CN213033576U - Core box convenient for mold closing and opening - Google Patents
Core box convenient for mold closing and opening Download PDFInfo
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- CN213033576U CN213033576U CN202021787747.3U CN202021787747U CN213033576U CN 213033576 U CN213033576 U CN 213033576U CN 202021787747 U CN202021787747 U CN 202021787747U CN 213033576 U CN213033576 U CN 213033576U
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Abstract
The application relates to a core box convenient for closing and opening a mold, which relates to the technical field of core making of nodular cast iron pipes, and comprises a base, a lower mold, an outer mold, a core mold and an upper mold, wherein the lower mold is fixedly connected on the base, the outer mold comprises a first half mold and a second half mold, the first half mold and the second half mold are connected with the base in a sliding mode along the direction perpendicular to the axis of the lower mold, the core mold is coaxially arranged in the outer mold, the core mold is connected with the lower mold in a sliding mode along the axis of the lower mold, an upper mold cover is arranged on the outer mold, when the upper mold cover is arranged on the outer mold, the top end face of the core mold is abutted against the bottom end face of the upper mold. When the mold is opened, the upper mold, the core mold and the outer mold are sequentially moved, the core mold does not need to be moved in the mold opening process, the probability of damage of the core mold is reduced, the precision of the core mold is improved, and the precision of the female end of the nodular cast iron pipe is further improved.
Description
Technical Field
The application relates to the technical field of core making of ductile cast iron pipes, in particular to a core box convenient for die assembly and die sinking.
Background
In order to form the internal shape of the female end of the nodular cast iron pipe, a sand core needs to be placed inside the female end of the pipe die, one sand core needs to be consumed when one nodular cast iron pipe is poured, and the female end of the nodular cast iron pipe is formed between the internal cavity of the female end of the pipe die and the outside of the sand core.
The core box is mainly manufactured by a core making machine and a core box, and a cavity with the same shape as the core is arranged in the core box.
SUMMERY OF THE UTILITY MODEL
In order to reduce the destroyed probability of psammitolite when the mould opening, this application provides a core box convenient to compound die mould.
The application provides a core box convenient to compound die and die sinking adopts following technical scheme:
a core box convenient for closing and opening a mold comprises a base, a lower mold, an outer mold, a core mold and an upper mold, wherein the lower mold is fixedly connected to the base, the outer mold comprises a first half mold and a second half mold, the first half mold and the second half mold are arranged along the axis of the lower mold in a centrosymmetric manner, the first half mold and the second half mold are connected with the base in a sliding manner along the direction perpendicular to the axis of the lower mold, the inner peripheral surfaces of the first half mold and the second half mold are abutted to the outer peripheral surface of the lower mold, the core mold is coaxially arranged in the outer mold, the bottom end surface of the core mold is also abutted to the top end surface of the lower mold, the upper mold is covered on the outer mold, when the upper mold is covered on the outer mold, the top end surface of the core mold is abutted to the bottom end surface of the upper mold, and a cavity is formed between the lower mold, and a sand blasting hole is formed in the upper die, and one end of the sand blasting hole is communicated with the cavity.
By adopting the technical scheme, when the mold is closed, the first half mold and the second half mold are relatively slid to be mutually abutted, the first half mold and the second half mold are both abutted with the lower mold, then the upper mold and the core mold are downwardly slid along the axis of the lower mold until the bottom end surface of the core mold is abutted with the top end surface of the lower mold, and at the moment, the bottom end surface of the upper mold close to the cavity is abutted with the top end surface of the outer mold; and then, core sand can be sprayed into the cavity through the sand blasting holes, after the core sand forms a sand core, the upper die and the core die are moved to open the die, the sand core and the outer die are kept still, the core die is drawn out of the sand core, then the first half die and the second half die slide in a reverse direction, the sand core and the outer die can be opened at the time, the sand core does not need to be moved in the die opening process, the probability of damage of the sand core is reduced, the precision of the sand core is improved, and further the precision of the female end of the nodular cast iron pipe is improved.
The present application may be further configured in a preferred example to: the core mold is fixedly connected with the upper mold.
By adopting the technical scheme, when the mold is opened, the upper mold and the core mold can be moved simultaneously by moving the upper mold upwards along the axial direction of the lower mold, so that the steps required during mold opening are reduced, and the mold opening efficiency is improved; and the upper die and the core die are relatively fixed, so that the upper die and the core die are not easy to relatively move when the upper die is moved, the probability that the core die damages the sand core when the die is opened is further reduced, and the precision of the sand core is improved.
The present application may be further configured in a preferred example to: the lower die is provided with a positioning hole along the axis of the lower die, the bottom end face of the core die is fixedly connected with a positioning shaft, the positioning shaft and the core die are coaxially arranged, when the bottom end face of the core die abuts against the top end face of the lower die, the positioning shaft penetrates through the positioning hole, and the outer peripheral face of the positioning shaft abuts against the inner peripheral face of the positioning hole.
By adopting the technical scheme, when the mold is closed, the upper mold and the core mold slide downwards along the axis of the lower mold, when the bottom end surface of the core mold is about to abut against the top end surface of the lower mold, the positioning shaft is inserted into the positioning hole, and at the moment, the lower mold limits the core mold and the upper mold, so that the coaxiality between the lower mold and the core mold is improved, the wall thickness of the sand core in the circumferential direction of the sand core is more uniform, and the precision of the sand core is improved; and when the mold is opened, the core shaft is not easy to collide with the sand core under the guidance of the positioning shaft, so that the precision of the sand core is improved.
The present application may be further configured in a preferred example to: and a chamfer is formed at one end of the outer peripheral surface of the positioning shaft, which is far away from the core mold.
By adopting the technical scheme, when the die is closed, the positioning shaft is easier to insert into the positioning hole under the guidance of the chamfer, so that the die closing efficiency of the core die and the lower die is improved.
The present application may be further configured in a preferred example to: and the upper end surface of the outer die is fixedly connected with a flange, and when the bottom end surface of the core die is abutted against the top end surface of the lower die, the bottom end surface of the upper die is abutted against the upper end surface of the flange.
By adopting the technical scheme, the upper die and the outer die are attached more tightly, and after sand blasting is finished in the cavity, triethylamine steam is filled into the cavity to enable the sand core to form strength, so that the triethylamine steam is not easy to leak into the atmosphere from the space between the upper die and the outer die, and the safety of the sand core during forming the strength is improved; meanwhile, the sand core can fully react with triethylamine, the strength of the sand core is improved, and the probability of damage of the sand core during mold opening is reduced.
The present application may be further configured in a preferred example to: the top end face of the base is fixedly connected with a sliding rail, the bottom end faces of the first half die and the second half die are fixedly connected with sliding blocks, the sliding blocks are clamped on the sliding rail, and the sliding blocks are connected with the sliding rail in a sliding mode.
By adopting the technical scheme, the first half die and the second half die slide relative to the base through the slide block and the slide rail, so that the friction force between the first half die, the second half die and the base is reduced, the sliding stability of the first half die and the second half die is improved, the probability of sand core damage caused by the shaking of the first half die and the second half die is reduced when the first half die and the second half die slide back to back, and the precision of the sand core is improved.
The present application may be further configured in a preferred example to: the sliding rails are uniformly arranged in a plurality of positions along the sliding direction perpendicular to the first half die, the sliding blocks on the first half die and the second half die are also arranged in a plurality of positions, the sliding blocks on the first half die correspond to the sliding rails one by one, and the sliding blocks on the second half die correspond to the sliding rails one by one.
By adopting the technical scheme, the first half die, the second half die and the base are stably supported, and when the first half die and the second half die slide back to back, the first half die and the second half die are not easy to generate tremble phenomenon, so that the probability of sand core damage caused by tremble of the first half die and the second half die is reduced, and the precision of the sand core is improved.
The present application may be further configured in a preferred example to: the first half die is fixedly connected with a positioning pin, the axial direction of the positioning pin is parallel to the sliding direction of the first half die, the second half die is provided with a positioning pin hole matched with the positioning pin, and the positioning pin is inserted into the positioning pin hole when the first half die and the second half die are abutted against the lower die.
By adopting the technical scheme, when the mold closing and opening are carried out, the first half mold and the second half mold are not easy to generate dislocation perpendicular to the sliding direction of the first half mold under the limitation of the positioning pin and the positioning pin hole, so that the mold closing of the first half mold, the second half mold and the lower mold is accurate, and the manufacturing accuracy of the sand core is improved; meanwhile, the first half die and the second half die are not easy to collide with the sand core when the die is opened, so that the precision of the sand core is improved.
In summary, the present application includes at least one of the following beneficial technical effects:
1. the upper die is arranged to be connected with the outer die in a sliding mode, the core die is connected with the lower die in a sliding mode along the axis of the lower die, the upper die, the core die and the outer die are sequentially moved when the die is opened, the sand core does not need to be moved in the die opening process, the probability of damage of the sand core is reduced, the precision of the sand core is improved, and the precision of the socket end of the nodular cast iron pipe is further improved.
2. The core mould is fixedly connected to the upper mould, and when the mould is opened, the upper mould and the core mould can be moved simultaneously by moving the upper mould upwards along the axial direction of the lower mould, so that steps required during mould opening are reduced, and the mould opening efficiency is improved; and the upper die and the core die are relatively fixed, so that the upper die and the core die are not easy to relatively move when the upper die is moved, the probability that the core die damages the sand core when the die is opened is further reduced, and the precision of the sand core is improved.
3. Through the arrangement of the positioning shaft and the positioning hole, when the mold is closed, the upper mold and the core mold slide downwards along the axis of the lower mold, when the bottom end surface of the core mold is about to abut against the top end surface of the lower mold, the positioning shaft is inserted into the positioning hole, and at the moment, the lower mold limits the core mold and the upper mold, so that the coaxiality between the lower mold and the core mold is improved, the wall thickness of the sand core in the circumferential direction of the sand core is more uniform, and the precision of the sand core is improved; and when the mold is opened, the core shaft is not easy to collide with the sand core under the guidance of the positioning shaft, so that the precision of the sand core is improved.
4. Through the arrangement of the slide rail and the slide block, the first half die and the second half die slide relative to the base through the slide block and the slide rail, so that the friction force between the first half die, the second half die and the base is reduced, the stability of the first half die and the second half die during sliding is improved, further, when the first half die and the second half die slide back to back, the probability of damage of the sand core caused by shaking of the first half die and the second half die is reduced, and the precision of the sand core is improved.
Drawings
FIG. 1 is a schematic overall structure diagram of an embodiment of the present application;
fig. 2 is a schematic view showing the entire structure of the core mold when it is opened in the embodiment of the present application;
fig. 3 is a schematic view showing an overall structure of the core mold and the upper mold in the embodiment of the present application.
Reference numerals: 1. a base; 11. a slide rail; 2. a lower die; 21. positioning holes; 3. an outer mold; 31. a first mold half; 311. positioning pins; 32. a second mold half; 321. a positioning pin hole; 33. a slider; 34. a flange; 4. a core mold; 41. positioning the shaft; 5. an upper die; 51. sand blasting holes; 6. a mold cavity.
Detailed Description
The present application is described in further detail below with reference to figures 1-3.
The embodiment of the application discloses a core box convenient to compound die and die sinking. Referring to fig. 1 and 2, the core box convenient for closing and opening the mold comprises a base 1, a lower mold 2, an outer mold 3, a core mold 4 and an upper mold 5, wherein the lower mold 2 is arranged in a circular ring shape, and the lower mold 2 is fixedly connected to the top end surface of the base 1 through a countersunk bolt. The outer die 3 comprises a first half die 31 and a second half die 32, the first half die 31 and the second half die 32 are arranged in central symmetry along the axis of the lower die 2, and the first half die 31 and the second half die 32 are connected with the base 1 in a sliding manner along a direction perpendicular to the axis of the lower die 2; when the first and second mold halves 31, 32 are slid relative to each other until they are in contact with each other, the inner peripheral surfaces of the first and second mold halves 31, 32 are in contact with the outer peripheral surface of the lower mold 2.
Referring to fig. 1 and 2, the core mold 4 is a circular truncated cone, the core mold 4 is coaxially disposed in the outer mold 3, the core mold 4 is further fixedly connected to an upper mold 5 by a countersunk head bolt, and the upper mold 5 is covered on the outer mold 3. A flange 34 is turned on the upper end surface of the outer die 3, and when the upper die 5 is covered on the flange 34 of the outer die 3, the bottom end surface of the core die 4 is abutted against the top end surface of the lower die 2; when the mold is opened, the upper mold 5 and the core mold 4 slide relative to the outer mold 3 along the axial direction of the lower mold 2. A cavity 6 is formed among the lower die 2, the outer die 3, the core die 4 and the upper die 5.
Referring to fig. 2 and 3, since the lower die 2 is annular, the positioning hole 21 is formed on the lower die 2 along the axis thereof, the positioning shaft 41 is integrally formed on the bottom end surface of the core die 4, the positioning shaft 41 is coaxially arranged with the core die 4, and the outer diameter of the positioning shaft 41 is the same as the inner diameter of the core die 4; the positioning shaft 41 has a chamfer on its outer peripheral surface at an end remote from the core mold 4. When the mold is closed, the positioning shaft 41 is inserted into the positioning hole 21 under the guidance of the chamfer, and the positioning shaft 41 is fully inserted into the positioning hole 21 to give importance to the bottom end surface of the core mold 4 to be in contact with the top end surface of the lower mold 2.
Referring to fig. 1 and 2, the base 1 is fixedly connected with or provided with a slide rail 11 parallel to the sliding direction of the first half die 31 through bolts, and the bottom end surfaces of the first half die 31 and the second half die 32 are fixedly connected with or welded with slide blocks 33 through countersunk bolts; a plurality of slide rails 11 are uniformly arranged along the sliding direction vertical to the first half die 31, a plurality of slide blocks 33 are arranged on the first half die 31 and the second half die 32, the slide blocks 33 on the first half die 31 correspond to the slide rails 11 one by one, and the slide blocks 33 on the second half die 32 correspond to the slide rails 11 one by one; the sliding block 33 is connected on the sliding rail 11 in a sliding manner, and the shape of the sliding block 33 is matched with that of the sliding rail 11. Therefore, when the first half die 31 and the second half die 32 slide relative to the base 1, the first half die 31 and the second half die 32 are not easy to generate tremble phenomenon, so that the probability of sand core damage caused by tremble of the first half die 31 and the second half die 32 is reduced, and the precision of the sand core is improved.
Referring to fig. 1 and 2, the first mold half 31 is further integrally formed with a positioning pin 311, an axial direction of the positioning pin 311 is parallel to a sliding direction of the first mold half 31, and the positioning pin 311 is disposed on a surface of the first mold half 31 abutting against the second mold half 32; the second half die 32 is provided with a positioning pin hole 321 adapted to the positioning pin 311, and when the first half die 31 and the second half die 32 are both abutted to the lower die 2, the positioning pin 311 is inserted into the positioning pin hole 321. When the mold is closed and opened, the first half mold 31 and the second half mold 32 are not easy to generate dislocation perpendicular to the sliding direction of the first half mold 31 under the limitation of the positioning pin 311 and the positioning pin hole 321, so that the mold closing of the first half mold 31, the second half mold 32 and the lower mold 2 is accurate, and the precision of sand core manufacturing is improved; meanwhile, the first half die 31 and the second half die 32 are not easy to collide with the sand core when the die is opened, so that the precision of the sand core is improved. To facilitate inserting the positioning pins 311 into the positioning pin holes 321, the ends of the positioning pins 311 away from the first half die 31 are chamfered.
The core box convenient for closing and opening the mold in the embodiment is implemented according to the following principle:
when the mold clamping is performed, the first half mold 31 and the second half mold 32 are slid relative to each other, until the first half mold 31 and the second half mold 32 abut against each other under the guide of the positioning pin 311 and the positioning pin hole 321, and when the first half mold 31 and the second half mold 32 abut against each other, the inner peripheral surfaces of the first half mold 31 and the second half mold 32 abut against the outer peripheral surface of the lower mold 2, so that the first half mold 31 and the second half mold 32 are accurately clamped, the core mold 4 and the upper mold 5 are slid in the axial direction of the lower mold 2, until the bottom end surface of the core mold 4 abuts against the top end surface of the lower mold 2 under the guide of the positioning shaft 41 and the positioning hole 21, and at this time, the bottom end surface of the upper mold 5 abuts against the flange 34 on the outer mold 3, so that the core mold 4 and the upper mold 5 are accurately clamped, and. After the sand core is formed in strength, the core mold 4 and the upper mold 5 are moved along the axial direction of the lower mold 2, then the first half mold 31 and the second half mold 32 are moved along the length direction of the slide rail 11, under the guidance of the positioning pin 311, the first half mold 31 and the second half mold 32 are not easy to be staggered in the direction perpendicular to the sliding direction of the first half mold 31, and the probability that the first half mold 31 and the second half mold 32 collide with the sand core is reduced; and the sand core does not need to be moved in the die opening process, so that the damage probability of the sand core is reduced, the precision of the sand core is improved, and the precision of the female end of the nodular cast iron pipe is further improved.
The embodiments of the present invention are preferred embodiments of the present application, and the scope of protection of the present application is not limited by the embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.
Claims (8)
1. A core box convenient for closing and opening a mold is characterized by comprising a base (1), a lower mold (2), an outer mold (3), a core mold (4) and an upper mold (5), wherein the lower mold (2) is fixedly connected to the base (1), the outer mold (3) comprises a first half mold (31) and a second half mold (32), the first half mold (31) and the second half mold (32) are arranged in central symmetry along the axis of the lower mold (2), the first half mold (31) and the second half mold (32) are connected with the base (1) in a sliding manner along the direction perpendicular to the axis of the lower mold (2), the inner circumferential surfaces of the first half mold (31) and the second half mold (32) are abutted to the outer circumferential surface of the lower mold (2), the core mold (4) is coaxially arranged in the outer mold (3), the bottom end surface of the core mold (4) is also abutted to the top end surface of the lower mold (2), the upper die (5) is arranged on the outer die (3) in a covering mode, the top end face of the core die (4) is abutted to the bottom end face of the upper die (5), a cavity (6) is formed among the lower die (2), the outer die (3), the core die (4) and the upper die (5), a sand blasting hole (51) is formed in the upper die (5), and one end of the sand blasting hole (51) is communicated with the cavity (6).
2. A core box convenient for closing and opening molds according to claim 1, wherein: the core mold (4) is fixedly connected with the upper mold (5).
3. A core box convenient for closing and opening molds according to claim 1, wherein: the lower die (2) is provided with a positioning hole (21) along the axis of the lower die, the bottom end surface of the core die (4) is fixedly connected with a positioning shaft (41), the positioning shaft (41) and the core die (4) are coaxially arranged, when the bottom end surface of the core die (4) is abutted against the top end surface of the lower die (2), the positioning shaft (41) penetrates through the positioning hole (21), and the outer peripheral surface of the positioning shaft (41) is abutted against the inner peripheral surface of the positioning hole (21).
4. A core box for facilitating opening and closing of molds according to claim 3, wherein: and a chamfer is formed at one end of the outer peripheral surface of the positioning shaft (41) far away from the core mold (4).
5. A core box convenient for closing and opening molds according to any one of claims 1 to 4, characterized in that: a flange (34) is fixedly connected to the upper end face of the outer die (3), and when the bottom end face of the core die (4) abuts against the top end face of the lower die (2), the bottom end face of the upper die (5) abuts against the upper end face of the flange (34).
6. A core box for facilitating opening and closing of molds according to claim 5, wherein: the die comprises a base (1) and is characterized in that a sliding rail (11) is fixedly connected to the top end face of the base (1), a sliding block (33) is fixedly connected to the bottom end face of a first half die (31) and the bottom end face of a second half die (32), the sliding block (33) is clamped on the sliding rail (11), and the sliding block (33) is connected with the sliding rail (11) in a sliding mode.
7. A core box for facilitating opening and closing of molds according to claim 6, wherein: the sliding rails (11) are uniformly arranged in a plurality of positions perpendicular to the sliding direction of the first half die (31), the sliding blocks (33) on the first half die (31) and the second half die (32) are also arranged in a plurality of positions, the sliding blocks (33) on the first half die (31) correspond to the sliding rails (11) in a one-to-one mode, and the sliding blocks (33) on the second half die (32) correspond to the sliding rails (11) in a one-to-one mode.
8. A core box for facilitating opening and closing of molds according to claim 7, wherein: the first half die (31) is further fixedly connected with a positioning pin (311), the axial direction of the positioning pin (311) is parallel to the sliding direction of the first half die (31), the second half die (32) is provided with a positioning pin hole (321) matched with the positioning pin (311), and when the first half die (31) and the second half die (32) are abutted to the lower die (2), the positioning pin (311) is inserted into the positioning pin hole (321).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021787747.3U CN213033576U (en) | 2020-08-24 | 2020-08-24 | Core box convenient for mold closing and opening |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021787747.3U CN213033576U (en) | 2020-08-24 | 2020-08-24 | Core box convenient for mold closing and opening |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213033576U true CN213033576U (en) | 2021-04-23 |
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ID=75532454
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021787747.3U Active CN213033576U (en) | 2020-08-24 | 2020-08-24 | Core box convenient for mold closing and opening |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213033576U (en) |
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2020
- 2020-08-24 CN CN202021787747.3U patent/CN213033576U/en active Active
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