CN115383060A

CN115383060A - Sand core processing production line

Info

Publication number: CN115383060A
Application number: CN202211022167.9A
Authority: CN
Inventors: 王雷; 常涛; 卫飞龙; 马浩浩; 杜瑞
Original assignee: National Intelligent Foundry Industry Innovation Center
Current assignee: National Intelligent Foundry Industry Innovation Center
Priority date: 2022-08-25
Filing date: 2022-08-25
Publication date: 2022-11-25

Abstract

A sand core processing production line comprises a turning section, a cleaning section, a coating section and a drying section; a turnover machine is arranged in the turnover section and used for turning the sand core over a certain angle and placing the sand core on a transfer trolley; a wind washing machine is arranged in the cleaning section and used for cleaning loose sand on the surface of the sand core and in the cavity; an applicator is arranged in the application section and is used for applying a coating to the sand core, and the coating can be sprayed, brushed or flow-coated in various ways; and a drying room is arranged in the drying section and used for drying the sand core. The automation and the assembly line operation from the cleaning to the warehousing of various sand cores are realized, and the operation and the management are convenient. The full-line automation from taking out, sand cleaning, coating to drying of the sand core after core making is realized, the production efficiency and the production quality of the sand core treatment process are improved, and the production instability caused by excessive human factors is avoided.

Description

Sand core processing production line

Technical Field

The invention relates to the technical field of casting, in particular to a casting production line.

Background

The manual core making and molding are still the mainstream production process of most domestic foundries at present, but the defects of low efficiency, labor waste, poor environment, low automation degree and the like increasingly restrict the development of the casting industry, and along with the development of a new domestic environmental protection method, the advanced core making and molding production process, production equipment or production mode with high automation and intelligence degree also urgently need to be researched, popularized and applied.

On one hand, the appearance of the 3D printing technology overturns the production mode and the pouring mode of the sand core in the casting industry; on the other hand, with the introduction of automation equipment such as hoisting equipment, microwave drying and coating stations into the casting production industry, the automation level of the casting industry is improved. However, this model is only suitable for the production of medium-sized batches, small sand cores and small castings, and for large sand cores (size 3m and above, weight 3t and above), there still exist many problems, such as unsafe overturning operation, low efficiency, poor application quality, low efficiency, the need for overturning application back and forth, and the like.

Disclosure of Invention

In view of the above problems of unsafe transfer, inefficient transfer, and difficult application of large size cores, there is a need for a sand core handling line that provides for automatic cleaning, turning, application, and drying of the cores.

A sand core processing production line comprises a turning section, a cleaning section, an application section and a drying section; a turnover machine is arranged in the turnover section and used for turning the sand core over a certain angle and placing the sand core on a transfer trolley; a wind washer is arranged in the cleaning section and used for cleaning loose sand on the surface of the sand core and in the cavity; an applicator is arranged in the application section and used for applying a coating to the sand core, wherein the coating can be sprayed, brushed or flow-coated in various ways; and a drying room is arranged in the drying section, and is used for drying the sand core, such as surface drying of the sand core after coating or integral drying after sand core forming.

The technical scheme of the invention has the beneficial effects that: according to the sand core cleaning process, aiming at the problems of large sand cores at present, the measures such as equipment improvement, special tools, process optimization and the like are adopted, so that the automation and the assembly line operation from cleaning to warehousing of various sand cores are realized, and the operation and the management are convenient. The full-line automation of taking out, cleaning and applying the sand core to drying after the core making is completed is realized, the production efficiency and the production quality of the sand core treatment process are improved, and the production instability caused by excessive human factors is avoided.

Drawings

FIG. 1 is a production line block diagram;

FIG. 2 is a schematic view of the applicator construction;

wherein, 1-upright column; 2-clamping; 3-a motion guide rail; 4-coating a plate; 5-paint can.

Detailed Description

In order to more clearly illustrate the technical solutions of the present invention, the technical solutions of the present invention are described in detail with reference to the accompanying drawings, and it is obvious that the following descriptions are some exemplary embodiments of the present invention, and it is obvious for those skilled in the art that other solutions can be obtained according to the embodiments without creative efforts.

The post-treatment of the 3D printing sand core is elaborated by taking a 3D printing core making process as an example. Specifically, in the present embodiment, the sand core for casting is printed by box printing.

A sand core processing production line is based on a sand core produced by adopting 3D printing equipment and comprises a turning section, a cleaning section, an application section and a drying section; the turnover section is mainly used for taking out the sand core from the work box and reasonably turning over the sand core, and a turnover machine is arranged in the turnover section and used for turning over the sand core at a certain angle and placing the sand core on a transfer trolley; a wind washer is arranged in the cleaning section and used for cleaning loose sand on the surface of the sand core and in the cavity; an applicator is arranged in the application section and is used for applying a coating to the sand core, and the coating can be sprayed, brushed or flow-coated in various ways; and a drying room is arranged in the drying section, and is used for drying the sand core, such as a heating drying mode, a microwave drying mode, an infrared drying mode and other various modes.

As an implementation manner of the embodiment, the overturning section comprises a sand cleaning station, a hoisting device, a conveying roller way, an overturning machine and a transfer trolley; the sand cleaning station is a jacking shakeout device which is matched with a working box of the 3D printing equipment, after a box of sand cores are printed, the working box moves to the position above the jacking shakeout device, and loose sand surrounding the sand cores automatically falls into a sand recovery hopper below the jacking shakeout device while the sand cores are taken out in a mode of pushing a bottom plate of the working box upwards; the lifting equipment is used for transferring the sand core which is taken out of the work box and is still arranged on the bottom plate of the work box to the conveying roller way; the conveying roller way is used for storing and butting the sand cores; the turnover machine and the transfer trolley are used for transferring the sand core to the next required process, and particularly when the printing direction of the sand core cannot be directly used for transferring, the turnover machine is required to turn the supporting surface of the sand core to the direction facing the transfer trolley, so that the stability, the quality safety and the like in the transferring process of the sand core are ensured. The overturning section achieves the purposes of automatic taking out of the printed sand core and automatic flow to the next process, and achieves automation of sand core taking out. In this embodiment, the lifting device may be a truss robot, a traveling crane, a cantilever crane, or the like.

As another implementation manner of this embodiment, the turning section further includes a curing room, and the curing room is used to cure the sand core printed by the 3D printing device, so that the sand core is cured and formed and reaches a certain strength. The curing room is internally provided with microwave drying equipment, and the sand core is cured and dried by adopting a wave source which can penetrate through a working box of the printer and the surface layer of the sand core, so that the layers and the layers of the sand core can be well bonded, and the sand core which has enough strength and can be used for casting is formed. Namely, the lifting equipment integrally transfers the working box which moves out of the 3D printing equipment to the transfer trolley, and the transfer trolley sends the sand core to be solidified with the working box into a solidification room to solidify the sand core; and conveying the solidified and received sand core with the working box to the sand cleaning station again. Specifically, the curing room can adopt an electric heating mode to heat and cure the sand core arranged in the working box, so as to improve the strength and hardness of the sand core.

As an implementation manner of this embodiment, the cleaning section is used to clean the surface of the sand core or the sand core in the cavity, so as to clean the surface of the sand core and the surface of the cavity, and the surface quality of the casting at a later stage is not affected. The air washer comprises an automatic air washer and a manual air washer, the automatic air washer can be an air knife arranged in the cleaning section, the air knife is suspended in the cleaning section, and after the sand core enters the cleaning section, the air knife performs purging on the sand core to be cleaned from top to bottom and from left to right, so that the surface of the sand core and the loose sand in a larger cavity are cleaned; and then cleaning the inside of the smaller cavity by using a manual air cleaning machine, wherein the manual air cleaning machine can be a high-pressure air gun, and blowing and washing the loose sand on the inner wall of the smaller cavity in a mode of extending a gun head of the high-pressure air gun into the smaller cavity. Through thoroughly cleaning loose sand on the surface of the sand core and the inner wall of the cavity, the defects of sand adhesion, rough surface and the like possibly occurring on the surface of a casting during casting are avoided.

As an implementation of this embodiment, the application station is used to apply the cleaned sand core from the cleaning station to improve the resistance of the sand core to the hot metal bath, i.e., to apply a high temperature resistant coating to the surface of the sand core that contacts the metal bath. The coating machine comprises a column 1, a clamp 2, a moving guide rail 3 and a coating plate 4; the two motion guide rails 3 are arranged on the ground, the two oppositely arranged upright posts 1 are arranged on the two motion guide rails 3 on the same straight line, and the two upright posts 1 can move along the two motion guide rails 3, so that the distance between the two upright posts 1 is changed, and the sand core clamping device is suitable for clamping sand cores with different sizes; the two clamps 2 are respectively arranged on the two upright posts 1, namely, one clamp 2 is arranged on each upright post 1, each clamp 2 is provided with a transverse clamping jaw and a vertical clamping jaw, the transverse clamping jaws can extend and retract in the horizontal direction, the vertical clamping jaws can extend and retract in the vertical direction, namely, the clamping space of each clamp 2 can be enlarged or reduced, so that the clamping of sand cores with different sizes is realized; meanwhile, the clamp 2 can rotate in the vertical surface where the upright post 1 is positioned, so that different parts of the sand core can be conveniently coated; the coating plate 4 is arranged above the upright post 1, and the coating plate 4 is of a flat plate structure with a hollow structure. The applicator shown can achieve both flowsheet and spray application. Preferably, in order to adapt to the relative or opposite movement of the two uprights 1, the application plate 4 is connected with the two uprights 1 in a sliding manner.

As another way of realizing the embodiment, the applicator further comprises a paint tank 5, the paint tank 5 is overlapped on the application plate 4 through a pipeline, and paint is applied to the clamped sand core through the hollow structure of the application plate 4. The clamp 2 continuously rotates the clamped sand core to realize the coating of the sand core in each direction. Specifically, in this embodiment, the coating machine is in a flow pattern mode, the hollow structure of the coating plate 4 is a plurality of grooves with through holes, the coating enters the grooves through a pipeline connected with the coating tank 5, and flows into the accommodating space of the sand core formed by the two upright posts 1 through the through holes in the grooves to perform flow pattern on the sand core, and the clamp 2 rotates the sand core to be coated, so that the omnibearing flow pattern on the sand core is realized. As another example, the spraying of the sand core may be achieved by injecting a coating material with a certain pressure through the application plate 4 into the receiving space formed by the two pillars 1.

As another realization mode of the embodiment, an enclosing wall is arranged around the two upright posts, and the enclosing wall can prevent the paint from splashing in the application process, improve the environment of the application section and reduce the pollution of the paint to the environment.

As another implementation of this embodiment, a paint collection tank with a conical structure is also provided below the enclosure to collect paint not absorbed by the sand core during application. Preferably, a filter screen can be arranged at the outlet of the coating collecting tank, and the qualified coating after filtration can be recycled to the coating tank 5, so that the coating can be recycled.

As an implementation manner of this embodiment, the drying section is used to dry the coated sand core, that is, to perform surface drying on the sand core, or to perform drying on the coating on the surface of the sand core. The drying room is used for drying the sand core, and can adopt a heating drying mode, a microwave drying mode, an infrared drying mode and the like. For example, the heated high-temperature air can be sent into the drying room by adopting a natural gas heating mode to perform surface drying on the sand core arranged in the drying room.

As another implementation manner of the embodiment, the sand core processing production line further comprises a three-dimensional warehouse, wherein the three-dimensional warehouse is used for placing or storing the sand cores to be assembled after the cleaning, the coating and the drying; the three-dimensional warehouse comprises a plurality of warehouse positions, a stacker crane, a roller way, a transfer trolley and the like, wherein the transfer trolley transfers the dried sand cores from the drying section to the stacker crane, and the stacker crane places the sand cores at corresponding positions.

As another way of realisation of this embodiment, the transfer trolley is provided in each block of the core treatment production, and is not only used for the transfer of the cores in the respective block, but also for the transfer of the cores between the respective blocks. For example, a transfer vehicle in the cleaning section may transfer a cleaned core to the interface of the cleaning section and the application section and hand off the core to the transfer vehicle in the application section to effect inter-section core hand-off and inter-process core transfer.

The above embodiment is only a description of a typical application of the technical solution of the present invention, and may be reasonably expanded without creative efforts.

Claims

1. A sand core processing production line is characterized by comprising a turning section, a cleaning section, a coating section and a drying section; a turnover machine is arranged in the turnover section and used for turning the sand core over a certain angle and placing the sand core on a transfer trolley;

a wind washer is arranged in the cleaning section and used for cleaning loose sand on the surface of the sand core and in the cavity;

an applicator is arranged in the application section and used for applying a coating to the sand core;

and a drying room is arranged in the drying section and used for drying the sand core.

2. The sand core processing production line of claim 1, wherein the turning section comprises a sand cleaning station, a lifting device, a conveying roller way, a turning machine and a transfer trolley;

the sand cleaning station is a jacking shakeout device matched with a working box of the 3D printing equipment;

the lifting equipment is used for transferring the sand core which is taken out of the work box and is still arranged on the bottom plate of the work box to the conveying roller way;

the conveying roller way is used for storing and butting the sand cores;

the tilter and the transfer car are used to transfer the sand core to the next desired process.

3. The sand core processing line of claim 2, wherein the turning section further comprises a curing room to cure the sand cores printed by the 3D printing device.

4. The sand core processing line of claim 1, wherein the cleaning section is adapted to clean a surface of a sand core or a sand core within a cavity; the air washer comprises an automatic air washer and a manual air washer, the automatic air washer is an air knife arranged in the cleaning section, and the air knife is suspended in the cleaning section; the manual air washer is a high-pressure air gun.

5. The sand core processing line of claim 1 wherein said applicator includes a post, a clamp, a motion rail and an applicator plate, said post being disposed on said motion rail and movable therealong, said motion rail being disposed on the floor, said clamp being disposed on said post, said applicator plate being disposed on top of said post.

6. The sand core processing line of claim 5, wherein the applicator plate is a flat plate with a cutout.

7. A sand core processing line as claimed in claim 6, wherein said applicator further comprises a paint canister connected to said applicator plate by a conduit.

8. The sand core processing line of claim 6, wherein the column is provided with an enclosure wall around its periphery to prevent splashing of the coating during application.

9. The sand core processing line of claim 8, wherein a coating collection basin of conical configuration is further provided below the enclosure wall.

10. The sand core handling line of any one of claims 1-9, further comprising a three-dimensional magazine for holding sand cores to be core assembled after cleaning, application and drying.