CN107457967B - Side inner barb demoulding mechanism of plastic tray injection mould - Google Patents

Abstract

A side internal barb demoulding mechanism of a plastic tray injection mould comprises an upper compound plate, a lower compound plate, a cavity arranged below the upper compound plate, mould feet arranged on the lower compound plate, an upper thimble plate, a lower thimble plate and thimbles arranged on the lower compound plate between the mould feet, a core and a side core-pulling slider arranged on a fixing plate arranged on the mould feet, wherein the side core-pulling slider is driven by a side core-pulling oil cylinder, a plastic tray is arranged between the mould feet and the cavity, a tray foot is arranged below the plastic tray, a fork opening is arranged in the tray foot, the plastic tray is arranged above the fork opening to form a grid hole, and an inner oblique guide surface and an outer oblique guide surface are arranged on the tray foot.

Description

Side inner barb demoulding mechanism of plastic tray injection mould

Technical Field

The invention relates to a plastic tray injection mold, in particular to a side inner barb demolding mechanism of the plastic tray injection mold.

Background

In the storage and logistics processes of various medical foods, plastics, chemical industry, raw materials and the like, plastic trays are generally required to be used. The plastics tray is generally square, has the dish foot under the tray body, has all opened two fork mouths on four sides of dish foot for fork truck or carrier's fork inserts from the fork mouth and lifts up the tray, and fork mouth department at the dish foot all can make inclined guide surface, and when the fork was pitched, inclined guide surface played the guide effect to the fork, prevented that the fork from bumping badly with the dish foot. The inclined angle of the inboard oblique guide surface of dish foot is done the millet cake for the convenience mould of current plastics tray, usually, is taken out the slider through the mode of taking off by force by the side, perhaps directly makes the dish foot inboard into the plane, and the plane forms the right angle with the inner wall of dish foot, and the fork inserts from a dish foot like this, will touch this right angle position when inserting out from opposite dish foot again, and the live time has been of a specified duration and has been caused the dish foot to damage easily, influences its life.

Disclosure of Invention

The invention aims to overcome the defects in the prior art and provides the side inner barb demolding mechanism of the plastic tray injection mold, which is beneficial to demolding the inner oblique guide surface of the tray foot of the plastic tray, simple in structure and smooth in demolding.

The invention discloses a technical scheme of a side edge inner barb demoulding mechanism of a plastic tray injection mould, which comprises the following steps: including last compoboard and lower compoboard, set up the die cavity under going up the compoboard, set up the mould foot on the compoboard down, set up thimble board on the lower compoboard between the mould foot, thimble board and thimble down, set up the fixed plate on the mould foot, set up core and side slider of loosing core on the fixed plate, the side slider of loosing core drives through the side hydro-cylinder that takes out, there is injection moulding's plastics tray between core and die cavity, the system has the dish foot under the plastics tray, it has the fork mouth to open in the dish foot, the plastics tray is located fork mouth top system and has the net hole, it has interior oblique guide surface and outer oblique guide surface to make on the dish foot, its characterized in that: the side slider of loosing core in open and to have oblique guide hole, set up oblique guide arm in the guide hole to one side, oblique guide arm is located the interior oblique guide surface one side system of dish foot and has vertical decurrent barb, the barb contacts with interior oblique guide surface, the another system of oblique guide arm has the connecting rod, the connecting rod is unanimous with the inclination of oblique guide arm, and the external diameter of connecting rod is less than oblique guide arm, one side that is located the connecting rod at oblique guide hole sets up the baffle, the connecting rod passes the baffle and connects spacing arm-tie, be equipped with the spring outside the connecting rod, spring one side contacts with oblique guide arm, the spring opposite side contacts with the baffle.

The invention discloses a demoulding mechanism with an inner barb at the side edge of a plastic tray injection mould, which is mainly characterized in that an inclined guide hole is arranged in a side core-pulling slider, an inclined guide rod is arranged in the inclined guide hole, one end of the inclined guide rod is provided with a barb which is vertically downward, the barb is contacted with an inner inclined guide surface of a tray foot, the other end of the inclined guide rod is provided with a connecting rod, the connecting rod passes through a baffle plate and is connected with a limiting pull plate, the connecting rod is provided with a spring at the inner side of the baffle plate, after the plastic tray is injection-moulded, a lower compound plate drives a mould foot, an upper thimble plate, a lower thimble plate, a fixed plate, a mould core, a side core-pulling slider, a side core-pulling oil cylinder and a plastic tray to move downwards together, so that a mould cavity firstly takes off grid holes on the tray foot of the plastic tray, and then the side core-pulling slider is driven by the side core-pulling oil cylinder to slide outwards, under the action of the thrust of the spring, the side core-pulling sliding block slides outwards, the inclined guide rod always props against the side wall of the mold core, and the inclined guide rod moves upwards along the inclined direction of the inclined guide hole, so that the inclined guide rod gradually and upwards separates from the inner inclined guide surface of the tray foot until the limiting pull plate is contacted with the baffle, the baffle limits the limiting pull plate to prevent the limiting pull plate from continuously moving, the limiting pull plate limits the connecting rod and the inclined guide rod, the barb also upwards separates from the inner inclined guide surface of the tray foot, finally, the side core-pulling sliding block, the inclined guide rod and the barb are driven by the side core-pulling oil cylinder to move outwards together to draw out a fork opening of the tray foot, and the upper ejector pin plate and the lower ejector pin plate drive the ejector pins to upwards eject and release the plastic tray. This scheme plastics tray injection mold side internal barb demoulding mechanism utilizes the side to loose core interior oblique guide hole of slider and oblique guide arm cooperation to one end system at oblique guide arm has perpendicular decurrent barb, and another head of oblique guide arm is through the cooperation of spacing arm-tie, baffle and spring, and the slider is loosed core to the side when the side is loosed core, makes the barb deviate from the interior oblique guide surface of dish foot, takes out the fork mouth of dish foot again together, does not occupy the time of loosing core, improves production efficiency, moreover, the steam stripping is simple, and the drawing of patterns is smooth.

The invention relates to a side-edge inner inverted hook demolding mechanism of a plastic tray injection mold, wherein a sliding rail is arranged on a fixed plate, and the lower end of a side core-pulling sliding block is matched with the sliding rail. The sliding rail is arranged, so that the side core-pulling sliding block can move left and right to play a role in guiding, the side core-pulling sliding block can slide smoothly, and the guiding is accurate.

Drawings

FIG. 1 is a schematic structural diagram of a mold closing state of a side inner barb demolding mechanism of a plastic tray injection mold of the invention;

FIG. 2 is a structural diagram of a barb ejection state of the barb demolding mechanism for the side inner barb of the plastic tray injection mold of the invention;

FIG. 3 is an enlarged view of a portion of FIG. 2 at A;

FIG. 4 is a schematic structural diagram of a barb and side core-pulling slider core-pulling state of the barb demoulding mechanism of the side inner barb of the plastic tray injection mould;

fig. 5 is a structural schematic diagram of the ejection state of the plastic tray of the barb demoulding mechanism in the side edge of the plastic tray injection mould.

Detailed Description

The invention relates to a side-edge internal barb demoulding mechanism of a plastic tray injection mould, which comprises an upper compound plate 1 and a lower compound plate 2, wherein a cavity 3 is arranged below the upper compound plate, a mould foot 4 is arranged on the lower compound plate, an upper thimble plate 5, a lower thimble plate 6 and a thimble 7 are arranged on the lower compound plate between the mould feet, a fixed plate 8 is arranged on the mould foot, a mould core 9 and a side core-pulling slider 10 are arranged on the fixed plate, the side core-pulling slider is driven by a side core-pulling oil cylinder 11, a plastic tray 12 which is formed by injection moulding is arranged between the mould core 9 and the cavity 3, a tray foot 13 is arranged below the plastic tray, a fork opening 14 is arranged in the tray foot, a grid hole 15 is arranged above the fork opening of the plastic tray foot, and an internal oblique guide surface 16 and an external oblique guide surface 17 are arranged on the tray foot 13, and is characterized in that: the side slider of loosing core 10 in open and to have oblique guide hole 18, set up oblique guide arm 19 in the oblique guide hole, the oblique guide arm is located interior oblique guide surface 16 one side system of dish foot 13 and has vertical decurrent barb 20, the barb contacts with interior oblique guide surface, the other end system of oblique guide arm 19 has connecting rod 21, the connecting rod is unanimous with the inclination of oblique guide arm, and the external diameter of connecting rod is less than oblique guide arm, one side that is located connecting rod 21 at oblique guide hole 18 sets up baffle 22, the connecting rod passes baffle connection spacing arm-tie 23, be equipped with spring 24 outside the connecting rod, spring one side contacts with oblique guide arm 19, the spring opposite side contacts with baffle 22. The main characteristic is that an inclined guide hole 18 is opened in the side core pulling slide block 10, an inclined guide rod 19 is arranged in the inclined guide hole, one end of the inclined guide rod is provided with a vertically downward barb 20, the barb is contacted with an inner inclined guide surface 16 of the tray leg 13, the other end of the inclined guide rod 19 is provided with a connecting rod 21, the connecting rod passes through a baffle 22 and is connected with a limit pull plate 23, the connecting rod 21 is provided with a spring 24 on the inner side of the baffle, after the plastic tray 12 is injection molded, the lower compound plate 2 drives the mold leg 4, the upper ejector pin plate 5, the lower ejector pin plate 6, the fixing plate 8, the mold core 9, the side core pulling slide block 10, the side core pulling oil cylinder 11 and the plastic tray 12 to move downwards, so that the mold cavity 3 firstly comes out of the grid holes 15 on the tray leg 13 of the plastic tray, then the side core pulling slide block 10 is driven by the side pulling oil cylinder 11 to slide outwards, the side core pulling slide block 10 under the thrust of the spring 24, the inclined guide rod 19 always abuts against the side wall of the mold core 9, and the inclined guide rod 19 moves upwards along the inclined guide hole 18, so that the inner inclined guide leg 13 of the inclined guide rod gradually comes out of the inclined guide rod and the upper ejector pin 19 and the baffle 16 of the side pulling slide block 13 are pulled out of the plastic tray 12, and the upper ejector pin 19 can not come out of the limit pull plate 13, and the baffle 16, and the inclined guide rod 12, and the inclined guide rod can not be pulled out of the baffle 13, at this time, the inclined pull plate 13, the inclined pull plate 12, and the inclined pull plate can not be pulled out of the inclined pull plate 12, and the inclined pull plate 13, and the inclined guide rod 19 can move downwards, and the inclined guide plate 13, and the inclined pull plate can not be pulled out of the inclined pull plate 13, and the inclined guide plate 13 can be pulled out of the inclined guide plate 13 can not be pulled out of the inclined pull plate 13, and the inclined pull plate 13. This scheme plastics tray injection mold side internal barb demoulding mechanism utilizes the cooperation of oblique guide hole 18 and oblique guide arm 19 in the side slider of loosing core 10 to one end system at oblique guide arm has perpendicular decurrent barb 20, another head of oblique guide arm is through spacing arm-tie 23, baffle 22 and spring 24's cooperation, side slider of loosing core 10 is when the side is loosed core, makes barb 20 deviate from the interior inclined guide surface 16 of dish foot 13, take out the fork mouth 14 of dish foot again together, do not occupy the time of loosing core, and the production efficiency is improved, moreover, the steam generator is simple in structure, the drawing of patterns is smooth. The fixed plate 8 is provided with a slide rail 25, and the lower end of the side core-pulling slide block 10 is matched with the slide rail. With the slide rail 25, the side core-pulling slide block 10 is guided to move left and right, so that the side core-pulling slide block slides smoothly and is guided accurately.

Claims (2)

1. Barb demoulding mechanism in plastics tray injection mold side, including compound board (1) and lower compound board (2), set up die cavity (3) under going up the compound board, set up mould foot (4) on the compound board down, set up thimble board (5) on the lower compound board between the mould foot, thimble board (6) and thimble (7) down, set up fixed plate (8) on the mould foot, set up core (9) and side slider (10) of loosing core on the fixed plate, the side slider of loosing core drives through side hydro-cylinder (11), there is injection moulding's plastics tray (12) between core (9) and die cavity (3), the system has a set foot (13) under the plastics tray, it has fork mouth (14) to open in the set foot, the plastics tray is located fork mouth top system and has net hole (15), system has interior inclined guide surface (16) and outer inclined guide surface (17) on set foot (13), its characterized in that: the side core pulling sliding block (10) is internally provided with an inclined guide hole (18), an inclined guide rod (19) is arranged in the inclined guide hole, a barb (20) which is vertically downward is arranged on one side of an inner inclined guide surface (16) of the tray foot (13) of the inclined guide rod, the barb is contacted with the inner inclined guide surface, a connecting rod (21) is arranged at the other end of the inclined guide rod (19), the inclined angle of the connecting rod is consistent with that of the inclined guide rod, the outer diameter of the connecting rod is smaller than that of the inclined guide rod, a baffle (22) is arranged on one side of the inclined guide hole (18) which is positioned on the connecting rod (21), the connecting rod penetrates through the baffle to be connected with a limiting pull plate (23), a spring (24) is arranged outside the connecting rod, one side of the spring is contacted with the inclined guide rod (19), the other side of the spring is contacted with the baffle (22), after the plastic tray (12) is injection molded, the lower compound plate (2) drives a mold foot (4), an upper ejector pin plate (5), a lower ejector pin plate (6), a fixed plate (8), a core (9), a side sliding block (10), a side core pulling oil cylinder (11) and the plastic tray (12) and the side core pulling sliding block (10) is pushed outside the side core pulling sliding cylinder (10) of the side core pulling sliding block (13) and then pushes the side core (9) outwards, and the inclined guide rod (19) moves upwards along the inclined direction of the inclined guide hole (18), so that the inclined guide rod gradually moves upwards to be separated from the inner inclined guide surface (16) of the tray foot (13) until the limiting pull plate (23) is contacted with the baffle (22), the baffle limits the limiting pull plate to prevent the limiting pull plate from moving continuously, the limiting pull plate limits the connecting rod (21) and the inclined guide rod (19), at the moment, the barb (20) also moves upwards to be separated from the inner inclined guide surface (16) of the tray foot (13), and finally the side core pulling sliding block (10), the inclined guide rod (19) and the barb (20) are driven by the side core pulling oil cylinder (11) to move outwards to pull out the fork opening (14) of the tray foot (13) together, and the upper ejector pin plate (5) and the lower ejector pin plate (6) drive the ejector pin (7) to eject the plastic tray (12) upwards for demoulding.

2. The side inner barb demolding mechanism of the plastic tray injection mold of claim 1, wherein: the fixed plate (8) is provided with a slide rail (25), and the lower end of the side core-pulling slide block (10) is matched with the slide rail.

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