Water channel sand core, product and mold

Abstract

The utility model discloses a water channel sand core, a product and a mold, the water channel sand core comprises a sand core body and a runner rod body, the sand core body is used for forming a mold cavity for forming the product, the sand core body is provided with a connecting area corresponding to a firm area of the product, and the runner rod body is correspondingly matched with the connecting area to form a runner for pouring the product; a product is obtained by molding the cavity formed by the water channel sand core, so that a process rod for forming the product in the runner is positioned in a firm area of the product; the mold is used for producing the product. The sand core has the beneficial effects that the connecting area is arranged on the sand core body and used for forming the firm area on the subsequent formed product, so that the process rod of the product is located on the firm area of the product, and when the subsequent process rod is removed, the process rod and the product can be forcibly separated by adopting external force; and compared with the previous mode of completely cutting and removing one by one, the working efficiency is greatly improved.

Description

Technical Field

[0001] This application relates to the technical field of molds, and in particular to a water channel core, a product and a mold. Background Art

[0002] Sand casting is a casting process method that uses molding sand as the main material to form a mold, and relies on the self-weight and fluidity of the liquid metal to fill the mold under the action of gravity for casting production. Sand casting is one of the most widely used casting methods. Since the molding materials used in sand casting are cheap and easy to obtain, and the casting is simple, it can adapt to single-piece production, batch production and mass production of castings. For a long time, it has been the basic process in casting production.

[0003] After the product is formed by the sand core mold, there will be many process rods on the outside of the product. The process rods are formed by the solidification of the molten metal in the casting product runner. The existing method requires cutting and removing the process rods. Therefore, the method of cutting one by one makes the labor intensity of the staff large, thus affecting the work efficiency; for this reason, a water channel core, a product and a mold are proposed to solve the above technical problems. Utility Model Content

[0004] One of the purposes of this application is to provide a water channel core.

[0005] Another purpose of this application is to provide a product.

[0006] Another purpose of this application is to provide a mold.

[0007] To achieve at least one of the above purposes, the technical solution adopted in this application is: a water channel core, including a core body and a runner rod body. The core body is used to form the cavity of the formed product. A connection area corresponding to the product firm area is provided on the core body. The runner rod body is correspondingly matched with the connection area to form a runner for casting the product.

[0008] Preferably, there are multiple connection areas and they are dispersedly arranged on the core body.

[0009] Preferably, the core body has a weak area and a thickened area, and the thickened area is used to form the connection area.

[0010] Preferably, the core body has a weak area and a thickened area, and the connection area is formed at the connection between the thickened area and the weak area.

[0011] Preferably, the areas where the thickness of the core body in the vertical and horizontal directions is greater than 30% of its overall thickness form the thickened area.

[0012] Preferably, the runner rod body and the connection area are integrally formed.

[0013] Preferably, the runner rod body includes a first rod body and a second rod body. The first rod body is connected to the core body, and the second rod body is partially or fully connected and mated with the first rod body.

[0014] A product is formed by molding through the cavity formed by the above-mentioned water channel core, so that the process rod of the product in the runner is located in the firm area of the product.

[0015] A mold is used to produce the above-mentioned product.

[0016] The mold further includes a half mold body. The product is snap-fitted with the half mold body, so that the vulnerable area of the product forms the firm area.

[0017] Compared with the prior art, the beneficial effects of the present application are as follows:

[0018] In the present utility model, a connection area is provided on the core body, and the connection area is used to form the firm area on the subsequent molded product, so that the process rod of the product is located on the firm area of the product. In this way, when removing the process rod subsequently, an external force (such as hammering / knocking) can be used to forcibly separate the process rod from the product, and compared with the previous method of removing one by one by cutting, the working efficiency will be greatly improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the present utility model.

[0020] Figure 2 It is a schematic diagram when the product of the present utility model is fitted with the half mold body.

[0021] Figure 3 It is an enlarged schematic diagram of the structure at A of the present utility model.

[0022] Figure 4 It is a schematic diagram of the structure of the core body and the product of the present utility model.

[0023] In the figure: 1. Mold; 2. Half mold body; 3. Product; 301. Firm area; 302. Vulnerable area; 303. Process rod; 4. Core body; 401. Thickened area; 402. Weak area; 403. Runner rod body; 4031. First rod body; 4032. Second rod body. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0024] Next, in combination with specific embodiments, the present application will be further described. It should be noted that, on the premise of non-conflict, the following-described embodiments or technical features can be arbitrarily combined to form new embodiments.

[0025] In the description of the present application, it should be noted that for orientation terms, such as the terms "center", "horizontal", "vertical", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., the indicated orientation and positional relationship are based on the orientation or positional relationship shown in the drawings. This is 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 orientation, be constructed and operated in a specific orientation, and should not be construed as limiting the specific protection scope of the present application.

[0026] It should be noted that the terms "first", "second", etc. in the description and claims of the present application are used to distinguish similar objects and do not necessarily have to describe a specific order or sequence.

[0027] In the prior art, the product 3 after sand casting molding will have many process rods 303. It should be known that the process rods 303 are formed by the solidification of the molten metal in the runner of the cast product 3. After molding, the process rods 303 need to be removed. The existing method is to use cutting to remove them. Therefore, the method of cutting one by one makes the labor intensity of the staff large and the work efficiency low. If some of the process rods 303 can be forced to break away by means such as hammering / knocking, the work efficiency will be greatly improved. However, this method has the following deficiencies: when hammering, the process rod 303 is very easy to deform together with the product 3, thereby affecting the quality of the product 3.

[0028] Therefore, the inventor of the present application has developed a water channel sand core, and one of its embodiments is as Figures 1 to 4 shown, including a sand core body 4 and a runner rod body 403. It should be known that the sand core body 4 is used to form the cavity of the molded product 3. A connection area corresponding to the firm area 301 of the product 3 is provided on the sand core body 4. The runner rod body 403 is correspondingly matched with the connection area to form the runner for casting the product 3, and the molten metal in the runner will form the process rod 303 of the product 3 after cooling and solidification.

[0029] It can be understood that the firm area 301, as the name implies, is the relatively firm area on the formed product 3. Therefore, at this time, the formed process rod 303 is located in the firm area 301 of the product 3. In this way, when removing the subsequent process rod 303, an external force (such as hitting / knocking) can be used to forcibly separate the process rod 303 from the product 3, and the working efficiency will be greatly improved compared with the previous cutting removal method.

[0030] Of course, since multiple process rods 303 are required when the product 3 is formed, this is to enable the molten metal to enter the cavity of the formed product 3 more quickly and evenly when falling. Therefore, multiple corresponding connection areas are also required, and the multiple connection areas can be dispersedly arranged on the sand core body 4, so as to ensure that most of the formed process rods 303 can be as corresponding as possible to the firm area 301 of the product 3 in the later stage, and thus most of the subsequent process rods 303 can be quickly removed by knocking.

[0031] In one embodiment of the present application, there are various structural forms of the connection area of the sand core body 4, including but not limited to the following two:

[0032] Structure 1: As shown in (B) of Figure 4 , the sand core body 4 has a weak area 402 and a thickened area 401, and the thickened area 401 is used to form the connection area. It can be understood that the weak area 402 corresponds to the weak part of the sand core body 4, and thus a weak area 302 of the product 3 (i.e., the thickness here is relatively thin) will be formed in the later stage. And the thickened area 401 corresponds to the thickened part of the sand core body 4, and thus a firm area 301 of the product 3 (i.e., the thickness here is relatively thick) will be formed in the later stage.

[0033] Structure 2: As shown in (B) of Figure 4 , the sand core body 4 has a weak area 402 and a thickened area 401 (the same as above), but at this time, the connection part between the thickened area 401 and the weak area 402 is used to form the connection area. It can be understood that as shown in (B) of Figure 4 , a part of the runner rod body 403 at a will be located in the weak area 402 at this time, but another part corresponds to the thickened area 401, that is, the thickened area 401 can play a role in strengthening the overall stability, and thus the process rod 303 on the later product 3 can be removed by knocking.

[0034] It should be noted that as shown in (A) of Figure 4 , it is a structural schematic diagram of the product 3; as shown in Figure 4As shown in (B) thereof, it is a schematic structural view of the core body 4. Thus, it can be seen that the structural shapes of the two are the same, because the product 3 is formed by casting in cooperation with the core body 4 and the sand body. Therefore, the runner rod body 403 and the process rod 303, the core body 4 and the product 3, etc. are corresponding in terms of structure and shape to each other.

[0035] As a further description of the above embodiment, the definition of the thickened area 401 can be: the area where the thickness of the core body 4 in the vertical and horizontal directions is greater than 30% of its overall thickness to form the thickened area 401. That is to say, the thickness of the thickened area should be greater than 30% of its overall thickness both in the horizontal direction and in the vertical direction. For example Figure 4 As shown in (B) thereof, at the b side of the core body 4, although the thickness of the b side in the vertical direction is greater than 30% of the overall thickness, its thickness in the horizontal direction is less than 30% of the overall thickness (relatively thin). Therefore, this area still belongs to the non-thickened area (weak area 402). At the c side of the core body 4, at this time, the thickness of the c side in both the vertical and horizontal directions is greater than 30% of its overall thickness. Therefore, this area is the thickened area 401. Furthermore, the runner rod body 403 can be arranged at the side of the c side or at the top of the c side (i.e., the connection between the thickened area 401 and the weak area 402).

[0036] In one embodiment of the present application, the runner rod body 403 can be integrally formed with the connection area (core body 4), for example, by injection molding. In this way, there will be no gap between the runner rod body 403 and the core body 4. Furthermore, during the later product 3 forming process, the quality of the product 3 will be more stable and reliable.

[0037] It should be known that, as Figure 4 shown, the runner rod body 403 will form a flow channel for the molten metal during the later sand casting process. For the side forming of some products 3, the whole runner rod body 403 can adopt a T-shaped structure (corresponding to the T-shaped flow channel and the T-shaped process rod 303), that is, the runner rod body 403 can be divided into a first rod body 4031 and a second rod body 4032 which are connected to each other. Among them, the first rod body 4031 is connected to the core body 4, and a T-shaped structure is formed between the first rod body 4031 and the second rod body 4032.

[0038] It can be understood that the molten metal will flow from the vertical section (formed by the second rod body 4032) of the T-shaped flow channel into the horizontal section (formed by the first rod body 4031) during pouring. The purpose of this is to ensure that the molten metal can be more evenly and stably distributed to every corner of the mold.

[0039] Therefore, the runner rod body 403 can adopt a T-shaped structure. During the later process of the molten metal entering, the molten metal will flow from the vertical section of the T-shaped runner into the horizontal section. The purpose of this is that the T-shaped structure not only provides enough space for the smooth flow of the molten metal but also plays a certain buffering role during the flow process, reducing the turbulence and bubbles generated by the molten metal during the flow, and thus reducing the gas holes and inclusions in the casting.

[0040] Of course, there are also various specific connection methods between the first rod body 4031 and the second rod body 4032, including but not limited to the following two:

[0041] Method 1: As shown in (B) of Figure 4 , on the right side of the sand core body 4 (i.e., at b), the second rod body 4032 is fully and fittingly connected to the outside of the first rod body 4031. That is, at this time, the amount of molten metal required for the side part of the product 3 is not much, and the corresponding runner is not very large, so that the first rod body 4031 and the second rod body 4032 can be fully fitted.

[0042] Method 2: As shown in (B) of Figure 4 , on the front side of the sand core body 4 (i.e., at c), this also corresponds to the strong area 301 of the product 3. Therefore, there will be a lot of molten metal required, and the corresponding runner will also be very large. However, if the two runners are fully and correspondingly fitted, it will make the impact force of the molten metal greater. Therefore, the second rod body 4032 can be partially installed outside the first rod body 4031. That is, there is partial fitting between the vertical section runner and the horizontal section runner during the subsequent molding, so that the molten metal can enter the molding cavity of the product 3 more gently, thereby improving the molding quality of the subsequent product 3.

[0043] Another aspect of the present application provides a product, that is, the product 3 is formed through the cavity formed by the above-mentioned water channel sand core, so that the process rod 303 of the product 3 formed in the runner is located in the strong area 301 of the product 3, thus facilitating the subsequent removal operation of the process rod 303 (that is, the process rod 303 can be forcibly separated by means of hammering).

[0044] The present application also provides a mold, and this mold 1 is used to produce the above-mentioned product 3.

[0045] Of course, this mold 1 also includes a half mold body 2, and the half mold body 2 does not participate in the molding process of the above-mentioned product 3, but the product 3 is taken out of the sand mold 1 after subsequent casting and molding; as shown in Figure 2 , at this time, the product 3 without removing the process rod 303 can be snap-fitted and placed into the corresponding half mold body 2. As we know, not all the process rods 303 are located within the strong area 301 of the product 3. For example, Figure 3As shown, at this time, the process rod 303 on the product 3 is located in the fragile area 302, and thus the forced separation method cannot be adopted. At this time, under the limiting and supporting action of the semi-mold body 2 on the fragile area 302, the fragile area 302 can also form a firm area 301 at this time, and then the forced separation method can be adopted. For example, we can strike the vertical section of the process rod 303, and then drive the horizontal end of the process rod 303 to rotate and perform forced separation from the product 3.

[0046] The working principle of the present utility model is as follows:

[0047] First, according to the cooperation of the sand core body 4 and the sand body, a cavity for casting the product 3 is formed, and the runner rod body 403 will form a runner for casting the product 3. Subsequently, molten metal is injected into the cavity through multiple runners. After the molten metal cools and solidifies, the product 3 can be formed, as shown in (A) of Figure 4 . The molten metal in the runner solidifies to form the process rod 303 on the product 3, and then the process rod 303 on the product 3 needs to be removed. Then, the product 3 is taken out from the sand casting mold 1 and clamped and placed into the semi-mold body 2. Thus, under the limiting and supporting action of the semi-mold body 2 on the fragile area 302 of the product 3, the fragile area 302 can also form a firm area 301. Finally, the process rod 303 on the product 3 can be struck for forced separation. Of course, there may be process rods 303 located in the fragile area 302 that cannot be forcibly separated, and then they can be removed by cutting. Therefore, compared with the method of removing the process rod 303 one by one by cutting in the prior art, the product 3 formed by the present sand core body 4 can greatly improve the subsequent work efficiency.

[0048] The basic principle, main features and advantages of the present application have been described above. Those skilled in the art of this industry should understand that the present application is not limited by the above embodiments. What is described in the above embodiments and the specification is only the principle of the present application. Without departing from the spirit and scope of the present application, the present application will have various changes and improvements, and these changes and improvements all fall within the scope of the present application claimed. The scope of protection required by the present application is defined by the appended claims and their equivalents.

Claims

1. A water channel core, characterized in that, Comprising: A core body for forming a cavity of a molded product, wherein a connection area corresponding to a product firm area is provided on the core body; and A runner rod body, which is correspondingly matched with the connection area to form a runner for casting the product.

2. The water channel core as described in claim 1, characterized in that: There are multiple connection areas and they are dispersedly arranged on the core body.

3. The water channel core as claimed in claim 1, wherein: The core body has a weak area and a thickened area, and the thickened area is used to form the connection area.

4. The water channel core as claimed in claim 1, wherein: The core body has a weak area and a thickened area, and the connection between the thickened area and the weak area is used to form the connection area.

5. The water channel core according to claim 3 or 4, characterized in that: An area where the thickness of the core body in the vertical and horizontal directions is greater than 30% of its overall thickness forms the thickened area.

6. The water channel core as claimed in claim 1, wherein: The runner rod body and the connection area are integrally formed.

7. The waterway core as claimed in claim 5, wherein: The runner rod body includes a first rod body and a second rod body. The first rod body is connected to the core body, and the second rod body is partially or fully connected and matched with the first rod body.

8. A product, characterized in that: The product is formed through the cavity formed by the water channel core according to any one of claims 1-7, so that the process rod of the product formed in the runner is located in the firm area of the product.

9. A mold, characterized in that: The mold is used to produce the product according to claim 8.

10. The mold according to claim 9, characterized in that: The mold further includes a half mold body, and the product is clamped and matched with the half mold body, so that the vulnerable area of the product forms the firm area.

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