Sand core forming machine for hardware casting
By improving the structure of the metal casting sand core forming machine, sand residue is prevented, ensuring the compactness and rapid removal of the sand core. This solves the quality problems caused by sand residue in the existing technology and achieves high-quality sand core production.
Patent Information
- Application Number
- CN202520303698.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-25
- Publication Date
- 2026-02-24
- Estimated Expiration
- 2035-02-25
Smart Images
Figure CN223932540U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of casting technology, and in particular relates to a sand core forming machine for hardware castings. Background Technology
[0002] Sand core technology is an ancient and mature technology, but its development is closely related to sand casting. Sand casting is a method of turning a pre-designed sand template upside down into a model, pouring molten metal into it, and finally cooling it to form a solid shape. Sand core technology, which was developed on the basis of sand casting, was designed to solve the problem that some castings cannot form complex internal structures by simply pouring sand into a mold. Now, a sand core forming machine for hardware castings is used to meet the production needs of sand cores.
[0003] However, existing sand core forming machines used for hardware castings add sand into the extrusion groove from both sides, resulting in sand remaining on the top and sides. This residual sand can cause gaps to form between the extrusion groove and the extrusion block during extrusion, resulting in insufficient compactness inside the sand core and thus affecting the product quality of the sand core. Utility Model Content
[0004] This utility model addresses the problem in existing sand core forming machines for hardware castings where sand is added to the extrusion groove from both sides, resulting in sand residue remaining on the top and sides. This residual sand affects the extrusion groove and extrusion block, causing gaps during extrusion and resulting in an insufficiently dense internal structure of the sand core, thus affecting the product quality. The following technical solution is proposed:
[0005] A sand core forming machine for hardware castings includes a base, a support frame fixedly connected to the top of the base, a hydraulic rod fixedly installed inside the top of the support frame, an extrusion block fixedly connected to the bottom of the hydraulic rod, an extrusion groove fixedly connected to the top of the base below the extrusion block, positioning blocks movably connected to both sides of the top of the extrusion groove, a fixed plate fixedly connected to one end of the positioning block, a motor fixedly connected to the top of the fixed plate, a threaded rod fixedly connected to the output end of the motor, a movable plate threadedly connected to the outer surface of the threaded rod, a slider fixedly connected to the bottom of the movable plate, and the outer surface of the slider slidably connected to the inside of the fixed plate.
[0006] Preferably, each of the positioning blocks has a drop groove on both sides of one end, and magnets are fixedly connected to both sides of one end of the two positioning blocks that are close to each other. Movable rods are fixedly connected to both sides of one end of the positioning blocks at the position below the magnets, and the outer surface of the movable rods is slidably connected to the inside of the extrusion groove.
[0007] Preferably, the slider is T-shaped, and the width of the end of the slider near the movable plate is smaller than the width of the other end.
[0008] Preferably, the movable plate is L-shaped, and the surface of the movable plate is in contact with the top surface of the positioning block.
[0009] Preferably, the positioning block has a discharge hole located on the side of the drop trough.
[0010] Preferably, the top of the positioning block is formed as an inclined surface on both sides of the lower groove.
[0011] The beneficial effects of this utility model are as follows:
[0012] (1) It can prevent residual sand from causing incomplete extrusion between the extrusion groove and the extrusion block, thus making the sand core not dense enough, ensuring that the sand core has consistent density, and effectively guaranteeing the production quality of the sand core.
[0013] (2) It can quickly remove the sand core, effectively protect the integrity of the sand core during removal, and improve the removal rate and product quality of the sand core. Attached Figure Description
[0014] Figure 1 The diagram shown is a structural schematic of a sand core forming machine for hardware castings;
[0015] Figure 2 The diagram shows the installation structure of the positioning block;
[0016] Figure 3 The diagram shown is a schematic of the installation structure of the movable plate;
[0017] Figure 4 The diagram shows the installation structure of the magnet;
[0018] In the diagram: 1. Base; 2. Support frame; 3. Hydraulic rod; 4. Extrusion block; 5. Extrusion groove; 6. Positioning block; 7. Fixing plate; 8. Motor; 9. Threaded rod; 10. Movable plate; 11. Slider; 12. Drop chute; 13. Discharge hole; 14. Magnet; 15. Movable rod. Detailed Implementation
[0019] To make the objectives, technical solutions, and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below in conjunction with the embodiments.
[0020] Example 1
[0021] This utility model provides a sand core forming machine for hardware castings, such as... Figures 1 to 4As shown, the device includes a base 1, a support frame 2 fixedly connected to the top of the base 1, a hydraulic rod 3 fixedly installed inside the top of the support frame 2, an extrusion block 4 fixedly connected to the bottom of the hydraulic rod 3, multiple heating tubes installed inside the extrusion block 4, an extrusion groove 5 fixedly connected to the top of the base 1 below the extrusion block 4, positioning blocks 6 movably connected to both sides of the top of the extrusion groove 5, a fixing plate 7 fixedly connected to one end of the positioning block 6, a motor 8 fixedly connected to the top of the fixing plate 7, a threaded rod 9 fixedly connected to the output end of the motor 8, a movable plate 10 connected to the outer surface of the threaded rod 9 by threads, a slider 11 fixedly connected to the bottom of the movable plate 10, and the outer surface of the slider 11 slidably connected to the inside of the fixing plate 7.
[0022] like Figure 1 and Figure 4 As shown, each of the two positioning blocks 6 has a drop groove 12 on both sides of one end. Magnets 14 are fixedly connected to both sides of one end of the two positioning blocks 6 close to each other. Movable rods 15 are fixedly connected to both sides of one end of the positioning blocks 6 below the magnets 14. The outer surface of the movable rods 15 is slidably connected to the inside of the extrusion groove 5. After the sand core is produced, the positioning blocks 6 on both sides are moved to the sides, so that the magnets 14 no longer attract each other due to magnetic force. At this time, the separation between the two positioning blocks 6 is completed. The movement of the positioning blocks 6 will drive the movable rods 15 to move synchronously inside the extrusion groove 5. After the positioning blocks 6 have moved, the sand core can be quickly removed because the positioning blocks 6 on both sides of the sand core have moved. This effectively protects the integrity of the sand core during removal and improves the removal rate and product quality of the sand core.
[0023] like Figure 1 and Figure 3 As shown, the slider 11 is T-shaped. The width of the end of the slider 11 near the movable plate 10 is smaller than the width of the other end, which can provide stable support, prevent the slider 11 from shaking when it moves, and improve the stability of the slider 11 when it moves.
[0024] like Figure 1 and Figure 3 As shown, the movable plate 10 is L-shaped, and the surface of the movable plate 10 is in contact with the top surface of the positioning block 6. Since the surface of the movable plate 10 is in contact with the top surface of the positioning block 6, the movement of the movable plate 10 will cause the sand to move. The sand in the middle part will enter the squeezing groove 5, and the sand on both sides will be pushed into the falling groove 12, thereby cleaning the sand on the surface of the positioning block 6.
[0025] like Figure 1 and Figure 4 As shown, a discharge hole 13 is provided inside the positioning block 6 on the side of the drop trough 12 to prevent sand from overflowing onto the surface of the positioning block 6 when the drop trough 12 is too full. The discharge hole 13 is used to discharge sand from the drop trough 12.
[0026] like Figure 1 and Figure 4 As shown, the top of the positioning block 6 is inclined on both sides of the drop trough 12, which facilitates the smooth entry of sand into the drop trough 12 along the inclined surface and effectively improves the sand collection rate.
[0027] Working principle: In actual use, when sand cores need to be produced, sand is added into the extrusion groove 5 from both sides. As the operation proceeds, a small amount of sand will fall to the top of the positioning block 6. After the sand is added into the extrusion groove 5, the motor 8 is started. The brush end of the motor 8 rotates, driving the threaded rod 9 to rotate synchronously. The rotation of the threaded rod 9 drives the movable plate 10 to move towards the positioning block 6. Since the surface of the movable plate 10 is in contact with the top surface of the positioning block 6, the movement of the movable plate 10 will drive the sand to move. The sand in the middle part will directly enter the extrusion groove 5, and the sand on both sides will be pushed into the drop trough 12 and then discharged along the discharge hole 13. This can prevent residual sand from causing incomplete extrusion between the extrusion groove 5 and the extrusion block 4, thus making the sand core not dense enough. This ensures that the sand core has consistent density and effectively guarantees the production quality of the sand core.
[0028] Then, the hydraulic rod 3 is activated, which drives the extrusion block 4 to move downward. As the extrusion block 4 moves, it contacts and extrudes the sand inside the extrusion groove 5, heating the sand to complete the production of the sand core. After the sand core is produced, the positioning blocks 6 on both sides move to the sides, so that the magnets 14 no longer attract each other due to magnetic force. At this time, the separation between the two positioning blocks 6 is completed. The movement of the positioning blocks 6 will drive the movable rod 15 to move synchronously inside the extrusion groove 5. After the positioning blocks 6 have moved, the sand core can be quickly removed because the positioning blocks 6 on both sides of the sand core have moved. This effectively protects the integrity of the sand core during removal, improves the removal rate of the sand core and the product quality of the sand core.
[0029] The above embodiments are only used to illustrate the technical solution of this utility model, and are not intended to limit it.
Claims
1. A sand core forming machine for hardware castings, characterized in that, The system includes a base (1), a support frame (2) fixedly connected to the top of the base (1), a hydraulic rod (3) fixedly installed inside the top of the support frame (2), an extrusion block (4) fixedly connected to the bottom of the hydraulic rod (3), an extrusion groove (5) fixedly connected to the top of the base (1) below the extrusion block (4), positioning blocks (6) movably connected to both sides of the top of the extrusion groove (5), a fixing plate (7) fixedly connected to one end of the positioning block (6), a motor (8) fixedly connected to the top of the fixing plate (7), a threaded rod (9) fixedly connected to the output end of the motor (8), a movable plate (10) connected to the outer surface of the threaded rod (9) by threads, a slider (11) fixedly connected to the bottom of the movable plate (10), and the outer surface of the slider (11) slidably connected to the inside of the fixing plate (7).
2. The sand core forming machine for hardware castings according to claim 1, characterized in that: The positioning block (6) has a drop groove (12) on both sides of one end. The two positioning blocks (6) are close to each other and are fixedly connected to magnets (14) on both sides of one end. The positioning block (6) is fixedly connected to movable rods (15) on both sides of one end below the magnets (14). The outer surface of the movable rods (15) is slidably connected to the inside of the extrusion groove (5).
3. A sand core forming machine for hardware castings according to claim 1, characterized in that: The slider (11) is T-shaped, and the width of the end of the slider (11) near the movable plate (10) is smaller than the width of the other end.
4. A sand core forming machine for hardware castings according to claim 1, characterized in that: The movable plate (10) is L-shaped, and the surface of the movable plate (10) is in contact with the top surface of the positioning block (6).
5. A sand core forming machine for hardware castings according to claim 1, characterized in that: The positioning block (6) has a discharge hole (13) located on the side of the lower trough (12).
6. A sand core forming machine for hardware castings according to claim 1, characterized in that: The top of the positioning block (6) is located on both sides of the drop groove (12) and is formed by slope.