Hot air knife for wax mould welding

Abstract

The utility model provides a hot air knife for wax mould welding, which comprises a body and a knife head, an air inlet channel is arranged in the body, an air distribution channel is arranged in the knife head, and the air distribution channel is provided with at least two air outlets. The air inlet channel of the body is communicated with the air distribution channel in the tool bit, so that high-temperature air enters the air distribution channel through the air inlet channel and then is blown out from the air outlet. According to the hot air knife for wax mould welding, provided by the utility model, the unsmooth surface of the welding position of a wax mould can be subjected to hot melting treatment, so that the surface of the welding position is smooth, the investment casting effect is ensured, turbulent flow and bubbles are avoided, and the quality of a poured product is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of investment casting, in particular to a hot air knife for wax pattern welding. Background Art

[0002] Investment casting, also known as lost wax casting, includes processes such as wax pressing, wax trimming, tree assembling, slurry dipping, wax melting, metal liquid casting, and post-treatment. Lost wax casting is to make a wax pattern of the part to be cast with wax, and then coat the wax pattern with slurry, which is the clay mold. After the clay mold is dried, it is put into hot water to melt the internal wax pattern. The clay mold with the melted wax pattern is taken out and baked into a ceramic mold. Once baked. Generally, a pouring gate is left when making the clay mold, and then molten metal is poured into the pouring gate. After cooling, the required part is made.

[0003] With the progress of technology, more and more wax patterns used in investment casting are replaced by wax pattern trees. A wax pattern tree is to weld several wax patterns on the same wax rod, and then pour metal solution into the casting space formed by melting wax through the pouring gate formed by the wax rod.

[0004] In the process of welding the wax pattern to the wax rod, the connection position between the wax pattern and the wax rod is usually bonded after melting, and a ring-shaped protrusion is formed at the connection position after bonding. During the casting process, this ring-shaped protrusion will cause the metal solution to not fully enter and will play a role in disturbing the flow. After bubbles enter the solution, it will cause the casting to fail.

[0005] Therefore, after welding the wax pattern to the wax rod, it is necessary to repair the welding position. Since many wax patterns are usually welded on one wax rod and the distance between the wax patterns is very close, it is very difficult to repair the welding position manually. Further, even if repaired manually by workers, it is very difficult to ensure that the surface of the welding position is smooth and flat.

[0006] It can be seen that the repair work of the welding position of the wax pattern tree used in investment casting is a difficult problem faced by this field. Summary of the Invention

[0007] The technical problem to be solved by the embodiments of the utility model is to provide a hot air knife for wax pattern welding, which repairs the welding position of the wax pattern by means of hot air, and solves the repair problem of wax pattern welding.

[0008] To solve the above technical problem, the utility model provides a hot air knife for wax pattern welding, including a body and a cutter head. An air inlet channel is arranged in the body, and an air distribution channel is arranged in the cutter head, and the air distribution channel has at least two air outlets; the air inlet channel in the body is communicated with the air distribution channel in the cutter head, so that high-temperature gas enters the air distribution channel through the air inlet channel and then blows out from the air outlets.

[0009] The cutter head is provided with at least two, and there is a notch between the two cutter heads. The position of the notch is opposite to that of the body, and the two cutter heads form a molten wax area into which the wax mold can enter.

[0010] The air outlets on the cutter head are evenly arranged around the circumferential direction of the molten wax area, and the directions of the air outlets are arranged in a clockwise or counterclockwise direction.

[0011] The air inlet channel and the air distribution channel are connected to form a T-shaped gas path structure.

[0012] The body and the cutter head are located on two parallel levels.

[0013] The body avoids the longitudinal space corresponding to the molten wax area.

[0014] The hot air knife for wax mold welding provided by the utility model can perform hot melting treatment on the uneven surface of the wax mold welding position, make the surface of the welding position smooth, thereby ensuring the effect of investment casting, avoiding flow disturbance and bubbles, and ensuring the quality of the cast product. Description of the Drawings

[0015] Figure 1 It is a three-dimensional structure schematic diagram of the hot air knife for wax mold welding.

[0016] Figure 2 It is a three-dimensional structure schematic diagram of the hot air knife for wax mold welding.

[0017] Figure 3 It is a top view structure schematic diagram of the hot air knife for wax mold welding.

[0018] Figure 4 It is a side view structure schematic diagram of the hot air knife for wax mold welding. Detailed Embodiments

[0019] In order to make the above objects, features and advantages of the utility model more obvious and understandable, the following detailed description of the specific embodiments of the utility model is made with reference to the accompanying drawings. Many specific details are set forth in the following description in order to fully understand the utility model. However, the utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the utility model. Therefore, the utility model is not limited by the specific embodiments disclosed below.

[0020] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there can also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0021] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field to which this utility model belongs. The terms used in the specification of this utility model are only for the purpose of describing specific embodiments and are not intended to limit this utility model. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0022] As Figures 1-4 shown, this utility model provides a hot air knife for wax mold welding, which includes a body 1 and a knife head 2. An air inlet passage is provided in the body 1, and an air distribution passage is provided in the knife head 2, and the air distribution passage has at least two air outlet openings 21; the air inlet passage of the body 1 is communicated with the air distribution passage in the knife head so that high-temperature gas enters the air distribution passage through the air inlet passage and then blows out from the air outlet openings.

[0023] As Figure 3 shown, at least two knife heads 2 are provided, and a notch is provided between the two knife heads 2. The position of the notch is opposite to the position of the body, and the two knife heads 2 form a molten wax area into which the wax mold can enter relatively.

[0024] The air outlet openings on the knife head 2 are evenly arranged around the circumferential direction of the molten wax area, and the directions of the air outlet openings 21 are arranged in a clockwise or counterclockwise direction. Whether it is in the clockwise direction or the counterclockwise direction: when all the air outlet openings are in the clockwise direction, an annular heating air flow is formed around the welding part of the wax mold, which can blow and heat the surface of the wax mold, promote the melting of the wax mold, and make the wax mold at the welding part flat; when all the air outlet openings are in the counterclockwise direction, its function is similar to that of the clockwise arrangement.

[0025] The air inlet passage and the air distribution passage are connected to form a T-shaped gas path structure.

[0026] The body 1 and the knife head 2 are located on two parallel levels.

[0027] The body 1 avoids the longitudinal space corresponding to the molten wax area, so as to keep a certain distance from the wax mold and avoid affecting the wax mold welding process.

[0028] The hot air knife for wax mold welding provided by this utility model can perform hot melting treatment on the uneven surface at the wax mold welding position, make the surface at the welding position smooth, thereby ensuring the effect of investment casting, avoiding flow disturbance and bubbles, and guaranteeing the quality of the cast product.

[0029] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the various technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as falling within the scope described in this specification.

[0030] The above-described embodiments merely represent several implementation manners of the present utility model. The description thereof is relatively specific and detailed, but it should not be construed as a limitation on the scope of the utility model patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present utility model, several modifications and improvements can still be made, and these all belong to the protection scope of the present utility model. Therefore, the protection scope of the present utility model patent shall be subject to the appended claims.

Claims

1. Hot air knife for wax pattern welding, characterized in that: It includes a body and a cutter head. The body is provided with an air inlet channel, the cutter head is provided with an air separation channel, and the air separation channel has at least two air outlets. The air inlet channel of the body is connected with the air separation channel in the cutter head so that high-temperature gas enters the air separation channel through the air inlet channel and is then blown out from the air outlet.

2. The hot air knife for wax pattern welding according to claim 1, characterized in that: There are at least two cutter heads, and a notch is provided between the two cutter heads. The position of the notch is opposite to that of the body, and the two cutter heads relatively form a wax melting area into which the wax model can enter.

3. The hot air knife for wax pattern welding according to claim 2, characterized in that: The air outlets on the cutter head are evenly arranged around the circumference of the wax melting area, and the directions of the air outlets are arranged in a clockwise or counterclockwise direction.

4. The hot air knife for wax pattern welding according to claim 1, characterized in that: The air intake channel is connected with the air distribution channel to form a T-shaped air path structure.

5. The hot air knife for wax pattern welding according to claim 1, characterized in that: The body and the cutter head are located on two parallel planes.

6. The hot air knife for wax pattern welding according to claim 2, characterized in that: The main body avoids the longitudinal space corresponding to the wax melting area.

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