Anti-gravity horizontal string casting device for aluminum alloy shell castings

Abstract

The utility model provides an anti-gravity horizontal string casting device for aluminum alloy shell castings, which belongs to the technical field of aluminum alloy casting and comprises a sand box component, a sand mould component and a pouring component, the sand mould component is arranged in the sand box component and comprises a middle sand mould, a plurality of cavities are arranged on the middle sand mould, and the cavities are communicated with the sand box component. The plurality of cavities are uniformly distributed on the medium sand mold and are used for manufacturing the aluminum alloy shell type casting; and the pouring assembly penetrates through the sand mold assembly and is used for pouring the mold cavity to form the aluminum alloy shell type casting. The aluminum alloy casting mold has the advantages that a plurality of aluminum alloy castings can be formed in one furnace, the quality and performance differences between the castings are small, and the reject ratio of the castings is greatly reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of aluminum alloy casting, and in particular relates to an anti-gravity horizontal series casting device for aluminum alloy shell castings. Background Art

[0002] At present, more and more aluminum alloy shell castings are using counter-gravity casting in the casting process. Counter-gravity casting is a casting method between pressure casting and gravity casting. The advantage of using counter-gravity casting for aluminum alloy shell castings is that the castings crystallize and solidify under pressure, the aluminum alloy shell has strong shrinkage compensation ability, fine grains, high mechanical properties after casting, and fewer internal structural defects. In the field of aluminum alloy counter-gravity casting, most of the current counter-gravity castings can only cast one aluminum alloy shell at a time, which makes the casting process low in yield, which not only causes great material loss and reduces production efficiency, but also increases material cost and time cost.

[0003] In the prior art, in order to solve the high cost and low efficiency problems in the anti-gravity casting process, it can only be achieved by increasing the number of casting shells per furnace. The main method is to use the string casting method, that is, to string the molds together like a string of candied haws in the vertical direction and connect them in series in the height direction. Although this series connection in the height direction can make the positioning between multiple molds more convenient, the solidification sequence and cooling conditions of each casting from bottom to top during the pouring process are different, which makes the fluid properties of the upper aluminum liquid and the lower aluminum liquid different, so that the internal organization and performance of the castings in the same furnace are different after molding. Therefore, the quality and performance of aluminum alloy castings produced in the same batch will be different, and even defective products may appear. Utility Model Content

[0004] Details of one or more embodiments of the present invention are set forth in the following drawings and description to make other features, objects, and advantages of the present application more readily apparent.

[0005] The utility model proposes an anti-gravity horizontal serial casting device for aluminum alloy shell castings, which solves the technical problem of different quality and large performance differences of castings caused by inconsistent casting molding conditions when casting and molding multiple shells in one furnace in the existing anti-gravity vertical serial casting process. It has the characteristics of not only realizing the molding of multiple aluminum alloy castings in one furnace, but also making the quality and performance differences between each casting smaller and greatly reducing the unqualified rate of castings.

[0006] The utility model discloses an anti-gravity horizontal serial casting device for aluminum alloy shell castings, comprising a sand box assembly, a sand mold assembly and a pouring assembly, wherein the sand mold assembly is arranged in the sand box assembly, the sand mold assembly comprises a medium sand mold, the medium sand mold is provided with a plurality of cavities, and the plurality of cavities are evenly distributed on the medium sand mold for making the aluminum alloy shell castings; the pouring assembly runs through the sand mold assembly for pouring the cavities to form the aluminum alloy shell castings.

[0007] In some embodiments, the sand mold assembly further includes a bottom sand mold, a lower sand mold and an upper sand mold, the bottom sand mold is arranged at the bottom of the sand box assembly; the lower sand mold is arranged between the middle sand mold and the bottom sand mold, the lower surface of the lower sand mold coincides with the upper surface of the bottom sand mold, and the upper surface of the lower sand mold coincides with the lower surface of the middle sand mold; the upper sand mold is arranged on the upper surface of the middle sand mold, and the lower surface of the upper sand mold coincides with the upper surface of the middle sand mold.

[0008] In some of the embodiments, the casting assembly includes a cross runner and a straight runner, the cross runner is circumferentially distributed on the upper surface of the bottom sand mold; the straight runner is arranged at the central bottom of the cross runner, the straight runner is connected to the cross runner, the straight runner passes through the bottom sand mold, and the straight runner is a vertical runner.

[0009] In some of the embodiments, the casting assembly further includes a plurality of ingates, wherein the plurality of ingates penetrate through the lower sand mold, and the plurality of ingates are connected to the cross runner.

[0010] In some of the embodiments, the casting assembly further includes a plurality of slot runners, wherein the slot runners are disposed in the medium sand mold, the slot runners are connected to the mold cavity, and the plurality of slot runners are evenly distributed along the circumference of the mold cavity.

[0011] In some embodiments, three slot runners are provided in the circumference of the cavity, and the three slot runners are interconnected with the inner runner.

[0012] In some embodiments, the casting assembly further includes a plurality of risers, wherein the risers are disposed on the lower surface of the upper sand mold, the number of the risers is the same as the number of the ingates, and the risers are interconnected with the slit ingates and the ingates.

[0013] In some embodiments, it also includes an exhaust hole and a filter screen, wherein the exhaust hole is arranged in the upper sand mold, and the exhaust hole is arranged at the top of the riser; the filter screen is arranged between the cross runner and the inner runner to filter the poured aluminum liquid.

[0014] In some embodiments, a plurality of core seats are provided on the upper surface of the lower sand mold, the number of the core seats is the same as the number of the mold cavities, a sand core is provided in the mold cavity, a core head is provided at one end of the sand core, the core head is provided in the core seat, a through hole is provided in the middle of the sand core, and a core frame is inserted into the through hole.

[0015] In some embodiments, the sand box assembly includes a bottom sand box, a lower sand box, a middle sand box and an upper sand box, the bottom sand box is used to make the bottom sand mold; the lower sand box is located on the upper surface of the bottom sand box, used to make the lower sand mold; the middle sand box is located on the upper surface of the lower sand box, used to make the middle sand mold; the upper sand box is located on the upper surface of the middle sand box, used to make the upper sand mold.

[0016] Compared with the prior art, the beneficial effects of the utility model are:

[0017] 1. The utility model provides an anti-gravity horizontal serial casting device for aluminum alloy shell castings, which solves the technical problem that when multiple aluminum alloy shell castings are cast in one furnace in the existing anti-gravity vertical serial casting process, the castings have different quality and large performance differences due to inconsistent casting molding conditions. It has the characteristics of not only realizing the molding of multiple aluminum alloy shell castings in one furnace, but also making the quality and performance differences between each aluminum alloy shell casting smaller and greatly reducing the unqualified rate of aluminum alloy shell castings.

[0018] 2. The utility model manufactures a medium sand mold that can horizontally serially cast multiple aluminum alloy shell castings, and the medium sand mold is provided with multiple cavities. By designing a pouring assembly, the pouring assembly runs through the entire sand mold assembly, that is, the various runners in the pouring assembly are interconnected. When pouring molten aluminum, the molten aluminum can flow in each cavity, so that the anti-gravity horizontal serial casting device for aluminum alloy shell castings can horizontally serially cast more than two aluminum alloy shell castings in one furnace, and the quality and performance differences between each casting can be reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0020] Figure 1 A cross-sectional view of an anti-gravity horizontal series casting device for aluminum alloy shell castings provided by an embodiment of the utility model;

[0021] Figure 2 A schematic diagram of the structure of the medium sand mold provided by an embodiment of the utility model;

[0022] Figure 3 A schematic diagram of the structure of the bottom sand type provided by an embodiment of the utility model;

[0023] Figure 4 A schematic diagram of the structure of the lower sand mold provided by an embodiment of the utility model;

[0024] Figure 5 A schematic diagram of the structure of the upper sand mold provided by an embodiment of the utility model;

[0025] Figure 6 A schematic diagram of the structure of a sand core and a core head provided in an embodiment of the utility model;

[0026] In the above figures: 101-bottom sand box; 102-lower sand box; 103-middle sand box; 104-upper sand box; 201-bottom sand mold; 202-lower sand mold; 203-middle sand mold; 2031-mold cavity; 204-upper sand mold; 301-sprue; 302-cross runner; 303-inner runner; 304-slit runner; 305-riser; 4-filter; 5-vent; 6-core seat; 7-sand core; 8-core frame; 9-core head; 10-through hole. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model is described and illustrated in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the utility model and are not used to limit the utility model. Based on the embodiments provided by the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0028] The utility model provides an anti-gravity horizontal series casting device for aluminum alloy shell castings. Figure 1 It is a cross-sectional view of an anti-gravity horizontal series casting device for aluminum alloy shell castings according to an embodiment of the utility model. Figure 2 According to the embodiment of the present utility model. Figure 1-2As shown, the device comprises at least a sand box assembly, a sand mold assembly and a pouring assembly. The sand mold assembly is arranged in the sand box assembly. The sand mold assembly comprises a medium sand mold 203. The medium sand mold 203 is provided with a plurality of mold cavities 2031. The plurality of mold cavities 2031 are evenly distributed on the medium sand mold 203, and are used to make aluminum alloy shell castings. The pouring assembly runs through the sand mold assembly, and is used to pour the mold cavities 2031 to form aluminum alloy shell castings. The utility model provides an anti-gravity horizontal series casting device for aluminum alloy shell castings, which solves the technical problem that when casting and forming multiple pieces of aluminum alloy shell castings in one furnace in the existing anti-gravity vertical series casting process, the castings have different qualities and large differences in performance due to inconsistent casting molding conditions. The utility model has the characteristics of not only realizing the molding of multiple aluminum alloy shell castings in one furnace, but also making the quality and performance differences between each aluminum alloy shell casting small, and greatly reducing the unqualified rate of aluminum alloy shell castings.

[0029] In some embodiments, multiple cavities 2031 can be set in the medium sand mold 203 as needed. By designing the casting assembly, the casting assembly runs through the entire sand mold assembly, that is, the various runners in the casting assembly are interconnected. When pouring molten aluminum, the molten aluminum can flow in each cavity, so that the anti-gravity horizontal serial casting device for aluminum alloy shell castings can horizontally serial cast more than two aluminum alloy shell castings in one furnace, and the quality and performance differences between each casting can be smaller, thereby greatly improving the production efficiency of castings.

[0030] Further, the sand mold assembly also includes a bottom sand mold 201, a lower sand mold 202 and an upper sand mold 204. The bottom sand mold 201 is arranged at the bottom of the sand box assembly; the lower sand mold 202 is arranged between the middle sand mold 203 and the bottom sand mold 201, the lower surface of the lower sand mold 202 overlaps with the upper surface of the bottom sand mold 201, and the upper surface of the lower sand mold 202 overlaps with the lower surface of the middle sand mold 203; the upper sand mold 204 is arranged on the upper surface of the middle sand mold 203, and the lower surface of the upper sand mold 204 overlaps with the upper surface of the middle sand mold 203. The utility model makes the formed casting mold more solid by overlapping and connecting each sand mold.

[0031] Furthermore, the casting assembly includes a cross runner 302 and a straight runner 301. The cross runner 302 is circumferentially distributed on the upper surface of the bottom sand mold 201; the straight runner 301 is arranged at the central bottom of the cross runner 302, the straight runner 301 is connected to the cross runner 302, the straight runner 301 passes through the bottom sand mold 201, and the straight runner 301 is a vertical runner.

[0032] In some embodiments, the straight runner 301 is connected to the riser pipe of the anti-gravity casting equipment, so that the aluminum liquid can quickly fill the cavity 2031 under the action of anti-gravity. At the same time, the adjustment function of the straight runner 301 can also control the speed and direction of the aluminum liquid flowing into the cavity 2031, thereby effectively controlling the cooling effect of various parts of the obtained aluminum alloy shell casting. By setting the cross runner 302, impurities such as aluminum slag in the poured aluminum liquid can be effectively blocked.

[0033] Furthermore, the pouring assembly further includes a plurality of ingates 303, which penetrate the lower sand mold and are connected to the runner 302. The ingates 303 are connected to the runner 302 to play a role in drainage, so that the aluminum liquid can smoothly flow into the gap runner 304 connected to the mold cavity 2031 through the runner 302 and the ingates 303.

[0034] Furthermore, the casting assembly further includes a plurality of slot runners 304 , which are disposed in the medium sand mold 203 , the slot runners 304 are connected to the mold cavity 2031 , and the plurality of slot runners 304 are evenly distributed along the circumference of the mold cavity 2031 .

[0035] In some embodiments, the slit runner 304 can effectively control the speed and direction of the aluminum liquid filling the cavity 2031, adjust the temperature of each part of the mold and the solidification sequence of the casting, and have a certain shrinkage compensation effect on the casting.

[0036] Furthermore, three slot runners 304 are provided in the circumference of the mold cavity 2031, and the three slot runners 304 are interconnected with the inner runner 303. For better shaping, three slot runners 304 are provided in the circumference of the mold cavity 2031.

[0037] Furthermore, the pouring assembly further includes a plurality of risers 305, which are arranged on the lower surface of the upper sand mold, and the number of the risers 305 is the same as the number of the ingates 303, and the risers 305 are interconnected with the slot ingates 304 and the ingates 303. By providing the risers 305, gas and impurities in the casting can be effectively removed, thereby improving the quality of the casting.

[0038] Furthermore, the device also includes an exhaust hole 5 and a filter screen 4. The exhaust hole 5 is arranged in the upper sand mold 204, and the exhaust hole 5 is arranged at the top of the riser 305; the filter screen 4 is arranged between the cross runner 302 and the inner runner 303 to filter the poured aluminum liquid.

[0039] In some embodiments, by providing the exhaust hole 5, the heat and gas generated during the casting process can be effectively discharged, and the filter screen 4 is provided between the runner 302 and the inner runner 303 to further filter impurities such as aluminum slag in the aluminum liquid.

[0040] Further, a plurality of core seats 6 are provided on the upper surface of the lower sand mold 202, and the number of the core seats 6 is the same as the number of the mold cavities 2031. A sand core 7 is provided in the mold cavity 2031, and a core head 9 is provided at one end of the sand core 7, and the core head 9 is provided in the core seat 6. A through hole 10 is provided in the middle of the sand core 7, and a core frame is inserted into the through hole 10. The core head 9 is provided at one end of the sand core 7, which has the functions of positioning and fixing the sand core and exhausting the gas generated by the sand core after pouring. The core frame is inserted into the through hole 10, which can further enhance the rigidity and strength of the sand core 7 and facilitate the exhaust of the sand core 7.

[0041] Furthermore, the sand box assembly includes a bottom sand box 101, a lower sand box, a middle sand box and an upper sand box. The bottom sand box 101 is used to make a bottom sand mold 201; the lower sand box 102 is located on the upper surface of the bottom sand box 101, and is used to make the lower sand mold 202; the middle sand box 103 is located on the upper surface of the lower sand box 102, and is used to make the middle sand mold 203; the upper sand box 104 is located on the upper surface of the middle sand box 103, and is used to make the upper sand mold 204.

[0042] The manufacturing method and working method of the above-mentioned anti-gravity horizontal series casting device for aluminum alloy shell castings are as follows:

[0043] Step 1: Design and determine the structure of the runner 302 according to the arrangement position of the ingates 303 and the number of aluminum alloy shell castings cast in one batch, and ensure that the positions of the slot runner 304 and the ingates 303 are connected to each other.

[0044] Step 2: Lift the bottom sand box 101 onto the molding platform to make the bottom sand mold 201, determine the placement of the sprue 301 model according to the structural markings of the cross runner 302, place positioning pins to fix the sprue 301 model, then fill with sand and tamp it; scrape off the floating sand on the surface, take out the cross runner 302 model, turn over the bottom sand box 101, take out the sprue 301 model; trim the sprue 301 model and apply paint.

[0045] Step 3: Lift the lower sand box 102 onto the molding platform to make the lower sand mold 202, determine the placement positions of the sprue 30 and the core head 9 positioning device model on the molding platform according to the structural marking position of the cross runner 202, place positioning pins to fix the model of the inner runner 303 and the model of the core head 9 positioning device, then fill with sand and tamp it; scrape off the floating sand on the surface and turn over the lower sand box 102.

[0046] Step 4: Prepare the sand core 7, place the chill in the core box according to the process requirements, put in the core frame 8 and fill in the core sand, tamp it layer by layer until the mouth, and then scrape off the floating sand on the surface.

[0047] Step 5: Loosen the core box fastening nut, open the left and right half core box bodies, repair the sand core 7, spray paint, and bake the sand mold.

[0048] Step 6: Repeat the above steps 3 and 4, that is, repeatedly make the sand cores 7 of the required quantity for one batch.

[0049] Step 7: lift the middle sand box 103 and place it on the upper surface of the lower sand box 102 to make the appearance of the aluminum alloy shell casting. Use a positioning device to fix the model of the aluminum alloy shell casting and the model of the gap runner 304, then fill sand and tamp it; until the mouth, and then scrape off the floating sand on the surface.

[0050] Step 8: Lift the upper sand box 104 and place it on the upper surface of the middle sand box 103. According to the position of the gap runner 304, fix the riser 305 with a blind riser positioning pin, and tamp it layer by layer until the mouth, and then scrape off the floating sand on the surface.

[0051] Step 9: Lift the upper sand box 104 and turn it over; take out the riser 305 model; use an air eye needle to pierce the exhaust hole 5 at the top of the riser 305 and the upper sand mold 204, and apply paint.

[0052] Step 10: Lift the middle sand box 103, remove the positioning pin on the core head 9 positioning device, turn over the middle sand box 103, take out the model of the aluminum alloy shell casting and the model of the gap runner 304, repair the cavity 2031 and the gap runner 304, and apply paint.

[0053] Step 11: Lift the lower flask 102, turn over the lower flask 102, and take out the model of the sprue 301 and the model of the core head 9 positioning device.

[0054] Step 12: Place the lower sand mold 202 on the molding base plate, place the sand core 7 on the upper surface of the lower sand mold 202 according to the installation positioning relationship of the core head 9, correct the installation surface to ensure the stability of the sand core 7, lift the sand core 7 in turn, apply glue on the bottom of the core head 9, and place it in the corresponding core seat 6 of the lower sand mold 202 to ensure that the sand core 7 is stable and level.

[0055] Step 13: Position and close the middle sand mold 203 and the lower sand mold 202 with the closing guide rod; since multiple casting molds are in one middle mold, the closing process must be strictly operated according to the positioning relationship to ensure that the distance between the outer mold and the sand core 7 is uniform.

[0056] Step 14: Use the closing guide rod to position and close the middle sand mold 203, the lower sand mold 202 and the bottom sand mold 201.

[0057] Step 15: Position and close the upper sand mold 204 and the middle sand mold 203 using the closing guide rod.

[0058] Step 16: Connect all the assembled sand molds together with tightening box screws.

[0059] Step 17: Pour aluminum liquid from the sprue by counter-gravity casting. After pouring, box, clean, mark, and heat treat to obtain the required multiple aluminum alloy shell castings.

[0060] Step 18: Inspect the internal structure and performance of each aluminum alloy shell casting.

[0061] It should be noted that the utility model can also be used for castings formed by other molten metals, and the shape of the cavity can also be changed according to the shape of the casting, such as square, triangle, diamond and other shapes.

[0062] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0063] The above-mentioned embodiments only express several implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. An anti-gravity horizontal casting device for aluminum alloy shell castings, characterized in that: include: Sand box components; A sand mold assembly, wherein the sand mold assembly is arranged in the sand box assembly, and the sand mold assembly includes a medium sand mold, and the medium sand mold is provided with a plurality of cavities, and the plurality of cavities are evenly distributed on the medium sand mold, for manufacturing the aluminum alloy shell casting; A casting component is provided, wherein the casting component penetrates the sand mold component and is used for casting the mold cavity to form the aluminum alloy shell casting.

2. The anti-gravity horizontal continuous casting device for aluminum alloy shell castings according to claim 1 is characterized in that: The sand mold assembly also includes: A bottom sand mold, the bottom sand mold is arranged at the bottom of the sand box assembly; A lower sand mold, wherein the lower sand mold is arranged between the middle sand mold and the bottom sand mold, the lower surface of the lower sand mold overlaps with the upper surface of the bottom sand mold, and the upper surface of the lower sand mold overlaps with the lower surface of the middle sand mold; An upper sand mold is arranged on the upper surface of the middle sand mold, and a lower surface of the upper sand mold overlaps with an upper surface of the middle sand mold.

3. The anti-gravity horizontal continuous casting device for aluminum alloy shell castings according to claim 2 is characterized in that: The pouring assembly comprises: A horizontal runner, the horizontal runner is circumferentially distributed on the upper surface of the bottom sand mold; A sprue is provided at the center bottom of the runner, the sprue is connected to the runner, the sprue runs through the bottom sand mold, and the sprue is a vertical runner.

4. The anti-gravity horizontal continuous casting device for aluminum alloy shell castings according to claim 3 is characterized in that: The pouring assembly further comprises a plurality of ingates, wherein the plurality of ingates penetrate through the lower sand mold and are connected with the cross runner.

5. The anti-gravity horizontal continuous casting device for aluminum alloy shell castings according to claim 4 is characterized in that: The casting assembly further comprises a plurality of slot runners, wherein the slot runners are arranged in the medium sand mold, the slot runners are connected to the mold cavity, and the plurality of slot runners are evenly distributed along the circumference of the mold cavity.

6. The anti-gravity horizontal continuous casting device for aluminum alloy shell castings according to claim 5, characterized in that: Three slot runners are arranged in the circumference of the cavity, and the three slot runners are connected with the inner runner.

7. The anti-gravity horizontal continuous casting device for aluminum alloy shell castings according to claim 5, characterized in that: The pouring assembly further comprises a plurality of risers, which are arranged on the lower surface of the upper sand mold, the number of the risers is the same as the number of the ingates, and the risers are interconnected with the slit ingates and the ingates.

8. The anti-gravity horizontal continuous casting device for aluminum alloy shell castings according to claim 7, characterized in that: Also includes: An exhaust hole, the exhaust hole is arranged in the upper sand mold, and the exhaust hole is arranged at the top of the riser; A filter screen is disposed between the runner and the ingrate to filter the poured aluminum liquid.

9. The anti-gravity horizontal continuous casting device for aluminum alloy shell castings according to claim 4, characterized in that: A plurality of core seats are provided on the upper surface of the lower sand mold, the number of the core seats is the same as the number of the mold cavities, a sand core is provided in the mold cavity, a core head is provided at one end of the sand core, the core head is provided in the core seat, a through hole is provided in the middle of the sand core, and a core frame is inserted into the through hole.

10. The anti-gravity horizontal continuous casting device for aluminum alloy shell castings according to claim 2, characterized in that: The sand box assembly comprises: A bottom sand box, the bottom sand box is used to make the bottom sand mold; A lower sand box, the lower sand box is located on the upper surface of the bottom sand box and is used to make the lower sand mold; A middle sand box, which is located on the upper surface of the lower sand box and is used to make the middle sand mold; An upper sand box is located on the upper surface of the middle sand box and is used to make the upper sand mold.

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