CN111361100A

CN111361100A - Turbofan injection mold

Info

Publication number: CN111361100A
Application number: CN202010282452.9A
Authority: CN
Inventors: 陆建强; 沈惠良
Original assignee: Tongxiang Degongan Building Material Co ltd
Current assignee: Tongxiang Degongan Building Material Co ltd
Priority date: 2020-04-12
Filing date: 2020-04-12
Publication date: 2020-07-03

Abstract

The invention discloses a turbofan injection mold, and particularly relates to the field of injection molds, which comprises an injection bottom mold, an injection upper mold, an injection substrate, a central core substrate and an injection central core, wherein a side exhaust mechanism is arranged on the peripheral side of the injection bottom mold and provided with a side exhaust pipe, the side exhaust mechanism comprises an exhaust sliding cavity and an exhaust sliding block, the inner sides of the central core substrate and the injection central core are provided with a central core air inlet channel, the top surface of the injection central core is provided with a central core sliding cavity, and a negative pressure sliding block is arranged in the central core sliding cavity in a sliding manner. According to the invention, the side exhaust structure is arranged, the side exhaust sliding block and the side exhaust pipe are utilized to communicate the injection cavity with the outside, the material liquid flow enters the injection cavity at the beginning of injection, a large amount of gas flow in the injection cavity is discharged through the side exhaust mechanism to avoid the phenomenon of air entrainment, and the effective discharge of gas can effectively avoid the high pressure generated in the cavity to reduce the injection pressure, so that the injection effect is improved.

Description

Turbofan injection mold

Technical Field

The invention relates to the technical field of injection molds, in particular to a turbofan injection mold.

Background

The turbofan in the prior art is mostly manufactured by injection molding, that is, thermoplastic resin or other high polymer materials are injected into a cavity of an injection mold and are uniformly distributed in each pre-opened cavity, the cavity is filled to obtain the turbofan component with a specific shape and structure, and then the turbofan component is welded and connected by a combination method such as ultrasonic welding, and the like.

At present, thermoplastic resin and part high molecular polymer material have big length-diameter ratio, the material nature of viscosity height and mobility difference are in the injection, because thermoplastic resin or other high molecular polymer material mobility speed are uneven in the die cavity, there is not enough big injection pressure in the die cavity, can appear the nest gas phenomenon in the part that the terminal surface of corresponding mould is close to the die joint, thereby lead to the problem of influencing the quality of product, in addition, because its viscosity is great and the laminating degree is higher between the injection mold after thermoplastic resin and high molecular polymer material's injection moulding, easily produce the negative pressure cavity when drawing core in the drawing of patterns and lead to being difficult to the drawing of patterns, the easy damage that leads to the product of forced drawing of patterns, the defective rate improves.

It is therefore desirable to provide a turbofan injection mold that is resistant to air entrapment and easy to demold.

Disclosure of Invention

In order to overcome the above-mentioned drawbacks of the prior art, an embodiment of the present invention provides an injection mold for a turbofan, in which a side exhaust structure is provided, an injection cavity is communicated with the outside through a side exhaust slider and a side exhaust pipe, and a movable negative pressure slider is provided on a surface of an injection core.

In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a turbofan injection mold, includes the injection die block, injects the mould, injects base plate, well core base plate and injects the well core, the injection die cavity has been seted up to the inside of mould on injection die block and the injection, the injection pipe has been seted up to the inside of mould and injection base plate on the injection, the injection nozzle with injection pipe top looks UNICOM is seted up on the surface of injection base plate, week side fixed mounting of injection die block has side exhaust mechanism, week side blast pipe has been seted up to the week side of injection die block, side exhaust mechanism includes exhaust sliding chamber and exhaust slider, the tip of side blast pipe is linked together with the inside of exhaust sliding chamber, the outside and the inboard sliding connection of exhaust sliding chamber of exhaust slider, well core inlet channel has been seted up to the inboard of well core base plate and injection well core, well core sliding chamber has been seted up to the top surface of injection well core, the bottom of well core sliding chamber is linked together with well core, the negative pressure slide block is slidably mounted inside the middle core sliding cavity, the negative pressure air flow preventing channel is formed in the inner side of the negative pressure slide block, and the backing magnet is fixedly mounted on the bottom surface of the middle core sliding cavity.

In a preferred embodiment, an exhaust runner is formed inside the exhaust slider, air holes communicated with the exhaust runner are formed in the upper side and the lower side of the exhaust slider, and the other end of the exhaust runner is communicated with an inner cavity of the exhaust sliding cavity.

In a preferred embodiment, an elastic part is fixedly installed inside the exhaust sliding cavity, the elastic part is an elastic metal sheet material component, and two ends of the elastic part are fixedly connected with the inner wall of the exhaust sliding cavity and one side of the exhaust sliding block respectively.

In a preferred embodiment, the periphery of the negative pressure slide block is provided with an air hole communicated with a negative pressure preventing air channel, the other end of the negative pressure preventing air channel is communicated with the inner cavity of the central core slide cavity, and the negative pressure preventing air channel is communicated with the outer side of the central core substrate through the central core slide cavity and the central core air inlet channel.

In a preferred embodiment, the injection core is slidably sleeved inside the injection bottom mold, the top end of the injection core is located inside the injection cavity, and the core substrate is communicated with a core air inlet channel inside the injection core.

In a preferred embodiment, the negative pressure slider is a metal iron block material member, the retraction magnet is a permanent magnet member, the inner side of the injection core is provided with an anti-slip rod sliding cavity located at the bottom of the core sliding cavity, the inner side of the anti-slip rod sliding cavity is slidably provided with a slider anti-slip rod, and the top surface of the slider anti-slip rod penetrates through the top surface of the anti-slip rod sliding cavity and is fixedly connected with the top surface of the negative pressure slider.

In a preferred embodiment, the depth of the exhaust slide cavity is equal to the sum of the compressed lengths of the exhaust slide block and the elastic member, the size of the negative pressure slide block is the same as that of the central core slide cavity, and the top surface of the negative pressure slide block is positioned on the same horizontal plane with that of the central core during injection.

The invention has the technical effects and advantages that:

1. according to the invention, the side exhaust structure is arranged, the side exhaust sliding block and the side exhaust pipe are utilized to communicate the injection cavity with the outside, when the injection is started, the material liquid flow enters the injection cavity, a large amount of gas flow in the injection cavity is discharged through the side exhaust mechanism to avoid the gas trap phenomenon, and the effective discharge of the gas can effectively avoid the high pressure generated in the cavity to reduce the injection pressure, so that the injection effect is improved;

2. according to the invention, the movable negative pressure slide block is arranged on the surface of the injection core, when core pulling and demoulding are carried out, when the turbofan workpiece and the mould generate negative pressure, the negative pressure slide block is pushed by atmospheric pressure through the core air inlet channel to slide towards the direction opposite to the direction of extraction of the injection core, and when the negative pressure slide block is separated from the core sliding cavity, the injection cavity is communicated with the external environment through the core air inlet channel, so that the negative pressure disappears, and the demoulding and core pulling are convenient.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention.

FIG. 2 is a schematic side view of the present invention.

Fig. 3 is a schematic view of the negative pressure prevention structure of the present invention.

Fig. 4 is a schematic structural diagram of fig. 3 at a according to the present invention.

The reference signs are: 1. injecting a bottom die; 2. injecting an upper mold; 3. injecting a substrate; 4. a core substrate; 5. injecting the core; 6. an injection nozzle; 7. an injection tube; 8. injecting a mold cavity; 9. a side exhaust mechanism; 10. a side exhaust pipe; 11. a negative pressure slide block; 12. a core air intake passage; 13. a slide block anti-drop rod; 14. a core slide cavity; 15. an anti-drop rod sliding cavity; 91. an exhaust sliding cavity; 92. an exhaust slider; 93. an exhaust flow passage; 94. an elastic member; 111. a negative pressure prevention airflow channel; 112. and a magnet is retracted.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in fig. 1-4, a turbofan injection mold includes an injection bottom mold 1, an injection upper mold 2, an injection substrate 3, a central substrate 4 and an injection central core 5, wherein the injection bottom mold 1 and the injection upper mold 2 are internally provided with an injection cavity 8, the injection upper mold 2 and the injection substrate 3 are internally provided with an injection pipe 7, the surface of the injection substrate 3 is provided with an injection nozzle 6 communicated with the top end of the injection pipe 7, the peripheral side of the injection bottom mold 1 is fixedly provided with a side exhaust mechanism 9, the peripheral side of the injection bottom mold 1 is provided with a side exhaust pipe 10, the side exhaust mechanism 9 includes an exhaust sliding cavity 91 and an exhaust sliding block 92, the end of the side exhaust pipe 10 is communicated with the inside of the exhaust sliding cavity 91, the outer side of the exhaust sliding block 92 is slidably connected with the inner side of the exhaust sliding cavity 91, the inner sides of the central substrate 4 and the injection central core 5 are provided with a central core intake passage 12, the, the bottom end of the central core sliding cavity 14 is communicated with the top end of the central core air inlet channel 12, the negative pressure slide block 11 is slidably mounted inside the central core sliding cavity 14, the negative pressure air flow preventing channel 111 is formed in the inner side of the negative pressure slide block 11, and the backing magnet 112 is fixedly mounted on the bottom surface of the central core sliding cavity 14.

The implementation mode is specifically as follows: by arranging the side exhaust structure 9, the side exhaust slide block 92 and the side exhaust pipe 10 are utilized to communicate the injection cavity 8 with the outside, when the injection starts, the material liquid flow enters the injection cavity 8, a large amount of air flow in the injection cavity 8 is exhausted through the side exhaust structure 9 to avoid the air trapping phenomenon, and the effective exhaust of the air can effectively avoid the high air pressure generated in the cavity to reduce the injection pressure, so that the injection effect is improved; in addition, the movable negative pressure slide block 11 is arranged on the surface of the injection core 5, when core pulling and core pulling are carried out, when a turbofan workpiece and a mold generate negative pressure, the negative pressure slide block 11 is pushed by atmospheric pressure through the core air inlet channel to slide in the direction opposite to the direction of drawing out the injection core 5, when the negative pressure slide block 11 is separated from the core sliding cavity 14, the injection cavity 8 is communicated with the external environment through the core air inlet channel 12, so that the negative pressure disappears, and the core pulling and core pulling are conveniently carried out.

An exhaust runner 93 is arranged inside the exhaust slider 92, air holes communicated with the exhaust runner 93 are formed in the upper side and the lower side of the exhaust slider 92, the other end of the exhaust runner 93 is communicated with an inner cavity of the exhaust sliding cavity 91, the injection cavity 8 is communicated with the outside by using the side exhaust slider 92 and the side exhaust pipe 10, and a large amount of air flow inside the injection cavity 8 is exhausted through the side exhaust mechanism 9 to avoid the air pocket phenomenon.

Wherein, the inside of the exhaust sliding cavity 91 is fixedly provided with an elastic piece 94, the elastic piece 94 is an elastic metal sheet material component, two ends of the elastic piece 94 are respectively and fixedly connected with the inner wall of the exhaust sliding cavity 91 and one side of the exhaust slider 92, and the ejection of the exhaust slider 92 is controlled, so that the injection cavity 8 and the side exhaust pipe 10 are communicated.

Wherein, the circumference of the negative pressure slide block 11 is provided with an air hole communicated with the negative pressure air flow channel 111, the other end of the negative pressure air flow channel 111 is communicated with the inner cavity of the central core slide cavity 14, the negative pressure air flow channel 111 is communicated with the outer side of the central core substrate 4 through the central core slide cavity 14 and the central core air inlet channel 12, and the negative pressure during demoulding and core pulling is eliminated.

The injection core 5 is sleeved in the injection bottom die 1 in a sliding mode, the top end of the injection core 5 is located on the inner side of the injection cavity 8, the core substrate 4 is communicated with a core air inlet channel 12 inside the injection core 5, and a negative pressure cavity generated by the injection core 5 and a workpiece is communicated with the external atmospheric pressure.

The negative pressure slider 11 is a metal iron block material member, the backing magnet 112 is a permanent magnet member, the inner side of the injection core 5 is provided with an anti-falling rod sliding cavity 15 located at the bottom of the core sliding cavity 14, the inner side of the anti-falling rod sliding cavity 15 is slidably provided with a slider anti-falling rod 13, the top surface of the slider anti-falling rod 13 penetrates through the top surface of the anti-falling rod sliding cavity 15 and is fixedly connected with the top surface of the negative pressure slider 11, and the backing and the anti-falling of the negative pressure slider 11 are achieved.

The depth of the exhaust sliding cavity 91 is equal to the sum of the lengths of the exhaust sliding block 92 and the elastic part 94 after compression, the size of the negative pressure sliding block 11 is the same as that of the central core sliding cavity 14, and the top surface of the negative pressure sliding block 11 and the top surface of the injection central core 5 are positioned on the same horizontal plane, so that the flatness of the inner wall of the injection cavity 8 is ensured, and the influence on the quality of workpieces is prevented.

The working principle of the invention is as follows:

the first step is as follows: pushing the negative pressure slide block 11 to enter the central core slide cavity 14, adsorbing the negative pressure slide block 11 through the back-off magnet 112 to keep the negative pressure slide block 11 in the central core slide cavity 14, and pushing the injection substrate 3 and the central core substrate 4 to carry out die assembly and locking on the injection bottom die 1 and the injection upper die 2;

the second step is that: injecting plastic resin and partial high polymer materials in a heating melting state into an injection cavity 8 through an injection nozzle 6 and an injection pipe 7, enabling material liquid flow to enter the injection cavity 8, communicating the injection cavity 8 with the outside through a side exhaust slider 92 and a side exhaust pipe 10, discharging a large amount of air flow in the injection cavity 8 through a side exhaust mechanism 9 to avoid air pocket phenomenon, pushing the side surface of the side exhaust mechanism 9 back to the inside of an exhaust sliding cavity 91 by pressing the side surface of the side exhaust mechanism 9 along with the increase of the entering amount of the material liquid flow, namely completing injection, attaching the side surface of an exhaust flow channel 93 to the exhaust sliding cavity 91 to realize the sealing of the exhaust mechanism, and preventing the injection materials from entering the exhaust flow channel 93;

the third step: when liquid materials are cooled and solidified, demolding and coring can be carried out, the central core substrate 4 is directly beaten to drive the injection central core 5 to be drawn out during core pulling, a negative pressure cavity is easily generated during demolding and core pulling due to the fact that the viscosity of the injection central core substrate is high and the attaching degree between the injection central core substrate and an injection mold is high after injection molding of thermoplastic resin and high polymer materials, the negative pressure slider 11 is pushed to slide towards the direction where the injection central core 5 is drawn out through the central core air inlet channel 12 under the atmospheric pressure, when the negative pressure slider 11 slides out of the central core sliding cavity 14, the negative pressure is eliminated by communicating the injection cavity 8 with the external environment through the negative pressure preventing air channel 111 and the central core air inlet channel 12, and.

The points to be finally explained are: first, in the description of the present application, it should be noted that, unless otherwise specified and limited, the terms "mounted," "connected," and "connected" should be understood broadly, and may be a mechanical connection or an electrical connection, or a communication between two elements, and may be a direct connection, and "upper," "lower," "left," and "right" are only used to indicate a relative positional relationship, and when the absolute position of the object to be described is changed, the relative positional relationship may be changed;

secondly, the method comprises the following steps: in the drawings of the disclosed embodiments of the invention, only the structures related to the disclosed embodiments are referred to, other structures can refer to common designs, and the same embodiment and different embodiments of the invention can be combined with each other without conflict;

and finally: 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 are within the spirit and principle of the present invention are intended to be included in the scope of the present invention.

Claims

1. The utility model provides a turbofan injection mold, includes injection die block (1), injects and goes up mould (2), injection base plate (3), well core base plate (4) and injection well core (5), injection die cavity (8) have been seted up to the inside of mould (2) on injection die block (1) and the injection, injection pipe (7) have been seted up to the inside of mould (2) and injection base plate (3) on the injection, injection nozzle (6) with injection pipe (7) top looks UNICOM are seted up on the surface of injection base plate (3), its characterized in that: the injection mold comprises an injection bottom mold (1), wherein a side exhaust mechanism (9) is fixedly installed on the peripheral side of the injection bottom mold (1), a side exhaust pipe (10) is arranged on the peripheral side of the injection bottom mold (1), the side exhaust mechanism (9) comprises an exhaust sliding cavity (91) and an exhaust sliding block (92), the end part of the side exhaust pipe (10) is communicated with the inside of the exhaust sliding cavity (91), the outer side of the exhaust sliding block (92) is in sliding connection with the inner side of the exhaust sliding cavity (91), a central core air inlet channel (12) is arranged on the inner sides of a central core substrate (4) and an injection central core (5), a central core sliding cavity (14) is arranged on the top surface of the injection central core (5), the bottom end of the central core sliding cavity (14) is communicated with the top end of the central core air inlet channel (12), a negative pressure sliding block (11) is slidably installed inside the central core sliding cavity (14), and a negative pressure air preventing, and a backspacing magnet (112) is fixedly arranged on the bottom surface of the central core sliding cavity (14).

2. The turbofan injection mold of claim 1 wherein: an exhaust runner (93) is arranged in the exhaust slider (92), air holes communicated with the exhaust runner (93) are formed in the upper side and the lower side of the exhaust slider (92), and the other end of the exhaust runner (93) is communicated with an inner cavity of the exhaust sliding cavity (91).

3. The turbofan injection mold of claim 1 wherein: the inside fixed mounting of exhaust sliding chamber (91) has elastic component (94), elastic component (94) are elastic sheet metal matter component, the both ends of elastic component (94) respectively with the inner wall of exhaust sliding chamber (91) and one side fixed connection of exhaust slider (92).

4. The turbofan injection mold of claim 1 wherein: the periphery of the negative pressure slide block (11) is provided with an air hole communicated with the negative pressure preventing air flow channel (111), the other end of the negative pressure preventing air flow channel (111) is communicated with the inner cavity of the central core sliding cavity (14), and the negative pressure preventing air flow channel (111) is communicated with the outer side of the central core substrate (4) through the central core sliding cavity (14) and the central core air inlet channel (12).

5. The turbofan injection mold of claim 1 wherein: the injection core (5) is sleeved in the injection bottom die (1) in a sliding mode, the top end of the injection core (5) is located on the inner side of the injection cavity (8), and the core substrate (4) is communicated with a core air inlet channel (12) inside the injection core (5).

6. The turbofan injection mold of claim 1 wherein: negative pressure slider (11) are metal iron plate material component, back magnet (112) and be the permanent magnet component, the inboard of core (5) is offered and is located the smooth chamber of anticreep pole (15) of the smooth chamber of well core (14) bottom in the injection, the inboard slidable mounting in the smooth chamber of anticreep pole (15) has slider anticreep pole (13), the top surface of slider anticreep pole (13) run through the top surface in the smooth chamber of anticreep pole (15) and with the top surface fixed connection of negative pressure slider (11).

7. The turbofan injection mold of claim 1 wherein: the depth of the exhaust sliding cavity (91) is equal to the sum of the lengths of the exhaust sliding block (92) and the elastic piece (94) after compression, the size of the negative pressure sliding block (11) is the same as that of the central core sliding cavity (14), and the top surface of the negative pressure sliding block (11) and the top surface of the injection central core (5) are positioned on the same horizontal plane.