CN212498774U - Injection mold for child lock button - Google Patents

Abstract

The utility model discloses an injection mold for a child lock button, which mainly comprises a fixed mold, a movable mold, a fixed mold core, a movable mold core and a mold cavity formed by the fixed mold, the movable mold, the fixed mold core and the movable mold core; the flow blocking cores are arranged on the movable mold core and distributed on two sides of the pouring gate; the ejection mechanism is connected to the movable mold core in a sliding manner and can slide out of the movable mold core under the action of power drive; the flow blocking core can inhibit the flow speed of the thicker part of the edge of the using surface of the product, and the using surface of the product is prevented from generating welding marks; the ejection mechanism comprises a first ejector pin and a second ejector pin; under the action of a first drive, the first ejector pin and the second ejector pin move synchronously to eject a finished product for the first time; under the action of a second drive, a second ejector pin ejects a product for the second time to realize complete demoulding of the product; the secondary ejection enables the ejection action of the whole die to be smoother, reduces the application force on the product, and avoids the stretching deformation and ejection marks of the finished product caused by overlarge stress.

Description

Injection mold for child lock button

Technical Field

The utility model relates to an injection mold field especially relates to an injection mold for child lock button.

Background

Many products on the market can increase the child lock device in order to protect children's safety at present, and the production of the child lock button mainly relies on injection moulding. The injection mold is a processing method used for batch production of parts with complex shapes, and the injection mold comprises the steps of injecting heated and melted materials into a mold cavity under high pressure, and obtaining a formed product after cooling and solidification.

A light-transmitting area is arranged at the center of the child lock button, and the material part of the character area is lightened after laser engraving, namely the center of the using surface of the child lock button is thinner, and the edge of the using surface of the child lock button is thicker; in the actual production process, when the traditional injection mold is used for injection molding, the flow velocity of the position with a thinner center is slow, and the flow velocity of the position with a thicker edge is fast, so that the use surface of the child lock button has a weld mark, and the quality is seriously influenced; meanwhile, the child lock button is small in size, and in the demolding process, demolding can be achieved normally by adopting a one-time ejection mechanism, but the length of the child lock installation part is long, so that the rib position corresponding to the injection mold is long, and only one-time ejection is adopted in the demolding process, so that the acting force exerted on the product is too large, and the product has the defect of ejection marks easily.

SUMMERY OF THE UTILITY MODEL

The utility model discloses the main technical problem who solves is: the utility model provides an injection mold for child lock button, can avoid the product to appear weld mark and ejecting mark.

In order to solve the main technical problems, the following technical scheme is adopted:

an injection mold for a child lock button comprises a fixed mold, a movable mold, a fixed mold core, a movable mold core, a flow blocking core and an ejection mechanism; the fixed die, the movable die, the fixed die core and the movable die core form a die cavity together; the fixed die is provided with a pouring pipeline; a pouring port of the pouring pipeline extends into the inner side wall of the fixed mold core; the flow blocking cores are arranged on the movable mold core and distributed on two sides of the pouring gate; the ejection mechanism is connected to the movable mold core in a sliding mode and can slide out of the movable mold core under the action of power driving.

Preferably, the ejection mechanism comprises a first ejector pin and a second ejector pin; the first thimble is over against the center of the product use surface; the second thimbles are multiple and distributed on two sides of the first thimbles in two groups.

Preferably, the end part of the first thimble far away from the movable mould core is fixed on the first moving plate; the first moving plate is fixedly connected with the third moving plate through a fixed rod; the first moving plate and the third moving plate can move under the action of first driving; a second moving plate capable of moving back and forth along the fixed rod is arranged between the third moving plate and the first moving plate; the second driving device is arranged on a third moving plate; the second driven telescopic part is fixedly connected with the second moving plate; the end part, close to the movable mold core, of the second thimble penetrates through the first moving plate, and the end part, far away from the movable mold core, of the second thimble is in contact with the second moving plate.

Preferably, the diameter of the first thimble is larger than that of the second thimble; the diameter of the second thimble is stepped; and the diameter of the end surface of the second thimble close to the movable mould core is smaller than that of the end surface close to the second moving plate.

Preferably, the choke core is fixed to the movable mold core by screws; the edge of the flow resisting core is in arc transition with the movable mould core.

Preferably, there are a plurality of said mould cavities; the movable mould is fixed on the mounting plate; the mounting plate is in driving connection with the die; and a guide post is arranged between the movable die and the fixed die.

Furthermore, the fixed die is provided with a mounting groove which can clamp a part of the pouring pipeline; the other part of the pouring pipeline is provided with a platform which is over against the movable mould; the movable mould is provided with a pressure lever which can be pressed on the platform.

Compared with the prior art, the utility model discloses be applied to the utensil of moulding plastics of child lock button and possess following advantage:

(1) the flow blocking cores are arranged on two sides of the pouring gate, the flow blocking cores can inhibit the flow speed of the thicker part of the edge of the using surface of the product, and the plastic flow direction of the using surface of the product is changed, so that the difference of the flow speeds of different positions of the using surface of the product is avoided, and the fusion welding mark is generated at the junction.

(2) The ejection mechanism comprises a first ejector pin and a second ejector pin; the first thimble is over against the center of the product use surface; the second thimbles are distributed on two sides of the first thimbles in two groups; the first ejector pin is fixed on the first moving plate, and the first moving plate is fixedly connected with the third moving plate and synchronously moves under the action of first driving; the second driving device is arranged on the third moving plate and moves along with the third moving plate; a second moving plate is arranged between the third moving plate and the first moving plate; the second driven telescopic part is fixedly connected with the second moving plate; the second thimble penetrates through the first moving plate and moves along with the movement of the second moving plate; under the action of the first drive, the second drive, the first moving plate, the second moving plate and the third moving plate move downwards, and at the moment, under the limitation of the second moving plate, the first ejector pin and the second ejector pin move synchronously to eject a finished product for the first time; under the action of a second drive, the second ejector pin moves relative to the movable mold core for the second time, so that the complete demolding of the finished product is realized; the first ejection acts simultaneously from the center and two sides of the finished product, so that the fracture of the use surface of the finished product due to uneven stress in the first ejection process is avoided, and the second ejection enables the mounting part of the finished product to be further demoulded; the ejection structure enables the ejection action of the whole die to be smoother, reduces the application force on a product, and avoids the stretching deformation and ejection marks of the finished product caused by overlarge stress.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some examples of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without inventive work.

Fig. 1 is a schematic view of an overall structure provided in an embodiment of the present invention;

fig. 2 is a bottom view of a movable mold according to an embodiment of the present invention;

fig. 3 is a top view of a fixed mold according to an embodiment of the present invention;

fig. 4 is a schematic view of an installation position structure of the choke core according to the embodiment of the present invention;

FIG. 5 is a schematic structural view of a movable mold core according to an embodiment of the present invention;

fig. 6 is a schematic structural view of a fixed mold core provided in an embodiment of the present invention;

fig. 7 is a schematic structural diagram of a pouring pipeline according to an embodiment of the present invention;

fig. 8 is a schematic structural diagram of the appearance of a product provided by an embodiment of the present invention;

fig. 9 is a schematic structural diagram of an inner wall of a product according to an embodiment of the present invention.

In the figure: 1 is a fixed die, and 11 is a fixed die core;

2, a moving die, 21, 22 and 23 are respectively a moving die, a moving die core, a flow blocking core and a pressure lever;

3, an ejection mechanism, 31, 32, 33, 34, 35, 36, 37 and 38 are respectively a first ejector pin, a second ejector pin, a first moving plate, a second moving plate, a third moving plate, a first drive, a second drive and a fixed rod;

4 is a pouring pipeline, 41 is a pouring gate, and 42 is a platform;

5 is a guide post;

6 is a mounting plate;

7 is a supporting structure;

and 8 is a mold cavity.

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 addition, all the connection relations mentioned herein do not mean that the components are directly connected, but mean that a better connection structure can be formed by adding or reducing connection accessories according to specific implementation conditions.

Referring to fig. 1-9, an injection mold for a child lock button mainly includes a fixed mold 1, a movable mold 2, a fixed mold core 11, a movable mold core 21, a flow blocking core 22, and an ejection mechanism 3; the fixed die 1 is opposite to the movable die 2, the fixed die core 11 is opposite to the movable die core 21, the movable die 2 can be close to or far away from the fixed die 1 under the action of die driving, and when the movable die 2 is close to and matched with the fixed die 1, the fixed die core 11 and the movable die core 21 form a die cavity 8; in order to ensure the stability of the relative movement of the movable mold 2 and the fixed mold 1, a guide column 5 is arranged between the movable mold 2 and the fixed mold 1; the movable mold 2 is fixed on the mounting plate 6 through a supporting structure 7; the mounting plate 6 is fixedly connected with the die in a driving way, the supporting structure 7 is two symmetrically arranged supporting plates, and two ends of each supporting plate are fixedly connected with the mounting plate 6 and the movable die 2 through welding or fasteners; in order to enable a plurality of products to be processed simultaneously and reasonably utilize the internal spaces of the movable mold 2 and the fixed mold 1, a plurality of movable mold cores 21 and a plurality of fixed mold cores 11 are arranged and correspond to one another; the fixed die 1 is provided with a mounting groove which can be clamped with a part of the pouring pipeline 4, a pouring port 41 of the pouring pipeline 4 is positioned on the side surface of the fixed die core 11 and extends into the inner wall of the fixed die core 11, and the pouring pipeline 4 is communicated with an external feeding port; since the plastic is pressurized and sent to the pouring pipe 4 and enters the mold cavity 8 through the pouring port 41, the pouring pipe 4 may shake under the action of high pressure, a platform 42 is provided on the side of the pouring pipe 4 facing the movable mold 2 by welding, the movable mold 2 is provided with a pressure lever 23 capable of pressing against the platform 42, the pressure lever 23 moves along with the movement of the movable mold 2, and after the movable mold 2 is engaged with the fixed mold 1, the pressure lever 23 presses the platform 42 to suppress the shaking of the pouring pipe 4.

In order to inhibit the use surface of the product from generating welding marks, the choke cores 22 are arranged on two sides of the pouring gate 41, the choke cores 22 can inhibit the flow speed of the thicker part of the edge of the use surface of the product, and the plastic flow direction of the use surface of the product is changed, so that the welding marks at the junction caused by the difference of the flow speeds at different positions of the use surface of the product are avoided, and the choke cores 22 and the movable mold core 21 are fastened through screws in order to facilitate the disassembly and assembly of the choke cores 22 and the replacement of the choke cores 22 with different sizes; in order to ensure the quality of the use surface of the product and the connection strength of the choke core 22, the choke core 22 is an integrally formed L-shaped structure; in order to prevent plastic from entering due to an excessively large gap between the choke core 22 and the movable mold core 21, the edge of the choke core 22 is arc-transitioned with the movable mold core 21.

The ejection mechanism 3 includes a first ejector pin 31 and a second ejector pin 32; the first thimble 31 is over against the center of the product use surface; the second needles 32 are divided into two groups and distributed on two sides of the first needle 31, that is, the second needles 32 face two sides of the product use surface, the end surface diameter of the second needles 32 is smaller than that of the first needles 31, and the axial length of the second needles 32 is greater than that of the first needles 31.

The top of the first thimble 31 is fixed on the first moving plate 33 by welding, and the bottom of the first thimble slides and extends into the movable mold core 21; the top of the first moving plate 33 is fixedly connected with the third moving plate 35 through a fixed rod 38, the axial direction of the fixed rod 38 is perpendicular to the first moving plate 33 and the third moving plate 35, the first moving plate 33 is parallel to the third moving plate 35, and the fixed rod 38 is fixed on the first moving plate 33 and the third moving plate 35 through welding; under the action of the first drive 36, the first moving plate 33 and the third moving plate 35 linearly move back and forth towards the fixed mold 1; the first driver 36 is an oil cylinder or an air cylinder, a piston rod of the first driver 36 is fixedly connected to the third moving plate 35 through a fastener, and the first driver 36 can drive the moving plate 35 to move linearly back and forth.

A second moving plate 34 capable of moving back and forth along the axial direction of the fixed rod 38 is arranged between the first moving plate 33 and the third moving plate 35, and the fixed rod 38 acts as a guide relative to the second moving plate 34; the third moving plate 35 is further provided with a second drive 37 capable of pushing the second moving plate 34 to move, the second drive 37 is fixed on the third moving plate 35 through a fastener and moves synchronously with the movement of the third moving plate 35, the second drive 37 is an air cylinder or an oil cylinder, the end of a piston rod of the second drive 37 is vertically connected with the second moving plate 34, and the second moving plate 34 is parallel to the first moving plate 33; one end of the second thimble 32 is connected to the movable mold core 21 in a sliding manner so as to extend back and forth, and the other end contacts the side of the second moving plate 34 far away from the third moving plate 35; the second thimble 32 penetrates the first moving plate 33; under the action of the first drive 36, the second drive 37, the first moving plate 33, the second moving plate 34 and the third moving plate 35 move downwards, and at this time, under the limitation of the second moving plate 34, the first ejector pin 31 and the second ejector pin 32 move synchronously to eject the finished product for the first time; under the action of a second drive 37, the second ejector pin 32 moves for the second time relative to the movable mold core 21, so that the finished product is ejected for the second time; the first ejection acts simultaneously from the center and two sides of the finished product, so that the fracture of the use surface of the finished product due to uneven stress in the first ejection process is avoided, and the second ejection enables the two sides of the finished product to be further demoulded; the ejection structure enables the ejection action of the whole die to be smoother, reduces the application force on a product, and avoids the stretching deformation and ejection marks of a finished product due to overlarge stress.

The ejection mechanism 3 is located inside the supporting structure 7, the mounting plate 6 is located above the third moving plate 35, the first drive 36 and the second drive 37 both penetrate through the mounting plate 6 and extend above the mounting plate 6, the second drive 37 can move up and down relative to the mounting plate 6, the first drive 36 is fixed on the mounting plate 6 through a fastener, and a piston rod of the first drive 36 is fixedly connected with the third moving plate 35.

Since the axial length of the second pin 32 itself is too long, in order to avoid the low axial strength of the second pin 32, the diameter of the second pin 32 is set to be stepped, that is, the diameter of the second pin 32 close to the second moving plate 34 is larger than the diameter of the second pin 32 inside the movable mold core 21.

The utility model discloses a working process does: the movable mold 2 moves towards the fixed mold 1 under the action of mold driving to form a mold cavity 8, and flowing plastic enters the mold cavity 8 through the pouring pipeline 4 and the pouring port 41; after the pouring is finished, cooling and forming; after molding, the movable mold 2 is far away from the fixed mold 1 under the action of mold driving, the first driving 36 acts, the first ejector pin 31 and the second ejector pin 32 simultaneously eject the finished product from the movable mold core 21, then the second driving 37 acts, the second ejector pin 32 continuously ejects the finished product from the movable mold core 21 until the mounting part of the finished product is completely far away from the movable mold core 21, and the second ejector pin 32 retracts to finish product demolding.

It should be noted that, in the present invention, "upper, lower, left, right, inner and outer" are defined based on the relative position of the components in the drawings, and are only for the clarity and convenience of describing the technical solution, it should be understood that the application of the directional terms does not limit the protection scope of the present application.

Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing embodiments, or some of the technical features may be substituted by equivalent substitutions, modifications and the like, all of which are within the spirit and principle of the present invention.

Claims (7)

1. The utility model provides an injection mold for child lock button which characterized in that: the device comprises a fixed die, a movable die, a fixed die core, a movable die core, a flow blocking core and an ejection mechanism; the fixed die, the movable die, the fixed die core and the movable die core form a die cavity together; the fixed die is provided with a pouring pipeline; a pouring port of the pouring pipeline extends into the inner side wall of the fixed mold core; the flow blocking cores are arranged on the movable mold core and distributed on two sides of the pouring gate; the ejection mechanism is connected to the movable mold core in a sliding mode and can slide out of the movable mold core under the action of power driving.

2. An injection mould for a child lock button according to claim 1, characterised in that: the ejection mechanism comprises a first ejector pin and a second ejector pin; the first thimble is over against the center of the product use surface; the second thimbles are multiple and distributed on two sides of the first thimbles in two groups.

3. An injection mould for a child lock button according to claim 2, characterised in that: the end part of the first thimble far away from the movable mould core is fixed on the first movable plate; the first moving plate is fixedly connected with the third moving plate through a fixed rod; the first moving plate and the third moving plate can move under the action of first driving; a second moving plate capable of moving back and forth along the fixed rod is arranged between the third moving plate and the first moving plate; the second driving device is arranged on the third moving plate; the second driven telescopic part is fixedly connected with the second moving plate; the end part, close to the movable mold core, of the second thimble penetrates through the first moving plate, and the end part, far away from the movable mold core, of the second thimble is in contact with the second moving plate.

4. An injection mould for a child lock button according to claim 3, wherein: the diameter of the first thimble is larger than that of the second thimble; the diameter of the second thimble is stepped; and the diameter of the end surface of the second thimble close to the movable mould core is smaller than that of the end surface close to the second moving plate.

5. An injection mould for a child lock button according to claim 1, characterised in that: the flow blocking core is fixed on the movable mold core through a screw; the edge of the flow resisting core is in arc transition with the movable mould core.

6. An injection mould for a child lock button according to claim 1, characterised in that: the number of the die cavities is multiple; the movable mould is fixed on the mounting plate; the mounting plate is in driving connection with the die; and a guide post is arranged between the movable die and the fixed die.

7. An injection mould for a child lock button according to claim 1, characterised in that: the fixed die is provided with a mounting groove which can enable a part of the pouring pipeline to be clamped; the other part of the pouring pipeline is provided with a platform which is over against the movable mould; the movable mould is provided with a pressure lever which can be pressed on the platform.

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