Air outlet protection device for sand mold casting loam core
By designing a protective sleeve in the sand casting core venting protection device, the problems of porosity and choking caused by molten iron backflow were solved, achieving smooth gas discharge and improving casting quality, thus extending the service life of the core.
Patent Information
- Application Number
- CN202520088160.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-15
- Publication Date
- 2026-01-02
- Estimated Expiration
- 2035-01-15
AI Technical Summary
In the existing sand casting core process, molten iron can easily overflow from the riser and the body's venting hole and backflow into the core's venting hole, causing venting obstruction, resulting in casting defects such as porosity and flameout, which affects the quality of the casting.
Design a sand casting core venting protection device, including an upper box and a lower box. The upper box is provided with a vent hole, and a protective sleeve is installed on the top. The protective sleeve is bonded above the vent hole with adhesive, so that the vent hole extends above the surface of the upper box, forming a smooth gas discharge channel.
It reduces internal defects in castings caused by gas retention, improves product qualification rate, reduces cost increase, improves casting quality, prevents molten iron backflow, ensures smooth gas venting of the core, and extends the service life of the core.
Smart Images
Figure CN223748491U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to sand casting exhaust method technical field especially relates to a sand casting core exhaust protection device. BACKGROUND
[0002] With the development of economic society, the requirement of domestic casting quality is higher and higher. Therefore, it forces foundry to increase the investment of improving casting quality innovation. Sand casting as a traditional and widely used metal forming process, in many industrial fields, such as automobile manufacturing, mechanical equipment, aerospace, etc. have a key position. In the sand casting process, the core plays a very important role, it is mainly used to form the complex cavity structure inside the casting, like engine cylinder block water jacket, various pipe inner cavity, etc. directly affect the final size precision, internal quality and overall performance of the casting.
[0003] The existing sand casting core in the process of exhaust, molten iron is easy to overflow from the riser, the body exhaust eye back to the core exhaust eye, and then lead to the core exhaust obstruction, so as to cause casting porosity, choking fire and other casting defects, affect the casting quality of cast iron. UTILITY MODEL CONTENTS
[0004] The utility model discloses a sand casting core exhaust protection device, which solves the problem of the prior art that molten iron is easy to overflow from the riser, the body exhaust eye back to the core exhaust eye, and then lead to the core exhaust obstruction, so as to cause casting porosity, choking fire and other casting defects, affect the casting quality of cast iron.
[0005] In order to realize the above-mentioned purpose, the utility model adopts the following technical scheme: a sand casting core exhaust protection device, including upper box and lower box, the inside of upper box is provided with a plurality of exhaust eye, the top of upper box is installed with a plurality of protective sheaths, the protective sheath sets up at the top of exhaust eye.
[0006] Preferably, the inside of lower box is provided with core, and the inside of lower box is provided with casting.
[0007] Preferably, the upper box is arranged at the top of the lower box.
[0008] Preferably, the diameter of the protective sleeve is 90mm, and the height of the protective sleeve is 50mm.
[0009] Preferably, the diameter of the upper slot of the protective sleeve is 40mm, and the diameter of the lower slot of the protective sleeve is 50mm.
[0010] Compared with the prior art, the utility model has the advantages and positive effects that,
[0011] In this invention, the protective sleeve is bonded to the top of the vent hole using an adhesive, causing the vent hole to extend above the surface of the upper casing. This creates a smooth channel for gas discharge, reducing the likelihood of internal defects in the casting such as porosity and backfiring caused by gas stagnation. This improves the product qualification rate, reduces cost increases due to casting defects, and enhances the quality of cast iron castings. Simultaneously, it prevents molten iron from overflowing from the vent hole and backflowing into the core vent hole, thus ensuring unobstructed venting of the core, maintaining the normal progress of the casting process, and extending the service life of the core. Attached Figure Description
[0012] Figure 1 This utility model provides a three-dimensional structural schematic diagram of a sand casting core gas venting protection device;
[0013] Figure 2 This utility model provides a side view of the structure of a sand casting core venting protection device.
[0014] Figure 3 This utility model provides a partial structural schematic diagram of a sand casting core gas venting protection device;
[0015] Figure 4 This utility model presents a partial cross-sectional structural diagram of a sand casting core gas venting protection device.
[0016] Legend: 1. Vent hole; 2. Protective sleeve; 3. Upper box; 4. Casting; 5. Lower box; 6. Clay core. Detailed Implementation
[0017] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.
[0018] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed in the following specification.
[0019] Example 1: As Figures 1-4As shown, the utility model provides a technical scheme: a sand casting core gas outlet protection device, including upper box 3 and lower box 5, the inside of upper box 3 is opened with a plurality of gas eyes 1, a plurality of protective sheaths 2 are installed to the top of upper box 3, the protective sheath 2 is set at the top of gas eye 1, the inside of lower box 5 is provided with core 6, the inside of lower box 5 is provided with casting 4, upper box 3 is set at the top of lower box 5, the diameter of protective sheath 2 is 90mm, the height of protective sheath 2 is 50mm, the diameter of the upper slot of protective sheath 2 is 40mm, the diameter of the lower slot of protective sheath 2 is 50mm.
[0020] In the embodiment, before the upper box 3 and the lower box 5 are combined, the protective sheath 2 is bonded above the gas eye 1 by the adhesive, the gas eye 1 is extended above the surface of the upper box 3, a smooth channel is created for gas discharge, the internal defects such as gas holes and fire choking of the casting 4 caused by gas retention are reduced, the product qualification rate is improved, the cost increase caused by casting defects is reduced, the casting quality of cast iron is improved, and the overflow of molten iron from the gas eye 1 is prevented from backflowing to the gas eye of the core 6, the core 6 gas outlet is blocked, the smoothness of the core 6 gas outlet is ensured, the normal casting process is maintained, and the service life of the core 6 is prolonged.
[0021] The working principle of the embodiment is as follows: in use, first, before the upper box 3 and the lower box 5 are combined, the protective sheath 2 is bonded above the gas eye 1 by the adhesive, the gas eye 1 is extended above the surface of the upper box 3, a smooth channel is created for gas discharge, the overflow of molten iron from the gas eye 1 is prevented from backflowing to the gas eye of the core 6, the core 6 gas outlet is blocked, the smoothness of the core 6 gas outlet is ensured, the normal casting process is maintained, and the service life of the core 6 is prolonged.
[0022] The above is only a preferred embodiment of the utility model, and is not intended to limit the utility model in other forms. Any skilled person in the art can modify or change the above disclosed technology content to equivalent embodiments applied to other fields. However, any simple modification, equivalent change and modification of the above embodiments based on the technical essence of the utility model still fall within the protection scope of the utility model technical scheme.
Claims
1. A sand-choφing core gas-venting protection device, characterized by: Including upper box (3) and lower box (5), the inside of the upper box (3) is provided with a plurality of air outlet (1), the top of the upper box (3) is provided with a plurality of protective sleeve (2), the protective sleeve (2) is arranged on the top of the air outlet (1).
2. The sand-choφing core gas-venting protection device of claim 1, wherein: The inside of the lower box (5) is provided with a core (6), and the inside of the lower box (5) is provided with a casting (4).
3. The sand-choφing core gas-venting protection device of claim 1, wherein: The upper box (3) is arranged on the top of the lower box (5).
4. The sand-choφing vent guard of claim 1 wherein: The diameter of the protective sleeve (2) is 90mm, and the height of the protective sleeve (2) is 50mm.
5. The sand-choφing vent guard of claim 1 wherein: The diameter of the notch in the protective sleeve (2) is 40mm, and the diameter of the notch in the protective sleeve (2) is 50mm.