CN112045942A

CN112045942A - Easy-to-release injection mold with buffering effect

Info

Publication number: CN112045942A
Application number: CN202010648026.2A
Authority: CN
Inventors: 黄家军
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-07-07
Filing date: 2020-07-07
Publication date: 2020-12-08

Abstract

The invention belongs to the field of injection molding, and particularly relates to an easy-demoulding injection mold with a buffering effect, which comprises a movable mold and a fixed mold, wherein an injection molding cavity is formed between the movable mold and the fixed mold, the upper end and the lower end of the outer side wall of the fixed mold are fixedly connected with fixed blocks, the fixed mold is internally provided with buffer cavities which are arranged in a one-to-one correspondence to the fixed blocks, the buffer cavities extend into the fixed blocks, electrorheological fluid is contained in the buffer cavities, the upper end and the lower end of the inner side wall of the movable mold are fixedly connected with horizontally arranged positioning rods, one end of each positioning rod, far away from the movable mold, extends into. According to the invention, by arranging the demoulding mechanism, after the injection molding product is immobilized, the electrified piezoelectric sheet can drive the vibrating piece to vibrate, namely, the side wall of the injection molding cavity can vibrate, so that the injection molding product is conveniently separated from the injection mold, and the injection molding cavity has more vibration points, so that the injection molding product can be wholly released from the injection molding cavity, and the injection mold can be effectively prevented from being damaged.

Description

Easy-to-release injection mold with buffering effect

Technical Field

The invention belongs to the field of injection molding, and particularly relates to an easy-to-demould injection mold with a buffering effect.

Background

In the injection molding process, a driving mechanism such as a push rod motor can drive the movable mold to reciprocate in the horizontal direction, the movable mold and the fixed mold are combined together and then injection molding is carried out through the injection molding hole, and after plastic solution in the injection molding hole is cooled and solidified, the movable mold and the fixed mold are separated to be demolded.

Injection mold generally all comprises movable mould and cover half, the movable mould will merge with the cover half earlier before moulding plastics, in most traditional injection mold, driving motor can directly drive the movable mould and remove to the direction of cover half, and be hard contact between cover half and the movable mould, the contact surface between movable mould and the cover half is easy to be out of shape under the pressure effect, make the injection molding chamber take place deformation, finally can make injection moulding product's shape receive the influence, lead to product quality discrepancy, and most traditional injection mold is when carrying out the drawing of patterns, all release injection moulding product in the injection molding chamber through the stripper rod, and the action point of stripper rod on injection moulding product is only limited several departments, it takes place deformation to make injection moulding product easily at the in-process that promotes, to the injection moulding product of some relatively poor deformability, and lead to the damage of product easily.

To solve the above problems, we propose an easy-release injection mold having a cushioning effect.

Disclosure of Invention

The invention aims to solve the problem that most of traditional injection molds are easy to damage injection products in the demolding process, and provides an easy-demolding injection mold which can effectively protect the injection products and has a buffering effect.

In order to achieve the purpose, the invention adopts the following technical scheme: an easy-demoulding injection mould with buffering effect comprises a movable mould and a fixed mould, wherein an injection molding cavity is formed between the movable mould and the fixed mould, the upper end and the lower end of the outer side wall of the fixed mould are fixedly connected with fixed blocks, buffer cavities which are arranged in one-to-one correspondence with the fixed blocks are arranged in the fixed mould, the buffer cavities extend into the fixed blocks, electrorheological fluid is filled in the buffer cavities, the upper end and the lower end of the inner side wall of the movable mould are fixedly connected with positioning rods which are horizontally arranged, one ends of the positioning rods, far away from the movable mould, extend into the buffer cavities and are fixedly connected with sliding blocks, the sliding blocks are in sealing sliding connection with the inner side wall of the buffer cavities, the positioning rods are in sealing sliding connection with the fixed mould, the sliding blocks separate the buffer cavities into fixed cavities far away from one ends of, all fixed the inlaying in movable mould and the fixed block is equipped with the plate electrode of being connected with power coupling, the cushion chamber sets up between two plate electrodes, mould plastics the intracavity and be equipped with a plurality of demoulding mechanism.

In the above-mentioned easy drawing of patterns injection mold that has a cushioning effect, every the aperture size at intercommunicating pore both ends is different, the great one end in intercommunicating pore aperture is close to and moves the chamber setting, the less one end in intercommunicating pore aperture is close to and decides the chamber setting.

In the injection mold with the buffering function and easy demolding, the demolding mechanism comprises a plurality of demolding grooves formed in the inner side wall of the injection molding cavity, the notch of each demolding groove is fixedly connected with a vibrating piece, and the inner side wall of each vibrating piece is fixedly connected with a piezoelectric piece.

In the injection mold with the buffering function and easy demoulding, the vibrating sheet and the piezoelectric sheet are respectively coupled and connected with the positive electrode and the negative electrode of the power supply through leads, and the two electrode plates are both coupled and connected with the positive electrode and the negative electrode of the power supply through leads.

In foretell easy drawing of patterns injection mold with cushioning effect, every equal fixedly connected with in the intercommunicating pore rotates the fan with the perpendicular setting of intercommunicating pore axis, the equal fixedly connected with magnetic block of tip of every flabellum of rotation fan, the fixed magnetic sheet that is equipped with that inlays in the sliding block.

Compared with the prior art, the easy-demoulding injection mould with the buffering function has the advantages that:

1. according to the invention, through setting the electrorheological fluid, the viscosity of the electrorheological fluid can be changed along with the difference of the electric field intensity of the electrorheological fluid, when the electric field intensity is increased, the viscosity is increased, the closer the movable mold is to the fixed mold, the higher the electric field intensity between the two electrode plates is, the more difficult the electrorheological fluid in the fixed cavity flows to the movable cavity, the moving speed of the movable mold can be gradually reduced in the process that the movable mold is gradually close to the fixed mold, and the contact surface between the movable mold and the fixed mold can be prevented from being deformed under the action of pressure when the movable mold rapidly impacts.

2. According to the invention, two electrode plates are arranged, and according to an electric field intensity formula: and E is U/d (U is voltage, and is a fixed value here, and d is the vertical distance between the two electrode plates), the distance between the two electrode plates can be changed in the moving process of the moving die, namely d is changed, the electric field intensity between the two electrode plates can be changed along with the change of the d, and therefore the effect of adjusting the moving speed of the moving die through the distance between the moving die and the fixed die is achieved.

3. According to the invention, by arranging the demoulding mechanism, after the injection molding product is immobilized, the electrified piezoelectric sheet can drive the vibrating piece to vibrate, namely, the side wall of the injection molding cavity can vibrate, so that the injection molding product is conveniently separated from the injection mold, and the injection molding cavity has more vibration points, so that the injection molding product can be wholly released from the injection molding cavity, and the injection mold can be effectively prevented from being damaged.

4. According to the invention, the rotating fan is arranged, after an injection product is solidified, in the process that the movable mold moves away from the fixed mold, the electrorheological fluid in the buffer cavity flows to drive the rotating fan to rotate, and the magnetic blocks on the blades of the rotating fan cut the magnetic induction lines of the magnetic plate to generate current, so that the electrode plate, the piezoelectric plate and the vibrating plate are conducted with the current, a power supply is not required to be additionally used, and the energy is saved.

Drawings

FIG. 1 is a schematic structural view of an easy-release injection mold 1 with a cushioning effect according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a demolding mechanism in embodiment 1 of an easy-demolding injection mold with a buffering function provided by the invention;

FIG. 3 is a schematic view of the internal structure of a slider in embodiment 2 of an easy-release injection molding tool with a cushioning effect according to the present invention.

In the figure, a movable mould 1, a fixed mould 2, an injection mould cavity 3, a fixed block 4, a buffer cavity 5, a positioning rod 6, a sliding block 7, a fixed cavity 8, a movable cavity 9, a communicating hole 10, an electrode plate 11, a demoulding groove 12, a vibrating plate 13, a piezoelectric plate 14, a rotating fan 15, a magnetic block 16 and a magnetic plate 17 are arranged.

Detailed Description

The following examples are for illustrative purposes only and are not intended to limit the scope of the present invention.

Example 1

As shown in fig. 1-2, an easy-to-release injection mold with a buffering function comprises a movable mold 1 and a fixed mold 2, an injection cavity 3 is formed between the movable mold 1 and the fixed mold 2, and a plastic solution is injected into the injection cavity 3 through an injection hole during injection molding.

The upper end and the lower end of the outer side wall of the fixed die 2 are fixedly connected with fixed blocks 4, buffer cavities 5 which are arranged in one-to-one correspondence with the fixed blocks 4 are arranged in the fixed die 2, the buffer cavities 5 extend into the fixed blocks 4, electrorheological fluid is contained in the buffer cavities 5, the viscosity of the electrorheological fluid can change along with the difference of the electric field intensity of the electrorheological fluid, the viscosity is increased when the electric field intensity is increased, and the viscosity is reduced when the electric field intensity is reduced.

The equal fixed connection of the last lower extreme of 1 inside wall of movable mould has locating lever 6 that the level set up, and the one end that movable mould 1 was kept away from to locating lever 6 extends to and sets up and fixedly connected with sliding block 7 in buffer chamber 5, sliding block 7 and the sealed sliding connection of inside wall of buffer chamber 5, and locating lever 6 and 2 sealed sliding connection of cover half, sliding block 7 separate into with buffer chamber 5 and keep away from the fixed cavity 8 of 1 one end of movable mould and be close to the movable cavity 9 of 1 one end of movable mould.

Be equipped with the intercommunicating pore 10 of a plurality of intercommunication stator cavities 8 and movable chamber 9 on the sliding block 7, it is worth mentioning that, the aperture variation in size at a plurality of intercommunicating pore 10 both ends, the great one end in intercommunicating pore 10 aperture is close to movable chamber 9 and sets up, the less one end in intercommunicating pore 10 aperture is close to stator cavity 8 and sets up, when sliding block 7 moves to movable chamber 9 direction, the electrorheological fluids in the movable chamber 9 flows in stator cavity 8 easily, and when sliding block 7 moves to stator cavity 8 direction, the electrorheological fluids in stator cavity 8 is difficult to flow in movable chamber 9, it is comparatively difficult when moving die 1 moves to stator cavity 2 promptly, then play the effect of the moving speed of slow down moving die 1, carry out effectual protection to injection mold.

Electrode plates 11 connected with a power supply in a coupling mode are fixedly embedded in the movable die 1 and the fixed block 4, the buffer cavity 5 is arranged between the two electrode plates 11, and the electric field intensity between the electrode plates 11 can affect the viscosity of the electrorheological fluid.

Be equipped with a plurality of demoulding mechanism in the injection molding chamber 3, it is concrete, demoulding mechanism is including setting up a plurality of demoulding groove 12 on 3 inside walls of injection molding chamber, the equal fixedly connected with trembler 13 of notch department in every demoulding groove 12, the inside wall fixedly connected with piezoelectric patches 14 of trembler 13, can hit when piezoelectric patches 14 circular telegram and drive trembler 13 and take place the vibration.

It should be noted that the vibrating reed 13 and the piezoelectric plate 14 are respectively coupled with the positive electrode and the negative electrode of the power supply through leads, the two electrode plates 11 are both coupled with the positive electrode and the negative electrode of the power supply through leads, the power supply is always conducted with the two electrode plates 11, and when the movable mold 1 is far away from the fixed mold 2, the power supply is conducted with the vibrating reed 13 and the piezoelectric plate 14.

The invention can be illustrated by the following operating modes:

when the injection mold is used, the movable mold 1 can move towards the fixed mold 2 before injection, the movable mold 1 can drive the sliding block 7 to slide towards the fixed cavity 8 through the positioning rod 6, and as the end with the smaller aperture of the communicating hole 10 is arranged close to the fixed cavity 8, the electrorheological fluid in the fixed cavity 8 is difficult to flow into the movable cavity 9, namely the movable mold 1 is difficult to move towards the fixed mold 2, so that the effect of slowing down the moving speed of the movable mold 1 is achieved, severe impact between the movable mold 1 and the fixed mold 2 is avoided, and the injection mold is effectively protected.

In the process that the movable die 1 moves towards the fixed die 2, the distance between the two electrode plates 11 is changed according to the formula of the electric field intensity: when d decreases, the electric field strength E increases, U/d (U is a voltage, which is a fixed value here, and d is a vertical distance between the two electrode plates 11).

And the viscosity of the electrorheological fluid can change along with the difference of the electric field intensity of the electrorheological fluid, the viscosity is increased when the electric field intensity is increased, the viscosity is reduced when the electric field intensity is reduced, the electrorheological fluid is more difficult to flow in the communicating hole 10 in the process that the movable die 1 gradually approaches the fixed die 2, the moving speed of the movable die 1 can be gradually reduced, the movable die 1 can be prevented from quickly impacting on the fixed die 2 to enable the contact surface between the movable die 1 and the fixed die 2 to deform under the action of pressure, and the injection mold can be further effectively protected.

After the injection molding product is solidified, the movable mold 1 moves towards the direction away from the fixed mold 2, the vibrating piece 13 and the piezoelectric piece 14 are electrified to vibrate, namely, the side wall of the injection molding cavity 3 vibrates, so that the injection molding product is separated from the injection mold, more vibration points are arranged in the injection molding cavity 3, the injection molding product can be integrally separated from the injection molding cavity 3, and the injection mold can be effectively prevented from being damaged.

Example 2

As shown in fig. 3, the present embodiment is different from embodiment 1 in that: a rotating fan 15 which is perpendicular to the axis of the communicating hole 10 is fixedly connected in each communicating hole 10, a magnetic block 16 is fixedly connected at the end part of each fan blade of the rotating fan 15, and a magnetic plate 17 is fixedly embedded in the sliding block 7.

In this embodiment, after the injection molding product is cured, in the process that the movable mold 1 moves in the direction away from the fixed mold 3, the electrorheological fluid in the buffer cavity 5 flows to drive the rotating fan 15 to rotate, and the magnetic block 16 on the fan blade of the rotating fan 15 cuts the magnetic induction line of the magnetic plate 17 to generate current, so that the electrode plate 11, the piezoelectric plate 14 and the vibrating plate 13 conduct current, and no additional power supply is needed, thereby saving energy.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims

1. The utility model provides an easy demoulding injection mould with cushioning effect, includes movable mould (1) and cover half (2), its characterized in that, form between movable mould (1) and the cover half (2) and mould the chamber (3) of moulding plastics, the equal fixedly connected with fixed block (4) of the last lower extreme of cover half (2) lateral wall, be equipped with in the cover half (2) with buffer chamber (5) that fixed block (4) one-to-one set up, buffer chamber (5) extend to set up in fixed block (4), contain electrorheological fluids in buffer chamber (5), the equal fixedly connected with locating lever (6) of horizontal setting of the last lower extreme of movable mould (1) inside wall, the one end that the movable mould (1) was kept away from to locating lever (6) extends to and sets up and fixedly connected with sliding block (7) in buffer chamber (5), sliding block (7) and the inside wall sealing sliding connection of buffer chamber (5), locating lever (6) and cover half (2) sealed sliding connection, sliding block (7) separate into with cushion chamber (5) and keep away from fixed chamber (8) of movable mould (1) one end and be close to movable chamber (9) of movable mould (1) one end, be equipped with intercommunicating pore (10) of a plurality of intercommunications fixed chamber (8) and movable chamber (9) on sliding block (7), all fixed embedding is equipped with plate electrode (11) of being connected with power coupling in movable mould (1) and fixed block (4), cushion chamber (5) set up between two plate electrode (11), be equipped with a plurality of demoulding mechanism in injection moulding chamber (3).

2. The easy-release injection mold with a cushioning effect according to claim 1, wherein the hole diameters of both ends of each communication hole (10) are different, the end with the larger hole diameter of the communication hole (10) is disposed near the movable cavity (9), and the end with the smaller hole diameter of the communication hole (10) is disposed near the fixed cavity (8).

3. The easy-to-release injection mold with buffering function according to claim 2, wherein the demolding mechanism comprises a plurality of demolding grooves (12) arranged on the inner side wall of the injection molding cavity (3), a vibration plate (13) is fixedly connected to the notch of each demolding groove (12), and a piezoelectric plate (14) is fixedly connected to the inner side wall of the vibration plate (13).

4. The easy-to-release injection mold with buffering function according to claim 3, wherein the vibrating plate (13) and the piezoelectric plate (14) are coupled to the positive and negative electrodes of the power supply respectively through wires, and both of the electrode plates (11) are coupled to the positive and negative electrodes of the power supply through wires.

5. The easy-to-release injection mold with the buffering function according to claim 3, wherein a rotating fan (15) perpendicular to the axis of the communicating hole (10) is fixedly connected in each communicating hole (10), a magnetic block (16) is fixedly connected to the end of each fan blade of the rotating fan (15), and a magnetic plate (17) is fixedly embedded in the sliding block (7).