CN211994030U

CN211994030U - Adjustable ejection stroke device of injection mold

Info

Publication number: CN211994030U
Application number: CN201922461387.1U
Authority: CN
Inventors: 陈溢波; 陈建华
Original assignee: Shaoxing Shangyu Yier Plastic Industry Co ltd
Current assignee: Shaoxing Shangyu Yier Plastic Industry Co ltd
Priority date: 2019-12-31
Filing date: 2019-12-31
Publication date: 2020-11-24
Anticipated expiration: 2029-12-31

Abstract

The utility model belongs to an injection mold's drawing of patterns ejecting device. The device comprises an electromagnetic driving device, an ejection mechanism, a movable mold stripper plate, a movable mold core, a core bottom plate and a top plate guide pillar, wherein an ejection hole is formed in the core bottom plate, the shoulder edge of the core bottom plate is fixedly provided with the mold guide pillar, the movable mold stripper plate capable of moving along the mold guide pillar in the left-right direction is arranged on the right side of the core bottom plate, a local model of a plastic product is arranged on the inner edge of the top end face of the movable mold stripper plate, and when an adjustable direct-current power supply is switched on, the ejector rod and an electromagnetic coil form an electromagnet under the action of current. The ejector pin is magnetically repelled with the corresponding magnetic ejector pin, the movable mould stripper plate is continuously driven to continuously move forwards under the action of electromagnetic force until the electromagnetic force is weakened and is not enough to drive the movable mould stripper plate to continuously move forwards, and at the moment, the plastic product is ejected to a set position, so that the aim of prolonging the ejection stroke is fulfilled.

Description

Adjustable ejection stroke device of injection mold

Technical Field

The utility model belongs to an injection mold's drawing of patterns ejecting device, concretely relates to adjustable ejecting stroke device of injection mold.

Background

The maximum ejection stroke device of the conventional injection molding machine is 400mm, while the ejection stroke requirement of the injection mold of some large-sized deep-cavity plastic part products (such as plastic movable garbage cans) is more than 400mm, so technical measures are required to prolong the ejection stroke. And there are also differences in the ejection stroke required for products molded using different materials.

The prior art has two solutions of an oil cylinder ejection method and a chain pulling method; the oil cylinder ejection method is characterized in that a plurality of super-long oil cylinders are adopted to directly eject a plastic part product, and because the super-long oil cylinders are poor in mounting and fixing stability and can only be fixed on the periphery of a mold, the overall dimension of the mold is increased, and the mold is difficult to mount or even cannot be mounted on an injection molding machine; moreover, the initial stage resistance of the mold stripping is large, the starting of a plurality of oil cylinders is difficult to synchronize, the force application deviation is easily caused, the mold stripping is difficult, and even the mold is damaged by pulling. The chain pulling method is to utilize the opening stroke of the movable mould and the fixed mould, and pull the stripper plate by the chain to pull the plastic product out of the movable mould core so as to achieve the required demoulding stroke, however, the chain mechanism is easy to have mechanical failure, the reliability is not good, certain obstruction can be generated on the unloading of the plastic product, the unloading of the plastic product is labor-consuming and time-consuming, and the efficiency is low.

Heretofore, a chinese utility model patent publication No. CN200820128790.1 discloses an injection mold ejection stroke extending device. The device for prolonging the ejection stroke of the injection mold adopts the technical scheme that the ejection of an injection molding machine and the ejection relay of an oil cylinder are combined, the ejection is carried out by the injection molding machine at the initial stage of mold stripping, and when the injection molding is carried out

After the machine finishes the ejection stroke, the ejection action is continued through the relay of the oil cylinder, although the whole ejection stroke can be prolonged, the stroke cannot be adjusted, and the machine cannot be suitable for products made of different materials.

SUMMERY OF THE UTILITY MODEL

To prior art not enough, the utility model aims to provide an adjustable ejecting stroke device of injection mold, it possesses the purpose that makes whole ejecting stroke extension to can adjust the most suitable ejecting stroke to the product of different materials and reach ejecting reliable, do not harm the purpose of mould.

In order to solve the above-mentioned object, the utility model adopts the following technical scheme:

the utility model provides an adjustable ejecting stroke device of injection mold, includes electromagnetic drive device, ejection mechanism, movable mould stripper plate, movable mould core, core bottom plate and roof guide pillar, its characterized in that: the mold core comprises a mold core bottom plate and is characterized in that an ejection hole is formed in the mold core bottom plate, a mold guide pillar is fixedly arranged at the shoulder edge of the mold core bottom plate, a movable mold stripper plate capable of moving left and right along the mold guide pillar is arranged on the right side of the mold core bottom plate, a local mold of a plastic product is arranged on the inner edge of the top end face of the movable mold stripper plate, a magnetic ejection pillar and a through hole in sliding fit with the mold guide pillar are fixedly arranged on the movable mold stripper plate, a moving cavity is formed in the left side of the mold core bottom plate through a mold pin and the mold bottom plate, the mold pin is fixedly connected to the left side face of the mold core bottom plate, the mold bottom plate is fixedly installed on the left side face of the mold pin, a mold bottom plate ejection hole is formed in the mold bottom plate, one.

Preferably, the electromagnetic driving device comprises an electromagnetic coil wound on the ejection hole and an adjustable direct current power supply mounted on the lower end face of the core bottom plate, and one pole of the adjustable direct current power supply is connected with the electromagnetic coil and is connected back to the other pole of the adjustable direct current power supply through the electromagnetic coil.

Preferably, the ejection mechanism comprises a first movable die top plate and a second movable die top plate, the first movable die top plate is fixedly connected to the second movable die top plate through a screw, a stepped hole with a large opening facing left is formed in the second movable die top plate, an ejector rod is fixedly arranged on the stepped hole, and the ejection mechanism is elastically connected to the core bottom plate through a spring.

Preferably, the ejector rod is made of iron.

Preferably, the magnetic top pillar is made of a magnet.

Compared with the prior art, the utility model discloses possess following beneficial effect:

first, the ejector pin in this practicality is iron, and when there is the circular telegram coil around its periphery, the ejector pin can produce magnetism.

And secondly, when the adjustable direct current power supply is switched on, the ejector rod and the electromagnetic coil form an electromagnet under the action of current. The ejector pin is magnetically repelled with the corresponding magnetic ejector pin, the movable mould stripper plate is continuously driven to continuously move forwards under the action of electromagnetic force until the electromagnetic force is weakened and is not enough to drive the movable mould stripper plate to continuously move forwards, and at the moment, the plastic product is ejected to a set position, so that the aim of prolonging the ejection stroke is fulfilled.

The electromagnetic force can be adjusted by adjusting the direct current, so that the length of the extension stroke is adjusted.

Fourthly, in the utility model, the ejection mechanism is elastically connected to the core bottom plate through the spring, and after the product ejector pin is reset, the spring can make the ejection mechanism recover to the initial state.

Drawings

Fig. 1 is a schematic view of a cross-sectional structure of an adjustable ejection stroke device of an injection mold of the present invention;

fig. 2 is a schematic working diagram of the ejection stage of the adjustable ejection stroke device of the injection mold of the present invention;

fig. 3 is a schematic working diagram of an electromagnetic driving device of an injection mold adjustable ejection stroke device of the present invention;

in the figure: 1. the ejection mechanism comprises an ejection rod, 2, a die bottom plate, 3, a die foot, 4, an electromagnetic driving device, 41, an adjustable direct current power supply, 42, an electromagnetic coil, 5, a through hole 6, a magnetic ejection column, 7, a die guide column, 8, a movable die core, 9, a movable die stripper plate, 11, a spring, 12, a core bottom plate, 13, an ejection mechanism, 131, a first movable die top plate, 132, a second movable die top plate, 133, a screw, 134, a stepped hole, 135, an ejector rod, 14, a top plate guide column, 15, a die bottom plate ejection hole, 16 and an ejection hole.

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. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention. In the embodiment of the utility model, the section lines of different types in the drawing are not marked according to national standards, do not require the material of the element, and distinguish the section view of the element in the drawing.

Referring to fig. 1-3, an adjustable ejection stroke device of an injection mold is shown, which is an adjustable ejection stroke device composed of an electromagnetic driving device and an ejection mechanism, and controls the length of a stroke by powering on and off an electromagnetic coil, thereby achieving the purpose of stroke extension and adjustment. Specifically, an adjustable ejecting stroke device of injection mold, including electromagnetic drive device 4, ejection mechanism 13, movable mould stripper plate 9, movable mould core 8, core bottom plate 12 and roof guide pillar 14, its characterized in that: a top hole 16 is formed in the core bottom plate 12, a die guide post 7 is fixedly arranged at the shoulder edge of the core bottom plate 12, a movable die stripper plate 9 capable of moving left and right along the die guide post 7 is arranged on the right side of the core bottom plate 12, a local model of a plastic product is arranged at the inner edge of the top end face of the movable die stripper plate 9, a magnetic top column 6 and a through hole 5 in sliding fit with the die guide post 7 are fixedly arranged on the movable die stripper plate 9, the magnetic top column is made of a magnet, an electromagnetic driving device 4 is arranged on the movable die stripper plate 9, and the electromagnetic driving device 4 comprises an electromagnetic coil wound on

42 and an adjustable direct current power supply 41 arranged on the lower end surface of the core bottom plate 12, wherein one pole of the adjustable direct current power supply 41 is connected with an electromagnetic coil 42 and is connected back to the other pole of the adjustable direct current power supply 41 through the electromagnetic coil 42. The left side of the core bottom plate 12 forms a moving cavity through a mold foot 3 and a mold bottom plate 2, the mold foot 3 is fixedly connected to the left side face of the core bottom plate 12, the mold bottom plate 2 is fixedly installed on the left side face of the mold foot 3, a mold bottom plate ejection hole 15 is formed in the mold bottom plate 2, one end of a top plate guide pillar 14 located in the moving cavity is fixedly installed at the other end of the core bottom plate 12 and fixedly installed on the mold bottom plate 2, and an ejection mechanism 13 is movably arranged on the top plate guide pillar 14. The ejection mechanism 13 comprises a first movable die top plate 131 and a second movable die top plate 132, the first movable die top plate 131 is fixedly connected to the second movable die top plate 132 through a screw 133, a stepped hole 134 with a large opening facing left is formed in the second movable die top plate 132, an ejector rod 135 is fixedly arranged on the stepped hole 134, and the ejector rod 135 is made of iron. The ejector mechanism 13 is elastically connected to the core bottom plate 12 by a spring 11.

The working principle is that after the mold is opened, an ejector rod 1 of the injection molding machine pushes an ejection mechanism 13 through a through hole 5 on a mold bottom plate 2, under the guide of a top plate guide post 14, an ejector rod 135 on the ejection mechanism 13 pushes a magnetic ejector post 6, a movable mold stripper plate 9 is driven to move under the support and the guide of a mold guide post 7 to separate a plastic product from a movable mold core 8, after the ejector rod 1 of the injection molding machine finishes the ejection stroke, the adjustable direct current power supply is switched on under the control of a stroke switch, and the ejector rod 135 and an electromagnetic coil 42 form an electromagnet under the action of current I. The magnetic force of the ejector pin is repelled from the corresponding magnetic ejector pin, the movable mould stripper plate 9 is continuously driven to continuously move forwards under the action of the electromagnetic force F until the electromagnetic force is weakened and is not enough to drive the movable mould stripper plate 9 to continuously move forwards, and the plastic product is ejected to a set position at the moment, so that the aim of prolonging the ejection stroke is fulfilled.

The above description is only an embodiment of the invention, but the scope of the invention is not limited thereto, and any changes or substitutions that are not thought of through the inventive work should be included in the scope of the invention. Therefore, the protection scope of the invention should be subject to the protection scope defined by the claims.

Claims

1. The utility model provides an adjustable ejecting stroke device of injection mold, includes electromagnetic drive device (4), ejection mechanism (13), movable mould stripper plate (9), movable mould core (8), core bottom plate (12) and roof guide pillar (14), its characterized in that: the mold core bottom plate (12) is provided with an ejection hole (16), the shoulder edge part of the mold core bottom plate (12) is fixedly provided with a mold guide post (7), the right side of the mold core bottom plate (12) is provided with a movable mold stripper plate (9) capable of moving left and right along the mold guide post (7), the inner edge of the top end surface of the movable mold stripper plate (9) is provided with a local mold of a plastic product, the movable mold stripper plate (9) is fixedly provided with a magnetic ejection column (6) and a through hole (5) in sliding fit with the mold guide post (7), the left side of the mold core bottom plate (12) forms a moving cavity through a mold foot (3) and a mold bottom plate (2), the mold foot (3) is fixedly connected to the left side surface of the mold core bottom plate (12), the mold bottom plate (2) is fixedly arranged on the left side surface of the mold foot (3), the mold bottom plate (2) is provided, the ejection mechanism is characterized in that one end of the top plate guide post (14) located in the moving cavity is fixedly mounted on the mold core bottom plate (12), the other end of the top plate guide post is fixedly mounted on the mold core bottom plate (2), and the ejection mechanism is movably arranged on the top plate guide post (14).

2. The adjustable ejection stroke device of an injection mold according to claim 1, wherein: the electromagnetic driving device (4) comprises an electromagnetic coil (42) wound on the ejection hole (16) and an adjustable direct current power supply (41) installed on the lower end face of the mold core bottom plate (12), and one pole of the adjustable direct current power supply (41) is connected with the electromagnetic coil (42) and is connected back to the other pole of the adjustable direct current power supply (41) through the electromagnetic coil (42).

3. The adjustable ejection stroke device of an injection mold according to claim 1, wherein: the ejection mechanism (13) comprises a first movable die top plate (131) and a second movable die top plate (132), the first movable die top plate (131) is fixedly connected to the second movable die top plate (132) through a screw (133), a stepped hole (134) with a large opening facing left is formed in the second movable die top plate (132), an ejector rod (135) is fixedly arranged on the stepped hole (134), and the ejection mechanism (13) is elastically connected to the core bottom plate (12) through a spring (11).

4. The adjustable ejection stroke device of an injection mold according to claim 3, wherein: the ejector rod (135) is made of iron.

5. The adjustable ejection stroke device of an injection mold according to claim 1, wherein: the magnetic top column (6) is made of a magnet.