A heterogeneous double-layer sand box cooling device

Abstract

The application discloses a kind of different kinds of double-layer sand box cooling device, it is related to sand mould cooling technical field, including: base, the base is used to carry sand mould;Inner shell, the inner shell is used to set in sand mould outside, the inner shell is made of heat transfer material, outer shell is provided outside the inner shell, the outer shell is made of heat preservation material, the outer shell is used to prevent sand mould disorder heat dissipation;Ventilation component, the ventilation component is set in base, the ventilation component is used to bring out heat from the top of inner shell on the surface of inner shell;Hot spot component, the hot spot component is set between inner shell and outer shell, the hot spot component includes: L-shaped frame, the L-shaped frame is fixedly connected with heat transfer plate at one end close to inner shell, a plurality of heat rods are fixedly connected on the heat transfer plate, abutting component is provided at one end close to outer shell of the L-shaped frame, and the abutting component is used to tightly stick heat transfer plate and outer wall of inner shell.

Description

Technical Field

[0001] This invention relates to the field of sand mold cooling technology, specifically to a heterogeneous double-layer sand box cooling device. Background Technology

[0002] In sand casting, the common practice for sand boxes is to hang them on an electric hoist on an upper guide rail and sequentially enter a spray box and a drying box in a rhythmic manner. The spraying is supplied by a water tank and a water pump, and the water is recycled through a recovery and filtration mechanism. Adjustable-angle nozzles cover different parts of the sand box to enhance water cooling. The sand box is then transferred to the drying box to remove residual water and attached sand dust. The entire line is linked by a PLC to achieve continuous handling and water resource recycling. This is a relatively mature external cooling path.

[0003] There are also publicly available technologies that attempt to use low-temperature carbon dioxide gas formed by the sublimation of dry ice for rapid gas cooling. This method has a fast cooling response and a good cleaning effect on the surface of the workpiece. However, the consumption and replenishment of consumables are relatively cumbersome, making it difficult to achieve good economic efficiency and convenience in long-term, stable continuous production.

[0004] In summary, the cooling effect of the existing path mainly occurs in the external environment of the sand box, which makes it difficult to effectively guide the temperature gradient and directional solidification of the "hot spot - non-hot spot" inside the mold. The ability to suppress defects such as shrinkage cavities, cracks, and sand inclusions is limited. After external spraying, a drying process must be configured, which adds time and energy consumption. The humid and hot environment brings problems such as external wall corrosion and water and dust. The system also requires supporting units such as water storage, filtration, and drying, which increases the size and maintenance costs.

[0005] Therefore, we propose a heterogeneous double-layer sand box cooling device. Summary of the Invention

[0006] The purpose of this invention is to provide a dissimilar double-layer sand box cooling device to solve the problems mentioned in the background art. To achieve the above objective, this invention provides the following technical solution: a dissimilar double-layer sand box cooling device, comprising:

[0007] The base is used to support the sand mold;

[0008] The inner shell is used to be fitted over the sand mold. The inner shell is made of heat transfer material. An outer shell is provided outside the inner shell. The outer shell is made of heat insulation material. The outer shell is used to prevent disordered heat dissipation from the sand mold.

[0009] A ventilation assembly is disposed within the base and is used to carry away heat from the surface of the inner housing from the top of the inner housing.

[0010] A hotspot component, disposed between the inner housing and the outer housing, comprises:

[0011] An L-shaped frame is provided, with a heat transfer plate fixedly connected to one end of the L-shaped frame near the inner shell. Several heat rods are fixedly connected to the heat transfer plate. An abutment component is provided at one end of the L-shaped frame near the outer shell, which is used to tightly press the heat transfer plate against the outer wall of the inner shell.

[0012] Preferably, the ventilation assembly includes:

[0013] A heat sink is fixedly connected to the bottom of a base in a circumferential array. The bottom of the base is sloping and has an air collecting plate at the bottom. The air collecting plate is fixedly connected to the base and the outer wall of the air collecting plate is fixedly connected to a bottom shell. An air inlet pipe is provided inside the bottom shell and the air outlet of the air inlet pipe is located at the center of the air collecting plate.

[0014] Preferably, the abutment component includes:

[0015] A connecting rod is slidably connected to an L-shaped frame. A spring is fitted over the connecting rod, with one end of the spring fixedly connected to the connecting rod and the other end fixedly connected to the L-shaped frame.

[0016] Preferably, the outer shell has a plurality of slots arranged in an array, the slots are segmented along the vertical direction, and the slots gradually increase in size from bottom to top. The slots are used to embed L-shaped frames of different sizes. The top of the inner shell is provided with a snap-fit ​​assembly, which is used to fix the hotspot assembly.

[0017] Preferably, the snap-fit ​​assembly includes:

[0018] The heat dissipation fins are arranged in several groups at intervals along the top edge of the inner shell. The heat dissipation fins are fixedly connected to the contact members for engaging with the top of the heat rod. The heat dissipation fins are fixedly connected to the side of the outer shell with a fixing member, which is bolted to the outer shell.

[0019] Preferably, connecting rods are fixedly connected to the four corners of the inner shell, and the connecting rods are bolted to the outer shell.

[0020] This invention has at least the following beneficial effects:

[0021] 1. The cooling function is built into the sand box body structure, and the heat is extracted in sections and at fixed points close to the sand mold. Compared with external spraying or air cooling which only acts on the outer surface, it can more effectively reduce the temperature difference between "hot spot and non-hot spot". Combined with directional upward airflow, it is conducive to directional solidification and maintenance of the feeding path, and suppresses defects such as shrinkage cavities, cracks and sand inclusions from the source.

[0022] 2. Dry heat extraction with ventilation components as the core replaces or significantly reduces external spraying and independent drying stations, avoiding damp heat corrosion and water and dust, reducing system size, water and drying energy consumption, and shortening the unpacking cycle.

[0023] 3. The hot spot component achieves long-term stable contact with the inner shell through the elastic pre-tightening of the abutment component, resulting in low thermal resistance and fast thermal response. Furthermore, the heat pipe "lifts" the heat from the hot spot to the high flow rate zone at the top for extraction, thereby enhancing local cooling efficiency.

[0024] 4. The outer casing provides thermal insulation and shielding, suppresses disordered heat dissipation, and improves the controllability and repeatability of heat flow. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0026] Figure 2 This is a schematic diagram of the ventilation component structure of the present invention;

[0027] Figure 3 This is a schematic diagram of the air collection plate structure of the present invention;

[0028] Figure 4 This is a schematic diagram of the L-shaped frame structure of the present invention;

[0029] Figure 5 This is a schematic diagram of the heat dissipation fin structure of the present invention;

[0030] Figure 6 This is a schematic diagram of the card slot structure of the present invention;

[0031] Figure 7 For the present invention Figure 2 Enlarged structural diagram of section A;

[0032] Figure 8 This is a schematic diagram of the air collection plate structure of the present invention;

[0033] Figure 9 For the present invention Figure 8 Enlarged structural diagram of section B.

[0034] In the diagram: 10. Base; 11. Inner shell; 12. Outer shell; 20. Ventilation assembly; 21. Heat sink; 22. Air collection plate; 23. Bottom shell; 24. Air inlet pipe; 30. Hot spot assembly; 31. L-shaped frame; 32. Heat transfer plate; 33. Heat rod; 40. Abutment assembly; 41. Abutment rod; 42. Spring; 50. Snap-fit ​​assembly; 51. Heat dissipation fins; 52. Contact element; 53. Fixing element; 61. Connecting rod; 121. Slot. Detailed Implementation

[0035] 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. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0036] Example 1: Please refer to Figure 1-9 The present invention provides a technical solution: a heterogeneous double-layer sand box cooling device, comprising:

[0037] Base 10, the base 10 is used to support the sand mold;

[0038] The inner shell 11 is used to be fitted over the sand mold. The inner shell 11 is made of heat transfer material. An outer shell 12 is provided outside the inner shell 11. The outer shell 12 is made of heat insulation material and is used to prevent disordered heat dissipation from the sand mold.

[0039] Ventilation component 20, which is disposed inside the base 10, is used to carry away heat from the surface of the inner shell 11 from the top of the inner shell 11.

[0040] Hotspot component 30, disposed between inner housing 11 and outer housing 12, includes:

[0041] L-shaped frame 31, with a heat transfer plate 32 fixedly connected to one end of the L-shaped frame 31 near the inner shell 11, and a plurality of heat rods 33 fixedly connected to the heat transfer plate 32. An abutting component 40 is provided at one end of the L-shaped frame 31 near the outer shell 12, and the abutting component 40 is used to tightly attach the heat transfer plate 32 to the outer wall of the inner shell 11.

[0042] It should be noted that after casting, the sand mold conducts heat through surface contact with the inner shell 11. Due to the rapid thermal conductivity of the material, the inner shell 11 first rapidly spreads the heat from the outside of the sand mold within its walls and guides it upwards and outwards. The ventilation components 20 inside the base 10 form a directional airflow from bottom to top, constructing a controlled flow field "from bottom to top" along the outer surface of the inner shell 11. This carries away the boundary layer heat and steam adhering to the surface of the inner shell 11 from the top of the inner shell 11, thereby completing the overall heat extraction of the sand mold. For local hot spots caused by differences in the geometry of the castings, directional heat extraction is achieved through hot spot components. The L-shaped frame 31 in the hot spot component 30 is fixed between the inner and outer shells, allowing the heat transfer plate 32 to reliably adhere to the outer wall of the inner shell 11 under the elastic pre-tightening action of the abutment component 40, thus achieving stable surface contact heat exchange in the hot spot area. The heat rods 33 on the heat transfer plate 32, which are high thermal conductivity solid rods or two-phase thermal conductive components, absorb heat at the contact interface and rapidly transport the heat along their axial direction to the high flow velocity area above or the area adjacent to the top heat dissipation component, so that the local heat is preferentially carried away by the rising airflow formed by the ventilation component 20. By superimposing the overall channel of "heat conduction of the inner shell - heat extraction by the ventilation component" with "local heat pickup by the heat transfer plate / heat rod", uniform cooling of the entire box is ensured, and priority cooling of the hot spots is achieved. The insulating outer shell 12 between the inner and outer shells restricts disordered lateral heat dissipation, forcing the heat to be extracted along a set path, thereby achieving a predictable and reproducible cooling process.

[0043] It is worth noting that the cooling effect is built into the sand box body structure, and the cooling is carried out in a zoned and fixed-point manner close to the sand mold. Compared with external spraying or air cooling which only acts on the outer surface, it can more effectively reduce the temperature difference between "hot spots and non-hot spots". Combined with directional upward airflow, it is conducive to directional solidification and maintenance of the shrinkage path, and suppresses defects such as shrinkage cavities, cracks and sand inclusions from the source. The dry heat extraction with ventilation component 20 as the core replaces or significantly reduces external spraying and independent drying station, avoids wet heat corrosion and water and dust, reduces system size, water and drying energy consumption, and shortens the opening cycle. Hot spot component 30 achieves long-term stable contact with inner shell 11 through elastic pre-tightening of abutment component 40. It has low thermal resistance and fast thermal response. In addition, heat rod 33 "lifts" the heat of hot spots to the top high flow rate zone for exhaust, which enhances local cooling efficiency. Outer shell 12 provides thermal insulation shielding, suppresses disordered heat dissipation, and improves the controllability and repeatability of heat flow.

[0044] Further, as shown in Figures 2, 7, 8, and 9, it is worth noting that the ventilation assembly 20 includes:

[0045] Heat sink 21, the heat sink 21 is fixedly connected to the bottom of the base 10 in a circumferential array, the bottom of the base 10 is sloping, the bottom of the base 10 is provided with an air collecting plate 22, the air collecting plate 22 is fixedly connected to the base 10, the outer wall of the air collecting plate 22 is fixedly connected to the bottom shell 23, the bottom shell 23 is provided with an air inlet pipe 24, the air outlet of the air inlet pipe 24 is located at the center of the air collecting plate 22;

[0046] It should be noted that the airflow path of the ventilation component 20 is as follows: the bottom shell 23 and the air collecting plate 22 together form the bottom air cavity. After the external airflow enters the air cavity from the center of the air collecting plate 22 through the air inlet pipe 24, it is evenly distributed along the circumference under the guidance of the heat dissipation plate 21, and flows upward along the outer wall of the inner shell 11, and finally carries away the heat from the top of the inner shell 11. Among them, the heat dissipation plate 21 plays the role of increasing the heat exchange area and guiding the airflow.

[0047] Further, as shown in Figure 4, it is worth noting that the abutment component 40 includes:

[0048] Abutting rod 41 is slidably connected to an L-shaped frame 31. A spring 42 is sleeved on the abutting rod 41. One end of the spring 42 is fixedly connected to the abutting rod 41, and the other end is fixedly connected to the L-shaped frame 31.

[0049] It should be noted that in the abutment assembly 40, the abutment rod 41 and the L-shaped frame 31 are laterally slidingly connected, and the end of the abutment rod 41 near the outer shell 12 has a rounded head. The spring 42 is sleeved on the outside of the abutment rod 41 and is in a compressed state, continuously providing pre-tightening force in the normal direction pointing towards the inner shell 11, so that the heat transfer plate 32 and the outer wall of the inner shell 11 remain reliably in contact. The lateral sliding fit gives the abutment assembly 40 the ability to follow and compensate in the horizontal direction. Even if lateral displacement occurs due to installation tolerances or thermal expansion and contraction, it can maintain the fit without reducing the normal clamping force, thereby reducing contact thermal resistance and preventing delamination. The rounded head structure is used to disperse local stress and reduce friction during contact and micro-movement, ensuring a smooth and stable abutment process.

[0050] Further, as shown in Figure 5 and Figure 6 As shown, it is worth noting that the outer shell 12 has several slots 121 arranged in an array. The slots 121 are arranged in segments along the vertical direction. The slot shape of each segment of the slot 121 gradually increases from bottom to top. The slots 121 are used to embed L-shaped frames 31 of different sizes. The top of the inner shell 11 is provided with a snap-fit ​​component 50, which is used to fix the hot spot component 30.

[0051] It should be noted that the slot 121 is segmented vertically and gradually increases in size from bottom to top, allowing for the selective insertion and positioning of L-shaped frames 31 with different cross-sectional dimensions or installation depths at the same vertical position. The selected L-shaped frame 31 carries a heat pipe 33 that matches the height of that segment, so that by selecting different segments of the slot 121, the heat pipe 33 can be aligned with the hot spot area on the outer wall of the inner shell 11 at the corresponding height, thereby achieving targeted heat extraction at the corresponding height. The snap-fit ​​assembly 50 and the slot 121 form an upper snap-fit ​​and lower insertion cooperation relationship, restricting the relative displacement of the hot spot assembly 30 in the vertical and radial directions, and working together with the elastic pre-tightening of the abutment assembly 40 to ensure that the heat transfer plate 32 remains in close contact with the outer wall of the inner shell 11.

[0052] Further, as shown in Figure 5, it is worth noting that the snap-fit ​​assembly 50 includes:

[0053] Heat dissipation fins 51, several groups of heat dissipation fins are arranged circumferentially along the top edge of the inner shell 11, and contact members 52 for engaging with the top of the heat rod 33 are fixedly connected to the heat dissipation fins 51. A fixing member 53 is fixedly connected to the side of the heat dissipation fins 51 near the outer shell 12, and the fixing member 53 is bolted to the outer shell 12.

[0054] It should be noted that the fastener 53 and the outer casing 12 are connected by bolts in a detachable structure. The purpose of this is to remove the corresponding heat sink fins 51 without removing the outer casing 12 to form an inspection window, so as to expose the contact 52 and the end of the heat pipe 33 for position adjustment, such as replacing the L-shaped bracket 31 of the corresponding height section.

[0055] Further, as shown in Figures 1 and 2, it is worth noting that connecting rods 61 are fixedly connected at the four corners of the inner shell 11, and the connecting rods 61 are bolted to the outer shell 12.

[0056] It should be noted that the bolted connection between the connecting rod 61 and the outer shell 12 is used for quick unlocking and resetting during the assembly and adjustment stage: during assembly, first loosen and remove the bolts between the outer shell 12 and the connecting rod 61, and then separately cover the outer side of the sand mold with the inner shell 11, using the connecting rod 61 as a holding and positioning reference; then, use a temperature detection device to briefly monitor the contact surface between the inner shell 11 and the sand mold to determine the parts and heights where the temperature rises faster, and adjust the alignment position of the L-shaped frame 31 and the hot rod 33 in the hot spot assembly 30 at the corresponding section of the outer shell 12 accordingly; after the alignment is completed, insert and reset the outer shell 12 so that the hot spot assembly 30 is inserted at the target cooling point and matches the corresponding position of the inner shell 11, and finally tighten the bolts to fix the outer shell 12 and the connecting rod 61 to ensure that the relative positions of the inner and outer shells and the hot spot assembly are determined and remain stable in subsequent operation. After assembly, the castings in this sand mold can be reused according to this scheme.

[0057] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0058] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, all of which fall within the scope of protection of the present invention.

Claims

1. A heterogeneous double-layer sand box cooling device, characterized in that, include: A base (10) is used to support a sand mold; The inner shell (11) is used to be fitted over the sand mold. The inner shell (11) is made of heat transfer material. An outer shell (12) is provided outside the inner shell (11). The outer shell (12) is made of heat insulation material. The outer shell (12) is used to prevent disordered heat dissipation from the sand mold. Ventilation assembly (20), which is disposed inside the base (10), is used to carry away heat from the surface of the inner shell (11) from the top of the inner shell (11); A hotspot component (30) is disposed between the inner housing (11) and the outer housing (12), the hotspot component (30) comprising: L-shaped frame (31), with a heat transfer plate (32) fixedly connected to one end of the L-shaped frame (31) near the inner shell (11), and a number of heat rods (33) fixedly connected to the heat transfer plate (32). An abutment component (40) is provided at one end of the L-shaped frame (31) near the outer shell (12), and the abutment component (40) is used to press the heat transfer plate (32) against the outer wall of the inner shell (11). The ventilation assembly (20) includes: Heat sink (21), the heat sink (21) is fixedly connected to the bottom of the base (10) in a circumferential array, the bottom of the base (10) is sloping, the bottom of the base (10) is provided with a wind collecting plate (22), the wind collecting plate (22) is fixedly connected to the base (10), the outer wall of the wind collecting plate (22) is fixedly connected to the bottom shell (23), the bottom shell (23) is provided with an air inlet pipe (24), the air outlet of the air inlet pipe (24) is located at the center of the wind collecting plate (22); The abutment component (40) includes: Abutting rod (41) is slidably connected to an L-shaped frame (31). A spring (42) is provided on the outer sleeve of the abutting rod (41). One end of the spring (42) is fixedly connected to the abutting rod (41), and the other end is fixedly connected to the L-shaped frame (31). The outer shell (12) is provided with a plurality of slots (121) arranged in an array. The slots (121) are arranged in segments along the vertical direction. The slots (121) gradually increase in size from bottom to top. The slots (121) are used to embed L-shaped frames (31) of different sizes. The top of the inner shell (11) is provided with a snap-fit ​​assembly (50). The snap-fit ​​assembly (50) is used to fix the hot spot assembly (30). The snap-fit ​​assembly (50) includes: Heat dissipation fins (51) are arranged in several groups at intervals along the top edge of the inner shell (11). A contact (52) for engaging with the top of the heat rod (33) is fixedly connected to the heat dissipation fins (51). A fixing member (53) is fixedly connected to the side of the heat dissipation fins (51) near the outer shell (12). The fixing member (53) is bolted to the outer shell (12).

2. The heterogeneous double-layer sand box cooling device according to claim 1, characterized in that: Connecting rods (61) are fixedly connected at the four corners of the inner shell (11), and the connecting rods (61) are bolted to the outer shell (12).

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