Conical ceramic core mold

Abstract

This invention provides a conical ceramic core mold, relating to the field of precision casting technology. A movable block with a conical inclined surface at its bottom is inserted into the molding cavity through a through hole in the upper mold plate, allowing a conical ceramic core to be formed within the cavity. After the ceramic core is formed, the movable block is first removed from the through hole. Due to the through hole's guiding function, the movable block can only be removed vertically. Then, the upper mold plate is removed, and an ejector mechanism drives the conical ceramic core to move vertically along its own axis. This effectively avoids surface scratches when removing the formed conical ceramic core, and simplifies the operation. It alleviates the technical problems of existing ceramic core molds, such as difficulty in removing the mold, easy scratches on the ceramic core during demolding, affecting its use, and high skill requirements for operators.

Description

Technical Field

[0001] This invention relates to the field of precision casting technology, and in particular to a conical ceramic core mold. Background Technology

[0002] In the production of wax models for castings, the ceramic core is a crucial component and a key factor determining the quality of the casting. The ceramic core, short for a ceramic core used in investment casting, serves as a transitional element forming the cavity of the casting. Its function is to create the internal cavity structure of the casting and, together with the outer mold and shell, ensure the dimensional accuracy of the cavity in the casting.

[0003] In existing molds, the ceramic core slurry is injected into the mold through the feed port at the top of the mold. After the ceramic core is formed, the upper mold plate can be removed to take out the ceramic core.

[0004] However, existing ceramic core molds are difficult to remove, and the ceramic core is easily scratched during demolding, affecting its use. They also require high skill levels from operators. Summary of the Invention

[0005] The purpose of this invention is to provide a conical ceramic core mold to alleviate the technical problems of existing ceramic core molds, such as difficulty in demolding, easy scratching of the ceramic core during demolding, affecting use, and high skill requirements for operators.

[0006] In a first aspect, the conical ceramic core mold provided by the present invention includes: an upper template, a lower template, a movable block, and an ejection mechanism;

[0007] A molding cavity is formed between the upper template and the lower template. The upper template has a through hole, and the bottom of the movable block has a conical inclined surface. The movable block extends into the molding cavity through the through hole, and the conical inclined surface is located in the molding cavity to form a conical ceramic core in the molding cavity.

[0008] The end of the ejection mechanism extends through the lower template into the molding cavity. The ejection mechanism is configured to drive the molded conical ceramic core to move vertically along its own axis.

[0009] In an optional implementation,

[0010] The ejection mechanism includes an ejection cylinder, a rotating shaft, and a pull rod handle;

[0011] The end of the ejector cylinder has a conical groove, and the end of the movable block has a conical protrusion that can extend into the conical groove.

[0012] The end of the ejector cylinder away from the movable block abuts against the rotating shaft, and the rotating shaft is configured to drive the ejector cylinder to move along its own axis when rotating;

[0013] The end of the rotating shaft is connected to the pull rod handle, which is used to drive the rotating shaft to rotate.

[0014] In an optional implementation,

[0015] The rotating shaft has a flat surface and a curved surface on its side. In a stationary state, the ejector cylinder abuts against the flat surface. In the ejector state, the rotating shaft rotates, and the curved surface abuts against the ejector cylinder. The rotation of the curved surface drives the ejector cylinder to move.

[0016] In an optional implementation,

[0017] The conical ceramic core mold also includes a forming positioning block;

[0018] The lower template is provided with a forming groove, the forming positioning block is disposed in the forming groove, and the top of the forming positioning block abuts against the upper template. The forming positioning block has a forming hole, the movable block extends into the forming hole, and the conical ceramic core is formed in the cavity between the outer wall of the movable block and the inner wall of the forming positioning block.

[0019] In an optional implementation,

[0020] The conical ceramic core mold also includes a slider;

[0021] The lower template is provided with multiple sliding grooves, the axes of which are all oriented toward the axis of the lower template. Each sliding groove is provided with a slider, which slides in the sliding groove.

[0022] The side wall of the molding positioning block is provided with multiple insertion holes, and the slider has an insertion protrusion on the side facing the molding positioning block. The insertion protrusion extends into the molding cavity through the insertion hole.

[0023] In an optional implementation,

[0024] The lower template is provided with a stop block, which is used to limit the movement range of the slider.

[0025] In an optional implementation,

[0026] The upper template has a snap-fit ​​groove on the side facing the lower template, and the top of the slider extends into the snap-fit ​​groove.

[0027] In an optional implementation,

[0028] The top of the upper template has a relief groove, which communicates with the through hole. The outer circumferential surface of the movable block is recessed inward to form a take-out groove, and the horizontal position of the take-out groove is higher than the bottom of the relief groove.

[0029] In an optional implementation,

[0030] The conical ceramic core mold also includes an upper cover plate;

[0031] The upper cover plate is placed on the upper template, and a feed inlet is formed between the upper cover plate and the upper template. The feed end of the feed inlet is set in a conical shape.

[0032] The upper template has a feeding channel arranged in a vertical direction, and the feeding channel is connected to the feeding port and the forming cavity respectively.

[0033] In an optional implementation,

[0034] The conical ceramic core mold also includes guide pillars;

[0035] The guide post is installed on the top of the upper template, and the upper cover plate has a guide hole through which the guide post passes to restrict the removal direction of the upper cover plate.

[0036] The conical ceramic core mold provided by this invention involves inserting a movable block with a conical inclined surface at the bottom through a through hole on the upper template into the molding cavity, thereby forming a conical ceramic core in the molding cavity. After the ceramic core is formed, the movable block is first removed from the through hole. Due to the through hole, it acts as a guide, and the movable block can only be removed in a vertical direction. Then, the upper template is removed, and the ejection mechanism is used to drive the conical ceramic core to move vertically along its own axis. This effectively avoids surface scratches when the formed conical ceramic core is removed, and the operation is simpler. It alleviates the technical problems of existing ceramic core molds, such as difficulty in removing the mold, easy scratches on the ceramic core during demolding, affecting use, and high skill requirements for operators. Attached Figure Description

[0037] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0038] Figure 1 This is a cross-sectional view of the overall structure of the conical ceramic core mold provided in an embodiment of the present invention;

[0039] Figure 2This is a schematic diagram of the ejection mechanism in the conical ceramic core mold provided in an embodiment of the present invention;

[0040] Figure 3 This is a schematic diagram of the structure of the lower mold and the slider in the conical ceramic core mold provided in an embodiment of the present invention;

[0041] Figure 4 This is a schematic diagram of the structure of the forming positioning block in the conical ceramic core mold provided in an embodiment of the present invention;

[0042] Figure 5 This is a schematic diagram of the structure of the lower template in the conical ceramic core mold provided in an embodiment of the present invention;

[0043] Figure 6 This is a schematic diagram of the structure of the movable block in the conical ceramic core mold provided in an embodiment of the present invention;

[0044] Figure 7 This is a schematic diagram of the upper template with guide pillars in the conical ceramic core mold provided in an embodiment of the present invention;

[0045] Figure 8 This is a schematic diagram of the upper template in the conical ceramic core mold provided in an embodiment of the present invention;

[0046] Figure 9 This is a schematic diagram of the overall structure of the conical ceramic core mold provided in an embodiment of the present invention.

[0047] Icons: 100-Upper template; 110-Snap-fit ​​groove; 120-Lean-out groove; 130-Feeding channel; 140-Through hole; 200-Lower template; 210-Forming groove; 220-Sliding groove; 230-Stop block; 300-Moving block; 310-Conical inclined surface; 320-Removal groove; 330-Conical protrusion; 400-Ejection mechanism; 410-Ejection cylinder; 411-Conical groove; 420-Rotating shaft; 421-Flat surface; 422-Arc surface; 430-Pull rod handle; 500-Forming positioning block; 510-Forming hole; 520-Insert hole; 600-Slider; 610-Insert protrusion; 700-Upper cover plate; 710-Feed inlet; 720-Guide hole; 800-Guide post; 900-Forming ceramic core. Detailed Implementation

[0048] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, 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. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0049] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0050] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0051] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this invention is in use. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention. In addition, the terms "first," "second," "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0052] Furthermore, terms such as "horizontal," "vertical," and "sag" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0053] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0054] The following detailed description of some embodiments of the present invention is provided in conjunction with the accompanying drawings. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0055] In the existing mold, the ceramic core slurry is injected into the mold through the feed port 710 at the top of the mold. After the ceramic core is formed, the upper template 100 is removed to take out the ceramic core. However, if the mold is deviated during the removal process, it is easy to cause scratches to the ceramic core when it is removed from the mold, which will affect its use. This requires high skills from the operators.

[0056] In view of this, such as Figure 1 , Figure 9 As shown, the conical ceramic core mold provided in this embodiment includes: an upper template 100, a lower template 200, a movable block 300, and an ejection mechanism 400; a forming cavity is formed between the upper template 100 and the lower template 200; the upper template 100 has a through hole 140; the bottom of the movable block 300 has a conical inclined surface 310; the movable block 300 extends into the forming cavity through the through hole 140; the conical inclined surface 310 is located in the forming cavity to form a conical ceramic core in the forming cavity; the end of the ejection mechanism 400 extends into the forming cavity through the lower template 200; the ejection mechanism 400 is configured to drive the formed conical ceramic core to move vertically along its own axis.

[0057] The conical ceramic core mold provided in this embodiment extends a movable block 300 with a conical inclined surface 310 at the bottom through a through hole 140 on the upper template 100 into the molding cavity, so that a conical ceramic core is formed in the molding cavity. After the ceramic core is formed, the movable block 300 is first removed from the through hole 140. Due to the setting of the through hole 140, it plays a guiding role, and the movable block 300 can only be removed in the vertical direction. Then, the upper template 100 is removed, and the ejection mechanism 400 is used to drive the conical ceramic core to move vertically along its own axis. This effectively avoids the surface of the formed conical ceramic core being scratched when it is removed, and the operation is simpler. It alleviates the technical problems of existing ceramic core molds, such as difficulty in removing the mold, easy scratching of the ceramic core during demolding, affecting use, and high skill requirements for operators.

[0058] Regarding the structure and shape of the ejector mechanism 400, specifically:

[0059] like Figure 2 As shown, the ejection mechanism 400 includes an ejection cylinder 410, a rotating shaft 420, and a pull rod handle 430. The ejection cylinder 410 is located above the rotating shaft 420. Two connecting bolts are installed at the bottom of the ejection cylinder 410, and the ends of the connecting bolts abut against the rotating shaft 420. The outer surface of the middle part of the rotating shaft 420 is semi-circular, forming a flat surface 421 and an arc surface 422. During the core molding process, the ejection cylinder 410 is in a stationary state, and the ends of the connecting bolts are in contact with the flat surface 421. 1. When mold opening is required, the operator drives the pull rod handle 430 to rotate, and the rotating shaft 420 connected to the pull rod handle 430 rotates. The end face of the connecting bolt abuts against the arc surface 422. The rotation of the arc surface 422 drives the ejector cylinder 410 to move upward. The end face of the ejector cylinder 410 contacts the molded ceramic core 900, driving the molded ceramic core 900 to move vertically along its own axis, thus ejecting the molded ceramic core 900. The operation is simple and effectively avoids scratches on the surface of the molded ceramic core 900.

[0060] In addition, in order to facilitate the guiding installation of the movable block 300, a conical groove 411 is provided on the top surface of the ejector cylinder 410. The groove wall of the conical groove 411 is inclined, and the conical protrusion 330 at the end of the movable block 300 extends into the conical groove 411.

[0061] To securely support the rotating shaft 420, a lower base is installed at the bottom of the lower template 200. A rotating hole is provided on the side wall of the lower base. The rotating shaft 420 passes through the rotating hole, and one end of the rotating shaft 420 that extends out of the rotating hole is connected to the pull rod handle 430, so that the rotating shaft 420 can rotate freely in the rotating hole.

[0062] Regarding the structure and shape of the upper template 100, specifically:

[0063] like Figure 7 , Figure 8 As shown, the upper template 100 covers the lower template 200. A through hole 140 is provided at the center of the upper template 100. The top of the movable block 300 passes through the through hole 140. The top of the upper template 100 has a relief groove 120, which communicates with the through hole 140. The relief groove 120 allows the top of the movable block 300 to be exposed, making it easy for the operator to remove the movable block 300. A snap-fit ​​groove 110 is provided on the side of the upper template 100 facing the lower template 200. The groove wall of the snap-fit ​​groove 110 can abut against the slider 600, restricting the movement of the slider 600, thereby limiting the range of movement of the slider 600 and preventing the slider 600 from falling off the lower template 200.

[0064] The side wall of the through hole 140 on the upper template 100 is provided with a feeding hole. The wall of the feeding hole and the outer wall of the movable block 300 form a feeding channel 130. The wax material enters from the feeding port 710 and enters the molding cavity along the feeding channel 130.

[0065] Regarding the structure and shape of the lower template 200, specifically:

[0066] like Figure 3 , Figure 5As shown, a forming groove 210 is provided in the middle of the lower template 200. A forming positioning block 500 is installed in the forming groove 210. The top surface of the lower template 200 has multiple sliding grooves 220, all of which face the center of the lower template 200. A slider 600 is provided in each sliding groove 220. The sliding groove 220 provides a sliding path for the slider 600, allowing the slider 600 to move within the sliding groove 220. In order to limit the range of movement of the slider 600, a stop block 230 is fixedly installed on the lower template 200. The stop block 230 is annular. The top of the slider 600 has a protrusion that can contact the inner wall of the stop block 230, preventing the slider 600 from moving further and effectively preventing the slider 600 from coming out of the sliding groove 220.

[0067] To facilitate the ejector cylinder 410's insertion into the molding cavity, a central hole is provided at the center of the lower template 200, and the top end of the ejector cylinder 410 passes through the central hole and extends into the molding positioning block 500.

[0068] Regarding the structure and shape of active block 300, specifically:

[0069] like Figure 6 As shown, the movable block 300 is an integrally molded structure. The outer diameter of the movable block 300 gradually decreases from top to bottom. A conical inclined surface 310 is formed in the lower half of the movable block 300. The gap between the conical inclined surface 310 and the molding positioning block 500 is the molding cavity. The molding ceramic core 900 is formed in the molding cavity to form a conical ceramic core.

[0070] The outer wall of the movable block 300 near the top has a take-out groove 320. There are two take-out grooves 320, which are symmetrically arranged along the axis of the movable block 300. The take-out grooves 320 are designed to facilitate the operator to hold the movable block 300 and pull it out from the upper template 100.

[0071] The bottom of the movable block 300 has a conical protrusion 330, which corresponds to the conical groove 411 opened on the top of the ejector cylinder 410. During installation, the movable block 300 is installed facing the ejector cylinder 410, and the conical protrusion 330 extends into the conical groove 411.

[0072] Regarding the structure and shape of the molding positioning block 500, specifically:

[0073] like Figure 4 As shown, the forming positioning block 500 is located in the forming groove 210 on the lower template 200. The forming hole 510 is opened at the middle position of the forming positioning block 500. The top of the ejector cylinder 410 extends into the forming hole 510, forming a forming cavity between the hole wall of the forming hole 510 and the outer wall of the movable block 300.

[0074] The side wall of the molding positioning block 500 is provided with multiple insertion holes 520 corresponding to the slider 600. The insertion protrusion 610 at the end of the slider 600 passes through the insertion hole 520 and extends into the molding hole 510, restricting the movement of the slider 600. The setting of the insertion protrusion 610 makes the molding ceramic core 900 have a through hole with the same shape as the insertion protrusion 610 after molding.

[0075] Regarding the structure and shape of the top cover 700, specifically:

[0076] The upper cover plate 700 is placed on the upper template 100. The bottom of the upper cover plate 700 has a semi-circular groove, and the top of the upper template 100 has a semi-circular groove. The two semi-circular grooves form a horizontally oriented feed inlet 710. The feed inlet 710 is conical. The injection nozzle of the press is a horizontally extending round tube with a conical end. The two can be directly fitted together without any additional connection method. The mold can also be placed directly on the press and automatically locked and fixed by the press, saving time and manpower.

[0077] To enable the upper cover plate 700 to move vertically, guide pillars 800 are installed on the upper mold plate 100. Multiple guide pillars 800 can be installed, and guide holes 720 are provided on the upper cover plate 700. The guide pillars 800 extend into the guide holes 720 and play a positioning and guiding role. During demolding, the upper cover plate 700 will not scrape against the wax material located in the feed channel 130. Furthermore, the top of the guide pillar 800 is conical, which facilitates the installation and removal of the upper mold plate 100 and the upper cover plate 700.

[0078] In this embodiment, the conical ceramic core mold is removed by first removing the upper cover plate 700, then removing the movable block 300. The through hole 140 on the upper mold plate is used as a guide for the movable block 300 to prevent the movable block 300 from scratching the inner wall of the ceramic core during removal. Then, the upper template 100 is removed, and the twelve sliders 600 are pulled outward to the designated position. Finally, the pull rod handle 430 drives the rotating shaft 420 to rotate, which in turn drives the ejector cylinder 410 to move, ejecting the ceramic core and removing it.

[0079] It is important to note that the contact surfaces of each component are mating surfaces. These mating surfaces are not perfectly "seamless," meaning there is a slight distance between the two contacting surfaces. This distance is called the mating dimension. If the mating dimension is too large, the fit is too loose, which can cause liquid slurry to seep into the gaps and cause "material leakage." If the mating dimension is too small, the slider 600 will not be able to slide. Only when the mating dimension is within a reasonable range can the mold be used normally. Therefore, the distance between the movable block 300 and the hole wall of the through hole 140 is 0.02-0.04mm, the distance between the groove wall of the snap-fit ​​groove 110 and the slider 600 is 0.1-0.15mm, the distance between the sliding protrusion and the hole wall of the insertion hole 520 is 0.02-0.03mm, the distance between the conical protrusion 330 and the groove wall of the conical groove 411 is 0.1-0.15mm, and the distance between the ejector cylinder 410 and the hole wall of the center hole is 0.02-0.04mm.

[0080] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A conical ceramic core mold, characterized in that, include: Upper template (100), lower template (200), movable block (300) and ejection mechanism (400); A molding cavity is formed between the upper template (100) and the lower template (200). The upper template (100) has a through hole (140). The bottom of the movable block (300) has a conical inclined surface (310). The movable block (300) extends into the molding cavity through the through hole (140). The conical inclined surface (310) is located in the molding cavity to form a conical ceramic core in the molding cavity. The end of the ejection mechanism (400) extends through the lower template (200) into the molding cavity. The ejection mechanism (400) is configured to drive the molded conical ceramic core to move vertically along its own axis. The conical ceramic core mold also includes a molding positioning block (500). The lower template (200) is provided with a forming groove (210), the forming positioning block (500) is disposed in the forming groove (210), and the top of the forming positioning block (500) abuts against the upper template (100). The forming positioning block (500) has a forming hole (510), the movable block (300) extends into the forming hole (510), and the conical ceramic core is formed in the cavity between the outer wall of the movable block (300) and the inner wall of the forming positioning block (500). The conical ceramic core mold also includes a slider (600). The lower template (200) is provided with a plurality of sliding grooves (220), the axes of the plurality of sliding grooves (220) are all oriented toward the axis of the lower template (200), and each sliding groove (220) is provided with a slider (600), the slider (600) sliding in the sliding groove (220); The sidewall of the molding positioning block (500) is provided with a plurality of insertion holes (520), and the slider (600) has an insertion protrusion (610) on the side facing the molding positioning block (500). The insertion protrusion (610) extends into the molding cavity through the insertion hole (520).

2. The conical ceramic core mold according to claim 1, characterized in that, The ejection mechanism (400) includes an ejection cylinder (410), a rotating shaft (420), and a lever handle (430). The end of the ejector cylinder (410) has a conical groove (411), and the end of the movable block (300) has a conical protrusion (330), which can extend into the conical groove (411). The end of the ejector cylinder (410) away from the movable block (300) abuts against the rotating shaft (420), and the rotating shaft (420) is configured to drive the ejector cylinder (410) to move along its own axis when rotating; The end of the rotating shaft (420) is connected to the lever handle (430), and the lever handle (430) is used to drive the rotating shaft (420) to rotate.

3. The conical ceramic core mold according to claim 2, characterized in that, The rotating shaft (420) has a flat surface (421) and an arc surface (422) on its side. In a stationary state, the ejector cylinder (410) abuts against the flat surface (421). In an ejected state, the rotating shaft (420) rotates, and the arc surface (422) abuts against the ejector cylinder (410). The rotation of the arc surface (422) drives the ejector cylinder (410) to move.

4. The conical ceramic core mold according to claim 1, characterized in that, The lower template is provided with a stop (230), which is used to limit the movement range of the slider (600).

5. The conical ceramic core mold according to claim 4, characterized in that, The upper template (100) is provided with a snap-fit ​​groove (110) on the side facing the lower template (200), and the top of the slider (600) extends into the snap-fit ​​groove (110).

6. The conical ceramic core mold according to claim 1, characterized in that, The top of the upper template (100) has a relief groove (120), which is connected to the through hole (140). The outer circumferential surface of the movable block (300) is recessed inward to form a take-out groove (320), and the horizontal position of the take-out groove (320) is higher than the bottom of the relief groove (120).

7. The conical ceramic core mold according to claim 1, characterized in that, The conical ceramic core mold also includes an upper cover plate (700). The upper cover plate (700) is placed on the upper template (100), and a feed inlet (710) is formed between the upper cover plate (700) and the upper template (100). The feed end of the feed inlet (710) is set in a conical shape. The upper template (100) has a feeding channel (130) arranged in a vertical direction, and the feeding channel (130) is connected to the feeding port (710) and the forming cavity respectively.

8. The conical ceramic core mold according to claim 7, characterized in that, The conical ceramic core mold also includes a guide post (800). The guide post (800) is installed on the top of the upper template (100), and the upper cover plate (700) has a guide hole (720). The guide post (800) passes through the guide hole (720) so that the guide post (800) restricts the removal direction of the upper cover plate (700).

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