CN216941603U

CN216941603U - Injection moulding mould in mould of easy diaphragm location

Info

Publication number: CN216941603U
Application number: CN202122837341.2U
Authority: CN
Inventors: 周前铁; 辛正发
Original assignee: Tongda Shishi Technology Co ltd
Current assignee: Tongda Shishi Technology Co ltd
Priority date: 2021-11-16
Filing date: 2021-11-16
Publication date: 2022-07-12
Anticipated expiration: 2031-11-16

Abstract

The utility model relates to an in-mold injection molding mold easy for membrane positioning, which comprises a female mold and a male mold, wherein a positioning mechanism comprises a positioning taper pin, a reset spring and a strong magnet, the positioning taper pin is tightly matched and installed in a female mold core in a vertical translation mode, the top surface of the female mold core is provided with an upper limiting structure, the end part of the lower end of the positioning taper pin is convexly provided with a puller head, a push rod is arranged in the female mold plate, the reset spring is sleeved outside the push rod, the push rod and the female mold plate are provided with lower limiting structures, the top surface of the male mold core is concavely provided with a containing groove corresponding to the puller head, and the strong magnet is fixed on the groove bottom of the containing groove. This novel mould injection moulding mould in mould utilizes the tight head in top can be located the border of die cavity side to the diaphragm in the injection moulding mould and plays the positioning action, and positioning mechanism does not set up on the die cavity face of mould, can be applicable to not unidimensional injection moulding mould, does not receive the size influence of injection moulding mould die cavity face, and the installation suitability is strong, has improved the product production yield.

Description

Injection moulding mould in mould of easy diaphragm location

Technical Field

The utility model relates to a forming die, in particular to an injection molding die.

Background

The English abbreviation of IMD (In-Mold Decoration) In-Mold injection surface Decoration technology is a processing technology for surface Decoration of plastic parts manufactured In large scale; the technological process includes hot pressing and forming the film with printed pattern, cutting to form, setting the film inside an injection mold, injecting resin for forming into the injection mold to combine the film with the resin and to form the film with printed pattern and the resin into one integral and curing to form the product; therefore, the surface of the IMD product is a layer of hardened transparent film, the middle part is a printing pattern layer, and the back surface is a plastic layer; the plastic part produced by the method has the advantages of beautiful appearance, various colors and patterns, wear resistance compared with a shell of a spraying process, high brightness, strong stereoscopic impression, and capability of keeping bright color for a long time and preventing fading; dustproof and good moisture resistance. IMD is the surface decoration technique of the present international trend, this kind of processing technique has been applied to the production field of electron, electrical apparatus shell extensively, mainly apply to the surface decoration and functional panel of the household electrical appliances, commonly use on the cell-phone window lens and shell, washing machine control panel, refrigerator control panel, air conditioner control panel, car dashboard, electric cooker control panel many fields of the panel, mark and so on appearance piece.

This kind of decoration panel is adding man-hour, diaphragm hot briquetting, form and have the panel and be in the closed loop side wall in the panel outside, this diaphragm shaping back is cut and is put in injection mold, the error diaphragm of because of processing hardly coincide with injection mold completely after the shaping, the diaphragm appears easily after putting into the mould die cavity that the diaphragm lies in the condition that the chamber side position appears and pops up, can crush the diaphragm during the compound die and lead to the product bad, consequently, IMD technology is more crucial problem how to fix a position when putting into injection mold die cavity with hot briquetting and cut the appearance diaphragm, traditional diaphragm location always is a big difficult problem in the mould design process, need design positioning mechanism in injection mold when the mould design, with fixed diaphragm position in the injection mold die cavity. At present, conventionally, a diaphragm is positioned by arranging a transversely-translated slide block assembly on a cavity side, namely, a slide block slides to the side wall of the diaphragm on the cavity side and is matched with the bottom surface of the side wall of the diaphragm in an attaching manner to position the diaphragm, and the slide block assembly is driven by an oil cylinder or a spring; before die assembly, the sliding block component is reset firstly, and plays a role of clamping and fixing the diaphragm when the diaphragm is placed; however, when the cavity position is very narrow, the slider assembly may not have a spatial arrangement, and thus there is no more reasonable positioning measure for positioning the film in the mold in the molding mold with a local narrow space, resulting in a low production yield.

Accordingly, the present inventors have made extensive studies on the above problems, and as a result, the present invention has been made.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide an in-mold injection molding mold which is convenient for positioning a diaphragm, a positioning mechanism is not limited by the space position of the mold, and the production yield is high, so that the diaphragm is easy to position.

In order to achieve the above object, the solution of the present invention is as follows:

an in-mold injection molding mold easy for membrane positioning comprises a female mold and a male mold positioned below the female mold, wherein the female mold is provided with a female mold plate and a female mold core positioned in the female mold plate, the male mold is provided with a male mold plate and a male mold core positioned in the male mold plate, an upper molding mold cavity is concavely arranged on the bottom surface of the female mold core, the top surface of the male mold protrudes into a mold core structure in the upper molding mold cavity, and a positioning mechanism for membrane positioning is installed on the cavity side of the female mold positioned in the upper molding mold cavity; the positioning mechanism comprises a positioning inclined pin, a reset spring and a strong magnet, the positioning inclined pin is obliquely arranged in the direction of an upward forming die cavity, the positioning inclined pin is tightly matched and arranged in a female die core in a vertical translation mode, the top surface of the female die core is provided with an upper limiting structure for limiting the positioning inclined pin to be upwards separated from the female die core, the end part of the lower end of the positioning inclined pin is convexly provided with a puller head which extends into the side of the upper forming cavity and can be tightly propped against the bottom surface of the side wall of a membrane in the upper forming die cavity, one side surface of the puller head facing the upper forming die cavity is an inclined surface which is inclined downwards from inside to outside, a push rod which can vertically translate and passes through the upper limiting structure to push the positioning inclined pin to move downwards is arranged in the female die plate, the reset spring is sleeved outside the push rod and tensioned between the upper end part of the push rod and the upper limiting structure, and the lower limiting structure for limiting the downward movement of the push rod is arranged on the upper end of the push rod and the female die plate, the push rod is in push fit with the upper end part of the positioning taper pin, an accommodating groove matched with the jacking head is recessed in the position, corresponding to the jacking head, of the top surface of the core insert, the powerful magnet is fixed on the groove bottom of the accommodating groove, and the powerful magnet is in magnetic attraction fit with the jacking head.

The bottom of the containing groove is provided with a concave mounting recess matched with the strong magnet, the core insert is internally provided with a communicating hole, the upper end of the communicating hole is communicated with the mounting recess, the lower end of the communicating hole passes through the bottom surface of the core insert, a fixing pin is arranged in the communicating hole, the strong magnet is locked with the fixing pin through a fixing screw, and the head of the fixing screw sinks in the strong magnet.

The cavity side of the upper molding cavity in the cavity core is externally provided with inclined pin holes which extend along the vertical direction and penetrate through the upper end and the lower end of the cavity core, the positioning inclined pin is a square rod body, one surface of the positioning inclined pin facing the upper molding cavity and one surface of the positioning inclined pin backing the upper molding cavity are inclined planes inclined towards the upper molding cavity, the lower end part of the positioning inclined pin extends downwards to form an extending part extending out of the inclined pin hole, one surface of the extending part facing the upper molding cavity is convexly provided with a square block body, one surface of the square block body facing the upper molding cavity is an inclined plane, the square block body is the jacking head, and the inclination angles of the three inclined planes are the same.

The top surface of the cavity insert is recessed with an expanding recess, the inclined pin hole is located in the expanding recess, the upper limiting structure comprises a limiting block and a mounting nut, the limiting block is a bar-shaped block, the bar-shaped block is embedded in the expanding recess and is locked on the cavity insert through the mounting nut, the bottom surface of the positioning inclined pin is matched with the bottom surface of the limiting block in an attached mode, the limiting block is provided with a through hole which penetrates through the limiting block from top to bottom, and the lower end of the push rod penetrates through the through hole to be matched and connected with the upper portion of the positioning inclined pin.

The top surface of the positioning angle pin is recessed with a mounting recess, and the lower end part of the push rod extends downwards to form an embedded narrow rod which is embedded in the mounting recess tightly.

The female die plate is internally provided with a channel which vertically penetrates through the upper side and the lower side of the female die plate, the channel is provided with an upper expanding section, a reducing section and a lower expanding section, the upper part of the return spring is positioned in the upper expanding section, the lower part of the return spring is positioned in the reducing section, the lower part of the limiting block is positioned in the expanding recess, the upper part of the limiting block is positioned in the lower expanding section, and the lower limiting structure is arranged in the upper expanding section.

The upper end part of the push rod is provided with a head part, the upper end of the push rod is sleeved with a limit head which is vertically overlapped and matched with the head part, the reset spring is tensioned between the limit head and the limit block, the outer diameter of the limit head is larger than the inner diameter of the reducing section, a step is formed between the upper expanding section and the reducing section, and the limit head and the step form the lower limit structure.

After the technical scheme is adopted, the in-mold injection molding mold easy for positioning the membrane is characterized in that when the membrane is installed, the pushing rod is pushed to translate downwards, the pushing rod moves downwards to push the positioning inclined pin to move downwards, the reset spring is compressed, the pushing head and the cavity bottom of the upper molding cavity form a space for abdicating, so that the membrane is not limited by the pushing head when being placed, after the membrane is placed, the pushing rod is released, the reset spring resets, the positioning inclined pin resets, the pushing head moves upwards to be tightly attached to the upper side and the lower side of the side wall of the side cavity of the membrane in the upper molding cavity, the inverted buckle at the side of the cavity of the upper molding cavity is embedded between the side wall of the membrane and the positioning inclined pin, so that the membrane is buckled, the situation that the membrane is positioned in the cavity chamber and is prevented from being raised elastically, after the membrane is installed, the female mold core and the male mold core are assembled, the pushing head extends into the accommodating groove and is tightly attached to the outer side of the mold core structure and is inserted with glue, the injection molding is realized, and the puller is attracted by a strong magnet; after injection molding is finished, the female die core is moved upwards to be demolded, when the film is opened to 2mm, the magnetic force of the strong magnet is larger than the elastic force of the reset spring, so that the positioning inclined pin is stopped on the male die together with a product under the pull-down force of the strong magnet, and the reset spring is compressed; when the female die moves to 5mm, the back-off on the female die is completely separated from a product, when the female die moves to 8mm, the back-off is limited by the influence of the lower limit structure, the female die cannot move upwards relative to the push rod, the upward pulling force of the female die is far greater than the suction force of the powerful magnet, the female die and the push rod move upwards together, when the female die moves upwards to 9mm, the positioning taper pin is completely separated from the powerful magnet, the jacking head is separated from the accommodating groove and separated from the male die core, the positioning taper pin is separated from the male die core, the restoring force of the restoring spring pushes the push rod to move downwards to be restored, and the positioning taper pin correspondingly resets to the initial position to perform the operation of the next cycle period. Compared with the prior art, this neotype mould injection moulding mould in, the tight head in top that utilizes positioning mechanism can be located the border of die cavity side to the diaphragm in the injection moulding mould and play the positioning action, can not make the diaphragm appear playing the phenomenon of sticking up, and positioning mechanism partly sets up in the female mold, another part sets up in the male mold, the die cavity off-plate surface position that need not to occupy the mould, can be applicable to not unidimensional injection moulding mould, do not receive the size influence of injection moulding mould die cavity face, the installation suitability is strong, the specially adapted die cavity face is the injection moulding mould in narrow and small space, the production yield of the injection moulding mould of this kind of size has been improved greatly.

Drawings

FIG. 1 is a schematic view of a clamping structure of the present invention;

FIG. 2 is a schematic view of the positioning mechanism and the finished product of the present invention;

FIG. 3 is a schematic view of the mold opening structure of the female mold of the present invention;

FIG. 4 is a schematic view of the present invention in a state of being opened to 6 mm;

FIG. 5 is a schematic view of the present invention in a state of being opened to 9 mm;

FIG. 6 is a schematic view of the mold opening structure of the present invention.

Detailed Description

In order to further explain the technical solution of the present invention, the present invention is explained in detail by the following specific examples.

The utility model discloses an in-mold injection molding mold easy for membrane positioning, which comprises a female mold and a male mold positioned below the female mold, wherein the female mold is provided with a female mold plate 11 and a female mold core 12 positioned in the female mold plate, the male mold is provided with a male mold plate 21 and a male mold core 22 positioned in the male mold plate, the bottom surface of the female mold core 12 is concavely provided with an upper molding mold cavity, the top surface of the male mold protrudes into a mold core structure in the upper molding mold cavity, and a positioning mechanism for membrane positioning is arranged on the cavity side of the female mold positioned in the upper molding mold cavity. In the present invention, the structures of the female mold and the male mold are well known and will not be repeated herein.

The novel innovation point is as follows: the positioning mechanism comprises a positioning inclined pin 3, a reset spring 4 and a strong magnet 5, the positioning inclined pin 3 is obliquely arranged in the direction of an upward forming die cavity, the positioning inclined pin is tightly matched and arranged in the female die core 12 in a vertical translation mode, the end part of the lower end of the positioning inclined pin 3 is convexly provided with a puller head 31 which extends into the die cavity side of the upper forming die cavity and can be abutted against the bottom surface of the side wall of the diaphragm 100 in the upper forming die cavity, one side of the puller head 31 facing the upper forming die cavity is an inclined plane which is inclined downwards from inside to outside, preferably, inclined pin holes (not shown in the figure) which extend along the vertical direction and penetrate through the upper end and the lower end of the female die core 12 are arranged outside the die cavity side of the upper forming die cavity in the female die core 12, the positioning inclined pin 3 is a square rod body, one side of the positioning inclined pin 3 facing the upper forming die cavity (namely, the left side of the positioning inclined pin 3) and one side of the back of the upper forming die cavity (namely, the right side of the positioning inclined pin 3) are inclined planes which are inclined planes of the upward forming die cavity, namely, the upper part of the inclined plane is positioned at the left side of the lower part of the inclined plane, the inclination of the two inclined planes is consistent, preferably, the inclination of the inclined plane is 5 degrees, the lower end part of the positioning angle pin 3 extends downwards to form an extension part extending out of an angle pin hole, the extension part faces one surface of the upper forming die cavity and is convexly provided with a square block body, namely, the extension part correspondingly forms a square rod body, the left side surface of the extension part faces the left side and is convexly provided with a square block body, one surface (namely, the left side surface) of the square block body facing the upper forming die cavity is an inclined plane, the left side of the square block body slightly extends into the upper forming die cavity, the width of the square block body extending into the upper forming die cavity is 0.3-0.4mm, the square block body is the tightening head 31, and the inclined plane of the tightening head is consistent with the inclined plane inclination direction and the inclination angle of the positioning angle pin 3.

The top surface of the cavity insert 12 is provided with an upper limiting structure for limiting the positioning taper pin 3 to be separated from the cavity insert 12 upwards, the top surface of the cavity insert 12 is recessed with an expanding recess (not shown in the figure), the taper pin hole is positioned in the expanding recess, the upper limiting structure comprises a limiting block 61 and a mounting nut 62, the limiting block 61 is a strip-shaped block extending along the left and right direction, the strip-shaped block is embedded in the expanding recess and is locked in the expanding recess of the cavity insert 12 through the mounting nut 62, the bottom surface of the positioning taper pin is matched with the bottom surface of the limiting block in an attached manner, and the positioning taper pin 3 cannot move upwards by utilizing the size of the strip-shaped block larger than the outer diameter of the positioning taper pin 3.

A push rod 7 which can move up and down and passes through the upper limiting structure to the position of the positioning inclined pin 3 to push the positioning inclined pin to move downwards is arranged in the female die plate 11, a return spring 4 is sleeved outside the push rod 7 and is tensioned between the upper end part of the push rod 7 and the upper limiting structure, a lower limiting structure which limits the downward movement stroke of the push rod is arranged on the upper end of the push rod 7 and the female die plate 11, and the push rod 7 is in push fit with the upper end part of the positioning inclined pin 3; excellent is, offer the hole (not shown in the figure) that passes through from top to bottom on the stopper 61, the lower tip of catch bar 7 passes stopper 61 and the cooperation of pasting of the top surface of location taper pin 3 through passing the hole, the concave installation sunken 32 that has of top surface of location taper pin 3, this installation sunken be along the bar groove of upper and lower direction extension, the lower tip downwardly extending of catch bar 7 has to inlay tightly in the sunken embedded tight footpath pole 71 that contracts of installation, utilize to inlay to realize being connected of catch bar and location taper pin 3 with the sunken 32 tight fit of installation.

A containing groove 221 matched with the puller is formed in the position, corresponding to the puller, of the top surface of the male die core 22, a strong magnet 5 is fixed on the bottom of the containing groove 221, and the strong magnet is in magnetic attraction fit with the puller; preferably, the positioning taper pin and the tightening head are both metal pieces and can be attracted and matched with the powerful magnet 5, the groove width of the accommodating groove 221 is larger than the maximum outer diameter of the tightening head 31, an installation recess (not shown in the figure) matched with the powerful magnet is recessed in the groove bottom of the accommodating groove 221, a communication hole (not shown in the figure) is formed in the male die core 22, the upper end of the communication hole is communicated with the installation recess, the lower end of the communication hole passes through the bottom surface of the male die core, a fixing needle 8 is installed in the communication hole, an expanding limiting head is arranged at the bottom of the fixing needle 8, a limiting groove is recessed upwards at the position, of the lower bottom surface of the male die core, the fixing needle 8 cannot move upwards by the cooperation of the expanding limiting head and the limiting groove, the powerful magnet 5 is locked with the fixing needle 8 through the fixing screw 9, and the head of the fixing screw 9 sinks in the powerful magnet.

The female die plate 11 is internally provided with a channel 111 which vertically penetrates through the upper side and the lower side of the female die plate, the channel 111 is provided with an upper diameter expanding section, a diameter reducing section and a lower diameter expanding section, the upper part of the reset spring 4 is positioned in the upper diameter expanding section, a step is formed between the upper diameter expanding section and the diameter reducing section, the lower part of the reset spring 3 is positioned in the diameter reducing section, the lower part of the limit block 61 is positioned in the diameter expanding recess, the upper part of the limit block 61 is positioned in the lower diameter expanding section, the upper end part of the push rod 7 is provided with a head part 72, the upper end of the push rod 7 is tightly sleeved with a limit head 73, the limit head is positioned in the upper diameter expanding section, the limit head 73 is overlapped below the head part 72, the outer diameter of the limit head 73 is larger than the inner diameter of the diameter reducing section, the reset spring 4 is tensioned between the limit head 73 and the limit block 61, and the limit head 73 and the step form the lower limit structure.

The utility model relates to an in-mold injection molding mold easy for positioning a membrane, initially, a reset spring 4 is expanded, the upper end surface of a puller head 31 of a positioning inclined pin 3 is just attached and matched with the cavity surface of an upper mold core 12, the left side of the puller head 31 slightly extends into an upper molding cavity, when the membrane 100 is installed, a push rod 7 is pushed downwards firstly, at the moment, the push rod 7 moves downwards to push the positioning inclined pin 3 to move downwards, the reset spring 4 is compressed, a yielding space is formed between the left side of the puller head 31 and the cavity bottom of the upper molding cavity, so that the membrane 100 is not limited by the puller head when placed, after the membrane is placed, the push rod 7 is released, the reset spring 4 is reset, the positioning inclined pin 3 is reset, the puller head 31 moves upwards to be attached to the upper side and lower side of the side wall of the membrane 100 positioned at the cavity side in the upper molding cavity, an inverted buckle at the upper mold core at the upper molding cavity side is embedded into the space between the side wall of the membrane 100 and the positioning inclined pin 121, the diaphragm 100 is buckled by the puller head 31, the diaphragm is prevented from being raised in the cavity chamber, after the diaphragm is installed, the female die core and the male die core are assembled, the puller head 31 extends into the accommodating groove 221 and is closely adhered to the outer side of the die core structure to be inserted into the sealing compound, injection molding is carried out, and the puller head 31 is attracted by the strong magnet 5; after the injection molding is finished, the female die core 12 moves upwards to be demolded, when the film is opened to 2mm, the magnetic force of the strong magnet 5 is larger than the elastic force of the return spring 4, so that the positioning inclined pin 3 is attracted by the strong magnet 5 and cannot move upwards along with the upper die core, has a downward pulling force and stays on the male die core 22 together with the product 200, and the return spring 4 is compressed by the upward movement of the upper die core and the upper die plate; when the female die moves to 5mm, the back-off 121 on the female die is completely separated from the product 200, when the female die moves to 8mm, the female die cannot move upwards relative to the push rod under the limitation of the positioning head 73, the pull-up force of the female die is far greater than the suction force of the powerful magnet 5, the push rod 7 can only move upwards together with the female die, at the moment, the positioning taper pin can move backwards by 0.7mm when moving upwards by utilizing the bevel structure on the left side surface of the puller head, and the part of the puller head extending into the finished product 200 is 0.3-0.4mm, so that the positioning taper pin 3 cannot collide with the outer side wall of the finished product 200 when moving upwards along with the female die; when the female die moves upwards to 9mm continuously, the positioning taper pin 3 is separated from the strong magnet 5 and correspondingly separated from the male die core 22, the puller head is separated out of the accommodating groove and separated from the male die core, meanwhile, the restoring force of the restoring spring 4 pulls the push rod 7 to move downwards for restoring, and the puller head restores to the initial position, so that the operation of the next cycle period can be carried out. Compared with the prior art, this neotype mould injection moulding mould in, the tight head in top that utilizes positioning mechanism can play the positioning action to the border that the diaphragm in the injection moulding mould is located the die cavity side, can not make the diaphragm appear the phenomenon of bullet perk, and positioning mechanism partly sets up in female mould, another part sets up in public mould, the die cavity off-plate surface position that need not to occupy the mould, can be applicable to not unidimensional injection moulding mould, do not receive the size influence of injection moulding mould die cavity face, the installation suitability is strong, the injection moulding mould that the specially adapted die cavity face is narrow and small space, the production yield of this kind of size injection moulding mould has been improved greatly.

The above embodiments and drawings are not intended to limit the method and shape of the clamp of the present invention, and any suitable changes or modifications thereof by one of ordinary skill in the art should be considered without departing from the scope of the present invention.

Claims

1. An in-mold injection molding mold easy for membrane positioning comprises a female mold and a male mold positioned below the female mold, wherein the female mold is provided with a female mold plate and a female mold core positioned in the female mold plate, the male mold is provided with a male mold plate and a male mold core positioned in the male mold plate, an upper molding mold cavity is concavely arranged on the bottom surface of the female mold core, the top surface of the male mold protrudes into a mold core structure in the upper molding mold cavity, and a positioning mechanism for membrane positioning is installed on the cavity side of the female mold positioned in the upper molding mold cavity; the method is characterized in that: the positioning mechanism comprises a positioning inclined pin, a return spring and a strong magnet, the positioning inclined pin is obliquely arranged in the direction of an upward forming die cavity, the positioning inclined pin is tightly installed in a cavity insert in a vertically translation mode, an upper limiting structure for limiting the positioning inclined pin to be upwards separated from the cavity insert is arranged on the top surface of the cavity insert, a puller head which extends into the side of an upper forming cavity chamber and can be tightly propped against the bottom surface of the side wall of a diaphragm in the upper forming die cavity is convexly arranged at the lower end part of the positioning inclined pin, one side surface of the puller head facing the upper forming die cavity is an inclined plane which is downwards inclined from inside to outside, a push rod which can vertically translate and passes through the upper limiting structure to the positioning inclined pin to push the positioning inclined pin to downwards move is arranged in the cavity insert, the return spring is sleeved outside the push rod and tensioned between the upper end part of the push rod and the upper limiting structure, and a lower limiting structure for limiting the downward moving stroke of the push rod is arranged on the upper end of the push rod and the cavity insert, the push rod is in push fit with the upper end part of the positioning taper pin, an accommodating groove matched with the puller head is concavely arranged at the position, corresponding to the puller head, of the top surface of the core insert, the strong magnet is fixed on the bottom of the accommodating groove, and the strong magnet is in magnetic attraction fit with the puller head.

2. The in-mold injection mold for easy positioning of a membrane according to claim 1, wherein: the bottom of the containing groove is provided with a mounting recess matched with the powerful magnet, the core insert is internally provided with a communicating hole, the upper end of the communicating hole is communicated with the mounting recess, the lower end of the communicating hole passes through the bottom surface of the core insert, a fixing pin is arranged in the communicating hole, the powerful magnet is locked with the fixing pin through a fixing screw, and the head of the fixing screw sinks in the powerful magnet.

3. The in-mold injection mold for easy positioning of a membrane according to claim 1, wherein: the cavity side of the upper molding cavity in the cavity core is externally provided with inclined pin holes which extend along the vertical direction and penetrate through the upper end and the lower end of the cavity core, the positioning inclined pin is a square rod body, one surface of the positioning inclined pin facing the upper molding cavity and one surface of the positioning inclined pin backing the upper molding cavity are inclined planes inclined towards the upper molding cavity, the lower end part of the positioning inclined pin extends downwards to form an extending part extending out of the inclined pin hole, one surface of the extending part facing the upper molding cavity is convexly provided with a square block body, one surface of the square block body facing the upper molding cavity is an inclined plane, the square block body is the jacking head, and the inclination angles of the three inclined planes are the same.

4. An in-mold injection molding mold for easy positioning of a membrane according to claim 3, wherein: the top surface of the cavity insert is recessed with an expanding recess, the inclined pin hole is located in the expanding recess, the upper limiting structure comprises a limiting block and a mounting nut, the limiting block is a bar-shaped block, the bar-shaped block is embedded in the expanding recess and is locked on the cavity insert through the mounting nut, the bottom surface of the positioning inclined pin is matched with the bottom surface of the limiting block in an attached mode, the limiting block is provided with a through hole which penetrates through the limiting block from top to bottom, and the lower end of the push rod penetrates through the through hole to be matched and connected with the upper portion of the positioning inclined pin.

5. The in-mold injection mold for easy positioning of a membrane according to claim 4, wherein: the top surface of the positioning angle pin is recessed with a mounting recess, and the lower end part of the push rod extends downwards to form an embedded diameter-reducing rod tightly embedded in the mounting recess.

6. The in-mold injection mold for easy positioning of a membrane according to claim 4, wherein: the female die plate is internally provided with a channel which vertically penetrates through the upper side and the lower side of the female die plate, the channel is provided with an upper expanding section, a reducing section and a lower expanding section, the upper part of the return spring is positioned in the upper expanding section, the lower part of the return spring is positioned in the reducing section, the lower part of the limiting block is positioned in the expanding recess, the upper part of the limiting block is positioned in the lower expanding section, and the lower limiting structure is arranged in the upper expanding section.

7. The in-mold injection mold for easy positioning of a membrane according to claim 6, wherein: the upper end part of the push rod is provided with a head part, the upper end of the push rod is sleeved with a limiting head which is vertically overlapped and matched with the head part, the reset spring is tensioned between the limiting head and the limiting block, the outer diameter of the limiting head is larger than the inner diameter of the reducing section, a step is formed between the upper expanding section and the reducing section, and the limiting head and the step form the lower limiting structure.