CN220052685U - Spring bending pin and sliding block combined upper side and lower side core pulling mechanism of automobile threshold injection mold - Google Patents

Abstract

The upper side core pulling mechanism and the lower side core pulling mechanism are combined by a spring bent pin sliding block of an automobile threshold injection mold, the upper side core pulling mechanism comprises an upper compound plate and a lower compound plate, an upper base plate is arranged below the upper compound plate, a cavity is arranged below the upper base plate, a mold foot, an upper ejector plate, a lower ejector plate and ejector pins are arranged on the lower compound plate, a core is arranged on the mold foot, an inclined guide pillar is arranged below the upper compound plate, a secondary mold opening distance control device is arranged between the upper compound plate and the cavity, an outer side core pulling sliding block is arranged on the core, a delay inclined guide hole, a middle sliding groove and an upper sliding groove and a lower sliding groove are formed in the outer side core pulling sliding block, an inner side core pulling sliding block and an upper bending pin and a lower bending pin are arranged in the middle sliding groove of the outer side core pulling sliding block, inclined punching holes are respectively formed in the inner side core pulling sliding block and the bending pins, the inclined guide pillar is matched with the delay inclined guide hole and the inclined punching holes, the upper core pulling sliding block and the lower core pulling sliding block are arranged in the upper sliding groove and lower sliding groove and the head of the bending pin are matched.

Description

Spring bending pin and sliding block combined upper side and lower side core pulling mechanism of automobile threshold injection mold

Technical Field

The utility model relates to an injection mold, in particular to an upper side core pulling mechanism and a lower side core pulling mechanism combined by a spring bending pin and a sliding block of an injection mold for an automobile threshold.

Background

When the plastic part is produced by adopting the injection mold, if one side of the plastic part is provided with a convex column, the outer walls of the upper side and the lower side of the convex column are provided with grooves, and the upper side and the lower side of the convex column are provided with bordures, as the bordure structure is blocked above the grooves, the core pulling mechanism cannot directly deviate from the grooves. The traditional mode is to set up the side slider of loosing core between projection and borduring, and the side slider of loosing core is made to have the lug under the slider of loosing core, and the lug cooperatees with the recess, drives the slider of loosing core of side through the hydro-cylinder, makes the lug of slider of loosing core of side break away from the recess by force under plastic material elastic force, and its shortcoming that exists is: forced core pulling and demolding can easily lead to the groove position being pulled and deformed, even the whole plastic part can be deformed and broken, and the plastic part is scrapped.

Disclosure of Invention

The utility model aims to overcome the defects of the prior art and provide the upper side and lower side core pulling mechanism which is used for smoothly demolding plastic parts and ensuring the yield of the plastic parts and is combined with the spring pin bending sliding block of the automobile threshold injection mold.

The technical scheme of the utility model is that the spring bending pin sliding block of the automobile threshold injection mold is combined with an upper side core pulling mechanism and a lower side core pulling mechanism, which comprises the following steps: the injection molding machine comprises an upper compound plate and a lower compound plate, wherein a sprue bushing is arranged in the upper compound plate, an upper base plate is arranged below the upper compound plate, a cavity is arranged below the upper base plate, a through hole is formed in the lower compound plate, a push rod of the injection molding machine is arranged below the through hole, a mold foot is arranged on the lower compound plate between the mold feet, an upper ejector plate, a lower ejector plate and a thimble are arranged on the lower compound plate, the push rod of the injection molding machine passes through the through hole to be contacted with the lower ejector plate, a core is arranged on the mold foot, an injection molded plastic piece is arranged between the core and the cavity, the thimble passes through the core to be contacted with the lower part of the plastic piece, a convex column and upper and lower side edges are formed between the convex column and the upper and lower side edges, clamping grooves are formed on the upper and lower sides of the convex column, a secondary die opening control device is arranged between the upper compound plate and the cavity, an outer core-pulling slide block is arranged on the core-pulling slide, an inner side core-pulling slide is arranged on the outer side core-pulling slide, the outer side core-pulling slide is covered Bian Xiangpei, a delay guide hole is formed in the outer side core-pulling slide block, a slide groove is arranged in the inner side of the core-pulling slide block, a slide groove is arranged in the core-pulling slide block, a slide groove is matched with the inner side of the core-pulling slide block, and the upper side core-pulling slide block is arranged in the slide groove, and the inner side core-pulling slide block is arranged in the slide groove and the slide block is matched with the upper slide groove, and the upper side guide hole is inclined slide block and the upper side guide hole is arranged in the lower slide groove, and the slide groove is inclined slide guide hole, and the upper slide block is matched with the upper guide hole.

Further, the secondary die opening distance control device comprises a distance pulling pin, the upper head of the distance pulling pin is fixed with the upper complex plate, a pulling plate is arranged at the lower head of the distance pulling pin, a distance pulling groove is formed in the die cavity, a distance baffle is formed in the distance pulling groove, the distance pulling pin penetrates through the distance baffle, and the pulling plate is matched with the lower end of the distance baffle.

Further, the distance pulling groove is arranged above the distance baffle plate, the upper end of the spring is contacted with the upper complex plate, and the lower end of the spring is contacted with the distance baffle plate.

The spring bending pin sliding block combined upper and lower side core pulling mechanism of the automobile threshold injection mold has the beneficial effects that: after injection molding of plastic parts, the cavity is pushed to move downwards by a spring under the action of elastic force, the cavity drives the plastic parts, the core, the outer core pulling slide block, the inner core pulling slide block, the bent pins, the upper core pulling slide block, the lower core pulling slide block, the mold legs, the upper ejector pin plate, the lower ejector pin plate, the ejector pins and the lower compound plate to move downwards together, the upper compound plate, the upper base plate and the inclined guide posts keep still, so that the injection mold is opened for the first time from the upper base plate to the cavity, at the moment, the inclined guide posts are matched with the delayed inclined guide holes in the outer core pulling slide block and the inclined through holes in the side core pulling slide block and the upper and lower bent pins, and because the delayed inclined guide holes are holes with larger inner diameters (the inner diameters of the inclined guide posts are larger than the outer diameters of the inclined guide posts), the inclined guide posts do not drive the outer core pulling slide block to move when the first time is opened, and the inclined guide posts drive the inner core pulling slide block and the upper and the lower bent pins to move outwards for a small distance along the middle slide grooves, the inner core-pulling slide block is outwards separated from the convex column head of the plastic part, the bent pin is matched with inclined holes in the upper core-pulling slide block and the lower core-pulling slide block under the action of the inclined plane of the bent pin, when the bent pin moves outwards, the upper core-pulling slide block and the lower core-pulling slide block are driven to be pulled out of grooves on the convex column at the upper side and the lower side (the upper core-pulling slide block and the lower core-pulling slide block are respectively arranged at the upper part and the lower part), when a distance baffle plate in the fixed-distance pull groove is contacted with a pull plate of the distance pull pin, the cavity stops moving downwards, the injection molding machine drives the lower complex plate, the mold leg, the upper ejector plate, the lower ejector plate, the ejector pin, the core, the outer core-pulling slide block, the inner core-pulling slide block, the bent pin, the upper core-pulling slide block and the lower core-pulling slide block and the plastic part to move downwards continuously, so that the injection molding mold is opened for the second time from the cavity and the core, at the moment, the inclined guide column is contacted with the inner wall of the rear side of the delay inclined guide hole, the inclined guide pillar drives the outer core-pulling slide block to move outwards, the outer core-pulling slide block drives the inner core-pulling slide block, the bent pin and the upper and lower core-pulling slide blocks for completing core pulling to move outwards, so that the outer core-pulling slide block is completely separated from the convex pillar of the side wall of the plastic part and the edge covering structures on the upper and lower sides, and finally, the ejector rod of the injection molding machine pushes the upper ejector pin plate, the lower ejector pin plate and the ejector pin to eject and demould the plastic part with the core pulling completed upwards. According to the injection mold of the automobile threshold injection mold, the upper side core pulling mechanism and the lower side core pulling mechanism are combined, the mold is opened at the upper base plate and the mold cavity for the first time, the outer side core pulling slide block is kept motionless by utilizing the delayed inclined guide hole matching of the inclined guide pillar and the outer side core pulling slide block, the inclined guide pillar is matched with the inner side core pulling slide block and the inclined through hole of the bent pin, the bent pin is matched with the upper and lower core pulling slide block, the groove on the plastic part convex column is firstly extracted, the mold is opened for the second time, the inclined guide pillar drives the outer side core pulling slide block, the inner side core pulling slide block, the bent pin and the upper and lower core pulling slide block to outwards together, the mold is released in a forced demolding mode, the core pulling structure can be smoothly released, the plastic part is complete in structure, and the high yield of the plastic part is guaranteed.

Drawings

FIG. 1 is a schematic diagram showing a die assembly state of a spring, bent pin and slide block combined upper and lower core pulling mechanisms of an automobile threshold injection mold;

FIG. 2 is a schematic diagram of a first mold opening state structure of a spring, bent pin and slide block combined upper and lower core pulling mechanisms of an automobile threshold injection mold;

FIG. 3 is a schematic diagram of a second mold opening state of the automobile threshold injection mold with a spring pin slider combined with an upper and lower core pulling mechanism;

FIG. 4 is a schematic view of the structure in which the outer pin, the inner core-pulling slider, and the upper and lower core-pulling sliders are provided in the outer core-pulling slider;

FIG. 5 is a schematic view of a plastic part with a projection and upper and lower side edges.

Description of the embodiments

The utility model relates to a spring bending pin sliding block combined upper and lower side core pulling mechanism of an automobile threshold injection mold, as shown in figures 1-5, comprising an upper clad plate 1 and a lower clad plate 2, wherein a sprue bushing 3 is arranged in the upper clad plate, an upper base plate 4 is arranged below the upper clad plate, the upper base plate is fixed with the upper clad plate through a fastener, a cavity 5 is arranged below the upper base plate, a through hole 6 is formed in the lower clad plate 2, a push rod 11 of an injection molding machine is arranged below the through hole, a mold foot 7 is arranged on the lower clad plate, an upper ejector plate 8, a lower ejector plate 9 and an ejector pin 10 are arranged on the lower clad plate between the mold feet, the push rod 11 of the injection molding machine passes through the through hole 6 to be contacted with the lower ejector plate 9, a core 12 is arranged on the mold foot 7, an injection molded plastic part 13 is arranged between the core 12 and the cavity 5, a convex column 14 and upper side wrapping edges 15 and lower side wrapping edges are arranged on one side of the plastic part 13, a groove 16 is formed between the convex column and the upper side edges and the lower side wrapping edges, clamping grooves 17 are formed in the upper side and the lower side of the convex column, an inclined guide post 18 is arranged under the upper compound plate 1, a secondary die opening distance control device is arranged between the upper compound plate 1 and the die cavity 5, an outer side core pulling slide block 19 is arranged on the die core 12, the outer side core pulling slide block is matched with the upper side and the lower side wrapping edges 15 of the plastic piece 13, a delay inclined guide hole 20, a middle slide groove 21 and an upper slide groove 22 are formed in the outer side core pulling slide block, an inner side core pulling slide block 23 and an upper curved pin 24 and a lower curved pin 24 are arranged in the middle slide groove 21 of the outer side core pulling slide block 19, the inner side core pulling slide block is matched with the head of the convex column 14, the curved pin 24 is fixed with the inner side core pulling slide block 23 through a fastener, inclined through holes 25 are respectively formed in the inner side core pulling slide block 23 and the curved pin 24, the inclined guide post 18 is matched with the delay inclined guide hole 20 and the inclined through holes 25, an upper and lower core pulling slide block 26 is arranged at the head of the curved pin 24 in the upper slide groove 22 and the lower slide groove 22, the bent pins 24 are matched with upper and lower core-pulling sliding blocks 26 which are matched with grooves 16 on the convex columns 14.

Further, the secondary die opening distance control device comprises a distance pulling pin 31, the upper head of the distance pulling pin is fixed with the upper compound plate 1, a pulling plate 32 is arranged at the lower head of the distance pulling pin, a distance pulling groove 33 is arranged in the die cavity 5, a distance baffle 34 is arranged in the distance pulling groove, the distance pulling pin penetrates through the distance baffle, and the pulling plate 32 is matched with the lower end of the distance baffle 34.

Further, a spring 35 is arranged above the distance baffle 34 in the distance slot 33, the upper end of the spring contacts with the upper complex plate 1, and the lower end of the spring contacts with the distance baffle 34.

The spring bending pin sliding block combined upper and lower side core pulling mechanism of the automobile threshold injection mold has the beneficial effects that: after the plastic part 13 is injection molded, the cavity is pushed to move downwards by the spring 35 under the action of elastic force, the cavity drives the plastic part 13, the core 12, the outer core pulling slide block 19, the inner core pulling slide block 23, the bent pin 24, the upper core pulling slide block 26, the lower core pulling slide block 7, the upper ejector plate 8, the lower ejector plate 9, the ejector pins 10 and the lower compound plate 2 to move downwards together, the upper compound plate 1, the upper base plate 4 and the inclined guide post 18 keep still, so that the injection mold is opened for the first time from the upper base plate 4 and the cavity 5, at the moment, the inclined guide post 18 is matched with the delay inclined guide hole 20 in the outer core pulling slide block 19 and the inclined through holes 25 in the side core pulling slide block 23 and the upper and lower bent pins 24, and because the delay inclined guide hole 20 is a hole with larger inner diameter (the inner diameter is larger than the outer diameter of the inclined guide post), the inclined guide post is not driven to move by the inclined guide post 19 during the first mold opening, the oblique guide post drives the inner core-pulling slide block 23 and the upper and lower curved pins 24 to move a small distance outwards along the middle sliding groove 21, the inner core-pulling slide block is outwards separated from the head of the convex column 14 of the plastic part 13, the curved pins 24 are matched with the oblique holes in the upper and lower core-pulling slide blocks 26 under the action of the oblique surfaces of the curved pins, when the curved pins move outwards, the upper and lower core-pulling slide blocks 26 are driven to draw out the grooves 16 (the upper and lower core-pulling slide blocks are two, the upper part is the upper core-pulling slide block, the lower part is the lower core-pulling slide block, the lower core-pulling slide block) on the convex column 14, when the distance baffle 34 in the fixed-distance pulling groove 33 is contacted with the pulling plate 32 of the distance pulling pin 31, the cavity stops moving downwards, and the injection molding machine drives the lower compound plate 2, the mold legs 7, the upper ejector plate 8, the lower ejector plate 9, the ejector pins 10, the core 12, the outer core-pulling slide block 19, the inner core-pulling slide block 23, the curved pins 24, the upper and lower core-pulling slide blocks 26 and the plastic part 13 continue to move downwards, so that the injection mold is opened for the second time from the cavity 5 and the core 12, at the moment, the inclined guide pillar 18 contacts with the rear side inner wall of the time-delay inclined guide hole 20, the inclined guide pillar drives the outer core-pulling slide block 19 to move outwards, the outer core-pulling slide block drives the inner core-pulling slide block 23, the bent pin 24 and the upper and lower core-pulling slide blocks 26 for completing core pulling to move outwards, the inner core-pulling slide block is completely separated from the convex pillar 14 of the side wall of the plastic part 13 and the upper and lower side edge-covering 15 structures, and finally the ejector rod 11 of the injection molding machine pushes the upper and lower ejector pin plates 8 and 9 and the ejector pin 10 to eject and demould the plastic part 13 which completes core pulling upwards. According to the injection mold of the automobile threshold injection mold spring bent pin sliding block combined upper and lower side core pulling mechanism, through opening the mold at the upper base plate 4 and the cavity 5 for the first time, the outer side core pulling sliding block is kept motionless by utilizing the time delay inclined guide hole 20 cooperation of the inclined guide pillar 18 and the outer side core pulling sliding block 19, meanwhile, the inclined guide pillar is matched with the inner side core pulling sliding block 23 and the inclined through hole 25 of the bent pin 24, the bent pin 24 is matched with the upper and lower core pulling sliding block 26, the groove 16 on the convex column 14 of the plastic piece 13 is firstly pulled out, and then the inclined guide pillar 18 drives the outer side core pulling sliding block 19, the inner side core pulling sliding block 23, the bent pin 24 and the upper and lower core pulling sliding blocks 26 to outwards through secondary mold opening, so that the adoption of a strong demolding mode is avoided, the core pulling structure can be demolded smoothly, the plastic piece is enabled to be complete in structure, and the yield of the plastic piece is guaranteed to be high.

Claims (3)

1. The utility model provides a car threshold injection mold spring curved pin slider combination upper and lower side mechanism of loosing core, including last compound board (1) and compound board down (2), set up runner bush (3) in the compound board, set up upper padding plate (4) down on the compound board, upper padding plate is fixed mutually with last compound board through the fastener, set up die cavity (5) under the upper padding plate, it has perforation (6) to open in compound board (2) down, there is ejector pin (11) of injection molding machine down to perforate, set up mould foot (7) on the compound board down, set up thimble board (8) down on the compound board between the mould foot, thimble board (9) and thimble (10), ejector pin (11) of injection molding machine pass perforation (6) and contact with thimble board (9) down, set up core (12) on mould foot (7), there is injection molding's plastic part (13) between core (12) and the die cavity (5), one side system of plastic part (13) has projection (14) and upper and lower both sides bordure (15), projection and upper and lower both sides bordure (16) form between the recess, two sides are characterized in that the system groove (17) down between the two sides of protruding side down: the upper complex plate (1) set up oblique guide pillar (18) down, set up secondary die sinking distance controlling means between upper complex plate (1) and die cavity (5), set up outside core-pulling slide block (19) on core (12), outside core-pulling slide block cooperatees with upper and lower both sides bordure (15) of working of plastics (13), it has time delay inclined guide hole (20) to make in the outside core-pulling slide block, well spout (21) and upper and lower spout (22), set up inside core-pulling slide block (23) and two curved round pins (24) about in well spout (21) of outside core-pulling slide block (19), inside core-pulling slide block cooperatees with projection (14) head, curved round pin (24) are fixed with inside core-pulling slide block (23) through the fastener, be made respectively in inside core-pulling slide block (23) and curved round pin (24) inclined perforation (25), the head of curved round pin (24) is located upper and lower spout (22) and sets up upper and lower core-pulling slide block (26), curved round pin (24) cooperatees with projection (16) about the upper and lower projection.

2. The automobile threshold injection mold spring bending pin sliding block combined upper and lower side core pulling mechanism as defined in claim 1, wherein: the secondary die opening distance control device comprises a distance pulling pin (31), wherein the upper head of the distance pulling pin is fixed with the upper compound plate (1), a pulling plate (32) is arranged at the lower head of the distance pulling pin, a distance pulling groove (33) is formed in the die cavity (5), a distance baffle (34) is formed in the distance pulling groove, the distance pulling pin penetrates through the distance baffle, and the pulling plate (32) is matched with the lower end of the distance baffle (34).

3. The automobile threshold injection mold spring bending pin sliding block combined upper and lower side core pulling mechanism as defined in claim 2, wherein: the distance pulling groove (33) is positioned above the distance baffle plate (34) and is provided with a spring (35), the upper end of the spring is contacted with the upper compound plate (1), and the lower end of the spring is contacted with the distance baffle plate (34).