Metal mold for transition of round flange and rectangular flange into 90-degree shell
By installing a water spray component in the metal mold and injecting water into the sand core, the problem of difficulty in removing the sand core when casting non-standard flange pipe fittings is solved, rapid and uniform water penetration is achieved, and the demoulding efficiency is significantly improved.
Patent Information
- Application Number
- CN202423109036.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-17
- Publication Date
- 2025-01-21
- Estimated Expiration
- 2034-12-17
AI Technical Summary
When casting non-standard shape flange fittings, it is difficult to remove the sand core, and traditional water spraying methods are difficult to achieve uniform penetration of water, affecting the demolding efficiency.
Design a metal mold in which the circular flange and the rectangular flange transition into a 90-degree shell, including a water spray component, which injects water into the sand core through the water spray slot to promote rapid water penetration.
It achieves rapid and uniform penetration of water into the sand core, simplifies the sand core removal process, and significantly improves the demoulding efficiency.
Smart Images
Figure CN222370307U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of molds, and in particular provides a metal mold for transitioning a circular flange and a rectangular flange into a 90-degree shell. Background Art
[0002] To ensure the smooth operation of the exhaust system, vehicles are usually equipped with exhaust pipes. In order to reduce exhaust resistance, exhaust pipes are usually designed in a straight shape. However, due to the limitation of installation space, exhaust pipes need to be connected through bent flange pipes. These bent flange pipes usually have a bending angle of 90 degrees. In practical applications, these flange pipes connect structures of different shapes, so they are often designed as non-standard structures with a round flange at one end and a rectangular flange at the other end. Due to the complexity of this non-standard structure, casting is usually used for production.
[0003] In the process of casting these non-standard pipe fittings, the problem of difficulty in removing the inner core is often encountered. In the case of sand core as the inner core, water spraying is usually used to soften the sand core material so that it can be removed more easily. However, due to the irregular shape of the sand core, the conventional water spraying method is difficult to achieve uniform water penetration and takes a long time, which not only affects the demoulding efficiency, but also may delay the cleaning and processing progress of subsequent parts. Therefore, there is an urgent need for a special metal mold that can be used for flange pipe fittings with round flanges and rectangular flanges transitioning to 90-degree shells to ensure that water can effectively penetrate into the sand core. Utility Model Content
[0004] In order to solve the above problems, the utility model provides a metal mold for transitioning a circular flange and a rectangular flange into a 90-degree shell.
[0005] To achieve the above purpose, the technical solution adopted by the utility model is: a metal mold for transitioning a circular flange and a rectangular flange into a 90-degree shell, comprising a base, a lower template, a right template, a left template, a front template, a sand core and a water spray assembly, wherein the lower template is fixedly installed on the base through a column, the front template and the sand core are assembled on the upper surface of the lower template, the right template and the left template are assembled on the rear surface of the front template after being spliced, and the right template and the left template are placed on the lower template, the water spray assembly is assembled on the upper surface of the base, and the output end of the water spray assembly acts on the sand core;
[0006] A rectangular groove is formed on the lower surface of the sand core, a water spray slot is formed on the inner surface of the rectangular groove, and the output end of the water spray component is plugged into the water spray slot.
[0007] Furthermore, limiting blocks are symmetrically fixedly installed on the upper surface of the lower template front and back, a front template positioning block is fixedly installed on the front side of the upper surface of the lower template, a rectangular cavity corresponding to the rectangular groove is opened on the upper surface of the lower template, a sand core positioning block is fixedly installed in the middle of the inner surface of the rectangular cavity, a through hole corresponding to the water spray slot is opened on the inner surface of the rectangular cavity, a drainage port is opened on the inner cavity side surface of the rectangular cavity, and a pouring port is opened on the upper surface of the lower template.
[0008] Furthermore, the right template and the left template are placed between the limiting blocks on the lower template, the front surface of the right template is integrally formed with a right template positioning block, and the side surface of the right template is provided with a slot;
[0009] A left template positioning block is integrally formed on the front surface of the left template, and an inserting block matching the slot is integrally formed on the side surface of the left template.
[0010] Furthermore, positioning grooves are symmetrically provided on the left and right sides of the rear surface of the front template, and the right template positioning block and the left template positioning block are respectively inserted into the positioning grooves, and a front template positioning groove corresponding to the front template positioning block is provided on the lower surface of the front template.
[0011] Furthermore, a sand core positioning groove matching the sand core positioning block is formed on the lower surface of the sand core.
[0012] Furthermore, the water spray assembly includes a hydraulic cylinder, a mounting block, a water spray pipe and a water diversion pipe. The mounting block is fixedly mounted on the output end of the hydraulic cylinder, the water spray pipe is fixedly mounted on the upper surface of the mounting block, and the water spray pipe is inserted into the water spray slot after passing through the through hole. A plug is provided at the upper end of the water spray pipe, and water outlets are evenly opened on the outer peripheral surface of the water spray pipe. A water diversion pipe is fixedly mounted on the front surface of the mounting block, and the water diversion pipe is connected to the water spray pipe.
[0013] The beneficial effects of using the utility model are:
[0014] The utility model provides a water spray slot on the sand core and is equipped with a water spray assembly, so that water can be injected into the sand core after the casting of the parts is completed to promote the rapid penetration of water in the sand core. This method not only speeds up the penetration speed, but also improves the uniformity of the penetration effect, thereby simplifying the removal process of the sand core and significantly improving the demoulding efficiency.
[0015] The utility model designs the structures of the lower template, the right template, the left template and the front template so that these templates can be assembled together through plug-in positioning. This design makes the installation of each template easier, ensures the precise control of the wall thickness of the casting parts, avoids the wall thickness of the parts from exceeding the tolerance, and thus improves the efficiency and qualified rate of parts production. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 It is one of the three-dimensional schematic diagrams of the utility model.
[0017] Figure 2 This is the second stereoscopic schematic diagram of the present utility model.
[0018] Figure 3 It is an exploded view of the utility model.
[0019] Figure 4 It is the front view of the utility model.
[0020] Figure 5 For this utility model Figure 4 Cross-sectional view along the AA direction.
[0021] Figure 6 It is a three-dimensional schematic diagram of the lower template of the utility model.
[0022] Figure 7 It is a three-dimensional schematic diagram of the right template of the utility model.
[0023] Figure 8 It is a three-dimensional schematic diagram of the left template of the utility model.
[0024] Fig. 9 It is a three-dimensional schematic diagram of the front template of the utility model.
[0025] Fig.10 It is a three-dimensional schematic diagram of the sand core of the utility model.
[0026] Fig.11 It is a three-dimensional schematic diagram of the utility model in which the circular flange and the rectangular flange transition into a 90-degree shell.
[0027] The accompanying drawings include: 1, base, 2, lower template, 21, limit block, 22, front template positioning block, 23, rectangular cavity, 24, sand core positioning block, 25, through hole, 26, drain port, 27, pouring port, 3, right template, 31, right template positioning block, 32, slot, 4, left template, 41, left template positioning block, 42, insert block, 5, front template, 51, positioning slide groove, 52, front template positioning groove, 6, sand core, 61, rectangular groove, 62, sand core positioning groove, 63, water spray slot, 7, water spray assembly, 71, hydraulic cylinder, 72, mounting block, 73, water spray pipe, 74, water diversion pipe. DETAILED DESCRIPTION
[0028] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0029] Reference Figures 1 to 5 A metal mold for a circular flange and a rectangular flange transitioning into a 90-degree shell, comprising a base 1, a lower template 2, a right template 3, a left template 4, a front template 5, a sand core 6 and a water spray assembly 7. The lower template 2 is fixedly installed on the base 1 through a column, the front template 5 and the sand core 6 are assembled on the upper surface of the lower template 2, the right template 3 and the left template 4 are assembled on the rear surface of the front template 5 after splicing, and the right template 3 and the left template 4 are placed on the lower template 2, the water spray assembly 7 is assembled on the upper surface of the base 1, and the output end of the water spray assembly 7 acts on the sand core 6.
[0030] like Fig.11 As shown, the part is a circular flange and a rectangular flange transitioning into a 90-degree shell. Due to the particularity of the shape, the metal mold does not have an upper template, but is assembled with a lower template 2, a right template 3, a left template 4, a front template 5 and a sand core 6. At the same time, in order to ensure the stability of the product, during the casting process, the rectangular flange is set at the bottom and the circular flange is set at the side.
[0031] The lower template 2, the right template 3, the left template 4, and the front template 5 are all made of metal. The lengths of the right template 3 and the left template 4 in the front-to-back direction are the same.
[0032] like Fig.10 As shown, a rectangular groove 61 is formed on the lower surface of the sand core 6 , a water spray slot 63 is formed on the inner surface of the rectangular groove 61 , and the output end of the water spray assembly 7 is plugged into the water spray slot 63 .
[0033] After the casting work is completed, water can flow into the water spray slot 63 through the output end of the water spray assembly 7, that is, the water spray pipe 73, so that the water penetrates from the inside, which can effectively accelerate the penetration speed and improve the uniformity of the penetration effect, thereby simplifying the sand core removal process and significantly improving the demolding efficiency.
[0034] Specifically, if Figure 6As shown, the upper surface of the lower template 2 is symmetrically fixed with limit blocks 21, the front and rear sides of the upper surface of the lower template 2 are fixedly installed with a front template positioning block 22, the upper surface of the lower template 2 is provided with a rectangular cavity 23 corresponding to the rectangular groove 61, the middle part of the inner surface of the rectangular cavity 23 is fixedly installed with a sand core positioning block 24, the inner surface of the rectangular cavity 23 is provided with a through hole 25 corresponding to the water spray slot 63, the inner cavity side surface of the rectangular cavity 23 is provided with a drainage port 26, and the upper surface of the lower template 2 is provided with a pouring port 27.
[0035] The limit blocks 21 are used to limit the positions of the right template 3, the left template 4 and the front template 5. The distance between the limit blocks 21 on both sides is the same as the overall length in the front-to-back direction of the right template 3, the left template 4 and the front template 5 after splicing and assembling.
[0036] The front template positioning block 22 is used to position the front template 5, and then to position the right template 3 and the left template 4. The sand core positioning block 24 is used to position the sand core 6, and finally a cavity is formed between the lower template 2, the right template 3, the left template 4, the front template 5 and the sand core 6.
[0037] In the process of wetting the sand core by the water spraying method, water flows into the water spray slot 63 , and part of the water flows down while penetrating. Therefore, the rectangular cavity is designed to collect the flowing water and discharge it through the drain port 26 .
[0038] The pouring port 27 is evenly arranged in the space between the right mold plate 3, the left mold plate 4, the front mold plate 5 and the sand core 6. The low-pressure casting process is adopted to evenly and stably inject the molten metal into the mold cavity, thereby improving the product qualification rate.
[0039] Specifically, if Figure 7 As shown, the right template 3 and the left template 4 are placed between the limiting blocks 21 on the lower template 2 , a right template positioning block 31 is integrally formed on the front surface of the right template 3 , and a slot 32 is opened on the side surface of the right template 3 .
[0040] like Figure 8 As shown, a left template positioning block 41 is integrally formed on the front surface of the left template 4 , and an inserting block 42 matching the slot 32 is integrally formed on the side surface of the left template 4 .
[0041] The right template 3 and the left template 4 are spliced and assembled together through the cooperation of the slot 32 and the insert block 42 .
[0042] Specifically, if Fig. 9 As shown, positioning grooves 51 are symmetrically provided on the left and right sides of the rear surface of the front template 5, and the right template positioning block 31 and the left template positioning block 41 are respectively inserted into the positioning grooves 51, and a front template positioning groove 52 corresponding to the front template positioning block 22 is provided on the lower surface of the front template 5.
[0043] Through the cooperation of the positioning slot 51 and the right template positioning block 31 and the left template positioning block 41, the front template 5 can limit the position of the right template 3 and the left template 4 to ensure that the right template 3 and the left template 4 are tightly fitted.
[0044] Specifically, if Fig.10 As shown, a sand core positioning groove 62 matching with the sand core positioning block 24 is formed on the lower surface of the sand core 6 .
[0045] Specifically, if Figure 3 and Figure 5 As shown, the water spray assembly 7 includes a hydraulic cylinder 71, a mounting block 72, a water spray pipe 73 and a water diversion pipe 74. The mounting block 72 is fixedly mounted on the output end of the hydraulic cylinder 71, the water spray pipe 73 is fixedly mounted on the upper surface of the mounting block 72, and the water spray pipe 73 passes through the through hole 25 and is inserted into the water spray slot 63. A plug is provided at the upper end of the water spray pipe 73, and water outlets are evenly opened on the outer peripheral surface of the water spray pipe 73. A water diversion pipe 74 is fixedly mounted on the front surface of the mounting block 72, and the water diversion pipe 74 is connected to the water spray pipe 73.
[0046] The water diversion pipe 74 is connected to an external water source.
[0047] The water spray pipe 73 has the same diameter as the water spray slot 63 . The water spray pipe 73 is inserted into the water spray slot 63 , and can also provide auxiliary support for the sand core 6 , thereby ensuring the stability of the structure and shape of the sand core 6 during the casting process.
[0048] When installing the sand core 6, the water spray pipe 73 needs to be inserted into the water spray slot 63 to assist in positioning. After casting is completed, water is injected into the water spray pipe 73 through the water guide pipe 74. The water will flow out from the water outlet and penetrate into the sand core 6. Compared with the conventional water spraying method of spraying water from the side of the inner core, this method can achieve faster water penetration in the sand core 6 and improve work efficiency.
[0049] In addition, a nozzle connected to an external water source can be arranged in the rectangular cavity 23 to realize water spraying on the lower surface of the sand core 6. After the front template 5 is removed, the sand core 6 can also be sprayed from the side to further improve the efficiency of water penetration.
[0050] The use of this metal mold is as follows:
[0051] Assembly process
[0052] Place the sand core 6 on the lower template 2, so that the sand core positioning groove 62 is connected to the sand core positioning block 24, and the upper end of the water spray pipe 73 is inserted into the water spray slot 63;
[0053] Place the right template 3 and the left template 4 on both sides of the sand core 6 and splice them together, while ensuring that the right template 3 and the left template 4 are located between the limit blocks 21 on the front and rear sides;
[0054] Move the front template 5 downward along the front surfaces of the right template 3 and the left template 4, so that the right template positioning block 31 and the left template positioning block 41 are respectively inserted into the positioning slide grooves 51 on both sides, and continue to move the front template 5 downward so that the front template positioning groove 52 of the front template 5 is docked with the front template positioning block 22, and the mold assembly process is completed.
[0055] Casting process
[0056] The hydraulic cylinder 71 is operated to drive the water spray pipe 73 to move upward until the water spray pipe 73 moves to the highest position in the water spray slot 63;
[0057] Molten metal is poured from the pouring port 27 to perform pouring. After the pouring is completed, the metal is cooled and formed.
[0058] Demolding process
[0059] After the part is formed, first move up to remove the front template 5, and then move to both sides to remove the right template 3 and the left template 4;
[0060] Water is injected into the water spray pipe 73 through the water diversion pipe 74, and the water flows out from the water outlet and penetrates into the sand core 6. After a certain amount of water is injected, the hydraulic cylinder 71 is operated to drive the water spray pipe 73 to move downward;
[0061] After standing for a while, the part and the sand core 6 are moved upward and removed from the lower template 2, and then the sand core is taken out to complete the demoulding work and obtain the part.
[0062] The above contents are only preferred embodiments of the present invention. For ordinary technicians in this field, many changes can be made in the specific implementation methods and application scopes based on the ideas of the present invention. As long as these changes do not deviate from the concept of the present invention, they all belong to the protection scope of the present invention.
Claims
1. A metal mold for transitioning a circular flange and a rectangular flange into a 90-degree shell, characterized in that: It includes a base, a lower template, a right template, a left template, a front template, a sand core and a water spray assembly. The lower template is fixedly installed on the base through a column. The front template and the sand core are assembled on the upper surface of the lower template. The right template and the left template are assembled on the rear surface of the front template after being spliced, and the right template and the left template are placed on the lower template. The water spray assembly is assembled on the upper surface of the base, and the output end of the water spray assembly acts on the sand core. A rectangular groove is formed on the lower surface of the sand core, a water spray slot is formed on the inner surface of the rectangular groove, and the output end of the water spray component is plugged into the water spray slot.
2. A metal mold for transitioning a circular flange and a rectangular flange into a 90-degree shell according to claim 1, characterized in that: The upper surface of the lower template is symmetrically fixed with limit blocks in the front and rear, the front template positioning block is fixedly installed on the front side of the upper surface of the lower template, the upper surface of the lower template is provided with a rectangular cavity corresponding to the rectangular groove, a sand core positioning block is fixedly installed in the middle of the inner surface of the rectangular cavity, the inner surface of the rectangular cavity is provided with a through hole corresponding to the water spray slot, the inner cavity side surface of the rectangular cavity is provided with a drainage port, and the upper surface of the lower template is provided with a pouring port.
3. A metal mold for transitioning a circular flange and a rectangular flange into a 90-degree shell according to claim 2, characterized in that: The right template and the left template are placed between the limiting blocks on the lower template, the front surface of the right template is integrally formed with a right template positioning block, and the side surface of the right template is provided with a slot; A left template positioning block is integrally formed on the front surface of the left template, and an inserting block matching the slot is integrally formed on the side surface of the left template.
4. A metal mold for transitioning a circular flange and a rectangular flange into a 90-degree shell according to claim 3, characterized in that: The rear surface of the front template is symmetrically provided with positioning grooves on the left and right sides, and the right template positioning block and the left template positioning block are respectively inserted into the positioning grooves, and the lower surface of the front template is provided with a front template positioning groove corresponding to the front template positioning block.
5. A metal mold for transitioning a circular flange and a rectangular flange into a 90-degree shell according to claim 2, characterized in that: The lower surface of the sand core is provided with a sand core positioning groove which matches the sand core positioning block.
6. A metal mold for transitioning a circular flange and a rectangular flange into a 90-degree shell according to claim 2, characterized in that: The water spray assembly includes a hydraulic cylinder, a mounting block, a water spray pipe and a water diversion pipe. The mounting block is fixedly mounted on the output end of the hydraulic cylinder, the water spray pipe is fixedly mounted on the upper surface of the mounting block, and the water spray pipe passes through the through hole and is inserted into the water spray slot. A plug is provided at the upper end of the water spray pipe, and water outlets are evenly opened on the outer peripheral surface of the water spray pipe. A water diversion pipe is fixedly mounted on the front surface of the mounting block, and the water diversion pipe is connected to the water spray pipe.