal impact, preventing flow around, and ensuring that all impurities are intercepted by the filter screen, thus significantly improving filtration efficiency. Furthermore, by having five sliders slide along the circumference of the positioning ring, the opening and closing of the air duct can be flexibly adjusted. In areas with thick walls where heat is stored and dissipated slowly, the air duct opening can be increased to enhance airflow and accelerate heat dissipation in thick-walled areas, thereby preventing them from being in a high-temperature softening state for a long time. In thin-walled areas, the air duct opening can be decreased to reduce airflow and slow down the cooling rate of the thin wall, preventing it from hardening rapidly and forming a rigid constraint. Attached Figure Description

[0014] Figure 1 A schematic diagram of a preferred embodiment of the low-pressure casting mold with a fiber filter screen provided by this utility model; Figure 2 This is a cross-sectional structural diagram of the support column in this utility model; Figure 3 This is a schematic diagram of the fixing component in this utility model; Figure 4 This is a schematic diagram of the adjustment component in this utility model; Figure 5 This is a schematic diagram of the opening and closing component in this utility model; Figure 6 This is a schematic diagram of the opening and closing component from another perspective in this utility model.

[0015] In the diagram: 100, Die-casting body; 101, Fixed mold; 102, Moving mold; 103, Inner gate; 104, Positioning plate; 105, Support column; 106, Cylinder; 107, Low-pressure gas cylinder; 108, Insulation furnace; 200, Fixing component; 201, Filter box; 202, Collar; 203, Threaded sleeve; 204, Threaded rod; 205, Positioning block; 206, Spring; 300, Adjusting component; 301, Opening / closing component; 3011, Positioning ring; 3012, Slider; 3013, Positioning sleeve; 3014, Slide plate; 302, Rotating rod; 303, Fixing component; 3031, Positioning rod; 3032, Fixing rod; 3033, Spring; 3034, Limiting hole. Detailed Implementation

[0016] 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.

[0017] Please see Figure 1-6 As shown, a low-pressure casting mold with a fiber filter screen includes a die-casting body 100, which includes a fixed mold 101, a movable mold 102 disposed above the fixed mold 101, and an inner gate 103 fixedly installed on the inner wall of the fixed mold 101; a fixing assembly 200, including a filter box 201 sleeved on top of the inner gate 103, a collar 202 fixedly installed on the outer side of the filter box 201, a threaded sleeve 203 slidably connected to the inner wall of the collar 202, and a threaded rod 204 threadedly connected to the inner wall of the threaded sleeve 203; and an adjusting assembly 300, including a component disposed on the movable mold 101. The opening and closing part 301 on one side of the 2nd mold 102 is provided with a rotating rod 302 on one side of the moving mold 102 and a fixing part 303 on one side of the rotating rod 302. The die casting body 100 also includes a positioning plate 104 fixedly connected to the top of the moving mold 102. A support column 105 is slidably connected to the inner wall of the positioning plate 104. A cylinder 106 is fixedly installed on the top of the support column 105 through a fixing seat. A low-pressure gas cylinder 107 is adapted to be installed on one side of the fixed mold 101. A heat preservation furnace 108 is fixedly installed at the bottom of the fixed mold 101, and one side of the heat preservation furnace 108 is connected to the low-pressure gas cylinder 107 through a pipe.

[0018] The die-casting body 100 serves as the overall frame of the mold, integrating core components such as the fixed mold 101 and the moving mold 102, providing basic structural support for the casting. The moving mold 102 has internal air ducts to facilitate heat dissipation from the cast parts. The fixed mold 101 and the moving mold 102 cooperate to form a closed cavity, which is the forming cavity for the casting. It remains fixed during the casting process, and the shape of its inner wall determines the partial shape of the casting, providing forming space for the solidification of the molten metal. When the moving mold 102 moves towards the fixed mold 101, it closes with the fixed mold 101 during mold closing. Together, they form a complete cavity. Upon mold opening, they separate from the fixed mold 101, facilitating the removal of the formed casting and completing the casting process, thus facilitating the demolding stage. The ingate 103 serves as the channel for molten metal to enter the cavity, controlling the speed, flow rate, and direction of the molten metal, ensuring its orderly filling of the cavity, and also playing a role in stabilizing the flow of the molten metal. The positioning plate 104 is installed on top of the moving mold 102, cooperating with the support column 105 to provide guidance and positioning for the vertical movement of the moving mold 102, ensuring the stability of the moving mold. During the mold opening and closing process, the moving mold 102 can align with the fixed mold 101 to ensure the dimensional accuracy of the cavity and avoid casting scrap due to misalignment. The support column 105 provides vertical support for the positioning plate 104, moving mold 102, etc., and bears part of the load during mold opening and closing and casting process; on the other hand, it serves as a guide for the sliding of the positioning plate 104, ensuring the straightness and stability of the moving mold 102's movement. The cylinder 106 serves as a power source, driving the moving mold 102 to complete the opening and closing action, converting air pressure into mechanical energy to achieve... Mold opening and closing control improves casting production efficiency and stabilizes the power output for mold opening and closing. Low-pressure gas cylinder 107 introduces low-pressure gas into the casting system, creating a pressure difference on the surface of the molten metal in the holding furnace 108. The gas pressure is used to smoothly press the molten metal into the mold cavity, which is a key piece of equipment for realizing low-pressure casting process. It controls the pressure and speed of molten metal filling to ensure filling quality. The holding furnace 108 continuously heats and keeps the molten metal in the furnace at a suitable casting temperature range, avoiding the molten metal from cooling down too quickly and affecting the filling effect.

[0019] The fixing component 200 includes a filter box 201 sleeved on the top of the inlet gate 103. A collar 202 is fixedly installed on the outer side of the filter box 201. A threaded sleeve 203 is slidably connected to the inner wall of the collar 202. A threaded rod 204 is threadedly connected to the inner wall of the threaded sleeve 203. The fixing component 200 also includes a positioning block 205 fixedly connected to one end of the threaded rod 204. A spring piece 206 is fixedly connected to the inner wall of the collar 202.

[0020] The filter box 201 is used to intercept impurities in the molten metal. The collar 202 serves as the mounting carrier for the filter box 201, connecting to the filter box 201 on the outside and integrating a threaded sleeve 203 and a spring 206 on the inner wall. It cooperates with the ingate 103 and the threaded rod 204, serving as the structural integration element. The threaded sleeve 203 slides on the inner wall of the collar 202 and is threadedly engaged with the threaded rod 204. Through threaded transmission, the rotational motion of the threaded rod 204 is converted into a tightening force between the collar 202 and the filter box 201. The rotation of the threaded rod 204 drives the threaded sleeve 203 to move, cooperating with the collar 202 to realize the movement of the filter box 201. The installation and positioning of the ingate 103 can also help adjust the tightness of the fixation. The positioning block 205 is fixed to one end of the threaded rod 204. On the one hand, it is convenient for the operator to rotate the threaded rod 204. On the other hand, it can limit the movement stroke of the threaded rod 204 to avoid excessive rotation that could cause the structure to detach, thus ensuring the stability of the component. The spring piece 206 is fixed to the inner wall of the collar 202. It uses the extrusion force generated by elastic deformation to provide pre-tightening force for the fit between the collar 202 and the ingate 103, threaded sleeve 203 and other components, thus helping the threaded structure to achieve a more stable fixation. At the same time, it can absorb small vibrations during installation and casting to prevent parts from loosening.

[0021] The adjustment component 300 includes an opening and closing component 301 disposed on the side of the moving mold 102. A rotating rod 302 is disposed on one side of the moving mold 102, and a fixing component 303 is disposed on one side of the rotating rod 302. The opening and closing component 301 also includes a positioning ring 3011 fixedly connected to one side of the moving mold 102. A slider 3012 is slidably connected to the inner wall of the positioning ring 3011. A positioning sleeve 3013 is fixedly connected to one side of the positioning ring 3011. The opening and closing component 301 also includes a sliding plate 3014 rotatably connected to the inner wall of the positioning sleeve 3013. A rotating rod 302 is fixedly connected to one side of the sliding plate 3014. The fixing component 303 also includes a positioning rod 3031 slidably connected to the inner wall of the rotating rod 302. A fixing rod 3032 is fixedly connected to one side of the positioning rod 3031. The fixing component 303 also includes a spring 3033 sleeved on the surface of the positioning rod 3031. A plurality of limiting holes 3034 are opened on the surface of the moving mold 102.

[0022] The opening / closing component 301 faces the air duct on the inner wall of the moving mold 102. The number of opening / closing components 301 is the same as the number of air ducts. A fixing block is provided on the other side of the slider 3012, allowing the slider 3012 to slide in the groove on the inner wall of the slide plate 3014. The number of sliders 3012 is set to five. A limit block is provided on the other side of the slider 3012, allowing the slider 3012 to slide in the groove in the positioning ring 3011. In the adjusting assembly 300, the positioning ring 3011 serves as the movement track of the slider 3012, providing circumferential guidance for the opening / closing component 301. The constraint, fixedly connected to the moving mold 102, serves as the base carrier for the installation of the opening and closing component 301. Its movement trajectory is synchronous translation with the moving mold 102, without any active displacement of its own, only providing a static guiding structure. The slider 3012 slides on the inner wall of the positioning ring 3011, and its position can be adjusted along the circumference of the positioning ring 3011, thereby allowing the five sliders 3012 to cooperate and adjust the opening and closing size of the air duct. This is used to adapt to different sized molds and control the airflow speed during cooling. Its movement trajectory is a circular sliding along the inner annular wall of the positioning ring 3011, and can be adjusted by manually controlling the rotating rod 302. At an angle within the positioning ring 3011, the positioning sleeve 3013 connects the positioning ring 3011 and the slide plate 3014, providing a rotation fulcrum for the slide plate 3014. Its structure limits the rotation range of the slide plate 3014, ensuring the stability of the opening and closing action. The positioning sleeve 3013 serves as the static rotation base for the slide plate 3014. When the slide plate 3014 rotates, it can drive the rotating rod 302 to adjust its angle, thereby controlling the position of the fixing component 303. The movement trajectory of the slide plate 3014 is a circular oscillation centered on the rotation axis of the inner wall of the positioning sleeve 3013, changing its position through rotation. The rotating rod 302 controls the displacement of the rotating rod 302 by its own angle; the rotating rod 302 drives the fixing part 303 to rotate, and follows the circumferential swing of the slide plate 3014 to make synchronous angle deflection. The positioning rod 3031 is slidably connected to the inner wall of the rotating rod 302 and can extend and retract along the axis of the rotating rod 302. It is locked by inserting into the limiting hole 3034 of the moving mold 102 and unlocked by pulling it out. It is the core actuator for fixing and releasing the moving mold 102. The movement trajectory is a linear reciprocating slide along the inner wall of the rotating rod 302. It is controlled by the elastic force of the spring 3033 and the external operating force to realize the insertion or withdrawal of the limiting hole 3034.The fixing rod 3032 is fixed to one end of the positioning rod 3031. On the one hand, it provides limiting support for the spring 3033, and on the other hand, it serves as an operating force point to assist in controlling the extension and retraction of the positioning rod 3031. The movement trajectory is a linear reciprocating motion synchronized with the positioning rod 3031. The fixing rod 3032 is used to prevent the positioning rod 3031 from derailing. The spring 3033 is sleeved on the surface of the positioning rod 3031 to provide continuous elastic force, pre-tightening the positioning rod 3031 in the direction of insertion into the limiting hole 3034. To ensure the reliability of the locked state, unlocking requires overcoming the elastic force of spring 3033 to pull out the positioning rod 3031. The movement trajectory is axial compression or extension following the linear sliding of the positioning rod 3031. When the positioning rod 3031 is inserted, spring 3033 is compressed to store energy; when pulled out, spring 3033 extends and resets. A limiting hole 3034 is formed on the surface of the moving mold 102, cooperating with the positioning rod 3031 to limit the relative displacement between the moving mold 102 and the opening / closing part 301, thus fixing the size of the air duct.

[0023] Working principle: First, place the filter box 201 on top of the ingate 103, aligning the filter surface with the flow channel of the ingate 103. Then, place the collar 202 on top of the ingate 103 along with the filter box 201. Screw the threaded rod 204 into the threaded sleeve 203. Rotate the positioning block 205 to drive the threaded rod 204 to move axially along the threaded sleeve 203, gradually tightening the collar 202 towards the ingate 103. As the collar 202 approaches the ingate 103, the spring sheet 206 on the inner wall of the collar 202 will undergo elastic deformation due to the compression of the outer wall of the ingate 103. This generates a continuous clamping force. When the threaded rod 204 is screwed into the collar 202 and fits against the ingate 103 and the spring piece 206, the rotation stops. Relying on the self-locking of the thread, the filter box 201 is fixed. After casting is completed, the fixing rod 3032 is manually pulled, causing the positioning rod 3031 to slide outward along the inner wall of the rotating rod 302, overcoming the elastic force of the spring 3033 and pulling out from the limiting hole 3034, releasing the lock on the rotating rod 302. Rotating the rotating rod 302 causes the fixedly connected sliding plate 3014 to swing in a circular motion around the rotation axis of the positioning sleeve 3013. At this time, the inner wall groove of the slide plate 3014 slides relative to the fixed block of the slider 3012, pushing the five sliders 3012 to slide synchronously in a circle along the annular groove of the positioning ring 3011. The opening and closing size of the sliders 3012 is adjusted by the mold thickness near each air duct. When the air duct size is adjusted to the target state, the fixed rod 3032 is released, the spring 3033 elastically returns to its original position, and the positioning rod 3031 is pushed to slide inward along the inner wall of the rotating rod 302, and re-inserted into the limiting hole 3034 at the corresponding position of the moving mold 102, thus aligning the rotating rod 302 and the slide plate 3012. The positions of 014 and slider 3012 are locked to ensure that the size of the air duct remains stable during the casting cooling process and will not shift due to vibration or external force. After cooling is completed, the mold is finished. At this time, the positioning block 205 is rotated in the opposite direction to drive the threaded rod 204 to exit from the threaded sleeve 203, so that the clamping force between the collar 202 and the inner gate 103 is gradually released. When the elastic deformation of the spring piece 206 is restored and the collar 202 is loosened, the collar 202 and the inner filter box 201 are removed from the inner gate 103 to complete the disassembly. Check whether the filter box 201 needs to be replaced.

[0024] 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.

[0025] 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 low-pressure casting mold with a fiber filter screen, characterized in that: The die-casting body (100) includes a fixed mold (101), a movable mold (102) is provided above the fixed mold (101), and an inner gate (103) is fixedly installed on the inner wall of the fixed mold (101). The fixing assembly (200) includes a filter box (201) sleeved on the top of the ingate (103), a collar (202) is fixedly installed on the outside of the filter box (201), a threaded sleeve (203) is slidably connected to the inner wall of the collar (202), and a threaded rod (204) is threadedly connected to the inner wall of the threaded sleeve (203). The adjustment assembly (300) includes an opening and closing member (301) disposed on one side of the moving mold (102), a rotating rod (302) disposed on one side of the moving mold (102), and a fixing member (303) disposed on one side of the rotating rod (302).

2. The low-pressure casting mold with a fiber filter screen according to claim 1, characterized in that: The die-casting body (100) also includes a positioning plate (104) fixedly connected to the top of the moving mold (102). A support column (105) is slidably connected to the inner wall of the positioning plate (104). A cylinder (106) is fixedly installed on the top of the support column (105) through a fixed seat. A low-pressure gas cylinder (107) is adapted to be installed on one side of the fixed mold (101). A heat preservation furnace (108) is fixedly installed on the bottom of the fixed mold (101), and one side of the heat preservation furnace (108) is connected to the low-pressure gas cylinder (107) through a pipe.

3. A low-pressure casting mold with a fiber filter screen according to claim 1, characterized in that: The fixing component (200) also includes a positioning block (205) fixedly connected to one end of the threaded rod (204), and a spring piece (206) is fixedly connected to the inner wall of the collar (202).

4. A low-pressure casting mold with a fiber filter screen according to claim 1, characterized in that: The opening and closing component (301) also includes a positioning ring (3011) fixedly connected to one side of the moving mold (102), a slider (3012) is slidably connected to the inner wall of the positioning ring (3011), and a positioning sleeve (3013) is fixedly connected to one side of the positioning ring (3011).

5. A low-pressure casting mold with a fiber filter screen according to claim 4, characterized in that: The opening and closing component (301) also includes a sliding plate (3014) rotatably connected to the inner wall of the positioning sleeve (3013), and a rotating rod (302) is fixedly connected to one side of the sliding plate (3014).

6. A low-pressure casting mold with a fiber filter screen according to claim 1, characterized in that: The fixing member (303) also includes a positioning rod (3031) slidably connected to the inner wall of the rotating rod (302), and a fixing rod (3032) is fixedly connected to one side of the positioning rod (3031).

7. A low-pressure casting mold with a fiber filter screen according to claim 6, characterized in that: The fixing member (303) also includes a spring (3033) sleeved on the surface of the positioning rod (3031), and the surface of the moving mold (102) is provided with a plurality of limiting holes (3034).

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