Flange casting mold with replaceable core

Abstract

The utility model relates to sand mould foundry moulding frock technical field, and disclose a kind of flange casting mould with replaceable core, including wooden mould main body, pump body forming part is equipped on the wooden mould main body, insert slot is opened in the wooden mould main body, insert block is connected in the insert slot, the top of the insert block is fixedly installed with flange forming insert block, the bottom of the insert block is fixedly installed with protruding block, limit slot and round groove are opened in the wooden mould main body, the fixed assembly of locking protruding block is equipped in the wooden mould main body.The utility model can replace flange forming insert block alone, adapt multiple flange specifications, reduce frock cost, shorten change type cycle;Locking structure is built-in, wooden mould outer wall is smooth, sand is not easy to accumulate in sand filling, and stripping will not scratch sand mould, reduce casting waste product;Two-way plug locking can prevent insert block deviation, eliminate assembly gap, reduce casting flash, change type operation is simple and labor-saving, improve moulding operation efficiency.

Description

Technical Field

[0001] This utility model relates to the field of sand casting molding tooling technology, specifically a flange casting mold with replaceable core. Background Technology

[0002] Sand casting relies on wooden molds as molding tools. The wooden mold is placed inside the sand box, filled with sand, compacted, and then demolded to form a sand mold. Subsequently, molten metal is poured into the sand mold to obtain the pump body flange casting. The wooden mold is only used to make sand molds and does not directly contact the high-temperature molten metal. It is an indispensable tool in the sand casting production process.

[0003] Currently, most traditional flange casting wooden molds adopt an integrated, complete structure, and the flange forming area cannot be disassembled and replaced separately. If pump body castings with different flange specifications need to be produced, the entire set of wooden molds must be reprocessed, which not only increases the tooling manufacturing cost but also extends the preparation cycle for product changeover, failing to meet the demand for flexible production of multi-specification castings.

[0004] To address the above issues, a flange casting mold with a replaceable core is proposed. Utility Model Content

[0005] The purpose of this utility model is to provide a flange casting mold with a replaceable core, so as to solve the problems mentioned in the background art that the flange part of the traditional one-piece flange casting wooden mold cannot be replaced separately, the tooling investment cost is high, and the changeover cycle is long.

[0006] This utility model provides the following technical solution: a flange casting mold with replaceable core, including a wooden mold body, a pump body forming part on the wooden mold body, an insert groove in the wooden mold body, an embedded insert in the insert groove, a flange forming insert fixedly installed on the top of the embedded insert, a protrusion fixedly installed on the bottom of the embedded insert, a limit groove and a circular groove in the wooden mold body, and a fixing component for locking the protrusion in the wooden mold body.

[0007] Preferably, the bottom surface of the protrusion abuts against the bottom wall of the groove, and slots are symmetrically provided on both sides of the protrusion.

[0008] Preferably, the fixing component includes two screws rotatably installed in the circular groove. The two screws are rotatably engaged with the wooden mold body. Each of the two screws has a hexagonal groove at its outer end away from the docking end, and a hexagonal knob is snapped into the hexagonal groove.

[0009] Preferably, the threads of the two screws are in opposite directions, and each screw is threadedly connected to a sliding post. The sidewalls of the two sliding posts are fixedly fitted with insert blocks, which are engaged with the slots.

[0010] Preferably, the sliding column is slidably engaged with the limiting groove, and a guide rod is fixedly installed in the limiting groove, with the sliding column and the guide rod slidably engaged.

[0011] Preferably, a protrusion is fixedly installed on the inner mating end of one of the screws, and a groove is opened on the inner mating end of the other screw. The protrusion and the groove are inserted and matched. The outer walls of the mating ends of the two screws that are close to each other are provided with external threads. A nut is connected to the common thread on the external threads. The two screws are locked into a whole structure by the nut.

[0012] Preferably, the pump body forming part is integrally formed with the wooden mold body, and the end side of the flange forming insert is adapted to the end side of the pump body forming part.

[0013] This utility model has the following beneficial effects: This mold allows for the individual disassembly and replacement of flange forming inserts, and can be adapted to various flange specifications for molding operations. It eliminates the need to make a complete set of wooden molds for different flanges, effectively reducing tooling production costs, shortening the production preparation cycle for product changeovers, and improving the flexibility of casting production.

[0014] The mold fixing component is housed inside the wooden mold body. The outer wall is flat and has no protruding parts. When the sand is placed in the sand box for sand filling, the molding sand will not accumulate. During the demolding process, the sand mold cavity will not be scratched or damaged, reducing the scrap of sand molds and lowering the casting scrap rate.

[0015] The flange insert of this mold can be easily locked and loosened by simply assembling and rotating the hexagonal knob. The replacement process is simple and labor-saving, without the need to disassemble the entire wooden mold body, reducing the labor intensity of operators and improving the efficiency of mold changeover.

[0016] This mold eliminates the assembly gap between the insert and the slot through the fixing components. When filling the molding sand, the molding sand cannot seep into the splice gap, reducing the generation of flash and burrs at the flange position of the casting and improving the appearance and forming quality of the casting.

[0017] The mold can be placed into the sand box to complete the molding process, which is compatible with the conventional production process of sand casting. The only tooling component that is easily worn is the flange insert, which can extend the overall service life of the wooden mold body. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the present invention. Figure 1 .

[0019] Figure 2 This is a schematic diagram of the overall structure of the present invention. Figure 2 .

[0020] Figure 3 This is an overall sectional view of the present invention.

[0021] Figure 4 This is a schematic diagram of the flange forming insert replacement structure of this utility model.

[0022] Figure 5 This is a schematic diagram of the fixing component structure of this utility model.

[0023] In the diagram: 1. Wooden mold body; 2. Pump body forming part; 3. Flange forming insert; 4. Embedded insert; 41. Protrusion; 42. Slot; 5. Insert groove; 6. Limiting groove; 7. Circular groove; 8. Fixing component; 81. Screw; 82. Hexagonal groove; 83. Hexagonal knob; 84. Sliding column; 85. Insert block; 86. Guide rod; 87. Protrusion; 88. Groove; 89. External thread; 810. Nut. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] Example: This example aims to address the problems of non-replaceable flange specifications in traditional casting wooden molds and the protrusion of external locking components causing sand box scraping against the mold cavity during demolding. Please refer to [link / reference]. Figure 1 - Figure 5 A flange casting mold with a replaceable core includes a wooden mold body 1, a pump body forming part 2 on the wooden mold body 1, an insert groove 5 inside the wooden mold body 1, an embedded insert 4 snapped into the insert groove 5, a flange forming insert 3 fixedly installed on the top of the embedded insert 4, and a protrusion 41 fixedly installed on the bottom of the embedded insert 4. A limit groove 6 and a circular groove 7 are formed inside the wooden mold body 1. The bottom surface of the protrusion 41 abuts against the bottom wall of the groove 5. Slots 42 are symmetrically opened on both sides of the protrusion 41. The pump body forming part 2 is integrally formed with the wooden mold body 1. The end side of the flange forming insert 3 is adapted to the end side of the pump body forming part 2.

[0026] Please see Figure 3 - Figure 5 The wooden mold body 1 is provided with a fixing component 8 with locking protrusion 41. The fixing component 8 includes two screws 81 rotatably installed in the circular groove 7. The two screws 81 are rotatably engaged with the wooden mold body 1. Each of the two screws 81 has a hexagonal groove 82 at its outer end away from the docking end. A hexagonal knob 83 is snapped into the hexagonal groove 82.

[0027] The threads of the two screws 81 are turned in opposite directions. Each screw 81 is threaded with a sliding post 84. The side walls of the two sliding posts 84 are fixedly installed with inserts 85, which are inserted into the slots 42.

[0028] The sliding column 84 is slidably engaged with the limiting groove 6, and the guide rod 86 is fixedly installed in the limiting groove 6. The sliding column 84 and the guide rod 86 are slidably engaged.

[0029] One of the screws 81 has a protrusion 87 fixedly installed on the inner mating end, and the other screw 81 has a groove 88 on the inner mating end. The protrusion 87 and the groove 88 are inserted into each other. The outer walls of the mating ends of the two screws 81 that are close to each other are provided with external threads 89. A nut 810 is connected to the common thread on the external threads 89. The two screws 81 are locked into a whole structure by the nut 810.

[0030] In this embodiment: when processing the wooden mold body 1, the limiting groove 6 and the circular groove 7 penetrating the left and right sides of the wooden mold are integrally formed. The internal space of the limiting groove 6 is sufficient for the operator to reach in and complete assembly operations such as sliding and tightening of the nut 810. When assembling the fixing component 8, the two sliding pillars 84 are first respectively fitted onto the outside of the guide rod 86, with the insert 85 on the sliding pillar 84 facing the groove 5 side, completing the pre-assembly of the sliding pillar 84 and the guide rod 86. The pre-assembled sliding pillar 84 and guide rod 86 are then vertically inserted into the limiting groove 6 from the opening of the limiting groove 6 above the wooden mold body 1, completing the pre-assembly positioning of the sliding pillar 84 and the guide rod 86.

[0031] Then, take one of the screws 81, whose inner mating end has a groove 88, and whose outer end has a hexagonal groove 82 and is fitted with a hexagonal knob 83. With the help of the hexagonal knob 83, screw the screw 81 into the round groove 7 on one side of the wooden mold, so that the screw 81 and the sliding column 84 on the same side are threaded into place. Then, the operator puts the locking nut 810 into the mating end of the screw 81 through the opening of the top limiting groove 6, and then pushes the nut 810 to slide it outward along the screw 81 body, away from the mating end face on the inner side of the screw 81, and temporarily stores it on the screw 81 body, leaving room for mating, so as not to hinder the subsequent assembly of the other screw 81.

[0032] Then take another screw 81, whose inner mating end is provided with a matching protrusion 87, and the outer end is also equipped with a hexagonal knob 83. It is screwed in through the other side circular groove 7 and threaded into the corresponding sliding post 84. Continue to rotate the two screws 81 inward until the protrusion 87 at the ends of the two screws 81 are fully inserted and aligned with the groove 88.

[0033] Then, the operator inserts the locking nut 810, which is pre-fitted on the screw 81, through the opening of the top limiting groove 6 and slides it to the external thread 89 area of ​​the mating end of the two screws 81. The locking nut 810 is rotated in the forward direction, so that the nut 810 simultaneously engages with the external threads 89 of the two screws 81, locking the two screws 81 into a single synchronous transmission structure. The entire assembly process is carried out in steps. The nut 810 is pre-installed and retracted in advance, so as not to interfere with the mating of the two screws 81. The limiting groove 6 provides operating space to facilitate the adjustment and locking of the nut 810, and there is no assembly interference problem. After the assembly is completed, the single-sided hexagonal knob 83 can be removed as needed, and only the single-sided hexagonal knob 83 is retained for subsequent insert locking and disassembly operations.

[0034] Next, select the flange forming insert 3 that meets the production requirements, and put the insert 4 together with the flange forming insert 3 into the groove 5 inside the wooden mold body 1, so that the protrusion 41 at the bottom of the insert 4 fits against the bottom wall of the groove 5, and at the same time, make the end face of the flange forming insert 3 fit against the end face of the pump body forming part 2, thus completing the initial placement and positioning of the insert 4; the two screws 81, the sliding column 84, the insert block 85 and the guide rod 86 are all arranged and stored inside the wooden mold body 1, with only the hexagonal knob 83 on one side being stuck at the end of the screw 81 and protruding from the side wall of the wooden mold. There are no protruding pressing components on the outer surface of the wooden mold body 1, and the overall outer wall remains flat.

[0035] Then, rotate the exposed hexagonal knob 83 in the forward direction. The hexagonal knob 83 drives the corresponding screw 81 to rotate. The two screws 81 are positioned by inserting the protrusion 87 into the groove 88 and are locked together by the common nut 810 to form an integral structure. When one screw 81 rotates, it can drive the other screw 81 to rotate together. The threads of the two screws 81 are opposite. During the rotation of the screws 81, they can drive their respective corresponding sliding pins 84 to move horizontally towards the middle along the guide rod 86 inside the limiting groove 6. The insert 85 fixed on the side wall of the sliding pin 84 moves synchronously with the sliding pin 84 and is inserted into the slots 42 opened on both sides of the protrusion 41. The insert 85 on both sides forms a bidirectional limiting on the protrusion 41, and the embedded insert 4 is firmly locked and fixed.

[0036] The guide rod 86 can constrain the slide column 84 to only make horizontal translation, preventing the slide column 84 from rotating with the screw 81. The thread itself has a self-locking effect. After the hexagonal knob 83 is stopped, the position of the slide column 84 will not shift on its own, which can effectively prevent the embedded insert 4 from shifting or rotating during molding vibration. After the insert 85 is fully inserted into the slot 42, it can also eliminate the assembly gap between the embedded insert 4 and the slot 5, preventing molding sand from seeping into the gap during molding sand filling, and reducing the flash and burrs generated at the flange position after the casting is formed.

[0037] After the locking operation is completed, remove the exposed hexagonal knob 83 from the hexagonal slot 82 to eliminate the protruding structure on the side wall. Then, place the entire wooden mold body 1 into the sand box, fill the sand box with molding sand, and complete the compaction and vibration operations. The entire wooden mold is only used as a molding tool. The built-in locking structure will not obstruct the sand filling operation, and the flat outer wall will not easily accumulate molding sand. After all the molding processes are completed, completely demold the entire wooden mold body 1 from the sand box. A complete pump body flange cavity will be formed inside the sand box. The subsequent molten metal pouring operation will only be carried out inside the sand mold after demolding. The wooden mold body 1 will not come into contact with the high-temperature molten metal. The flat and unprotruding outer wall will not scratch or damage the sand mold cavity during the demolding process.

[0038] If it is necessary to change to a flange of other specifications for production, align the hexagonal knob 83 with the hexagonal groove 82 on the outside of the screw 81 to complete the snap-fit ​​assembly. Then rotate the hexagonal knob 83 in the opposite direction. The hexagonal knob 83 drives the corresponding screw 81 to rotate in the opposite direction. The two screws 81 move in sync. The reverse thread will drive the sliding pins 84 on both sides to slide outward along the guide rod 86. The sliding pins 84 drive the insert 85 to completely disengage from the slots 42 on both sides of the protrusion 41, releasing the clamping limit on the embedded insert 4. After the limit is released, directly remove the embedded insert 4 and the flange forming insert 3 upward. Then put the new specification corresponding embedded insert 4 and flange forming insert 3 into the insert groove 5, reassemble the hexagonal knob 83 and rotate to lock. After locking, remove the hexagonal knob 83 again to complete the insert replacement. The entire replacement process does not require disassembly or removal of the wooden mold body 1.

[0039] 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 process, method, article, or apparatus.

[0040] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A flange casting mold with a replaceable core, comprising a wooden mold body (1), characterized in that: The wooden mold body (1) is provided with a pump body forming part (2), the wooden mold body (1) is provided with a groove (5), the groove (5) is fitted with an embedded insert (4), the top of the embedded insert (4) is fixedly installed with a flange forming insert (3), the bottom of the embedded insert (4) is fixedly installed with a protrusion (41), the wooden mold body (1) is provided with a limiting groove (6) and a circular groove (7), and the wooden mold body (1) is provided with a fixing component (8) for locking the protrusion (41).

2. The flange casting mold with replaceable core according to claim 1, characterized in that: The bottom surface of the protrusion (41) abuts against the bottom wall of the groove (5), and slots (42) are symmetrically provided on both sides of the protrusion (41).

3. The flange casting mold with replaceable core according to claim 2, characterized in that: The fixing component (8) includes two screws (81) rotatably installed in the circular groove (7). The two screws (81) are rotatably engaged with the wooden mold body (1). Each of the two screws (81) has a hexagonal groove (82) at its outer end away from the docking end. A hexagonal knob (83) is snapped into the hexagonal groove (82).

4. A flange casting mold with a replaceable core according to claim 3, characterized in that: The two screws (81) have opposite threads, and each screw (81) is threaded with a sliding post (84). The sidewalls of the two sliding posts (84) are fixedly fitted with inserts (85), and the inserts (85) are engaged with the slots (42).

5. A flange casting mold with a replaceable core according to claim 4, characterized in that: The sliding column (84) is slidably engaged with the limiting groove (6), and a guide rod (86) is fixedly installed in the limiting groove (6). The sliding column (84) and the guide rod (86) are slidably engaged.

6. A flange casting mold with a replaceable core according to claim 5, characterized in that: One of the screws (81) has a protrusion (87) fixedly installed on the inner mating end, and the other screw (81) has a groove (88) on the inner mating end. The protrusion (87) and the groove (88) are inserted into each other. The outer walls of the mating ends of the two screws (81) that are close to each other are provided with external threads (89). A nut (810) is connected to the external threads (89) through a common thread. The two screws (81) are locked into a whole structure by the nut (810).

7. A flange casting mold with a replaceable core according to claim 1, characterized in that: The pump body forming part (2) is integrally formed with the wooden mold body (1), and the end side of the flange forming insert (3) is adapted to the end side of the pump body forming part (2).

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