CN106670433A - Structure of water-cooling channel of casting mold - Google Patents

Abstract

The invention discloses a structure of a water-cooling channel of a casting mold, which comprises a plurality of internally threaded water-cooled copper tubes embedded in the mold mounting holes, and the two ends of each internally threaded water-cooled copper tube extend out of the mold and are connected end to end by common pipes to form a cooling circuit The outer peripheral wall of the internally threaded water-cooled copper tube is provided with a spline-shaped multi-tooth structure along the length direction, the inner hole is provided with a threaded structure, and the mold is provided with several spline-shaped multi-tooth structures that match the internally threaded water-cooled copper tube. tooth mounting holes. The multi-tooth shape structure of the present invention increases the surface area of the water-cooling channel, and the internal thread structure of the copper pipe makes the cooling water turbulent and increases the contact area between the water-cooling channel and the cooling water, which makes the heat exchange of the copper water-cooling channel Increased capacity for improved cooling and productivity. In addition, the thermal conductivity of copper is greater, which can improve the cooling effect without increasing the diameter of the pipe, which can ensure the strength of the mold; the copper pipe can be disassembled and replaced, and the corrosion of copper by water is less than that of the mold, which is beneficial to improve the life of the mold.

Description

A structure of water-cooling channels for casting molds

technical field

The invention belongs to the field of moulds, in particular to a structure of a water cooling channel for a casting mould.

Background technique

In aluminum and magnesium alloy casting molds, cooling is a key technology. Enhanced cooling can effectively control the solidification sequence of castings, refine the grain size of castings and improve the production efficiency of castings. Improper cooling can easily lead to casting defects of shrinkage and porosity in the produced blank, and even cause scrapping.

At present, the mold cooling methods mainly include water cooling and air cooling, and water cooling is the most widely used cooling method. Water cooling usually processes water-cooling channels on the mold, and cools the mold through circulating cooling water. Especially in some water-cooled structures (Wang Kaiqing, Li Hongbiao, Zhou Peng, etc. Improved low-pressure water-cooled casting mold, CN204220967U[P]. hole, thereby increasing the cooling area in the area of the wheel flange. Due to the difficulty of processing the curved water channel, and the ordinary water cooling channel is a light hole directly processed on the mold, the cooling water flows in the water channel in a relatively stable state, and the heat exchange between the surface layer and the center of the water flow is insufficient, so the cooling effect is not ideal. Moreover, the cooling water has a certain erosive effect on the mold material, which is not conducive to the life of the mold. When the cooling intensity is insufficient, in the existing water cooling method, the cooling efficiency of the mold is often increased by increasing the aperture of the water cooling channel, which will lead to a decrease in the strength of the mold; if the cooling water flow rate is increased by increasing the water pressure to enhance the cooling efficiency of the mold, It is easy to leak the cooling water at the joint, and the water will react violently with the high-temperature molten metal, which seriously threatens the production safety; in addition, since the aluminum and magnesium alloy casting mold materials are mold steel, the corrosion resistance of the mold steel is average, and the water on the mold Serious corrosion will reduce the service life of the mold.

Based on the above-mentioned existing mold cooling methods, there are existing problems of low cooling effect and impact on the life of the mold. Therefore, it is urgently needed to improve the cooling efficiency of the mold and ensure the strength and life of the mold with a new type of water cooling channel.

Contents of the invention

In view of the above problems, the purpose of the present invention is to provide a casting mold water cooling channel structure. The water-cooling channel structure of the casting mold is to embed copper pipes in the mold, thereby enhancing the cooling effect, reducing the aperture of the water channel to ensure the strength of the mold, reducing the corrosion effect of the water flow on the mold, and increasing the life of the mold.

In order to achieve the above object, the present invention adopts the following technical solutions:

A water-cooling channel structure of a casting mold, including a number of internally threaded water-cooled copper tubes embedded in the mold mounting hole, the two ends of each internally threaded water-cooled copper tube extend to the outside of the mold and are connected end-to-end through ordinary pipes to form a cooling circuit. The outer peripheral wall of the threaded water-cooled copper tube is provided with a spline-shaped multi-tooth structure along the length direction, and the inner hole is provided with a threaded structure. The mold is provided with a number of spline-shaped multi-tooth mounting holes matching the internal threaded water-cooled copper tube.

Further, the two ends of the internally threaded water-cooled copper tube are provided with external threads, and the externally threaded axially fix the internally threaded water-cooled copper tube on the mold through a spring washer and a fixing nut.

Further, both ends of the internally threaded water-cooled copper pipe are connected to common pipes through connecting nuts.

Compared with the prior art, the present invention has the following advantages:

1. Compared with the traditional casting mold water-cooling channel, the present invention uses copper material with higher thermal conductivity to manufacture the water-cooling channel, and the copper-made water-cooling channel has a stronger heat dissipation capability.

2. The multi-tooth shape structure and internal thread structure of the copper tube increase the internal and external areas of the water cooling channel, increase the heat exchange area between the mold and the cooling water, enhance the cooling effect, and prevent the pipe from rotating in the mold. The more the number of teeth, the more The more the surface area increases, the higher the cooling efficiency; at the same time, the internal thread structure of the copper tube makes the cooling water produce a turbulent flow effect, which enhances the heat exchange capacity of the cooling water.

3. The structure of the water-cooling channel greatly enhances the cooling effect, effectively enhances the cooling efficiency of the mold without increasing the radius of the water-cooling channel, and is beneficial to ensure the strength of the mold.

4. The copper pipe can be disassembled and replaced, and the corrosion of water on copper is smaller than that of the mold, which is beneficial to increase the service life of the mold.

Description of drawings

Fig. 1 is a front view of an internally threaded water-cooled copper tube according to an embodiment of the present invention.

Fig. 2 is a left side view of an internally threaded water-cooled copper tube according to an embodiment of the present invention.

Fig. 3 is a schematic diagram of the installation structure of the internally threaded water-cooled copper tube on the mold according to the embodiment of the present invention.

Fig. 4 is an overall connection diagram of the embodiment of the present invention.

Among them: 1 internal thread water-cooled copper pipe, 2 fixed nut, 3 spring washer, 4 mold, 5 connecting nut, 6 ordinary pipe.

detailed description

The present invention will be further described in detail below through the specific examples, the following examples are only descriptive, not restrictive, and cannot limit the protection scope of the present invention with this.

As shown in Figures 1 to 4, the structure of a water-cooled channel of a casting mold includes a number of internally threaded water-cooled copper tubes 1 embedded in the mounting holes of the mold 4, and the two ends of the internally threaded water-cooled copper tubes 1 are provided with External thread, the external thread fixes the internal thread water-cooled copper tube 1 axially on the mold 4 through the spring washer 3 and the fixing nut 3 (see Figure 3), and the outer peripheral wall of the internal thread water-cooled copper tube 1 is along the length direction A spline-shaped multi-tooth structure is provided, and a thread structure is provided in the inner hole (see Fig. 1 and Fig. 2 ), and a number of spline-shaped multi-tooth teeth that match the internally threaded water-cooled copper tube 1 are provided at the mold 4 where the water-cooling channel needs to be arranged. tooth mounting holes. The multi-tooth shape can prevent the inner-threaded water-cooled copper pipe 1 from rotating in the mounting hole, and at the same time increase the surface area of the water-cooling channel.

The two ends of each internally threaded water-cooled copper pipe 1 extend to the outside of the mold 4 and are connected end-to-end with ordinary pipes 6 through connecting nuts 5 to form a cooling circuit, thereby introducing and discharging cooling water. The cooling water functions as the internal thread of the internally threaded water-cooled copper pipe 1 The turbulent flow is generated, the heat transfer coefficient is increased and the contact area with the internally threaded water-cooled copper tube 1 is larger, so the cooling effect of the mold is greatly enhanced. In addition, the enhanced cooling effect is conducive to reducing the aperture of the water cooling channel, thereby ensuring the strength of the mold.

For the mold 4 that requires multiple water-cooling channels, the heads of the molds 4 are connected by ordinary pipes 6, so that multiple internally threaded water-cooled copper pipes 1 form a cooling circuit. As shown in Figure 4 of this embodiment, the three water-cooling channels are connected to form a loop, and the cooling water enters from the upper end of the internally threaded water-cooled copper pipe 1 at the left end, and then enters the next internally threaded water-cooled copper pipe 1 through the external ordinary pipe 6, and then Flow out from the lower end of the rightmost internal threaded water-cooled copper pipe 1 to complete the cooling of the mold 4.

The above-mentioned embodiments of the present invention are only examples for clearly illustrating the present invention, rather than limiting the implementation of the present invention. For those of ordinary skill in the art, other changes or changes in different forms can be made on the basis of the above description. It is not necessary and impossible to exhaustively list all the implementation manners here. All modifications, equivalent replacements and improvements made within the spirit and principles of the present invention shall be included within the protection scope of the claims of the present invention.

Claims (3)

1. a kind of structure of the water-cooling channel of casting mould, it is characterised in that：It is embedded in mould (4) installing hole including some Female thread water-cooled copper (1), each female thread water-cooled copper (1) two ends extend to mould (4) outward and by common pipe head and the tail phase Company forms cooling circuit, and female thread water-cooled copper (1) periphery wall is provided with along its length many toothings of spline-like, endoporus In be provided with helicitic texture, be provided with the mould (4) some multiple tooth with female thread water-cooled copper (1) matches spline-like Installing hole.

2. the structure of the water-cooling channel of casting mould according to claim 1, it is characterised in that：Described female thread water-cooled The two ends of copper pipe (1) are provided with external screw thread, and the external screw thread passes through spring washer (3) and fixing nut (3) by female thread water-cooled Copper pipe (1) is axially fixed on the mould (4).

3. the structure of the water-cooling channel of casting mould according to claim 1, it is characterised in that：The female thread water-cooled copper The two ends of pipe (1) are connected by attaching nut (5) with common pipe (6).