Full-automatic shell core machine for manufacturing phenolic resin precoated sand core

Abstract

The invention belongs to the technical field of mold manufacturing, and discloses a full-automatic shell core machine for manufacturing a phenolic resin precoated sand core, which comprises a bucket type sand feeding machine, a lower rack is mounted on one side of the bucket type sand feeding machine, an upper rack is movably connected to the top end of the lower rack, a sand shooting cylinder core head is movably connected to the interior of the upper rack, and the lower rack is movably connected to the top end of the lower rack. A workbench is fixedly installed on one side of the top end of the lower rack, a fixed mold plate is fixedly installed on one side of the interior of the workbench, a movable mold plate is movably installed on the other side of the interior of the workbench, and a core receiving frame conveying line is installed at the position, located at the bottom end of the workbench, of the interior of the lower rack. Compared with the prior art, a manual or semi-automatic mode in the prior art is changed, the manual operation time is shortened, the production speed and yield of the sand core are greatly improved, the requirement for manpower can be reduced, the production cost can be reduced, meanwhile, personal errors are reduced, and the size precision and surface quality of the sand core are improved.

Description

Technical Field

[0001] The invention belongs to the technical field of mold manufacturing, and in particular relates to a full-automatic shell core machine for making phenolic resin coated sand cores. Background Art

[0002] In the foundry industry, sand cores are important auxiliary tools for casting small and complex workpieces. The traditional sand core manufacturing process has many defects, such as low sand core strength, poor dimensional accuracy, and cumbersome coating treatment. In order to solve these problems, the phenolic resin coated sand core process has been developed. This process uses phenolic resin to cover the surface of the sand core, which improves the strength, high temperature resistance and dimensional stability of the sand core, thereby improving the quality of the casting.

[0003] Currently, the shell core machines available on the market are mainly semi-automatic or manually operated, which are cumbersome to operate, inefficient, and have poor stability. In the process of making phenolic resin coated sand cores, the sand cores need to be stacked layer by layer and evenly coated with resin, which is difficult to ensure accuracy and efficiency in manual operation. In addition, although the semi-automatic shell core machine has a certain degree of automation, it still requires manual intervention, and it is difficult to achieve fully automated production.

[0004] With the development of modern industry, the requirements for casting product quality and production efficiency are getting higher and higher. Therefore, there is an urgent need for an efficient, stable and controllable fully automatic shell core machine to meet the needs of industrial production. Summary of the invention

[0005] The present invention aims at the problems that the prior art is mainly semi-automatic or manual operation, which is cumbersome, inefficient and has poor stability. In the process of making phenolic resin coated sand cores, the sand cores need to be stacked layer by layer and the resin is evenly coated, which is difficult to ensure accuracy and efficiency in manual operation. In addition, although the semi-automatic shell core machine has a certain degree of automation, it still requires manual intervention and is difficult to achieve fully automated production. The following technical solutions are proposed:

[0006] A fully automatic shell core machine for making phenolic resin coated sand cores, comprising: a bucket-type sand loading machine, a lower frame is installed on one side of the bucket-type sand loading machine, an upper frame is movably connected to the top of the lower frame, a sand shooting tube core head is movably connected inside the upper frame, a workbench is fixedly installed on one side of the top of the lower frame, a fixed template is fixedly installed on one side of the workbench, a movable template is movably installed on the other side of the workbench, and a core frame conveyor line is installed at the bottom end of the workbench inside the lower frame.

[0007] As a preferred embodiment of the above technical solution, a ton bag bucket of a sand loading machine is fixedly installed at the bottom of the bucket type sand loading machine, a ton bag bucket sand outlet pipe mouth is installed at the bottom of the ton bag bucket of the sand loading machine, a sand inlet of the sand loading machine is fixedly installed at the bottom end of the ton bag bucket sand outlet pipe mouth, and a sand outlet is installed at the top of the bucket type sand loading machine near one side of the upper frame.

[0008] As a preferred embodiment of the above technical solution, a sand storage hopper is fixedly installed at the top of the upper frame below the sand outlet, a material sensor is embedded in the middle of one end of the sand storage hopper, and an air storage tank is installed at the top of the upper frame on one side of the sand storage hopper, and the bottom end of the air storage tank is connected to the main air inlet through a pipeline.

[0009] As a preferred embodiment of the above technical solution, a downward pressure cylinder is fixedly installed on the top edge of the upper frame, and an air return valve is fixedly installed on the top of the downward pressure cylinder.

[0010] As a preferred embodiment of the above technical solution, a push-out cylinder is movably connected inside the upper frame, one end of the push-out cylinder is fixedly connected to a core head of a sand-shooting tube, and one end of the core head of the sand-shooting tube is fixedly mounted with a sand scraping plate.

[0011] As a preferred embodiment of the above technical solution, a left-right adjustment structure of the upper frame is fixedly installed on one side of the top end of the lower frame, and the left-right adjustment structure of the upper frame includes a left-right adjustment hand wheel and a screw rod. The screw rod and the upper frame are connected by threads, and the upper frame is slidably connected to the top end of the lower frame.

[0012] As a preferred embodiment of the above technical solution, a turning reducer is installed on one side of the top end of the lower frame, and the output end of the turning reducer is fixedly connected to the workbench.

[0013] As a preferred embodiment of the above technical solution, an electric control box is fixedly installed on the top of the lower frame at a position on one side of the workbench, and the flip reducer is installed on one side of the electric control box.

[0014] As a preferred embodiment of the above technical solution, a return sand conveyor belt is installed inside the lower frame near one end of the core frame conveyor line, and the outlet direction of the return sand conveyor belt is located at the top of the sand inlet of the sand loading machine.

[0015] The beneficial effects of the present invention are:

[0016] (1) This method automates the production of sand cores, changes the manual or semi-automatic method in the prior art, reduces the time of manual operation, greatly improves the production speed and output of sand cores, and can reduce the demand for labor, reduce production costs, and reduce human errors, thereby improving the dimensional accuracy and surface quality of sand cores;

[0017] (2) Return sand can reduce the amount of fresh materials used, thereby reducing production costs and material losses. Mixing return sand and fresh materials can make the particle size distribution of the mortar more uniform, enhance the fluidity and adhesion of the mortar, and the use of return sand reduces the input of fresh materials, thereby reducing pollution to the environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 The structure diagram of a fully automatic shell core machine for making phenolic resin coated sand cores in Example 1 is shown;

[0019] Figure 2 Shown is a front view of a fully automatic shell core machine for making phenolic resin coated sand cores in Example 1;

[0020] Figure 3 Shown is a left view of a fully automatic shell core machine for making phenolic resin coated sand cores in Example 1.

[0021] In the figure: 1. Bucket type sand loader; 2. Ton bag bucket of sand loader; 3. Sand outlet of ton bag bucket; 4. Sand inlet of sand loader; 5. Sand outlet; 6. Sand storage hopper; 7. Material sensor; 8. Down-pressure cylinder; 9. Return air valve; 10. Main air inlet; 11. Push-out cylinder; 12. Left and right adjustment structure of upper frame; 13. Turnover reducer; 14. Workbench; 15. Core frame conveyor line; 16. Return sand conveyor belt; 17. Gas storage tank; 18. Sand-shooting tube core head; 19. Scraper plate; 20. Fixed template; 21. Moving template; 22. Electric control box; 23. Upper frame; 24. Lower frame. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solution and advantages of the embodiments of the present invention more clear, the technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments.

[0023] Example 1

[0024] The present invention provides a fully automatic shell core machine for making phenolic resin coated sand cores, such as Figures 1 to 3As shown, it includes: a bucket-type sand loading machine 1, a lower frame 24 is installed on one side of the bucket-type sand loading machine 1, an upper frame 23 is movably connected to the top of the lower frame 24, a sand-shooting tube core head 18 is movably connected inside the upper frame 23, a workbench 14 is fixedly installed on one side of the top of the lower frame 24, a fixed template 20 is fixedly installed on one side of the inside of the workbench 14, a movable template 21 is movably installed on the other side of the inside of the workbench 14, a heating wire is arranged inside the movable template 21, and the inside of the mold is heated by electric heating, a digital temperature controller is installed on the outside of the lower frame 24, the digital temperature controller automatically controls the stability of the inside of the mold, and the temperature control range is 0-400°C, a driving cylinder is installed inside the workbench 14, one end of the driving cylinder is fixedly connected to the movable template 21, an ejector is installed inside the movable template 21, and one end of the ejector is connected to a positioning cylinder, and a core frame conveyor line 15 is installed at the bottom end of the workbench 14 inside the lower frame 24.

[0025] like Figure 1 and Figure 2 As shown, a ton bag bucket 2 of the sand loading machine is fixedly installed at the bottom of the bucket type sand loading machine 1, a ton bag bucket sand outlet pipe 3 is installed at the bottom of the ton bag bucket sand loading machine 2, a sand inlet 4 of the sand loading machine is fixedly installed at the bottom end of the ton bag bucket sand outlet pipe 3 of the bucket type sand loading machine 1, and a sand outlet 5 is installed at the top of the bucket type sand loading machine 1 near the side of the upper frame 23;

[0026] The material inside the ton bag bucket 2 of the sand loading machine enters into the sand outlet pipe 3 of the ton bag bucket, then enters into the sand inlet 4 of the sand loading machine along the sand outlet pipe 3 of the ton bag bucket, finally enters into the bucket type sand loading machine 1 along the sand inlet 4 of the sand loading machine, and then is discharged along the sand outlet 5 at the top of the bucket type sand loading machine 1, thereby completing the automatic loading process and changing the manual loading method, which is simpler and faster.

[0027] like Figure 1 and Figure 2 As shown, a sand storage hopper 6 is fixedly installed at the top of the upper frame 23 below the sand outlet 5, an electric control valve is installed at the bottom of the sand storage hopper 6 to control the falling of the material inside the sand storage hopper 6, a material sensor 7 is embedded in the middle of one end of the sand storage hopper 6, and an air storage tank 17 is installed at the top of the upper frame 23 at one side of the sand storage hopper 6, and the bottom of the air storage tank 17 is connected to the main air inlet 10 through a pipeline;

[0028] The discharged material can be collected through the sand storage hopper 6, and the collected material can be detected under the action of the material sensor 7 to change the detection difficulty. At the same time, gas can be added to the gas storage tank 17 under the action of the main air inlet 10, so that the gas inside the gas storage tank 17 is sufficient.

[0029] like Figure 2 and Figure 3As shown, a downward pressure cylinder 8 is fixedly installed on the top edge of the upper frame 23, and a return valve 9 is fixedly installed on the top of the downward pressure cylinder 8. A push-out cylinder 11 is movably connected inside the upper frame 23, and one end of the push-out cylinder 11 is fixedly connected to a sand-shooting tube core head 18, and a sand scraping plate 19 is fixedly installed on one end of the sand-shooting tube core head 18. A lifting plate is installed at the bottom end of the downward pressure cylinder 8, and the push-out cylinder 11 is fixedly installed on the lifting plate. A mounting frame is fixedly installed on the outer side of the sand-shooting tube core head 18, and the mounting frame is slidably connected to the outer side of the lifting plate.

[0030] Since the sand-shooting tube core head 18 is driven to move horizontally under the action of the pushing cylinder 11, and when the pressing cylinder 8 works, the sand-shooting tube core head 18 is pushed to move vertically, the difficulty of automatic horizontal and vertical movement of the sand-shooting tube core head 18 is changed.

[0031] like Figure 1 and Figure 2 As shown, a left-right adjustment structure 12 of the upper frame is fixedly installed on one side of the top of the lower frame 24. The left-right adjustment structure 12 of the upper frame includes a left-right adjustment hand wheel and a screw rod. The screw rod and the upper frame 23 are connected by threads, and the upper frame 23 is slidably connected to the top of the lower frame 24.

[0032] The upper frame 23 can be driven to slide left and right by the upper frame left and right adjustment structure 12, which changes the difficulty of sliding left and right of the upper frame 23, so that the position of the upper frame 23 can be adjusted and changed.

[0033] like Figure 1 and Figure 2 As shown, a turning reducer 13 is installed on one side of the top of the lower frame 24, and the output end of the turning reducer 13 is fixedly connected to the workbench 14. An electric control box 22 is fixedly installed on the top of the lower frame 24 at a position on one side of the workbench 14, and the turning reducer 13 is installed on one side of the electric control box 22;

[0034] The workbench 14 can be driven to rotate under the action of the turning reducer 13, which changes the difficulty of rotating the workbench 14, and the electronic components are controlled under the action of the electric control box 22, so that the electronic components run according to the pre-set program.

[0035] like Figure 1 and Figure 2 As shown, a return sand conveyor belt 16 is installed inside the lower frame 24 near one end of the core frame conveyor line 15, the exit direction of the return sand conveyor belt 16 is located at the top of the sand inlet 4 of the sand feeding machine, and a screen is installed on the top of the return sand conveyor belt 16. The remaining sand is recovered through the return sand conveyor belt 16, and the remaining sand passes through the screen before entering the return sand conveyor belt 16 to screen out the agglomerated part;

[0036] It can facilitate the reflow of residual materials in the manufacturing process, change the difficulty of material reflow, and then realize the automatic recycling of materials.

[0037] Working principle: In the process of automatically producing hollow sand cores, the device drives the movable template 21 to move by driving the cylinder. When the movable template 21 moves, it closes the mold with the fixed template 20. At this time, the sand-shooting tube core head 18 is pushed forward by the action of the ejection cylinder 11. At this time, the pressing cylinder 8 is started. When the pressing cylinder 8 moves, the sand-shooting tube core head 18 is pressed down and is at the top position of the movable template 21 and the fixed template 20. Then the sand-shooting tube core head 18 shoots sand, so that the sand enters the movable template 21 and the fixed template 20. Then the sand-shooting tube core head 18 is closed, and the pressing cylinder 8 is started. The reset drives the sand-shooting tube core head 18 to reset, and at this time, the push-out cylinder 11 is running. When the push-out cylinder 11 is running, it drives the sand-shooting tube core head 18 to reset to the sand-discharging position. At this time, the material inside the sand storage hopper 6 falls into the sand-shooting tube core head 18. At this time, the material is delayed in solidification inside the sand-shooting tube core head 18. At the same time, the material sensor 7 detects the gravity of the material discharge, and then starts the flip reducer 13. When the flip reducer 13 is running, it drives the workbench 14 to flip 180 degrees, and at this time, the movable template 21 is flipped 180 degrees, and at this time, the movable template 21 and the fixed template 20 are more The remaining sand is dumped, and the sand return conveyor belt 16 is running at this time. The dumped sand enters the sand inlet 4 of the sand feeding machine along the sand return conveyor belt 16. When the sand inside the workbench 14 is dumped, the workbench 14 is reset at this time, and then the sand return conveyor belt 16 stops conveying. Then, the movable template 21 is moved under the action of the driving cylinder, and the movable template 21 and the fixed template 20 are opened at this time, and then the workbench 14 is driven to rotate 90 degrees, so that the movable template 21 rotates 90 degrees, and then the core frame conveyor line 15 automatically rises, and the positioning cylinder inside the movable template 21 drives The ejector pin moves, so that the sand core inside the movable template 21 is ejected, and the ejected sand core falls to the top of the core frame conveyor line 15, and then the core frame conveyor line 15 descends, and the core frame conveyor line 15 conveys the sand core after descending, and at this time, a shell core production process is completed. This method automates the production of sand cores, changes the manual or semi-automatic method in the prior art, reduces the time of manual operation, greatly improves the production speed and output of sand cores, and can reduce the demand for labor, reduce production costs, and reduce human errors, and improve the dimensional accuracy and surface quality of sand cores;

[0038] The sand returned from the return sand conveyor belt 16 enters the sand inlet 4 of the sand loading machine, and then enters the bucket type sand loading machine 1 along the sand inlet 4 of the sand loading machine, and then continues to be transported to the sand storage hopper 6 along the bucket type sand loading machine 1. At the same time, the external materials enter the sand outlet pipe 3 of the ton bag bucket along the sand loading machine 2, and finally enter the bucket type sand loading machine 1 along the sand outlet pipe 3 of the ton bag bucket, and then enter the sand storage hopper 6 along the sand outlet 5 of the bucket type sand loading machine 1. At this time, the returned sand and the newly added materials are synchronously mixed and loaded along the bucket type sand loading machine 1. The returned sand can reduce the amount of fresh materials used, thereby reducing production costs and material losses. Mixing the returned sand and fresh materials can make the particle size distribution of the mortar more uniform, enhance the fluidity and adhesion of the mortar, and the use of the returned sand reduces the input of fresh materials, thereby reducing pollution to the environment.

[0039] At the same time, when the device is automatically producing hollow sand cores, the movable template 21 is driven to move by the driving cylinder. When the movable template 21 moves, it is molded with the fixed template 20. At this time, the sand-shooting tube core head 18 is pushed forward by the action of the pushing cylinder 11. At this time, the pressing cylinder 8 is started. When the pressing cylinder 8 moves, the sand-shooting tube core head 18 is pressed down and is at the top position of the movable template 21 and the fixed template 20. Then the sand-shooting tube core head 18 shoots sand, so that the sand enters the movable template 21 and the fixed template 20. Then the sand-shooting tube core head 18 is closed, and the pressing cylinder 8 is started. The pressing cylinder 8 is reset to drive the sand-shooting tube core head 18 to reset, and the pushing cylinder 11 is running at this time. When the pushing cylinder 11 is running, it drives the sand-shooting tube core head 18 to reset to the sand lowering position. At this time, the material inside the sand storage hopper 6 falls into the sand-shooting tube core head 18. At this time, the material is delayed in solidification inside the sand-shooting tube core head 18, and the material sensor 7 detects the lower The gravity of the material is then used to move the movable template 21 under the action of the driving cylinder, so that the movable template 21 and the fixed template 20 are opened, and then the workbench 14 is driven to rotate ninety degrees, so that the movable template 21 rotates ninety degrees, and then the core frame conveyor line 15 automatically rises. At this time, the internal positioning cylinder of the movable template 21 drives the ejector to move, so that the sand core inside the movable template 21 is ejected, and the ejected sand core falls to the top of the core frame conveyor line 15, and then the core frame conveyor line 15 descends, and the core frame conveyor line 15 conveys the sand core after it descends. At this time, a solid sand core production process is completed. This method automates the production of sand cores, changes the manual or semi-automatic method in the prior art, reduces the time of manual operation, greatly improves the production speed and output of sand cores, and can reduce the demand for labor, reduce production costs, and at the same time reduce human errors, and improve the dimensional accuracy and surface quality of sand cores.

[0040] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them.

Claims

1. A fully automatic shell core machine for making phenolic resin coated sand cores, characterized in that: include: A bucket-type sand loading machine (1) is provided with a lower frame (24) installed on one side of the bucket-type sand loading machine (1), the top of the lower frame (24) is movably connected to an upper frame (23), a sand-shooting tube core head (18) is movably connected inside the upper frame (23), a workbench (14) is fixedly installed on one side of the top of the lower frame (24), a fixed template (20) is fixedly installed on one side of the inside of the workbench (14), a movable template (21) is movably installed on the other side of the inside of the workbench (14), and a core frame conveyor line (15) is installed inside the lower frame (24) at the bottom end of the workbench (14).

2. The fully automatic shell core machine for making phenolic resin coated sand cores according to claim 1, characterized in that: A ton bag bucket (2) of the sand loading machine is fixedly installed at the bottom of the bucket-type sand loading machine (1); a ton bag bucket sand outlet pipe (3) is installed at the bottom of the ton bag bucket sand loading machine; a sand loading machine sand inlet (4) is fixedly installed at the bottom of the bucket-type sand loading machine (1) at the bottom end of the ton bag bucket sand outlet pipe (3); and a sand outlet (5) is installed at the top of the bucket-type sand loading machine (1) at a position close to one side of the upper frame (23).

3. The fully automatic shell core machine for making phenolic resin coated sand cores according to claim 1, characterized in that: A sand storage hopper (6) is fixedly installed at the top of the upper frame (23) at a position below the sand outlet (5), a material sensor (7) is embedded and installed in the middle of one end of the sand storage hopper (6), and an air storage tank (17) is installed at the top of the upper frame (23) at a position on one side of the sand storage hopper (6), and the bottom end of the air storage tank (17) is connected to a main air inlet (10) through a pipeline.

4. The fully automatic shell core machine for making phenolic resin coated sand cores according to claim 3, characterized in that: A downward pressure cylinder (8) is fixedly mounted on the top edge of the upper frame (23), and an air return valve (9) is fixedly mounted on the top of the downward pressure cylinder (8).

5. The fully automatic shell core machine for making phenolic resin coated sand cores according to claim 2, characterized in that: The upper frame (23) is movably connected with a push-out cylinder (11) inside, one end of the push-out cylinder (11) is fixedly connected to a sand-shooting tube core head (18), and one end of the sand-shooting tube core head (18) is fixedly mounted with a sand scraping plate (19).

6. The fully automatic shell core machine for making phenolic resin coated sand cores according to claim 1, characterized in that: An upper frame left-right adjustment structure (12) is fixedly mounted on one side of the top end of the lower frame (24), the upper frame left-right adjustment structure (12) comprising a left-right adjustment hand wheel and a screw rod, the screw rod and the upper frame (23) are connected by threads, and the upper frame (23) is slidably connected to the top end of the lower frame (24).

7. A fully automatic shell core machine for making phenolic resin coated sand cores according to claim 6, characterized in that: A turning reducer (13) is installed on one side of the top end of the lower frame (24), and the output end of the turning reducer (13) is fixedly connected to the workbench (14).

8. The fully automatic shell core machine for making phenolic resin coated sand cores according to claim 7, characterized in that: An electric control box (22) is fixedly installed at the top of the lower frame (24) at a position on one side of the workbench (14), and the turning speed reducer (13) is installed on one side of the electric control box (22).

9. The fully automatic shell core machine for making phenolic resin coated sand cores according to claim 8, characterized in that: A sand return conveyor belt (16) is installed inside the lower frame (24) near one end of the core frame conveyor line (15), and the outlet direction of the sand return conveyor belt (16) is located at the top of the sand inlet (4) of the sand loading machine.

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