CN115534225A - Quick replacement structure of mold change insert - Google Patents
Quick replacement structure of mold change insert Download PDFInfo
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- CN115534225A CN115534225A CN202210975473.8A CN202210975473A CN115534225A CN 115534225 A CN115534225 A CN 115534225A CN 202210975473 A CN202210975473 A CN 202210975473A CN 115534225 A CN115534225 A CN 115534225A
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- insert
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- positioning rod
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/26—Moulds
- B29C45/2602—Mould construction elements
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/1756—Handling of moulds or mould parts, e.g. mould exchanging means
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- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
The invention discloses a quick replacement structure for a mold change insert.A mold insert replacement device arranged on a rear template of a mold comprises an insert supporting mechanism, wherein the front end of the insert supporting mechanism is provided with a clamping groove for fixing the insert, the rear end of the insert supporting mechanism is connected with an insert driving mechanism, and the insert supporting mechanism is provided with a positioning groove; one side of the insert supporting mechanism is provided with an insert positioning mechanism, the insert positioning mechanism comprises a positioning rod, one end of the positioning rod is provided with a positioning block corresponding to the positioning groove, the other end of the positioning rod is connected with a positioning rod driving mechanism, and the positioning rod is provided with a reset spring. The quick replacement structure for the mold change insert has the advantages of convenience and quickness in insert replacement and small influence on production.
Description
Technical Field
The invention relates to the technical field of molds, in particular to a quick replacement structure for a money changing insert of an injection mold.
Background
Many parts of automobiles often have high-low configurations, when plastic products of automobiles have high-low configurations, local structural differences often exist between the high configurations and the low configurations, in order to save cost, only one pair of injection molds are generally opened, and the different structures adopt the mode of interchanging inserts to realize the production of different configurations. When the high-matching part is produced, the mold is provided with the insert with the high-matching structure, and when the low-matching part is produced, the mold is provided with the insert with the low-matching structure. However, the exchange of high and low-fit inserts requires the mold to be disassembled, for example, the high-fit insert is disassembled, replaced by the low-fit insert, and then the insert is produced on the machine. Therefore, when the height and the height are exchanged, the mold is removed manually and then the mold is put on the machine, generally, the mold is removed by the machine, the insert is exchanged, and the mold is put on the machine for production, which needs several hours or days, greatly influences the production rhythm and wastes time. The Chinese patent document with publication number CN216001252U, with publication number of 11/3/2022, discloses a mold structure for realizing product exchange production by quickly exchanging mold inserts, which comprises an upper mold and a lower mold, wherein the upper mold and the lower mold are both constructed into the existing mold structure, the lower mold is a female mold, and a molding cavity is formed between the upper mold and the lower mold; the interchangeable insert is arranged in the forming cavity and comprises an inserting portion inserted into the lower die and a functional portion fixedly connected with the inserting portion, the functional portion is arranged in the forming cavity, and a limiting assembly for limiting the inserting portion is arranged on the lower die. The mould structure designs products of different styles into a common main mould and local interchangeable mould core insert structure, and in the injection moulding production process, the differential production of the products of different styles can be realized only by interchanging the local mould core inserts; on one hand, the required number of the moulds can be reduced, and development cost is reduced; on the other hand, the die change work in the production process can be greatly reduced. This mould adopts spacing subassembly fixed to the mold insert, only is applicable to some small-size moulds of mold insert arch and uses, and on the other hand, spacing subassembly is firm inadequately to the fixed of mold insert, has influenced injection moulding product's quality.
Disclosure of Invention
The invention aims to solve the problems that when high and low matched inserts are replaced in an injection mold in the prior art, the injection mold needs to be dismounted manually and then mounted, time and labor are wasted, and great influence is caused on production.
The technical scheme adopted by the invention for solving the technical problems is that the quick replacement structure of the mold change insert comprises a front template and a rear template, wherein an insert replacement device of the mold is arranged on the rear template, the insert replacement device comprises an insert supporting mechanism, the front end of the insert supporting mechanism is provided with a clamping groove for fixing the insert, the rear end of the insert supporting mechanism is connected with an insert driving mechanism, and the insert supporting mechanism is provided with a positioning groove; one side of the insert supporting mechanism is provided with an insert positioning mechanism, the insert positioning mechanism comprises a positioning rod, one end of the positioning rod is provided with a positioning block corresponding to the positioning groove, the other end of the positioning rod is connected with a positioning rod driving mechanism, and the positioning rod is provided with a reset spring. The invention is characterized in that the rear template of the injection mold is provided with an insert replacing device, the insert replacing device comprises an insert supporting mechanism for fixing an insert, the insert is detachably arranged on the insert supporting mechanism, the rear side of the insert supporting mechanism is provided with an insert driving mechanism for pushing the insert on the insert supporting mechanism out of the rear template, different inserts can be replaced at the moment to meet the production requirements of parts with different configurations, after the insert is replaced, the insert driving mechanism resets, and the replaced insert enters a normal working position, so that the change production can be carried out. In addition, the insert replacing device also comprises an insert positioning mechanism, the insert positioning mechanism comprises a positioning rod and a positioning block arranged on the positioning rod, the positioning block corresponds to a positioning groove on the insert supporting mechanism and is used for fixing the position of the insert supporting mechanism, so that the position stability of an insert on the insert supporting mechanism is ensured, the change of the position of the insert caused by the acting force of the injection mold during working is avoided, the positioning rod is driven by a positioning rod driving mechanism, when the insert needs to be replaced, the positioning rod driving mechanism moves out the positioning block through the positioning rod to separate the positioning block from the positioning groove, the insert supporting mechanism is in an unlocking state so that the insert can be conveniently pushed out of a rear template, the positioning rod enables the positioning block to enter the positioning groove by the elasticity of a reset spring during normal working of the mold, the insert supporting mechanism is locked, the insert is prevented from being mistakenly pushed out by the insert driving mechanism, the front template is damaged by a refurbished insert, the insert is a protection device and is also a precise limiting device, and the problem that the insert driving mechanism is not stable so that the insert is loosened, and the produced product is further defected. Therefore, the semi-automatic insert changing device solves the problems that when the high-low insert is changed in the injection mold in the prior art, the injection mold needs to be manually disassembled and then operated, time and labor are wasted, and great influence is caused on production.
Preferably, the insert supporting mechanism comprises a rectangular supporting block and a supporting column vertically connected to the front side of one end of the supporting block, the clamping groove is formed in the front end of the supporting column, the positioning groove is formed in the end face of the connecting end of the supporting block and the supporting column, the insert driving mechanism is an insert driving cylinder, the insert driving cylinder is connected to a rear template on the rear side of the other end of the supporting block, a limiting block is arranged on the rear side of the connecting end of the supporting block and the supporting column, and an inclined plane is arranged on the supporting block on the rear side of the limiting groove. The insert supporting mechanism is L-shaped and comprises a supporting block vertical to the moving direction of the mold and a supporting column consistent with the moving direction of the mold, wherein the front end of the supporting column is clamped and fixed with the insert, and the rear side of the supporting column is provided with a limiting block. The insert driving cylinder and the support column are arranged in a staggered mode, namely the insert driving cylinder and the support column are respectively arranged at the two ends of the support block, so that when the insert is acted by the mold, the acting force cannot be directly acted on the insert driving cylinder, but is stressed by the limiting block fixed on the rear template from the rear side of the support column, the service life of equipment can be prolonged, and the reliability is improved.
Preferably, a rear die cavity is arranged in the rear die plate, the supporting block is arranged in the rear die cavity, a through hole is formed in the front wall of the rear die cavity, the supporting column is matched in the through hole, the insert driving cylinder is arranged on the rear side of the rear die cavity, the supporting block is driven to move back and forth in the rear die cavity when the insert driving cylinder acts, and the supporting block drives the supporting column to move back and forth in the through hole when moving. The rear die cavity is rectangular and is matched with the rectangular supporting block, so that the supporting block can be ensured to slide smoothly in the rear die cavity.
Preferably, the positioning rod driving mechanism comprises a fixed seat arranged on one side of the rear template, an elastic block groove is formed in the front side face of the fixed seat, the length direction of the elastic block groove is consistent with the axial direction of the positioning rod, an elastic block is arranged in the elastic block groove, one end, far away from the positioning block, of the positioning rod penetrates through the groove wall of the elastic block groove and is fixedly connected with one end of the elastic block, and the elastic block is connected with a positioning rod driving cylinder. The positioning rod driving cylinder is used for driving the elastic block to transversely move so as to drive the positioning rod to drive the positioning block to be separated from the positioning groove.
Preferably, the middle part of the elastic block is provided with a single-sided wedge-shaped groove with a narrow front part and a wide rear part, the positioning rod driving cylinder is arranged on a fixed seat at the rear side of the single-sided wedge-shaped groove, the front end of a piston rod of the positioning rod driving cylinder is provided with a single-sided wedge-shaped block corresponding to the single-sided wedge-shaped groove, when the piston rod of the positioning rod driving cylinder extends forwards, the single-sided wedge-shaped block is inserted into the single-sided wedge-shaped groove, the elastic block moves towards the direction away from the rear template and drives a positioning block to be separated from the positioning groove through the positioning rod, and when the piston rod of the positioning rod driving cylinder retracts, a reset spring drives the positioning rod to reset; the fixing seat is also provided with a wedge-shaped block locking screw. Because the connection between the positioning block and the positioning groove is tight, and the force required for separating the positioning block from the positioning groove is larger, the single-side wedge-shaped groove is arranged on the elastic block, and the elastic block transversely moves in a mode that the single-side wedge-shaped block at the front end of the piston rod of the positioning rod driving cylinder is inserted into the single-side wedge-shaped groove, so that the slope relation of the single-side wedge-shaped block and the single-side wedge-shaped groove is utilized, the labor is saved, and the cost is reduced. When the die works normally, the elastic force of the return spring enables the positioning block to enter the positioning groove, external power is not needed, and energy is saved. The wedge locking screw is used for locking the single-side wedge when the die works normally, and the die is prevented from being damaged due to misoperation of the positioning rod driving cylinder. When the insert does not need to be replaced, the wedge-shaped block locking screw is screwed, the front end of the wedge-shaped block locking screw is positioned in the limiting hole on the single-side wedge-shaped block, the single-side wedge-shaped block and the fixing seat are locked together, the movement of the single-side wedge-shaped block is limited, and the phenomenon that the elastic block and the positioning block move due to misoperation of the positioning rod driving cylinder, so that the function of the elastic block and the positioning block is invalid is avoided; when the insert needs to be replaced, the wedge-shaped block locking screw is loosened to enable the wedge-shaped block to be separated from the single-side wedge-shaped block, the positioning rod driving cylinder drives the single-side wedge-shaped block, and the positioning block is driven by the elastic block to be separated from the positioning groove in the supporting block.
Preferably, one side that the bullet piece is close to the locating lever is equipped with the fixed slot, and the locating piece was kept away from to the locating lever one end setting in the fixed slot, is equipped with the lock joint groove on the locating lever, is equipped with the lock joint piece in the fixed slot, the locating lever pass through the lock joint piece and bullet piece lock joint fixed. And a fixing buckle is arranged in the fixing groove and used for fixing the positioning rod and the elastic block.
Preferably, the clamping groove is a T-shaped groove, a T-shaped clamping block matched with the T-shaped groove is arranged on the rear end face of the insert, a stepped mounting hole perpendicular to the length direction of the T-shaped clamping block is formed in the T-shaped clamping block, a limiting column is arranged in the mounting hole, a pressure spring is sleeved on the limiting column, a limiting head extending out of the T-shaped clamping block is arranged at one end of the limiting column, a threaded sleeve is screwed at the large-diameter end of the mounting hole, the other end of the limiting column penetrates through an inner hole of the threaded sleeve, the pressure spring is arranged between the threaded sleeve and the limiting head, a limiting hole matched with the limiting head is formed in the groove wall of the T-shaped groove, and the end of the limiting head is hemispherical. The connection mode of the insert and the support column is flexible connection, the whole connection and fixing mode does not depend on screws and pins, the stress mode adopts a T-shaped groove structure, the stress direction does not adopt a limit column, the T-shaped groove meets the precision and the support in the stress direction, and the limit column meets the precision and the positioning in the stress direction. The pressure spring is installed on the limiting column, then the pressure spring is installed in the stepped mounting hole together, the threaded sleeve is locked, a hole is formed in the threaded sleeve and matched with the limiting column, the motion of the limiting column is stable during reciprocating motion, after the installation is completed, a limiting head at one end of the limiting column protrudes out of the T-shaped fixture block, the limiting head is located in the limiting hole of the T-shaped groove wall to play a limiting role during working, and the limiting head can be pressed to retract when the mold insert is disassembled, so that the mold insert is moved out of the T-shaped groove.
Preferably, the cross section of the support column is smaller than that of the insert body, an insert groove corresponding to the insert is formed in the rear template, when the support block retreats, the outer edge of the rear end face of the insert abuts against the groove bottom of the insert groove, and a buffering inclined plane is arranged on the periphery of the rear end face of the insert. The cross section of the insert main body is larger than that of the support column, the area of the money changing insert is generally larger, the injection pressure can be very large during production, if the insert is as large as the support column, only the insert driving cylinder and the limit block support the insert under the injection pressure, the insert driving cylinder can be caused to retreat, the product has a section difference, and the insert is larger than the support column, then under the injection pressure, a rear template supports the insert, and the insert driving cylinder and the limit block only play a role in driving and limiting and do not bear redundant force.
As the preferred, preceding template is fixed on preceding fixed plate, and the back template is fixed on the fixed plate of back through square iron, is equipped with position circle and purt mouth on the preceding fixed plate, is equipped with preceding thimble board and back thimble board on the back template. The injection mold of the invention is of a conventional structure except for the quick replacement structure of the change insert.
The quick replacement structure for the mold change insert has the advantages that the problems that when the high-low matched insert of the injection mold in the prior art is replaced, the injection mold needs to be taken off and manually disassembled, the mold is taken off and then the injection mold is taken on again, time and labor are wasted, and great influence is caused on production are effectively solved.
Drawings
FIG. 1 is a schematic view of an overall structure of an injection mold according to the present invention when the mold is closed;
FIG. 2 is a schematic perspective view of the insert changing apparatus for an injection mold according to the present invention;
FIG. 3 is a schematic perspective exploded view of the insert changing apparatus for an injection mold according to the present invention;
FIG. 4 is a schematic view of the injection mold according to the present invention in an open state;
FIG. 5 is a schematic diagram of a configuration of the ejection state of the insert of the injection mold of the present invention;
FIG. 6 is a schematic diagram of a reset procedure after insert replacement for an injection mold according to the present invention;
FIG. 7 is a schematic view of a configuration of the present invention in a state where the insert replacement of the injection mold is completed;
FIG. 8 is a schematic view of the injection mold insert of the present invention when it is replaced and closed.
In the figure: 1. the fixture comprises a front template, 2 parts of a rear template, 3 parts of an insert supporting mechanism, 4 parts of an insert, 5 parts of clamping grooves, 6 parts of positioning grooves, 7 parts of an insert positioning mechanism, 8 parts of positioning rods, 9 parts of positioning blocks, 10 parts of reset springs, 11 parts of supporting blocks, 12 parts of supporting columns, 13 parts of insert driving cylinders, 14 parts of limiting blocks, 15 parts of a rear mold cavity, 16 parts of a fixing seat, 17 parts of elastic block grooves, 18 parts of elastic blocks, 19 parts of positioning rod driving cylinders, 20 parts of single-side wedge-shaped grooves, 21 parts of single-side wedge-shaped blocks, 22 parts of wedge-shaped block locking screws, 23 parts of fixing grooves, 24 parts of buckling grooves, 25 parts of buckling blocks, 26.T-shaped clamping blocks, 27 parts of mounting holes, 28 parts of limiting columns, 29 parts of pressure springs, 30 parts of limiting heads, 31 parts of screw sleeves, 32 parts of limiting holes, 33 parts of buffering inclined planes, 34 parts of a front fixing plate, 35 parts of square iron, 36 parts of a rear fixing plate, 37 parts of positioning rings, 38 parts of a sprue, 39 parts of a front thimble plate, 40 parts of a rear thimble plate, 41 parts of a sealing ring, 42 parts of a fixing bolt, and 44 parts of a workpiece.
Detailed Description
The following describes a specific embodiment of the present invention by way of example with reference to the accompanying drawings, wherein the front template is a front side and the rear template is a rear side as a front and rear reference for position expression.
Example 1
In embodiment 1 shown in fig. 1, a quick replacement structure for a mold change insert comprises a front mold plate 1 and a rear mold plate 2, the front mold plate is fixed on a front fixing plate 34, the rear mold plate is fixed on a rear fixing plate 36 through square iron 35, the front fixing plate is provided with a positioning ring 37 and a squirt nozzle 38, and the rear mold plate is provided with a front ejector plate 39 and a rear ejector plate 40. The rear template is provided with an insert replacing device of the mold (see fig. 2 and fig. 3, and fig. 3 shows the insert before and after replacement), the insert replacing device comprises an insert supporting mechanism 3, the front end of the insert supporting mechanism is provided with a clamping groove 5 for fixing an insert 4, the clamping groove of the embodiment is a T-shaped groove, and the rear end surface of the insert is provided with a T-shaped clamping block 26 matched with the T-shaped groove. The rear end of the insert supporting mechanism is connected with the insert driving mechanism, and the insert supporting mechanism is provided with a positioning groove 6; the mold insert positioning mechanism 7 is arranged on one side of the mold insert supporting mechanism and comprises a positioning rod 8 which is of a stepped shaft-shaped structure, a positioning block 9 corresponding to the positioning groove is arranged at the end part of a large-diameter section of the positioning rod, an inclined plane is arranged on one side of the front side face of the positioning block, and the inclined plane is convenient for the positioning rod to be compressed when the supporting mechanism is reset, so that clamping stagnation is avoided; the rear side surface of the positioning block is a plane for clamping the supporting mechanism, and a guide section matched with the rear template is also arranged on the positioning rod, so that the positioning rod can smoothly reciprocate in the rear template; the end part of the small diameter section of the positioning rod is connected with a driving mechanism of the positioning rod, and the small diameter section of the positioning rod is sleeved with a return spring 10.
The insert supporting mechanism comprises a rectangular supporting block 11 and a supporting column 12 vertically connected to the front side of one end of the supporting block, the clamping groove is formed in the front end of the supporting column, the positioning groove is formed in the end face of the connecting end of the supporting block and the supporting column, the insert driving mechanism is an insert driving cylinder 13 (a hydraulic oil cylinder is adopted in the embodiment), the insert driving cylinder is connected to a rear template on the rear side of the other end of the supporting block and fixed through a fixing bolt 42, and a sealing ring 41 is arranged between the insert driving cylinder and the rear template and used for sealing between the insert driving cylinder and the rear template; the supporting block and the supporting column are connected with a limiting block 14 at the rear side, and an inclined plane is arranged on the supporting block at the rear side of the limiting groove. The mold insert supporting mechanism is L-shaped and comprises a supporting block vertical to the moving direction of the mold and a supporting column consistent with the moving direction of the mold, the front end of the supporting column is clamped and fixed with the mold insert, and a limiting block is arranged on the rear side of the supporting column. The insert driving cylinder and the supporting column are arranged in a staggered mode, namely the insert driving cylinder and the supporting column are respectively arranged at two ends of the supporting block, so that when the insert is subjected to the acting force of the mold, the acting force cannot directly act on the insert driving cylinder, but the rear side of the supporting column is fixed on a limiting block on the rear template to bear the force, the service life of the device can be prolonged, and the reliability is improved.
The rear die is characterized in that a rear die cavity 15 is arranged in the rear die plate, the supporting block is arranged in the rear die cavity, a through hole is formed in the front wall of the rear die cavity, the supporting column is matched in the through hole, the insert driving cylinder is arranged on the rear side of the rear die cavity, the supporting block is driven to move back and forth in the rear die cavity when the insert driving cylinder acts, and the supporting block drives the supporting column to move back and forth in the through hole. The rear die cavity is rectangular and is matched with the rectangular supporting block, so that the supporting block can be ensured to slide smoothly in the rear die cavity.
Be equipped with in the T type fixture block of this embodiment with T type fixture block length direction vertically echelonment mounting hole 27, be equipped with spacing post 28 in the mounting hole, the cover is equipped with pressure spring 29 on the spacing post, and the one end of spacing post is equipped with the spacing head 30 that stretches out T type fixture block, and the major diameter end spiro union of mounting hole has swivel nut 31, and the other end of spacing post is worn to establish in the hole with the swivel nut, the pressure spring sets up between swivel nut and spacing head, is equipped with the spacing hole 32 with spacing head adaptation on the cell wall in T type groove, the tip of spacing head is hemispherical. The connection mode of the insert and the support column is flexible connection, the whole connection and fixing mode does not depend on screws and pins, the stress mode adopts a T-shaped groove structure, the stress direction does not adopt a limit column, the T-shaped groove meets the precision and the support in the stress direction, and the limit column meets the precision and the positioning in the stress direction. The pressure spring is installed on the limiting column, then the pressure spring is installed in the stepped mounting hole together, the threaded sleeve is locked, a hole is formed in the threaded sleeve and matched with the limiting column, the motion of the limiting column is stable during reciprocating motion, after the installation is completed, a limiting head at one end of the limiting column protrudes out of the T-shaped fixture block, the limiting head is located in the limiting hole of the T-shaped groove wall to play a limiting role during working, and the limiting head can be pressed to retract when the mold insert is disassembled, so that the mold insert is moved out of the T-shaped groove.
The support column and the insert main body of the embodiment are cylindrical, the cross section of the support column is smaller than that of the insert main body, an insert groove corresponding to the insert is formed in the rear template, when the support block retreats, the outer edge of the rear end face of the insert is abutted to the groove bottom of the insert groove, and a buffering inclined plane 33 is arranged on the periphery of the rear end face of the insert. The cross section of the insert main body is larger than that of the support column, the area of the money changing insert is generally larger, the injection pressure can be very large during production, if the insert is as large as the support column, only the insert driving cylinder and the limit block support the insert under the injection pressure, the insert driving cylinder can be caused to retreat, the product has a section difference, and the insert is larger than the support column, then under the injection pressure, a rear template supports the insert, and the insert driving cylinder and the limit block only play a role in driving and limiting and do not bear redundant force.
The positioning rod driving mechanism comprises a fixing seat 16 arranged on one side of the rear template, an elastic block groove 17 is formed in the front side face of the fixing seat, the length direction of the elastic block groove is consistent with the axial direction of the positioning rod, an elastic block 18 is arranged in the elastic block groove, one end, far away from the positioning block, of the positioning rod penetrates through the groove wall of the elastic block groove and is fixedly connected with one end of the elastic block, and the elastic block is connected with a positioning rod driving cylinder 19 (a hydraulic oil cylinder is adopted in the embodiment). The middle part of the elastic block is provided with a single-sided wedge-shaped groove 20 with a narrow front part and a wide back part, the positioning rod driving cylinder is arranged on a fixed seat at the back side of the single-sided wedge-shaped groove and is fixed through a fixing bolt, and a sealing ring is arranged between the positioning rod driving cylinder and the fixed seat; the front end of a piston rod of the positioning rod driving cylinder is provided with a single-sided wedge block 21 corresponding to the single-sided wedge groove, when the piston rod of the positioning rod driving cylinder extends forwards, the single-sided wedge block is inserted into the single-sided wedge groove, the elastic block moves towards the direction away from the rear template and drives the positioning block to be separated from the positioning groove through the positioning rod, and when the piston rod of the positioning rod driving cylinder retracts, the reset spring drives the positioning rod to reset; the fixing seat is also provided with a wedge-shaped block locking screw 22. The positioning rod driving cylinder is used for driving the elastic block to transversely move so as to drive the positioning rod to drive the positioning block to be separated from the positioning groove. Because the connection between the positioning block and the positioning groove is tight, and the force required for separating the positioning block from the positioning groove is large, the single-side wedge-shaped groove is arranged on the elastic block, the elastic block transversely moves in a mode that the single-side wedge-shaped block at the front end of the piston rod of the positioning rod driving cylinder is inserted into the single-side wedge-shaped groove, and therefore the inclined surface relation between the single-side wedge-shaped block and the single-side wedge-shaped groove is utilized, labor is saved, and the cost is reduced. When the mold normally works, the elastic force of the return spring enables the positioning block to enter the positioning groove, external power is not needed, and energy is saved. The wedge locking screw is used for locking the single-side wedge when the die works normally, and the die is prevented from being damaged due to misoperation of the positioning rod driving cylinder. When the insert does not need to be replaced, the wedge-shaped block locking screw is screwed, the front end of the wedge-shaped block locking screw is positioned in the limiting hole in the single-side wedge-shaped block, the single-side wedge-shaped block and the fixing seat are locked together, the movement of the single-side wedge-shaped block is limited, and the phenomenon that the elastic block and the positioning block move to cause functional failure due to misoperation of a positioning rod driving cylinder is avoided; when the insert needs to be replaced, the wedge-shaped block locking screw is loosened to be separated from the single-side wedge-shaped block, the positioning rod driving cylinder drives the single-side wedge-shaped block, and the positioning block is driven by the elastic block to be separated from the positioning groove in the supporting block.
One side that the bullet piece is close to the locating lever is equipped with fixed slot 23, and the locating piece was kept away from to the locating lever one end setting is in the fixed slot, and the tip of locating lever path section is equipped with lock joint groove 24, is equipped with lock joint piece 25 in the fixed slot, the locating lever pass through lock joint piece and bullet piece lock joint fixed. And a fixing buckle is arranged in the fixing groove and used for fixing the positioning rod and the elastic block. The buckling block is in an inverted U shape, is fixed in the fixing groove through the fixing screw and is buckled and fixed with the buckling groove arranged on the positioning rod.
The insert replacement process of the invention is as follows:
1. opening the front and rear templates of the injection mold in a mold closing state (shown in figure 1), taking out a workpiece I43 before changing money, and then loosening a wedge block locking screw (shown in figure 4);
2. the positioning rod driving cylinder pushes the single-side wedge block to move forwards, the single-side wedge block pushes the elastic block to move towards one side far away from the mold, the elastic block drives the positioning rod to compress the return spring, and the positioning block is separated from the positioning groove in the supporting block; the insert driving cylinder acts to eject the supporting block, the supporting column and the insert out of the rear template (see fig. 5);
3. replacing the insert, namely separating a limiting head on the limiting column from the limiting hole, and moving the insert out along the length direction of the T-shaped groove; then pressing the limiting head by using a new money changing insert, and installing a T-shaped fixture block of the insert from the end surface of the T-shaped groove until the limiting column is clamped into the limiting hole;
4. the insert driving cylinder drives the supporting column to retreat and drives the insert to enter the rear template, the positioning rod driving cylinder pulls the single-side wedge block to move backwards, the single-side wedge block resets and locks a wedge block locking screw, the elastic block and the positioning rod move towards the direction of the mold to reset under the action of a reset spring, an inclined plane on the supporting block abuts against and compresses an inclined plane of the positioning block (see figure 6) to enable the positioning block to move towards the direction away from the mold, when the rear part of the supporting block abuts against the limiting block, the supporting block stops moving, and the positioning block moves towards the direction of the mold and is clamped in a positioning groove of the supporting block (see figure 7) under the action of the reset spring;
5. the clamping normally produces a new second change workpiece 44 (see fig. 8).
The invention is characterized in that the rear template of the injection mold is provided with an insert replacing device, the insert replacing device comprises an insert supporting mechanism for fixing an insert, the insert is detachably arranged on the insert supporting mechanism, the rear side of the insert supporting mechanism is provided with an insert driving mechanism for pushing the insert on the insert supporting mechanism out of the rear template, different inserts can be replaced at the moment to meet the production requirements of parts with different configurations, after the insert is replaced, the insert driving mechanism resets, and the replaced insert enters a normal working position, so that the change production can be carried out. In addition, the insert replacing device also comprises an insert positioning mechanism, the insert positioning mechanism comprises a positioning rod and a positioning block arranged on the positioning rod, the positioning block corresponds to a positioning groove on the insert supporting mechanism and is used for fixing the position of the insert supporting mechanism, so that the position stability of an insert on the insert supporting mechanism is ensured, the change of the position of the insert caused by the acting force of the injection mold during working is avoided, the positioning rod is driven by a positioning rod driving mechanism, when the insert needs to be replaced, the positioning rod driving mechanism moves out the positioning block through the positioning rod to separate the positioning block from the positioning groove, the insert supporting mechanism is in an unlocking state so that the insert can be conveniently pushed out of a rear template, the positioning rod enables the positioning block to enter the positioning groove by the elasticity of a reset spring during normal working of the mold, the insert supporting mechanism is locked, the insert is prevented from being mistakenly pushed out by the insert driving mechanism, the front template is damaged by a refurbished insert, the insert is a protection device and is also a precise limiting device, and the problem that the insert driving mechanism is not stable so that the insert is loosened, and the produced product is further defected. Therefore, the invention solves the problems that when the high-low matched inserts of the injection mold in the prior art are replaced, the injection mold needs to be taken off and manually disassembled and then put on the injection mold, time and labor are wasted, and great influence is caused on production.
In addition to the above embodiments, the technical features or technical data of the present invention may be reselected and combined to form new embodiments within the scope of the claims and the specification of the present invention, which are all realized by those skilled in the art without creative efforts, and thus, the embodiments of the present invention not described in detail should be regarded as specific embodiments of the present invention and are within the protection scope of the present invention.
Claims (9)
1. The quick replacement structure of the mold change insert is characterized in that the mold comprises a front template (1) and a rear template (2), the rear template is provided with an insert replacement device of the mold, the insert replacement device comprises an insert supporting mechanism (3), the front end of the insert supporting mechanism is provided with a clamping groove (5) for fixing an insert (4), the rear end of the insert supporting mechanism is connected with an insert driving mechanism, and the insert supporting mechanism is provided with a positioning groove (6); one side of the insert supporting mechanism is provided with an insert positioning mechanism (7), the insert positioning mechanism comprises a positioning rod (8), one end of the positioning rod is provided with a positioning block (9) corresponding to the positioning groove, the other end of the positioning rod is connected with a positioning rod driving mechanism, and the positioning rod is provided with a reset spring (10).
2. The quick replacement structure for the mold change insert according to claim 1, wherein the insert supporting mechanism comprises a rectangular supporting block (11) and a supporting column (12) vertically connected to the front side of one end of the supporting block, the clamping groove is formed in the front end of the supporting column, the positioning groove is formed in the end surface of the connecting end of the supporting block and the supporting column, the insert driving mechanism is an insert driving cylinder (13) connected to the rear mold plate on the rear side of the other end of the supporting block, a limiting block (14) is arranged on the rear side of the connecting end of the supporting block and the supporting column, and a slope is arranged on the supporting block on the rear side of the limiting groove.
3. The quick replacement structure for the refurbishing insert according to claim 2, wherein a rear mold cavity (15) is arranged in the rear mold plate, the supporting block is arranged in the rear mold cavity, a through hole is formed in the front wall of the rear mold cavity, the supporting column is adapted in the through hole, the insert driving cylinder is arranged at the rear side of the rear mold cavity, and when the insert driving cylinder is operated, the supporting block is driven to move back and forth in the rear mold cavity, and the supporting block is driven to move the supporting column back and forth in the through hole.
4. The quick replacement structure for the mold change insert according to claim 1, wherein the positioning rod driving mechanism comprises a fixing seat (16) disposed at one side of the back mold plate, a spring block groove (17) is disposed at a front side surface of the fixing seat, a length direction of the spring block groove is consistent with an axial direction of the positioning rod, a spring block (18) is disposed in the spring block groove, one end of the positioning rod far away from the positioning block passes through a groove wall of the spring block groove to be fixedly connected with one end of the spring block, and the spring block is connected with a positioning rod driving cylinder (19).
5. The quick replacement structure for the mold change insert according to claim 4, wherein a single-sided wedge groove (20) with a narrow front part and a wide rear part is formed in the middle of the spring block, the positioning rod driving cylinder is arranged on a fixed seat at the rear side of the single-sided wedge groove, a single-sided wedge block (21) corresponding to the single-sided wedge groove is arranged at the front end of a piston rod of the positioning rod driving cylinder, when the piston rod of the positioning rod driving cylinder extends forwards, the single-sided wedge block is inserted into the single-sided wedge groove, the spring block moves towards the direction away from the rear mold plate and drives the positioning block to be separated from the positioning groove through the positioning rod, and when the piston rod of the positioning rod driving cylinder retracts, the positioning rod is driven to reset by a reset spring; the fixing seat is also provided with a wedge-shaped block locking screw (22).
6. The quick replacement structure for the mold refurbishing insert according to claim 4, wherein a fixing groove (23) is formed on one side of the spring block close to the positioning rod, one end of the positioning rod away from the positioning block is arranged in the fixing groove, a fastening groove (24) is formed on the positioning rod, a fastening block (25) is arranged in the fixing groove, and the positioning rod is fastened and fixed with the spring block through the fastening block.
7. The quick replacement structure of the mold change insert according to claim 2, wherein the clamping groove is a T-shaped groove and is arranged at the front end of the support pillar, a T-shaped fixture block (26) matched with the T-shaped groove is arranged on the rear end surface of the insert, a stepped mounting hole (27) perpendicular to the length direction of the T-shaped fixture block is arranged in the T-shaped fixture block, a limiting pillar (28) is arranged in the mounting hole, a pressure spring (29) is sleeved on the limiting pillar, a limiting head (30) extending out of the T-shaped fixture block is arranged at one end of the limiting pillar, a threaded sleeve (31) is screwed at the large-diameter end of the mounting hole, the other end of the limiting pillar is arranged in an inner hole of the threaded sleeve in a penetrating manner, the pressure spring is arranged between the threaded sleeve and the limiting head, a limiting hole (32) matched with the limiting head is arranged on the wall of the T-shaped groove, and the end of the limiting head is hemispherical.
8. The structure for rapidly replacing a mold change insert according to claim 2, wherein the cross section of the support post is smaller than the cross section of the insert body, an insert groove corresponding to the insert is formed in the rear template, when the support block is retracted, the outer edge of the rear end surface of the insert abuts against the bottom of the insert groove, and a buffer slope (33) is formed on the periphery of the rear end surface of the insert.
9. The quick change structure for a mold change insert according to any one of claims 1 to 8, wherein the front mold plate is fixed to a front fixing plate (34), the rear mold plate is fixed to a rear fixing plate (36) through square iron (35), the front fixing plate is provided with a positioning ring (37) and a squirt nozzle (38), and the rear mold plate is provided with a front ejector plate (39) and a rear ejector plate (40).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210975473.8A CN115534225A (en) | 2022-08-15 | 2022-08-15 | Quick replacement structure of mold change insert |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210975473.8A CN115534225A (en) | 2022-08-15 | 2022-08-15 | Quick replacement structure of mold change insert |
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| Publication Number | Publication Date |
|---|---|
| CN115534225A true CN115534225A (en) | 2022-12-30 |
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|---|---|---|---|
| CN202210975473.8A Pending CN115534225A (en) | 2022-08-15 | 2022-08-15 | Quick replacement structure of mold change insert |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116494476A (en) * | 2023-06-25 | 2023-07-28 | 南昌华翔汽车内外饰件有限公司 | Injection mold and injection equipment |
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2022
- 2022-08-15 CN CN202210975473.8A patent/CN115534225A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116494476A (en) * | 2023-06-25 | 2023-07-28 | 南昌华翔汽车内外饰件有限公司 | Injection mold and injection equipment |
| CN116494476B (en) * | 2023-06-25 | 2023-09-22 | 南昌华翔汽车内外饰件有限公司 | Injection mold and injection equipment |
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