Auxiliary tool for dip-coating sand core
By using elastic parts and drive devices to seal the exhaust passage of the sand core in the sand core dip coating auxiliary tooling, the problem of coating entering the exhaust passage during the sand core dip coating process is solved, the risk of casting pores is reduced, and working efficiency and environmental quality are improved.
Patent Information
- Application Number
- CN202420658852.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-01
- Publication Date
- 2025-03-18
- Estimated Expiration
- 2034-04-01
AI Technical Summary
During the dip coating process of sand core, the exhaust passage of the sand core is blocked by the paint, which increases the risk of pores of the castings. At the same time, the operation is complex and dust will be generated, affecting the working environment and efficiency.
A sand core dip coating auxiliary tooling is adopted, including a sealing device and a driving device. The sealing device uses elastic parts to seal the exhaust passage of the sand core, and switches between slack and tightening states through the drive device to ensure that the paint does not enter the exhaust passage.
It effectively reduces the risk of pores of castings, reduces sand sticking, simplifies the operation process, avoids the generation of dust, and improves work efficiency and environmental quality.
Smart Images
Figure CN222626125U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of casting, in particular to a sand core dipping auxiliary tooling. Background Art
[0002] Porosity is a common defect in castings. Venting channels are usually added to the sand core to reduce the porosity of the casting.
[0003] In order to reduce sand sticking to castings, sand cores are usually dipped in paint to improve the quality of castings after core making is completed. However, during the sand core dipping process, the main core exhaust channel will also be dipped in paint, affecting the sand core exhaust and increasing the risk of air holes in the casting. If the paint layer in the exhaust channel is destroyed after the sand core is dipped and dried, the operation will be complicated, the efficiency will be low, and a lot of dust will be generated, affecting the working environment.
[0004] Therefore, how to reduce the risk of porosity in castings while reducing sand sticking to castings, while ensuring work efficiency and working environment quality, has become a technical problem that needs to be solved urgently in this field. Utility Model Content
[0005] The purpose of the utility model is to at least solve how to reduce the risk of casting porosity while reducing sand sticking to the casting, while ensuring work efficiency and working environment quality. This purpose is achieved through the following technical solutions:
[0006] In the first aspect, the utility model proposes a sand core dipping auxiliary tooling, including: a sealing device, the sealing device includes an elastic member, the elastic member is used to be arranged inside the exhaust channel of the sand core; the elastic member has a relaxed state and a tensioned state, when the elastic member is in the relaxed state, there is a gap between the elastic member and the inner wall of the exhaust channel; when the elastic member is in the tensioned state, the elastic member fits with the inner wall of the exhaust channel of the sand core to achieve sealing of the exhaust channel of the sand core; and a driving device, used to drive the elastic member to switch between the relaxed state and the tensioned state.
[0007] This sand core dipping auxiliary tooling, before dipping the sand core, first uses a blocking device to block the exhaust channel of the sand core, and ensures that the elastic member extends into the interior of the exhaust channel of the sand core; then, the elastic member is switched to a tightened state through a driving device, so that there is no gap between the elastic member and the inner wall of the exhaust channel of the sand core, and the exhaust channel of the sand core is blocked to prevent the paint from entering the interior of the exhaust channel of the sand core during dipping; finally, the blocking device is connected to the sand core to dip the paint together to complete the dipping of the sand core. After the dipping is completed, the blocking of the exhaust channel of the sand core by the blocking device is released, and the elastic member is switched to a relaxed state through a driving device, so that there is a gap between the elastic member and the inner wall of the exhaust channel of the sand core, and the elastic member is removed from the interior of the exhaust channel; then the sand core can be dried, and since the paint does not enter the interior of the exhaust channel of the sand core, it will not affect the exhaust function of the sand core. Therefore, this setting method can reduce the risk of air holes in the casting while reducing sand sticking to the casting; and because this method does not require the destruction of the coating layer of the exhaust channel of the sand core through a more complicated process and does not generate dust, it ensures work efficiency and working environment quality.
[0008] In some embodiments of the present invention, the sealing device is a cylinder device, which includes: a cylinder body with a cavity inside; a piston located in the cavity; a pressure rod, the bottom end of the pressure rod is fixedly connected to the top end of the piston, the pressure rod protrudes out of the cavity, and the top end of the pressure rod has a protrusion protruding from the side wall of the pressure rod; a guide sleeve, including a sealing plate and a vertical tube sleeved on the outer wall of the pressure rod, the vertical tube extends along a first direction, the guide hole of the vertical tube passes through the sealing plate and is connected to the cavity, the pressure rod and the guide hole both extend along the first direction, the bottom of the sealing plate is connected to the top of the cylinder body, and the top of the sealing plate is used to seal the port of the exhaust channel of the sand core; and a sealing ring, which constitutes an elastic member; the sealing ring is sleeved on the side wall of the pressure rod, the upper end of the sealing ring abuts against the lower end of the protrusion, and the lower end of the sealing ring abuts against the upper end of the vertical tube, and the driving device can drive the piston to drive the pressure rod to reciprocate along the first direction, so that the sealing ring can switch between a relaxed state and a tensioned state.
[0009] In some embodiments of the utility model, the cavity includes an upper cavity portion and a lower cavity portion which are interconnected, the upper cavity portion has a first air inlet on the side wall, and the lower cavity portion has a second air inlet on the side wall; the driving device is used to supply air to the first air inlet or the second air inlet, when air is taken in by the first air inlet, the piston drives the protrusion to move along the first direction close to the side of the cylinder body; when air is taken in by the second air inlet, the piston drives the protrusion to move along the first direction toward the side away from the cylinder body.
[0010] In some embodiments of the utility model, the driving device includes: a first air inlet pipe, connected to the first air inlet port; a second air inlet pipe, connected to the second air inlet port; and an air supply mechanism, connected to both the first air inlet pipe and the second air inlet pipe, for supplying air to the first air inlet pipe and the second air inlet pipe.
[0011] In some embodiments of the utility model, the sand core dipping auxiliary tooling also includes a base plate, a plurality of cylinder devices, and the plurality of cylinder devices are arranged at intervals on the base plate. The number of the cylinder devices is the same as the number of the exhaust channels of the sand core and are arranged one-to-one.
[0012] In some embodiments of the utility model, a slider is provided at the bottom of each cylinder body, a plurality of slide grooves that match the plurality of sliders one by one are provided on the bottom plate, and a plurality of grooves that are arranged at intervals and match the sliders are provided in each slide groove; in a group of corresponding sliders, slide grooves and a plurality of grooves: the slider can slide along the slide groove and can be inserted into any groove.
[0013] In some embodiments of the utility model, a slider is provided at the bottom of each cylinder body, a plurality of slide grooves that match the plurality of slides one by one are provided on the bottom plate, and a plurality of grooves that are arranged at intervals and match the sliders are provided in each slide groove; in a group of corresponding sliders, slide grooves and multiple grooves: the slider can slide along the slide groove and can be inserted into any groove.
[0014] In some embodiments of the utility model, the cylinder device also includes a limiting mechanism, which includes: a fixed block connected to the side wall of the cylinder body, the fixed block having a through hole extending along a first direction; and a limiting rod passing through the through hole; the limiting rod can move along the first direction, the limiting rod has a first state and a second state, when the limiting rod is in the first state, the lower end of the limiting rod is located in the limiting hole; when the limiting rod is in the second state, the lower end of the limiting rod is located outside the limiting hole.
[0015] In some embodiments of the utility model, a locking hole is provided on the side wall of the fixed block, and the limiting mechanism also includes: a spring, which can be stretched and compressed along a first direction, and the lower end of the spring is fixedly connected to the upper end of the limiting rod; a clamping piece, the lower end of the clamping piece is fixedly connected to the upper end of the spring; and a locking screw, which is passed through the locking hole; the limiting mechanism has a locking state and an unlocking state, when the limiting mechanism is in the locking state, the locking screw is in contact with the side wall of the clamping piece and the side wall of the limiting rod; when the limiting mechanism is in the unlocking state, the locking screw is separated from the side wall of the clamping piece.
[0016] In some embodiments of the present invention, a sealing gasket is provided on the top of the blocking plate, and the sealing gasket is used to block the port of the exhaust channel.
[0017] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] By reading the detailed description of the preferred embodiment below, various other advantages and benefits will become clear to those of ordinary skill in the art. The accompanying drawings are only used for the purpose of illustrating the preferred embodiment and are not to be considered as limiting the present invention. Moreover, the same reference numerals are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:
[0019] Figure 1 A front view of a sand core dipping auxiliary tooling provided in an embodiment of the utility model;
[0020] Figure 2 A top view of the sand core dipping auxiliary tooling provided in an embodiment of the utility model;
[0021] Figure 3 A partial structural cross-sectional view of a sand core dipping auxiliary tooling provided in an embodiment of the utility model;
[0022] Figure 4 A partial structural schematic diagram of the sand core dipping auxiliary tooling provided in an embodiment of the utility model for plugging the exhaust channel of the sand core.
[0023] The reference numerals are as follows:
[0024] 10. Sand core dipping auxiliary tooling;
[0025] 1. Blocking device; 11. Elastic member; 111. Sealing ring; 12. Cylinder; 121. Cavity; 13. Piston; 14. Pressure rod; 15. Guide sleeve; 151. Blocking plate; 152. Vertical cylinder; 16. Sliding block; 17. Limiting mechanism; 171. Fixed block; 172. Limiting rod; 173. Spring; 174. Pressing member; 175. Locking screw; 18. Sealing pad; 19. Fixed plate;
[0026] 2. driving device; 21. first air inlet pipe; 22. second air inlet pipe; 23. pipeline fixing device; 231. first air supply port; 232. second air supply port;
[0027] 3. Bottom plate; 31. Slideway;
[0028] 4. Sand core; 41. Exhaust channel. DETAILED DESCRIPTION
[0029] The exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided in order to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.
[0030] It should be understood that the terms used herein are only for the purpose of describing specific example embodiments and are not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms "one", "an" and "said" as used herein may also be meant to include plural forms. The terms "include", "comprise", "contain", and "have" are inclusive, and therefore specify the existence of stated features, steps, operations, elements and / or parts, but do not exclude the existence or addition of one or more other features, steps, operations, elements, parts, and / or combinations thereof. The method steps, processes, and operations described herein are not interpreted as necessarily requiring them to be performed in the specific order described or illustrated, unless the execution order is clearly indicated. It should also be understood that additional or alternative steps may be used.
[0031] Although the terms first, second, third, etc. can be used in the text to describe multiple elements, components, regions, layers and / or sections, these elements, components, regions, layers and / or sections should not be limited by these terms. These terms can only be used to distinguish an element, component, region, layer or section from another region, layer or section. Unless the context clearly indicates, terms such as "first", "second" and other numerical terms do not imply order or sequence when used in the text. Therefore, the first element, component, region, layer or section discussed below can be referred to as the second element, component, region, layer or section without departing from the teaching of the example embodiments.
[0032] For ease of description, spatial relative terms may be used herein to describe the relationship of one element or feature relative to another element or feature as shown in the figure, such as "inside", "outside", "inner side", "outer side", "below", "below", "above", "above", etc. Such spatial relative terms are intended to include different orientations of the device in use or operation in addition to the orientation depicted in the figure. For example, if the device in the figure is turned over, then the elements described as "below other elements or features" or "below other elements or features" will subsequently be oriented as "above other elements or features" or "above other elements or features". Therefore, the example term "below..." can include both upper and lower orientations. The device can be oriented otherwise (rotated 90 degrees or in other directions) and the spatial relative descriptors used in the text are interpreted accordingly.
[0033] Figure 1 A front view of a sand core dipping auxiliary tooling provided in an embodiment of the utility model; Figure 2 A top view of the sand core dipping auxiliary tooling provided in an embodiment of the utility model; Figure 3 A partial structural cross-sectional view of a sand core dipping auxiliary tooling provided in an embodiment of the utility model; Figure 4A schematic diagram of a part of the structure of the sand core dip coating auxiliary tooling provided in the embodiment of the utility model when the exhaust channel of the sand core is blocked; Figure 1-Figure 4 The embodiment of the utility model provides a sand core dipping auxiliary tooling 10, comprising: a blocking device 1, the blocking device 1 comprises an elastic member 11, the elastic member 11 is used to be arranged inside the exhaust channel 41 of the sand core 4; the elastic member 11 has a relaxed state and a tensioned state, when the elastic member 11 is in the relaxed state, there is a gap between the elastic member 11 and the inner wall of the exhaust channel 41 of the sand core 4; when the elastic member 11 is in the tensioned state, the elastic member 11 fits with the inner wall of the exhaust channel 41 to achieve blocking of the exhaust channel 41; and a driving device 2, used to drive the elastic member 11 to switch between the relaxed state and the tensioned state.
[0034] In this embodiment, before the sand core 4 is dip-coated, the sealing device 1 is first used to block the exhaust channel 41 of the sand core 4, and the elastic member 11 is ensured to extend into the exhaust channel 41 of the sand core 4; then, the elastic member 11 is switched to a tightened state by the driving device 2, so that there is no gap between the elastic member 11 and the inner wall of the exhaust channel 41 of the sand core 4, thereby sealing the exhaust channel 41 of the sand core 4 to prevent the paint from entering the exhaust channel 41 of the sand core 4 during dip-coating; finally, the sealing device 1 is connected to the sand core 4 to dip the paint together to complete the dip-coating of the sand core 4. After the dipping is completed, the sealing device 1 is released from the exhaust channel 41 of the sand core 4, and the elastic member 11 is switched to a relaxed state through the driving device 2, so that a gap is provided between the elastic member 11 and the inner wall of the exhaust channel 41 of the sand core 4, and the elastic member 11 is removed from the inside of the exhaust channel 41; then the sand core 4 can be dried, and since the coating does not enter the inside of the exhaust channel 41 of the sand core 4, the exhaust function of the sand core 4 will not be affected.
[0035] Therefore, the sand core dipping auxiliary tooling 10 provided in this embodiment can reduce the risk of air holes in the casting while reducing sand sticking to the casting; and because this method does not require a more complicated process to destroy the coating layer of the exhaust channel 41 of the sand core 4 and does not generate dust, it improves work efficiency to a certain extent and ensures the quality of the working environment.
[0036] like Figure 3As shown, according to an optional embodiment of the present application, the blocking device 1 is a cylinder device, which includes: a cylinder body 12, which has a cavity 121 inside; a piston 13, which is located in the cavity 121; a pressure rod 14, the bottom end of the pressure rod 14 is fixedly connected to the top end of the piston 13, the pressure rod 14 protrudes out of the cavity 121, and the top end of the pressure rod 14 has a protrusion protruding from the side wall of the pressure rod 14; a guide sleeve 15, including a blocking plate 151 and a vertical cylinder 152 sleeved on the outer wall of the pressure rod 14, the vertical cylinder 152 extends along the first direction, the guide hole of the vertical cylinder 152 passes through the blocking plate 151 and is connected to the cavity 121, and the pressure rod 1 4 and the guide hole extend along the first direction, the bottom of the blocking plate 151 is connected to the top of the cylinder body 12, and the top of the blocking plate 151 is used to block the port of the exhaust channel 41 of the sand core 4; and the sealing ring 111, the sealing ring 111 is made of elastic material, and constitutes the elastic member 11; the sealing ring 111 is sleeved on the side wall of the pressure rod 14, the upper end of the sealing ring 111 abuts against the lower end of the protrusion, and the lower end of the sealing ring 111 abuts against the upper end of the vertical cylinder 152, and the driving device 2 can drive the piston 13 to drive the pressure rod 14 to reciprocate along the first direction, so that the sealing ring 111 switches between a relaxed state and a tensioned state.
[0037] In this embodiment, specifically, before the sand core 4 is dip-coated, the vertical cylinder 152 of the guide sleeve 15 together with the pressure rod 14 are first extended into the exhaust channel 41 of the sand core 4, and the top of the blocking plate 151 of the guide sleeve 15 blocks the port of the exhaust channel 41 of the sand core 4, forming a first layer of sealing for the exhaust channel 41 of the sand core 4; then the driving device 2 drives the piston 13 to drive the pressure rod 14 to move downward, and since the sealing ring 111 is sleeved on the side wall of the pressure rod 14, and the upper end of the sealing ring 111 is When the lower end of the protrusion abuts and the lower end of the sealing ring 111 abuts against the upper end of the vertical tube 152, the sealing ring 111 will be subjected to vertical pressure and expand in the circumferential direction of the pressure rod 14 until the sealing ring 111 and the inner wall of the exhaust channel 41 of the sand core 4 are tightly fitted to have no gap therebetween and the sealing ring 111 is in a tightened state, thereby forming a second layer of sealing for the exhaust channel 41 of the sand core 4; finally, the sealing device 1 is connected to the sand core 4 and dipped in the coating together to complete the dip coating of the sand core 4. After the dipping is completed, the driving device 2 drives the piston 13 to drive the pressure rod 14 to move upward to release the pressure on the sealing ring 111 in the vertical direction, so that there is a gap between the elastic member 11 and the inner wall of the exhaust channel 41 of the sand core 4. At this time, the sealing ring 111 switches from a tensioned state to a relaxed state; then the guide sleeve 15 is moved out of the exhaust channel 41 of the sand core 4 as a whole, and the first layer of sealing and the second layer of sealing of the exhaust channel 41 of the sand core 4 are contacted at the same time; finally, the sand core 4 can be dried.
[0038] Therefore, the sealing device 1 is set as a cylinder device, which can easily achieve double-layer sealing of the exhaust channel 41 of the sand core 4, effectively preventing the coating from entering the exhaust channel 41 of the sand core 4 during dipping, thereby reducing the risk of air holes in the casting while reducing sand sticking to the casting.
[0039] According to an optional embodiment of the present application, the cavity 121 includes an upper cavity portion and a lower cavity portion which are interconnected, the upper cavity portion has a first air inlet on the side wall, and the lower cavity portion has a second air inlet on the side wall; the driving device 2 is used to supply air to the first air inlet or the second air inlet, when air is taken in by the first air inlet, the piston 13 drives the protrusion to move along the first direction toward the side of the cylinder body 12; when air is taken in by the second air inlet, the piston 13 drives the protrusion to move along the first direction toward the side away from the cylinder body 12.
[0040] Specifically, refer to Figure 1-Figure 3 The driving device 2 includes: a first air intake pipe 21 connected to the first air intake port; a second air intake pipe 22 connected to the second air intake port; and an air supply mechanism connected to both the first air intake pipe 21 and the second air intake pipe 22 for supplying air to the first air intake pipe 21 and the second air intake pipe 22.
[0041] In this embodiment, when the driving device 2 is needed to drive the piston 13 to drive the pressure rod 14 to move downward (i.e., along the first direction to the side close to the cylinder body 12), the air supply mechanism supplies air to the first air inlet through the first air inlet pipe 21 to increase the pressure in the upper chamber, thereby causing the piston 13 to move downward. Since the bottom end of the pressure rod 14 is fixedly connected to the top end of the piston 13, the pressure rod 14 is driven to move downward together. When the driving device 2 is needed to drive the piston 13 to drive the pressure rod 14 to move upward (i.e., along the first direction to the side away from the cylinder body 12), the air supply mechanism supplies air to the second air inlet through the second air inlet pipe 22 to increase the pressure in the lower chamber, thereby causing the piston 13 to move upward. Since the bottom end of the pressure rod 14 is fixedly connected to the top end of the piston 13, the pressure rod 14 is driven to move downward together.
[0042] Among them, the air supply mechanism can be an air pressure generator.
[0043] In addition, both the first air inlet and the second air inlet may be provided with sealing gaskets for sealing the connection between the first air inlet pipe 21 and the first air inlet and the connection between the second air inlet pipe 22 and the second air inlet, thereby preventing leakage of the gas delivered into the cavity 121.
[0044] In addition, the air supply mechanism may include a first solenoid valve and a second solenoid valve, the first solenoid valve is used to control the on-off of the first air intake pipe 21, and the second solenoid valve is used to control the on-off of the second air intake pipe 22; in actual operation, the movement of the pressure rod 14 in the first direction can be achieved by controlling the on-off of the first solenoid valve and the second solenoid valve, thereby realizing the switching of the sealing ring 111 between the relaxed state and the tensioned state, further improving the working efficiency of the sand core dipping auxiliary tooling 10.
[0045] refer to Figure 1-Figure 4 According to an optional embodiment of the present application, the sand core dipping auxiliary tooling 10 also includes a base plate 3, a plurality of cylinder devices, and the plurality of cylinder devices are arranged at intervals on the base plate 3. The number of the cylinder devices is the same as the number of the exhaust channels 41 of the sand core 4 and is arranged one-to-one.
[0046] Among them, when there are multiple cylinder devices, the driving device 2 may also include a pipeline fixing device 23, the pipeline fixing device 23 is provided with a first air supply port 231 and a second air supply port 232, the first air supply port 231 is connected to multiple first air intake pipes 21, and the second air supply port 232 is connected to multiple second air intake pipes 22; in this way, the efficiency of supplying air to the cavity 121 of the cylinder body 12 can be improved.
[0047] In this embodiment, the manner in which a plurality of cylinder devices are arranged on the bottom plate 3 can facilitate the plugging of the sand core 4 having a plurality of exhaust passages 41 , thereby improving the plugging efficiency.
[0048] like Figure 3 As shown, according to an optional embodiment of the present application, a slider 16 is provided at the bottom of each cylinder body 12, a plurality of slide grooves 31 which cooperate with the plurality of sliders 16 are provided on the bottom plate 3, and a plurality of grooves which are arranged at intervals and cooperate with the slider 16 are provided in each slide groove 31; in a group of corresponding sliders 16, slide grooves 31 and a plurality of grooves: the slider 16 can slide along the slide groove 31 and can be inserted into any groove.
[0049] A fixing plate 19 for fixedly connecting with the slide block 16 may be provided at the bottom of the cylinder body 12 .
[0050] In addition, two adjacent slide grooves 31 may be connected to each other, and the slide groove 31 may extend along the extension direction of the bottom plate 3 , depending on actual needs and not limited.
[0051] In this embodiment, when it is necessary to seal the exhaust channels 41 of different sand cores 4, the position of the cylinder body 12 can be slid along the slide groove 31, so as to adjust the relative positions of the multiple cylinder bodies 12 on the base plate 3 to achieve a one-to-one correspondence between the positions of the multiple cylinders and the positions of the multiple exhaust channels 41 of the sand core 4; and the presence of the groove can make the cylinder body 12 more stably installed in the slide groove 31.
[0052] Therefore, the setting of the slide groove 31 and the slider 16 can be suitable for sand cores 4 with different arrangement intervals of the exhaust channel 41, thereby improving the use scenario of the sand core dipping auxiliary tooling 10; the setting of the groove improves the overall stability of the sand core dipping auxiliary tooling 10.
[0053] refer to Figure 3 According to an optional embodiment of the present application, a plurality of limiting holes are provided in the slide groove 31, and the plurality of limiting holes are arranged in a one-to-one correspondence with the plurality of grooves. The cylinder device further includes a limiting mechanism 17, and the limiting mechanism 17 includes: a fixed block 171, connected to the side wall of the cylinder body 12, and the fixed block 171 has a through hole extending along the first direction; and a limiting rod 172, which is penetrated through the through hole; the limiting rod 172 can move along the first direction, and the limiting rod 172 has a first state and a second state. When the limiting rod 172 is in the first state, the lower end of the limiting rod 172 is located in the limiting hole; when the limiting rod 172 is in the second state, the lower end of the limiting rod 172 is located outside the limiting hole.
[0054] In this embodiment, when the position of the cylinder body 12 relative to the base plate 3 is adjusted, the limit rod 172 is adjusted to the first state, that is, the lower end of the limit rod 172 is located in the limit hole, so as to further limit the relative position of the cylinder body 12 relative to the base plate 3 in the extension direction of the slide groove 31; in this way, when the guide sleeve 15 is extended into the exhaust channel 41 of the sand core 4, the positions of multiple guide sleeves 15 are relatively fixed, which improves the accuracy of blocking the exhaust channel 41 of the sand core 4; when it is necessary to release the connection between the cylinder body 12 and the base plate 3 or readjust the position of the cylinder body 12 relative to the base plate 3, it is only necessary to adjust the limit rod 172 to the second state, that is, to move the lower end of the limit rod 172 out of the limit block and move the slider 16 out of the groove. At this time, the cylinder body 12 can move relative to the base plate 3 in the slide groove 31.
[0055] Continue to refer Figure 3 According to an optional embodiment of the present application, a locking hole is provided on the side wall of the fixing block 171, and the limiting mechanism 17 also includes: a spring 173, which can be stretched and compressed along a first direction, and the lower end of the spring 173 is fixedly connected to the upper end of the limiting rod 172; a clamping piece 174, and the lower end of the clamping piece 174 is fixedly connected to the upper end of the spring 173; and a locking screw 175, which is passed through the locking hole; the limiting mechanism 17 has a locking state and an unlocking state. When the limiting mechanism 17 is in the locking state, the locking screw 175 abuts against the side wall of the clamping piece 174 and the side wall of the limiting rod 172; when the limiting mechanism 17 is in the unlocking state, the locking screw 175 is separated from the side wall of the clamping piece 174.
[0056] In this embodiment, when the position of the cylinder body 12 relative to the bottom plate 3 is adjusted and the limiting rod 172 is adjusted to the first state, the operator can hold the pressing member 174 to compress the spring 173 downward, and then tighten the locking screw 175 to make the locking screw 175 abut against the side wall of the pressing member 174 and the side wall of the limiting rod 172, and adjust the limiting mechanism 17 to the locked state, further improving the overall stability of the sand core dipping auxiliary tooling 10, so as to further improve the accuracy of blocking the exhaust channel 41 of the sand core 4 when the guide sleeve 15 is extended into the exhaust channel 41 of the sand core 4. When it is necessary to adjust the limiting mechanism 17 to the unlocked state, it is only necessary to reversely rotate the locking screw 175. When the locking screw 175 is separated from the side wall of the pressing member 174, the spring 173 will bounce upward, thereby driving the limiting rod 172 to disengage from the limiting hole. At this time, the limiting rod 172 switches to the second state, and the limiting mechanism 17 as a whole is also in the unlocked state.
[0057] like Figure 3 and Figure 4 As shown, according to an optional embodiment of the present application, a sealing gasket 18 is provided on the top of the sealing plate 151 , and the sealing gasket 18 is used to seal the port of the exhaust channel 41 .
[0058] The sealing pad 18 may be a rubber pad, which has low cost, is easy to install, and has a good sealing effect.
[0059] In this embodiment, the provision of the sealing gasket 18 can enhance the sealing effect of the blocking plate 151 on the port of the exhaust channel 41 of the sand core 4 .
[0060] The above is only a preferred specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the utility model should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.
Claims
1. A sand core dipping auxiliary tooling, characterized in that: include: A plugging device, the plugging device comprising an elastic member, the elastic member being used to be arranged inside the exhaust passage of the sand core; The elastic member has a relaxed state and a tightened state. When the elastic member is in the relaxed state, there is a gap between the elastic member and the inner wall of the exhaust channel; when the elastic member is in the tightened state, the elastic member fits with the inner wall of the exhaust channel of the sand core to achieve blocking of the exhaust channel of the sand core. as well as The driving device is used for driving the elastic member to switch between a relaxed state and a tensioned state.
2. The sand core dipping auxiliary tooling according to claim 1 is characterized in that: The blocking device is a cylinder device, and the cylinder device comprises: A cylinder body having a cavity therein; a piston, located in the cavity; A pressure rod, the bottom end of which is fixedly connected to the top end of the piston, the pressure rod protrudes out of the cavity, and the top end of the pressure rod has a protrusion protruding from the side wall of the pressure rod; A guide sleeve, comprising a blocking plate and a vertical cylinder sleeved on the outer wall of the pressure rod, the vertical cylinder extending in a first direction, a guide hole of the vertical cylinder penetrating the blocking plate and communicating with the cavity, the pressure rod and the guide hole both extending in the first direction, the bottom of the blocking plate connected to the top of the cylinder body, the top of the blocking plate used to block the port of the exhaust channel of the sand core; and A sealing ring, which constitutes the elastic member; the sealing ring is sleeved on the side wall of the pressure rod, the upper end of the sealing ring abuts against the lower end of the protrusion, and the lower end of the sealing ring abuts against the upper end of the vertical tube, and the driving device can drive the piston to drive the pressure rod to reciprocate along the first direction, so that the sealing ring can switch between a relaxed state and a tensioned state.
3. The sand core dipping auxiliary tooling according to claim 2 is characterized in that: The cavity includes an upper cavity portion and a lower cavity portion which are interconnected, the upper cavity portion has a first air inlet on the side wall, and the lower cavity portion has a second air inlet on the side wall; the driving device is used to supply air to the first air inlet or the second air inlet, when air is taken in by the first air inlet, the piston drives the protrusion to move along the first direction toward the side of the cylinder body; when air is taken in by the second air inlet, the piston drives the protrusion to move along the first direction toward the side away from the cylinder body.
4. The sand core dipping auxiliary tooling according to claim 3 is characterized in that: The driving device comprises: a first air inlet pipe, connected to the first air inlet; a second air inlet pipe, connected to the second air inlet; and An air supply mechanism is connected to both the first air intake pipe and the second air intake pipe, and is used to supply air to the first air intake pipe and the second air intake pipe.
5. The sand core dipping auxiliary tooling according to claim 4, characterized in that: The sand core dipping auxiliary tooling also includes a bottom plate, and the cylinder devices are multiple, and the multiple cylinder devices are arranged on the bottom plate at intervals. The number of the cylinder devices is the same as the number of the exhaust channels of the sand core and are arranged one by one.
6. The sand core dipping auxiliary tooling according to claim 5, characterized in that: A slider is provided at the bottom of each cylinder body, a plurality of slide grooves are provided on the bottom plate and match the plurality of slide grooves one by one, and a plurality of grooves are provided in each slide groove and are spaced apart and match the slide grooves; In a group of corresponding sliders, slide grooves and multiple grooves: the slider can slide along the slide grooves and can be inserted into any of the grooves.
7. The sand core dipping auxiliary tooling according to claim 6, characterized in that: A plurality of limiting holes are arranged in the slide groove, and the plurality of limiting holes are arranged in one-to-one correspondence with the plurality of grooves.
8. The sand core dipping auxiliary tooling according to claim 7, characterized in that: The cylinder device further includes a limiting mechanism, which includes: a fixing block connected to a side wall of the cylinder body, the fixing block having a through hole extending along the first direction; and A limit rod is passed through the through hole; the limit rod can move along the first direction, and the limit rod has a first state and a second state. When the limit rod is in the first state, the lower end of the limit rod is located in the limit hole; when the limit rod is in the second state, the lower end of the limit rod is located outside the limit hole.
9. The sand core dipping auxiliary tooling according to claim 8, characterized in that: The side wall of the fixing block is provided with a locking hole, and the limiting mechanism further comprises: A spring capable of stretching and compressing along a first direction, wherein the lower end of the spring is fixedly connected to the upper end of the limiting rod; A pressing member, the lower end of which is fixedly connected to the upper end of the spring; and A locking screw is passed through the locking hole; the limiting mechanism has a locking state and an unlocking state. When the limiting mechanism is in the locking state, the locking screw abuts against the side wall of the clamping member and the side wall of the limiting rod; when the limiting mechanism is in the unlocking state, the locking screw is separated from the side wall of the clamping member.
10. The sand core dipping auxiliary tooling according to any one of claims 2 to 9, characterized in that: A sealing gasket is provided on the top of the blocking plate, and the sealing gasket is used to block the port of the exhaust channel.