Precision casting precoated sand mold for long-service-life valve body

Abstract

The utility model relates to a long-service-life valve body precision casting precoated sand mold, and belongs to the technical field of precoated sand molds, the long-service-life valve body precision casting precoated sand mold comprises a mold base, an upper mold and a lower mold, the upper mold and the lower mold are fixedly connected to the mold base, locking structures are arranged on the side faces of the upper mold and the lower mold, and each locking structure comprises a positioning block fixedly installed on the side face of the lower mold. According to the long-service-life valve body precision casting precoated sand mold, one side of the upper mold body and one side of the lower mold body are provided with locking rods and positioning blocks, meanwhile, sliding strips are installed in the positioning blocks in a sliding mode, and right-angle grooves of the sliding strips and the locking rods abut against each other for limiting, so that locking and positioning of the upper mold body and the lower mold body are achieved; the reset rod composed of the fixed end and the extending end synchronously moves along with the locking rod, so that the position of the sliding strip can be conveniently controlled, the fixed end and the extending end are detachably connected, the extending end can be conveniently disconnected, and therefore the upper die and the lower die are prevented from being separated, positioning deviation is reduced, and the production efficiency is improved. And the service life of the die is prolonged.

Description

Technical Field

[0001] This application relates to the field of coated sand mold technology, specifically a high-life valve body precision casting coated sand mold. Background Technology

[0002] Coated sand molds are molds used in casting processes, primarily for manufacturing metal castings. Their basic principle involves mixing a special type of sand (usually silica sand) with resin or other binders to form a sand mold with good strength and heat resistance.

[0003] Coated sand molds are used to provide the molding space for coated sand. The mold adopts the form of upper and lower molds closing together. After the molds are closed, pressure is applied to the upper and lower molds to ensure that no gaps are generated between the upper and lower molds. The guide between the molds is achieved by guide pillars. Under long-term and repeated use, the guide structure is prone to thermal deformation, which leads to a decrease in accuracy. At this time, the mold life is severely reduced, and it is difficult to maintain high precision. In order to reduce the stress on the mold guide structure and maintain the accuracy of upper and lower mold closing, a high-life valve body precision casting coated sand mold is proposed to solve the problem. Utility Model Content

[0004] To address the shortcomings of existing technologies, this application provides a high-life valve body precision casting coated sand mold, which has the advantages of being able to guide and lock the upper and lower molds during mold closing, ensuring the accuracy of the mold in a single use, and reducing the stress on the guide structure alone during long-term use, thus improving the service life of the mold.

[0005] To achieve the above objectives, this application provides the following technical solution: a high-life valve body precision casting coated sand mold, comprising a mold base, an upper mold and a lower mold fixedly connected to the mold base, wherein the upper mold and the lower mold are provided with locking structures on their sides;

[0006] The locking structure includes a positioning block fixedly installed on the side of the lower mold and a locking rod fixedly installed on the side of the upper mold. An installation strip is fixedly installed on the side of the upper mold, and the locking rod is fixed to the installation strip by bolts. A first opening is formed through the positioning block, corresponding to the locking rod. A horizontal groove perpendicular to the first opening is also formed on the front of the positioning block. A slide bar located in the horizontal groove is slidably installed in the positioning block. A reset rod is also provided on the installation strip. The reset rod includes a fixed end and an extension end that are inserted into each other. A spring is provided between the slide bar and the inner wall of the horizontal groove.

[0007] Furthermore, a right-angle groove is provided at the end of the locking rod, the locking rod is L-shaped, and the width of the first opening corresponds to the width of the end of the locking rod.

[0008] Furthermore, the transverse groove extends into the first opening, and a through opening is provided on the slide bar.

[0009] Furthermore, the fixed end and the extended end are detachably connected, and a second opening is provided through the positioning block for the extended end to pass through.

[0010] Furthermore, the side of the extended end near the through opening is provided with an inclined surface, and the end of the through opening that is in contact with the inclined surface is trapezoidal.

[0011] Furthermore, an installation port is provided on one side of the slide bar, one end of the spring is fixedly connected to the installation port, and the other end is fixedly connected to the inner wall of the transverse groove.

[0012] Furthermore, a positioning plate corresponding to the extension end is rotatably mounted on the fixed end, a locking pin is fixedly mounted on the extension end, and a locking groove corresponding to the locking pin is provided on the positioning plate.

[0013] Compared with the prior art, the technical solution of this application has the following beneficial effects:

[0014] This high-life valve body precision casting coated sand mold features locking rods and positioning blocks on one side of both the upper and lower molds. A sliding strip is slidably installed within the positioning block, and the right-angle grooves of the sliding strip and locking rod abut against each other, locking the upper and lower molds in place. A reset rod, consisting of a fixed end and an extended end, moves synchronously with the locking rod, facilitating control of the sliding strip's position. The detachable connection between the fixed and extended ends allows for easy disengagement of the extended end, preventing mold separation and reducing positioning offset, thus extending the mold's lifespan. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this application;

[0016] Figure 2 This is a side view of the structure of the locking rod and positioning block in this application;

[0017] Figure 3 This is a three-dimensional structural view of the slider in this application.

[0018] In the diagram: 1. Mold base; 2. Lower mold; 3. Upper mold; 4. Positioning block; 5. Mounting strip; 6. Locking rod; 7. First opening; 8. Fixed end; 9. Extension end; 10. Second opening; 11. Horizontal groove; 12. Sliding strip; 13. Through-hole; 14. Right-angle groove; 15. Inclined surface; 16. Mounting port; 17. Spring; 18. Positioning plate; 19. Locking pin; 20. Locking groove. Detailed Implementation

[0019] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0020] Please see Figures 1 to 3 The high-life valve body precision casting coated sand mold in this embodiment includes a mold base 1, an upper mold 3 and a lower mold 2 fixedly connected to the mold base 1, the upper mold 3 corresponding to the lower mold 2, and a locking structure provided on the side of the upper mold 3 and the lower mold 2 for locking the upper mold 3 and the lower mold 2.

[0021] In this embodiment, the locking structure includes a positioning block 4 fixedly installed on the side of the lower mold 2 and a locking rod 6 fixedly installed on the side of the upper mold 3. An installation strip 5 is fixedly installed on the side of the upper mold 3, and the locking rod 6 is fixed to the installation strip 5 by bolts.

[0022] This design provides installation space for the locking rod 6, and the locking rod 6 can move synchronously through the movement of the upper mold 3.

[0023] It should be noted that a first opening 7 is provided through the positioning block 4, and the first opening 7 corresponds to the locking rod 6. The locking rod 6 can be easily inserted through the positioning block 4 through the first opening 7.

[0024] Preferably, a right-angle groove 14 is provided on the end of the locking rod 6, the locking rod 6 is L-shaped, and the width of the first opening 7 corresponds to the width of the end of the locking rod 6.

[0025] In order to lock the locking rod 6 relative to the positioning block 4, in this embodiment, the front of the positioning block 4 is also provided with a horizontal groove 11 perpendicular to the first opening 7, and a slide bar 12 located in the horizontal groove 11 is slidably installed in the positioning block 4.

[0026] Furthermore, the transverse groove 11 extends into the first opening 7, at which point the slide bar 12 can slide into the first opening 7, thereby lifting and restricting the end of the locking rod 6, thus achieving mold opening lock of the upper mold 3 and the lower mold 2.

[0027] In this embodiment, the mounting strip 5 is also provided with a reset rod, which includes a fixed end 8 and an extension end 9 that are plugged into each other. The fixed end 8 and the extension end 9 are detachably connected. The positioning block 4 has a second opening 10 through which the extension end 9 passes.

[0028] It should be noted that a through-hole 13 is provided on the slider 12, which allows the extension end 9 to pass through easily, thereby avoiding interference with the movement of the reset rod.

[0029] Preferably, the side of the extension end 9 near the through opening 13 is provided with a slope 15, and the end of the through opening 13 that is attached to the slope 15 is trapezoidal.

[0030] This design allows the slider 12 to slide and reset when pressed down by the extension end 9.

[0031] In this embodiment, a spring 17 is provided between the slide bar 12 and the inner wall of the transverse groove 11. Specifically, an installation port 16 is provided on one side of the slide bar 12. One end of the spring 17 is fixedly connected to the installation port 16, and the other end is fixedly connected to the inner wall of the transverse groove 11. The spring 17 can push the slide bar 12 toward one end of the locking rod 6, thereby achieving the pullback restriction of the locking rod 6.

[0032] In this embodiment, a positioning plate 18 corresponding to the extension end 9 is rotatably mounted on the fixed end 8, and a locking pin 19 is fixedly mounted on the extension end 9. The positioning plate 18 is provided with a locking groove 20 corresponding to the locking pin 19. By rotating the positioning plate 18, the locking groove 20 can be made to correspond to the locking pin 19, thereby connecting and assembling the fixed end 8 and the extension end 9 that are inserted into each other.

[0033] The working principle of the above embodiments is as follows:

[0034] By closing the upper mold 3 and the lower mold 2, the locking rod 6 and the reset rod located on the side of the upper mold 3 move downwards simultaneously. The extension end 9 under the reset rod presses the slide bar 12 through the inclined surface 15, so that the slide bar 12 slides in the transverse groove 11. At this time, the locking rod 6 can pass through the first opening 7. Then, the positioning plate 18 is rotated, so that the extension end 9 and the fixed end 8 are separated and disassembled. The upper mold 3 is restricted by the abutment of the locking rod 6 and the slide bar 12, so that it is tightly locked with the lower mold 2, reducing the positioning gap between the upper mold 3 and the lower mold 2 and extending the service life.

[0035] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0036] Although embodiments of this application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A high-life valve body precision casting coated sand mold, comprising a mold base (1), an upper mold (3) and a lower mold (2) fixedly connected to the mold base (1), characterized in that: Locking structures are provided on the sides of the upper mold (3) and the lower mold (2); The locking structure includes a positioning block (4) fixedly installed on the side of the lower mold (2) and a locking rod (6) fixedly installed on the side of the upper mold (3). An installation strip (5) is fixedly installed on the side of the upper mold (3). The locking rod (6) is fixed to the installation strip (5) by bolts. A first opening (7) is provided through the positioning block (4). The first opening (7) corresponds to the locking rod (6). A transverse groove (11) perpendicular to the first opening (7) is also provided on the front of the positioning block (4). A slide bar (12) located in the transverse groove (11) is slidably installed in the positioning block (4). A reset rod is also provided on the installation strip (5). The reset rod includes a fixed end (8) and an extension end (9) that are inserted into each other. A spring (17) is provided between the slide bar (12) and the inner wall of the transverse groove (11).

2. The high-life valve body precision casting coated sand mold according to claim 1, characterized in that: The locking rod (6) has a right-angle groove (14) at its end. The locking rod (6) is L-shaped, and the width of the first opening (7) corresponds to the width of the end of the locking rod (6).

3. The high-life valve body precision casting coated sand mold according to claim 1, characterized in that: The transverse groove (11) extends into the first opening (7), and a through opening (13) is provided on the slide bar (12).

4. The high-life valve body precision casting coated sand mold according to claim 1, characterized in that: The fixed end (8) and the extended end (9) are detachably connected, and the positioning block (4) has a second opening (10) through which the extended end (9) passes.

5. A high-life valve body precision casting coated sand mold according to claim 3, characterized in that: The extension end (9) has a slope (15) on one side near the through opening (13), and the through opening (13) is trapezoidal at one end of the slope (15).

6. The high-life valve body precision casting coated sand mold according to claim 1, characterized in that: The slide bar (12) has an installation port (16) on one side. One end of the spring (17) is fixedly connected to the installation port (16), and the other end is fixedly connected to the inner wall of the transverse groove (11).

7. A high-life valve body precision casting coated sand mold according to claim 1, characterized in that: A positioning plate (18) corresponding to the extension end (9) is rotatably mounted on the fixed end (8), a locking pin (19) is fixedly mounted on the extension end (9), and a locking groove (20) corresponding to the locking pin (19) is opened on the positioning plate (18).

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