CN110181725A - A kind of plastic mould side core-pulling ejecting mechanism and its application method - Google Patents

Abstract

The present invention proposes a kind of plastic mould side core-pulling ejecting mechanism, it is installed in cover half, the cover half includes mounting portion and type cavity portion, mounting portion is fixed on pedestal, type cavity portion is installed on mounting portion, accommodating chamber is offered in mounting portion, elastic component and ejection piece are installed in accommodating chamber, elastic component is located in accommodating chamber, and it is connected with the positioning end of ejection piece, the positioning end of ejection piece is located in accommodating chamber, it ejects end and stretches out from type cavity portion, withstand plastic part outer wall, the ejection end that dynamic model squeezes ejection piece when molding compresses elastic component, elastic component is sprung back when die sinking, make the ejection end of ejection piece by plastic part ejection device；The plastic mould side core-pulling ejecting mechanism can drive the thimble on liftout plate to eject by the folding of mold itself, match with the manufacturing process of plastic part, energy saving while does not increase process flow.

Description

A plastic mold side core-pulling ejector mechanism and its application method

technical field

The invention relates to a mold, in particular to a plastic mold side core-pulling ejector mechanism and a method for using the same.

Background technique

Plastic mold is a tool in the plastic processing industry to give plastic products a complete configuration and precise dimensions, so that the plastic in the molten state fills the cavity of the mold, and after solidification and cooling, the product is completely consistent with the shape and size of the cavity of the mold.

If the plastic part has an undercut or the plastic part shrinks greatly and wraps the core, it will cause difficulty in demoulding the plastic part, affecting the molding efficiency and molding quality of the product. The mold demoulding mechanisms in the prior art are mostly ejected by external force, which It means that the molding process of a product and the consumption of manpower and energy are increased.

Therefore, it is necessary to optimize the structure of this mold to overcome the above defects.

Contents of the invention

The purpose of the present invention is to provide a plastic mold side core-pulling ejector mechanism and its use method, so as to facilitate the demoulding of plastic parts and reduce the energy consumption in the demoulding process.

The technical scheme that the present invention adopts for solving its technical problem is:

A plastic mold side core-pulling ejector mechanism installed in a fixed mold, wherein:

The fixed mold includes a mounting part and a cavity part, the mounting part is fixed on the base, the cavity part is installed on the mounting part, a housing cavity is opened in the mounting part, and elastic parts and ejector parts are installed in the housing cavity , the elastic part is located in the housing cavity and is connected with the positioning end of the ejector. The positioning end of the ejector is located in the housing cavity. The ejector end of the mold extrudes the ejector to compress the elastic member, and the elastic member rebounds when the mold is opened, so that the ejector end of the ejector ejects the plastic part out of the mold;

The ejector includes a thimble, which is fixed in the middle of the connecting plate. The shape of the connecting plate is adapted to the receiving cavity and can move in the receiving cavity. A through hole is opened in the cavity of the fixed mold, and the thimble extends from the through hole. out, and can move together with the connecting plate;

The ejector also includes a pair of ejector plates, which are respectively fixed on both sides of the connecting plate. Notches are respectively opened on both sides of the cavity of the fixed mold, and the ejector plates protrude from the notches respectively. And can move together with the connecting plate;

The connecting plate is fixed on the outer side of the positioning plate, and the elastic member is fixed on the inner side of the positioning plate. The shape of the positioning plate is adapted to the accommodation chamber and can move in the accommodation chamber. The elastic member resists the side wall of the accommodation chamber, driving the positioning plate and the connecting plate to move;

The elastic part is a rubber pad or a spring, at least one pair of positioning steps is arranged in the accommodation cavity, the elastic part is placed between the positioning steps, the thickness of the elastic part is greater than the thickness of the positioning steps, and the width of the positioning plate is greater than the distance between the positioning steps. When the mold is closed, the edge of the positioning plate is against the positioning ladder to avoid further compression of the elastic parts. The total thickness of the connecting plate and the positioning plate is smaller than the total thickness of the housing cavity. When the mold is closed, there is a travel space between the connecting plate and the cavity of the fixed mold. ;

In order to reduce the impact of the demoulding process on the shape of the plastic part, the ejection part of the thimble is generally located at a place where the plastic part does not have high requirements on the appearance.

The method of using the plastic mold side core-pulling ejector mechanism includes:

When the mold is closed, the edge of the movable mold squeezes the ejector plate, so that the connecting plate and the positioning plate drive the elastic part to compress, and the positioning plate stops when it moves to the positioning step, and the positioning step bears part of the clamping force to prevent the elastic part from being damaged due to excessive compression , the thimble and positioning plate together with the cavity of the fixed mold constitute the inner surface of the cavity;

When the mold is opened, the movable mold is separated from the ejector plate, and the elastic member releases the clamping force, which drives the positioning plate and the connecting plate to move, so that the ejector pin and the ejector plate press against the outer wall of the plastic part, and the plastic part is ejected from the mold.

The advantages of the present invention are:

1. The plastic mold side core-pulling ejector mechanism can be driven by the opening and closing of the mold itself to eject the ejector pin on the ejector plate, which cooperates with the production process of plastic parts, saving energy consumption and not increasing the process flow;

2. The setting of the ladder can transfer the excess clamping force to the fixed mold itself, and only apply the elastic force to the rubber pad for demoulding, which prolongs the service life of the mechanism, improves the production efficiency, and improves the benefit. It has a good application Promote prospects.

Description of drawings

Fig. 1 is a schematic structural view of the plastic mold side core-pulling ejector mechanism proposed by the present invention;

Fig. 2 is a sectional view of the ejection mechanism;

Fig. 3 is a schematic diagram of the use state of the ejection mechanism.

Detailed ways

In order to make the technical means, creative features, goals and effects achieved by the present invention easy to understand, the present invention will be further elaborated below in conjunction with illustrations and specific embodiments.

As shown in Figures 1 to 3, the plastic mold side core-pulling ejector mechanism proposed by the present invention is installed in the fixed mold. The fixed mold includes a mounting part 1 and a cavity part 2, and the mounting part is fixed on the base. The cavity part is installed on the installation part, and there is an accommodation cavity in the installation part. The elastic part and the ejector part are installed in the accommodation cavity. The elastic part is located in the accommodation cavity and connected with the positioning end of the ejector part. The ejector part The positioning end of the positioning end is located in the receiving cavity, and its ejecting end protrudes from the cavity to withstand the outer wall of the plastic part. When the mold is closed, the movable mold squeezes the ejecting end of the ejecting part to compress the elastic part, and the elastic part returns when the mold is opened. The ejector end of the ejector part ejects the plastic part out of the mold; the ejector part includes an ejector pin 3, which is fixed in the middle of the connecting plate, the shape of the connecting plate is adapted to the accommodation cavity, and can move in the accommodation cavity. There is a through hole in the cavity of the fixed mold, and the thimble protrudes from the through hole, and can move together with the connecting plate; the ejector also includes an ejector plate 4, which is provided with a pair, and is fixed On both sides of the connecting plate 5, notches are respectively opened on both sides of the cavity of the fixed mold, and the ejector plates protrude from the notches respectively, and can move together with the connecting plate; the connecting plate is fixed on the outside of the positioning plate 6, and the elastic member 7. It is fixed on the inner side of the positioning plate. The shape of the positioning plate is adapted to the housing cavity and can move in the housing cavity. At least one pair of positioning steps 8 are arranged in the cavity, and the elastic member is placed between the positioning steps. The thickness of the elastic member is greater than the thickness of the positioning steps, and the width of the positioning plate is greater than the distance between the positioning steps. Positioning steps to avoid further compression of the elastic parts, the total thickness of the connecting plate and the positioning plate is less than the total thickness of the housing cavity, and there is a stroke space between the connecting plate and the cavity of the fixed mold when the mold is closed;

The method of using the plastic mold side core-pulling ejector mechanism includes:

When the mold is closed, the edge of the movable mold squeezes the ejector plate, so that the connecting plate and the positioning plate drive the elastic part to compress, and the positioning plate stops when it moves to the positioning step, and the positioning step bears part of the clamping force to prevent the elastic part from being damaged due to excessive compression , the thimble, the positioning plate and the cavity of the fixed mold together constitute the inner surface of the cavity; when the mold is opened, the movable mold is separated from the ejector plate, and the elastic part releases the clamping force, driving the positioning plate and the connecting plate to move, so that the thimble and the connecting plate move. The ejector plate presses against the outer wall of the plastic part to eject the plastic part from the mold.

The side core-pulling ejector mechanism of the plastic mold can drive the ejector pin on the ejector plate to be ejected by the opening and closing of the mold itself, which cooperates with the production process of the plastic part, saves energy and does not increase the process flow; The clamping force is transferred to the given mold itself, and only the elastic force applied to the rubber pad for demoulding prolongs the service life of the mechanism, improves production efficiency, and improves benefits, and has a good application and promotion prospect.

The above embodiments are only to illustrate the technical conception and characteristics of the present invention, and its purpose is to allow those skilled in the art to understand the content of the present invention and implement it, and cannot limit the protection scope of the present invention. All equivalent changes or modifications should fall within the protection scope of the present invention.

Claims (6)

1. a kind of plastic mould side core-pulling ejecting mechanism, is installed in cover half, it is characterised in that:

The cover half includes mounting portion and type cavity portion, and mounting portion is fixed on pedestal, and type cavity portion is installed on mounting portion, mounting portion In offer accommodating chamber, elastic component and ejection piece are installed in accommodating chamber, elastic component is located in accommodating chamber, and determines with ejection piece Position end is connected, and the positioning end of ejection piece is located in accommodating chamber, and ejection end is stretched out from type cavity portion, withstands plastic part outer wall, molds When dynamic model squeeze the ejection end of ejection piece and compress elastic component, elastic component is sprung back when die sinking, makes the ejection end of ejection piece by plastics Part ejection device.

2. a kind of plastic mould side core-pulling ejecting mechanism according to claim 1, it is characterised in that:

Ejection piece includes thimble, which is fixed in the middle part of connecting plate, and the shape of connecting plate is adapted to accommodating chamber, and can accommodated It is moved in chamber, through-hole is offered in the type cavity portion of cover half, thimble is stretched out from the through-hole, and can be moved together with connecting plate.

3. a kind of plastic mould side core-pulling ejecting mechanism according to claim 2, it is characterised in that:

Ejection piece further includes liftout plate, which is equipped with a pair, and is individually fixed in connecting plate two sides, the type cavity portion two of cover half Side offers notch respectively, and liftout plate is stretched out from notch respectively, and can move together with connecting plate.

4. a kind of plastic mould side core-pulling ejecting mechanism according to claim 2 or 3, it is characterised in that:

Connecting plate is fixed on the outside of positioning plate, and elastic component is fixed on the inside of positioning plate, and the shape of positioning plate is adapted to accommodating chamber, and It can be moved in accommodating chamber, elastic component resists accommodating chamber side wall, drives positioning plate and connecting plate mobile.

5. a kind of plastic mould side core-pulling ejecting mechanism according to claim 4, it is characterised in that:

Elastic component is rubber pad or spring, is provided at least a pair of of positioning ladder in accommodating chamber, elastic component be placed in positioning ladder it Between, the thickness of elastic component is greater than the thickness of positioning ladder, and the width of positioning plate is greater than the distance between positioning ladder, and when molding is fixed Position edges of boards edge resists positioning ladder, and elastic component is avoided further to compress, and the overall thickness of connecting plate and positioning plate is less than accommodating chamber Overall thickness, there are stroke spaces between connecting plate and the type cavity portion of cover half when molding.

6. a kind of application method of plastic mould side core-pulling ejecting mechanism according to claim 1, it is characterised in that:

When mold clamping, dynamic model edge squeezes liftout plate, and connecting plate, positioning plate is made to drive elastic component compression, and positioning plate is moved to Stop when positioning ladder, a part of clamp force is carried by positioning ladder, prevents elastic component compression is excessive from causing to damage, thimble and fixed The type cavity portion of position plate and cover half collectively forms the inner surface of type chamber；

When mold is opened, dynamic model is detached from liftout plate, and elastic component discharges clamp force, drives positioning plate and connecting plate mobile, makes thimble Plastic part outer wall is pressed with liftout plate, by plastic part ejection device.