Chiller forming equipment for evanescent mode

Abstract

The invention relates to the technical field of forming equipment, in particular to chiller forming equipment for an evanescent mode, which comprises a rack, a lower mold, a lower pressing seat, an upper mold, a conveying pipe and an ejection block, the ejection block is connected in the lower mold in a sliding manner; an ejection electric push rod is fixedly connected in the lower mold; after the upper mold enters the lower mold, the air exhaust mechanism exhausts air in the lower mold to reduce air in the lower mold, and when the graphite chilling block in the mold is pressed, the air in the graphite chilling block is exhausted outwards; the piston cylinder, the piston block and the connecting rod are arranged on the lower die, before the graphite chilling block powder is pressed, the graphite chilling block powder is vacuumized, the air pressure around the graphite chilling block powder is reduced, and therefore air in the graphite chilling block powder is separated out, the situation that the air in the graphite chilling block powder is not discharged in time is reduced, and the service life of the graphite chilling block powder is prolonged. And therefore, the graphite chilling block has the conditions of pores and looseness.

Description

Technical Field

[0001] The invention relates to the technical field of molding equipment, in particular to a cold iron molding equipment for lost foam. Background Art

[0002] Lost foam casting is an advanced casting process. First, a foam model consistent with the shape of the casting is made, coated with refractory material and buried in a sand box. During casting, the model vaporizes and disappears when exposed to high temperature, and the molten metal takes its place to form. Lost foam casting has the advantages of high precision, low cost and low pollution, and is widely used in the production of complex castings in the fields of automobiles, machinery, etc. The main purpose of using chillers in lost foam casting is to speed up the local cooling rate of castings, thereby refining grains, reducing defects such as shrinkage cavities and shrinkage, effectively improving the quality and performance of castings, and increasing the yield rate of castings; the chillers used in lost foam are usually made of metal materials, such as graphite chillers; when making lost foam, the chillers are placed in the parts that need to be cooled, and then molding and pouring are carried out; There are many methods for forming graphite chill for lost foam. The most common method is powder grinding, which grinds the graphite chill raw material into powder, mixes with adhesive, uses a mold to press and shape, and then sintering. When the powder grinding method is used to press graphite chill, due to the residual air in the mold, and during the pressing process, the raw material in the mold is pressed from powder to block, the volume is reduced, and the air in the raw material powder cannot be discharged in time, resulting in pores and looseness in the graphite chill, which in turn causes limitations.

[0003] For this purpose, we propose a chilled iron forming equipment for lost foam. Summary of the invention

[0004] In view of the deficiencies of the prior art, the present invention provides a chilled iron forming device for lost foam, which overcomes the deficiencies of the prior art and aims to solve the problems in the background technology.

[0005] To achieve the above object, the present invention provides the following technical solution: a chilled iron forming device for lost foam, comprising: A frame, a lower mold, a lower press seat, an upper mold, a feed pipe and an ejector block; the lower mold is fixedly connected to the frame; the ejector block is slidably connected to the lower mold; an ejector electric push rod is fixedly connected to the lower mold; the output end of the ejector electric push rod is fixedly connected to the ejector block; the lower press seat is slidably connected to the frame; a switching block is slidably connected to the lower press seat, an electric push rod is connected between the lower press seat and the frame, and a switching motor is fixedly connected to the lower press seat; the output end of the switching motor is fixedly connected to a screw rod that matches the thread of the switching block; the upper mold and the feed pipe are both fixedly connected to the switching block; The lower mold is provided with an exhaust mechanism; after the upper mold enters the lower mold, the exhaust mechanism exhausts air in the lower mold to reduce the air in the lower mold, and during the process of pressing the graphite chill in the lower mold, the air in the graphite chill is discharged to the outside.

[0006] Preferably, the vacuum mechanism includes a piston cylinder, a piston block, a connecting rod, and an vacuum pipe; a receiving groove is provided in the lower mold; the piston cylinder is fixedly connected in the receiving groove; the piston block is slidably connected in the piston cylinder; the connecting rod is U-shaped, and one end is slidably connected to the lower mold, and the other end is fixedly connected to the piston block; a return spring is fixedly connected in the receiving groove; the top end of the return spring is fixedly connected to the connecting rod; one end of the vacuum pipe is connected to the piston cylinder, and the other end is connected to the lower mold.

[0007] Preferably, the ejection block and the upper mold are both provided with a surrounding groove and a pushing groove; the pushing groove is connected to the surrounding groove; a pushing rod is slidably connected in the pushing groove; a flexible sealing ring is provided in the surrounding groove; a pushing plate is fixedly connected to the flexible sealing ring; and the pushing plate is fixedly connected to the pushing rod.

[0008] Preferably, annular grooves are provided on the ejection block and the upper mold; an annular block is slidably connected in the annular groove; one end of the push rod close to the annular block is arranged in an oblique shape, and one end of the annular block close to the push rod is arranged in an oblique shape that fits the push rod; an electric push rod is fixedly connected in the annular groove; and the output end of the electric push rod is fixedly connected to the push rod.

[0009] By arranging a piston cylinder, a piston block and a connecting rod on the lower mold, the graphite chilled iron powder is evacuated before being pressed, thereby reducing the air pressure around the graphite chilled iron powder, thereby allowing the air in the graphite chilled iron powder to precipitate, thereby reducing the air in the graphite chilled iron powder that cannot be discharged in time, thereby causing pores and looseness in the graphite chilled iron.

[0010] Preferably, a connecting groove is provided on the lower mold; a sealing plate is rotatably connected in the connecting groove; the upper end of the sealing plate is rotatably connected to the connecting groove, and the notch of the connecting groove is provided with a chamfer; a sealing ring is fixedly connected to one side of the sealing plate located in the connecting groove, which fits with the notch of the connecting groove; the connecting groove is connected to the exhaust pipe.

[0011] Preferably, a push groove is provided on the lower mold; the push groove is connected with the connecting groove, and a rod No. 1 and a rod No. 2 are arranged in the push groove; the rod No. 1 and the rod No. 2 are slidingly connected, and a push spring is fixed between the rod No. 1 and the rod No. 2; the top end of the rod No. 1 is rotatably connected to the blocking plate; a contact rod is rotatably connected to the lower end of the push groove; one end of the contact rod is rotatably connected to the No. 2 rod, and the other end is exposed from the push groove and can contact the ejection block.

[0012] Preferably, a No. 1 one-way valve is fixedly connected and communicated in the connecting groove; a No. 2 one-way valve is fixedly connected and communicated with the top of the piston cylinder; the No. 1 one-way valve can allow air to flow from the lower mold into the piston cylinder in one direction; and the No. 2 one-way valve can discharge air from the piston cylinder to the outside in one direction.

[0013] By arranging a connecting groove and a sealing plate on the lower mold, and through the linkage of the sealing plate and the No. 1 rod, the No. 2 rod and the contact rod, when the pressing of the graphite chill is completed, the connecting groove can be sealed, the graphite chill is pushed out by the ejection block, and the sealing plate can be opened after returning to the original position to complete the automatic operation.

[0014] Beneficial effects of the present invention: 1. The present invention arranges a piston cylinder, a piston block and a connecting rod on the lower mold, and before pressing the graphite chilled iron powder, the graphite chilled iron powder is evacuated to reduce the air pressure around the graphite chilled iron powder, thereby allowing the air in the graphite chilled iron powder to precipitate, thereby reducing the air in the graphite chilled iron powder that cannot be discharged in time, thereby reducing the occurrence of pores and looseness in the graphite chilled iron.

[0015] 2. The present invention provides a No. 1 check valve and a No. 2 check valve, so that when the air in the piston cylinder is discharged, it does not pass through the connecting groove, and thus the situation that the blocking plate is pushed when the air is discharged, causing the blocking plate to squeeze the graphite chiller, will not occur; 3. The present invention sets a connecting groove and a sealing plate on the lower mold, and through the linkage of the sealing plate and the No. 1 rod, the No. 2 rod and the contact rod, when the graphite chill is pressed, the connecting groove can be sealed, the graphite chill is pushed out by the ejection block, and the sealing plate is opened after returning to the original position to complete the automatic operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the present invention; Figure 2 for Figure 1 The enlarged view of point A in the middle; Figure 3 It is a cross-sectional view of the lower mold, ejector block, piston cylinder, piston block and connecting rod of the present invention; Figure 4 for Figure 3 The enlarged view of point B in the middle; Figure 5 for Figure 3 Enlarged view of point C in the middle; Figure 6 for Figure 4 Enlarged view of point D in the middle.

[0017] In the figure: 1. frame; 11. lower mold; 12. lower pressure seat; 13. upper mold; 14. feeding pipe; 15. ejector block; 16. ejector electric push rod; 17. switching block; 18. switching motor; 21. piston cylinder; 22. piston block; 23. connecting rod; 24. exhaust pipe; 25. accommodating groove; 26. reset spring; 3. surrounding groove; 31. pushing groove; 32. pushing rod; 33. flexible sealing ring; 34. pushing plate; 35. annular groove; 36. annular block; 37. pushing electric push rod; 4. connecting groove; 41. blocking plate; 42. sealing ring; 43. No. 1 one-way valve; 44. No. 2 one-way valve; 45. ejector groove; 46. No. 1 rod; 47. No. 2 rod; 48. ejector spring; 49. contact rod. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] Embodiment transfer: refer to the specification attached Figure 1 , 2 3. A chilled iron forming device for lost foam, comprising: Frame 1, lower mold 11, lower press seat 12, upper mold 13, feed pipe 14 and ejector block 15; lower mold 11 is fixedly connected to frame 1; ejector block 15 is slidably connected in lower mold 11; ejector electric push rod 16 is fixedly connected in lower mold 11; output end of ejector electric push rod 16 is fixedly connected to ejector block 15; lower press seat 12 is slidably connected to frame 1; switch block 17 is slidably connected to lower press seat 12, electric push rod is connected between lower press seat 12 and frame 1, switch motor 18 is fixedly connected to lower press seat 12; output end of switch motor 18 is fixedly connected to screw rod matched with thread of switch block 17; upper mold 13 and feed pipe 14 are both fixedly connected to switch block 17; The lower mold 11 is provided with an exhaust mechanism; after the upper mold 13 enters the lower mold 11, the exhaust mechanism exhausts air from the lower mold 11 to reduce the air in the lower mold 11, and during the process of pressing the graphite cold iron in the lower mold 11, the air in the graphite cold iron is discharged to the outside.

[0020] In the present invention, the vacuum mechanism includes a piston cylinder 21, a piston block 22, a connecting rod 23, and an exhaust pipe 24; a receiving groove 25 is opened in the lower mold 11; the piston cylinder 21 is fixedly connected in the receiving groove 25; the piston block 22 is slidably connected in the piston cylinder 21; the connecting rod 23 is U-shaped, and one end is slidably connected to the lower mold 11, and the other end is fixedly connected to the piston block 22; a return spring 26 is fixedly connected in the receiving groove 25; the top end of the return spring 26 is fixedly connected to the connecting rod 23; one end of the exhaust pipe 24 is connected to the piston cylinder 21, and the other end is connected to the lower mold 11.

[0021] In the present invention, both the ejection block 15 and the upper mold 13 are provided with a surrounding groove 3 and a push groove 31; the push groove 31 is connected to the surrounding groove 3; a push rod 32 is slidably connected in the push groove 31; a flexible sealing ring 33 is provided in the surrounding groove 3; a push plate 34 is fixedly connected to the flexible sealing ring 33; and the push plate 34 is fixedly connected to the push rod 32.

[0022] In the present invention, an annular groove 35 is provided on the ejection block 15 and the upper mold 13; an annular block 36 is slidably connected in the annular groove 35; the end of the push rod 32 close to the annular block 36 is arranged in an oblique shape, and the end of the annular block 36 close to the push rod 32 is arranged in an oblique shape that fits the push rod 32; a push electric push rod 37 is fixedly connected in the annular groove 35; the output end of the push electric push rod 37 is fixedly connected to the push rod 32.

[0023] In the present invention, the feed pipe 14 of the present invention is connected to the storage bin for storing graphite cold iron powder raw materials, and the graphite cold iron powder is controlled by a valve to enter the feed pipe 14; first, the switching motor 18 drives the switching block 17 to move, so that the feed pipe 14 moves to the top of the lower mold 11, and then the graphite cold iron powder is introduced into the lower mold 11, and then the switching motor 18 drives the switching block 17 to move, so that the upper mold 13 on the switching block 17 is located above the lower mold 11, and then the electric push rod between the lower press seat 12 and the frame 1 drives the lower press seat 12 to move downward, so that the upper mold 13 is pressed into the lower mold 11, and the lower press seat 12 contacts the connecting rod 23, pressing downward. The connecting rod 23 drives the piston block 22 to move downward, thereby evacuating the graphite cold iron powder in the piston cylinder 21 and the lower mold 11, reducing the air pressure of the environment around the graphite cold iron powder, so that the air in the graphite cold iron powder is precipitated, and then the upper mold 13 moves downward to press the graphite cold iron powder into a block. Then the upper mold 13 moves upward, and the ejection electric push rod 16 pushes the ejection block 15 upward, so that the ejection block 15 pushes the block of graphite cold iron upward, so that the block of graphite cold iron is separated from the lower mold 11; in the process of the lower pressing seat 12 moving upward, the return spring 26 pushes the connecting rod 23 upward, so that the piston block 22 returns to its original position; In the present invention, the ejection block 15 and the upper mold 13 are provided with a surrounding groove 3 and a pushing groove 31. After the upper mold 13 enters the lower mold 11, the electric push rod 37 is pushed to push the annular block 36, so that the annular block 36 pushes the pushing rod 32 through the inclined surface, thereby making the flexible sealing block fit with the inner wall of the lower mold 11, thereby achieving a sealing effect; The present invention arranges a piston cylinder 21, a piston block 22 and a connecting rod 23 on the lower mold 11. Before pressing the graphite chilled iron powder, the graphite chilled iron powder is evacuated to reduce the air pressure around the graphite chilled iron powder, thereby allowing the air in the graphite chilled iron powder to precipitate, thereby reducing the air in the graphite chilled iron powder that cannot be discharged in time, thereby reducing the occurrence of pores and looseness in the graphite chilled iron.

[0024] Embodiment 2: Based on Embodiment 1, refer to the attached Figure 3 , 4 , 5 and 6, in the present invention, a connecting groove 4 is opened on the lower mold 11; a sealing plate 41 is rotatably connected in the connecting groove 4; the upper end of the sealing plate 41 is rotatably connected to the connecting groove 4, and the notch of the connecting groove 4 is provided with a chamfer; a sealing ring 42 is fixedly connected to one side of the sealing plate 41 located in the connecting groove 4, which fits with the notch of the connecting groove 4; the connecting groove 4 is connected to the exhaust pipe.

[0025] In the present invention, a push groove 45 is provided on the lower mold 11; the push groove 45 is connected with the connecting groove 4, and a rod 46 and a rod 47 are arranged in the push groove 45; the rod 46 and the rod 47 are slidably connected, and a push spring 48 is fixed between the rod 46 and the rod 47; the top end of the rod 46 is rotatably connected to the blocking plate 41; the lower end of the push groove 45 is rotatably connected to a contact rod 49; one end of the contact rod 49 is rotatably connected to the rod 47, and the other end is exposed from the push groove 45, and can contact the ejection block 15.

[0026] In the present invention, a No. 1 one-way valve 43 is fixedly connected and communicated in the connecting groove 4; a No. 2 one-way valve 44 is fixedly connected and communicated with the top of the piston cylinder 21; the No. 1 one-way valve 43 can allow air to flow from the lower mold 11 into the piston cylinder 21 in one direction; and the No. 2 one-way valve 44 can discharge air from the piston cylinder 21 to the outside in one direction.

[0027] In the present invention, blocking plates 41 are provided on both sides of the lower mold 11. In the initial state, the ejection block 15 presses the contact rod 49, so that the contact rod 49 lifts the No. 2 rod 47 and the No. 1 rod 46 upward, so that the No. 1 rod 46 pushes the blocking plate 41 to open the connecting groove 4. When the upper mold 13 enters the lower mold 11, the piston cylinder 21 vacuumizes the lower mold 11. When the upper mold 13 passes through the blocking plate 41, the upper mold 13 pushes the blocking plate 41, so that the blocking plate 41 pushes the No. 1 rod 46, so that the No. 1 rod 46 and the No. 2 rod 47 slide relatively, and the blocking plate 41 closes the connecting groove 4. When the upper mold 1 When the upper mold 13 moves upward, the ejection block 15 moves upward together with the upper mold 13, so that under the action of the ejection spring 48, the second rod 47 and the end of the contact rod 49 away from the ejection block 15 move downward, so that the force of the ejection spring 48 will not cause the blocking plate 41 to have a tendency to rotate outward, and then when the graphite cold iron block is separated from the lower mold 11, it will not be squeezed by the blocking plate 41. Therefore, the blocking plate 41 of the present invention can be moved into the lower mold 11 by the upper mold 13, and the connecting groove 4 is automatically blocked after the lower mold 11 is vacuumed, and then the ejection block 15 pushes the graphite cold iron back to the original position, and then the blocking plate 41 is opened; In the present invention, when the lower mold 11 is evacuated, the air in the lower mold 11 enters the piston cylinder 21 through the No. 1 one-way valve 43, and the No. 2 one-way valve 44 is closed at this time; when the lower pressure seat 12 moves upward with the upper mold 13, the connecting rod 23 pushes the piston block 22 upward under the action of the return spring 26, and the No. 1 one-way valve 43 is closed at this time, and the air in the piston cylinder 21 is discharged from the lower mold 11 through the No. 2 one-way valve 44. By providing the No. 1 one-way valve 43 and the No. 2 one-way valve 44, the air in the piston cylinder 21 is discharged not through the connecting groove 4, and thus the blocking plate 41 is not pushed when the air is discharged, so that the blocking plate 41 squeezes the graphite cold iron; The present invention provides a connecting groove 4 and a sealing plate 41 on the lower mold 11. Through the linkage of the sealing plate 41 and the No. 1 rod 46, the No. 2 rod 47 and the contact rod 49, when the graphite chill is pressed, the connecting groove 4 can be sealed, the graphite chill is pushed out by the ejection block 15, and the sealing plate 41 is opened after returning to the original position to complete the automatic operation.

[0028] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments, and the above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected; the scope of the present invention to be protected is defined by the attached claims and their equivalents.

Claims

1. A chilled iron forming equipment for lost foam, characterized in that: include: A frame (1), a lower mold (11), a lower press seat (12), an upper mold (13), a feed pipe (14) and an ejector block (15); the lower mold (11) is fixedly connected to the frame (1); the ejector block (15) is slidably connected in the lower mold (11); an ejector electric push rod (16) is fixedly connected in the lower mold (11); the output end of the ejector electric push rod (16) is fixedly connected to the ejector block (15); the lower press seat (12) Slidingly connected to the frame (1); a switching block (17) is slidably connected to the lower pressing seat (12); an electric push rod is connected between the lower pressing seat (12) and the frame (1); a switching motor (18) is fixedly connected to the lower pressing seat (12); a screw rod that is threadedly matched with the switching block (17) is fixedly connected to the output end of the switching motor (18); the upper mold (13) and the feed pipe (14) are both fixedly connected to the switching block (17); An exhaust mechanism is provided in the lower mold (11); after the upper mold (13) enters the lower mold (11), the exhaust mechanism exhausts air in the lower mold (11) to reduce the air in the lower mold (11), and during the process of pressing the graphite cold iron in the lower mold, the air in the graphite cold iron is discharged to the outside.

2. The chilled iron forming equipment for lost foam according to claim 1, characterized in that: The air extraction mechanism comprises a piston cylinder (21), a piston block (22), a connecting rod (23), and an air extraction pipeline (24); a receiving groove (25) is provided in the lower mold (11); the piston cylinder (21) is fixedly connected in the receiving groove (25); the piston block (22) is slidably connected in the piston cylinder (21); the connecting rod (23) is U-shaped, one end of which is slidably connected to the lower mold (11), and the other end of which is fixedly connected to the piston block (22); a return spring (26) is fixedly connected in the receiving groove (25); the top end of the return spring (26) is fixedly connected to the connecting rod (23); one end of the air extraction pipeline (24) is connected to the piston cylinder (21), and the other end of the air extraction pipeline (24) is connected to the lower mold (11).

3. The chilled iron forming equipment for lost foam according to claim 2, characterized in that: The ejection block (15) and the upper mold (13) are both provided with a surrounding groove (3) and a pushing groove (31); the pushing groove (31) is connected to the surrounding groove (3); a pushing rod (32) is slidably connected in the pushing groove (31); a flexible sealing ring (33) is provided in the surrounding groove (3); a pushing plate (34) is fixedly connected to the flexible sealing ring (33); and the pushing plate (34) is fixedly connected to the pushing rod (32).

4. The chilled iron forming equipment for lost foam according to claim 3, characterized in that: The ejection block (15) and the upper mold (13) are provided with an annular groove (35); an annular block (36) is slidably connected in the annular groove (35); one end of the push rod (32) close to the annular block (36) is arranged in an oblique shape, and one end of the annular block (36) close to the push rod (32) is arranged in an oblique shape that fits the push rod (32); an electric push rod (37) is fixedly connected in the annular groove (35); and the output end of the electric push rod (37) is fixedly connected to the push rod (32).

5. The chilled iron forming equipment for lost foam according to claim 4, characterized in that: The lower mold (11) is provided with a connecting groove (4); a sealing plate (41) is rotatably connected in the connecting groove (4); the upper end of the sealing plate (41) is rotatably connected to the connecting groove (4), and the notch of the connecting groove (4) is provided with a chamfer; a sealing ring (42) is fixedly connected to one side of the sealing plate (41) located in the connecting groove (4), and fits with the notch of the connecting groove (4); the connecting groove (4) is connected to the exhaust pipe.

6. The chilled iron forming equipment for lost foam according to claim 5, characterized in that: The lower mold (11) is provided with a push groove (45); the push groove (45) is connected to the connecting groove (4), and a first rod (46) and a second rod (47) are arranged in the push groove (45); the first rod (46) and the second rod (47) are slidably connected, and a push spring (48) is fixedly connected between the first rod (46) and the second rod (47); the top end of the first rod (46) is rotatably connected to the blocking plate (41); the lower end of the push groove (45) is rotatably connected to a contact rod (49); one end of the contact rod (49) is rotatably connected to the second rod (47), and the other end is exposed from the push groove (45) and can contact the ejection block (15).

7. The chilled iron forming equipment for lost foam according to claim 6, characterized in that: A first one-way valve (43) is fixedly connected and communicated with the communicating groove (4); a second one-way valve (44) is fixedly connected and communicated with the top end of the piston cylinder (21); the first one-way valve (43) can allow air to flow from the lower mold (11) into the piston cylinder (21) in one direction; and the second one-way valve (44) can discharge air from the piston cylinder (21) to the outside in one direction.

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