EVA (Ethylene Vinyl Acetate) container for sand core of cylinder head of motorcycle
By designing an EVA container suitable for the sand core of motorcycle cylinder heads, it adopts multiple follow-up grooves and groove structures, combined with the characteristics of EVA materials, the damage problem during the transportation of the sand core is solved and efficient transportation protection is achieved.
Patent Information
- Application Number
- CN202422557541.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-23
- Publication Date
- 2025-08-22
- Estimated Expiration
- 2034-10-23
AI Technical Summary
During the transportation of motorcycle cylinder head sand core, due to objective reasons such as bumpy road surface and vehicle speed, existing sand core containers are prone to damage, and unreasonable selection of containers will lead to heat damage and cannot meet the use requirements.
An EVA container for motorcycle cylinder head sand core is designed, using multiple shaped grooves and groove structures. Combined with the characteristics of EVA material, it ensures that the sand core is not loose during transportation and avoids heat damage. Through the fitting design of the shaped grooves with the product and the heat resistance of the EVA material, the damage rate is reduced.
It effectively reduces the damage rate of the sand core from 99% to 2%, ensuring safety during transportation and the service life of the container, and avoiding the fall off of the sand core and thermal damage.
Smart Images
Figure CN223250544U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of sand core containers, in particular to an EVA container for sand cores of motorcycle cylinder heads. Background Art
[0002] A key component in the motorcycle cylinder head manufacturing process is the sand core. A sand core is a hollow sand mold created using a core box. Typically used in the casting process, the sand core is placed within the casting box to maintain a defined space as liquid metal is poured into the mold. After casting, the sand core can be easily removed, leaving behind a cavity that becomes the hollow portion of the object. In motorcycle cylinder head manufacturing, sand cores are primarily used for support and positioning, ensuring the cylinder head's shape and dimensional accuracy, while also improving overall quality and performance.
[0003] In low-pressure casting, sand cores made of coated sand are required. Sand cores are extremely easy to damage due to their low strength and loose surface. In addition, because the sand core manufacturing plant is far away from the casting site where the sand cores are used, they must be transported by vehicle. The sand cores of motorcycle cylinder heads are made of coated sand. The condition for converting coated sand into sand cores is thermosetting molding technology. Therefore, the mold needs to be heated to about 260℃ before manufacturing, so the surface temperature of the sand core when it leaves the mold is as high as about 260℃.
[0004] At present, during the transportation process, due to objective reasons such as road bumps and vehicle speed, the sand core is easily damaged; and if the sand core container is not selected properly, it will cause thermal damage to the container and cannot meet the use requirements. Summary of the Invention
[0005] The purpose of the utility model is to provide an EVA container for motorcycle cylinder head sand cores, which solves the problems in the prior art that the sand cores are easily damaged during transportation due to objective reasons such as road bumps and vehicle speed; and if the sand core container is not properly selected, it will cause thermal damage to the container and cannot meet the use requirements.
[0006] To achieve the above-mentioned purpose, the utility model provides an EVA container for a motorcycle cylinder head sand core, comprising a main body frame having a plurality of arranged and distributed conformal grooves, each of the conformal grooves having a first upper groove, a second upper groove, two side grooves and a lower groove.
[0007] Among them, the first upper groove and the second upper groove are respectively arranged at the upper end of the conformal groove, and the first upper groove is located on the left side of the second upper groove, the two side grooves are respectively symmetrically arranged on both sides of the conformal groove, and the lower groove is located below the conformal groove.
[0008] Wherein, the height of the main frame is 360mm.
[0009] Wherein, the length of the main frame is 550mm.
[0010] Wherein, the thickness of the main frame is 90 mm.
[0011] Among them, the first upper groove has a first lower pressing groove, the second upper groove has a second lower pressing groove, the main frame has a conformal groove, the side groove on the right has a third lower pressing groove, and the second lower pressing groove is connected to the third lower pressing groove.
[0012] The utility model discloses an EVA container for motorcycle cylinder head sand cores. During transportation, the product is placed in the conformal groove, and the first upper groove, the second upper groove, the two side grooves and the lower groove are respectively adapted to the product, so that the product can better fit the conformal groove. Since the contour of the product is irregular, the design size of the conformal groove will have a design gap of 2mm with the product to improve fault tolerance. Through the conformal design concept, the product will not cause the sand product to loosen due to excessive joint gap, nor will it cause inconvenience in taking and placing the sand core due to excessively small gap. The distance between each conformal groove is maintained at more than 10mm, so as to ensure its service life and the strength of the main frame. The material of the main frame is EVA material, the melting point of EVA material is 90-180℃, and the density is 975kg / m³. Therefore, the device can avoid the sand core from being damaged and falling off during transportation, and can avoid the sand core from causing thermal damage to the container, thereby meeting the requirements of use. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art.
[0014] Figure 1 It is an overall front view of the utility model.
[0015] Figure 2 It is an overall top view of the utility model.
[0016] 1-main frame, 2-conformal groove, 3-first upper groove, 4-second upper groove, 5-side groove, 6-lower groove, 7-first lower pressing groove, 8-second lower pressing groove, 9-third lower pressing groove, 10-outer shape groove. DETAILED DESCRIPTION
[0017] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, but should not be understood as limiting the present invention.
[0018] See also Figure 1 and Figure 2 ,in, Figure 1 It is the overall front view of the utility model. Figure 2 It is an overall top view of the utility model.
[0019] The utility model provides an EVA container for a motorcycle cylinder head sand core, comprising a main body frame 1, wherein the main body frame 1 is provided with a plurality of arranged and distributed conformal grooves 2, each of the conformal grooves 2 being provided with a first upper groove 3, a second upper groove 4, two side grooves 5 and a lower groove 6; the first upper groove 3 and the second upper groove 4 are respectively arranged at the upper ends of the conformal groove 2, and the first upper groove 3 is located on the left side of the second upper groove 4, the two side grooves 5 are respectively symmetrically arranged on both sides of the conformal groove 2, and the lower groove 6 is located below the conformal groove 2; the height of the main body frame 1 is 360 mm, the length of the main body frame 1 is 550 mm, and the thickness of the main body frame 1 is 90 mm.
[0020] In this embodiment, during transportation, the product is placed in the conformal groove 2, and the first upper groove 3, the second upper groove 4, the two side grooves 5 and the lower groove 6 are respectively adapted to the product, so that the product can better fit the conformal groove 2, and because the contour of the product is irregular, the design size of the conformal groove 2 will have a design gap of 2mm with the product to improve fault tolerance. Through the conformal design idea, the product will not cause the sand product to loosen due to too large a joint gap, nor will it cause the sand core to be inconvenient to take and put due to too small a gap, and the gap between each conformal groove 2 will be smooth. The distance is kept above 10 mm, thereby ensuring its service life and the strength of the main frame 1. The material of the main frame 1 is EVA material, the melting point of EVA material is 90-180 ° C, and the density is 975 kg / m³. Therefore, the device can avoid the sand core from being damaged and falling off during transportation, and can avoid the sand core from causing thermal damage to the container, meeting the requirements of use. The device can reduce the damage rate of the sand core from 99% to 2%. During transportation, the sand cores are placed in the corresponding conformal grooves 2 in turn, and then the main frame 1 is placed in a plastic box, and finally the plastic box is placed in an iron mesh box for easy transportation.
[0021] Furthermore, the first upper groove 3 has a first lower pressing groove 7, the second upper groove 4 has a second lower pressing groove 8, the main frame 1 has an outer shape groove 10, the side groove on the right has a third lower pressing groove 9, and the second lower pressing groove 8 is connected to the third lower pressing groove 9.
[0022] In this embodiment, the arrangement of the first down-pressing groove 7, the second down-pressing groove 8 and the third down-pressing groove can better install and place the sand core product, and the concave shape of the outer shape groove 10 is similar to the outer shape of the sand core, so that the product can fit better in the outer shape groove 10 to avoid being shaken out during transportation.
[0023] The above disclosure is merely one or more preferred embodiments of the present application and is not intended to limit the scope of the present application. A person skilled in the art will understand that all or part of the processes of the above embodiments and equivalent changes made in accordance with the claims of the present application are still within the scope of the present application.
Claims
1. An EVA container for a motorcycle cylinder head sand core, characterized in that: The utility model comprises a main body frame, wherein the main body frame is provided with a plurality of distributed conformal grooves, and each conformal groove is provided with a first upper groove, a second upper groove, two side grooves and a lower groove.
2. The EVA container for motorcycle cylinder head sand core according to claim 1, characterized in that: The first upper groove and the second upper groove are respectively arranged at the upper end of the conformal groove, and the first upper groove is located on the left side of the second upper groove. The two side grooves are respectively symmetrically arranged on both sides of the conformal groove, and the lower groove is located below the conformal groove.
3. The EVA container for motorcycle cylinder head sand core according to claim 2, characterized in that: The height of the main frame is 360 mm.
4. The EVA container for motorcycle cylinder head sand core according to claim 3, characterized in that: The length of the main frame is 550 mm.
5. The EVA container for motorcycle cylinder head sand core according to claim 4, characterized in that: The thickness of the main frame is 90 mm.
6. The EVA container for motorcycle cylinder head sand core according to claim 5, characterized in that: The first upper groove has a first lower pressing groove, the second upper groove has a second lower pressing groove, the main frame has a conformal groove, the side groove on the right has a third lower pressing groove, and the second lower pressing groove is connected to the third lower pressing groove.