CN210880707U

CN210880707U - Ejection mechanism for injection mold

Info

Publication number: CN210880707U
Application number: CN201921618697.3U
Authority: CN
Inventors: 郑婚连
Original assignee: Dongying Wanlong Precision Casting Metal Co ltd
Current assignee: Dongying Wanlong Precision Casting Metal Co ltd
Priority date: 2019-09-26
Filing date: 2019-09-26
Publication date: 2020-06-30
Anticipated expiration: 2029-09-26

Abstract

The utility model discloses an ejection mechanism for injection mold, the die comprises a die body, the mold core has been seted up on the mould body, the upper end of mould body sets up the outside turn-ups of vertical extension, the spout has been seted up to the lower extreme of mould body, it has the movable plate to slide in the spout, the runner with the interior intercommunication of mold core is seted up to the interior roof of spout, the last lateral wall of movable plate is fixed with the thimble that is located the runner, the both ends of movable plate are located the externally fixed lifter plate that has vertical setting of mould body, the turn-ups setting is run through to the upper end of lifter plate, all be equipped with coupling mechanism between turn-ups lower lateral wall and two lifter plates. The utility model discloses a gear one realizes the slow lift of the comparatively slow rotation of gear two and lifter plate with the meshing of gear two, and the rotation through the cam simultaneously realizes that the hammer constantly strikes with the mould outer wall, makes the junction of work piece and mold core break away from with higher speed, and the thimble of being convenient for is with work piece jack-up.

Description

Ejection mechanism for injection mold

Technical Field

The utility model relates to the technical field of mold, especially, relate to an ejection mechanism for injection mold.

Background

A mold is a tool used to shape an article, the tool being made up of various parts, different molds being made up of different parts. The method realizes the processing of the shape of an article mainly through the change of the physical state of a formed material, and a formed workpiece is positioned in a die core.

The ejection structure of the injection mold means that a product is cooled and solidified in the mold and then is opened, the product wraps one side of the mold and needs to be taken down from the mold, the traditional ejection mechanism is generally carried out only through lifting and resetting of an ejector pin, a workpiece is not easy to be separated from a mold core, and the workpiece is easy to be damaged.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the problem in the background art, and the ejection mechanism for injection mold who proposes.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

an ejection mechanism for an injection mold comprises a mold body, wherein a mold core is arranged on the mold body, a flanging which extends outwards vertically is arranged at the upper end of the mold body, a sliding groove is arranged at the lower end of the mold body, a moving plate slides in the sliding groove, a flow channel communicated with the interior of the mold core is arranged on the inner top wall of the sliding groove, an ejector pin positioned in the flow channel is fixed on the upper side wall of the moving plate, a vertically arranged lifting plate is fixed at the outer part of the mold body at the two ends of the moving plate, the upper end of the lifting plate penetrates through the flanging to be arranged, a connecting mechanism is arranged between the lower side wall of the flanging and the two lifting plates and comprises a connecting rod and a fixed rod which are fixed on the lower side wall of the flanging, a motor is fixed at the lower end of the connecting rod, a cam and a first gear are sequentially fixed at the driving end of the motor, the first gear is meshed with the second gear, sawteeth meshed with the second gear are arranged on one side, close to the second gear, of the lifting plate, rotating rods located between the cam and the outer wall of the die body are rotatably connected to the lower side wall of the flanging, and a hammer is fixed to the lower end of each rotating rod.

Preferably, a plurality of guide rods are fixed between the inner top wall and the inner bottom wall of the sliding groove, and the moving plate is slidably sleeved on the outer walls of the guide rods.

Preferably, the diameter of the first gear is far smaller than that of the second gear.

Preferably, a telescopic spring is fixedly connected between each rotating rod and the outer wall of the die body.

Preferably, the connecting rod is disposed in parallel with the fixing rod.

Compared with the prior art, this an ejection mechanism for injection mold's advantage lies in:

1. the motor drives the first gear and the cam to rotate, the first gear and the second gear are meshed to drive the gears to rotate, and then the lifting plate is driven to lift through meshing between the gears and the sawteeth, so that the first gear is small in diameter, the second gear rotates slowly, and meanwhile, the lifting plate moves slowly, and the problem that the ejector rod is rapidly ejected out due to the fact that the lifting plate moves too fast to cause workpiece damage is solved;

2. the first gear and the cam rotate together, when the cam rotates, the outer wall of the cam extrudes the hammer to impact the outer wall of the die body, the workpiece is quickly separated from the inner wall of the die core through the vibration of the die, and the workpiece can be ejected through the ejection of the ejector pin;

to sum up, the utility model discloses a gear one realizes the slow lift of the comparatively slow rotation of gear two and lifter plate with the meshing of gear two, realizes simultaneously through the rotation of cam that the hammer constantly strikes with the mould outer wall, makes the junction of work piece and mold core break away from with higher speed, and the thimble of being convenient for is with work piece jack-up.

Drawings

Fig. 1 is a schematic structural diagram of an ejection mechanism for an injection mold according to the present invention;

fig. 2 is a partial side view of an ejection mechanism for an injection mold according to the present invention.

In the figure: 1 mould body, 2 mould cores, 3 flanging, 4 moving plates, 5 ejector pins, 6 lifting plates, 7 sawteeth, 8 connecting rods, 9 gear I, 10 cams, 11 fixing rods, 12 gear II, 13 guide rods, 14 hammers, 15 expansion springs and 16 chutes.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.

Referring to fig. 1-2, an ejection mechanism for an injection mold comprises a mold body 1, a mold core 2 is arranged on the mold body 1, a vertically extending outward flange 3 is arranged at the upper end of the mold body 1, a sliding groove 16 is arranged at the lower end of the mold body 1, a moving plate 4 slides in the sliding groove 16, a plurality of guide rods 13 are fixed between an inner top wall and an inner bottom wall of the sliding groove 16, the moving plate 4 is slidably sleeved on the outer walls of the guide rods 13, and the moving plate 4 is sleeved on the outer walls of the guide rods 13 to slide, so that the moving plate 4 is ensured to move up and down stably.

A runner communicated with the inside of the mold core 2 is arranged on the inner top wall of the chute 16, an ejector pin 5 positioned in the runner is fixed on the upper side wall of the movable plate 4, lifting plates 6 which are vertically arranged are fixed at the two ends of the movable plate 4 and positioned outside the mold body 1, the upper end of each lifting plate 6 penetrates through the corresponding flange 3, a connecting mechanism is arranged between the lower side wall of each flange 3 and each lifting plate 6 and comprises a connecting rod 8 and a fixing rod 11 which are fixed on the lower side wall of each flange 3, the connecting rods 8 are arranged in parallel with the fixing rods 11, a motor is fixed at the lower end of each connecting rod 8, a cam 10 and a first gear 9 are sequentially fixed at the driving end of the motor, a second gear 12 positioned between the first gear 9 and the lifting plates 6 is installed at the lower end of each fixing rod 11, the first gear 9 is meshed with the second gear 12, the diameter of the first gear 9 is far smaller than that of the second gear, because the diameter of the first gear 9 is smaller, namely the first gear 9 rotates for a plurality of circles, the second gear 12 can rotate for a circle, so that the lifting plate 6 meshed with the second gear 12 moves slowly, and the workpiece is prevented from being damaged due to the fact that the speed is too high.

The lower side wall of the flanging 3 is rotatably connected with rotating rods positioned between the cam 10 and the outer wall of the die body 1, the lower end of each rotating rod is fixedly provided with a hammer 14, an expansion spring 15 is fixedly connected between each rotating rod and the outer wall of the die body 1, the motor drives the first gear 9 to rotate and simultaneously drives the cam 10 to rotate, when the longer end of the cam 10 is rotated to be in contact with the hammer 14, the hammer 14 is extruded to impact the outer wall of the die body 1, when the longer end of the cam 10 is rotated away from the hammer 14, under the reverse elasticity of the expansion spring 15 and the gravity action of the hammer 14, the hammer 14 moves back, the die body 1 is vibrated through the impact of the hammer 14 with the die body 1, the workpiece is rapidly separated from the inner wall of the die core 2 through the vibration of the die, and then the ejector pin 5 is driven to move upwards through the upward movement of the lifting plate 6, so that the workpiece can be ejected.

Further, unless otherwise specifically stated or limited, the above-described fixed connection is to be understood in a broad sense, and may be, for example, welded, glued, or integrally formed as is conventional in the art.

Now, the operation principle of the present invention is explained as follows:

when the workpiece is ejected, a motor is started, the motor drives the first gear 9 and the cam 10 to rotate, the second gear 12 is driven to rotate through meshing between the first gear 9 and the second gear 12, the lifting plate 6 is driven to lift through meshing between the second gear 12 and the sawteeth 7, the diameter of the first gear 9 is small, namely the first gear 9 rotates for multiple circles, the second gear 12 can rotate for one circle, the ejector pin 5 can eject the workpiece upwards after the cam 10 rotates for multiple circles, when the cam 10 rotates, the outer wall of the cam 10 extrudes the hammer 14 to impact the outer wall of the die body 1, the workpiece is quickly separated from the inner wall of the die core 2 through vibration of the die, and the workpiece can be ejected through ejection of the ejector pin 5.

The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.

Claims

1. The ejection mechanism for the injection mold comprises a mold body (1) and is characterized in that a mold core (2) is arranged on the mold body (1), a flanging (3) which extends outwards vertically is arranged at the upper end of the mold body (1), a sliding groove (16) is arranged at the lower end of the mold body (1), a movable plate (4) is arranged in the sliding groove (16) in a sliding manner, a flow passage communicated with the mold core (2) is arranged on the inner top wall of the sliding groove (16), an ejector pin (5) positioned in the flow passage is fixed on the upper side wall of the movable plate (4), a vertically arranged lifting plate (6) is fixed at the two ends of the movable plate (4) positioned outside the mold body (1), the upper end of the lifting plate (6) penetrates through the flanging (3), and a connecting mechanism is arranged between the lower side wall of the flanging (3) and the two lifting plates (6), coupling mechanism is including fixing connecting rod (8) and dead lever (11) at turn-ups (3) lower wall, the lower extreme of connecting rod (8) is fixed with the motor, the drive end of motor is fixed with cam (10) and gear (9) in proper order, gear two (12) between gear (9) and lifter plate (6) are installed to the lower extreme of dead lever (11), gear (9) and gear two (12) mesh mutually, one side that lifter plate (6) are close to gear two (12) is equipped with sawtooth (7) with gear two (12) mesh mutually, the lower side wall of turn-ups (3) rotates and is connected with the bull stick that is located between cam (10) and mould body (1) outer wall, every the lower extreme of bull stick all is fixed with and hits hammer (14).

2. An ejection mechanism for an injection mold according to claim 1, wherein a plurality of guide rods (13) are fixed between the inner top wall and the inner bottom wall of the sliding groove (16), and the moving plate (4) is slidably fitted over the outer walls of the plurality of guide rods (13).

3. An ejection mechanism for an injection mold according to claim 1, wherein the diameter of the first gear (9) is much smaller than the diameter of the second gear (12).

4. An ejection mechanism for an injection mold according to claim 1, characterized in that a telescopic spring (15) is fixedly connected between each rotating rod and the outer wall of the mold body (1).

5. An ejection mechanism for an injection mold according to claim 1, characterized in that the connecting rod (8) is arranged in parallel with the fixing rod (11).