Combined sand core manufacturing mold and core manufacturing method

Abstract

The invention relates to the field of core making molds, in particular to a combined type sand core making mold and a core making method.The combined type sand core making mold comprises a supporting bottom plate, a plurality of supporting rods are fixedly connected to one side of the supporting bottom plate, a combined type mold is fixedly connected to one ends of the supporting rods, and the combined type mold comprises a bottom mold plate and a plurality of side mold plates; the bottom template is fixedly connected with the multiple supporting rods, each side template is in sliding insertion connection with the bottom template, and an L-shaped positioning block used for limiting sliding of the side templates is in sliding insertion connection between every two adjacent side templates; the mold has the beneficial effects that protective gas is guided into the inner side of the mold through the inflation pump, so that the sand core and the mold are separated as much as possible, then the side mold plate vibrates, the sand core cannot be damaged through vibration, the side mold plate can be separated from the sand core in the vibration process, and therefore the safety of the sand core is guaranteed as much as possible, and demolding is very convenient.

Description

Technical Field

[0001] The invention relates to the field of core making moulds, in particular to a combined sand core making mould and a core making method. Background Art

[0002] Sand core is a key component used to form internal cavities or complex shapes of castings during the casting process. It is usually made of a mixture of high-temperature resistant sand and a binder to support the internal shape of the casting during the casting process.

[0003] At present, sand grains and a binder are usually introduced into a combined mold, and the sand core is pressed into shape by an upper mold and a lower mold.

[0004] However, since the sand core may be bonded to a part of the mold, the bonding area between the sand core and the mold may be damaged during demolding. Therefore, the present invention proposes a combined sand core making mold and a core making method to solve the above problem. Summary of the invention

[0005] The object of the present invention is to provide a combined sand core core making mold and a core making method to solve the problem raised in the above background technology that the sand core may be bonded to a part of the mold, resulting in the sand core and the mold bonding area being damaged during demolding.

[0006] To achieve the above object, the present invention provides the following technical solution: a combined sand core making mold, the combined sand core making mold comprising:

[0007] A support base plate, one side of which is fixedly connected to a plurality of support rods, one end of which is fixedly connected to a combined mold, the combined mold comprising a bottom mold plate and a plurality of side mold plates, the bottom mold plate and the plurality of support rods are fixedly connected, each of the side mold plates is slidably plugged with the bottom mold plate, and a positioning block in an "L" shape is slidably plugged between two adjacent side mold plates to limit the sliding of the side mold plates;

[0008] An adjusting bolt is threadedly inserted at one end of the bottom template, and a sealing slide is rotatably connected to one end of the adjusting bolt. An air inlet is opened on one side of the bottom template, and the sealing slide and the bottom template are slidably inserted in the air inlet. An air pump is inserted and fixed at one end of the bottom template, and the air pump is fixedly connected to the supporting bottom plate;

[0009] One side of the side template is slidably connected to a mounting rod arranged in an "I" shape, and both sides of the mounting rod are fixedly connected to a plurality of connecting plates distributed in a linear array, one side of the connecting plate is fixedly connected to a plurality of No. 1 protrusions, and a plurality of No. 2 springs are fixedly connected between each of the connecting plates and the side template, and one side of the side template is fixedly connected to a plurality of No. 2 protrusions corresponding to the positions of the No. 1 protrusions.

[0010] Preferably, one side of the air inlet is connected to an air storage cavity, one side of the bottom template is plugged and fixed with a pressure relief valve, and one end of the pressure relief valve is located in the air inlet.

[0011] Preferably, an air guide tube is plugged and fixed on one side of the air inlet, and the air guide tube is fixedly connected to the air pump.

[0012] Preferably, a reinforcement block is fixedly connected to one side of the bottom template, and a thread groove for threaded insertion of an adjusting bolt is formed at one end of the reinforcement block, and the thread groove is communicated with the air inlet.

[0013] Preferably, a telescopic rod is fixedly connected to one side of the reinforcement block, one end of the telescopic rod is fixedly connected to a baffle plate arranged in an "L" shape and used to limit the sliding of the adjusting bolt, a No. 1 spring is fixedly connected between the baffle plate and the reinforcement block, one end of the adjusting bolt is fixedly connected to a limit plate, the limit plate is located in the inner cavity of the sealing slide plate and is rotatably connected to the sealing slide plate.

[0014] Preferably, a plurality of No. 1 slide grooves arranged in a "T" shape are provided on the side of the bottom template, and a plurality of sliders are fixedly connected to the side of each of the side templates, and the sliders are correspondingly plugged into the No. 1 slide grooves.

[0015] Preferably, a second slide groove for sliding installation of the installation rod is opened on one side of the side template, and the second slide groove is located at the central axis of the side template and is symmetrically arranged with the symmetry axis of the side template as the center line.

[0016] Preferably, a plurality of grooves are opened on one side of the side template, and a plurality of the No. 2 protrusions are correspondingly located on one side of each groove, the connecting plate and the side template are slidably connected to the grooves, and the No. 1 protrusions and No. 2 springs are both located in the grooves.

[0017] Preferably, two symmetrically arranged positioning grooves are provided at one end of the side template, and two positioning slide blocks arranged in a "T" shape are fixedly connected to the side surface of the positioning block, and the positioning slide blocks are slidably plugged into the positioning grooves.

[0018] A core making method comprises the above-mentioned combined sand core making mould.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] The present invention first uses an air pump to introduce protective gas into the inner side of the mold during demoulding. The protective gas will diffuse along the gap between the sand core and the mold to separate the sand core and the mold as much as possible. Then the positioning block is pulled out to make each side template independent of each other. Then the side templates are slid out of the bottom template one by one. If there is still a bonding point between a side template and the sand core, the mounting rod is controlled to slide and the No. 2 spring on the mounting rod is compressed. Then the No. 2 spring will push the mounting rod and multiple connecting plates on the mounting rod to slide when it rebounds, so that multiple No. 1 protrusions on the connecting plate collide with multiple No. 2 protrusions on the side template, thereby causing the side template to vibrate. The amplitude of this vibration is mainly concentrated on the side template and the vibration is mainly in the direction parallel to the side of the sand core. At the same time, the amplitude of the vibration generated in this way is also small, which will not damage the sand core and can also separate the side template from the sand core during vibration, thereby ensuring the safety of the sand core as much as possible and making demoulding very convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a three-dimensional schematic diagram of the overall structure of the present invention;

[0022] Figure 2 It is a side schematic diagram of the overall structure of the present invention;

[0023] Figure 3 It is a side sectional schematic diagram of the overall structure of the present invention;

[0024] Figure 4 It is a side schematic diagram of the bottom template structure of the present invention;

[0025] Figure 5 It is a side sectional schematic diagram of the bottom template structure of the present invention;

[0026] Figure 6 It is a side schematic diagram of the side formwork structure of the present invention;

[0027] Figure 7 It is a side schematic diagram of the mounting rod structure of the present invention;

[0028] Figure 8 It is a side schematic diagram of the positioning block structure of the present invention.

[0029] In the figure: 1. Support base plate; 11. Support rod; 2. Bottom template; 21. Reinforcement block; 22. Telescopic rod; 23. Baffle; 24. Spring No. 1; 25. Air storage chamber; 26. Air inlet; 27. Slide No. 1; 28. Threaded groove; 3. Side template; 31. Slide No. 2; 32. Groove; 33. Positioning groove; 34. Slider; 4. Adjusting bolt; 41. Sealing slide plate; 42. Limiting plate; 5. Air pump; 51. Air guide tube; 6. Pressure relief valve; 7. Positioning block; 71. Positioning slide block; 8. Mounting rod; 81. Connecting plate; 82. Bump No. 1; 83. Spring No. 2; 9. Bump No. 2. DETAILED DESCRIPTION

[0030] In order to make the purpose and technical solution of the present invention clearly and completely described, and the advantages more clearly understood, the embodiments of the present invention are further described in detail with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are part of the embodiments of the present invention, rather than all of the embodiments, and are only used to explain the embodiments of the present invention, and are not used to limit the embodiments of the present invention. All other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] See also Figures 1 to 8 , the present invention provides a technical solution:

[0032] Embodiment 1, a combined sand core making mold, the combined sand core making mold comprises: a supporting base plate 1, and a combined mold.

[0033] Specifically, a plurality of support rods 11 are fixedly connected to one side of the support base plate 1, and a combined mold is fixedly connected to one end of the support rod 11. The support base plate 1 can provide support to the mold, and the support rod 11 can provide the mold with an installation height, so that other components can be installed better. The combined mold includes a bottom template 2 and a plurality of side templates 3. The bottom template 2 and the plurality of support rods 11 are fixedly connected, and each side template 3 is slidably plugged with the bottom template 2. A positioning block 7 that is used to limit the sliding of the side template 3 and is arranged in an "L" shape is slidably plugged between two adjacent side templates 3. By slidingly inserting the plurality of side templates 3 into the bottom template 2, and then connecting the plurality of side templates 3 together using the plurality of positioning blocks 7, the side templates 3 are limited to continue sliding, and the bottom template 2 and the plurality of side templates 3 are combined into an integral mold. This not only makes it very convenient to clean the mold later, but also makes it easier to find the bonding point.

[0034] Secondly, an adjusting bolt 4 is threadedly inserted at one end of the bottom template 2, and a sealing plate 41 is rotatably connected at one end of the adjusting bolt 4. An air inlet 26 is provided on one side of the bottom template 2, and the sealing plate 41 and the bottom template 2 are slidably inserted in the air inlet 26. An air pump 5 is inserted and fixed at one end of the bottom template 2, and the air pump 5 is fixedly connected to the supporting bottom plate 1. After the sand core is formed, the sealing plate 41 is controlled to slide by rotating the adjusting bolt 4, so as to open the air inlet 26, and then the air pump 5 inputs protective gas into the mold through the air inlet 26, and the gas will break through the obstruction of the bonding along the gap, so that the mold and the sand core can be better separated;

[0035] Furthermore, one side of the side template 3 is slidably connected to a mounting rod 8 arranged in an "I" shape, and both sides of the mounting rod 8 are fixedly connected to a plurality of connecting plates 81 distributed in a linear array, and one side of the connecting plate 81 is fixedly connected to a plurality of No. 1 protrusions 82, and a plurality of No. 2 springs 83 are fixedly connected between each connecting plate 81 and the side template 3, and one side of the side template 3 is fixedly connected to a plurality of No. 2 protrusions 9 corresponding to the positions of the No. 1 protrusions 82. After the protective gas passes through, the positioning block 7 can be pulled out of the side template 3, and then the side template 3 can be fixedly connected. The bottom template 2 is pulled out one by one, so when there is still a bonding point between a side template 3 and the sand core, it will be discovered directly, and then the connecting plate 81 is pressed to compress the No. 2 spring 83, and then the pressure on the mounting rod 8 is released to allow the No. 2 spring 83 to push the No. 1 protrusion 82 to slide under its own elastic action. After sliding, the No. 1 protrusion 82 can contact and collide with the No. 2 protrusion 9, so that the side template 3 produces effective and small-amplitude vibration, and the side template 3 is gradually separated from the sand core during vibration, thereby ensuring the safety of the sand core.

[0036] In order to further ensure the safety of the sand core, one side of the air inlet 26 of the present application is connected to the air storage chamber 25, and a pressure relief valve 6 is inserted and fixed on one side of the bottom template 2, and one end of the pressure relief valve 6 is located in the air inlet 26. In this way, the gas in the mold can be discharged from the air inlet 26 when the pressure reaches the threshold that the sand core can withstand, thereby preventing the sand core from deforming due to excessive pressure.

[0037] In order to facilitate the installation of the air pump 5, an air guide tube 51 is inserted and fixed on one side of the air inlet 26 of the present application. The air guide tube 51 is fixedly connected to the air pump 5. The air guide tube 51 allows the air pump 5 to be better installed on the supporting base plate 1.

[0038] In order to better install the adjusting bolt 4, a reinforcing block 21 is fixedly connected to one side of the bottom template 2 of the present application. The reinforcing block 21 can provide the adjusting bolt 4 with more connection surfaces. A thread groove 28 for threaded insertion of the adjusting bolt 4 is provided at one end of the reinforcing block 21. The thread groove 28 is connected to the air inlet 26. The adjusting bolt 4 can be threadedly installed on the bottom template 2 through the thread groove 28.

[0039] In order to further stabilize the adjusting bolt 4, a telescopic rod 22 is fixedly connected to one side of the reinforcing block 21 of the present application, and one end of the telescopic rod 22 is fixedly connected to a baffle 23 for limiting the sliding of the adjusting bolt 4 and arranged in an "L" shape. A No. 1 spring 24 is fixedly connected between the baffle 23 and the reinforcing block 21, and one end of the adjusting bolt 4 is fixedly connected to a limiting plate 42, which is located in the inner cavity of the sealing slide plate 41 and is rotatably connected to the sealing slide plate 41. The limiting plate 42 can better drive the sealing slide plate 41 to slide when the adjusting bolt 4 rotates. After the adjusting bolt 4 is rotated to slide the sealing slide plate 41 into the air inlet 26, the baffle 23 will block the adjusting bolt 4 after sliding under the action of the No. 1 spring 24, thereby effectively limiting the adjusting bolt 4 from sliding out of the reinforcing block 21, allowing the adjusting bolt 4 and the adjusting bolt 4 to be stably installed, thereby ensuring that the raw material will not leak into the air inlet 26.

[0040] In order to facilitate the precise installation of the side template 3, the side of the bottom template 2 of the present application is provided with a plurality of No. 1 slide grooves 27 arranged in a "T" shape, and a plurality of sliders 34 are fixedly connected to the side of each side template 3. The sliders 34 and the No. 1 slide grooves 27 are correspondingly plugged in. Through the sliding plug-in of the sliders 34 and the No. 1 slide grooves 27, the side template 3 can be accurately installed on the bottom template 2.

[0041] In order to facilitate the installation of the mounting rod 8, a No. 2 slide groove 31 for sliding installation of the mounting rod 8 is opened on one side of the side template 3 of the present application. The No. 2 slide groove 31 is located at the central axis of the side template 3 and is symmetrically arranged with the symmetry axis of the side template 3 as the center line. The No. 2 slide groove 31 can facilitate the sliding installation of the mounting rod 8 on the side template 3, and also allow the connecting plate 81 to be symmetrically installed, so that the vibration generated by the collision between the No. 1 protrusion 82 and the No. 2 protrusion 9 is more uniform.

[0042] In order to enhance the vibration effect borne by the side formwork 3, a plurality of grooves 32 are provided on one side of the side formwork 3 of the present application, and a plurality of No. 2 protrusions 9 are correspondingly located on one side of each groove 32. The connecting plate 81 and the side formwork 3 are slidably connected to the groove 32. The No. 1 protrusion 82 and the No. 2 spring 83 are both located in the groove 32. Through the groove 32, the vibration can be diffused from the middle part of the side formwork 3, thereby further enhancing the vibration effect. At the same time, the groove 32 can also facilitate the installation of the No. 2 protrusion 9, the connecting plate 81, the No. 1 protrusion 82 and the No. 2 spring 83.

[0043] In order to facilitate the installation of the positioning block 7, two symmetrically arranged positioning grooves 33 are opened at one end of the side template 3 of the present application, and two positioning sliders 71 arranged in a "T" shape are fixedly connected to the side of the positioning block 7. The positioning slider 71 and the positioning groove 33 are slidably plugged into each other. The positioning block 7 can be slidably installed on the side template 3 through the positioning groove 33 and the positioning slider 71, thereby connecting the two adjacent side templates 3 into a whole.

[0044] The present application also discloses a core making method, comprising any one of the above-mentioned combined sand core making molds.

[0045] In actual implementation, after the sand core is formed, the baffle 23 is first slid away from the adjusting bolt 4, and then the adjusting bolt 4 is turned to drive the sealing slide plate 41 to slide, so that the air inlet 26 leaks out, and then the air pump 5 is used to transport the protective gas to the inner cavity of the air storage chamber 25 through the air guide pipe 51. The protective gas will enter the mold cavity from the air inlet 26, and then diffuse from the gap between the sand core and the mold to open the bonding between the sand core and the mold as much as possible. After the output of the air pump 5 is completed, the air pump 5 is turned off, and then the positioning block 7 is pulled out of the side template 3, and then the side templates 3 are slid out of the bottom template 2 one by one. At this time, if there are side templates 3 still bonded to the sand core, the connecting plate 81 is compressed by the sliding mounting rod 8 to compress the No. 2 spring 83, and then the mounting rod 8 is loosened. The No. 2 spring 83 will push the No. 1 protrusion 82 to slide and collide with the No. 2 protrusion 9 under its own elastic action, so that the side template 3 produces effective and safe vibration. The vibration will gradually separate the side template 3 from the sand core without destroying the integrity of the sand core surface, which is very convenient.

[0046] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A combined sand core making mold, Features: The combined sand core making mold comprises: A support base plate (1), one side of the support base plate (1) is fixedly connected to a plurality of support rods (11), one end of the support rods (11) is fixedly connected to a combined mold, the combined mold comprises a bottom mold plate (2) and a plurality of side mold plates (3), the bottom mold plate (2) and the plurality of support rods (11) are fixedly connected, each of the side mold plates (3) is slidably plugged into the bottom mold plate (2), and a positioning block (7) arranged in an "L" shape is slidably plugged between two adjacent side mold plates (3) for limiting the sliding of the side mold plates (3); An adjusting bolt (4) is threadedly inserted at one end of the bottom template (2), and a sealing plate (41) is rotatably connected to one end of the adjusting bolt (4). An air inlet (26) is provided on one side of the bottom template (2), and the sealing plate (41) and the bottom template (2) are slidably inserted in the air inlet (26). An air pump (5) is inserted and fixed at one end of the bottom template (2), and the air pump (5) is fixedly connected to the supporting bottom plate (1); One side of the side template (3) is slidably connected to a mounting rod (8) arranged in an "I" shape, and both sides of the mounting rod (8) are fixedly connected to a plurality of connecting plates (81) distributed in a linear array, and one side of the connecting plate (81) is fixedly connected to a plurality of No. 1 protrusions (82), and a plurality of No. 2 springs (83) are fixedly connected between each of the connecting plates (81) and the side template (3), and one side of the side template (3) is fixedly connected to a plurality of No. 2 protrusions (9) corresponding to the positions of the No. 1 protrusions (82).

2. A combined sand core making mold according to claim 1, Features: One side of the air inlet (26) is connected to an air storage chamber (25), and one side of the bottom template (2) is plugged and fixed with a pressure relief valve (6), and one end of the pressure relief valve (6) is located in the air inlet (26).

3. A combined sand core making mold according to claim 2, Features: An air guide tube (51) is inserted and fixed on one side of the air inlet (26), and the air guide tube (51) is fixedly connected to the air pump (5).

4. A combined sand core making mold according to claim 3, Features: A reinforcing block (21) is fixedly connected to one side of the bottom template (2), and a thread groove (28) for threaded insertion of an adjusting bolt (4) is provided at one end of the reinforcing block (21), and the thread groove (28) is communicated with an air inlet (26).

5. A combined sand core making mold according to claim 4, Features: A telescopic rod (22) is fixedly connected to one side of the reinforcing block (21); one end of the telescopic rod (22) is fixedly connected to a baffle (23) arranged in an "L" shape and used for limiting the sliding of the adjusting bolt (4); a first spring (24) is fixedly connected between the baffle (23) and the reinforcing block (21); one end of the adjusting bolt (4) is fixedly connected to a limiting plate (42); the limiting plate (42) is located in the inner cavity of the sealing slide plate (41) and is rotatably connected to the sealing slide plate (41).

6. A combined sand core making mold according to claim 5, Features: The side of the bottom template (2) is provided with a plurality of No. 1 slide grooves (27) arranged in a "T" shape, and the side of each of the side templates (3) is fixedly connected with a plurality of sliders (34), and the sliders (34) and the No. 1 slide grooves (27) are correspondingly plugged.

7. A combined sand core making mold according to claim 6, Features: A second slide groove (31) for slidingly installing the installation rod (8) is provided on one side of the side template (3), and the second slide groove (31) is located at the center axis of the side template (3) and is symmetrically arranged with the symmetry axis of the side template (3) as the center line.

8. A combined sand core making mold according to claim 7, Features: A plurality of grooves (32) are provided on one side of the side template (3), and a plurality of the No. 2 protrusions (9) are correspondingly located on one side of each groove (32). The connecting plate (81) and the side template (3) are slidably connected to the grooves (32), and the No. 1 protrusions (82) and the No. 2 springs (83) are both located in the grooves (32).

9. A combined sand core making mold according to claim 8, Features: One end of the side template (3) is provided with two symmetrically arranged positioning grooves (33), and the side of the positioning block (7) is fixedly connected with two positioning slide blocks (71) arranged in a "T" shape, and the positioning slide blocks (71) and the positioning grooves (33) are slidably plugged.

10. A core making method, Features: The invention comprises the combined sand core making mold as described in any one of claims 1 to 9.

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