Automatic core-pulling mechanism of single cylinder engine inner cavity movable blockTechnical Field
The invention belongs to the technical field of lost foam molds, and mainly provides an automatic core pulling mechanism of an inner cavity movable block of a single cylinder engine.
Background
The core pulling is mainly aimed at a molding area with a back-off (inconsistent with the upper and lower mold opening directions and requiring lateral movement) in the inner cavity of a single-cylinder engine product. A single cylinder engine product can have 1 or more inverted buckles according to different requirements of the product functions.
The existing single cylinder machine lost foam mould inner cavity loose pieces all adopt manual core pulling structures, the labor intensity of workers is high, the labor condition is bad (high-temperature operation), and in order to meet the requirements of full automation, unmanned operation and continuous uninterrupted production of clients, the single cylinder machine lost foam mould must all adopt automatic core pulling.
Disclosure of Invention
In order to solve the technical problems, the invention aims to provide an automatic core pulling mechanism of an inner cavity movable block of a single cylinder engine.
The invention adopts the following technical scheme for accomplishing the purposes:
An automatic core-pulling mechanism of a movable block in an inner cavity of a single cylinder engine, wherein the automatic core-pulling mechanism is a part of a lost foam mould of the single cylinder engine; the single cylinder engine lost foam mould comprises an upper mould, a lower mould and a stripper plate positioned between the upper mould and the lower mould; the automatic core pulling mechanism is provided with outer cylinders arranged at two sides of the single-cylinder engine lost foam mould; the outer cylinder is vertically arranged; the cylinder body of the outer cylinder is fixed in the middle of the outer side of the lower die of the single-cylinder lost foam die; a piston rod at the top end of the outer cylinder is fixedly connected with the stripper plate; the stripper plate is provided with a plurality of through holes which are penetrated by the following model inserts; the lower end of the lower die insert penetrates out of the stripper plate and is fixed on the lower die; the side surface of the lower die insert protruding out of the stripper plate part is provided with an inclined chute; the inclined chute is of a structure which is inclined from top to bottom and from inside to outside; a bump which can slide up and down along the corresponding inclined chute is matched with the inclined chute; the lug is fixed on the stripper plate to form a structure that the lug fixed on the stripper plate is driven to move up and down along the inclined chute under the action of the outer cylinder; the lug is fixedly connected with a movable block for forming the inner cavity of the single cylinder engine, so that a structure is formed that the movable block can move up and down along the inclined chute along with the lug to realize longitudinal and transverse demoulding; the automatic core pulling mechanism is also provided with a synchronous mechanism for simultaneously demoulding the front side and the rear side of the stripper plate relative to the lower die during demoulding.
The synchronous mechanism is provided with a rack fixed on the lower die; the racks are vertically arranged on the lower die and are symmetrically positioned on two sides of the corresponding outer cylinder; the lower end of the rack is fixed on the bottom plate of the lower die, the upper part of the rack is positioned in a guide groove arranged on the stripper plate, and the rack can slide in the guide groove; a gear meshed with the rack is fixed on the stripper plate; the gears are in one-to-one correspondence with the racks; when the demoulding is carried out under the action of the outer cylinder, the gear fixed on the demoulding plate is lifted along with the demoulding plate, the gear and the rack are matched to rotate, and the two gears on the same side of the demoulding plate synchronously rotate under the action of the synchronous shaft.
Four corners of the stripper plate are provided with limit guide posts, and guide sleeves are arranged on the lower die corresponding to the limit guide posts; the guide sleeve is in sliding fit with the limit guide post, so that the whole stripper plate is ensured to move stably.
The automatic core pulling mechanism for the single cylinder engine inner cavity movable block provided by the invention adopts the technical scheme, so that the automatic core pulling of the single cylinder engine inner cavity movable block is realized, the full-automatic unmanned continuous production of the single cylinder engine product white region in the lost foam field is realized, the possibility is provided for the subsequent production of unmanned white mold patterns for lost foam casting of the single cylinder engine, the production cost of the product is reduced by thirty percent, and the production efficiency is doubled.
Drawings
Fig. 1 is a schematic diagram of a mold clamping state of the present invention.
Fig. 2 is a schematic structural view of the mold opening state of the present invention.
Fig. 3 is a schematic structural view of the upper mold and the stripper plate of the present invention.
Fig. 4 is a cross-sectional view of an open mold structure with a diagonal chute and a bump in the present invention.
FIG. 5 is a cross-sectional view of a mold closing structure in which a diagonal chute and a bump are engaged.
In the figure: 1. the upper die, 2, the lower die, 3, the stripper plate, 4, the outside cylinder, 4-1, the piston rod, 5, the lower die insert, 6, the inclined chute, 7, the lug, 8, the loose piece, 9, the rack, 10, the gear, 11, the bearing base, 12, the synchronizing shaft, 13, the gear shaft, 14, the white die, 15 and the limit guide post.
Detailed Description
The present invention will be described with reference to the accompanying drawings and specific embodiments, in this document, the automatic core pulling mechanism is mainly involved, and the structures of the upper die and the lower die are not involved, so the structures of the upper die and the lower die are not described in detail herein;
as shown in fig. 1, 2 and 3, an automatic core-pulling mechanism of an inner cavity movable block of a single cylinder engine is a part of a lost foam mould of the single cylinder engine; the single cylinder engine lost foam mould comprises an upper mould 1, a lower mould 2 and a stripper plate 3 positioned between the upper mould 1 and the lower mould 2; the automatic core pulling mechanism is provided with outer cylinders 4 arranged at two sides of the single-cylinder engine lost foam mould; the outer cylinder 4 is vertically arranged; the cylinder body of the outer cylinder 4 is fixed in the middle of the outer side of the lower die 2 of the single-cylinder lost foam die; the piston rod 4-1 at the top end of the outer cylinder 4 is fixedly connected with the stripper plate 3 through a bracket fixed on the stripper plate; the stripper plate 3 is provided with a plurality of through holes for the lower mold inserts to pass through; the lower die inserts 5 are a plurality of different shapes and are respectively used for forming a plurality of cavities of the single cylinder engine, and are not described in detail here; the lower end of the lower die insert 5 penetrates out of the stripper plate 3 and is fixed on the lower die 2; referring to fig. 4 and 5, the lower mold insert 5 has a diagonal slide groove 6 on the side surface protruding from the stripper plate portion; the inclined chute is of a structure which is inclined from top to bottom and from inside to outside; a bump 7 which can slide up and down along the corresponding inclined chute is matched with the inclined chute 6; the convex blocks 7 are fixed on the demoulding plate 3, and the demoulding plate 3 drives the convex blocks 7 fixed on the demoulding plate 3 to move up and down along the inclined sliding grooves 6 under the action of the outer cylinder 4; the lug 7 is fixedly connected with a movable block 8 for forming the inner cavity of the single cylinder engine, so that a structure is formed that the movable block 8 can move up and down along the inclined chute along with the lug 7 to realize longitudinal and transverse demoulding; the automatic core pulling mechanism is also provided with a synchronous mechanism for simultaneously demoulding the front side and the rear side of the stripper plate 3 relative to the lower die during demoulding.
The synchronous mechanism is provided with a rack 9 fixed on the lower die; the racks are two racks 9 vertically arranged on the lower die, and the two racks 9 are symmetrically positioned at two sides of the corresponding outer cylinder 4; the lower end of the rack 9 is fixed on the bottom plate of the lower die 2, the upper end of the rack can slide in a guide groove on a stripper plate, and a gear meshed with the rack is fixed on the stripper plate; the gears are in one-to-one correspondence with the racks; a bearing base is fixed on the stripper plate; the bearing bases are positioned on two sides of the rack; the two bearing bases are fixed on two side wall surfaces of the guide groove; a gear shaft 13 matched with the gears is supported between the two bearing bases; the gear shafts of the two gears positioned on the same side of the stripper plate are respectively connected with the synchronous shaft in a keying way, so that the two gears positioned on the same side of the stripper plate move, when the stripper plate is stripped under the action of the outer cylinder 4, the gear 10 fixed on the stripper plate 3 ascends and descends along with the stripper plate 3, the gear 10 and the rack 9 are matched for rotation, and the two gears 10 positioned on the same side of the stripper plate 3 synchronously rotate under the action of the synchronous shaft 12.
Four corners of the stripper plate 3 are provided with limit guide posts 15, and guide sleeves are arranged on the lower die corresponding to the limit guide posts 15; the guide sleeve is in sliding fit with the limit guide post, so that the whole stripper plate is ensured to move stably.
The moving process of opening and closing the die by matching with the single-cylinder engine lost foam die comprises the following steps:
And (3) mould opening process: after the white mold 4 is molded, after the cylinder at the outer side of the upper mold is opened, the upper mold loose piece demolding is completed, then the upper mold 1 moves upwards through a molding machine to open the upper mold, the cylinder at the outer side of the lower mold 1 forms upward power to drive the demolding plate 3 to integrally move upwards, the demolding plate 3 drives the bearing base 11 to simultaneously move upwards, the gear 10 and the rack 9 form relative movement, the gear 10 starts to rotate, the synchronizing shaft 12 is driven to synchronously move with the gear shaft 13 at the other end through the split key connection between the gear shaft 13 and the synchronizing shaft 12, and meanwhile, 4 limit guide posts 15 at the periphery of the demolding plate also move upwards to ensure the stable movement of the whole demolding plate; the whole upward movement of the demoulding plate 3 moves together with the convex blocks, the convex blocks move upward in the inclined sliding grooves and generate transverse movement, the convex blocks move upward and simultaneously perform transverse demoulding, the movable blocks start to perform transverse demoulding, the back-off position in the white mould product is separated, and after the limit posts around reach the position, the ejection demoulding of the white mould is completed. The white mold is then removed by a robotic arm.
And (3) die assembly: after the die taking is completed, the outer cylinder 4 is closed to form downward power to drive the die plate to integrally move downwards, the die plate 3 drives the bearing base to simultaneously move downwards, the gear and the rack form relative motion, the gear starts to rotate, the synchronous shaft is driven to synchronously move with the other end gear shaft through the split key connection between the gear and the synchronous shaft, and meanwhile, 4 limit guide posts around the die plate also move downwards in a guiding way to ensure that the whole die plate moves stably; the whole downward movement of the stripper plate moves together with the lug, the lug moves downward relative to the inclined slideway to generate transverse movement, the movable block starts to reset, and when the stripper plate is stuck to the lower die, the limit guide post reaches the position. Resetting the movable block of the die; the upper die is moved downwards through a forming machine to complete die assembly of the upper die and the lower die, and the upper die movable block is ejected out by an upper die cylinder to reset; the whole die assembly action is completed.