A mechanism for quick character changing in sand molds

Abstract

A mechanism for quick character changing in sand molds is disclosed. The mold is mounted on the upper part of the upper mold base. The mechanism includes a stripper plate, a thrust block, a character striking rod, and a character quick-change key. The stripper plate is located below the upper mold base and is connected to the upper mold base via guide pillars. The thrust block is fixed to the upper part of the stripper plate, and the character striking rod is also fixed to the upper part of the stripper plate. The lower part of the mold has an ejection hole for the character striking rod to enter. The character quick-change key is embedded in the upper part of the mold, and its embedded position matches the upper end of the ejection hole. The thrust block limits the distance between the stripper plate and the upper mold base, so that when the stripper plate moves to its limit position, the upper end of the character striking rod is lower than the character quick-change key. The positions of the character striking rod and the character quick-change key are controlled by a detachable thrust block. During production, the thrust block is installed to limit the mold closing distance, and the top of the rod does not contact the character. When character replacement is required, the thrust block is removed, and the rod ejects the character after mold closing. This mechanism has high work efficiency, can be repeatedly implemented, and is suitable for quick-change requirements in production lines.

Description

Technical Field

[0001] This utility model relates to the field of sand mold technology, and in particular to a mechanism for quickly changing characters in sand molds. Background Technology

[0002] Sand molds are a traditional process widely used in metal casting. The core of the process is to create a mold by combining sand particles with a binder to form the shape of metal parts. It is low in cost, highly adaptable, and can produce complex shapes and large castings (such as engine blocks and turbocharger parts). The materials can be reused. Due to its flexibility and economy, sand molds still occupy an important position in today's manufacturing industry, and are especially suitable for the production of medium and large castings that are cost-sensitive and have complex structures.

[0003] The quick-change design of characters on the mold surface is an important part of the sand mold production line. Production personnel and customers need to trace product information from the product character code. Existing character replacement methods cannot meet the quick-change requirements of the production line. Summary of the Invention

[0004] The purpose of this invention is to provide a mechanism for quickly changing characters on sand molds, which has high working efficiency, precise and efficient character replacement, and meets the requirements of rapid changeover in production lines.

[0005] To achieve the above objectives, the technical solution of this utility model is as follows:

[0006] A mechanism for quickly changing characters on a sand mold, wherein the mold is mounted on the upper end of an upper mold base, the mechanism includes a stripper plate, a thrust block, a character striking rod, and a character quick-change key. The stripper plate is located below the upper mold base and is vertically guided to the upper mold base via guide posts. The thrust block is fixed to the upper end of the stripper plate, and the character striking rod is vertically fixed to the upper end of the stripper plate. The lower part of the mold has an ejection hole for the character striking rod to enter. The character quick-change key is embedded in the upper part of the mold, and the position of the character quick-change key matches the position of the upper end of the ejection hole. The thrust block limits the distance between the stripper plate and the upper mold base, so that when the stripper plate moves to its extreme position, the upper end of the character striking rod is lower than the character quick-change key.

[0007] Furthermore, the character quick-switch key and the mold are connected by a sliding groove and a sliding bar structure.

[0008] Furthermore, the thrust blocks are evenly distributed at the four corners of the stripper plate.

[0009] Furthermore, the character striking rod includes a striking base and a vertical rod. The diameter of the striking base is larger than the diameter of the vertical rod. The vertical rod has a tapering cylindrical structure from bottom to top, and the ratio of the diameter of the bottom of the vertical rod to the diameter of the top is 1:0.7-0.9. The top of the vertical rod is provided with a raised impact point, and the end of the impact point is arc-shaped.

[0010] Furthermore, the character quick-switch key has raised slide bars on both sides of the center, and the mold has a set of slide grooves corresponding to the slide bars.

[0011] Furthermore, the inner diameter of the ejector hole is larger than the outer diameter of the character quick-switch key, and the inner wall of the ejector hole is provided with several guide strips.

[0012] Furthermore, the bottom of the character quick-switch key is provided with an impact groove that matches the impact point, and the depth of the impact groove is 0.1-0.25mm.

[0013] This utility model provides a mechanism for quickly changing characters in sand molds. The positional relationship between the character striking rod and the character quick-change key is controlled by a detachable thrust block. During normal production, the thrust block is installed to limit the gap when the mold is closed, so that the top of the rod does not contact the character. When the character needs to be replaced, the thrust block is removed, and the rod directly ejects the character after the mold is closed. It has high working efficiency, simple and stable structure, can be repeatedly implemented, and is suitable for quick change requirements in production lines. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0015] Figure 2 This is another schematic diagram of the overall structure of this utility model;

[0016] Figure 3 This is a schematic diagram of the quick-change key for characters on the mold surface of this utility model;

[0017] Figure 4 This is a cross-sectional view of the mold and character quick-switch key of this utility model.

[0018] Figure label:

[0019] 1 Stripper plate, 2 Thrust block, 3 Character knocking rod, 4 Character quick change key, 5 Upper mold base, 6 Guide pillar, 7 Mold;

[0020] 31. Tap the base; 32. Stand upright. Detailed Implementation

[0021] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0022] This utility model discloses a mechanism for quickly changing characters on sand molds, such as... Figure 1 and Figure 2 As shown, the mold 7 is installed on the upper end of the upper mold base 5. The mechanism includes a stripper plate 1, a thrust block 2, a character striking rod 3 and a character quick-change key 4. The stripper plate 1 is located below the upper mold base 5. The stripper plate 1 and the upper mold base 5 are connected vertically by guide pillars 6. The guide pillars 6 are evenly distributed in the rectangular space between the stripper plate 1 and the upper mold base 5.

[0023] like Figure 1 As shown, the thrust block 2 is fixed at the upper end of the stripper plate 1. The thrust blocks 2 are evenly distributed at the four corners of the stripper plate 1. The thrust blocks 2 limit the distance between the stripper plate 1 and the upper mold base 5, so that when the stripper plate 1 moves up to the limit position, the upper end of the character striking rod 3 is lower than the character quick-change key 4.

[0024] The character striking rod 3 is fixed vertically at the upper end of the stripper plate 1. The lower part of the mold 7 is provided with an ejection hole for the character striking rod 3 to enter. The character quick-change key 4 is embedded in the upper part of the mold 7. The position of the character quick-change key 4 is matched with the position of the upper end of the ejection hole. Preferably, the character quick-change key 4 and the mold 7 are connected by a sliding groove and a sliding strip structure, which can accurately and stably fix the character and facilitate quick replacement.

[0025] Specifically, the character striking lever 3 includes a striking base 31 and a vertical rod 32. The diameter of the striking base is larger than the diameter of the vertical rod. The vertical rod has a tapering cylindrical structure from bottom to top, with the ratio of the bottom diameter to the top diameter being 1:0.7-0.9, preferably 1:0.85. The top of the vertical rod has a raised impact point, the end of which is arc-shaped. The bottom of the character quick-change key has an impact groove that mates with the impact point. The depth of the impact groove is 0.1-0.25mm, reducing the force-bearing area and increasing the striking force, while ensuring precise point-to-point force application, ensuring the character quick-change key pops out easily. The combination of the impact point and the impact groove allows for faster and more precise ejection of the character quick-change key, improving efficiency and ensuring 100% ejection.

[0026] Furthermore, the character quick-switch key has raised slide bars on both sides at the center, and the mold has a set of slide grooves corresponding to the slide bars. The inner diameter of the ejection hole is larger than the outer diameter of the character quick-switch key, and the inner wall of the ejection hole has several guide bars to help the character quick-switch key to be ejected easily and quickly, while preventing offset or jamming during the ejection process.

[0027] like Figure 3 and Figure 4 As shown, under normal production conditions, the stripper plate 1 demolds the product under the force of the stripping mechanism of the machine. The thrust block 2 limits the upward movement of the stripper plate 1 to prevent the upper end of the character striking rod 3 from contacting the character quick-change key 4. Here, the height of the thrust block 2 is also required, generally 1 / 5 to 1 / 4 of the height of the character striking rod 3.

[0028] When character replacement is required, the thrust block 2 is removed. Under the action of the machine's unloading mechanism, the stripper plate 1 can move upwards by an increased stroke. The upper end of the character striking rod 3 contacts and continues to move upwards, pushing out the character quick-change key 4.

[0029] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A mechanism for quick character change of sand moulds, said moulds (7) being mounted on the upper end of the upper mould holder (5), characterised in that, The mechanism includes a stripper plate (1), a thrust block (2), a character striking rod (3), and a character quick-change key (4). The stripper plate (1) is located below the upper mold base (5). The stripper plate (1) and the upper mold base (5) are connected vertically by a guide post (6). The thrust block (2) is fixed at the upper end of the stripper plate (1). The character striking rod (3) is fixed vertically at the upper end of the stripper plate (1). The lower part of the mold (7) is provided with an ejection hole for the character striking rod (3) to enter. The character quick-change key (4) is embedded in the upper part of the mold (7). The position of the character quick-change key (4) is matched with the position of the upper end of the ejection hole. The thrust block (2) limits the distance between the stripper plate (1) and the upper mold base (5), so that when the stripper plate (1) moves up to the limit position, the upper end of the character striking rod (3) is lower than the character quick-change key (4).

2. The mechanism for quick character change of sand mould according to claim 1, characterized in that, The character quick-switch key (4) and the mold (7) are connected by a sliding groove and a sliding bar structure.

3. The mechanism for quick character change of sand mould according to claim 1, wherein, The thrust blocks (2) are evenly distributed at the four corners of the stripper plate (1).

4. The mechanism for quick character change of sand mould according to claim 1, wherein, The character striking rod (3) includes a striking base and a standing rod. The diameter of the striking base is larger than the diameter of the standing rod. The standing rod has a tapering cylindrical structure from bottom to top. The ratio of the diameter of the bottom of the standing rod to the diameter of the top is 1:0.7-0.

9. The top of the standing rod is provided with a raised impact point, and the end of the impact point is arc-shaped.

5. The mechanism for quick character change of sand moulds according to claim 2, characterized in that, The character quick-switch key (4) has raised sliders on both sides in the middle, and the mold (7) has a set of grooves corresponding to the sliders.

6. The mechanism for quick character change of sand moulds according to claim 1, characterized in that, The inner diameter of the ejector hole is larger than the outer diameter of the character quick-change key (4), and the inner wall of the ejector hole is provided with several guide strips.

7. The mechanism for quick character changing in sand molds according to claim 4, characterized in that, The bottom of the character quick-change key (4) is provided with an impact groove that matches the impact point, and the depth of the impact groove is 0.1-0.25mm.

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