CN111922297A - Die opening method of core shooting machine - Google Patents
Die opening method of core shooting machine Download PDFInfo
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- CN111922297A CN111922297A CN202010854050.1A CN202010854050A CN111922297A CN 111922297 A CN111922297 A CN 111922297A CN 202010854050 A CN202010854050 A CN 202010854050A CN 111922297 A CN111922297 A CN 111922297A
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- core
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C15/00—Moulding machines characterised by the compacting mechanism; Accessories therefor
- B22C15/23—Compacting by gas pressure or vacuum
- B22C15/24—Compacting by gas pressure or vacuum involving blowing devices in which the mould material is supplied in the form of loose particles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C13/00—Moulding machines for making moulds or cores of particular shapes
- B22C13/12—Moulding machines for making moulds or cores of particular shapes for cores
Abstract
The application relates to a die opening method of a core shooter, relating to the technical field of core making of nodular cast iron pipes, and comprising S1: closing the mold; s2: molding; s3: opening the mold; wherein S3 further comprises S3-1: opening the outer mold with the loose core and S3-2; s3-1: pulling core, removing the upper die and extracting the core die from the sand core along the axial direction of the lower die; s3-2: and opening the external mold, and separating the external mold from the sand core. According to the method, after the core sand generates strength and forms the sand core, the upper die is moved away firstly, the core die is drawn out from the sand core along the axial direction of the lower die, the peripheral surface of the sand core is still protected by the outer die, the sand core is not easy to damage when the core die is drawn out from the sand core, then the outer 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.
Description
Technical Field
The application relates to the technical field of core making of ductile cast iron pipes, in particular to a die opening method of a core shooter.
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.
Most of sand cores are manufactured through a core making machine and a core box, the core box mostly comprises a lower die, an upper die, an outer die and a core die, and the prior core making and opening method mostly comprises the following steps:
s1: assembling the die, namely splicing the lower die, the upper die, the outer die and the core die together, and forming a cavity among the lower die, the upper die, the outer die and the core die;
s2: molding, namely injecting core sand into a cavity, introducing triethylamine gas into the cavity, and polymerizing the core sand into the sand core under the catalysis of the triethylamine gas to form the sand core;
s3: opening the mold, opening the outer mold and the upper mold, and separating the upper mold, the outer mold and the sand core;
s4: and (4) ejecting the formed sand core, and further separating the sand core from the core mould.
The inventors believe that, at step S4: in the material ejecting process, an external force needs to be applied to the bottom end of the sand core, so that the sand core is easy to damage under the action of the external force, the precision of the sand core is low, the precision of the socket end of the nodular cast iron pipe is further influenced, and even the sand core can be completely broken if the external force applied to the sand core is uneven.
Disclosure of Invention
In order to reduce the probability of sand core breakage, the application provides a die opening method of a core shooter.
The mold opening method of the core shooting machine comprises the following steps:
s1: assembling the die, namely splicing the lower die, the upper die, the outer die and the core die together, and forming a cavity among the lower die, the upper die, the outer die and the core die;
s2: molding, namely injecting core sand into a cavity, introducing triethylamine gas into the cavity, and polymerizing the core sand into the sand core under the catalysis of the triethylamine gas to form the sand core;
s3: opening the mold, and opening the upper mold, the core mold and the outer mold;
wherein S3 further comprises S3-1: opening the outer mold with the loose core and S3-2;
s3-1: pulling core, removing the upper die and extracting the core die from the sand core;
s3-2: opening the external mold, and separating the external mold from the sand core;
the core mold is arranged in a cylindrical or round table shape, a plurality of structural grooves are formed in the inner circumferential surface of the outer mold, the core mold and the outer mold are coaxially arranged, and the core mold slides along the axial direction of the core mold in S3-1; the outer mold includes at least two mold halves that slide toward a side away from the core mold in S3-2.
By adopting the technical scheme, after the core sand generates strength and forms the sand core, the upper die is moved away firstly, then the core die is drawn out from the sand core along the axial direction of the core die, because the inner peripheral surface of the outer die is provided with the structural groove, the sand core can not slide along with the core die, and the outer peripheral surface of the sand core is still protected by the outer die.
The present application may be further configured in a preferred example to: at S3-1, the upper die is slid in the axial direction of the core mold in a direction away from the lower die, and the upper die is moved away.
By adopting the technical scheme, when the upper die is moved away, the upper die is not easy to scrape and rub the sand core to be close to one end surface of the upper die, so that the probability of damaging the sand core by the core die in the die opening process is reduced, and the precision of the sand core is improved.
The present application may be further configured in a preferred example to: at S3-1, the upper mold and the core mold are simultaneously slid in the axial direction of the core mold in a direction away from the lower mold, and the core mold is withdrawn from the sand core while the upper mold is removed;
the core mold is fixedly connected with the upper mold.
By adopting the technical scheme, the upper die and the core die are removed simultaneously, so that the steps required in die opening are reduced, and the die opening efficiency is improved; the upper die slides in the direction far away from the lower die along the axial direction of the lower die, and when the upper die is moved away, the upper die is not easy to scrape and rub the sand core to be close to one end surface of the upper die, so that the probability of damaging the sand core by the core die during die opening is reduced; 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: in S3-1, the core mold slides along its axis under guidance.
By adopting the technical scheme, in the core pulling process, the core mold slides along the self axis under the guidance, so that the core mold is not easy to jump along the self radial direction, the probability of collision between the core mold and the sand core is reduced, and the precision and the yield of the sand core are improved.
The present application may be further configured in a preferred example to: at S3-1, the core mold slides in the direction away from the upper mold in the axial direction of the core mold itself under guidance;
the lower die is provided with a first positioning hole, the core die penetrates through the first positioning hole, and the core die is guided by the first positioning hole when sliding.
Through adopting above-mentioned technical scheme, the mandrel slides towards the direction of keeping away from the mould under the direction of first locating hole, and the radial emergence of so the mandrel is difficult along self is beated, has reduced the probability that mandrel and psammitolite take place to collide with, has improved the precision and the yield of psammitolite.
The present application may be further configured in a preferred example to: at S3-1, the core mold slides along the axial direction of the core mold towards the direction far away from the lower mold under the guidance;
the lower die is provided with a second positioning hole, the core die is provided with a positioning shaft, the positioning shaft penetrates through the second positioning hole, and the core die is guided by the second positioning hole and the positioning shaft when sliding.
By adopting the technical scheme, the upper die and the core die slide towards the direction far away from the lower die under the guidance of the second positioning hole and the positioning shaft, so that the core die is not easy to jump along the radial direction of the core die, the probability of collision between the core die and the sand core is reduced, and the precision and the yield of the sand core are improved; meanwhile, when the upper die is moved away, the upper die is not easy to scrape and rub the sand core to be close to one end face of the upper die, the probability that the sand core is damaged by the core die during die opening is reduced, and the precision of the sand core is improved.
The present application may be further configured in a preferred example to: in S3-2, the mold half is slid in a direction perpendicular to the axis of the core toward the side away from the core.
By adopting the technical scheme, when the external mold is opened, the half molds slide back to back, and the half molds are not easy to collide with the sand core, so that the precision of the sand core is improved.
The present application may be further configured in a preferred example to: in S3-2, the mold halves are slid in a direction perpendicular to the axis of the core mold toward a side away from the core mold, and the outer mold includes at least three mold halves.
By adopting the technical scheme, the outer die comprises at least three half dies, and the half dies slide towards one side far away from the core die along the direction vertical to the axis of the core die, so that the two radial ends of the sand core are not easily scratched by the half dies, and the precision of the sand core is improved.
The present application may be further configured in a preferred example to: : at S3-2, the outer mold is slid toward the side away from the core mold in a direction perpendicular to the core mold axis under guidance;
the outer die comprises a first half die and a second half die, and the first half die and the second half die slide relative to the lower die along the direction vertical to the axis of the core die; the first half die is fixedly connected with a first positioning block, the first positioning block is abutted against the second half die, and the second half die is connected with the first positioning block in a sliding manner.
By adopting the technical scheme, when the mold is closed, the first half mold and the second half mold are limited by the first positioning block, 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, and then the inner peripheral surfaces of the first half mold and the second half mold are abutted against the outer peripheral surface of the lower mold, so that the mold closing of the first half mold, the second half mold and the lower mold is accurate, the manufacturing precision of the sand core is improved, and when the mold is opened, the first half mold and the second half mold are not easy to collide with the sand core under the guiding action of the first positioning block, and the precision of the sand core is improved.
In summary, the present application includes at least one of the following beneficial technical effects:
1. through the arrangement of S3-1 and S3-2, after the core sand generates strength and forms the sand core, the upper die is moved away firstly, then the core die is drawn out from the sand core along the axial direction of the core die, at the moment, the peripheral surface of the sand core is still protected by the outer die, when the core die is drawn out from the sand core, the sand core is not easy to damage, then the outer 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 further the precision of the socket end of the nodular cast iron pipe is improved.
2. At S3-1, the upper die is slid in the axial direction of the core mold in a direction away from the lower die, and the upper die is moved away; when the upper die is moved away, the upper die is not easy to scrape and rub the sand core to be close to one end surface of the upper die, the probability that the sand core is damaged by the core die when the die is opened is reduced, and the precision of the sand core is improved.
3. In S3-1, the core mold slides along the axis of the core mold under the guidance, and the core mold slides along the axis of the core mold under the guidance in the core pulling process, so that the core mold is not easy to jump along the radial direction of the core mold, the probability of collision between the core mold and the sand core is reduced, and the precision and the yield of the sand core are improved.
4. In S3-2, the half mould slides towards one side far away from the core mould along the direction vertical to the axis of the core mould, when the external mould is opened, the half mould slides back to back, and the half mould is not easy to collide with the sand core, so that the precision of the sand core is improved.
Drawings
Fig. 1 is a schematic overall flow chart of a first embodiment of the present application;
FIG. 2 is a schematic view of the overall structure of a cartridge according to an embodiment of the present application;
fig. 3 is a schematic view showing an overall structure of the core mold when it is opened according to the first embodiment of the present application;
FIG. 4 is a schematic view of the overall structure of the core mold and the upper mold in an embodiment of the present application;
FIG. 5 is an enlarged view of portion A of FIG. 3;
fig. 6 is a schematic overall structure diagram of a two-core box according to an embodiment of the present application.
Reference numerals: 1. a base; 2. a lower die; 21. a second positioning hole; 22. a first positioning hole; 3. an outer mold; 31. a first mold half; 311. a first positioning block; 32. a second mold half; 321. a guide surface; 33. constructing a groove; 34. a third mold half; 35. a fourth mold half; 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 1-6.
The first embodiment is as follows:
the embodiment of the application discloses a die opening method of a core shooting machine. Referring to fig. 1, the core making and mold opening method of the core shooter comprises the following steps:
s1: assembling the die, namely splicing the lower die, the upper die, the outer die and the core die together, and forming a cavity among the lower die, the upper die, the outer die and the core die;
s2: molding, namely injecting core sand into a cavity, introducing triethylamine gas into the cavity, and polymerizing the core sand into the sand core under the catalysis of the triethylamine gas to form the sand core;
s3: opening the mold, and opening the upper mold, the core mold and the outer mold;
wherein S3 further comprises S3-1: opening the outer mold with the loose core and S3-2;
s3-1: pulling cores, namely removing the upper die and extracting the core die from the sand core, wherein the upper die and the core die both slide towards the direction far away from the lower die along the self axial direction under the guidance;
s3-2: and opening the outer mold, separating the outer mold from the sand core, and sliding the half mold towards one side far away from the core mold along the direction vertical to the axis of the core mold.
Referring to fig. 2 and 3, the core box comprises a base 1, a lower die 2, an outer die 3, a core die 4 and an upper die 5, wherein the lower die 2 is arranged in a circular ring shape, and the lower die 2 is fixedly connected to the top end surface of the base 1 through a countersunk head 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 bottom portions of 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. The inner peripheral surfaces of the first half die 31 and the second half die 32 are both provided with a structural groove 33.
Referring to fig. 2 and 3, the core mold 4 is arranged in a cylindrical or truncated cone shape, the core mold 4 is coaxially arranged in the outer mold 3, and the core mold 4 is further fixedly connected to the upper mold 5 by a countersunk bolt. If the core mold 4 is cylindrical, the outer peripheral surface of the core mold 4 is formed with a draft angle such that the diameter of one end of the core mold 4 in the axial direction is larger than the diameter of the other end, and the end of the core mold 4 having the larger diameter always faces the upper mold 5 regardless of whether the core mold 4 is cylindrical or circular truncated cone.
The upper die 5 is covered on the outer die 3, and when the upper die 5 is covered on 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; the upper die 5 and the core die 4 both slide relative to the outer die 3 along the axial direction of the lower die 2. A cavity 6 is formed among the lower die 2, the outer die 3, the core die 4 and the upper die 5. Go up and seted up a plurality of sand blasting holes 51 on the mould 5, sand blasting holes 51 set up along the axle center equipartition of lower mould 2, and sand blasting holes 51 all communicates with die cavity 6 near the one end of die cavity 6.
Referring to fig. 2 and 3, the first positioning blocks 311 are fixedly connected to the outer peripheral surfaces of both ends of the first mold half 31 by means of countersunk bolts, and the first positioning blocks 311 abut against the outer peripheral surfaces of both ends of the second mold half 32. Chamfers are arranged at two ends of the outer peripheral surface of the second half die 32, so that guide surfaces 321 are formed at two ends of the second half die 32, when the first half die 31 and the second half die 32 are closed, the second half die 32 enables the outer peripheral surfaces at two ends of the second half die 32 to be abutted to the positioning blocks under the guide of the guide surfaces 321, and then the positioning of the first half die 31 and the second half die 32 is completed, so that the closing of the first half die 31, the second half die 32 and the lower die 2 is accurate, and the accuracy of sand core manufacturing is improved. When the first half die 31 and the second half die 32 are opened, the positioning block can also guide the first half die 31 and the second half die 32, so that the first half die 31 and the second half die 32 are not easy to collide with the sand core, and the precision of the sand core is improved.
Referring to fig. 3 and 4, since the lower die 2 is circular, the second positioning hole 21 is formed in the lower die 2 along the axis thereof, a positioning shaft 41 is integrally formed on the bottom end surface of the core die 4, the positioning shaft 41 is coaxially disposed 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 second positioning hole 21 under the guidance of the chamfer, and when the positioning shaft 41 is completely inserted into the second positioning hole 21, the bottom end surface of the core mold 4 is in abutment with the top end surface of the lower mold 2.
The implementation principle of the mold opening method of the core shooter in the embodiment is as follows:
when the mold is closed, the first half mold 31 and the second half mold 32 are relatively slid to be mutually abutted, then the core mold 4 and the upper mold 5 are slid along the axial direction of the lower mold 2 until the bottom end surface of the core mold 4 is abutted with the top end surface of the lower mold 2, at this time, the bottom end surface of the upper mold 5 is abutted with the top end surface of the outer mold 3, and the lower mold 2, the outer mold 3, the core mold 4 and the upper mold 5 are precisely closed under the positioning action of the first positioning block 311, the second positioning block 12 and the positioning shaft 41; and then, injecting core sand into the cavity 6 through the sand injection hole 51, then filling triethylamine gas into the cavity 6, enabling the core sand to form strength under the catalysis of the triethylamine gas, solidifying the core sand into a sand core, then opening the upper die 5 and the core die 4 along the axial direction of the lower die 2 towards the direction far away from the lower die 2, and then opening the first half die 31 and the second half die 32, thus completing the molding of the primary sand core.
Example two:
the embodiment of the application discloses a die opening method of a core shooting machine. The difference from the first embodiment is that, at S3-1: in the core pulling process, an upper die is moved away and the core die is drawn out of the sand core, the upper die slides towards the direction far away from the lower die along the axial direction of the core die, and the core die slides towards the direction far away from the upper die along the self axial direction under the guidance;
s3-2: and opening the outer mold, wherein the outer mold comprises a first half mold, a second half mold, a third half mold and a fourth half mold, and the first half mold, the second half mold, the third half mold and the fourth half mold slide towards one side far away from the core mold along the direction perpendicular to the axis of the core mold.
Referring to fig. 6, the core box comprises a base 1, a lower die 2, an outer die 3, a core die 4 and an upper die 5, wherein the lower die 2 is arranged in a circular ring shape, and is integrally formed on the top end surface of the base 1.
The outer die 3 comprises a first half die 31, a second half die 32, a third half die 34 and a fourth half die 35, the first half die 31, the second half die 32, the third half die 34 and the fourth half die 35 are uniformly distributed along the axis of the lower die 2, and the first half die 31, the second half die 32, the third half die 34 and the fourth half die 35 are connected with the base 1 in a sliding manner along the direction perpendicular to the axis of the lower die 2; when the first half die 31, the second half die 32, the third half die 34 and the fourth half die 35 slide relatively to each other until they are in contact with each other, the bottoms of the inner peripheral surfaces of the first half die 31, the second half die 32, the third half die 34 and the fourth half die 35 are in contact with the outer peripheral surface of the lower die 2. The inner peripheral surfaces of the first half die 31, the second half die 32, the third half die 34 and the fourth half die 35 are all provided with a structural groove 33.
The core mold 4 is arranged in a cylindrical or round table shape, the lower mold 2 is coaxially provided with a first positioning hole 22, the core mold 4 is arranged in the first positioning hole 22 in a penetrating manner, and the core mold 4 is connected with the base 1 in a sliding manner along the axial direction of the core mold 4. After the mold clamping is completed, the core mold 4 is coaxially disposed within the outer mold 3. If the core mold 4 is cylindrical, the outer peripheral surface of the core mold 4 is formed with a draft angle such that the diameter of one end of the core mold 4 in the axial direction is larger than the diameter of the other end, and the end of the core mold 4 having a larger diameter always faces the base 1 regardless of whether the core mold 4 is cylindrical or circular truncated cone.
The upper die 5 is covered on the outer die 3, and when the upper die 5 is covered on the outer die 3, the top end surface of the core die 4 is abutted against the bottom end surface of the upper die 5; the upper die 5 slides relative to the outer die 3 along the axial direction of the lower die 2. A cavity 6 is formed among the lower die 2, the outer die 3, the core die 4 and the upper die 5. Go up and seted up a plurality of sand blasting holes 51 on the mould 5, sand blasting holes 51 set up along the axle center equipartition of lower mould 2, and sand blasting holes 51 all communicates with die cavity 6 near the one end of die cavity 6.
The implementation principle of the mold opening method of the core shooter in the embodiment is as follows:
when the mold is closed, the first half mold 31, the second half mold 32, the third half mold 34 and the fourth half mold 35 are slid relatively to each other until they are in contact with each other, then the core mold 4 and the upper mold 5 are slid along the axial direction of the lower mold 2 until the top end surface of the core mold 4 is in contact with the bottom end surface of the upper mold 2, at this time, the bottom end surface of the upper mold 5 is in contact with the top end surface of the outer mold 3, and the lower mold 2, the outer mold 3, the core mold 4 and the upper mold 5 are closed precisely; and then, core sand is sprayed into the cavity 6 through the sand spraying hole 51, then, triethylamine gas is filled into the cavity 6, the core sand forms strength under the catalysis of the triethylamine gas, at the moment, the core sand is solidified into a sand core, then, the upper die 5 is opened along the axial direction of the lower die 2 towards the direction far away from the lower die 2, the core die 4 is opened along the axial direction of the lower die 2 towards the direction far away from the upper die 5, and then, the first half die 31, the second half die 32, the third half die 34 and the fourth half die 35 are opened along the direction vertical to the axis of the core die 4, so that the molding of the sand core is completed.
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 (9)
1. The die opening method of the core shooting machine is characterized by comprising the following steps of:
s1: assembling the die, namely splicing the lower die, the upper die, the outer die and the core die together, and forming a cavity among the lower die, the upper die, the outer die and the core die;
s2: molding, namely injecting core sand into a cavity, introducing triethylamine gas into the cavity, and polymerizing the core sand into the sand core under the catalysis of the triethylamine gas to form the sand core;
s3: opening the mold, and opening the upper mold, the core mold and the outer mold;
wherein S3 further comprises S3-1: opening the outer mold with the loose core and S3-2;
s3-1: pulling core, removing the upper die and extracting the core die from the sand core;
s3-2: opening the external mold, and separating the external mold from the sand core;
the core mold is arranged in a cylindrical or round table shape, a plurality of structural grooves are formed in the inner circumferential surface of the outer mold, the core mold and the outer mold are coaxially arranged, and the core mold slides along the axial direction of the core mold in S3-1; the outer mold includes at least two mold halves that slide toward a side away from the core mold in S3-2.
2. The method for opening a die of a core shooter according to claim 1, characterized in that: at S3-1, the upper die is slid in the axial direction of the core mold in a direction away from the lower die, and the upper die is moved away.
3. The method for opening a die of a core shooter according to claim 1, characterized in that: at S3-1, the upper mold and the core mold are simultaneously slid in the axial direction of the core mold in a direction away from the lower mold, and the core mold is withdrawn from the sand core while the upper mold is removed;
the core mold is fixedly connected with the upper mold.
4. The method for opening a die of a core shooter according to claim 1, characterized in that: in S3-1, the core mold slides along its axis under guidance.
5. The method for opening a die of a core shooter according to claim 4, characterized in that: at S3-1, the core mold slides in the direction away from the upper mold in the axial direction of the core mold itself under guidance;
the lower die is provided with a first positioning hole, the core die penetrates through the first positioning hole, and the core die is guided by the first positioning hole when sliding.
6. The method for opening a die of a core shooter according to claim 4, characterized in that: at S3-1, the core mold slides along the axial direction of the core mold towards the direction far away from the lower mold under the guidance;
the lower die is provided with a second positioning hole, the core die is provided with a positioning shaft, the positioning shaft penetrates through the second positioning hole, and the core die is guided by the second positioning hole and the positioning shaft when sliding.
7. The method for opening a die of a core shooter according to claim 1, characterized in that: in S3-2, the mold half is slid in a direction perpendicular to the axis of the core toward the side away from the core.
8. The method for opening a die of a core shooter according to claim 1, characterized in that: in S3-2, the mold halves are slid in a direction perpendicular to the axis of the core mold toward a side away from the core mold, and the outer mold includes at least three mold halves.
9. The method for opening a die of a core shooter according to claim 7, characterized in that: at S3-2, the outer mold is slid toward the side away from the core mold in a direction perpendicular to the core mold axis under guidance;
the outer die comprises a first half die and a second half die, and the first half die and the second half die slide relative to the lower die along the direction vertical to the axis of the core die; the first half die is fixedly connected with a first positioning block, the first positioning block is abutted against the second half die, and the second half die is connected with the first positioning block in a sliding manner.
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| CN202010854050.1A CN111922297A (en) | 2020-08-24 | 2020-08-24 | Die opening method of core shooting machine |
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| CN202010854050.1A CN111922297A (en) | 2020-08-24 | 2020-08-24 | Die opening method of core shooting machine |
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Application publication date: 20201113 |