CN-122007336-A - A take out piece device and core box for core box

CN122007336ACN 122007336 ACN122007336 ACN 122007336ACN-122007336-A

Abstract

The invention discloses a block drawing device for a core box and the core box, comprising at least two driving rods, a synchronous transmission assembly, a floating connection assembly and a floating connection assembly, wherein the driving rods are connected with a movable block of the core box at intervals along a first direction and are connected with a power source so as to drive the movable block to move along a second direction, the synchronous transmission assembly is respectively connected with the driving rods in a transmission way so as to enable the driving rods to synchronously move along the second direction, the floating connection assembly is arranged between the driving rods and the movable block and is configured to allow the movable block to generate displacement relative to the driving rods in the first direction, the second direction and the third direction, so that thermal expansion of the movable block is compensated, and the movable block and the driving rods are prevented from being blocked, thereby improving production stability and yield.

Inventors

GUO JIAN
WANG SHUMING
ZHENG DONGXU
ZHOU LINDONG
XU WEI
Zhou xingxian
LIU YONGYUE

Assignees

宁波合力科技股份有限公司

Dates

Publication Date: 20260512
Application Date: 20260410

Claims (10)

1. A block extraction device for a core box, comprising: the driving rods are connected with the movable block of the core box at intervals along the first direction and are used for being connected with a power source so as to drive the movable block to move along the second direction; the synchronous transmission assembly is respectively connected with the driving rods in a transmission way so as to enable the driving rods to synchronously move along the second direction; A floating link assembly mounted between the drive rod and the movable block, configured to allow displacement of the movable block relative to the drive rod in the first, second and third directions; The first direction is parallel to the length direction of the movable block, and the first direction, the second direction and the third direction are perpendicular to each other.
2. The block drawing device for a core box according to claim 1, wherein the synchronous transmission assembly comprises at least two synchronous racks, at least two synchronous gears and a synchronous shaft, each synchronous rack is fixed on the corresponding driving rod, each synchronous gear is arranged on the synchronous shaft at intervals along a first direction, and the synchronous gears are used for being meshed with the synchronous racks so as to enable each driving rod to synchronously move along a second direction.
3. The extraction block device for a core box of claim 2, further comprising a gap adjustment assembly comprising at least one of an axial adjustment and a radial adjustment; At least part of the axial adjusting piece is clamped between the synchronous rack and the driving rod along a second direction and/or is clamped between the driving rod and the power source along the second direction, so that the relative positions of the synchronous rack and the synchronous gear in the second direction can be adjusted; And at least part of the radial adjusting piece is clamped between the synchronous rack and the driving rod along a third direction and/or is clamped between the driving rod and the power source along the third direction, so that the relative positions of the synchronous rack and the synchronous gear in the third direction can be adjusted.
4. The extraction block device for a core box according to claim 1, wherein the floating connection assembly comprises a floating coupling for connecting the driving rod and the movable block; One end of the driving rod, which is close to the floating coupler, is provided with one of a switching part and a containing groove, one side of the floating coupler, which is close to the driving rod, is provided with the other one of the switching part and the containing groove, and the containing groove is in clearance fit with the switching part, so that the floating coupler is connected with the driving rod, and the floating coupler is allowed to displace relative to the driving rod in the first direction, the second direction and the third direction.
5. The block drawing device for the core box according to claim 4, wherein the accommodating groove is a T-shaped groove, and the width of the opening of the accommodating groove is smaller than the width of the groove bottom; The floating connecting assembly further comprises a pin shaft, the pin shaft is used for connecting the driving rod and the floating coupling, the switching part is provided with a through hole, the pin shaft is arranged in the through hole in a penetrating mode, the diameter of the through hole is larger than that of the pin shaft so as to allow the switching part to move relative to the pin shaft in the radial mode, and the length of the pin shaft is larger than the width of the switching part along the axial direction of the pin shaft so as to allow the switching part to move relative to the pin shaft in the axial mode.
6. The block extractor for a core box according to any one of claims 1 to 5, wherein the floating connection assembly includes a floating coupler for connecting the driving rod and the movable block, a floating fastener for connecting the floating coupler and the movable block, the floating fastener being adjusted so that the floating coupler is parallel to the opposite face of the driving rod, and a floating adjuster interposed between the floating coupler and the movable block in the second direction so that the floating coupler, the driving rod, and the movable block are held in contact.
7. The block extractor for cartridges of claim 6 wherein the floating fastener comprises a plurality of adjustment screws adapted to pass through the apertures in the movable block and to be threadably coupled to the floating coupler, the relative positions of the floating coupler and movable block in the second direction being adjusted by adjusting the length of the screw threaded to the floating coupler and the floating coupler being parallel to the opposite face of the drive rod; The floating adjusting piece is suitable for elastic deformation in a second direction, and is compressively clamped between the floating coupler and the movable block, wherein the total elastic force of the floating adjusting piece is larger than or equal to the driving force of the power source in the compression amount adjusting range of the floating adjusting piece, so that the floating coupler, the driving rod and the movable block are kept in contact.
8. The extraction block device for a core box of any one of claims 1-5, further comprising an insulation assembly comprising at least one of an insulation panel and a heat dissipating base; The heat insulation plate is arranged between the driving rod and the movable block, so that heat conduction between the driving rod and the movable block is isolated; The heat dissipation base is used for installing a power source and is provided with at least one of a heat dissipation fin, a cooling air duct and a cooling flow channel, so that heat dissipation can be carried out on the power source.
9. A core box, comprising: At least one set of molds defining at least one cavity, the molds comprising at least one movable block; the ejector device for a core box according to any one of claims 1 to 8, wherein the ejector device is connected between a power source and the movable block and is used for driving the movable block to perform a mold opening and closing action.
10. The core box of claim 9, comprising a locking assembly comprising at least one of a first locking structure, a second locking structure, and a third locking structure; The first locking structure is used for enabling the power source to keep driving force after film combination; the second locking structure is fixed on a front die or a rear die of the die, and when the die is closed, the second locking structure can wedge the movable block through a wedge-shaped surface; the third locking structure is movably arranged on the frame, and when the third locking structure is driven to move towards the movable block, the movable block can be wedged by the wedge-shaped surface.

Description

A take out piece device and core box for core box Technical Field The invention relates to the technical field of sand core forming dies, in particular to a block drawing device for a core box and the core box. Background At present, in a core box for forming complex thin-wall castings such as engine cylinders and the like, a long-strip movable block is easy to generate thermal expansion and thermal deformation in a working state. Meanwhile, because the length-diameter ratio is larger, in the heating and repeated use processes, the expansion amount and the deformation amount along the length direction are different, so that the deformation at the two ends is inconsistent, and the matching precision of the movable block is affected. In the related art, a double-cylinder or multi-cylinder driving is generally adopted for the long-strip movable block to realize die assembly. However, under the double-cylinder or multi-cylinder driving condition, the deformation of the movable block can cause difficulty in synchronous closing and locking, casting defects such as loose die assembly, sand running and the like can be caused, even the movable block is blocked or a guide mechanism is damaged, and the production stability and the yield are seriously affected. Disclosure of Invention It is an object of the present invention to provide a block extraction device for a core box, which solves or alleviates at least one of the above-mentioned drawbacks of the prior art. Another object of the present invention is to provide a core box having the above block drawing device. In order to achieve at least one aim, the technical scheme adopted by the invention is that the block drawing device for the core box comprises at least two driving rods, a synchronous transmission assembly and a floating connection assembly, wherein the driving rods are connected with a movable block of the core box at intervals along a first direction and are used for being connected with a power source so as to drive the movable block to move along a second direction, the synchronous transmission assembly is respectively connected with the driving rods in a transmission mode so as to enable the driving rods to synchronously move along the second direction, the floating connection assembly is arranged between the driving rods and the movable block and is configured to allow the movable block to move relative to the driving rods in the first direction, the second direction and the third direction, the first direction is parallel to the length direction of the movable block, and the first direction, the second direction and the third direction are perpendicular to each other. Preferably, the synchronous transmission assembly includes at least two synchronous racks, at least two synchronous gears and a synchronous shaft, each synchronous rack is fixed on the corresponding driving rod, each synchronous gear is arranged on the synchronous shaft at intervals along a first direction, and the synchronous gears are used for being meshed with the synchronous racks so as to enable each driving rod to synchronously move along a second direction. Preferably, the block drawing device for the core box further comprises a gap adjusting assembly, wherein the gap adjusting assembly comprises at least one of an axial adjusting piece and a radial adjusting piece, at least part of the axial adjusting piece is clamped between the synchronous rack and the driving rod along a second direction and/or is clamped between the driving rod and the power source along the second direction so as to adjust the relative positions of the synchronous rack and the synchronous gear along the second direction, at least part of the radial adjusting piece is clamped between the synchronous rack and the driving rod along a third direction and/or is clamped between the driving rod and the power source along the third direction so as to adjust the relative positions of the synchronous rack and the synchronous gear along the third direction. Preferably, the floating connecting assembly comprises a floating coupler, wherein the floating coupler is used for connecting the driving rod and the movable block, one end, close to the floating coupler, of the driving rod is provided with one of a switching part and a containing groove, one side, close to the driving rod, of the floating coupler is provided with the other one of the switching part and the containing groove, and the containing groove and the switching part are in clearance fit, so that the floating coupler is connected with the driving rod, and the floating coupler is allowed to displace relative to the driving rod in the first direction, the second direction and the third direction. The floating connecting assembly comprises a driving rod, a floating coupler, a through hole, a connecting part, a pin shaft, a connecting part and a pin shaft, wherein the driving rod is arranged on the connecting part, the pin shaft is arranged in the through h