Core box heating structure and core box
By designing oil grooves and oil passage holes on the surface of the mold core, combined with partitions and high-temperature sealing gaskets, the problem of uneven heating in traditional core box heating structures is solved, achieving uniform heating of the mold core and simplifying processing.
Patent Information
- Application Number
- CN202422723711.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-08
- Publication Date
- 2025-11-18
- Estimated Expiration
- 2034-11-08
AI Technical Summary
Traditional core box heating structures have complex heating hole arrangements in the mold core, resulting in uneven heat distribution, making them difficult to process and affecting sand core molding.
An oil groove is designed on the surface of the mold core, and an oil passage hole is set on the oil groove. The oil passage hole is divided into two areas by a partition. High-temperature oil heats the mold core through the oil groove and the oil passage hole. The existing structure is avoided, and a high-temperature sealing gasket and a fixed pressure plate are used to prevent leakage.
This method achieves uniform heating of the mold core, simplifies the processing, avoids uneven heat distribution, and improves the quality of sand core molding.
Smart Images
Figure CN223557195U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the field of core box especially relates to a core box heating structure and core box. BACKGROUND
[0002] At present, under the condition that environmental protection requirement is higher and higher, traditional hot core box and cold core box are gradually replaced by oil heating inorganic core box, and the warm core needs to be cured and formed at 150 DEG C ~ 180 DEG C temperature, so that the warm core box mostly adopts controllable oil heating mode to provide heat, and most of the structures are to process a plurality of cross holes in the mold core, and the high-temperature oil flows through the heating hole to provide heat for the mold core. In addition to arranging the heating hole in the mold core, a thimble hole, a blow nozzle hole and an exhaust hole and other necessary structural features need to be arranged, which causes great limitation in arranging the heating oil hole. In order to uniformly arrange the heating hole, the hole structure will be designed to be relatively complex, which is difficult to process, and the local position cannot be perforated, which causes uneven heating of the mold core and affects the sand core forming and other problems. SUMMARY
[0003] The utility model discloses a kind of core box heating structure and core box, by design oil groove on the surface of mold core, to avoid existing structure on mold core, oil groove is then provided with oil path hole, oil path hole is separated by baffle to form internal loop of oil path hole by high-temperature oil, entire mold core is heated, the complexity of internal oil path avoiding existing structure is reduced, and heating structure is better processed on mold core.
[0004] To solve the above technical problems, the following technical solutions are adopted:
[0005] Firstly, the utility model provides a kind of core box heating structure, including the oil groove of mold core surface, the oil path hole with the preset depth of the mold core inside and the high-temperature sealing pad of sealing oil groove, baffle is arranged in oil path hole, baffle one end extends into oil path hole, with gap with the bottom of oil path hole, baffle separates oil path hole into two regions, and two regions are communicated by the gap.
[0006] Optionally, a plurality of oil path holes are uniformly and interval arranged on the oil groove.
[0007] Optionally, the oil groove is further provided with a fixed pressing plate, and the fixed pressing plate is used to press the high-temperature sealing pad through a fixed screw.
[0008] Optionally, the oil path hole is provided with a baffle clamping groove on both sides of the opening for mounting the baffle, and the baffle clamping groove is used to limit the baffle from falling to the bottom of the oil path hole and limit the rotation of the baffle.
[0009] Optionally, the oil groove is arranged in a curve on the surface of the mold core to cover the entire surface of the mold core by avoiding the original structure on the mold core.
[0010] Optionally, one end of the oil groove is provided with an oil inlet, and the other end is provided with an oil outlet, the high-temperature oil enters the oil groove through the oil inlet, then flows through the oil path hole, and then flows out from the oil outlet.
[0011] Optionally, the material of the high-temperature sealing gasket comprises any one of fluororubber and silicone rubber.
[0012] Optionally, the oil path hole is a cylindrical slot hole, and the bottom of the oil path hole is semispherical.
[0013] In the second aspect, the utility model provides a core box, including upper die and lower die, be equipped with sand shooting hole on the upper die, be equipped with thimble hole and exhaust hole on the lower die, its characterized in being equipped with the core box heating structure of any one of first aspect on the upper die and the lower die.
[0014] Compared with the prior art, the application achieves the following beneficial effects:
[0015] 1、 the utility model discloses a oil groove is set up on the surface of die, and then the oil path hole is set up to the inside direction of die on the oil groove, and the setting of the oil groove can determine the direction of the oil path hole, and the oil groove is set on the surface of die, and the oil groove is designed on the surface of die, which can better avoid other hole positions on the die, and the oil path hole is opened on the oil groove to the inside of die, without considering avoiding other hole positions, and the high-temperature oil enters the oil path hole through the oil groove, and the oil path hole is divided into two areas by the partition, and the high-temperature oil enters from one area and then passes through the gap at the bottom of the oil path hole to the second area, so that the inside of die is heated to the required temperature.
[0016] 2、 the utility model discloses that the oil groove is designed on the surface of die, and the existing hole position on the die is avoided, and a plurality of same oil path holes are uniformly and interval distributed on the oil groove, a partition is arranged in each oil path hole, the high-temperature oil passes through the whole oil path hole and sequentially passes through all oil path holes, so that the inside of the whole die is uniformly heated, and the high-temperature sealing gasket is pressed tightly by the pressing plate, so that the high-temperature sealing gasket does not deviate, and the high-temperature oil is prevented from leaking. BRIEF DESCRIPTION OF DRAWINGS
[0017] Figure 1 It is the distribution schematic view of the oil groove on the surface of die in the embodiment of the utility model;
[0018] Figure 2 It is the cross-sectional structure schematic view of the oil path hole in the embodiment of the utility model;
[0019] Figure 3 It is the partition slot structure schematic view in the embodiment of the utility model;
[0020] Figure 4 It is the side perspective schematic view of the distribution of the oil path hole in the die in the embodiment of the utility model;
[0021] Figure 5It is the distribution diagram of the existing structure of the mold core in the embodiment of the utility model.
[0022] Mark explanation:
[0023] 1, upper die core;2, lower die core;3, sand core;4, ejector pin hole;5, exhaust hole;6, sand injection hole;7, die core;8, high temperature sealing pad;9, fixed pressing plate;10, fixed screw;11, partition;12, oil groove;13, oil passage hole;14, partition slot. Specific implementation
[0024] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, not all the embodiments. The description of the at least one exemplary embodiment is actually only illustrative, not as any limitation on the present application and its application or use.
[0025] Embodiment 1
[0026] As Figures 1-2 shown, the present embodiment provides a core box heating structure, including the oil groove 12 of the die core 7 surface, the oil passage hole 13 with a preset depth in the die core 7 and the high temperature sealing pad 8 sealing the oil groove 12, the oil passage hole 13 is provided with a partition 11, one end of the partition 11 extends into the oil passage hole 13, and the bottom of the oil passage hole 13 has a gap, the partition 11 divides the oil passage hole 13 into two areas, and the two areas are communicated through the gap.
[0027] The width of the partition 11 is greater than or equal to the diameter of the oil passage hole 13, the partition 11 does not contact the bottom of the oil passage hole 13, the partition 11 divides the oil passage hole 13 into two semicircular areas, and the two semicircular areas are communicated through the gap between the bottom of the oil passage hole 13 and the partition 11.
[0028] In use, after the high temperature oil enters from one end of the oil groove 12, it flows into one semicircular area of the oil passage hole 13, and then flows to the bottom of the oil passage hole 13, and then enters the other semicircular area through the gap between the oil passage hole 13 and the partition 11, so as to heat the inside of the die core 7, and the high temperature oil flows out of the oil passage hole 13, and then enters the next oil passage hole 13 through the oil groove 12, until it flows out of the other end of the oil groove 13, so as to heat the inside of the entire die core 7.
[0029] The oil groove 12 is designed on the surface of the die core 7, which is more convenient to avoid the original structure and more convenient to process, the oil passage hole 13 is provided in the oil groove 12 to the inside of the die core 7, the oil passage hole 13 does not penetrate the entire die core 7, the partition 11 divides the oil passage hole 13 into two, forming a loop through which the high temperature oil passes, and the oil groove 12 is communicated with each oil passage hole 13, so as to heat the entire die core 7 to the required temperature.
[0030] Example 2
[0031] like Figures 1-4 As shown, this embodiment provides a core box heating structure based on embodiment 1. The difference from embodiment 1 is that multiple oil passage holes 13 are evenly spaced on the oil tank 12. Each oil passage hole 13 is the same size, and a partition 11 is provided in each oil passage hole 13 to divide the oil passage hole 13 into two areas.
[0032] The oil tank includes a first oil tank and a second oil tank. The first oil tank is used to install a high-temperature sealing gasket and fix the pressure plate. The second oil tank is located in the middle of the first oil tank and is deeper than the first oil tank to allow high-temperature oil to pass through. The oil passage hole 13 can be a cylindrical slot with a circular opening tangent to both sides of the first oil tank. The bottom is hemispherical. There are partition slots 14 on both sides of the opening. The width of the end of the partition 11 that extends into the oil passage hole 13 is the same as or slightly larger than the diameter of the oil passage hole 13, so that it can fit tightly against the inner wall of the oil passage hole 13. The width of the other end of the partition 11 is longer than the end that extends into the oil passage hole 13, and it is locked in the partition slot 14, which restricts the rotation of the partition 11 and restricts the partition 11 from falling towards the oil passage hole 13.
[0033] One end of the partition 11 extends into the oil passage hole 13; the other end is stuck in the partition slot 14, and the end is in close contact with the high temperature sealing gasket 8. The high temperature sealing gasket 8 prevents high temperature oil from flowing directly through the opening of the oil passage hole 13 without entering the oil passage hole 13.
[0034] The oil groove 12 is curved. For mold cores of different sizes, the oil groove 12 can be designed as an S-shape, a U-shape, or other irregular curves, so that it is distributed on the entire surface of the mold core 7. The purpose of the curved oil groove 12 is to avoid the original hole structure on the mold core 7 and to cover the entire surface of the mold core 7.
[0035] One end of the oil tank 12 is provided with an oil inlet, and the other end is provided with an oil outlet. High-temperature oil enters the oil tank 12 from the oil inlet, and then passes through the oil passage hole 13 on the oil tank 12 in sequence, and finally flows out from the oil outlet, so as to realize the heating of the entire mold core 7 by the high-temperature oil.
[0036] The oil tank 12 is sealed by a high-temperature sealing gasket 8, leaving only an oil inlet and an oil outlet. The high-temperature sealing gasket 8 is made of a high-temperature resistant material, such as fluororubber or silicone rubber. A fixing plate 9 is also provided on the upper surface of the high-temperature sealing gasket 8. The fixing plate 9 presses the high-temperature sealing gasket 8 tightly with fixing screws to prevent the high-temperature sealing gasket 8 from deforming and moving under high-temperature conditions, thus preventing leakage of high-temperature oil.
[0037] Example 3
[0038] like Figures 1 to 5As shown, a core box comprises an upper die core 1 and a lower die core 2, the upper die core 1 is provided with a plurality of sand shooting holes 6, the sand shooting holes 6 penetrate the upper die core 1, the lower die core 2 is provided with a ejector pin hole 4 and a vent hole 5, the ejector pin hole 4 and the vent hole penetrate the entire lower die core 2.
[0039] The upper die core 1 and the lower die core 2 are provided with the core box heating structure as shown in Embodiment 1 or Embodiment 2.
[0040] The oil passage holes 13 of the core box heating structure are parallel to each other inside the die core and parallel to other existing holes on the die core, and do not interfere with each other.
[0041] In the process of processing the core box heating structure, first, the specific direction of the oil groove 12 is designed on the die core, the oil groove 12 avoids some sand shooting holes 6, ejector pin holes 4 and vent holes 5 on the die core by bending direction, the total length of the oil groove 12 is determined, the oil groove 12 is processed by milling, the depth of the oil groove 12 is designed according to the thickness of the die core, to ensure that the temperature of the high-temperature oil can be transmitted to the other side of the die core to achieve the required temperature, the number of oil passage holes 13 is determined, the interval of the two oil passage holes 13 is determined, the oil passage hole 13 can be a cylindrical notch with a circular opening tangent to the two sides of the oil groove 12, and the bottom is semispherical.
[0042] The above only describes the preferred embodiments of the present application, it should be noted that for those skilled in the art, without departing from the technical principles of the present application, a number of improvements and modifications can be made, these improvements and modifications should also be considered as the protection scope of the present application.
Claims
1. A core box heating structure, characterized by, The high-temperature sealing gasket comprises an oil groove on a die core surface, an oil passage hole with a preset depth in the die core, and a sealing oil groove, a partition plate is arranged in the oil passage hole, one end of the partition plate extends into the oil passage hole and has a gap with the bottom of the oil passage hole, the partition plate divides the oil passage hole into two areas, and the two areas are communicated through the gap.
2. The core box heating structure of claim 1, wherein, A plurality of oil passage holes are uniformly and spacedly arranged on the oil groove.
3. The core box heating structure of claim 1, wherein, A fixing pressing plate is further arranged on the oil groove, and the fixing pressing plate presses the high-temperature sealing gasket through fixing screws.
4. The core box heating structure of claim 1, wherein, Partition plate clamping grooves for mounting the partition plate are arranged on both sides of the opening of the oil passage hole, the partition plate clamping grooves limit the falling of the partition plate to the bottom of the oil passage hole and limit the rotation of the partition plate.
5. The core box heating structure of claim 1, wherein, The oil groove is arranged in a curve on the surface of the die core to cover the whole surface of the die core by avoiding the original structure on the die core.
6. The core box heating structure of claim 1, wherein, One end of the oil groove is provided with an oil inlet, and the other end is provided with an oil outlet, high-temperature oil enters the oil groove through the oil inlet, then flows through the oil passage hole, and then flows out from the oil outlet.
7. The core box heating structure of claim 1, wherein The material of the high-temperature sealing gasket comprises any one of fluorine rubber and silicone rubber.
8. The core box heating structure of claim 1, wherein, The oil passage hole is a cylindrical slot hole, and the bottom of the oil passage hole is semispherical.
9. A core box comprising an upper core print and a lower core print, the upper core print being provided with a shot hole, and the lower core print being provided with a pin hole and a vent hole, characterized in that, The upper die core and the lower die core are provided with the core box heating structure according to any one of claims 1-8.