A gold mold grouting device

Abstract

The application provides a gold mold ash pouring device, which comprises a main body, a cover body, a vacuum assembly and a sealing connecting piece. The cover body is arranged on the main body, and the cover body and the main body form a containing cavity for placing gypsum needing defoaming. The vacuum assembly is connected with the cover body at one end away from the containing cavity, penetrates through the cover body and extends into the containing cavity. The sealing connecting piece is integrally formed on the cover body, and the sealing connecting piece is provided with an airtight cavity. The vacuum assembly penetrates through the airtight cavity and is connected with the airtight cavity in a fit manner, and the airtight cavity and the vacuum assembly are connected in a suction manner. The sealing property is improved through the above structure.

Description

Technical Field

[0001] This application relates to the field of gold jewelry component manufacturing, and in particular to a gold mold filling device. Background Technology

[0002] In the lost-wax casting process for gold jewelry, the plaster filling device is the core equipment to ensure high-quality shaping. By pouring plaster slurry into the sleeve surrounding the wax model in a vacuum environment, air bubbles are completely eliminated, allowing the plaster mold to accurately replicate the fine textures and complex structures of the wax model. This step directly determines the surface finish, detail reproduction, and yield rate of the jewelry during subsequent gold melting and casting.

[0003] In existing technologies, traditional ash-filling devices are prone to micro-leakage at the vacuum interface, resulting in insufficient vacuum and incomplete removal of air bubbles. The unremoved air bubbles will solidify in the plaster mold. When pouring gold, the high-temperature molten metal occupies the space of the air bubbles, and after cooling, it forms pits on the surface of the casting or internal holes.

[0004] Therefore, a gold mold filling device with improved sealing is needed. Utility Model Content

[0005] In view of this, it is necessary to provide a gold mold filling device with improved sealing performance to solve the above problems.

[0006] Embodiments of this application provide a gold mold filling device, comprising:

[0007] main body;

[0008] A cover body is disposed on the main body and forms a receiving cavity with the main body for placing plaster that needs to be defoamed; the cover body includes an integrally formed connecting port.

[0009] A vacuum assembly is located at one end opposite to the receiving cavity, is fitted and connected to the cover, passes through the cover, and extends into the receiving cavity;

[0010] A sealing connector passes through the connection port and fits against the connection port to form an airtight cavity. The vacuum assembly passes through the airtight cavity and fits against the airtight cavity, and the airtight cavity is adsorbed and connected to the vacuum assembly.

[0011] In at least one embodiment of this application, the vacuum assembly includes:

[0012] A vacuum pump is used to create a vacuum.

[0013] A vacuum tube, one end of which is connected to the vacuum pump, and the other end of which passes through the main body and extends into the receiving cavity.

[0014] In at least one embodiment of this application, the vacuum tube includes a rubber protrusion sleeved on the vacuum tube and fitted to the airtight cavity. The airtight cavity has a snap-fit ​​groove that matches the rubber protrusion. The rubber protrusion is located in the snap-fit ​​groove and is adsorbedly connected to the snap-fit ​​groove. The airtight cavity encloses the rubber protrusion.

[0015] In at least one embodiment of this application, the gold mold filling device includes a pressure gauge for monitoring the negative pressure state within the receiving cavity.

[0016] In at least one embodiment of this application, the gold mold filling device includes a seal formed in the cover, the seal being located at the connection between the cover and the main body.

[0017] In at least one embodiment of this application, the gold mold filling device is provided with an observation window, which is located on the cover.

[0018] In at least one embodiment of this application, the cover is configured as a dome structure.

[0019] In at least one embodiment of this application, the gold mold filling device includes at least one of the aforementioned vacuum components.

[0020] In at least one embodiment of this application, a plurality of the vacuum components are equally disposed on the cover.

[0021] In at least one embodiment of this application, a plurality of the vacuum components are equally arranged along the circumference of the cover.

[0022] The gold mold filling device provided above forms a primary airtight cavity by fitting the sealing connector with the connection port. The vacuum component then fits into the airtight cavity a second time. Specifically, when the vacuum component is running, the negative pressure causes the sealing surface of the adsorption connection to be automatically pressed, forming a self-reinforcing seal. Attached Figure Description

[0023] Figure 1 This is a perspective view of the gold mold filling device described in this application;

[0024] Figure 2 This is a front view of the gold mold filling device described in this application;

[0025] Figure 3 This is an exploded view of the gold mold filling device described in this application;

[0026] Figure 4 for Figure 3 A magnified view of a section at point A in the middle;

[0027] Figure 5This is a schematic diagram of the structure of the gold mold filling device described in this application, which has multiple vacuum components;

[0028] Explanation of main component symbols

[0029] 100. Gold mold filling device; 10. Main body; 20. Cover; 21. Connection port; 11. Receiving cavity; 30. Vacuum assembly; 40. Sealing connector; 41. Airtight cavity; 42. Snap-fit ​​groove; 31. Vacuum pump; 32. Vacuum tube; 33. Rubber protrusion; 50. Pressure gauge; 60. Seal; 70. Observation window; Detailed Implementation

[0030] The embodiments of this application will now be described with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments.

[0031] It should be noted that when a component is considered to be "connected" to another component, it can be directly connected to the other component or may also have an intervening component. When a component is considered to be "placed" on another component, it can be directly placed on the other component or may also have an intervening component. The terms "top," "bottom," "upper," "lower," "left," "right," "front," "back," and similar expressions used in this article are for illustrative purposes only.

[0032] This application provides a gold mold plaster filling device, comprising: a main body, a cover, a vacuum assembly, and a sealing connector. The cover is disposed on the main body, and the cover and the main body form a cavity for holding plaster that needs to be defoamed. The vacuum assembly is located at one end opposite to the cavity and is fitted and connected to the cover, passing through the cover and extending into the cavity. The sealing connector is integrally formed on the cover, and the sealing connector has an airtight cavity. The vacuum assembly passes through the airtight cavity and is fitted and connected to the airtight cavity, and the airtight cavity is adsorbed and connected to the vacuum assembly.

[0033] The gold mold filling device provided above forms a primary airtight cavity by fitting the sealing connector with the connection port. The vacuum component then fits into the airtight cavity a second time. Specifically, when the vacuum component is running, the negative pressure causes the sealing surface of the adsorption connection to be automatically pressed, forming a self-reinforcing seal.

[0034] The following detailed description of some embodiments of this application is provided in conjunction with the accompanying drawings. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0035] Please see Figures 1-5This application provides a gold mold plaster filling device 100, comprising: a main body 10, a cover 20, a vacuum assembly 30, and a sealing connector 40. The cover 20 covers the main body 10, and the cover 20 and the main body 10 form a receiving cavity 11 for placing plaster that needs to be defoamed. The vacuum assembly 30 is located at one end opposite to the receiving cavity 11 and is fitted and connected to the cover 20. The vacuum assembly 30 passes through the cover 20 and extends into the receiving cavity 11. The sealing connector 40 is integrally formed on the cover 20, and the sealing connector 40 has an airtight cavity 41. The vacuum assembly 30 passes through the airtight cavity 41 and is fitted and connected to the airtight cavity 41, and the airtight cavity 41 is adsorbed and connected to the vacuum assembly 30.

[0036] Specifically, the main body 10 is a rigid container, preferably made of stainless steel or aluminum alloy, with an anti-corrosion coating sprayed on the inner surface, used to contain gypsum slurry and withstand negative pressure. It has a circular opening at its upper end for installing the cover 20.

[0037] The cover 20 is placed on top of the main body 10, forming a sealed cavity 11. The cavity 11 is used to hold the plaster slurry for making wax models. The cover 20 is preferably made of transparent, pressure-resistant acrylic or polycarbonate material. The cover 20 has a dome structure with a hemispherical inner surface. This dome structure facilitates the upward concentration of air bubbles, promotes vacuum degassing, and enhances the compressive strength of the cover 20, making it suitable for high vacuum environments. The top surface of the cover 20 has an integrally formed connection port 21 for installing a sealed connection structure for the vacuum assembly 30.

[0038] The vacuum assembly 30 includes a vacuum pump 31 and a vacuum tube 32. The vacuum pump 31 can be a rotary vane vacuum pump with a rated pumping speed of 2 L / s or higher, which can pump the containment cavity 11 to ≤0.1 mbar within 2 minutes.

[0039] The vacuum tube 32 can be made of a high-elasticity silicone tube resistant to negative pressure. One end is connected to the vacuum pump 31, and the other end passes through the connection port 21 and extends into the receiving cavity 11.

[0040] A sealing connector 40 is used to pass through the connection port 21 and fit against it to form a closed space, i.e., an airtight cavity 41. The sealing connector 40 consists of inner and outer tubes. The outer tube is fixed to the inner wall of the connection port 21 and fits against it circumferentially. The inner tube engages with the snap-fit ​​groove 42 on the inner wall of the airtight cavity 41 via a rubber protrusion 33. A vacuum tube 32 passes through the inner tube and achieves an adsorption connection via the rubber protrusion 33 and the snap-fit ​​groove 42.

[0041] The sealing element 60 is an annular sealing ring provided at the connection between the cover 20 and the main body 10. The sealing element 60 is preferably an O-ring silicone sealing ring with a temperature resistance of up to 200℃. A sealing ring groove is provided on the bottom surface of the cover 20 to fix the sealing ring. When the cover is closed, a circumferential seal is formed, further ensuring the overall airtightness of the receiving cavity 11.

[0042] Pressure gauge 50 is installed on the top of cover 20. Pressure gauge 50 is used to monitor the vacuum level in the containment cavity 11 in real time. Its range is 0 to -1 bar and its accuracy is 0.01 bar. Vacuum pump 31 can reach -0.098 bar after working for 2 minutes, which meets the requirements of the casting process.

[0043] To further improve the vacuum sealing effect and prevent leakage at the vacuum interface, in this embodiment, the vacuum tube 32 of the vacuum assembly 30, while passing through the cover 20 and extending into the receiving cavity 11, has a rubber protrusion 33 on its outer wall, which is sleeved on the outside of the vacuum tube 32.

[0044] The cover 20 has an integrally formed connection port 21 with an airtight cavity 41 inside. The airtight cavity 41 is a recessed structure with an annular snap-fit ​​groove 42 on its inner surface. The rubber protrusion 33 matches the shape and size of the snap-fit ​​groove 42.

[0045] The rubber protrusion 33 is a raised annular sealing rib with an outer diameter slightly larger than the inner diameter of the snap-fit ​​groove 42. The preferred material is silicone rubber with a Shore hardness of 30-50. The snap-fit ​​groove 42 is an annular groove on the inner wall of the cover 20, with a groove depth of about 1.0 mm and a width similar to that of the rubber protrusion 33.

[0046] During installation, the operator inserts the vacuum tube 32 into the connector 21 from the outside. The rubber protrusion 33 slides into the snap-fit ​​groove 42 along the insertion direction. During this process, due to the elastic deformation of the rubber, the protrusion generates a certain reverse restoring force after being pressed in, thereby tightly fitting with the inner wall of the snap-fit ​​groove 42 to form a primary static seal.

[0047] When the vacuum pump 31 operates and evacuates air, a negative pressure is formed inside the airtight cavity 41. The atmospheric pressure outside the cavity acts on the outer surface of the rubber protrusion 33, causing it to expand and adhere further into the snap-fit ​​groove 42, thus forming a negative pressure-driven adsorption connection structure. This structure enhances the sealing performance under vacuum conditions, avoiding leakage caused by deformation of traditional threaded or adhesive interfaces due to negative pressure.

[0048] In addition, the airtight cavity 41 completely encloses the rubber protrusion 33, that is, the rubber protrusion 33 is completely located in the sealing cavity structure inside the cover 20, thereby effectively isolating the outside air from entering the joint position, and providing compression protection during vacuuming to avoid air leakage caused by aging or misalignment of the protrusion.

[0049] When the transparent cover 20 is not used, a transparent window area is opened in the middle of the cover 20 to visually monitor the flow status of the gypsum slurry and the effect of air bubble removal.

[0050] The gold mold filling device 100 is provided with at least one vacuum component 30. The vacuum component 30 includes a vacuum pump 31, a vacuum tube 32, and a sealing connection structure located at the connection port 21 of the cover 20. One end of the vacuum component 30 is connected to the vacuum pump 31, and the other end passes through the cover 20 and extends into the receiving cavity 11 to perform a vacuuming operation inside the receiving cavity 11, thereby expelling air bubbles from the gypsum slurry.

[0051] Three vacuum components 30 are evenly spaced circumferentially around the cover 20, each spaced 120° apart. This structure helps avoid vacuum dead zones caused by single-point pumping, ensuring uniform pressure on the slurry surface, allowing air bubbles in different locations to be extracted, thereby improving the consistency of the casting.

[0052] In another embodiment, multiple vacuum components 30 are arranged side-by-side on one side or the top of the cover 20 in the same plane. This arrangement is compact and suitable for symmetrical or small-to-medium-sized mold structures. It facilitates centralized wiring and maintenance of the vacuum tubes 32, and allows for flexible setting of evacuation points according to the mold volume and plaster flow path, further improving evacuation efficiency. Multiple side-by-side vacuum components 30 can be connected in parallel to a single vacuum pump 31, or multiple vacuum pumps 31 can be connected separately according to system accuracy requirements.

[0053] The defoaming process of the gypsum slurry is as follows: The gypsum slurry is poured into the receiving cavity 11 by opening the cover 20; the cover 20 is then closed to the main body 10 using a locking mechanism, and sealed by the sealing element 60 between the main body 10 and the cover 20. Then, the vacuum pump 31 is started, and negative pressure is applied to the receiving cavity 11 through the vacuum tube 32. The bubbles in the gypsum slurry are gradually enlarged and accumulate above the dome. Air is then introduced through the vacuum port, and the air breaks up the bubbles.

[0054] The vacuum ports are located on the top or side of the cover 20, and are integrally injection molded or machined. Multiple vacuum ports can be distributed circumferentially or arranged side by side, and each vacuum port is independently connected to a vacuum tube 32.

[0055] The locking element is preferably a multi-point snap-fit ​​structure with equal perimeter arrangement. Each snap-fit ​​includes a fixed buckle installed on the outer edge of the main body 10, a movable hook pressing handle or a rotating pull rod hinged to the edge of the cover 20, for manual locking or releasing.

[0056] If the cover 20 is made of opaque material, a transparent observation window 70 can be opened at the dome position for manual observation of the injection status and to determine whether the air bubbles have been completely removed.

[0057] Therefore, the gold mold filling device 100 provided above forms a primary sealed airtight cavity 41 by fitting the sealing connector 40 with the connection port 21. The vacuum component 30 then fits into the airtight cavity 41 a second time. Specifically, when the vacuum component 30 is running, the negative pressure causes the sealing surface of the adsorption connection to be automatically pressed, forming a self-reinforcing seal.

[0058] The above description is merely an embodiment of this application. It should be noted that those skilled in the art can make improvements without departing from the inventive concept of this application, but these improvements all fall within the protection scope of this application.

Claims

1. A gold mold ash-filling device, characterized in that, include: main body; A cover body is disposed on the main body and forms a receiving cavity with the main body for placing plaster that needs to be defoamed; the cover body includes an integrally formed connecting port. A vacuum assembly is located at one end opposite to the receiving cavity, is fitted and connected to the cover, passes through the cover, and extends into the receiving cavity; A sealing connector passes through the connection port and fits against the connection port to form an airtight cavity. The vacuum assembly passes through the airtight cavity and fits against the airtight cavity, and the airtight cavity is adsorbed and connected to the vacuum assembly.

2. The gold mold ash-filling device according to claim 1, characterized in that, The vacuum assembly includes: A vacuum pump is used to create a vacuum. A vacuum tube, one end of which is connected to the vacuum pump, and the other end of which passes through the main body and extends into the receiving cavity.

3. The gold mold ash-filling device according to claim 2, characterized in that, The vacuum tube includes a rubber protrusion sleeved on the vacuum tube and fitted to the airtight cavity. The airtight cavity has a snap-fit ​​groove that matches the rubber protrusion. The rubber protrusion is located in the snap-fit ​​groove and is adsorbed and connected to the snap-fit ​​groove. The airtight cavity encloses the rubber protrusion.

4. The gold mold ash-filling device according to claim 1, characterized in that, The gold mold filling device includes a pressure gauge for monitoring the negative pressure state within the receiving cavity.

5. The gold mold ash-filling device according to claim 1, characterized in that, The gold mold filling device includes a sealing element formed in the cover, which is located at the connection between the cover and the main body.

6. The gold mold ash-filling device according to claim 1, characterized in that, The gold mold filling device has an observation window, which is located on the cover.

7. The gold mold ash-filling device according to claim 1, characterized in that, The cover is designed as a dome structure.

8. The gold mold ash-filling device according to claim 1, characterized in that, The gold mold filling device includes at least one of the aforementioned vacuum components.

9. A gold mold ash-filling device according to claim 1, characterized in that, Multiple vacuum components are equally disposed on the cover.

10. A gold mold ash-filling device according to claim 1, characterized in that, The multiple vacuum components are evenly arranged along the circumference of the cover.

Images