Sand core ejection structure of vertical sand core making machine

Abstract

The utility model relates to a sand core making machine, and discloses a sand core ejection structure of a vertical sand core making machine, which comprises an equipment frame, a first mounting part, a second mounting part, four connecting columns, a group of springs, a third mounting part and an oil cylinder. At the beginning, the upper mold is in an upper limit position, and at the moment, the first ejector rod of the third mounting part penetrates out of the upper frame body, acts on the connecting part and overcomes the spring, so that the second ejector rod of the ejection part exceeds the mold cavity of the mold part. And then, the oil cylinder enables the upper mold to move downwards, before the upper mold and the lower mold are closed, the first ejector rod is separated from the connecting part, and under the action of the spring, the second ejector rod recovers to be flush with the mold cavity of the mold part. And then, the upper mold continues to move downwards to be closed with the lower mold, a sand shooting hole is formed in the side wall of the mold, and a sand shooting cylinder shoots sand into the mold from the sand shooting hole. And finally, the oil cylinder enables the upper mold to move upwards and restore to the initial state, and the second ejector rod ejects the sand core in the mold cavity of the lower mold upwards, so that the sand core is separated from the mold cavity.

Description

Technical Field

[0001] This utility model relates to a sand core making machine, and particularly to a sand core ejection structure for a vertical sand core making machine. Background Technology

[0002] For vertical sand core making machines, the lower mold is typically a fixed concave mold, while the upper mold is moved up and down by a hydraulic cylinder. After the upper and lower molds close, a sand injection hole is formed on one or two vertical side walls, and the sand injection cylinder injects coated sand into the mold from the side. After heating to solidify the coated sand, the upper and lower molds open, leaving the coated sand in the cavity of the lower mold. To facilitate the removal of the sand core from the lower mold, the lower mold generally includes: a mold part with a cavity and an ejector part with a push rod. Correspondingly, the vertical sand core making machine is equipped with a sand core ejection structure. The mold part of the lower mold is fixedly connected to the frame of the vertical sand core making machine, and the ejector part is moved up and down by the sand core ejection structure. When the upper and lower molds are closed, the end face of the push rod is flush with and overlaps the inner bottom wall of the cavity. After the upper and lower molds open, the push rod moves upward to eject the sand core. Existing vertical sand core making machines generally use a cylinder as the sand core ejection structure to drive the ejection part to move up and down. However, they also have the following problems: the structure is relatively complex and it is inconvenient to adjust when changing the mold. Utility Model Content

[0003] This application provides a sand core ejection structure for a vertical sand core making machine, which can solve the problems mentioned in the background art.

[0004] This application provides a core ejection structure for a vertical core making machine, comprising:

[0005] The equipment frame includes: a lower frame, an upper frame, and four guide columns that are fixed between the lower frame and the upper frame;

[0006] The first mounting section is fixedly connected to the lower frame; it has a through-hole in the middle for mounting the mold part of the lower mold.

[0007] The second mounting part slides vertically through the lower frame; it has an outlet corresponding to the first mounting part; and the top is for mounting the ejector part of the lower mold.

[0008] Four connecting posts are slidably inserted into the four guide posts; the lower ends of all four are fixedly connected to the bottom of the second mounting part, and the upper ends of all four are fixedly provided with the same connecting part.

[0009] A set of springs is used to keep the second mounting part in the lower limit position;

[0010] The third mounting section is slidably connected to four guide pillars; multiple first push rods with corresponding connecting parts are fixedly mounted for the installation of the upper mold.

[0011] The hydraulic cylinder is installed on the upper frame and drives the third mounting part to slide.

[0012] In some embodiments, the first push rod can be adjusted up and down to the fixed connection position of the third mounting part.

[0013] In some embodiments, when the third mounting part is in the upper limit position, the first push rod can not exceed the upper frame by adjusting the fixed connection position of the first push rod in the third mounting part.

[0014] In some embodiments, the second mounting part includes:

[0015] The first part is used for: passing through the lower frame and for fixing the four connecting columns;

[0016] The second part is used for: installing the ejector part of the lower mold; it is fixedly connected to the top of the first part and its fixed connection position can be adjusted up and down.

[0017] In some embodiments, a screw lifting mechanism is provided between the first part and the second part.

[0018] In some embodiments, a set of springs consists of four compression springs, each sleeved onto one of the four connecting posts.

[0019] In summary, this application discloses a sand core ejection structure for a vertical sand core making machine, comprising: a frame, a first mounting part, a second mounting part, four connecting columns, a set of springs, a third mounting part, and a hydraulic cylinder. Initially, the upper mold is in its upper limit position. At this time, the first ejector rod of the third mounting part extends through the upper frame and acts on the connecting part, overcoming the springs, causing the second ejector rod of the ejection part to extend beyond the mold cavity of the mold part. Next, the hydraulic cylinder moves the upper mold downward. Before the upper and lower molds close, the first ejector rod separates from the connecting part. Under the action of the springs, the second ejector rod returns to being flush with the mold cavity of the mold part. Then, the upper mold continues to move downward until it closes with the lower mold, forming a sand injection hole on the side wall of the mold. The sand injection cylinder injects sand into the mold through the sand injection hole. Finally, the hydraulic cylinder moves the upper mold upward, returning it to its initial state. The second ejector rod pushes the sand core in the mold cavity of the lower mold upward, separating the sand core from the mold cavity. The advantages are: a simpler structure and easier adjustment and adaptation to different molds. Attached Figure Description

[0020] To better illustrate the technical solutions in the embodiments of this application or the background art, the accompanying drawings used in the embodiments of this application or the background art will be described below.

[0021] Figure 1 This is a schematic diagram of the present application;

[0022] Figure 2 This is a cross-sectional view of this application;

[0023] Figure 3 A cross-sectional view of this application in another state;

[0024] Figure 4 for Figure 3 An enlarged schematic diagram of part A in the middle;

[0025] Figure 5 Schematic diagrams of some other embodiments of the first push rod and the third mounting part;

[0026] Figure 6 In order to be in Figure 5 Set the sectional view after adjusting the first push rod;

[0027] Figure 7 for Figure 6 Enlarged schematic diagram of part B.

[0028] In the picture,

[0029] 1. Equipment frame; 11. Lower frame; 12. Upper frame; 13. Guide column;

[0030] 2. First installation section; 2a. Exit point;

[0031] 3. Second mounting section; 31. First part; 32. Second part; 3a. Screw lifting mechanism; 3a1. Screw;

[0032] 4. Connecting column; 4a. Connecting part;

[0033] 5. Spring;

[0034] 6. Third mounting part; 6a. First push rod; 6b. Nut;

[0035] 7. Hydraulic cylinder;

[0036] 8. Place the mold;

[0037] 9. Lower mold; 91. Mold part; 92. Ejector part; 92a. Second ejector pin. Specific Implementation

[0038] The following description is provided in conjunction with the accompanying drawings, which are for illustrative purposes only and not strictly to scale. Unless otherwise defined, the technical or scientific terms used in this disclosure should be understood in their ordinary sense by one of ordinary skill in the art to which this disclosure pertains. The terms "first," "second," and similar terms used in this disclosure do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships, and these relative positional relationships may change accordingly when the absolute position of the described object changes. Unless otherwise specified, the embodiments in this application can be combined with each other.

[0039] Please see Figure 1 , Figure 2 , Figure 3 and Figure 4 A sand core ejection structure for a vertical sand core making machine includes: an equipment frame 1, a first mounting part 2, a second mounting part 3, four connecting columns 4, a set of springs 5, a third mounting part 6, and a hydraulic cylinder 7.

[0040] The equipment frame 1 is the equipment frame 1 of the vertical sand core making machine, including: lower frame 11, upper frame 12, and four guide columns 13. The four guide columns 13 are fixed between the lower frame 11 and the upper frame 12.

[0041] The first mounting part 2 is fixedly connected to the lower frame 11. The first mounting part 2 has a through-hole 2a at the middle position.

[0042] Please see Figure 1 and Figure 4 The lower mold 9 includes a mold part 91 and an ejector part 92. The first mounting part 2 is used to mount the mold part 91 of the lower mold 9. The outlet 2a of the first mounting part 2 is used for the ejector part 92 to pass through when it moves up and down.

[0043] The second mounting part 3 is slidably connected to the lower frame 11. The second mounting part 3 is also inserted through the lower frame 11, that is, the top of the second mounting part 3 extends upward from the lower frame 11. By sliding up and down, the top of the second mounting part 3 can be adjusted in position while maintaining its upward extension through the lower frame 11.

[0044] The second mounting part 3 also corresponds to the through-hole 2a of the first mounting part 2. The top of the second mounting part 3 is for mounting the ejector part 92 of the lower mold 9, that is, the top of the second mounting part 3 can also pass through the through-hole 2a of the first mounting part 2.

[0045] Please see Figure 2 and Figure 3 The four connecting columns 4 are slidably connected to the four guide columns 13 respectively. The four connecting columns 4 are also respectively inserted through the four guide columns 13. That is, the guide columns 13 are hollow. The connecting columns 4 pass through the guide columns 13, and the upper end of the connecting columns 4 passes through the guide columns 13 and enters the lower frame 11. The upper end passes through the guide columns 13 and the upper frame 12.

[0046] The lower ends of the four connecting posts 4 are all fixedly connected to the bottom of the second mounting part 3, that is, the above can be accomplished by the four connecting posts 4: the second mounting part 3 is slidably connected to the lower frame 11. The upper ends of the four connecting posts 4 are all fixedly provided with the same connecting part 4a.

[0047] A set of springs 5 ​​is used to keep the second mounting part 3 in the lower limit position. The lower limit position can be determined by the connecting part 4a pressing downward against the upper frame 12. The springs 5 ​​can be arranged as follows: the set of springs 5 ​​consists of four compression springs 5, which are respectively sleeved on the four connecting posts 4.

[0048] When the second mounting part 3 remains in the lower limit position, the second ejector rod 92a of the ejector part 92 of the lower mold 9 is retracted and flush with the mold cavity of the mold part 91.

[0049] The third mounting section 6 is slidably connected to four guide pillars 13. Multiple first push rods 6a are fixed to the third mounting section 6 at positions corresponding to the connecting section 4a. Correspondingly, the upper frame 12 has through holes for the first push rods 6a to pass through. The third mounting section 6 also provides mounting space for the upper mold 8.

[0050] The hydraulic cylinder 7 is mounted on the upper frame 12, and also drives the third mounting part 6 to slide. That is, the cylinder body of the hydraulic cylinder 7 is fixedly connected to the upper frame 12, and the piston rod of the hydraulic cylinder 7 extends downward through the upper frame 12 and is fixedly connected to the third mounting part 6. Accordingly, the connecting part 4a can be rectangular, so as not to interfere with the installation of the hydraulic cylinder 7 and the upper frame 12.

[0051] The upper mold 8 and lower mold 9 are closed / opened by the hydraulic cylinder 7. The hydraulic cylinder 7, as the actuator, is equipped with corresponding hydraulic circuits, sensors, directional valves, etc. to control the extension, retraction, and stopping of the hydraulic cylinder 7.

[0052] Initially, the upper mold 8 is in the upper limit position. At this time, the first ejector rod 6a of the third mounting part 6 passes through the upper frame 12 and acts on the connecting part 4a, overcoming the spring 5, so that the connecting part 4a, the four connecting pillars 4, the second mounting part 3, and the ejector part 92 of the lower mold 9 move upward together. Correspondingly, the second ejector rod 92a of the ejector part 92 extends beyond the mold cavity of the mold part 91.

[0053] Next, the hydraulic cylinder 7 moves the upper mold 8 down. Before the upper mold 8 and the lower mold 9 close, the first ejector rod 6a and the connecting part 4a separate. Under the action of the spring 5, the connecting part 4a, the four connecting pillars 4, the second mounting part 3, and the ejector part 92 of the lower mold 9 move down together. The second mounting part 3 returns to the lower limit position, and the second ejector rod 92a returns to be flush with the mold cavity of the mold part 91.

[0054] Then, the upper mold 8 continues to move down until it closes with the lower mold 9, forming a sand-shooting hole on the side wall of the mold, and the sand-shooting cylinder shoots sand into the mold through the sand-shooting hole.

[0055] Finally, the hydraulic cylinder 7 moves the upper mold 8 upward, restoring it to its initial state. The second ejector rod 92a pushes the sand core in the lower mold 9 cavity upward, separating the sand core from the mold cavity.

[0056] Please see Figure 5 In some embodiments, the first push rod 6a can be adjusted up and down to the fixed connection position of the third mounting part 6. More specifically, the first push rod 6a can be a threaded rod, and the third mounting part 6 is fixed with a matching nut 6b.

[0057] By adjusting the fixed connection position of the first ejector rod 6a in the third mounting part 6, the length of the second ejector rod 92a of the ejector part 92 extending beyond the mold cavity can be adjusted, thereby adjusting the ejection degree of the sand core to suit different sand cores.

[0058] Please see Figure 6 and Figure 7 In some embodiments, by adjusting the fixed connection position of the first push rod 6a in the third mounting part 6, the first push rod 6a can be kept within the upper frame 12.

[0059] Adjusting the fixed connection position of the first ejector rod 6a in the third mounting part 6, initially (i.e., when the third mounting part 6 is in the upper limit position), ensures that the first ejector rod 6a does not exceed the upper frame 12. Correspondingly, the connecting part 4a, the four connecting pillars 4, the second mounting part 3, and the ejector part 92 of the lower mold 9 remain stationary. The second ejector rod 92a of the ejector part 92 remains flush with the mold cavity of the mold part 91. The second ejector rod 92a can be observed and adjusted to ensure its flushness with the mold cavity.

[0060] Please see Figure 6 and Figure 7 In some embodiments, the second mounting part 3 includes a first part 31 and a second part 32. The first part 31 is used to pass through the lower frame 11 and to be fixedly connected to the four connecting columns 4. The second part 32 is used to install the ejector part 92 of the lower mold 9. The second part 32 is fixedly connected to the top of the first part 31 and can also be adjusted vertically to fix the connection position.

[0061] Adjust the fixed connection position of the first ejector rod 6a in the third mounting part 6. Initially, ensure that the first ejector rod 6a does not exceed the upper frame 12. Keep the second ejector rod 92a of the ejector part 92 flush with the mold cavity of the mold part 91. Adjust the second ejector rod 92a by adjusting the fixed connection position of the second part 32 in the first part 31 to ensure the flushness with the mold cavity.

[0062] Please see Figure 7 In some embodiments, a screw lifting mechanism 3a is provided between the first part 31 and the second part 32. That is, the screw lifting mechanism 3a is used to adjust the fixed connection position of the second part 32 to the first part 31. More specifically, the screw lifting mechanism 3a can be a fixed screw 3a1, meaning the screw 3a1 is fixedly connected to the second part 32, the outer casing of the screw lifting mechanism 3a is fixedly connected to the bottom of the first part 31, and a screw nut matching the screw 3a1 is rotatably connected to the outer casing. A hand crank, serving as an input, is also rotatably connected to the outer casing, and a worm gear reduction transmission is provided between the hand crank and the screw nut.

Claims

1. A sand core ejection structure for a vertical sand core making machine, characterized in that, include: The equipment frame (1) includes: a lower frame (11), an upper frame (12), and four guide columns (13) fixed between the lower frame (11) and the upper frame (12); The first mounting part (2) is fixedly connected to the lower frame (11); it has a through-hole (2a) in the middle position for mounting the mold part (91) of the lower mold (9); The second mounting part (3) is slidably installed in the lower frame (11); it corresponds to the outlet (2a) of the first mounting part (2); the top is for the ejector part (92) of the lower mold (9) to be installed; Four connecting posts (4) are slidably inserted into four guide posts (13) respectively; the lower ends are all fixedly connected to the bottom of the second mounting part (3), and the upper ends are all fixedly provided with the same connecting part (4a); A set of springs (5) is used to keep the second mounting part (3) in the lower limit position; The third mounting part (6) is slidably connected to four guide pillars (13); multiple first push rods (6a) with corresponding connecting parts (4a) are fixedly mounted for the upper mold (8) to be installed; The hydraulic cylinder (7) is installed on the upper frame (12); it drives the third mounting part (6) to slide.

2. The core ejection structure of a vertical core making machine according to claim 1, characterized in that, The first push rod (6a) can be adjusted up and down to the fixed connection position of the third mounting part (6).

3. The core ejection structure of a vertical core making machine according to claim 2, characterized in that, When the third mounting part (6) is in the upper limit position, by adjusting the fixed connection position of the first push rod (6a) in the third mounting part (6), the first push rod (6a) can not exceed the upper frame (12).

4. The core ejection structure of a vertical core making machine according to claim 3, characterized in that, The second installation unit (3) includes: The first part (31) is used for: passing through the lower frame (11) and for fixing the four connecting columns (4); The second part (32) is used for: installing the ejector part (92) of the lower mold (9); and is fixedly connected to the top of the first part (31), and the fixed connection position can be adjusted up and down.

5. The core ejection structure of a vertical sand core making machine according to claim 2, characterized in that, A screw lifting mechanism (3a) is provided between the first part (31) and the second part (32).

6. The core ejection structure of a vertical sand core making machine according to claim 1, characterized in that, A set of springs (5) consists of four compression springs (5), which are respectively sleeved on four connecting posts (4).

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