Natural gas valve body casting mold

Abstract

The utility model relates to the technical field of casting, and discloses a natural gas valve body casting mold which comprises a lower mold, the upper mold is arranged at the top of the lower mold, and a first casting forming groove and a second casting forming groove which are used for natural gas valve body casting are formed in the side, opposite to the upper mold, of the bottom of the lower mold correspondingly; the ejection assembly is arranged at the top of the lower mold; the pouring gate is arranged at the bottom of the upper mold; through the sand core and the integrated low-pressure casting forming process, the natural gas valve body casting is uniform in wall thickness and good in compactness, and the requirement for high mechanical performance can be met; and molten metal is guided into the first casting forming groove and the second casting forming groove from bottom to top through the two pouring gates, so that the first casting forming groove and the second casting forming groove are filled with the molten metal, the outer side of the sand core is wrapped with the molten metal, and a casting body has the effects of being fast in forming and short in casting period.

Description

Technical Field

[0001] The utility model relates to the technical field of casting, in particular to a natural gas valve body casting mold. Background Art

[0002] Castings are metal shaped objects obtained by various casting methods. That is, the smelted liquid metal is poured into a pre-prepared mold by pouring, injection, suction or other casting methods. After cooling and subsequent processing such as polishing, the resulting object has a certain shape, size and performance.

[0003] Traditional casting methods begin by creating a wax pattern, then coating it with refractory material to form a shell. The wax pattern is then melted at high temperatures, leaving a cavity. Liquid metal is then poured into the cavity, cooled, and solidified, ultimately resulting in the casting. This requires multiple steps to complete the casting, resulting in a long casting cycle. Therefore, a natural gas valve body casting mold was proposed. Utility Model Content

[0004] The present utility model aims to provide a natural gas valve body casting mold to address the problems of the conventional casting method described in the background art. The method involves first making a wax pattern, then coating the wax pattern with refractory material to form a mold shell. The wax pattern is then melted and released at high temperature, leaving a cavity. Liquid metal is then poured into the cavity and cooled and solidified to form the final casting. This casting process requires multiple steps to complete the casting, resulting in a long casting cycle.

[0005] To achieve the above purpose, the utility model provides the following technical solutions: a natural gas valve body casting mold, comprising

[0006] Lower mold;

[0007] An upper mold, the upper mold being arranged on the top of the lower mold, and a first casting molding groove and a second casting molding groove for casting a natural gas valve body are respectively provided on a bottom of the lower mold and a side opposite to the upper mold;

[0008] An ejector assembly, the ejector assembly being arranged on the top of the lower mold;

[0009] A gate is provided at the bottom of the upper mold.

[0010] Preferably, a trough body is provided on the top of the above-mentioned lower mold, the first casting molding groove is provided at the bottom of the trough body, a sand core is placed inside the first casting molding groove, and the gate is connected to the first casting molding groove.

[0011] Preferably, a protrusion is provided at the bottom of the upper mold, and the second casting forming groove is provided at the bottom of the protrusion.

[0012] Preferably, the above-mentioned ejection assembly includes an upper mold ejection plate, four support columns and several ejector columns. The upper mold ejection plate is arranged above the upper mold, and the four support columns are respectively fixedly connected to the four corners of the bottom of the upper mold ejection plate, and several ejector columns are fixedly connected to the bottom of the upper mold ejection plate.

[0013] Preferably, the four corners of the top of the upper mold are each provided with a first guide hole, and the four support columns are movably inserted into the inside of the first guide holes. The top of the upper mold is provided with a plurality of second guide holes, and a plurality of top columns are movably inserted into the inside of the plurality of second guide holes.

[0014] Preferably, the plurality of second guide holes are all connected to the second casting molding groove.

[0015] Preferably, positioning posts are provided at the four corners of the bottom of the upper mold, and a positioning groove is provided at the top of the lower mold, and the positioning posts and the positioning groove match each other.

[0016] Compared with the prior art, the utility model adopts the above technical solution and has the following technical effects: the utility model uses a sand core and an integrated low-pressure casting process to ensure that the wall thickness of the natural gas valve body casting is uniform and dense, which can meet the requirements of high mechanical properties; the metal liquid is introduced from bottom to top into the interior of the first casting molding groove and the second casting molding groove through two gates, so that the metal liquid fills the interior of the first casting molding groove and the second casting molding groove and wraps around the outside of the sand core, so that the casting has the effects of fast molding and short casting cycle, and the casting is ejected and removed by the upper mold to ensure that the deformation is small when the casting is ejected. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0018] Figure 1 It is a structural diagram of the utility model;

[0019] Figure 2 This is a schematic diagram of the cross-sectional structure of the lower mold of the present utility model;

[0020] Figure 3 This is a schematic diagram of the cross-sectional structure of the upper mold ejector plate of the present utility model;

[0021] Figure 4 This is a schematic diagram of the lower mold structure of the present utility model;

[0022] Figure 5 This is a schematic diagram of the upper mold structure of the present utility model.

[0023] Explanation of the accompanying reference numerals: 1. lower mold; 101. trough body; 102. first casting molding groove; 103. sand core; 104. gate; 2. upper mold; 201. protrusion; 202. second casting molding groove; 203. upper mold ejector plate; 204. support column; 205. ejector column; 3. first guide hole; 4. second guide hole; 5. positioning column; 6. positioning groove. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0025] It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the conditions under which this application can be implemented. Therefore, they have no substantive technical significance. Any structural modification, change in proportional relationship or adjustment of size should still fall within the scope of the technical content disclosed in this application without affecting the efficacy and purpose that can be achieved by this application.

[0026] Example

[0027] See also Figure 1-5 The utility model provides a technical solution: a natural gas valve body casting mold, comprising a lower mold 1; an upper mold 2, the upper mold 2 is arranged on the top of the lower mold 1, and a first casting molding groove 102 and a second casting molding groove 202 for casting the natural gas valve body casting are respectively provided on the side of the bottom of the lower mold 1 opposite to the upper mold 2; an ejector assembly, the ejector assembly is arranged on the top of the lower mold 1;

[0028] In order to shorten the casting cycle, a gate 104 is provided at the bottom of the upper mold 2; a trough 101 is provided on the top of the lower mold 1, a first casting molding groove 102 is provided at the bottom of the trough 101, a sand core 103 is placed inside the first casting molding groove 102, the gate 104 is connected to the first casting molding groove 102, a protrusion 201 is provided at the bottom of the upper mold 2, and the second casting molding groove 202 is provided at the bottom of the protrusion 201; the sand core 103 is placed in the first casting molding groove 102 , and then moves through the bottom of the lower mold 1 to the top of the upper mold 2. At this time, the protrusion 201 contacts the inside of the first casting molding groove 102, and the sand core 103 moves to the inside of the second casting molding groove 202. The metal liquid is introduced from bottom to top into the first casting molding groove 102 and the second casting molding groove 202 through the two gates 104, so that the metal liquid fills the inside of the first casting molding groove 102 and the second casting molding groove 202 and is wrapped around the outside of the sand core 103, thereby completing the casting of the casting.

[0029] In order to ensure that the casting is slightly deformed during ejection, the ejection assembly includes an upper mold ejection plate 203, four support columns 204, and a plurality of ejector columns 205. The upper mold ejection plate 203 is arranged above the upper mold 2. The four support columns 204 are fixedly connected to the four corners of the bottom of the upper mold ejection plate 203. A plurality of ejector columns 205 are fixedly connected to the bottom of the upper mold ejection plate 203. The four corners of the top of the upper mold 2 are provided with first guide holes 3. The four support columns 204 are movably inserted into the interior of the first guide holes 3. The top of the upper mold 2 is provided with a plurality of second guide holes 4. A plurality of ejector columns 205 are fixedly connected to the bottom of the upper mold ejection plate 203. It is movably inserted into the interior of several second guide holes 4, and several second guide holes 4 are connected to the second casting molding groove 202; when the metal liquid cools, it moves upward through the upper mold 2, and the upper mold 2 moves respectively on the outside of the support column 204 and the top column 205. At this time, the top column 205 pushes the formed natural gas valve body casting out of the interior of the second casting molding groove 202, and then drives the upper mold ejector plate 203 to move upward through the upper mold 2. At this time, the support column 204 is separated from the top of the lower mold 1, and the top column 205 is separated from the outside of the casting, and then the casting can be taken out of the lower mold 1.

[0030] In order to ensure the casting quality of the natural gas valve body casting, positioning columns 5 are provided at the four corners of the bottom of the upper mold 2, and a positioning groove 6 is provided at the top of the lower mold 1. The positioning columns 5 and the positioning groove 6 match each other; during the closing process of the upper mold 2 and the lower mold 1, the four positioning columns 5 are simultaneously inserted into the interior of the positioning groove 6 to prevent the lower mold 1 and the upper mold 2 from being misaligned when closing.

[0031] Working principle or structural principle, when it is necessary to cast the natural gas valve body casting, the sand core 103 is placed inside the first casting molding groove 102, and then moved to the top of the upper mold 2 through the bottom of the lower mold 1. At this time, the protrusion 201 is in contact with the inside of the first casting molding groove 102, and the sand core 103 is moved to the inside of the second casting molding groove 202. During this process, the four positioning columns 5 are simultaneously inserted into the inside of the positioning groove 6 to prevent the position from being misaligned when the lower mold 1 and the upper mold 2 are closed, thereby improving the quality of the natural gas valve body casting. At this time, the metal liquid can be introduced from bottom to top into the inside of the first casting molding groove 102 and the second casting molding groove 202 through the two gates 104, so that the metal liquid fills the inside of the first casting molding groove 102 and the second casting molding groove 202 and wraps around the outside of the sand core 103, so that the casting has the effect of fast molding and short casting cycle.

[0032] After the metal liquid cools, the upper mold 2 moves upward, and the upper mold 2 moves on the outside of the support column 204 and the ejector column 205 respectively. At this time, the ejector column 205 pushes the formed natural gas valve body casting out of the interior of the second casting molding groove 202. The upper mold 2 is used for ejection, which is convenient and fast, ensuring that the casting is slightly deformed during ejection. The upper mold 2 then drives the upper mold ejection plate 203 to move upward. At this time, the support column 204 is separated from the top of the lower mold 1, and the ejector column 205 is separated from the outside of the casting. Then, the casting can be taken out of the lower mold 1.

[0033] Those skilled in the art will appreciate that various combinations and / or combinations of features described in the various embodiments and / or claims of the present invention may be employed, even if such combinations and / or combinations are not explicitly described in the present invention. In particular, various combinations and / or combinations of features described in the various embodiments and / or claims of the present invention may be employed without departing from the spirit and teachings of the present invention. All such combinations and / or combinations fall within the scope of the present invention.

Claims

1. Natural gas valve body casting mold, characterized by: include Lower mold (1); An upper mold (2), the upper mold (2) being arranged on the top of the lower mold (1), and a first casting molding groove (102) and a second casting molding groove (202) for casting a natural gas valve body casting are respectively provided on a side of the bottom of the lower mold (1) opposite to the upper mold (2); An ejector assembly, the ejector assembly being arranged on the top of the lower mold (1); A gate (104) is provided at the bottom of the upper mold (2).

2. The natural gas valve body casting mold according to claim 1, characterized in that: A trough body (101) is provided at the top of the lower mold (1), the first casting molding trough (102) is provided at the bottom of the trough body (101), a sand core (103) is placed inside the first casting molding trough (102), and the gate (104) is connected to the first casting molding trough (102).

3. The natural gas valve body casting mold according to claim 1, characterized in that: The bottom of the upper mold (2) is provided with a protrusion (201), and the second casting molding groove (202) is provided at the bottom of the protrusion (201).

4. The natural gas valve body casting mold according to claim 1, characterized in that: The ejection assembly comprises an upper mold ejection plate (203), four support columns (204) and a plurality of ejector columns (205); the upper mold ejection plate (203) is arranged above the upper mold (2); the four support columns (204) are respectively fixedly connected to the four corners of the bottom of the upper mold ejection plate (203); and the plurality of ejector columns (205) are fixedly connected to the bottom of the upper mold ejection plate (203).

5. The natural gas valve body casting mold according to claim 4, characterized in that: The top four corners of the upper mold (2) are each provided with a first guide hole (3), and the four support columns (204) are movably inserted into the interior of the first guide holes (3). The top of the upper mold (2) is provided with a plurality of second guide holes (4), and a plurality of top columns (205) are movably inserted into the interior of the plurality of second guide holes (4).

6. The natural gas valve body casting mold according to claim 5, characterized in that: A plurality of the second guide holes (4) are all connected to the second casting molding groove (202).

7. The natural gas valve body casting mold according to claim 1, characterized in that: The four corners of the bottom of the upper mold (2) are all provided with positioning columns (5), and the top of the lower mold (1) is provided with a positioning groove (6), and the positioning columns (5) and the positioning groove (6) match each other.

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