Sand core anti-collision demolding structure

Abstract

The utility model discloses a sand core anti-collision demolding structure which comprises an upper mold and a lower mold, a lower forming groove extending downwards is formed in the middle of the top surface of the lower mold, the upper mold covers the top surface of the lower mold, an upper forming part extending downwards and formed in the middle of the bottom surface of the upper mold is located in the lower forming groove, and a lower forming groove is formed in the middle of the bottom surface of the lower mold. An installation groove is formed in the middle of the top face of the upper die above the upper forming part, a lower groove is formed in the bottom face, over the upper forming part, of the installation groove, a lifting plate is inserted into the lower groove in a sleeved mode, a plurality of forming pin rods are fixed to the bottom face of the lifting plate, and the middles of the forming pin rods are inserted into vertical through holes formed in the bottom face of the lower groove in a sleeved mode. When the upper die is lifted to the highest point, the forming pin rod can be lifted, so that the bottom of the forming pin rod cannot be positioned in the lower die, the lower die can normally and transversely move, a sand core part in the lower die can be conveniently taken, the normal use of the upper die and the lower die can be ensured, and the normal use of the forming pin rod can also be ensured.

Description

Technical fields:

[0001] This utility model relates to the field of sand core molding mold technology, and more specifically to a sand core anti-collision demolding structure. Background technology:

[0002] Currently, the shock absorber towers in automobiles are located in the engine compartment under the hood. Their main function is to install and fix the shock absorbers, while also supporting and stabilizing the vehicle body.

[0003] Existing shock absorber towers are formed by casting, which requires the manufacture of corresponding sand core components. These sand core components are formed by pressing together an upper and lower mold. During the forming process, a forming pin is installed on the upper mold and inserted into the inner cavity of the lower mold to form a vertical insertion hole in the sand core component. However, the forming pin is quite long, and its length extending into the lower mold is also quite long. When opening the mold, the upper mold usually needs to be raised a certain distance before the lower mold is moved laterally. Then, the sand core component formed in the lower mold is removed. Because the length of the forming pin in the lower mold is quite long, when the upper mold is raised to its highest point, part of the bottom of the forming pin is still in the lower mold. This causes the bottom of the forming pin to collide and break when the lower mold moves laterally, resulting in damage to the lower mold and the forming pin, affecting its use. Utility model content:

[0004] The purpose of this utility model is to overcome the shortcomings of the existing technology and provide a sand core anti-collision demolding structure. When the upper mold is raised to the highest point, its forming pin can still be raised, so that its bottom is not in the lower mold, allowing the lower mold to move laterally normally and making it convenient to remove the sand core part in the lower mold. It can ensure the normal use of the upper and lower molds, as well as the normal use of the forming pin.

[0005] The solution of this utility model to the aforementioned technical problem is:

[0006] A sand core anti-collision demolding structure includes an upper mold and a lower mold. The lower mold has a downwardly extending lower forming groove formed in the middle of its top surface. The upper mold covers the top surface of the lower mold. The downwardly extending upper forming part formed in the middle of the bottom surface of the upper mold is located in the lower forming groove. The upper mold has an installation groove formed in the middle of its top surface above the upper forming part. The installation groove is located on the bottom surface directly above the upper forming part, and a lower groove is formed. A lifting plate is inserted into the lower groove. Multiple forming pins are fixed on the bottom surface of the lifting plate. The middle part of the forming pin is inserted into a vertical through hole formed in the bottom surface of the lower groove. Its outer side wall is close to the inner side wall of the corresponding vertical through hole. The lower part of the forming pin extends out of the bottom end of the vertical through hole and into the lower forming groove. The outer side wall of the forming pin is close to the inner side wall of the corresponding vertical through hole.

[0007] An upper lifting column is fixed to the top surface of the middle part of the lifting plate, and an intermediate support column is fixed to the middle of the bottom surface of the mounting groove. The transverse rod is located in the mounting groove. The middle part of the transverse rod is movably connected to the upper part of the intermediate support column through a hinge shaft. The left end of the transverse rod is movably connected to the top of the upper lifting column through a hinge shaft. A side groove is formed on the right side wall of the upper mold. The right end of the transverse rod passes through a vertical elongated through groove formed on the inner wall of the side groove and extends into the side groove.

[0008] An outer vertical rod is inserted into the side groove. The lower part of the outer vertical rod is inserted into the upper through hole formed on the bottom surface of the side groove and the lower through hole formed on the top surface of the lower mold directly below the upper through hole. The top end of the outer vertical rod is movably connected to the outer end of the horizontal rod through a hinge shaft.

[0009] An annular positioning groove is formed on the lower outer side wall of the outer vertical rod. A transverse through hole extending outward is formed on the inner side wall of the lower through hole corresponding to the annular positioning groove. A transverse connecting block is fixed on the outer side wall of the lower mold corresponding to the lower through hole. A buffer positioning hole is formed in the middle of the outer end face of the transverse connecting block. A positioning through hole is formed in the middle of the inner end of the buffer positioning hole. The positioning through hole communicates with and corresponds to the transverse through hole. The positioning block and the compression spring are inserted into the buffer positioning hole. A protrusion is formed in the middle of the inner end face of the positioning block. The protrusion is inserted into the positioning through hole and the transverse through hole. The inner end of the protrusion is spherical and extends out of the transverse through hole and is inserted into the annular positioning groove. An outer end plate is fixed on the outer end face of the transverse connecting block.

[0010] The lifting plate has multiple vertical through holes. The rod of the positioning guide screw is inserted into the vertical through hole, and the screwed part at its bottom end extends out of the bottom surface of the lifting plate and is screwed onto the bottom surface of the lower groove. A lifting spring is inserted into the lower part of the positioning guide screw. The top end of the lifting spring is applied to the bottom surface of the lifting plate, and the bottom end of the lifting spring is applied to the bottom surface of the lower groove.

[0011] The outstanding effect of this utility model is:

[0012] Compared with existing technologies, it can raise the forming pin even when the upper mold is raised to its highest point, so that its bottom is not in the lower mold, allowing the lower mold to move laterally normally and making it easy to remove the sand core part in the lower mold. It can ensure the normal use of the upper and lower molds, as well as the normal use of the forming pin. Attached image description:

[0013] Figure 1 This is a partial structural schematic diagram of the present invention;

[0014] Figure 2 yes Figure 1 A schematic diagram of the local structure from a different angle;

[0015] Figure 3This is a partial sectional view of the present invention;

[0016] Figure 4 This is a partial sectional view of another part of this utility model. Detailed implementation method:

[0017] For example, see below. Figures 1 to 4 As shown, a sand core anti-collision demolding structure includes an upper mold 10 and a lower mold 20. The lower mold 20 is fixed to a lower mold fixing plate below (which is a conventional structure and not shown in the attached figure). The top surface of the upper mold 10 is fixed to an upper mold fixing plate above (which is a conventional structure and not shown in the attached figure). A downwardly extending lower forming groove is formed in the middle of the top surface of the lower mold 20. The upper mold 10 covers the top surface of the lower mold 20. A downwardly extending upper forming part 11 formed in the middle of the bottom surface of the upper mold 10 is located in the lower forming groove. The upper mold 10 is located above the upper forming part 11. A mounting groove 12 is formed in the middle of the top surface. A lower groove 13 is formed on the bottom surface directly above the upper forming part 11. The lifting plate 14 is inserted into the lower groove 13. A plurality of forming pins 15 are fixed on the bottom surface of the lifting plate 14. The middle part of the forming pin 15 is inserted into the vertical through hole formed on the bottom surface of the lower groove 13. Its outer side wall is close to the inner side wall of the corresponding vertical through hole. The lower part of the forming pin 15 extends out of the bottom end of the vertical through hole and into the lower forming groove. The outer side wall of the forming pin 15 is close to the inner side wall of the corresponding vertical through hole.

[0018] The top surface of the lifting plate 14 is fixed with an upper lifting column 141, the bottom surface of the mounting groove 12 is fixed with an intermediate support column 121, the transverse rod 16 is located in the mounting groove 12, the middle part of the transverse rod 16 is movably connected to the upper part of the intermediate support column 121 through a hinge shaft, and the left end of the transverse rod 16 is movably connected to the top of the upper lifting column 141 through a hinge shaft (the hinge through hole at the left end of the transverse rod 16 is a transverse elongated through hole to ensure that the transverse rod 16 will not be stuck with the upper lifting column 141 when it is tilted). A side groove 17 is formed on the right side wall of the upper mold 10, and the right end of the transverse rod 16 passes through the vertical elongated through groove 171 formed on the inner wall of the side groove 17 and extends into the side groove 17.

[0019] An outer vertical rod 18 is inserted into the side groove 17. The lower part of the outer vertical rod 18 is inserted into the upper through hole 172 formed on the bottom surface of the side groove 17 and the lower through hole 21 formed on the top surface of the lower mold 20 directly below the upper through hole 172. The top end of the outer vertical rod 18 is movably connected to the outer end of the horizontal rod 16 through a hinge shaft (the hinge through hole of the outer end of the horizontal rod 16 is a horizontal elongated through hole to ensure that the horizontal rod 16 will not be stuck with the outer vertical rod 18 when it is tilted).

[0020] Furthermore, an annular positioning groove 181 is formed on the lower outer sidewall of the outer vertical rod 18. A transverse through hole 22 extending outward is formed on the inner sidewall of the lower through hole 21 corresponding to the annular positioning groove 181. A transverse connecting block 30 is fixed on the outer sidewall of the lower mold 20 corresponding to the lower through hole 21. A buffer positioning hole 31 is formed in the middle of the outer end face of the transverse connecting block 30. A positioning through hole 32 is formed in the middle of the inner end of the buffer positioning hole 31. The positioning through hole 32 communicates with and corresponds to the transverse through hole 22. The positioning block 33 and the compression spring 34 are inserted into the buffer positioning hole 31. The inner end face of the positioning block 33 has a protrusion 331 formed in the middle. The protrusion 331 is inserted into the positioning through hole 32 and the transverse through hole 22. The inner end of the protrusion 331 is spherical, extending out of the transverse through hole 22 and inserted into the annular positioning groove 181. An outer end plate 35 is fixed on the outer end face of the transverse connecting block 30. The outer end plate 35 has a threaded through hole formed in the middle. The screw part of the clamping adjusting bolt 36 is screwed into the threaded through hole. The inner end of the screw part extends into the buffer positioning hole 31. One end of the clamping spring 1 is applied to the inner end face of the screw part, and the other end is applied to the outer end face of the positioning block 31. The pressure of the clamping spring 1 can be changed by rotating the clamping adjusting bolt 36.

[0021] A guide sleeve is fitted onto the inner wall of the transverse through hole 22. The protrusion 331 is inserted into the guide sleeve, with its outer side wall close to or in close contact with the inner side wall of the guide sleeve. An inner groove is formed in the center of the inner end face of the transverse connecting block 30, communicating with the positioning through hole 32. The outer end of the guide sleeve is located within the inner groove, and a radially extending edge is formed on its outer side wall. This radially extending edge is clamped between the inner end face of the inner groove and the outer side wall of the lower mold 20, thus fixing the guide sleeve. The guide sleeve guides the lateral movement of the protrusion 331.

[0022] Furthermore, the lifting plate 14 is formed with multiple vertical through holes. The rod of the positioning guide screw 3 is inserted into the vertical through hole, and the screwed part at its bottom end extends out of the bottom surface of the lifting plate 14 and is screwed onto the bottom surface of the lower groove 13. The lower part of the rod of the positioning guide screw 3 is fitted with a lifting spring 4. The top end of the lifting spring 4 is applied to the bottom surface of the lifting plate 14, and the bottom end of the lifting spring 4 is applied to the bottom surface of the lower groove 13.

[0023] The lifting spring 4 is covered with a protective sleeve 5. The bottom surface of the protective sleeve 5 presses against the bottom surface of the lower groove 13, and the top surface presses against the bottom surface of the lifting plate 14.

[0024] The middle part of the forming pin 15 at the lower forming groove is formed with a transverse through hole. A middle block 6 is inserted in the transverse through hole. The middle block 6 can be a metal block with a hardness lower than that of aluminum alloy. The outer side wall of the middle block 6 presses against the inner side wall of the transverse through hole, and the middle block 6 covers the entire transverse through hole.

[0025] In this embodiment, during the sand core forming process, the upper mold 10 is pressed down and covered on the top surface of the lower mold 20 to achieve the covering of the upper mold 10 and the lower mold 20. At this time, the inner end of the protrusion 331 is inserted into the annular positioning groove 181 to position the outer vertical rod 18.

[0026] After the sand core part is formed, the upper mold 10 is lifted. During the lifting, the inner end of the protrusion 331 is inserted into the annular positioning groove 181, which pulls the outer vertical rod 18. At this time, the horizontal rod 16 is tilted, and the height of its outer end is lower than the height of its inner end. This tension drives the lifting plate 14 to lift. During the lifting, the forming pin 15 is pulled up, thereby loosening it between it and the inner wall of the forming through hole in the sand core part, ensuring the lifting of the forming pin 15. During the lifting process, the elastic restoring force of the lifting spring 4 quickly lifts the lifting plate 14. The upper mold 10 is raised, causing the forming pin 15 to rise rapidly. At the same time, the upper mold 10 continues to rise until its pulling force exceeds the pulling force of the protrusion 331 on the positioning of the outer vertical rod 18. This causes the protrusion 331 to disengage from the annular positioning groove 181. Simultaneously, its compression spring 1 is compressed. At this point, the upper mold 10 and the lower mold 20 are completely separated. The bottom of the forming pin 15 is no longer in the lower forming groove of the lower mold 20. Then, the lower mold 20 moves laterally, offset from the upper mold 10, and the sand core part in the lower mold 20 can be removed by subsequent equipment, which is very convenient.

[0027] The tension of the protrusion 331 on the outer vertical rod 18 is to prevent the elastic restoring force of the lifting spring 4 from failing to pull the forming pin 15, and to assist in lifting the forming pin 15, so that the forming pin 15 can be lifted normally when the upper mold 10 and the lower mold 20 are separated.

[0028] When the lifting spring 4 and the protrusion 331 fail to lift the forming pin 15 due to their combined tension on the outer vertical rod 18, the bottom of the forming pin 15 remains in the lower mold 20 during operation. When the lower mold 20 moves laterally, it impacts the forming pin 15. Since the forming pin 15 has a transverse through-hole in its middle, and a middle block 6 is inserted in the through-hole, the strength of the forming pin 15 at the transverse through-hole is relatively low. Therefore, during the impact, the lower part of the forming pin 15 at the transverse through-hole will break off, without affecting the connection to the upper part of the forming pin 15 or damaging the upper mold 10. This reduces the number of damaged parts, ensuring that the upper mold 10 and lower mold 20 are not damaged, or only minimally damaged, requiring only localized repairs later.

[0029] Finally, it should be noted that the above embodiments are merely representative examples of this utility model. Obviously, this utility model is not limited to the above embodiments and can have many variations. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of this utility model should be considered to fall within the protection scope of this utility model.

Claims

1. A sand core anti-collision demolding structure, comprising an upper mold (10) and a lower mold (20), characterized in that: The lower mold (20) has a downwardly extending lower forming groove formed in the center of its top surface. The upper mold (10) covers the top surface of the lower mold (20). The downwardly extending upper forming part (11) formed in the center of the bottom surface of the upper mold (10) is located in the lower forming groove. The upper mold (10) above the upper forming part (11) has a mounting groove (12) formed in the center of its top surface. The mounting groove (12) is located on the bottom surface directly above the upper forming part (11) and has a lower groove (11) formed therein. 3) The lifting plate (14) is inserted into the lower groove (13). Multiple forming pins (15) are fixed on the bottom surface of the lifting plate (14). The middle part of the forming pin (15) is inserted into the vertical through hole formed on the bottom surface of the lower groove (13). Its outer side wall is close to the inner side wall of the corresponding vertical through hole. The lower part of the forming pin (15) extends out of the bottom end of the vertical through hole and extends into the lower forming groove. The outer side wall of the forming pin (15) is close to the inner side wall of the corresponding vertical through hole. The top surface of the lifting plate (14) is fixed with an upper lifting column (141), the bottom surface of the mounting groove (12) is fixed with an intermediate support column (121), the horizontal rod (16) is in the mounting groove (12), the middle part of the horizontal rod (16) is movably connected to the upper part of the intermediate support column (121) through a hinge shaft, the left end of the horizontal rod (16) is movably connected to the top of the upper lifting column (141) through a hinge shaft, a side groove (17) is formed on the right side wall of the upper mold (10), and the right end of the horizontal rod (16) passes through the vertical elongated through groove (171) formed on the inner wall of the side groove (17) and extends into the side groove (17).

2. The anti-collision demolding structure for sand cores according to claim 1, characterized in that: An outer vertical rod (18) is inserted into the side groove (17). The lower part of the outer vertical rod (18) is inserted into the upper through hole (172) formed on the bottom surface of the side groove (17) and the lower through hole (21) formed on the top surface of the lower mold (20) directly below the upper through hole (172). The top end of the outer vertical rod (18) is movably connected to the outer end of the horizontal rod (16) through a hinge shaft.

3. The sand core anti-collision demolding structure according to claim 2, characterized in that: An annular positioning groove (181) is formed on the lower outer sidewall of the outer vertical rod (18). A transverse through hole (22) extending outward is formed on the inner sidewall of the lower through hole (21) corresponding to the annular positioning groove (181). A transverse connecting block (30) is fixed on the outer sidewall of the lower mold (20) corresponding to the lower through hole (21). A buffer positioning hole (31) is formed in the middle of the outer end face of the transverse connecting block (30). A positioning through hole (32) is formed in the middle of the inner end of the buffer positioning hole (31). The hole (32) is connected to and corresponds to the transverse through hole (22). The positioning block (33) and the compression spring (34) are inserted in the buffer positioning hole (31). The inner end face of the positioning block (33) is formed with a protrusion (331). The protrusion (331) is inserted in the positioning through hole (32) and the transverse through hole (22). The inner end of the protrusion (331) is spherical. It extends out of the transverse through hole (22) and is inserted into the annular positioning groove (181). An outer end plate (35) is fixed on the outer end face of the transverse connecting block (30).

4. The anti-collision demolding structure for sand cores according to claim 3, characterized in that: The outer end plate (35) has a threaded through hole formed in the middle. The screw part of the tightening adjustment bolt (36) is screwed into the threaded through hole. The inner end of the screw part extends into the buffer positioning hole (31). One end of the tightening spring (34) is applied to the inner end face of the screw part, and the other end is applied to the outer end face of the positioning block (33).

5. The anti-collision demolding structure for sand cores according to claim 3, characterized in that: A guide sleeve is fitted on the inner wall of the transverse through hole (22), and the protrusion (331) is inserted into the guide sleeve, with its outer wall close to or in close contact with the inner wall of the guide sleeve.

6. The anti-collision demolding structure for sand cores according to claim 1, characterized in that: The lifting plate (14) has multiple vertical through holes formed on it. The rod of the positioning guide screw (3) is inserted into the vertical through hole. The screwed part at its bottom end extends out of the bottom surface of the lifting plate (14) and is screwed onto the bottom surface of the lower groove (13). The lower part of the positioning guide screw (3) is fitted with a lifting spring (4). The top end of the lifting spring (4) is pressed against the bottom surface of the lifting plate (14), and the bottom end of the lifting spring (4) is pressed against the bottom surface of the lower groove (13).

7. The anti-collision demolding structure for sand cores according to claim 6, characterized in that: The lifting spring (4) is covered with a protective sleeve (5), the bottom surface of which presses against the bottom surface of the lower groove (13) and the top surface of which presses against the bottom surface of the lifting plate (14).

8. The anti-collision demolding structure for sand cores according to claim 1, characterized in that: The middle part of the forming pin (15) at the lower forming groove is formed with a transverse through hole, and a middle block (6) is inserted in the transverse through hole. The outer side wall of the middle block (6) presses against the inner side wall of the transverse through hole, and the middle block (6) covers the entire transverse through hole.

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