Amine blowing and sand shooting device
By adding seals to the amine-blowing sand injection device and improving the core rod structure, the air tightness problem of the sand injection device and the amine-blowing device is solved, the sand core quality and sand injection pressure are improved, and the 3-B Amines leakage protects the environment and operator health.
Patent Information
- Application Number
- CN202323388077.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-11
- Publication Date
- 2024-12-17
- Estimated Expiration
- 2033-12-11
AI Technical Summary
In the existing cold core box core making process, the sand injection device and amine blowing device have airtight problems, resulting in false injection of the sand core and leakage of triethylamine, affecting the casting process and environmental safety.
Design an amine-blowing sand injection device, add a sealing connection between the sand injection nozzle and the sand injection nozzle, improve the core rod structure, eliminate the gap with the amine-blowing plate, and ensure airtightness and sealing .
It significantly improves the quality of the sand core and the stability of the sand injection pressure, reduces the leakage of triethylamine, protects the environment and operators' health, and reduces waste rate and energy waste.
Smart Images
Figure CN222175847U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of sand core molding, in particular to an amine blowing sand shooting device. Background Art
[0002] In the casting production process, the cold core box core making process has been widely used due to its advantages such as high efficiency, energy saving and good working conditions. Among them, the triethylamine aerosol cold core box method as the most common process has the advantages of short demoulding time, high production efficiency and low energy consumption.
[0003] However, this core making process requires a highly airtight environment. If the cold core box is not airtight, the prepared sand core will have the defect of not being shot solid, or even worse, the sand core cannot be prepared. The defect of not being shot solid has a great impact on the casting process, such as: the core assembly process, the poor fit between the sand cores, and the situation of multiple materials in the blank after pouring. In addition, the leakage of triethylamine caused by poor airtightness will also harm the environment and the health of the operator.
[0004] The current cold core box structure, especially the sand-shooting device and the amine-blowing device, has a big airtightness problem. Among them, in order to facilitate the replacement of the sand-shooting nozzle, the sand-shooting nozzle is assembled to the sand-shooting plate through a flange bolt assembly, which causes the sand-shooting plate and the upper template to be connected and matched when sand-shooting, resulting in poor airtightness. In the amine-blowing device, in order to prevent the uneven surface of the sand core, the top core rod on the top core plate passes through the amine-blowing plate and is inserted into the upper template to be flush with the prefabricated sand core. When the top core rod passes through the amine-blowing plate, there will be a gap between the top core rod and the amine-blowing plate. When blowing amine, triethylamine will overflow into the external environment through this gap. Utility Model Content
[0005] In order to solve at least one problem in the prior art, the main purpose of the utility model is to provide an amine sand blowing device, which ensures that the pressure of compressed air entering the sand core cavity is maintained at the process level by adding a sealing component, thereby ensuring the stability of the sand shooting pressure and significantly improving the quality of the sand core. The sealing component has the advantages of high feasibility, replaceability and low price.
[0006] In order to achieve the above object, the utility model provides an amine blowing sand shooting device, which comprises an upper core box body and a sand shooting plate placed above the upper core box body, and the position of the sand shooting plate is movable;
[0007] The sand shooting plate is detachably provided with a sand shooting nozzle, and the upper core box body is provided with a sand shooting port used in conjunction with the sand shooting nozzle;
[0008] A sealing member is detachably provided on the outer side wall of the sand shooting nozzle, and the sealing member is used for sealing connection between the sand shooting nozzle and the sand shooting port.
[0009] Furthermore, the sealing member is annular and sleeved on the outer side wall of the sand shooting nozzle.
[0010] Furthermore, a groove is provided on the outer side wall of the sand shooting nozzle along its circumference, and the sealing member is arranged at the groove.
[0011] Furthermore, the inner diameter of the sealing member is the same as the outer diameter of the sand shooting nozzle, and the outer diameter of the sealing member is larger than the diameter of the sand shooting nozzle.
[0012] Further, the sand shooting nozzle is arranged on the sand shooting plate through a connecting piece, and the sealing piece is arranged between the connecting piece and the upper core box body.
[0013] Furthermore, it also includes an amine blowing plate placed above the upper core box body, and the position of the amine blowing plate is movable;
[0014] An air blowing channel connected to the sand shooting port is formed between the amine blowing plate and the upper core box body, a core pusher rod is detachably provided on the amine blowing plate, and the core pusher rod is arranged corresponding to the sand shooting port, and there is a gap between the outer wall of the core pusher rod and the inner wall of the sand shooting port.
[0015] Furthermore, it also includes a lower core box body matched with the upper core box body, the upper core box body and the lower core box body are enclosed to form a sand core cavity, and the sand core cavity is connected to the sand shooting port.
[0016] Furthermore, the core rod is cylindrical, one end of the core rod is arranged on the amine blowing plate, and the end of the core rod away from the amine blowing plate is a free end; the free end extends into the sand shooting port.
[0017] Furthermore, a delivery channel is provided at one end of the core push rod away from the amine blowing plate, and the delivery channel is connected to the sand shooting port for delivering gas to the sand core cavity.
[0018] Furthermore, the longitudinal section of the conveying channel is T-shaped or cross-shaped.
[0019] Advantages of this utility model:
[0020] 1) The utility model improves the air tightness of the amine sand blowing device by improving the structure and adding sealing parts, thereby ensuring the stability of the sand shooting pressure, thereby ensuring the integrity of the sand core and improving the quality of the sand core.
[0021] 2) In the utility model, the installation position of the seal is designed, so that the air tightness is ensured and the replacement of the sand-shooting nozzle and the seal is convenient.
[0022] 3) If false shooting occurs in the present invention, it can be solved by replacing the sealing element, which is fast and efficient.
[0023] 4) The top core plate is removed in the utility model, thereby ensuring the sealing when blowing amine, preventing the leakage of toxic gases, effectively reducing the harm caused by the leakage of triethylamine in the production process, reducing pollution, and protecting human health.
[0024] 5) Reduce waste and solve energy problems. BRIEF DESCRIPTION OF THE DRAWINGS
[0025] By reading the detailed description of the preferred embodiment below, various other advantages and benefits will become clear to those skilled in the art. The accompanying drawings are only used for the purpose of illustrating the preferred embodiment and are not to be considered as limiting the present invention. In the accompanying drawings:
[0026] Figure 1 A schematic diagram of the structure of the sandblasting plate and the upper core box body in the embodiment provided by the utility model when used in conjunction with each other;
[0027] Figure 2 A schematic diagram of the structure of the amine blowing plate and the upper core box body when used in conjunction with each other in the embodiment provided by the utility model;
[0028] Figure 3 A comparison diagram of the air pressure in the sand core cavity before and after the sealing member is set in the embodiment provided by the utility model;
[0029] Figure 4 A comparison chart of the number of cores made and waste cores in a three-day period with and without a seal in the embodiment provided by the utility model.
[0030] In the figure:
[0031] 1. Core box body; 11. Sand shooting port;
[0032] 2. Lower core box body;
[0033] 3. Sand shooting plate; 31. Sand shooting channel;
[0034] 4. Blowing amine board;
[0035] 5. Sand shooting nozzle;
[0036] 6. Seals;
[0037] 7. Connecting piece; 71. Flange; 72. Bolt;
[0038] 8. Air blowing channel;
[0039] 9. Core rod; 91. Conveying channel. DETAILED DESCRIPTION
[0040] The exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided in order to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.
[0041] Cold core box core making process: The core making method in which the sand core is quickly hardened in the core box by blowing air (such as triethylamine) at room temperature is called the cold core box method.
[0042] Sand shooting nozzle: a connecting device for injecting core sand into the cold core box.
[0043] Sand core curing principle: Two resins (phenolic resin and polyisocyanate) are added to the core sand as a binder. The two compounds react to form polyurethane compounds, which can be used as a core sand binder to bond the sand particles together to form a sand mold. In order to speed up the reaction rate, triethylamine is used as a catalyst for the two resins to bond the resins to the core sand and then solidify.
[0044] In order to facilitate the replacement of the sand shooting nozzle 5, the sand shooting nozzle 5 is assembled to the sand shooting plate 3 through a connecting piece 7, such as a flange 71 and a bolt 72. However, in the actual production process, it is found through analysis that the setting of the connecting piece 7 will cause the sand shooting plate 3 and the upper core box body 1 to be connected and matched for sand shooting. The two cannot be completely sealed, resulting in poor air tightness, which can easily cause the sand core to have the defect of not being shot solid.
[0045] In order to prevent the defect of uneven upper surface of the sand core, the top core rod on the top core plate passes through the amine blowing plate 4 and is inserted into the upper core box body 1 to be flush with the prefabricated sand core. When the top core rod passes through the amine blowing plate 4, a gap will appear between the top core rod and the amine blowing plate 4. When blowing amine, triethylamine will overflow into the external environment through this gap.
[0046] In view of this, the utility model provides an amine blowing sand blasting device, aiming to provide a high-quality and high-airtightness amine blowing sand blasting device to solve at least one existing problem in the industry.
[0047] The utility model provides two strategies of adding a sealing element and improving the core rod structure. After the structure is improved, the quality of the sand core is significantly improved and the operating environment is significantly improved.
[0048] like Figure 1As shown, the amine sand blowing device includes an upper core box body 1 and a sand shooting plate 3 placed above the upper core box body 1, and the position of the sand shooting plate 3 is movable; when the sand shooting operation is required, the sand shooting plate 3 is moved to a suitable position so that the sand shooting plate 3 is connected and matched with the upper core box body 1 to realize sand shooting. Among them, a sand shooting nozzle 5 is detachably provided on the sand shooting plate 3, and a sand shooting port 11 used in conjunction with the sand shooting nozzle 5 is opened on the upper core box body 1. Sand is shot into the sand shooting port 11 through the sand shooting nozzle 5, thereby shooting the core sand from the sand shooting port 11 into the sand core cavity. A seal 6 is detachably provided on the outer wall of the sand shooting nozzle 5, and the seal 6 is used for the sealing connection at the matching position of the sand shooting nozzle 5 and the sand shooting port 11, ensuring that the pressure of the compressed air entering the sand core cavity is maintained at the process level, ensuring the stability of the sand shooting pressure, and reducing the leakage of triethylamine while ensuring air tightness, reducing pollution, and protecting human health.
[0049] like Figure 1 As shown, the sealing member 6 is annular and sleeved on the outer wall of the sand shooting nozzle 5 to form an efficient and sealed connection between the sand shooting nozzle 5 and the sand shooting port 11 .
[0050] In the embodiment of the present utility model, the inner diameter of the sealing member 6 is the same as the outer diameter of the sand shooting nozzle 5 , and the outer diameter of the sealing member 6 is larger than the diameter of the sand shooting port 11 to ensure the sealing performance.
[0051] Exemplarily, the inner diameter of the seal 6 is ΦA, and the outer diameter is ΦA+5 mm.
[0052] In the embodiment of the present utility model, in consideration of the sealing effect and the need for replacement due to wear, the sealing member 6 is made of a heat-resistant material, such as a heat-resistant fluororubber material.
[0053] In the embodiment of the utility model, the sealing member 6 and the sand-shooting nozzle 5 are connected and matched with each other by an adhesive to achieve efficient sealing.
[0054] In the embodiment of the utility model, a groove is provided on the outer wall of the sand shooting nozzle 5 along its circumference, and the sealing member 6 is arranged at the groove, thereby improving the stability of the connection between the two.
[0055] like Figure 1 As shown, the sand shooting nozzle 5 is arranged on the sand shooting plate 3 through a connecting member 7 , and a sealing member 6 is arranged between the connecting member 7 and the upper core box body 1 .
[0056] In the embodiment of the utility model, the seal 6 is installed below the connector 7, which is equivalent to sandwiching the seal 6 between the connector 7 and the upper core box body 1, which does not affect the replacement of the connector 7 and the seal 6 and can solve the problem of poor airtightness.
[0057] In the embodiment of the present utility model, the connecting member 7 is a flange bolt assembly, wherein a flange 71 connected with the sand blasting nozzle 5 is arranged on the sand blasting plate 3 by bolts 72 .
[0058] Exemplarily, when the sand blasting plate 3 is connected to the upper core box body 1 for sand blasting, the seal 6 is sandwiched between the flange 71 and the upper core box body 1 .
[0059] like Figure 1 As shown, a sand shooting channel 31 is provided on the sand shooting plate 3, and the sand shooting nozzle 5 is arranged corresponding to the sand shooting channel 31, and the internal channel of the sand shooting nozzle 5 is connected to the sand shooting channel 31. The core sand enters the sand shooting nozzle 5 through the sand shooting channel 31, and is shot into the sand core cavity through the sand shooting port 11.
[0060] like Figure 2 As shown, the amine blowing sand shooting device also includes a lower core box body 2 matched with the upper core box body 1 , and the upper core box body 1 and the lower core box body 2 are enclosed to form a sand core cavity, and the sand core cavity is connected to the sand shooting port 11 .
[0061] like Figure 2 As shown, the amine blowing sand shooting device also includes an amine blowing plate 4 placed above the upper core box body 1, and the position of the amine blowing plate 4 is movable; when the amine blowing operation is required, the amine blowing plate 4 is moved to a suitable position so that the amine blowing plate 4 is connected and matched with the upper core box body 1 to achieve amine blowing. An air blowing channel 8 connected to the sand shooting port 11 is formed between the amine blowing plate 4 and the upper core box body 1, and triethylamine is blown into the air blowing channel 8 by an external air source. A top core rod 9 is detachably provided on the amine blowing plate 4, and the top core rod 9 is arranged corresponding to the sand shooting port 11, and there is a gap between the outer side wall of the top core rod 9 and the inner side wall of the sand shooting port 11.
[0062] In the utility model, the traditional amine blowing top core structure is improved, the top core plate is removed, and the top core rod 9 is directly assembled on the amine blowing plate 4, which completely eliminates the hidden danger of triethylamine overflowing through the gap between the top core rod and the amine blowing plate in the traditional structure.
[0063] like Figure 2 As shown, the core rod 9 is cylindrical, one end of the core rod 9 is arranged on the amine blowing plate 4, and the end of the core rod 9 away from the amine blowing plate 4 is a free end; the free end extends into the sand blasting port 11.
[0064] like Figure 2 As shown, a delivery channel 91 is provided at one end of the core rod 9 away from the amine blowing plate 4. It can be understood that a delivery channel 91 is provided on the free end of the core rod 9, and the delivery channel 91 is connected to the sand shooting port 11 for delivering gas to the sand core cavity.
[0065] In the embodiment of the present invention, the longitudinal section of the delivery channel 91 is T-shaped or cross-shaped.
[0066] In the embodiment of the utility model, the air tightness of the amine sand blowing device is verified by testing the air pressure inside the sand core cavity.
[0067] The pressure inside the sand core cavity is tested with a pressure gauge when there is no seal 6 and when a seal 6 (such as a sealing ring) is added. The test results are as follows: Figure 3 shown.
[0068] The analysis results show that the air pressure is 2.1 bar without the seal 6, and the air pressure is 3.2 bar after the seal 6 (such as a sealing ring) is installed. After the seal 6 is added, the air pressure in the sand core cavity increases by 85.7%, and the air tightness is significantly improved.
[0069] At the same time, the defect of false shooting has also been well solved. Due to the increase of the sealing member 6, the internal air pressure of the sand core cavity increases, which ensures the quality of the sand core making.
[0070] In the present invention, statistics and summaries are conducted over a period of time, and the core making and waste core situation are counted in a three-day cycle. It is found that the core making waste rate is reduced from 10.53% to 0.98%. Figure 4 This shows that adding the seal 6 greatly improves the core making qualification rate.
[0071] It should be noted that the term "comprises" and any variations thereof in the specification and claims of the present invention are intended to cover non-exclusive inclusions. For example, the inclusion of a series of components is not necessarily limited to those components explicitly listed, but may include other components that are not explicitly listed or inherent to the components.
[0072] In the present invention, the directions or positional relationships indicated by terms such as "upper", "lower", "bottom", "top", "left", "right", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings. These terms are mainly used to better describe the present invention and its embodiments, and are not used to limit the indicated devices, elements or components to have specific directions, or to be constructed and operated in specific directions.
[0073] In addition, some of the above terms may be used to express other meanings in addition to indicating orientation or positional relationship. For example, the term "on" may also be used to express a certain dependency or connection relationship in some cases. For those skilled in the art, the specific meanings of these terms in this utility model can be understood according to specific circumstances.
[0074] In addition, the descriptions of "first", "second", etc. in the present invention are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features.
[0075] In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the fact that ordinary technicians in the field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.
[0076] The above is only a preferred specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the utility model should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.
Claims
1. An amine sand blowing device, characterized in that: It comprises an upper core box body and a sand shooting plate placed above the upper core box body, and the position of the sand shooting plate is movable; The sand shooting plate is detachably provided with a sand shooting nozzle, and the upper core box body is provided with a sand shooting port used in conjunction with the sand shooting nozzle; A sealing member is detachably provided on the outer wall of the sand shooting nozzle, the sealing member is annular and sleeved on the outer wall of the sand shooting nozzle, and the sealing member is used for sealing connection between the sand shooting nozzle and the sand shooting port; A groove is provided on the outer side wall of the sand shooting nozzle along its circumference, and the sealing member is arranged at the groove.
2. The amine sand blowing device according to claim 1, characterized in that: The inner diameter of the sealing member is the same as the outer diameter of the sand shooting nozzle, and the outer diameter of the sealing member is larger than the diameter of the sand shooting nozzle.
3. The amine sand blowing device according to claim 1, characterized in that: The sand shooting nozzle is arranged on the sand shooting plate through a connecting piece, and the sealing piece is arranged between the connecting piece and the upper core box body.
4. The amine sand blowing device according to claim 1, characterized in that: It also includes an amine blowing plate placed above the upper core box body, and the position of the amine blowing plate is movable; An air blowing channel connected to the sand shooting port is formed between the amine blowing plate and the upper core box body, a core pusher rod is detachably provided on the amine blowing plate, and the core pusher rod is arranged corresponding to the sand shooting port, and there is a gap between the outer wall of the core pusher rod and the inner wall of the sand shooting port.
5. The amine sand blowing device according to claim 1 or 4, characterized in that: It also includes a lower core box body matched with the upper core box body, the upper core box body and the lower core box body are surrounded to form a sand core cavity, and the sand core cavity is connected to the sand shooting port.
6. The amine sand blowing device according to claim 4, characterized in that: The core rod is in a columnar shape, one end of the core rod is arranged on the amine blowing plate, and the end of the core rod away from the amine blowing plate is a free end; the free end extends into the sand shooting port.
7. The amine sand blowing device according to claim 4 or 6, characterized in that: A delivery channel is provided at one end of the core push rod away from the amine blowing plate. The delivery channel is connected to the sand shooting port and is used for delivering gas to the sand core cavity.
8. The amine sand blowing device according to claim 7, characterized in that: The longitudinal section of the conveying channel is T-shaped or cross-shaped.