CN109702963B

CN109702963B - Automatic liftout injection moulding mould of desk support frame

Info

Publication number: CN109702963B
Application number: CN201910166905.9A
Authority: CN
Inventors: 闵庆辉; 李庆龙; 王海吉
Original assignee: Wuxi Qiguan Health Technology Co ltd
Current assignee: Wuxi Qiguan Health Technology Co ltd
Priority date: 2019-03-06
Filing date: 2019-03-06
Publication date: 2021-05-25
Anticipated expiration: 2039-03-06
Also published as: CN109702963A

Abstract

The invention discloses an automatic ejection injection molding die of a table support frame, which comprises an upper die plate, a lower die plate, a top plate, ejector rods and an unloading assembly, wherein the upper die plate is arranged relative to the lower die plate in an opening and closing mode, the top plate is arranged below the lower die plate and is arranged in an up-and-down displacement mode relative to the lower die plate, the ejector rods are vertically arranged on the top plate, the top ends of the ejector rods movably penetrate through the lower die plate and extend into a cavity of the lower die plate, at least one unloading assembly is arranged on the lower die plate and the top plate, the top plate is lifted or pressed down by the unloading assembly in the opening and closing mode, after the die is opened, the top plate automatically moves upwards through the unloading assembly and ejects an injection molding piece out of the cavity, and the injection molding piece in the cavity can be automatically.

Description

Automatic liftout injection moulding mould of desk support frame

Technical Field

The invention belongs to the field of table forming molds, and particularly relates to an automatic ejection injection molding mold for a table supporting frame.

Background

As shown in fig. 1, the present bottom supporting frame of a combined plastic table is used for supporting a table top board, the processing method is injection molding, after the mold is opened, the injection molded product is ejected out by using additional instruments or manually pushing a top plate and a top rod, and the process requires manual assistance for demolding, so that the manual labor intensity is high, and the efficiency is low.

Disclosure of Invention

The purpose of the invention is as follows: in order to overcome the defects in the prior art, the invention provides an automatic ejection injection molding mold of a table support frame, which can automatically eject an injection molding part in a cavity after the mold is opened.

The technical scheme is as follows: in order to achieve the purpose, the technical scheme of the invention is as follows:

the utility model provides an automatic liftout injection moulding mould of desk support frame, includes cope match-plate pattern, lower bolster, roof, ejector pin and the subassembly of unloading, the cope match-plate pattern sets up for the die sinking mould of opening and shutting of lower bolster, the roof sets up the below at the lower bolster, just the roof sets up for the upper and lower displacement of lower bolster, be provided with a plurality of ejector pins on the roof perpendicularly, the top activity of ejector pin passes the lower bolster and stretches into in the die cavity of lower bolster, the ejector pin is hollow body of rod structure, during the die sinking the ejector pin intercommunication air pump, ejector pin sprays compressed gas in the die cavity of lower bolster, at least one the subassembly of unloading sets up on lower bolster and roof, the subassembly of unloading promotes or pushes down the roof under the die sinking, after the die sinking, the roof is through the automatic upwards displacement of the subassembly of unloading and ejecting injection molding.

Furthermore, the discharging assembly comprises a discharging guide rod and a spring resetting piece, the lower template is provided with a guide hole from top to bottom in a through mode, the discharging guide rod penetrates through the guide hole, the top end of the discharging guide rod is a free end, the bottom end of the discharging guide rod extends downwards and is arranged on the top plate, the spring resetting piece is sleeved on the discharging guide rod, one end of the spring resetting piece is connected and arranged at the bottom of the lower template, and the other end of the spring resetting piece is connected and arranged on the top plate; when the mold is opened, the spring reset piece is changed from a stretching state to a retracting state and lifts the top plate to move upwards.

Furthermore, the guide hole is a countersunk hole from top to bottom, the discharge guide rod is of a T-shaped rod body structure, the discharge guide rod comprises a limiting end with a larger diameter and a guide rod body with a smaller diameter which are integrally formed, and the limiting end is positioned in the countersunk hole of the guide hole; the limiting end is used for limiting the downward movement stroke of the discharging guide rod.

Furthermore, a first mounting groove is concavely arranged in the limiting end from top to bottom, a first magnet is arranged in the first mounting groove, a second mounting groove is concavely arranged on the bottom surface of the upper template corresponding to the first mounting groove, a second magnet is arranged in the second mounting groove, and the magnetic poles of the first magnet and the second magnet are the same.

Furthermore, at least the top surface of the lower template is arranged at the first magnet interval, or the bottom surface of the upper template is arranged at the second magnet interval.

Furthermore, the top end of the ejector rod is arranged in a closed manner, at least one air outlet hole is formed in the circumferential wall body of the ejector rod close to the top end, and the air outlet hole is communicated with the inner cavity of the ejector rod; the air pump is communicated with the rod body of which the ejector rod is positioned below the lower template.

Further, the body of rod that the ejector pin is located above the venthole is back taper cylinder structure, the position at the tip or above the tip of ejector pin conical body is seted up to the gas outlet of venthole, the lower bolster die cavity bottom surface corresponds the ejector pin and is concavely equipped with the taper hole, the taper hole agrees with the ejector pin top matching.

Has the advantages that: according to the invention, the top plate is synchronously lifted or pressed down by the unloading assembly in the opening and closing states, so that the ejector rod and the ejector rod are pressed down to the initial position during closing, the upper and lower templates are opened after injection molding is finished, and the top plate and the ejector rod move upwards under the action of the unloading assembly, thereby automatically ejecting the injection molding piece.

Drawings

FIG. 1 is an injection molded part of a prior art table support of the present invention;

FIG. 2 is a top view of the mold structure of the present invention;

FIG. 3 is a schematic view of the mold of the present invention in a half section from the A-A direction;

FIG. 4 is a schematic view of the mold of the present invention in a half section from the B-B direction;

FIG. 5 is an enlarged view of a portion C of FIG. 3 according to the present invention;

FIG. 6 is a schematic cross-sectional view of the ejector pin and lower die plate of the present invention.

Detailed Description

The present invention will be further described with reference to the accompanying drawings.

As shown in the attached drawings 2 to 5, an automatic ejection injection molding mold for a table support frame comprises an upper mold plate 1, a lower mold plate 2, a top plate 3, ejector rods 5 and unloading assemblies, wherein the upper mold plate 1 is arranged relative to the lower mold plate through a guide column 6 in an opening and closing mode, the top plate 3 is arranged below the lower mold plate 2 at intervals, the top plate 3 is arranged in an up-and-down displacement mode relative to the lower mold plate, a plurality of ejector rods 5 are vertically arranged on the top plate 3, the top ends of the ejector rods 5 movably penetrate through the lower mold plate 2 and extend into a cavity 20 of the lower mold plate, during closing, the top ends of the ejector rods do not exceed the bottom surface of the cavity 20, at least one unloading assembly is arranged on the lower mold plate 2 and the top plate 3, the unloading assembly lifts or presses down the top plate 3 in the opening and closing mode, during closing, the ejector rods 5 and the ejector rods 3 are pressed down to an initial position, after injection molding, the mold opening is completed, this process reduces artifical the participation, save time, and lifting efficiency alleviates artifical intensity of labour simultaneously. The ejector rod 5 is of a hollow rod body structure, the ejector rod 5 is communicated with an air pump 21 when the mould is opened, the ejector rod 5 sprays compressed air into a cavity 20 of the lower mould plate 2, as shown in figure 6, the top end of the ejector rod 5 is arranged in a closed mode, at least one air outlet hole 51 is formed in the circumferential wall body, close to the top end, of the ejector rod 5, the air outlet holes 51 can enable air to flow into the cavity rapidly, and the air outlet holes 51 are communicated with the inner cavity of the ejector rod 5; the air pump intercommunication sets up on the body of rod that ejector pin 5 is located the lower bolster below, and when the die sinking, lets in gas through the air pump in to the body of rod of ejector pin 5, and gaseous ejection force, automatic and quick ejecting injection molding in the die cavity forms.

The rod body of the ejector rod 5 above the air outlet hole 51 is of an inverted cone-shaped cylindrical structure, the air outlet of the air outlet hole 51 is arranged at the small end of the conical body of the ejector rod 5 or at a position above the small end, the bottom surface of the cavity of the lower template 2 is concavely provided with a conical hole 52 corresponding to the ejector rod 5, the conical hole 52 is matched and matched with the top end of the ejector rod, the top end of the ejector rod is tightly attached in the conical hole 52 during mold closing, during mold opening, the air pump 21 is firstly opened, as long as the ejector rod moves upwards, the air outlet hole 51 and the ejector rod guide hole 50 generate a gap, air overflows from the air outlet hole 50 and enters the cavity 20 after passing through the gap between the conical hole 52 and the top end of the ejector rod, the entered air is compressed between the cavity and an unextruded injection molding part to form ejecting force and eject the workpiece, and in the process, the ejector rod and the ejector rod move upwards in an auxiliary manner, the ejector rod 5 and the ejector rod guide hole 50 are arranged in a sliding mode in a clearance mode, and a sealing ring or a piston 53 is sleeved on the ejector rod.

As shown in fig. 5, the discharging assembly includes a discharging guide rod 11 and a spring resetting member 12, the lower template 2 is provided with a guide hole 10 from top to bottom, the discharging guide rod 11 is inserted into the guide hole 10, the top end of the discharging guide rod 11 is a free end, the bottom end of the discharging guide rod 11 extends downwards and is arranged on the top plate 3, the spring resetting member 12 is sleeved on the discharging guide rod 11, one end of the spring resetting member 12 is connected and arranged at the bottom of the lower template 2, and the other end of the spring resetting member is connected and arranged on the top plate 3; when the die is closed, the pressing plate moves downwards, the spring reset piece is in a stretching state, when the die is opened, the spring reset piece 12 is changed from the stretching state to the retracting state and lifts the top plate 3 to move upwards, so that the injection molding piece is ejected out, when the die is closed again, the top end of the discharging guide rod 11 is directly pressed and covered on the top end of the discharging guide rod through the upper die plate, the discharging guide rod is positioned below a parting surface, meanwhile, the top end of the ejector rod 5 moves downwards to withdraw from the die cavity 20, manual operation is not needed in the process, the top plate 3 does not need to be pulled back manually.

The guide hole 10 is a countersunk hole from top to bottom, the discharge guide rod 11 is of a T-shaped rod body structure, the discharge guide rod 11 comprises a limiting end 14 with a larger diameter and a guide rod body 15 with a smaller diameter which are integrally formed, and the limiting end 14 is positioned in the countersunk hole of the guide hole 10; the countersunk depth of the guide hole is equal to the height of the limiting end 14, the limiting end 14 limits the downward moving stroke of the discharging guide rod 11, and the top end of the ejector rod is just attached to the bottom surface of the cavity 20 when the ejector rod 5 moves downward to the right position.

As shown in fig. 3 to 5, a first mounting groove 16 is concavely provided in the limiting end 14 from top to bottom, a first magnet 13 is provided in the first mounting groove 16, a second mounting groove 17 is concavely provided in the bottom surface of the upper die plate 1 corresponding to the first mounting groove 16, the mounting grooves are all concave hole structures, magnets are embedded in the concave hole structures, the aperture of the second mounting groove 17 is equal to that of the first mounting groove 16 or smaller than the diameter of a countersunk head of a guide hole, so as to ensure that the second mounting groove 17 can be pressed on the top end of the discharging guide rod 11 when the upper die plate 1 is pressed down, so as to ensure the stable downward movement of the discharging guide rod, a second magnet 18 is provided in the second mounting groove 17, the magnetic poles of the first magnet 13 and the second magnet 18 are the same, at least the top surface of the lower die plate 2 is spaced by the first magnet 13, or the bottom surface of the upper die plate 1 is spaced by the second magnet 13, through the partial space, the first magnet and the second magnet can be prevented from contacting, and a space is reserved for the repulsive force of the two magnets to serve as a clearance position; when the mold is opened, the upper mold plate 1 moves upwards, when the displacement is small, the repulsive force between the first magnet 13 and the second magnet 18 is still large, the repulsive force is still larger than the rebound elasticity of the spring reset piece 12, the discharging guide rod 11 still keeps still motionless, when the upper mold plate continuously moves upwards until the repulsive force between the first magnet 13 and the second magnet 18 is smaller than the rebound elasticity of the spring reset piece 12, the discharging guide rod 11 moves upwards under the action of the spring reset piece 12, the top plate and the ejector rod move upwards, the ejector rod ejects the injection molding piece in the mold cavity, the ejection process is finished, the ejection process is completely automatic, manual operation can be greatly reduced, time is saved, and production efficiency is improved. The ejection process of the invention is slightly later than the die opening process of the die, so as to ensure that after the die is opened, the injection molding piece can be cooled and cooled again in the buffering time instead of being ejected out through the discharging ejector rod immediately, thus ensuring more sufficient cooling of the injection molding piece and being more beneficial to demoulding of the product.

The above description is only of the preferred embodiments of the present invention, and it should be noted that: it will be apparent to those skilled in the art that various modifications and adaptations can be made without departing from the principles of the invention and these are intended to be within the scope of the invention.

Claims

1. The utility model provides an automatic liftout injection moulding mould of desk support frame which characterized in that: comprises an upper template (1), a lower template (2), a top plate (3), a mandril (5) and a discharging component, the upper template (1) is arranged opposite to the lower template in an opening and closing mode, the top plate (3) is arranged below the lower template (2), the top plate (3) is arranged in a way of moving up and down relative to the lower template, a plurality of ejector rods (5) are vertically arranged on the top plate (3), the top end of the ejector rod (5) movably penetrates through the lower template (2) to extend into a cavity of the lower template, the ejector rod (5) is of a hollow rod body structure, the ejector rod (5) is communicated with an air pump when the mold is opened, the ejector rods (5) spray compressed gas into a cavity (20) of the lower template (2), at least one discharging component is arranged on the lower template (2) and the top plate (3), and the discharging component lifts or presses the top plate (3) in an opening and closing state; after the mold is opened, the top plate (3) automatically moves upwards through the discharging assembly and ejects out the injection molding piece;

the discharging assembly comprises a discharging guide rod (11) and a spring resetting piece (12), a guide hole (10) is formed in the lower template (2) in a penetrating mode from top to bottom, the discharging guide rod (11) penetrates through the guide hole (10), the top end of the discharging guide rod (11) is a free end, the bottom end of the discharging guide rod (11) extends downwards and is arranged on the top plate (3), the spring resetting piece (12) is sleeved on the discharging guide rod (11), one end of the spring resetting piece (12) is connected and arranged at the bottom of the lower template (2), and the other end of the spring resetting piece is connected and arranged on the top plate (3); when the die is opened, the spring reset piece (12) is changed from a stretching state to a retracting state and lifts the top plate (3) to move upwards;

the guide hole (10) is a countersunk hole from top to bottom, the discharge guide rod (11) is of a T-shaped rod body structure, the discharge guide rod (11) comprises a larger-diameter limiting end (14) and a smaller-diameter guide rod body (15) which are integrally formed, and the limiting end (14) is positioned in the countersunk hole of the guide hole (10); the limiting end (14) limits the downward moving stroke of the discharging guide rod (11);

a first mounting groove (16) is concavely formed in the limiting end (14) from top to bottom, a first magnet (13) is arranged in the first mounting groove (16), a second mounting groove (17) is concavely formed in the bottom surface of the upper template (1) corresponding to the first mounting groove (16), a second magnet (18) is arranged in the second mounting groove (17), and the magnetic poles of the first magnet (13) and the second magnet (18) are the same;

the top end of the ejector rod (5) is arranged in a closed manner, at least one air outlet hole (51) is formed in the circumferential wall body, close to the top end, of the ejector rod (5), and the air outlet hole (51) is communicated with the inner cavity of the ejector rod (5); the air pump is communicated with the rod body of the ejector rod (5) positioned below the lower template;

the body of rod that ejector pin (5) are located above venthole (51) is back taper cylinder structure, the position more than the tip at ejector pin (5) conical body is seted up to the gas outlet mouth of venthole (51), lower bolster (2) die cavity bottom surface corresponds ejector pin (5) and is concavely equipped with taper hole (52), taper hole (52) agree with the ejector pin top matching.

2. The automatic ejection injection molding mold of the table support frame as claimed in claim 1, wherein: at least the first magnet (13) is arranged at a distance from the top surface of the lower template (2), or the second magnet (18) is arranged at a distance from the bottom surface of the upper template (1).