High-strength anti-sticking aluminum die-casting die

Abstract

The utility model discloses a high-strength anti-sticking aluminum die-casting die which comprises a die plate and a base plate, die cores are fixedly installed on the side face of the die plate, a cushion block is fixedly installed on the side face of the base plate, die cores are fixedly installed on the side face of the cushion block, a die product is formed between the two die cores in a die-casting mode, and a push plate is arranged on the inner side of the cushion block. An ejector pin is fixedly installed on the side face of the push plate, the ejector pin is inserted into the mold cores, and anti-sticking plating layers are arranged on the contact portions of the two mold cores and a mold product. According to the high-strength anti-sticking aluminum die-casting die, the high-strength anti-sticking coating is prepared on the surface of the aluminum die-casting die through the magnetron sputtering coating technology, the CrTiAlN alloy layer has very high strength and hardness and can resist the erosion effect of aluminum molten metal, the smoothness and completeness of the surface of the die are kept, Cr has the anti-sticking characteristic, the fluidity of the molten metal can be improved, and the anti-sticking performance of the die-casting die is improved. The porosity is reduced, and the product quality is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of aluminum die-casting molds, in particular to a high-strength anti-sticking aluminum die-casting mold. Background Art

[0002] The die casting process is a process in which liquid metal is quickly injected into the mold cavity under high pressure and formed into a casting by cooling and solidification. In this process, the pressure, speed, temperature and time of the liquid metal need to be uniformly controlled. The die casting mold is an important process equipment in die casting production. It plays an extremely important role in whether the production can proceed smoothly and the quality of the casting. In the die casting process, the high-pressure liquid metal has a very large erosion and wear effect on the mold. At the same time, the die casting material will also adhere to the mold, which not only makes it difficult to clean, but also affects the surface quality of the casting. Therefore, it is of great significance to enhance the surface performance of the die casting mold. However, the working temperature of the die casting mold is generally above 600℃, and the general surface treatment has long failed at such a high temperature. Therefore, a high temperature resistant surface treatment method is urgently needed to enhance the surface performance of the die casting mold.

[0003] To this end, the utility model provides a high-strength anti-sticking aluminum die-casting mold to solve the above problems. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model provides a high-strength anti-sticking aluminum die-casting mold to solve the above problems.

[0005] To achieve the above objectives, the utility model is implemented through the following technical solutions: a high-strength anti-sticking aluminum die-casting mold, including a template and a pad, a mold core is fixedly installed on the side of the template, a pad is fixedly installed on the side of the pad, a mold core is fixedly installed on the side of the pad, a mold product is die-casted between the two mold cores, a push plate is provided on the inner side of the pad, an ejector pin is fixedly installed on the side of the push plate, the ejector pin is inserted into the inside of the mold core, and an anti-sticking coating is provided at the contact parts between the two mold cores and the mold product.

[0006] Furthermore, the anti-sticking coating is composed of a pure Cr base layer and a CrTiAlN alloy layer in order from the surface of the mold core to the outside.

[0007] Furthermore, the thickness of the pure Cr base layer is 0.5-2 um.

[0008] Furthermore, the CrTiAlN alloy layer has a thickness of 1-5 um.

[0009] Furthermore, the push plate and the ejector pin are used to push out the die-casting mold product.

[0010] Beneficial Effects

[0011] The utility model provides a high-strength anti-sticking aluminum die-casting mold. Compared with the prior art, it has the following beneficial effects:

[0012] 1. The high-strength anti-stick aluminum die-casting mold uses magnetron sputtering coating technology to prepare a high-strength anti-stick coating on the surface of the aluminum die-casting mold. The CrTiAlN alloy layer has very high strength and hardness, which can resist the erosion of aluminum metal liquid and keep the mold surface smooth and complete. Cr has anti-stick properties, which can increase the fluidity of metal liquid, reduce the generation of porosity, and improve product quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the implementation scheme of the utility model or the technical scheme in the prior art, the drawings required for use in the implementation scheme or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some implementation schemes of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0014] Figure 1 It is a cross-sectional view of the internal structure of the utility model.

[0015] In the figure: 1. Template; 2. Mold core; 3. Cushion block; 4. Pad; 5. Push plate; 6. Ejector pin; 7. Mold product. DETAILED DESCRIPTION

[0016] It should be noted that in the description of the embodiments of the present application, the terms "front, rear", "left, right", "up, down", etc. indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present application. The terms "install", "connect", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be a connection between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0017] The present application is further described in detail below through drawings and examples.

[0018] Reference Figure 1The embodiment of the present application provides a high-strength anti-sticking aluminum die-casting mold, including a template 1 and a pad 4, a mold core 2 is fixedly installed on the side of the template 1, a pad 3 is fixedly installed on the side of the pad 4, a mold core 2 is fixedly installed on the side of the pad 3, a mold product 7 is die-casted between the two mold cores 2, a push plate 5 is provided on the inner side of the pad 3, an ejector pin 6 is fixedly installed on the side of the push plate 5, and the ejector pin 6 is inserted into the inside of the mold core 2, and an anti-sticking coating is provided at the contact parts between the two mold cores 2 and the mold product 7.

[0019] The structure in the mold is uniform except for the mold core, and the other structures in the mold are consistent with the existing mold structure and function.

[0020] The surface of the aluminum die-casting mold core has a high-strength anti-sticking coating; the treatment layer is a pure Cr base layer with a thickness of 0.5-2um and a CrTiAlN alloy layer with a thickness of 1-5um from the surface of the mold core. The hardness of the above treatment layer is 2200-3000HV.

[0021] The coating has very good high temperature resistance. After testing, it has not failed at 900°C. Therefore, in actual use, the film layer can maintain good performance and will not fail due to high ambient temperature.

[0022] This embodiment also discloses a process for preparing an aluminum die-casting mold, and the process is as follows:

[0023] 1. Ultrasonic clean and dry the aluminum die-casting mold core with degreasing solvent, fix it on the fixture, and put it into the vacuum chamber of the magnetron sputtering equipment, and evacuate it to 2-5×10 -5 Torr.

[0024] 2. Introduce argon gas with a purity of 99.99% into the vacuum chamber at a flow rate of 15 to 35 sccm; adjust the equipment parameters to the ion cleaning process, specifically: pulse bias 500 to 600 V, pulse frequency 50 to 250 kHz, pulse width 500 to 1500 ns, two Cr metal target currents 0.3 to 0.5 A, and ion sputtering cleaning time 30 to 60 minutes.

[0025] 3. Reduce the pulse bias voltage to 50-80V, gradually increase the current of the two Cr metal targets to 5-8A, keep other parameters unchanged, and deposit pure Cr element as a base layer for 10-60 minutes.

[0026] 4. Introduce nitrogen gas with a purity of 99.99% into the furnace chamber at a flow rate of 15 to 35 sccm;

[0027] 5. Keep the current of the Cr metal target unchanged, and gradually increase the current of the Ti target and the Al target to 5-8A; and maintain it for 60-360 minutes to deposit the CrTiAlN alloy layer.

[0028] Turn off all target power supplies, close all gas valves, turn off the working current of the magnetron sputtering equipment, and the processing is completed.

[0029] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0030] Although the embodiments of the present application have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present application, and that the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A high-strength anti-sticking aluminum die-casting mold, comprising a mold plate (1) and a backing plate (4), characterized in that: A mold core (2) is fixedly mounted on the side of the template (1), a cushion block (3) is fixedly mounted on the side of the pad (4), a mold core (2) is fixedly mounted on the side of the cushion block (3), a mold product (7) is die-casted between the two mold cores (2), a push plate (5) is arranged on the inner side of the cushion block (3), an ejector pin (6) is fixedly mounted on the side of the push plate (5), and the ejector pin (6) is plugged into the inside of the mold core (2), and an anti-sticking coating is arranged at the contact parts between the two mold cores (2) and the mold product (7).

2. The high-strength anti-sticking aluminum die-casting mold according to claim 1, characterized in that: The anti-sticking coating is composed of a pure Cr base layer and a CrTiAlN alloy layer in order from the surface of the mold core (2) outwards.

3. The high-strength anti-sticking aluminum die-casting mold according to claim 2, characterized in that: The thickness of the pure Cr base layer is 0.5-2 um.

4. The high-strength anti-sticking aluminum die-casting mold according to claim 2, characterized in that: The thickness of the CrTiAlN alloy layer is 1-5 um.

5. The high-strength anti-sticking aluminum die-casting mold according to claim 1, characterized in that: The push plate (5) and the ejector pin (6) are used to push out the die-cast mold product (7).

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