Box closing guide mechanism for casting production

Abstract

A box closing guide mechanism for casting production comprises an upper sand box and a lower sand box, the top and the bottom of the upper sand box are coated with plastic films, the top and the bottom of the lower sand box are coated with plastic films, and the box closing guide mechanism is characterized in that a guide plate is arranged on the side wall of the lower sand box in the box closing direction; the distance between the side wall, close to the lower sand box, of the guide plate and the outer side wall of the lower sand box is L, the thickness of the plastic film is L1, and L is larger than L1; an upper positioning plate is fixed on the side wall of the upper sand box, a guide post is fixed on the lower part of the upper positioning plate, a lower positioning plate is fixed on the side wall of the lower sand box, a guide hole is formed in the upper surface of the lower positioning plate, and the guide post is matched with the guide hole. When the box closing operation is carried out, the plastic film is not rubbed, so that the plastic film is not damaged, the vacuum degree of the sand box is ensured, and the normal operation of sand casting is ensured.

Description

Technical Field

[0001] This utility model relates to the field of casting production technology, and more specifically, to a box-closing guide mechanism for casting production. Background Technology

[0002] Currently, sand casting in workshops typically involves covering the surface of ordinary sand molds with a smooth and uniform plastic film at the same temperature. Specifically, the plastic film is cut to size, cleaned, and laid flat to cover the surfaces of the upper and lower sand molds. Then, a vacuum is drawn inside the upper and lower sand molds. The purpose of this operation is to make the molding sand in the sand box more compact, which facilitates molding, thereby improving the surface quality of the castings and increasing production efficiency.

[0003] Chinese patent CN213350731 discloses a "combination guide cone," which uses a metal conical rod to position and orient the molding sand in the lower sand box during the combination process. However, in actual operation, the guide cone and blind hole are located on the upper and lower surfaces of the sand box, which can damage the plastic film, disrupt the vacuum conditions, and cause the molding sand inside the sand box to scatter, thus rendering it impractical. Furthermore, during the combination process, the corner plate directly contacts and rubs against the side wall of the upper sand box, which can also easily damage the plastic film. These are the shortcomings of the existing technology. Utility Model Content

[0004] The purpose of this utility model is to solve the problems mentioned in the background art above, and then to propose a box-closing guide mechanism for casting production.

[0005] The technical solution adopted by this utility model to solve its technical problem is: a casting production box closing and guiding mechanism, including an upper sand box and a lower sand box. The top and bottom of the upper sand box are covered with plastic film, and the top and bottom of the lower sand box are also covered with plastic film. A guide plate is provided on the side wall of the lower sand box along the direction of box closing. The distance between the side wall of the guide plate near the lower sand box and the outer side wall of the lower sand box is L, and the thickness of the plastic film is L1, where L > L1. An upper positioning plate is fixed on the side wall of the upper sand box, and a guide post is fixed on the lower part of the upper positioning plate. A lower positioning plate is fixed on the side wall of the lower sand box, and a guide hole is provided on the upper surface of the lower positioning plate. The guide post matches the guide hole.

[0006] A further improvement of this utility model is that the guide post is a circular column, the guide hole is a cylindrical hole, and a conical hole is provided at the upper part of the cylindrical hole.

[0007] A further improvement of this utility model is that the upper end of the guide plate is a free end, the lower end of the guide plate is fixed to one end of the connecting plate, and the other end of the connecting plate is fixed to the outer side wall of the lower sand box, and the guide plate and the connecting plate form an "L" shape.

[0008] A further improvement of this utility model is that there are four guide plates, which are respectively arranged on the four side walls of the lower sand box.

[0009] A further improvement of this utility model is that each side wall of the upper sand box is provided with two upper positioning plates, which are symmetrically arranged on both sides of the guide plate; each side wall of the lower sand box is provided with two lower positioning plates, which are symmetrically arranged on both sides of the guide plate.

[0010] Compared with the prior art, the beneficial effects of this utility model are:

[0011] 1. In this utility model, a guide plate is provided on the side wall of the lower sand box along the direction of closing the box. The distance between the guide plate near the side wall of the lower sand box and the outer side wall of the lower sand box is L, and the thickness of the plastic film is L1, wherein L > L1. The guide plate plays a preliminary guiding role in the movement of the upper sand box. At the same time, there is a distance L between the guide plate and the side wall of the lower sand box. When the box is closed, there will be no friction with the plastic film, so the plastic film will not be damaged, thereby ensuring the vacuum degree of the sand box and ensuring the normal progress of sand casting.

[0012] 2. In this utility model, an upper positioning plate is fixed to the side wall of the upper sand box, and a guide post is fixed to the lower part of the upper positioning plate. A lower positioning plate is fixed to the side wall of the lower sand box, and a guide hole is provided on the upper surface of the lower positioning plate. The guide post matches the guide hole. Since both the guide hole and the guide post are located on the side wall of the sand box, the plastic film will not be damaged during the closing process, ensuring vacuum conditions and possessing strong application and promotion value. Attached Figure Description

[0013] Figure 1 This is a front view structural diagram of a specific embodiment of the present invention;

[0014] Figure 2 for Figure 1 A top-view structural diagram;

[0015] Figure 3 for Figure 1 Enlarged view of the A-section structure;

[0016] Figure 4 This is a schematic diagram of the structure of the lower positioning plate of this utility model.

[0017] Figure 5 This is a structural diagram of the guide plate and connecting plate.

[0018] Wherein: 1 is the upper positioning plate, 2 is the guide post, 3 is the upper sand box, 4 is the plastic film, 5 is the lower sand box, 6 is the lower positioning plate, 61 is the guide hole, 62 is the conical hole, 7 is the guide plate, and 8 is the connecting plate. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present utility model, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model. The present utility model will be further described with reference to the accompanying drawings and embodiments:

[0020] like Figure 1-5 As shown, a sand box closing and guiding mechanism for casting production includes an upper sand box 3 and a lower sand box 5. The top and bottom of the upper sand box 3 and the lower sand box 5 are both covered with plastic film 4. In actual production, the four edges of the plastic film 4 are fixed to the four side walls of the sand box with tape. Guide plates 7 are arranged on the side walls of the lower sand box 5 along the closing direction. During closing, the guide plates 7 provide initial guidance for the movement of the lower sand box 5. The distance between the guide plate 7 near the side wall of the lower sand box 5 and the outer side wall of the lower sand box 5 is L, and the thickness of the plastic film 4 is L1, where L > L1. Specifically, there are four guide plates 7, respectively arranged on the four side walls of the lower sand box 5. Because L > L1, the guide plates 7 will not contact the plastic film 4 during the closing operation, and will not cause friction to the plastic film 4. Therefore, the plastic film 4 will not be damaged, thus ensuring the vacuum degree of the sand box and ensuring the normal progress of sand casting.

[0021] The upper sand box 3 has an upper positioning plate 1 fixed to its side wall, and a guide post 2 fixed to the lower part of the upper positioning plate 1. The lower sand box 5 has a lower positioning plate 6 fixed to its side wall, and a guide hole 61 is provided on the upper surface of the lower positioning plate 6. The guide post 2 matches the guide hole 61. Specifically, each side wall of the upper sand box 3 has two upper positioning plates 1, and each side wall of the lower sand box 5 has two lower positioning plates 6. The two upper positioning plates 1 are symmetrically arranged on both sides of the guide plate 7, and the two lower positioning plates 6 are symmetrically arranged on both sides of the guide plate 7. The guide post 2 provides precise guidance for the sand box closing operation. Since the guide hole 61 and the guide post 2 are both located on the side wall of the sand box, the plastic film 4 will not be damaged during the sand box closing process, ensuring the vacuum conditions of the entire sand box closing process.

[0022] Furthermore, the guide post 2 is a circular cylinder, the guide hole 61 is a cylindrical hole, and a conical hole 62 is provided at the upper part of the cylindrical hole. The conical hole 62 can further guide the guide post 2.

[0023] Furthermore, the upper end of the guide plate 7 is a free end, the lower end of the guide plate 7 is fixed to one end of the connecting plate 8, and the other end of the connecting plate 8 is fixed to the outer side wall of the lower sand box 5. The guide plate 7 and the connecting plate 8 form an "L" shape.

[0024] During the sand box closing operation, the upper sand box 3 is slowly lowered under the guidance of the guide plate 7 and the guide post 2, and the guide post 2 is inserted into the guide hole 61, which achieves precise positioning, ensures the vacuum degree of the sand box, and ensures the normal progress of sand casting.

[0025] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The descriptions of the above embodiments and specifications are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of protection claimed by this utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A mold closing guide for casting production, comprising an upper mold box (3) and a lower mold box (5), the upper mold box (3) having a plastic film (4) on the top and bottom thereof, and the lower mold box (5) having a plastic film (4) on the top and bottom thereof, characterized in that, The side wall of the lower sand box (5) is provided with a guide plate (7) along the direction of closing, the distance between the side wall of the lower sand box (5) and the outer side wall of the lower sand box (5) is L, the thickness of the plastic film (4) is L1, and L>L1; the side wall of the upper sand box (3) is fixed with an upper positioning plate (1), the lower part of the upper positioning plate (1) is fixed with a guide column (2), the side wall of the lower sand box (5) is fixed with a lower positioning plate (6), the upper surface of the lower positioning plate (6) is provided with a guide hole (61), and the guide column (2) is matched with the guide hole (61).

2. A mold closing guide mechanism for a casting production according to claim 1, characterized in that, The guide column (2) is a circular column, and the guide hole (61) is a cylindrical hole, and a tapered hole (62) is further arranged at the upper part of the cylindrical hole.

3. The mold closing guide mechanism for casting production according to claim 1, wherein The upper end of the guide plate (7) is a free end, the lower end of the guide plate (7) is fixed with one end of a connecting plate (8), the other end of the connecting plate (8) is fixed with the outer side wall of the lower sand box (5), and the guide plate (7) and the connecting plate (8) form an "L" shape.

4. The mold closing guide mechanism for casting production according to claim 3, wherein The guide plate (7) has four, and is arranged on the four side walls of the lower sand box (5) respectively.

5. A mould parting guide according to claim 4, wherein the guide is formed by a plurality of guide elements (1) which are arranged in a row (2) and are connected to each other by a connecting element (3). Two upper positioning plates (1) are arranged on each side wall of the upper sand box (3), and the two upper positioning plates (1) are symmetrically arranged on the two sides of the guide plate (7); two lower positioning plates (6) are arranged on each side wall of the lower sand box (5), and the two lower positioning plates (6) are symmetrically arranged on the two sides of the guide plate (7).

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