Sand shooting nozzle of precoated sand mold
By designing water-cooled cooling components in the sand injection nozzle, the problem of sand core generation at the sand injection nozzle assembly is solved, and the production cycle is shortened and the cost is reduced, the amount of coated sand is reduced, and solid waste is reduced.
Patent Information
- Application Number
- CN202422224806.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-11
- Publication Date
- 2025-07-22
- Estimated Expiration
- 2034-09-11
AI Technical Summary
In the prior art, the sand nozzle assembly will produce sand cores of sand in the sand nozzle assembly, resulting in problems of long production cycles and high production costs.
A sand injection nozzle of a coated sand mold is designed, including a sand injection base, a sand injection nozzle body and a water-cooled cooling assembly. By opening grooves at the corresponding positions of the sand injection base and the sand injection nozzle body and installing cooling components, a cooling water channel is formed using the water inlet pipe and the water outlet pipe to ensure that the sand injection nozzle body maintains a normal temperature and avoiding the curing sand from coating.
There is no need to remove the sand core of the sand nozzle, shorten the production cycle, save the amount of coated sand, reduce production costs, and reduce solid waste generation.
Smart Images
Figure CN223129287U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a sand shooting nozzle for a coated sand mold, belonging to the technical field of sand casting. Background Art
[0002] The working principle of sand shooting molding is to shoot a mixture of coated sand with liquid or solid thermosetting resin as a binder into the cavity of a coated sand mold through the sand shooting nozzle assembly of a sand shooting device. After the sand mold is quickly preheated in the mold cavity and hardened to a certain thickness, it is taken out to form a high-quality sand mold product with a smooth surface and accurate dimensions.
[0003] Coated sand belongs to a thermoformed sand mold. During the production process, it is necessary to wait for the coated sand to be completely cured in the mold to form a complete sand mold / core and then take it out of the mold. During the process of taking out the mold / core, for the coated sand mold / core made by a conventional sand shooting nozzle assembly, there is still coated sand left inside the sand shooting nozzle, which will be cured together with the sand mold / core and connected as a whole. Therefore, when taking out the sand mold product, the sand shooting nozzle and the sand mold / core will be taken out together. It is necessary to clean the sand shooting nozzle and the remaining sand core inside before using the sand mold / core. Therefore, the sand shooting nozzle sand core belongs to a processed waste sand core. This leads to the existing sand shooting molding production process that requires removing the sand shooting nozzle sand core, which not only increases the production cycle but also wastes coated sand and increases the production cost. Therefore, a sand shooting nozzle for a coated sand mold is needed to solve the problem that a sand shooting nozzle sand core will be generated at the position of the sand shooting nozzle assembly during sand shooting molding in the prior art, resulting in a long production cycle and high production cost. Summary of the Utility Model
[0004] The purpose of the utility model is to provide a sand shooting nozzle for a coated sand mold to solve the problems put forward in the above background art.
[0005] To achieve the above purpose, the utility model provides the following technical solution: A sand shooting nozzle for a coated sand mold includes a sand shooting seat, a sand shooting nozzle body, and a cooling component. The sand shooting seat is provided with an installation hole, the sand shooting nozzle body is installed through the installation hole, and one end of it extends to the outside of the sand shooting seat to form a sand shooting end; the sand shooting seat is installed on the coated sand mold, and the sand shooting end is installed in the sand shooting hole of the coated sand mold; a first groove is opened at a position corresponding to the sand shooting nozzle body on the sand shooting seat, and the cooling component is installed in the first groove for cooling and temperature reduction of the sand shooting nozzle body.
[0006] Specifically, the seat body of the sand shooting seat located above the first groove is provided with a second groove to form a sand accumulation groove; a first through hole communicating with each other is provided between the first groove and the second groove, that is, to form the installation hole, and a second through hole is opened at a position corresponding to the first groove and the installation hole; one end of the sand shooting nozzle body is fixedly installed in the first through hole, and its sand shooting end extends to the outside of the sand shooting seat through the second through hole.
[0007] Specifically, the cooling component is a water-cooled cooling component, which includes a water inlet pipe and a water outlet pipe; through holes are respectively formed on the sand shooting seats on both sides of the first groove, and the through holes on both sides are concentrically arranged. The water inlet pipe and the water outlet pipe are respectively installed in the through holes on both sides, and the first groove between the water inlet pipe and the water outlet pipe forms a cooling water channel.
[0008] Specifically, the cooling component is further provided with an external water circulation pipe; the external water circulation pipe is sleeved outside the sand shooting nozzle body, and one end of it is fixedly installed in the second through hole, and the other end extends to the sand shooting end of the sand shooting nozzle body to form an extended end; a sealing component is arranged between the extended end and the sand shooting end.
[0009] Specifically, the aperture of the second through hole is larger than that of the first through hole; when the external water circulation pipe is sleeved outside the sand shooting nozzle body, an installation gap is left between the two to form a secondary cooling water channel.
[0010] Specifically, a high-temperature resistant sealing gasket is sleeved at the position where the outside of the external water circulation pipe is connected to the sand shooting seat.
[0011] Specifically, the sealing component includes a high-temperature resistant sealing gasket and a sand shooting nut; the extended end of the external water circulation pipe and the sand shooting end of the sand shooting nozzle body are flush. The sand shooting nut is connected to the extended end of the external water circulation pipe, and an installation groove is arranged between the two. The high-temperature resistant sealing gasket is installed in the installation groove, and the extended end of the external water circulation pipe and the sand shooting end of the sand shooting nozzle body abut against the high-temperature resistant sealing gasket; a sand shooting through groove that opens during sand shooting is formed at the position of the high-temperature resistant sealing gasket corresponding to the sand shooting port of the sand shooting end, and a sand shooting channel communicated with the sand shooting port is arranged inside the sand shooting nut.
[0012] Specifically, the end of the extended end of the external water circulation pipe is recessed inward to form a stepped structure, and the pipe body in the small step area abuts against the sand shooting end of the sand shooting nozzle body and is flush with the sand shooting end. External threads are formed on the outer side of the pipe body in the large step area; a threaded groove is formed at one end of the sand shooting nut facing the sand shooting nozzle body; internal threads are arranged on the groove wall of the threaded groove, and the sand shooting nut is threadedly connected to the external threads on the outer side of the extended end of the external water circulation pipe to be connected to the external water circulation pipe, and the high-temperature resistant sealing gasket is installed at the bottom of the threaded groove.
[0013] Specifically, a chamfer structure is arranged on the outer side of the end of the sand shooting nut away from the sand shooting nozzle body to form an insertion part for inserting into the sand shooting hole of the film covering mold.
[0014] Specifically, the sand shooting through groove of the high-temperature resistant sealing gasket is a cross groove structure.
[0015] Compared with the prior art, the beneficial effects of the present utility model are:
[0016] 1. The present application provides a sand shooting seat, a sand shooting nozzle body and a cooling component. The sand shooting nozzle body is installed on the sand shooting seat, and one end thereof extends to the outside of the sand shooting seat to form a sand shooting end. Meanwhile, a first groove is formed at a position corresponding to the sand shooting nozzle body on the sand shooting seat for installing the cooling component, which is used to cool down the sand shooting nozzle body, so that the temperature of the sand shooting nozzle body can be maintained at room temperature during sand shooting molding, preventing the coated sand remaining inside the sand shooting nozzle body from solidifying and forming a sand core in the sand shooting nozzle. There is no need to perform the cleaning process for the sand core in the sand shooting nozzle, shortening the production cycle, reducing the consumption of coated sand, and saving production costs.
[0017] 2. On the basis of the above, the cooling component of the present application is a water-cooled cooling component, which includes a water inlet pipe and a water outlet pipe. Through holes are respectively formed on both sides of the first groove of the sand shooting seat for installing the water inlet pipe and the water outlet pipe, so as to connect an external water circulation device through the water inlet pipe and the water outlet pipe, enabling the first groove to cool down the sand shooting nozzle body through circulating cooling water. The cooling component of the present application has a simple structure and low manufacturing cost.
[0018] 3. On the basis of the above, a second groove is further formed on the sand shooting seat above the first groove for forming a sand accumulation groove. The sand shooting nozzle body is installed in the installation hole of the sand accumulation groove and can move along with the sand shooting seat. During use, the sand shooting seat presses down onto the coated sand mold, and the sand shooting nozzle body inserts into the sand shooting hole of the coated sand mold for sand shooting. After use, the sand shooting seat is removed from the mold, and the sand accumulation groove of the sand shooting seat and the sand shooting nozzle body are continuously cooled down through the cooling component to ensure that the sand in the sand accumulation groove and the sand remaining inside the sand shooting nozzle body are at room temperature and the coated sand does not solidify. This can effectively save the consumption of coated sand, reduce the loss of coated sand during the production process, and reduce the generation of solid waste.
[0019] 4. On the basis of the above, a second through hole is formed at the bottom of the first groove of the sand shooting seat of the present application, and the sand shooting end of the sand shooting nozzle body extends to the outside of the sand shooting seat through the second through hole. A water circulation outer pipe is installed at the second through hole, and the water circulation outer pipe is sleeved outside the sand shooting nozzle body with an installation gap left between them to form a secondary cooling water channel, increasing the cooling area for the sand shooting nozzle body. To improve the sealing performance of the cooling water between the two, a sealing component is provided between them.
[0020] 5. On the basis described above, the sealing assembly of the present application includes a high-temperature resistant sealing gasket and a sand shooting nut. The sand shooting nut is connected to the outer water circulation pipe, and there is a threaded groove between them for installing the high-temperature resistant sealing gasket to achieve water tightness between the outer water circulation pipe and the sand shooting nozzle body. In addition, a chamfer structure is provided on the outer side of the sand shooting nut to form an insertion part of the sand shooting hole inserted into the film covering mold. When installed on the film covering sand mold, the sand shooting nut is convenient to insert into the sand shooting hole, and a high-temperature resistant sealing washer is provided on the outer side of the outer water circulation pipe, so that when sand shooting, the sealing performance between the sand shooting seat and the film covering sand mold is good, avoiding sand leakage. Description of the Drawings
[0021] Figure 1 It is a sectional view of the installation structure of the sand shooting nozzle of the film covering sand mold and the film covering sand mold in this embodiment;
[0022] Figure 2 It is a sectional view of the sand shooting seat of the sand shooting nozzle of the film covering sand mold in this embodiment;
[0023] Figure 3 It is a sectional view of the sand shooting nozzle body of the sand shooting nozzle of the film covering sand mold in this embodiment;
[0024] Figure 4 It is a sectional view of the outer water circulation pipe of the sand shooting nozzle of the film covering sand mold in this embodiment;
[0025] Figure 5 It is a sectional view of the sand shooting nut of the sand shooting nozzle of the film covering sand mold in this embodiment;
[0026] Figure 6 It is a schematic structural view of the high-temperature resistant sealing gasket of the sand shooting nozzle of the film covering sand mold in this embodiment. Detailed Embodiment
[0027] In order to make the purpose and advantages of the present utility model clearer, the present utility model will be specifically described below in conjunction with embodiments. It should be understood that the following text is only used to describe one or several specific implementation manners of the present utility model, and does not strictly limit the specific protection scope claimed by the present utility model.
[0028] Please refer to Figures 1-6 , this embodiment discloses a sand shooting nozzle for a film covering sand mold, including a sand shooting seat 1, a sand shooting nozzle body 4 and a cooling assembly. An installation hole is provided on the sand shooting seat, and the sand shooting nozzle body penetrates through and is installed in the installation hole, and one end of it extends to the outside of the sand shooting seat to form a sand shooting end; the sand shooting seat is installed on the film covering sand mold, and the sand shooting end is installed in the sand shooting hole of the film covering sand mold; a first groove 2 is provided at the position of the sand shooting seat corresponding to the sand shooting nozzle body, and the cooling assembly is installed in the first groove for cooling and temperature reduction of the sand shooting nozzle body 4.
[0029] In the sand injection seat 1 of this embodiment, the seat body located on the upper side of the first groove 2 is provided with a second groove 3, forming a sand accumulation groove; a first through hole is provided between the first groove and the second groove, which constitutes an installation hole, also known as the sand inlet 14. A second through hole is opened at a position corresponding to the installation hole in the first groove; one end of the sand injection nozzle body is fixedly installed in the first through hole, and its sand injection end extends to the outside of the sand injection seat through the second through hole.
[0030] Furthermore, the cooling component of this embodiment is a water-cooled cooling component, which includes a water inlet pipe and a water outlet pipe (both shown in the figure); through holes are respectively opened on the sand injection seats on both sides of the first groove to form a water inlet 12 and a water outlet 13, and the through holes on both sides are concentrically arranged. Internal threads are provided in the through holes, and external threads are respectively provided on the outer sides of the water inlet pipe and the water outlet pipe bodies. They are installed in the through holes on both sides by threaded connection, and the first groove between the water inlet pipe and the water outlet pipe constitutes a cooling water channel. And the cooling component of this embodiment is also provided with a water circulation outer pipe 5; the water circulation outer pipe 5 is sleeved outside the sand injection nozzle body 4, and one end of it is fixedly installed in the second through hole, and the other end extends to the sand injection end of the sand injection nozzle body to form an extended end; a sealing component is provided between the extended end and the sand injection end. And the aperture of the second through hole is larger than that of the first through hole; when the water circulation outer pipe is sleeved outside the sand injection nozzle body, an installation gap is left between the two to form a secondary cooling water channel. And the sealing component of this embodiment includes a high-temperature resistant sealing gasket 7 and a sand injection nut 8; the extended end of the water circulation outer pipe 5 is flush with the sand injection end of the sand injection nozzle body, the sand injection nut 8 is connected to the extended end of the water circulation outer pipe 5, and an installation groove is provided between the two. The high-temperature resistant sealing gasket 7 is installed in the installation groove, and the extended end of the water circulation outer pipe and the sand injection end of the sand injection nozzle body abut against the high-temperature resistant sealing gasket; a sand injection through groove 15 that is opened during sand injection is provided at a position corresponding to the sand injection port of the sand injection end on the high-temperature resistant sealing gasket. Among them, the sand injection through groove is a cross groove structure, and the groove width is 1 mm, while the thickness of the high-temperature resistant sealing gasket is 5 mm. A sand injection channel communicating with the sand injection port is provided inside the sand injection nut. In addition, a high-temperature resistant sealing washer 6 is sleeved at the position where the outer side of the water circulation outer pipe of this embodiment is connected to the sand injection seat, and the thickness of the washer is 3 mm. Since the high-temperature resistant sealing gasket of this embodiment is located between the water circulation outer pipe and the sand injection nut, the high temperature resistance of the gasket needs to be higher than 200 °C, while the high-temperature resistant sealing washer is located between the sand injection seat and the coated sand mold. During sand injection, the high temperature resistance of the washer needs to be higher than 300 °C.
[0031] The end of the extended end of the water circulation outer tube of the present embodiment is recessed inward to form a step-like structure, and the tube body in the small step area abuts against the sand shooting end of the sand shooting nozzle body and is flush with the sand shooting end, and an external thread is provided on the outside of the tube body in the large step area; the sand shooting nut faces a threaded groove at one end of the sand shooting nozzle body; the groove wall of the threaded groove is provided with an internal thread, and the sand shooting nut is threadedly connected with the external thread on the outside of the extended end of the water circulation outer tube through the internal thread, and is connected to the water circulation outer tube, and a high-temperature resistant sealing gasket is installed at the bottom of the threaded groove.
[0032] Working principle: The sand shooting seat of the coated sand mold sand shooting nozzle of this embodiment is made of a 40mm thick cast iron plate, with a second groove on the top to form a sand accumulation groove, and a first groove is opened at the radial lower side of the second groove to form a cooling water channel. Through holes are opened on the sand shooting seat on both sides of the cooling water channel for installing water inlet pipes and water outlet pipes. The water inlet pipe, water outlet pipe, sand shooting nozzle body and water circulation outer pipe of this embodiment are all made of 45# round pipes. The components are low in manufacturing cost and long in service life.
[0033] When in use, first connect the water inlet pipe and the water outlet pipe to the external water circulation equipment respectively, and start the water circulation. Then add coated sand into the sand accumulation groove, and connect the sand shooting nozzle body to the sand shooting equipment. When shooting sand, the sand shooting seat is pressed down onto the coated sand sand mold. The coated sand sand mold of this embodiment includes an upper mold 9 and a lower mold 11. After the two are molded together, a mold cavity 10 is formed in the middle. The sand shooting end of the sand shooting nozzle body is inserted into the sand shooting hole of the upper mold plate, and then sand shooting is carried out. When shooting sand, the high temperature resistant sealing gasket in the middle of the sand shooting nozzle body opens the cross groove in the middle of the gasket with the impact force brought by the sand shooting, and sand shooting is carried out. After the sand shooting is completed, the cross groove will be closed with the resilience of the rubber itself to prevent the coated sand from leaking. After the sand shooting is completed, the sand shooting seat is moved out of the upper mold. During this period, the coated sand in the sand accumulation groove and the sand shooting nozzle body is always kept in water circulation cooling to ensure that the coated sand in the sand accumulation groove and the sand shooting nozzle body is at room temperature, so that the coated sand is not solidified. This can effectively save the coated sand, reduce the sand loss of the coated sand in the production process, and reduce the generation of solid waste. After the sand mold product is solidified, the sand core of the sand shooting nozzle will not be generated, and there is no need to carry out the sand core removal process of the sand shooting nozzle, which improves production efficiency.
[0034] The implementation methods of the utility model are described in detail above in conjunction with the embodiments, but the utility model is not limited to the above-mentioned implementation methods. For ordinary technicians in this technical field, after knowing the contents recorded in the utility model, they can make several equivalent changes and substitutions thereto without departing from the principle of the utility model. These equivalent changes and substitutions should also be regarded as belonging to the protection scope of the utility model.
Claims
1. A sand injection nozzle for a coated sand mold, comprising a sand injection base, a sand injection nozzle body and a cooling assembly, characterized in that: The sand shooting base is provided with mounting holes, and the sand shooting nozzle body is inserted through and mounted in the mounting holes, with one end extending to the outside of the sand shooting base to form a sand shooting end; the sand shooting base is mounted on the coated sand mold, and the sand shooting end is mounted in the sand shooting hole of the coated sand mold; a first groove is formed at a position corresponding to the sand shooting nozzle body on the sand shooting base, and the cooling component is mounted in the first groove for cooling the sand shooting nozzle body.
2. The sand injection nozzle of the coated sand mold according to claim 1, characterized in that: The body of the sand shooting base located above the first groove is provided with a second groove to form a sand accumulation groove; a first through hole communicating with each other is provided between the first groove and the second groove, which constitutes the mounting hole, and a second through hole is provided at a position corresponding to the mounting hole in the first groove; one end of the sand shooting nozzle body is fixedly mounted in the first through hole, and its sand shooting end extends to the outside of the sand shooting base through the second through hole.
3. The sand injection nozzle of the coated sand mold according to claim 2, characterized in that: The cooling component is a water-cooled cooling component, which includes a water inlet pipe and a water outlet pipe; through holes are respectively formed on the sand shooting base on both sides of the first groove, and the through holes on both sides are concentrically arranged. The water inlet pipe and the water outlet pipe are respectively mounted in the through holes on both sides, and the first groove between the water inlet pipe and the water outlet pipe constitutes a cooling water channel.
4. The sand injection nozzle of the coated sand mold according to claim 3, characterized in that: The cooling component is further provided with a water circulation outer pipe; the water circulation outer pipe is sleeved outside the sand shooting nozzle body, and one end thereof is fixedly mounted in the second through hole, and the other end extends to the sand shooting end of the sand shooting nozzle body to form an extended end; a sealing component is provided between the extended end and the sand shooting end.
5. The sand injection nozzle of the coated sand mold according to claim 4, characterized in that: The aperture of the second through hole is larger than that of the first through hole; when the water circulation outer pipe is sleeved outside the sand shooting nozzle body, an installation gap is left between the two to form a secondary cooling water channel.
6. The sand injection nozzle of the coated sand mold according to claim 4, characterized in that: A high-temperature resistant sealing washer is sleeved at the position where the outer side of the water circulation outer pipe is connected to the sand shooting base.
7. The sand injection nozzle of the coated sand mold according to claim 4, characterized in that: The sealing component includes a high-temperature resistant sealing gasket and a sand shooting nut; the extended end of the water circulation outer pipe and the sand shooting end of the sand shooting nozzle body are flush with each other. The sand shooting nut is connected to the extended end of the water circulation outer pipe, and an installation groove is provided between the two. The high-temperature resistant sealing gasket is mounted in the installation groove, and the extended end of the water circulation outer pipe and the sand shooting end of the sand shooting nozzle body abut against the high-temperature resistant sealing gasket; a sand shooting through groove that is opened during sand shooting is provided at a position corresponding to the sand shooting port of the sand shooting end on the high-temperature resistant sealing gasket, and a sand shooting channel communicating with the sand shooting port is provided inside the sand shooting nut.
8. The sand injection nozzle of the coated sand mold according to claim 7, characterized in that: The end of the extended end of the water circulation outer pipe is recessed inward to form a stepped structure, and the pipe body in the small step area abuts against the sand shooting end of the sand shooting nozzle body and is flush with the sand shooting end. External threads are provided on the outer side of the pipe body in the large step area; a threaded groove is provided at one end of the sand shooting nut facing the sand shooting nozzle body; internal threads are provided on the groove wall of the threaded groove, and the sand shooting nut is threadedly connected to the outer threads on the outer side of the extended end of the water circulation outer pipe to be connected to the water circulation outer pipe, and the high-temperature resistant sealing gasket is mounted at the bottom of the threaded groove.
9. The sand injection nozzle of the coated sand mold according to claim 7, characterized in that: A chamfer structure is provided on the outer side of the end of the sand shooting nut away from the sand shooting nozzle body to form an insertion part for inserting into the sand shooting hole of the coated film mold.
10. A sand injection nozzle for a coated sand mold according to claim 7, characterized in that: The sand shooting through groove of the high-temperature resistant sealing gasket is a cross groove structure.