CN110587923A

CN110587923A - Electric hair drier shell injection mold and injection molding method thereof

Info

Publication number: CN110587923A
Application number: CN201910870623.7A
Authority: CN
Inventors: 陈文化
Original assignee: Zhuhai Jizhi Technology Co Ltd
Current assignee: Zhuhai Jizhi Technology Co Ltd
Priority date: 2019-09-16
Filing date: 2019-09-16
Publication date: 2019-12-20
Anticipated expiration: 2039-09-16
Also published as: CN110587923B

Abstract

The invention discloses an injection mold for an electric hair drier shell and an injection molding method thereof, and the injection mold comprises a front mold, a rear mold, a left inclined mold, a right inclined mold and an inner telescopic cocker mechanism arranged in the rear mold, wherein the inner telescopic cocker mechanism penetrates through the rear mold and abuts against the deepest part of a first cavity, a main shell cavity of a main shell part of a product is formed among the inner telescopic cocker mechanism, the front mold, the left inclined mold and the right inclined mold, and a handle cavity of a handle part of the product and communicated with the main shell cavity is formed in the lower middle parts of the front mold and the rear mold. According to the invention, by adopting the structures of the inclined insertion type and the inner shrinkage cork, the line marks and the section differences generated in the injection molding process are eliminated, the aesthetic effect of the injection molded product is greatly improved, and the injection molding process of the product without the line marks and the section differences is realized.

Description

Electric hair drier shell injection mold and injection molding method thereof

Technical Field

The invention relates to the technical field of electric hair dryers, in particular to an injection mold for an electric hair dryer shell and an injection molding method thereof.

Background

The existing hair drier shell has line marks or section differences left after injection molding after molding, which seriously affects the beautiful effect. Its shaping defect mainly divide into two kinds, one is set up on the line mark of the shell symmetry line of hairdryer shell, this line mark divides into the hairdryer shell left and right halves, form by left mould and right mould clamp, its second is hairdryer shell can have serious afterbody step with the rear side position department of handle connecting portion, this step is the poor defect of section on the shell, its step is formed at the shaping in-process by inserting the mould after, this line mark and the poor influence outward appearance effect of section seriously, hairdryer line mark and the poor meeting of section can produce the hand of scraping sensation in the use simultaneously, the travelling comfort is poor.

Disclosure of Invention

In order to solve one of the technical problems, the invention provides an injection mold for an electric hair drier shell and an injection molding method thereof, which realize the injection molding process of the electric hair drier shell with an integrally molded main shell handle and solve the problems of line marks and section differences.

The technical scheme adopted by the invention for solving the technical problems is as follows: an injection mold for an electric hair drier shell comprises a rear mold, wherein an inner necking mechanism for forming the inner surface of a main shell part of a product is arranged in the upper middle part of the rear mold, and a first male mold for forming the inner surface of a handle part of the product is arranged in the lower middle part of the rear mold; the upper middle part of the front die is provided with a first concave cavity forming the outer surface of the main shell part of the product, and the lower middle part of the front die is provided with a second concave cavity forming the outer surface of the handle part of the product; the left inclined die is arranged at the left lower part of the rear die and can move towards the top direction of the first male die; the right inclined die is arranged at the lower right of the rear die and can move towards the top direction of the first male die; when the die is closed, the internal shrinkage mechanism penetrates through the rear die and abuts against the deepest part of the first cavity, a main shell cavity of a main shell part of a product is formed among the internal shrinkage mechanism, the first cavity, the left inclined die and the right inclined die, and a handle cavity of a handle part of the product and communicated with the main shell cavity is formed between the first male die and the second cavity.

For further improvement of the scheme, the internal contracting mechanism comprises an internal contracting demoulding film and a plurality of telescopic flaps, a plurality of flap grooves which face the front mould and incline along the central axis of the internal contracting demoulding film are annularly arranged on the internal contracting demoulding film, and the telescopic flaps are arranged in the flap grooves and can extend out of the internal contracting demoulding film along the flap grooves.

For the further improvement of the scheme, the telescopic valve comprises an upper telescopic valve, a left telescopic valve, a right telescopic valve and a lower telescopic valve, and a second male die for forming a connecting port between the main shell and the handle in the product is arranged at the bottom of the lower telescopic valve.

The further improvement of the scheme is that the rear inclined pushing faces are arranged at the tail ends of the left inclined die and the right inclined die, a left inclined pushing block and a right inclined pushing block are fixedly connected to the front die, front inclined pushing faces matched with the rear inclined pushing faces are arranged on the left inclined pushing block and the right inclined pushing block, and the front die pushes the left inclined die and the right inclined die to move respectively through the left inclined pushing block and the right inclined pushing block.

For further improvement of the scheme, a push plate is arranged in the middle of the rear die, spans the inner telescoping mechanism and can push the product out of the rear die along the outer contour of the inner telescoping mechanism.

The improved structure of the product pushing device comprises a movable plate, the tail end of the telescopic flap is abutted to the movable plate, the pushing plate is fixedly connected to the movable plate through a fixed rod, and the movable plate is used for pushing the telescopic flap and the pushing plate and pushing out the product.

The further improvement of the scheme is that the improved structure further comprises a lower die arranged at the bottom of the rear die, a bottom female die is arranged at the top of the lower die, and a concave surface matched with the bottom female die is arranged at the bottom of the first male die.

For the further improvement of the scheme, the two sides of the traveling path of the left inclined die and the right inclined die are provided with limiting strips.

An injection molding method of an injection mold of an electric hair drier shell comprises the following steps:

a, the front die is translated towards the rear die, and the left inclined die and the right inclined die are pushed to move towards the top of the first male die until the front die and the rear die are closed, and at the moment, a closed cavity is formed by the first cavity, the internal shrinkage cavity mechanism, the second male die, the second cavity, the first male die and the bottom cavity;

b, injecting injection molding liquid into the closed cavity from an injection molding pipeline of the front mold, and cooling to form a product;

and c, separating the front mold from the rear mold, obliquely retreating the left inclined mold and the right inclined mold to the left lower part and the right lower part of the rear mold respectively, and pushing the push plate and the telescopic flap to eject the product from the rear mold and the inner telescopic flap by the movable plate so that the product is separated from the rear mold.

For further improvement of the scheme, in the step a, a left inclined pushing block and a right inclined pushing block are arranged on the front die, and the left inclined pushing block and the right inclined pushing block respectively push the left inclined die and the right inclined die to move through the front inclined pushing surface.

The invention has the beneficial effects that:

1. according to the invention, by virtue of the inclined insertion type and internal shrinkage cork structure, the line marks and the section differences generated in the injection molding process are eliminated, the aesthetic effect of the injection molded product is greatly increased, and the injection molding process of the product without the line marks and the section differences is realized;

2. the invention realizes the injection molding process of the integrated shell of the main shell and the handle, and solves the problem that the main shell and the handle of the electric hair drier are difficult to be integrally molded;

3. the inner telescoping mechanism is utilized to form structures such as corresponding fasteners and limiting strips on the inner side surface of the main shell of the product, the push plate structure is reasonably designed after injection molding, and the molded product is pushed out of a rear mold through the push plate and the telescoping flaps on the inner telescoping mechanism, so that the rapid mold stripping process is realized, and the production efficiency of the product is improved;

4. the integral front mold structure is designed, so that the line marks on the symmetrical surface of the product, which are caused by the left mold and the right mold, are eliminated, and the injection molding process without the line marks of the product is realized;

5. the invention designs the left inclined die and the right inclined die mechanism, solves the problem of section difference caused by rear insertion of the die and realizes the non-section difference injection molding process of the integrated structure of the electric hair drier main shell handle.

Drawings

The invention is further illustrated with reference to the following figures and examples:

FIG. 1 is an isometric view of a preferred embodiment of the invention;

FIG. 2 is a drawing of a front mold, a rear mold, a left diagonal mold, and a right diagonal mold according to a preferred embodiment of the present invention;

FIG. 3 is a diagram of the connection between the female taper mechanism, the rear mold, the left bevel mold, the right bevel mold and the lower mold according to a preferred embodiment of the present invention;

FIG. 4 is a block diagram of a preferred embodiment of the present invention after concealing the front shell, rear mold;

FIG. 5 is a block diagram of a front mold of a preferred embodiment of the present invention;

FIG. 6 is a block diagram of the rear mold of a preferred embodiment of the present invention;

FIG. 7 is a block diagram of the internal telescoping mechanism of a preferred embodiment of the present invention;

FIG. 8 is a block diagram of the retraction release film of a preferred embodiment of the present invention;

FIG. 9 is a view of the connection of the retractable mechanism to the movable plate according to a preferred embodiment of the present invention;

FIG. 10 is a block diagram of the rear housing of a preferred embodiment of the present invention;

FIG. 11 is a block diagram of the front housing of a preferred embodiment of the present invention;

FIG. 12 is a structural view of a left/right/lower diagonal push block of a preferred embodiment of the present invention;

FIG. 13 is a block diagram of a right angle inclined form of a preferred embodiment of the present invention;

FIG. 14 is a block diagram of the lower die of a preferred embodiment of the present invention;

FIG. 15 is an isometric view of an injection molded product of a preferred embodiment of the present invention;

FIG. 16 is an isometric view of an injection molded product of a preferred embodiment of the invention.

Detailed Description

Reference will now be made in detail to the present preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to like elements throughout.

In the description of the present invention, it should be understood that the orientation or positional relationship referred to in the description of the orientation, such as the upper, lower, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, the meaning of a plurality of means is one or more, the meaning of a plurality of means is two or more, and larger, smaller, larger, etc. are understood as excluding the number, and larger, smaller, inner, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present invention, unless otherwise explicitly limited, terms such as arrangement, installation, connection and the like should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific contents of the technical solutions.

Example 1

Referring to fig. 15 and 16, fig. 15 and 16 are structural diagrams of injection molded products of the present invention, the products are hair dryer main housing and handle integrated housings, including a main housing portion 510 and a handle portion 520, the handle portion 520 is a handle housing when the handle is installed, the hair dryer housing with integrated structure design is convenient to disassemble and assemble, compact in structure and comfortable in use, the main housing portion 510 is cylindrical, a chute 540 and a positioning piece 530 are arranged in the main housing portion 510, air holes are arranged around the connection portion of the main housing portion 510 and the handle portion 520, and a semicircular handle seat is arranged at the bottom of the handle portion 520.

Referring to fig. 1 to 14 together, a preferred embodiment is an injection mold for a hair dryer housing, which includes a front mold 110, a rear mold 120, a left inclined mold 130 and a right inclined mold 140, and the front mold 110 is fixed on an injection molding device and can move back and forth, and the back movement realizes a mold clamping process with the rear mold 120.

The rear mold 120, which is a stationary mold, is fixed to the injection molding apparatus, and has an inner undercut mechanism 160 penetrating through an upper middle portion thereof, the inner undercut mechanism 160 being configured to form an inner surface of the main housing portion 510, and a first male mold 121 disposed at a lower middle portion thereof, the first male mold 121 being configured to form an inner surface of the handle portion 520.

The upper portion of the front die 110 is provided with a backward protruding portion, the upper middle portion of the front die is provided with a first cavity 112, the first cavity 112 is used for forming the outer surface portion of the main shell, a line mark structure which influences product attractiveness and is caused by a die separating structure is eliminated, the lower middle portion of the front die is provided with a second cavity 113 which faces downwards vertically, and the second cavity 113 is used for forming the outer surface of a product. The middle part of the first cavity 112 is provided with an injection hole 111, and the feed liquid enters the molding cavities of the front mold 110 and the rear mold 120 through the injection hole 111. A first inclined groove and a second inclined groove which are symmetrically arranged left and right obliquely downwards are formed between the first cavity 112 and the second cavity 113, and the first inclined groove and the second inclined groove are respectively used for accommodating the left inclined die 130 and the right inclined die 140.

And a left inclined die 130 provided at the lower left of the rear die 120 and movable toward the top direction of the first male die 121, for molding a left half portion of a junction of the handle part 520 and the main housing part 510.

And a right inclined die 140 provided at the lower left of the rear die 120 and movable toward the top direction of the first male die 121, for molding a right half of a junction of the handle part 520 and the main housing part 510.

In the mold, during mold closing, the inner telescoping mechanism 160 penetrates through the rear mold 120 and abuts against the deepest part of the first cavity 112, the front end surface of the inner telescoping mechanism 160 is a plane and can be completely attached to the deepest part of the first cavity 112, the inner telescoping mechanism 160, the left inclined mold 130 and the right inclined mold 140 form a main shell cavity of the main shell part 510, and a handle cavity of the handle part 520 communicated with the main shell cavity is formed between the first male mold 121 and the second cavity 113. The left inclined die 130 is attached to the first chute after die assembly, and the right inclined die 140 is attached to the second chute after die assembly, so that the whole device is more compact.

The telescoping mechanism 160 comprises a telescoping release film 161 and a plurality of telescoping flaps, the telescoping flaps are used for forming a positioning block on the inner side surface of the main shell part 510 and an inner connection port 550 between the main shell part and the handle part 520, the telescoping release film 161 is annularly provided with a plurality of flap grooves 167 which incline towards the front mold 110 and along the central axis of the telescoping release film 161, the flap grooves 167 are inclined slots arranged on the telescoping release film 161, the telescoping flaps can move in the flap grooves 167 and extend forwards along the flap grooves 167, and gradually separate from the inner side surface of the main shell part 510, so that the rest parts of the telescoping flaps except the front end surface are not contacted with the main shell part 510 any more.

The upper middle part of the rear die 120 is provided with a push plate 170, the push plate 170 is arranged on the internal telescoping mechanism 160 in a spanning mode, and the push plate 170 can move along the external contour of the internal telescoping mechanism 160 and push a product out of the rear die 120 to realize a demoulding process. The demolding process further includes an extending process of the retractable flap, the retractable flap and the push plate 170 push the product out of the rear mold 120 at the same time, and the retractable flap is gradually separated from the inner side surface of the main shell portion 510 due to the downward movement in the pushing process.

The telescopic valve comprises an upper telescopic valve 162, a left telescopic valve 163, a right telescopic valve 164 and a lower telescopic valve 165, the bottom of the lower telescopic valve 165 is provided with a second male die 166, and the second male die 166 is matched with the first male die 121 to form a connecting port 550 between the main shell part 510 and the handle part 520 in the product during die assembly. The upper telescopic flap 162, the left telescopic flap 163, the right telescopic flap 164 and the lower telescopic flap 165 are provided with limiting edges for buckling in the flap groove 167, the lower telescopic flap 165 can be arranged in the flap groove 167 in a matching manner through the abutting part of the rear mold 120 or the push plate 170, and of course, the lower telescopic flap 165 can be limited in the flap groove 167 through the limiting edges.

The tail ends of the left inclined die 130 and the right inclined die 140 are respectively provided with a rear inclined pushing surface 420, the front die 110 is fixedly provided with a left inclined pushing block 211 and a right inclined pushing block 212, the left inclined pushing block 211 and the right inclined pushing block 212 are used for pushing the left inclined die 130 and the right inclined die 140 to move, the left inclined pushing block 211 and the right inclined pushing block 212 are provided with front inclined pushing surfaces 410 matched with the rear inclined pushing surfaces 420, in the die assembly process, the front die 110 horizontally moves towards the rear die 120, the left inclined pushing block 211 and the right inclined pushing block 212 are gradually attached to the tail ends of the left inclined die 130 and the right inclined die 140, the left inclined die 130 and the right inclined die 140 are gradually pushed by the front inclined pushing surfaces 410 to move towards the bottom of the first male die 121, and when the front die 110 and the rear die 120 are closed, the left inclined die 130 and the right inclined die 140 are just tightly attached to form the outer surfaces of the handle portion 520 and the main shell portion 510 and form air holes. The left side and the right side of the tail ends of the left inclined die 130 and the right inclined die 140 are respectively provided with a limiting strip 221, a movement channel of the left inclined die 130 and the right inclined die 140 is formed between the limiting strips 221, and when the front die 110 pushes the left inclined die 130 and the right inclined die 140 to move, the left inclined push block 211 and the right inclined push block 212 move towards the top of the first male die 121 through the movement channels. In this embodiment, the front mold 110 pushes the left inclined mold 130 and the right inclined mold 140 to perform the mold closing process in the mold closing process, only one moving part is needed to realize the mold closing process of the whole cavity, the structure is simple and convenient, a driving part is not needed to be additionally arranged to drive the left inclined mold 130 and the right inclined mold 140 to move, the multi-linkage process is realized, the mold closing efficiency is greatly improved, and the mold closing precision can be improved.

The telescopic ladder is characterized by further comprising a movable plate 240, an installation block 180 matched with the telescopic petals is fixedly arranged on the movable plate 240, a buckling groove 181 is formed in the front side of the installation block 180, the tail end of the telescopic petals is clamped on the buckling groove 181 and can move along the buckling groove 181, the moving distance of the telescopic petals is the contraction distance of the central line of the inward-contracting demoulding 161 when the telescopic petals move along the petal grooves 167, the buckling groove 181 is used for compensating the contraction distance of the telescopic petals on the central line of the inward-contracting demoulding 161, the push plate 170 is fixedly connected to the movable plate 240 through a fixed rod, and two ends of the fixed rod are fixedly connected to the push plate 170 and the. The movable plate 240 moves forwards, the telescopic petals and the push plate 170 are pushed to move forwards simultaneously, the product is pushed out from the rear die 120, the telescopic petals move obliquely along the central line of the inward-contracting demoulding membrane 161 along the petal groove 167, the front end of the product pushes the front end of the product, the push plate 170 pushes the rear end of the product to move, and the telescopic petals and the push plate 170 are driven to move through the movable plate 240, so that the horizontal moving distance of the telescopic petals is the same as the horizontal moving distance of the push plate 170, the process of pushing simultaneously can be realized, and the demoulding efficiency is increased. Of course, only through flexible lamella in order to realize its demoulding process, push pedal 170 is used for assisting flexible lamella to release the product, realizes quick demoulding process, improves demoulding efficiency, increases thrust. In addition to the end of the telescopic flap being fastened to the mounting block 180, the movable plate 240 can push the telescopic flap to move in the flap slot 167 by directly abutting on the movable plate 240 as the telescopic flap passes through the rear mold 120 and is disposed in the flap slot 167.

The die further comprises a lower die 150 arranged at the bottom of the rear die 120, the lower die 150 is used for forming a semicircular handle seat, a concave surface 123 is arranged at the bottom of the first male die 121, a bottom male die 151 matched with the concave surface 123 is arranged at the top of the lower die 150, a rear inclined push surface 420 is also arranged at the bottom of the lower die 150, a lower inclined push block 213 is arranged at the bottom of the front die 110, the lower inclined push block 213 is similar to the left inclined push block 211 and the right inclined push block 212, the lower die 150 is pushed to move upwards through the front inclined push surface 410, and a product cavity is formed in the die closing process and in the moving process. Similarly, the lower die 150 is provided with a limiting strip 221 at both sides, the limiting strip 221 limits the up-and-down movement, and the bottom of the lower die 150 is clamped on the rear die 120 through a stepped groove.

Still including preceding shell 210, backshell 220 and fixed plate 230, front mould 110 accessible screw connection's mode is fixed in preceding shell 210, preceding shell 210 promotes back mould 120 and removes to front mould 110, be equipped with the mouth of moulding plastics that lets in the liquid of moulding plastics on the preceding shell 210, back mould 120 accessible screw connection's mode is fixed to be set up in backshell 220, backshell 220 is through fixed column rigid coupling on fixed plate 230, the four corners department of fly leaf 240 is equipped with spacing post 320, the tip of spacing post 320 wears to establish in backshell 220 and can carry out the back-and-forth movement in backshell 220, the cover is equipped with spring 310 on the spacing post 320, spring 310 is used for promoting the fly leaf 240 to reset and makes fly leaf 240 support on fixed plate. The retraction release film 161 is fixed to the fixed plate 230 by a connecting rod, which passes through the movable plate 240. The front mold 110 is also fixedly provided with pins for forming a plurality of through holes of the handle part 520, and the pins move back and forth along with the front mold 110 during mold closing and mold opening. The front case 210 may push the front mold 110 to be coupled with the rear mold 120 by a hydraulic cylinder or a ball screw structure. And cooling water pipes penetrate through the front shell 210, the front mold 110, the rear mold 120 and the rear shell 220, form a cooling system, and are used for realizing the rapid cooling process of the front mold 110 and the rear mold 120. Side housings 250 are provided at both sides of the fixed plate 230, and a stroke groove of the movable plate 240 is formed between the side housings 250 to limit the forward and backward movement of the movable plate 240.

In this embodiment, the rear housing 220 is provided with a receiving groove for receiving the left inclined mold 130, the right inclined mold 140 and the lower mold 150, the left inclined mold 130, the right inclined mold 140 and the lower mold 150 are disposed in the receiving groove when they are at initial positions, the left inclined push block 211, the right inclined push block 212 and the lower inclined push block 213 are fixedly connected to the front housing 210 by screws, and since the front mold 110 is fixedly connected to the front housing 210, the relative positions of the front mold 110, the left inclined push block 211, the right inclined push block 212 and the lower inclined push block 213 are fixed, which is the same as the effect of fixedly connecting the left inclined push block 211, the right inclined push block 212 and the lower inclined push block 213 to the front mold 110.

In addition, a thimble forming a blind hole 560 in the inner surface of the handle portion 520 is formed through the first male die 121, and the thimble and the second cavity 113 form a mounting hole for an internal component of the handle portion 520, i.e., the blind hole 560. Meanwhile, the ejector pin can be fixedly connected to the movable plate 240, and the demoulding process is completed through the telescopic flap and the push plate 170.

In specific implementation, the injection molding method of the injection mold comprises the following steps:

step a, a front shell 210 pushes a front die 110 to move backwards, a left inclined push block 211 and a right inclined push block 212 respectively push a left inclined die 130 and a right inclined die 140 to move towards the top of a first male die 121 in the process of translation, a lower inclined push block 213 pushes a lower die 150 to move upwards until the front die 110 and the rear die 120 are closed, and a die closing process is completed, wherein a closed cavity is formed by a first cavity 112, an inner shrinkage mechanism 160, a second male die 166, a second cavity 113, the first male die 121 and a bottom male die 151 and is a product cavity;

step b, injecting injection molding liquid into the closed cavity from the injection molding hole 111 of the front mold 110, and cooling through a cooling system to form a product;

step c, the front shell 210 pushes the front mold 110 to separate from the rear mold 120, the left inclined mold 130, the right inclined mold 140 and the lower mold 150 respectively retract to the left lower side, the right lower side and the right bottom of the rear mold 120 through gravity, the movable plate 240 pushes the push plate 170 and the telescopic flaps to eject the product from the rear mold 120 and the retracted shell, so that the product separates from the rear mold 120, and the demolding process is completed.

In addition, after the front mold 110 is separated from the rear mold 120, the left and right inclined molds 130 and 140 and the lower mold 150 may be returned to the original positions by the return tension springs.

Example 2

The front shell 210 and the rear die 120 are separated, the front die 110 is driven by an independent driving member, the driving member can be a hydraulic cylinder or a ball screw structure, the left inclined pushing block 211, the right inclined pushing block 212 and the lower inclined pushing block 213 are fixedly connected to the front shell 210, after the driving member pushes the front die 110 and the rear die 120 to be matched, the front shell 210 respectively pushes the left inclined die 130, the right inclined die 140 and the lower inclined die to be matched through the left inclined pushing block 211, the right inclined pushing block 212 and the lower inclined pushing block 213, and the technical effect of the invention can be achieved.

In addition, the injection hole 111 can be arranged on the rear mold 120 in addition to the front mold 110, when the injection hole 111 is arranged on the rear mold 120, a water inlet needle is arranged on the front mold 110, and a clearance groove is arranged on the lower telescopic flap 165 and used for preventing the lower telescopic flap 165 from influencing the water inlet needle, so that the injection molding effect can be achieved.

The above description is only a preferred embodiment of the present invention, but the present invention is not limited to the above embodiments, and the present invention shall fall within the protection scope of the present invention as long as the technical effects of the present invention are achieved by any similar or identical means.

Claims

1. An injection mold for a hair dryer shell is characterized by comprising

The upper middle part of the rear die is provided with an internal shrinkage mechanism for forming the inner surface of the main shell part of the product, and the lower middle part of the rear die is provided with a first male die for forming the inner surface of the handle part of the product;

the upper middle part of the front die is provided with a first concave cavity forming the outer surface of the main shell part of the product, and the lower middle part of the front die is provided with a second concave cavity forming the outer surface of the handle part of the product;

the left inclined die is arranged at the left lower part of the rear die and can move towards the top direction of the first male die;

the right inclined die is arranged at the lower right of the rear die and can move towards the top direction of the first male die;

when the die is closed, the internal shrinkage mechanism penetrates through the rear die and abuts against the deepest part of the first cavity, a main shell cavity of a main shell part of a product is formed among the internal shrinkage mechanism, the first cavity, the left inclined die and the right inclined die, and a handle cavity of a handle part of the product and communicated with the main shell cavity is formed between the first male die and the second cavity.

2. The injection mold for the hair dryer shell as claimed in claim 1, wherein the retractable mechanism comprises a retractable release film and a plurality of retractable flaps, the retractable release film is annularly provided with a plurality of flap grooves which are inclined towards the front mold and along the central axis of the retractable release film, and the retractable flaps are arranged in the flap grooves and can extend out of the retractable release film along the flap grooves.

3. The injection mold for the hair dryer shell according to claim 2, wherein the telescopic flap comprises an upper telescopic flap, a left telescopic flap, a right telescopic flap and a lower telescopic flap, and a second male die for forming a connecting port between the main shell and the handle of the product is arranged at the bottom of the lower telescopic flap.

4. The injection mold for the hair dryer shell according to claim 3, wherein the ends of the left inclined mold and the right inclined mold are respectively provided with a rear inclined pushing surface, the front mold is fixedly connected with a left inclined pushing block and a right inclined pushing block, the left inclined pushing block and the right inclined pushing block are respectively provided with a front inclined pushing surface matched with the rear inclined pushing surface, and the front mold respectively pushes the left inclined mold and the right inclined mold to move through the left inclined pushing block and the right inclined pushing block.

5. The injection mold for the hair dryer shell as claimed in claim 2, wherein a push plate is arranged in the middle of the rear mold, and the push plate straddles the retraction mechanism and can push the product out of the rear mold along the outer contour of the retraction mechanism.

6. The injection mold for the hair dryer shell as claimed in claim 4, further comprising a movable plate, wherein the movable plate is provided with a mounting block, the mounting block is provided with a fastening groove along a central line of the internal telescoping mechanism, the end of the telescopic flap is disposed on the fastening groove, the push plate is fixedly connected to the movable plate through a fixing rod, and the movable plate is used for pushing the telescopic flap and the push plate and pushing out the product.

7. The injection mold for the hair dryer shell according to claim 1, further comprising a lower mold arranged at the bottom of the rear mold, wherein a bottom concave mold is arranged at the top of the lower mold, and a concave surface matched with the bottom concave mold is arranged at the bottom of the first male mold.

8. The injection mold for the hair dryer shell as claimed in claim 1, wherein limiting strips are arranged on two sides of the traveling path of the left inclined mold and the right inclined mold.

9. An injection molding method of an injection mold of an electric hair drier shell is characterized by comprising the following steps:

10. The injection molding method of the injection mold of the hair dryer shell according to claim 1, wherein in the step a, the front mold is provided with a left inclined pushing block and a right inclined pushing block, and the left inclined pushing block and the right inclined pushing block respectively push the left inclined mold and the right inclined mold to move through the front inclined pushing surface.