CN215467895U

CN215467895U - Casting molding assembly of shell for rail transit

Info

Publication number: CN215467895U
Application number: CN202121957802.3U
Authority: CN
Inventors: 刘畅; 王立永; 孙鸣; 唐广铁; 余志田
Original assignee: Tianjin Changyi Industry Co ltd
Current assignee: Tianjin Changyi Industry Co ltd
Priority date: 2021-08-20
Filing date: 2021-08-20
Publication date: 2022-01-11
Anticipated expiration: 2031-08-20

Abstract

The utility model belongs to the technical field of the cast of track traffic casing and specifically relates to a casting shaping subassembly of casing for track traffic is related to, including the core box that is used for the shaping core and the template that is used for shaping foundry goods casting die board, the core box includes from last down to fold last core box, well core box and the core box down of winding in proper order, and well core box includes two blocks of curb plates, a front end plate and a back end plate, and front end plate and back end plate peg graft respectively at the both ends of two blocks of curb plates. After the core box splicing is completed, and after the core box is filled with the filling and the molding sand is compacted, when the mold is opened to take out the core, the upper core box is taken out upwards, the lower core box is taken out downwards, then the two side plates, the front end plate and the rear end plate are separated towards the periphery, and the core with the complex appearance can be kept complete.

Description

Casting molding assembly of shell for rail transit

Technical Field

The application relates to the field of casting of rail transit casing, especially relate to a cast molding subassembly of casing for rail transit.

Background

The majority of housings for rail transit are high-speed rails or reducer cases for automobiles, and the like, and the requirements for structural strength are high.

As shown in fig. 1, a conventional housing structure for rail transit is a hollow shell-shaped structure, and considering factors of weight and material, the housing is made of cast iron material with high strength, and the thickness of the housing is reduced. Therefore, the inner surface of the case may be very irregular, which is very difficult in the process of molding the inner surface.

Generally, a shell casting is formed by combining a core and a casting die for casting, wherein the core is placed in the casting die, so that a casting space is formed between the outer surface of the core and the inner surface of the casting die cavity for forming the shell casting.

The mold core is formed by filling molding sand in a mold core box, compacting and then demolding. For a mold core with a smooth surface, the mold core is very simple to demold, but for a mold core with an irregular surface shape, the quality of the outer surface of the mold core is very easily influenced by adopting a mode of demolding after an upper mold and a lower mold are opened, so that the molding quality of a shell workpiece is influenced. Therefore, there is a need for a more efficient way to mold cores with more complex profiles.

SUMMERY OF THE UTILITY MODEL

In order to solve the problem of core shaping quality difference, the utility model aims at providing a casting forming assembly of casing for track traffic.

The application provides a casting forming assembly of casing for track traffic adopts following technical scheme:

the utility model provides a foundry molding subassembly of casing for track traffic, is including the core box that is used for the shaping core and the template that is used for shaping foundry goods casting die board, the core box includes from last upper core box, center core box and the lower core box that down folds in proper order, and center core box includes two curb plates, a front end plate and a back end plate, and front end plate and back end plate peg graft respectively at the both ends of two curb plates.

By adopting the technical scheme, after the core box is spliced and completed, and after the core box is filled with the filling and the molding sand is compacted, when the mold is opened to take out the core, the upper core box is taken out upwards, the lower core box is taken out downwards, then the two side plates, the front end plate and the rear end plate are separated from the periphery, and the core with complex appearance can be kept complete.

Preferably, the front end plate and the rear end plate are inserted and connected along the direction perpendicular to the side plates.

Through adopting above-mentioned technical scheme, can reduce the possibility that front end plate and back end plate lateral plate relatively removed to promote fashioned core's stability, promote the shaping quality.

Preferably, the splicing seams between the two ends of the rear end plate and the side plates are inclined planes, and the inclined planes are inclined from the outer side of the core box to the inner side and along the direction from the end part of the rear end plate to the middle part.

Through adopting above-mentioned technical scheme, the separation of rear end plate and curb plate is convenient for in-process of shaping core, reduces the possibility that both disturbed each other in the form removal process.

Preferably, the template includes template and lower template, and the template includes the upper molding body, first runner forming part and sprue channel locating piece, and the lower template includes lower molding body, buffering runner forming part and second runner forming part, and the upper molding body has the shape of casing upper half surface, and the lower molding body has the shape of casing the latter half surface, and the position that the upper molding body was located corresponds with lower molding body position, and the position that buffering runner forming part was located corresponds with the position at position between first runner forming part and the sprue channel locating piece, and the position that the one end that sprue channel locating piece was kept away from to first runner forming part is located the position and is corresponded with second runner forming part, and the other end and the lower molding body coupling of second runner forming part.

Through adopting above-mentioned technical scheme, template and lower template can the shaping go up mould and lower mould in the utilization, after last mould and lower mould compound die after the shaping, the pouring channel, the buffering runner, first runner, the second runner is linked together with last mould chamber and lower mould chamber each other, thereby the pouring of the molten iron of being convenient for, the final shaping foundry goods, the molten iron is at the in-process that flows, can be through the effect of buffering runner, first runner and second runner, thereby the impact force that greatly reduced molten iron flows, thereby promote casting quality.

Preferably, the upper shaping plate comprises two upper shaping bodies, and the lower shaping plate comprises two lower shaping bodies.

Through adopting above-mentioned technical scheme, adopt the forming mode in two chambeies of a mould, can promote casting efficiency.

Preferably, a fourth flow channel forming part is arranged between the two lower forming parts, two ends of the fourth flow channel forming part are respectively connected with the two lower forming parts integrally, the upper forming plate further comprises a third flow channel forming part, the third flow channel forming part is positioned between the two upper forming parts, the position of one end of the third flow channel forming part corresponds to the position of the pouring channel positioning block, and the position of the other end of the third flow channel forming part corresponds to the position of the fourth flow channel forming part.

By adopting the technical scheme, the third runner and the fourth runner can be poured from the part between the two die cavities, so that the pouring speed is improved, the speed of pouring molten iron into the die cavities is kept, and the temperature of the molten iron poured into the die cavities is ensured not to be too different.

Preferably, the bottom of the lower core box is provided with a positioning groove, the top of the lower molding body is integrally connected with a positioning molding part, and the shape of the positioning molding part is the same as that of the positioning groove.

Through adopting above-mentioned technical scheme, utilize the fashioned core of core box down to place in the lower mould intracavity to the cooperation of core and lower mould promotes the assembly precision, guarantees that the shape of fashioned work piece meets the requirements.

Preferably, the upper core box is provided with a material injection hole, the top of the upper molding body is integrally connected with a second positioning molding part, and the shape of the second positioning molding part is the same as that of the material injection hole.

Through adopting above-mentioned technical scheme, the position of the fashioned core of notes material hole can mutually support with the fashioned die cavity shape of second location forming part to promote the assembly precision of core in the die cavity, thereby promote the shaping precision of work piece.

In summary, the present application has the following technical effects:

1. the middle part of the core box is designed into a mode that a side plate, a front end plate and a rear end plate are matched with each other, so that the effect of improving the appearance forming quality of the core is achieved;

2. through design buffering runner formed part, first runner formed part and second runner formed part, can the shaping buffering runner, first runner and second runner to reduce the flow impact force of molten iron, promote pouring quality.

Drawings

Fig. 1 is a schematic view of the structure of a casting.

Fig. 2 is a schematic structural view of the core box.

Fig. 3 is a schematic view showing the structure of the middle core box and the lower core box in a highlighted manner in the present embodiment.

Fig. 4 is a schematic structural view of the upper template.

Fig. 5 is a schematic structural view of the lower plate.

Description of reference numerals: 1. a core box; 11. a core box is arranged; 111. a material injection hole; 12. a middle core box; 121. two side plates; 122. a front end plate; 123. a rear end plate; 13. a lower core box; 131. positioning a groove; 21. an upper template; 211. an upper molded body; 2111. a second positioning molding member; 212. a first flow channel formation; 213. a pouring channel positioning block; 214. a third flow channel molding; 22. a lower template; 221. a lower molded body; 2211. positioning the forming part; 222. buffering the runner molding part; 223. a second flow channel formation; 224. a fourth flow channel molding member.

Detailed Description

As shown in fig. 2, the present embodiment describes a casting molding assembly of a housing for rail transit, which includes a core box 1 and a template, wherein the core box 1 is used for molding a core, the template is used for molding a casting template of a casting, and the molded core is placed in a mold cavity of the casting template, so that the mold cavity forms a shell-like structure to mold the housing casting.

As shown in fig. 2, the core box 1 comprises an upper core box 11, a middle core box 12 and a lower core box 13 which are sequentially overlapped from top to bottom, the lower end of the lower core box 13 is closed, the upper end of the upper core box 11 is provided with a material injection hole 111, molding sand is injected from the material injection hole 111 and enters a cavity of the core box 1, then vibration and compaction are carried out, finally, the upper core box 11, the middle core box 12 and the lower core box 13 are dismantled, and the core is the molding sand in the core box 1.

The upper core box 11 and the lower core box 13 are generally easy to remove, the middle core box 12 in the middle position is relatively difficult to remove, and the shape of the part formed by the middle core box 12 is also complex. For this purpose, as shown in fig. 3, the core box 12 may be designed as a split structure, which includes two side plates 121, a front end plate 122 and a rear end plate 123, the front end plate 122 and the rear end plate 123 are respectively inserted into two ends of the two side plates 121, and the front end plate 122 and the rear end plate 123 are preferably inserted in a direction perpendicular to the side plates 121. In this embodiment, since the thickness of the rear end plate 123 is large, the width of the insertion groove formed in the side plate 121 is large, and the structural strength of the side plate 121 is reduced, so that the joint between the rear end plate 123 and the side plate 121 can be formed as a slope inclined from the outside of the core box 12 to the inside in the direction of the middle portion along the end of the rear end plate 123, and at this time, the shape of the end of a part of the core can be molded by the side plate 121, and the thickness of the side plate 121 into which the rear end plate 123 is inserted can be reduced.

In the process of molding the core, the front end plate 122 and the rear end plate 123 are limited by the two side plates 121, so that high stability can be kept, and displacement can not be generated in the process of compacting molding sand, thereby ensuring the molding quality of the core. In the process of removing the mold, the two side plates 121 are firstly removed to the outside, and then the front end plate 122 and the rear end plate 123 are removed, so that the possibility that the side plates 121 interfere with the front end plate 122 and the rear end plate 123 in the process of removing the mold is low, and the molding quality of the surface of the core is improved.

As shown in fig. 4 and 5, the mold plates include an upper mold plate 21 and a lower mold plate 22, the upper mold plate 21 is used for molding a mold cavity of the upper mold plate, the lower mold plate 22 is used for molding a mold cavity of the lower mold plate, the mold core is placed in the mold cavities of the upper mold plate and the lower mold plate, and after the upper mold plate and the lower mold plate are closed, the mold is poured into the mold plates to mold a casting.

As shown in fig. 4 and 5, in this embodiment, the upper mold plate 21 includes two upper mold bodies 211, the lower mold plate 22 includes two lower mold bodies 221, the upper mold bodies 211 have the shape of the outer surface of the upper half portion of the housing, the lower mold bodies 221 have the shape of the outer surface of the lower half portion of the housing, and the upper mold bodies 211 and the lower mold bodies 221 are located at positions corresponding to each other, so as to ensure that the upper mold cavity and the lower mold cavity are aligned with each other after the upper mold plate and the lower mold plate are closed. Two cavitys of a mould, two foundry goods of once casting moulding are adopted to this embodiment, promote shaping efficiency.

As shown in fig. 4 and 5, the upper mold plate 21 further includes a first flow channel molding member 212, a gate positioning block 213, and a third flow channel molding member 214, and the lower mold plate 22 further includes a buffer flow channel molding member 222, a second flow channel molding member 223, and a fourth flow channel molding member 224. The position of the buffer flow channel molding piece 222 corresponds to the position of the position between the first flow channel molding piece 212 and the sprue positioning block 213, the position of one end of the first flow channel molding piece 212, which is far away from the sprue positioning block 213, corresponds to the position of the second flow channel molding piece 223, the other end of the second flow channel molding piece 223 is integrally connected with the lower molding piece 221, two ends of the fourth flow channel molding piece 224 are respectively integrally connected with the two lower molding pieces 221, the third flow channel molding piece 214 is positioned between the two upper molding pieces 211, the position of one end of the third flow channel molding piece 214 corresponds to the position of the sprue positioning block 213, and the position of the other end of the third flow channel molding piece 214 corresponds to the position of the fourth flow channel molding piece 224. At this time, after the die plates formed by the upper die plate 21 and the lower die plate 22 are closed, the first runner is communicated with the buffer runner and the second runner and is mutually staggered, the third runner is communicated with the buffer runner and the fourth runner and is mutually staggered, and at this time, molten iron entering the casting runner can simultaneously enter the die cavity along the buffer runner, the first runner, the second runner, the buffer runner, the third runner and the fourth runner, so that the molten iron is uniformly filled in the die cavity, the temperature difference of the molten iron at each position is small, the shrinkage rates of the molten iron are substantially the same, and the purpose of improving the forming quality of castings is finally achieved. And because the first runner is mutually staggered with the buffer runner and the second runner, and the third runner is mutually staggered with the buffer runner and the fourth runner, the speed of the molten iron finally flowing into the die cavity is relatively gentle, and the molten iron in the die cavity cannot be greatly impacted, so that the quality of the casting is greatly improved.

Since the core needs to be placed in the mold plate to form a mold cavity that is exactly the same shape as the casting, the installed orientation of the core and mold plate is directly related to the formed shape of the casting. As shown in fig. 3, in order to facilitate the positioning of the mold core, a positioning groove 131 is formed at the bottom of the lower core box 13, as shown in fig. 5, a positioning molding 2211 is integrally connected to the top of the lower molding 221, the shape of the positioning molding 2211 is the same as that of the positioning groove 131, as shown in fig. 4, a second positioning molding 2111 is integrally connected to the top of the upper molding 211, and the shape of the second positioning molding 2211 is the same as that of the injection hole 111 in fig. 2. In this way, the shape of the core part formed by the positioning groove 131 can be completely matched with the lower template formed by the positioning molding part 2211, and the shape of the core part formed by the material injection hole 111 can be completely matched with the upper template formed by the second positioning molding part 2211, so that the stability of the core in the upper template and the lower template can be improved by matching in such a way, and the shape of the formed casting can be ensured.

The embodiments of the present invention are preferred embodiments of the present application, and the scope of protection of the present application is not limited by the embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. The utility model provides a foundry forming subassembly of casing for track traffic, is including core box (1) that is used for the shaping core and the template that is used for shaping foundry goods casting die board, its characterized in that, core box (1) includes from last core box (11), well core box (12) and lower core box (13) that down fold in proper order, and well core box (12) include two curb plates (121), a front end plate (122) and a back end plate (123), and front end plate (122) and back end plate (123) are pegged graft respectively at the both ends of two curb plates (121).

2. The cast molding assembly of a rail transit housing as claimed in claim 1, characterized in that the front end plate (122) and the rear end plate (123) are both plugged in a direction perpendicular to the side plates (121).

3. The cast molding assembly of the rail transit housing as claimed in claim 2, wherein the joint seam between the two ends of the rear end plate (123) and the side plate (121) is a slope, and the slope is inclined from the outside of the core box (12) to the inside along the direction from the end of the rear end plate (123) to the middle.

4. The cast molding assembly of a housing for rail transit according to claim 2, wherein the mold plate comprises an upper mold plate (21) and a lower mold plate (22), the upper mold plate (21) comprises an upper molding member (211), a first runner molding member (212) and a sprue locating block (213), the lower mold plate (22) comprises a lower molding member (221), a buffer runner molding member (222) and a second runner molding member (223), the upper molding member (211) has the shape of the outer surface of the upper housing half, the lower molding member (221) has the shape of the outer surface of the lower housing half, the upper molding member (211) is located at a position corresponding to the position of the lower molding member (221), the buffer runner molding member (222) is located at a position corresponding to the position between the first runner molding member (212) and the sprue locating block (213), one end of the first runner molding member (212) away from the sprue locating block (213) is located at a position corresponding to the position of the second runner molding member (223), the other end of the second flow channel molding member (223) is integrally connected to the lower molding member (221).

5. The cast molding assembly of a housing for rail transit according to claim 4, characterized in that the upper template (21) comprises two upper profiles (211) thereon and the lower template (22) comprises two lower profiles (221) thereon.

6. The cast molding assembly of a housing for rail transit according to claim 5, wherein a fourth flow channel molding member (224) is disposed between the two lower molding members (221), two ends of the fourth flow channel molding member (224) are respectively and integrally connected with the two lower molding members (221), the upper molding plate (21) further comprises a third flow channel molding member (214), the third flow channel molding member (214) is disposed between the two upper molding members (211), one end of the third flow channel molding member (214) is located at a position corresponding to the position of the pouring channel positioning block (213), and the other end of the third flow channel molding member is located at a position corresponding to the position of the fourth flow channel molding member (224).

7. The casting and forming assembly of the rail transit shell as claimed in any one of claims 1 to 6, wherein a positioning groove (131) is formed at the bottom of the lower core box (13), a positioning forming member (2211) is integrally connected to the top of the lower mold body (221), and the shape of the positioning forming member (2211) is the same as that of the positioning groove (131).

8. The casting and forming assembly of the rail transit shell as claimed in claim 7, wherein the upper core box (11) is provided with a material injection hole (111), the top of the upper forming body (211) is integrally connected with a second positioning forming member (2111), and the shape of the second positioning forming member (2211) is the same as that of the material injection hole (111).