A casting device for a mine machinery ceramic roller sleeve wear-resistant cast iron piece

Abstract

The utility model relates to casting technical field, concretely relates to a kind of casting device for mine machinery ceramic roller cover wear-resistant nodular cast iron spare: including upper sand box, upper box, middle sand box, middle box, lower box, lower sand box, filter brick, sand core and multiple ceramic inlay strip, the parting surface of middle box and lower box forms upper runner and lower runner, using one sand core, upper box, middle box and lower box all use high-strength sand, both avoid the generation of sand drop due to lower core, so that casting appearance quality is better, and sand core manufacturing cost and molding working hours are saved, when metal liquid passes through direct gate lower section and enters upper runner, then is filtered by filter brick, flows into lower runner, flows into pouring area by ingate, completes the casting of casting, using above-mentioned mode can make metal liquid flow velocity slower filling pattern steady, and the scouring strength in pouring area is smaller, reduces the inflow of slag, guarantees the quality of casting, obtains the effect of improving casting qualification rate.

Description

Technical Field

[0001] This utility model relates to the field of casting technology, and in particular to a casting device for wear-resistant ductile iron parts for ceramic roller sleeves in mining machinery. Background Technology

[0002] Wear-resistant ductile iron ceramic roller sleeves for mining machinery are mostly drum-shaped or conical rotating bodies with large outer diameters. They require high internal density and mechanical properties. The overall parts require tight bonding of the inlay strips on the outside of the casting, and the surface must have high strength, hardness, and wear resistance. Furthermore, due to the harsh operating environment of wear-resistant ductile iron ceramic roller sleeves for mining machinery, the density and wear resistance of the castings are very important. If the density and wear resistance of the castings are insufficient, the shape of the roller sleeve will experience greater wear during grinding with the ore, affecting its service life.

[0003] However, when using traditional casting processes to manufacture wear-resistant ductile iron parts for ceramic roller sleeves in mining machinery, defects such as shrinkage porosity, sand holes, cracks, and inclusions are prone to occur during the casting process. This results in internal shrinkage porosity in the finished product and external cold shut defects caused by the rapid cooling of the inserts, affecting the service life of the casting and resulting in a low casting qualification rate. Summary of the Invention

[0004] The purpose of this utility model is to provide a casting device for wear-resistant ductile iron parts for ceramic roller sleeves in mining machinery. This device solves the problem that when manufacturing wear-resistant ductile iron parts for ceramic roller sleeves in mining machinery using traditional casting processes, defects such as shrinkage porosity, sand holes, cracks, and inclusions are prone to occur during the casting process. As a result, the finished product is prone to internal shrinkage porosity and external cold shut defects caused by the rapid cooling of the inserts, which affects the service life of the casting and results in a low casting qualification rate.

[0005] To achieve the above objectives, this utility model provides a casting device for wear-resistant ductile iron parts of ceramic roller sleeves for mining machinery. The casting device includes an upper sand box, an upper box, a middle sand box, a middle box, a lower box, a lower sand box, filter bricks, a sand core, and multiple ceramic inserts. The lower sand box is located at the bottom of the middle sand box, and the upper sand box is located above the middle sand box. The upper box is located inside the upper sand box, the middle box is located inside the middle sand box, and the lower box is located inside the lower sand box. The sand core is located at the center of the inner bottom of the lower box, and the top of the sand core is flush with the end face of the middle box. The area between the inner wall of the lower box and the inner wall of the middle box and the outer wall of the sand core is a casting area. Multiple ceramic inserts are also evenly arranged inside the lower box, and these ceramic inserts are evenly arranged within the casting area. The upper box has an upper section of a straight pouring channel at the center of its top, the sand core has a lower section of a straight pouring channel at its center, and the bottom of the sand core has an upper horizontal pouring channel. The top of the lower section of the straight pouring channel is connected to the bottom of the upper section of the straight pouring channel, and the bottom of the lower section of the straight pouring channel is connected to the upper horizontal pouring channel. The bottom of the lower box has a lower horizontal pouring channel, which is connected to the upper horizontal pouring channel. The bottom of the lower box also has an inner pouring channel, one end of which is connected to the lower horizontal pouring channel, and the other end of which is connected to the pouring area. The filter brick is placed between the upper and lower horizontal pouring channels.

[0006] The upper box is provided with multiple top risers, and the bottom of each top riser corresponds to the pouring area.

[0007] The outer side wall of the top of the sand core is evenly provided with multiple mounting grooves, and each mounting groove is provided with a chill.

[0008] The lower box has multiple fixing holes evenly arranged on its inner bottom, and each ceramic inlay has a fixing post at its bottom, which is adapted to the fixing hole.

[0009] This utility model discloses a casting device for wear-resistant ductile iron parts for ceramic roller sleeves in mining machinery. It includes an upper sand box, an upper chamber, a middle sand box, a middle chamber, a lower chamber, a filter brick, a sand core, and multiple ceramic inserts. The sand core is separately housed inside the lower chamber. The upper chamber, the middle chamber, and the lower chamber have parting surfaces. The parting surfaces of the middle chamber and the lower chamber form the upper and lower horizontal runners, respectively. A single sand core is used. The upper chamber, the middle chamber, and the lower chamber all use high-strength sand, which avoids sand loss due to the lower core. This process results in a better appearance quality for the casting and saves on the manufacturing cost and molding time of the sand core. When the molten metal enters the upper horizontal runner through the lower section of the sprue, it is filtered by the filter brick and flows into the lower horizontal runner. Then, it flows into the casting area through the ingate, completing the casting of the ceramic roller sleeve wear-resistant ductile iron body. Using the above method, the flow rate of the molten metal is slower and the filling is more stable, resulting in less scouring force in the casting area, reducing the inflow of slag, ensuring the quality of the casting, and improving the casting qualification rate. Attached Figure Description

[0010] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0011] Figure 1 This is a cross-sectional structural schematic diagram of the casting device for wear-resistant ductile iron parts of ceramic roller sleeves for mining machinery provided by this utility model.

[0012] Figure 2 This is a schematic diagram of the structure of the sand core provided by this utility model.

[0013] 101-Upper Sand Box, 102-Upper Box, 103-Middle Sand Box, 104-Middle Box, 105-Lower Box, 106-Lower Sand Box, 107-Filter Brick, 108-Sand Core, 109-Ceramic Inlay Strip, 110-Pouring Area, 111-Upper Section of Straight Casting Runner, 112-Lower Section of Straight Casting Runner, 113-Upper Horizontal Casting Runner, 114-Lower Horizontal Casting Runner, 115-Inner Casting Runner, 116-Top Riser, 117-Installation Groove, 118-Chill Iron, 119-Fixing Hole, 120-Fixing Column. Detailed Implementation

[0014] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0015] Please see Figure 1 and Figure 2 This utility model provides a casting device for wear-resistant ductile iron parts for ceramic roller sleeves in mining machinery. The casting device includes an upper sand box 101, an upper box 102, a middle sand box 103, a middle box 104, a lower box 105, a lower sand box 106, a filter brick 107, a sand core 108, and multiple ceramic inserts 109. The lower sand box 106 is located at the bottom of the middle sand box 103, and the upper sand box 101 is located above the middle sand box 103. The upper box 102 is located inside the upper sand box 101. The middle box 105... 4. The middle sand box 103 is located inside the middle sand box 103. The lower box 105 is located inside the lower sand box 106. The sand core 108 is located at the center of the inner bottom of the lower box 105. The top of the sand core 108 is flush with the end face of the middle box 104. The area between the inner side wall of the lower box 105 and the inner side wall of the middle box 104 and the outer side wall of the sand core 108 is the casting area 110. A plurality of ceramic strips 109 are also evenly arranged inside the lower box 105. The plurality of ceramic strips 109 are evenly arranged inside the casting area 110. The upper box 102 has an upper section 111 of a straight pouring channel at the center of its top, the sand core 108 has a lower section 112 of a straight pouring channel at its center, the sand core 108 has an upper horizontal pouring channel 113 at its bottom, the top of the lower section 112 of the straight pouring channel is connected to the bottom of the upper section 111 of the straight pouring channel, the bottom of the lower section 112 of the straight pouring channel is connected to the upper horizontal pouring channel 113, the lower box 105 has a lower horizontal pouring channel 114 at its inner bottom, the lower horizontal pouring channel 114 is connected to the upper horizontal pouring channel 113, the lower box 105 also has an inner pouring channel 115 at its inner bottom, one end of the inner pouring channel 115 is connected to the lower horizontal pouring channel 114, the other end of the inner pouring channel 115 is connected to the pouring area 110, and the filter brick 107 is placed between the upper horizontal pouring channel 113 and the lower horizontal pouring channel 114.

[0016] In this embodiment, the lower mold 105 has a separate sand core 108. The upper mold 102, the middle mold 104, and the lower mold 105 have parting surfaces. The parting surfaces of the middle mold 104 and the lower mold 105 form the upper horizontal runner 113 and the lower horizontal runner 114. A single sand core 108 is used. The upper mold 102, the middle mold 104, and the lower mold 105 all use high-strength sand, which avoids sand loss due to the lower core, resulting in a better casting appearance quality and saving sand. The manufacturing cost and molding time of core 108 are reduced when molten metal enters the upper horizontal runner 113 through the lower section 112 of the sprue, is filtered by the filter brick 107, flows into the lower horizontal runner 114, and flows into the casting area 110 through the ingate 115, thus completing the casting of the ceramic roller sleeve wear-resistant ductile iron body. Using the above method, the flow rate of molten metal can be slower and the filling of the mold can be more stable, the scouring force in the casting area 110 is smaller, the inflow of slag is reduced, the quality of the casting is guaranteed, and the casting qualification rate is improved.

[0017] Furthermore, the upper box 102 is provided with a plurality of top risers 116, the bottom of each top riser 116 is corresponding to the bottom of the casting area 110, and a plurality of mounting grooves 117 are uniformly provided on the outer side wall of the top of the sand core 108, and a chill 118 is provided inside each mounting groove 117.

[0018] In this embodiment, the top riser 116 and the chiller 118 work together to provide feeding and further venting, allowing the slag and gas in the casting zone 110 to be smoothly discharged from the cast ceramic roller sleeve wear-resistant ductile iron body, avoiding defects such as slag inclusions and porosity, further ensuring the quality of the casting, and also preventing workers from accidentally bringing loose sand or impurities into the casting zone 110.

[0019] Furthermore, the bottom of the lower box 105 is evenly provided with a plurality of fixing holes 119, and each ceramic inlay strip 109 is provided with a fixing post 120 at its bottom, the fixing post 120 being adapted to the fixing hole 119.

[0020] In this embodiment, the installation of the ceramic inlay 109 is facilitated by the fixing hole 119 and the fixing post 120.

[0021] The above-disclosed embodiments are merely preferred embodiments of the present utility model and should not be construed as limiting the scope of the present utility model. Those skilled in the art can understand that implementing all or part of the above-described embodiments and making equivalent changes in accordance with the claims of the present utility model are still within the scope of the utility model.

Claims

1. A casting device for wear-resistant ductile iron parts for ceramic roller sleeves in mining machinery, characterized in that, The system includes an upper sand box, an upper box, a middle sand box, a middle box, a lower box, a lower sand box, filter bricks, sand cores, and multiple ceramic strips. The lower sand box is located at the bottom of the middle sand box, and the upper sand box is located above the middle sand box. The upper box is located inside the upper sand box, the middle box is located inside the middle sand box, and the lower box is located inside the lower sand box. The sand core is located at the center of the inner bottom of the lower box, and the top of the sand core is flush with the end face of the middle box. The area between the inner sidewall of the lower box and the inner sidewall of the middle box and the outer sidewall of the sand core is a casting area. Multiple ceramic strips are also evenly arranged inside the lower box, and the multiple ceramic strips are evenly arranged inside the casting area. The upper box has an upper section of a straight pouring channel at the center of its top, the sand core has a lower section of a straight pouring channel at its center, and the bottom of the sand core has an upper horizontal pouring channel. The top of the lower section of the straight pouring channel is connected to the bottom of the upper section of the straight pouring channel, and the bottom of the lower section of the straight pouring channel is connected to the upper horizontal pouring channel. The bottom of the lower box has a lower horizontal pouring channel, which is connected to the upper horizontal pouring channel. The bottom of the lower box also has an inner pouring channel, one end of which is connected to the lower horizontal pouring channel, and the other end of which is connected to the pouring area. The filter brick is placed between the upper and lower horizontal pouring channels.

2. The casting device for wear-resistant ductile iron parts for ceramic roller sleeves in mining machinery as described in claim 1, characterized in that, The upper box is provided with multiple top risers, and the bottom of each top riser corresponds to the pouring area.

3. The casting device for wear-resistant ductile iron parts for ceramic roller sleeves in mining machinery as described in claim 2, characterized in that, Multiple mounting slots are evenly arranged on the outer side wall of the top of the sand core, and a chill is installed inside each mounting slot.

4. The casting device for wear-resistant ductile iron parts for ceramic roller sleeves in mining machinery as described in claim 3, characterized in that, The bottom of the lower box is provided with a plurality of fixing holes evenly distributed, and each ceramic inlay strip is provided with a fixing post at its bottom, the fixing post being adapted to the fixing hole.

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