CN108556265B

CN108556265B - Mold assembly

Info

Publication number: CN108556265B
Application number: CN201810306904.5A
Authority: CN
Inventors: 戈明; 商君
Original assignee: Kunshan Jiahua Automotive Electronic Technology Co ltd
Current assignee: Kunshan Jiahua Automotive Electronic Technology Co ltd
Priority date: 2018-04-08
Filing date: 2018-04-08
Publication date: 2023-12-22
Anticipated expiration: 2038-04-08
Also published as: CN108556265A

Abstract

The invention provides a die assembly for fixing a hardware pin to injection mold a plastic seat around the hardware pin, the die assembly comprises a positioning die, and the positioning die comprises: a first base; a second base cooperating with the first base in a first direction; the positioning insert is fixed in the first base and exposed from the first side of the first base, and is provided with a pinhole penetrating in the first direction for positioning the hardware pin; an elastic element disposed between the first base and the second base in a first direction; the ejection insert penetrates through the positioning insert in the first direction and is fixed in the second base; the first base and the second base are far away from or close to each other in a first direction through the expansion and contraction of the elastic element, so that the ejection insert is driven to expand and contract in the positioning insert. The arrangement avoids the situation that the hardware contact pin is pressed against and deformed during die assembly, and defective products are caused by embedding the contact in residual plastic in the injection molding process.

Description

Mold assembly

Technical Field

The invention relates to the technical field of dies, in particular to a die assembly.

Background

In traditional die sinking structure, the contact pin is vertical to be placed in the mould, and preceding back mould carries out the compound die or the die sinking in upper and lower direction, if the contact pin is put when slightly misplacement, can not get into protruding 0.3mm height straight body cooperation position and press the contact pin when can leading to the front mould compound die for the contact pin warp, and the contact pin warp the back, and the surface that needs to expose can be covered by the plastic and lead to the defective products to produce. In addition, the small step of 0.3mm matched with the straight body of the contact pin is very easy to damage steel materials due to long-term bad collision matching.

Accordingly, there is a need to provide an improved mold assembly that solves the above-described problems.

Disclosure of Invention

The invention aims to provide a die assembly capable of preventing hardware pins from being pressed and deformed during die assembly.

To achieve the above object, the present invention provides a mold assembly for fixing a hardware pin to injection mold a plastic housing around the hardware pin, having a first side and a second side in a first direction, the mold assembly including a positioning mold, the positioning mold including: the first base is provided with a containing cavity penetrating through the first side; a second base cooperating with the first base in a first direction; the positioning insert is fixed in the accommodating cavity of the first base and exposed from the first side of the first base, and is provided with a needle hole which penetrates through in the first direction and is used for positioning the hardware pin; an elastic element disposed between the first and second bases in a first direction; the ejection insert penetrates through the positioning insert in the first direction and is fixed in the second base; the first base and the second base are far away from or close to each other in a first direction through the expansion and contraction of the elastic element, and the ejection insert is driven to expand and contract in the positioning insert.

As a further improvement of the invention, the positioning die is further provided with a guide element for limiting the movement direction of the first base and the second base, and the guide element penetrates through the first base and the second base in the first direction and is fixed in the second base, so that the guide element moves relatively to the first base in the first direction.

As a further improvement of the present invention, the positioning die further has a fixing member that fixes the ejection insert, the fixing member penetrating the first base and being fixed in the second base.

As a further improvement of the present invention, the mold assembly further has a limit screw disposed between the first and second bases to position the first and second bases.

As a further improvement of the invention, the first base comprises a first base body and a second base body which are matched with each other, the second base comprises a third base body and a fourth base body which are matched with each other, the positioning insert penetrates through the first base body, the ejection insert penetrates through the first base body, the second base body and the third base body and is abutted by the fourth base body, and the fixing piece is provided with a clamping part which is clamped and fixed in the third base body.

As a further improvement of the present invention, the mold assembly further has a fixed mold including a first fixed seat and a second fixed seat that are mutually matched in a first direction, a fixed insert accommodated in the accommodating cavity, a movable insert disposed in the fixed insert for abutting the positioning hardware insert, and an operation assembly disposed on a first side of the second fixed seat and abutting the movable insert in the first direction; the first fixing seat is provided with a containing cavity penetrating in a first direction, the fixing insert is exposed from a second side part of the first fixing seat, and the operation assembly is provided with an elastic assembly; the operation assembly drives the movable insert pin to stretch and retract relative to the fixed insert through stretching and retracting of the elastic assembly.

As a further improvement of the present invention, the tail end of the movable insert pin has an abutment portion protruding outward, and the head end of the movable insert pin is pushed out of the fixed insert until the abutment portion abuts against the rear end surface of the fixed insert to be stopped.

As a further improvement of the invention, the operation assembly comprises a moving block arranged on the second side of the fixed insert and a pressing plate fixed on the second fixed seat, the elastic assembly is arranged between the moving block and the pressing plate, the moving block is abutted against the movable insert needle, and the moving block is far away from or close to the pressing plate due to expansion and contraction driving of the elastic assembly, so that the movable insert needle is expanded and contracted.

As a further improvement of the invention, the second fixing seat is provided with an accommodating space for accommodating the operation assembly and a moving space communicated with the accommodating space and the accommodating cavity, and the height of the accommodating space is larger than that of the moving space in a second direction perpendicular to the first direction.

As a further improvement of the present invention, the intersection of the storage space and the moving space has a partition wall, the moving block has a moving portion stored in the moving space and a fixed block stored in the storage space, and the fixed block abuts against a first side of the partition wall.

The beneficial effects of the invention are as follows: according to the invention, the elastic element, the ejection insert matched with the movable hardware pin and the positioning insert for accommodating the ejection insert are arranged on the positioning die for positioning the hardware pin, so that the hardware pin is driven to retract into the positioning insert successively through the elastic element matched with the ejection insert during die assembly, the ejection insert is controlled by elasticity after die assembly to drive the hardware pin to return to the original position, and the problem that the hardware pin is pressed and deformed during die assembly, and defective products are caused by embedding contacts in residual plastic in the injection molding process is avoided.

Drawings

FIG. 1 is a perspective view of a mold assembly of the present invention mated with a hardware pin, a row seat and a mold insert.

Fig. 2 is a schematic perspective view of the mold assembly of the present invention mated with a hardware pin to remove the slide and insert.

Fig. 3 is a schematic perspective view of fig. 2 from another direction.

Fig. 4 is a schematic perspective view of a positioning die of the die assembly of the present invention with a positioning hardware pin separated from a stationary die.

Fig. 5 is a schematic perspective view of fig. 4 from another direction.

Fig. 6 is a partially exploded perspective view of a positioning die and hardware pin of the die assembly of the present invention.

Fig. 7 is a partially exploded perspective view of fig. 6 from another direction.

Fig. 8 is an exploded perspective view of a positioning die and hardware pins of the die assembly of the present invention.

Fig. 9 is a partially exploded perspective view of a stationary mold of the mold assembly of the present invention.

Fig. 10 is another partially exploded perspective view of a stationary mold of the mold assembly of the present invention.

Fig. 11 is an exploded perspective view of a stationary mold of the mold assembly of the present invention.

Fig. 12 is an exploded perspective view of fig. 11 from another direction.

Fig. 13 is a cross-sectional view of a die assembly positioning hardware pin of the present invention.

DETAILED DESCRIPTION OF EMBODIMENT (S) OF INVENTION

The present invention will be described in detail below with reference to embodiments shown in the drawings. However, these embodiments are not intended to limit the present invention, and structural or functional modifications thereof by those skilled in the art are intended to be included within the scope of the present invention.

Referring to fig. 1 to 13, the mold assembly 300 of the present invention is used for fixing the hardware pin 400 to injection mold a plastic base around the hardware pin 400, and the mold assembly 300 has a first side and a second side in a first direction. The die assembly 300 includes a positioning die 100 and a stationary die 200 that cooperate to position the hardware pin 400.

Referring to fig. 1 to 8 and 13, the positioning mold 100 includes a first base 11, and the first base 11 has a receiving cavity 110 penetrating through a first side; a second base 12 that is fitted to the first base 11 in a first direction; a positioning insert 2 fixed in the receiving cavity 110 of the first base 11 and exposed from a first side of the first base 11, the positioning insert 2 having a pinhole 20 penetrating in a first direction for positioning the hardware pin 400; an elastic element 3 disposed between the first base 11 and the second base 12 in a first direction; and an ejector insert 4 penetrating the positioning insert 2 in a first direction and fixed in the second base 12; the first base 11 and the second base 12 are separated from or close to each other in the first direction by the expansion and contraction of the elastic element 3, so as to drive the ejection insert 4 to expand and contract in the positioning insert 2. Thus avoiding being pressed against deformation by the mold core due to dislocation of the hardware pin 400 in the mold assembly process.

In this application, when the hardware pin 400 is positioned on the positioning insert 2, three hardware pins are arranged in sequence in a second direction perpendicular to the first direction, and each hardware pin has a main body portion 401 extending along the first direction and a contact 402 extending from one end of the main body portion 401 in a vertically bent manner. The number of the ejection inserts 4 is 3 corresponding to the number of the hardware pins 400, so that the contacts 402 of the hardware pins 400 are respectively and correspondingly attached to the ejection inserts 4, and the contact surface shape of the ejection inserts 4 and the contacts 402 is consistent with the shape of the contacts 402.

The positioning die 100 further has a guide member 5 for defining the movement direction of the first and second bases 11 and 12, a fixing member 6 for fixing the ejection insert 4, and a limit screw 7 provided between the first and second bases 11 and 12 to position the first and second bases 11 and 12. The guide element 5 penetrates the first base 11 and the second base 12 in a first direction and is fixed in the second base 12, so that the guide element 5 only moves relatively to the first base 11 in the first direction. The guide member 5 includes a sleeve 51 fitted in the first direction and a guide needle 52 having one end received in the sleeve 51. The sleeve 51 has a hollow cylindrical structure and a first clamping part 511 which bulges outwards to be clamped in the second base 12, the guide needle 52 has a cylindrical structure and a second clamping part 521 which bulges outwards to be clamped in the first base 11, and the guide needle 52 can move relative to the sleeve 51 in a first direction. The fixing piece 6 penetrates through the first base 11 and is fixed in the second base 12, and the fixing piece 6 corresponds to the first base.

In the preferred embodiment of the present application, the first base 11 includes a first seat 111 and a second seat 112 that are engaged with each other in a first direction, and the second base 12 includes a third seat 121 and a fourth seat 122 that are engaged with each other in the first direction.

The first housing 111 has a first through hole 113 penetrating in a first direction to accommodate the positioning insert 2 and a second through hole 114 through which the guide pin 52 of the guide element 5 passes. The second clamping portion 521 is completely accommodated in the second through hole 114. The second through holes 114 are correspondingly disposed at both sides of the first through hole 113 in a third direction perpendicular to the first direction and the second direction. The second through hole 114 has a first aperture and a second aperture respectively located at a first side and a second side of the first housing 111, the first aperture having a smaller size than the second aperture, and the second aperture having a size corresponding to a size of the second catching portion 521 of the guide pin 52. The third seat 121 has a third through hole 123 which passes through the sleeve 51 accommodating the guide element 5 in the first direction and corresponds to the second through hole 114. The first clamping portion 511 is completely accommodated in the third through hole 123. The third through hole 123 has a third aperture and a fourth aperture respectively located on the first side and the second side of the third seat 121, the third aperture having a smaller size than the fourth aperture, and the fourth aperture having a size consistent with the size of the first clamping portion 511 of the sleeve 51.

The second and third housings 112, 121 each have pin relief holes 115, 124 that pass through in the first direction and conform to the shape of the contact 402 of the hardware pin 400. The ejection insert 4 penetrates the pin relief holes 115 and 124 of the first and second and third housings 111 and 112 and the third housing 121, and abuts against the first side of the fourth housing 122. The fixing member 6 has a fixing portion 61 that is fastened and fixed in the third seat 121.

In a preferred embodiment of the present application, the elastic element 2 is a coil spring. The first base 111 has a groove disposed on the second side, the second base 112 and the third base 121 have spring holes 116 and 125 for receiving a coil spring, one end of the coil spring is received in the groove, and the other end of the coil spring is pressed against the first side of the fourth base 122, so as to drive the first base 11 and the second base 12 to be far away from or close to each other, so that the ejector insert 4 drives the hardware pin 400 to perform telescopic motion.

Referring to fig. 9 to 13, the fixed mold 200 includes a first fixed seat 201 and a second fixed seat 202 that are mutually engaged in a first direction, a fixed insert 203 disposed on the first fixed seat 201, a movable insert 204 disposed in the fixed insert 203 for abutting against the positioning hardware insert 400, and an operation assembly 205 disposed on a first side of the second fixed seat 202 and abutting against the movable insert 204 in the first direction.

The first fixing base 201 has a receiving cavity 2011 penetrating in a first direction to receive the fixing insert 203, and the fixing insert 203 is exposed from a second side portion of the first fixing base 201.

The operating assembly 205 has a moving block 2051 disposed on a second side of the fixed insert 203, a pressure plate 2052 fixed to the second fixed mount 202, and an elastic assembly 2053 disposed between the moving block 2051 and the pressure plate 2052. The operation assembly 205 drives the movable insert pin 204 to stretch and retract relative to the fixed insert 203 through the stretch and retraction of the elastic assembly 2053. The second side of the moving block 2051 abuts against the first side of the movable insert 204, and the moving block 2051 is driven by the elastic component 2053 to stretch and retract so as to be far away from or close to the pressing plate 2052, thereby stretching and retracting the movable insert 204.

The first side of the second fixing base 202 is provided with a notch 2021 corresponding to the buckle for fixing the pressing plate 2052. The stationary mold 200 also has screws 206 disposed in a first direction to secure the platen 2052 to the second mount 202. The second side of the pressure plate 2052 has a fixed slot 2054 that correspondingly receives the resilient assembly 2053. The elastic component 2053 includes a positioning column accommodated and fixed in the fixing groove 2054, and a spring wound around the positioning column. The first side of the moving block 2051 is provided with a clamping groove 2055, one end of the positioning column is accommodated and fixed in the clamping groove 2055, and the other end is accommodated and fixed in the fixing groove 2054.

The tail end of the movable insert pin 204 has an abutting portion 2041 protruding outward, and the head end of the movable insert pin 204 is pushed out of the fixed insert 203 to the rear end face of the abutting portion 2041 abutting on the first side of the fixed insert 203 to be stopped.

The second fixing base 202 has a housing space 2021 for housing the operation unit 205, and a moving space 2022 penetrating the housing space 2021 and the housing cavity 2011. In a second direction perpendicular to the first direction, the height of the accommodating space 2021 is greater than the height of the moving space 2022.

The receiving space 2021 and the moving space 2022 have a partition wall 2023 at an intersection. The moving block 2051 includes a moving portion 2056 accommodated in the moving space 2022 and a fixed block 2057 accommodated in the accommodating space 2021, and the fixed block 2057 abuts against a first side of the partition wall 2023.

Before a plastic seat body is injection molded around the hardware pin 400, the hardware pin 400 is placed at the first side surface of the ejection insert 4 of the positioning die 100, the second base 12 is retreated relative to the first base 11 and is far away from the first base 11 through the elasticity of the elastic element 7, so that the ejection insert 4 drives the hardware pin 400 to retreat by 3mm, the positioning die 100 and the hardware pin 400 at the moment are placed in the first row seat 501 together, and then the positioning die 100 and the hardware pin 400 are integrally placed at the corresponding position of the rear die core 602; the fixed die 200 is placed at a position corresponding to the second row of seats 502, and the movable insert pin 204 is adjusted to be in an extended state; the first base 11 of the mold assembly 100 drives the hardware pin 400 to enter the corresponding internal mold position of the rear mold core 602 and then stops moving, and the movable insert 204 abuts against and positions the hardware pin 400; placing the front mold insert 601 at a corresponding position of the mold assembly 300; the second base 12 and the first row seat 501 of the positioning mold 100 continue to move towards the direction approaching to the rear mold core 602 until the hardware pin 400 is driven by the ejection insert 4 to the first side surface of the positioning insert 2, and the movable insert 204 retreats along with the movement, so that the hardware pin 400 is prevented from being ejected out due to die closing impact inertia.

The above list of detailed descriptions is only specific to practical embodiments of the present invention, and they are not intended to limit the scope of the present invention, and all equivalent embodiments or modifications that do not depart from the spirit of the present invention should be included in the scope of the present invention.

Claims

1. A die assembly for fixing a hardware pin to injection mold a plastic housing around the hardware pin, having a first side and a second side in a first direction, the die assembly comprising a positioning die, characterized in that: the positioning die comprises:

the first base is provided with a containing cavity penetrating through the first side;

a second base cooperating with the first base in a first direction;

the positioning insert is fixed in the accommodating cavity of the first base and exposed from the first side of the first base, and is provided with a needle hole which penetrates through in the first direction and is used for positioning the hardware pin;

an elastic element disposed between the first and second bases in a first direction; a kind of electronic device with high-pressure air-conditioning system

An ejector insert penetrating the positioning insert in a first direction and fixed within the second base;

the first base and the second base are mutually far away from or close to each other in a first direction through the expansion and contraction of the elastic element, so that the ejection insert is driven to expand and contract in the positioning insert;

the positioning die is also provided with a guide element used for limiting the movement direction of the first base and the second base, and the guide element penetrates through the first base and the second base in a first direction and is fixed in the second base so as to enable the guide element to move relatively to the first base in the first direction;

the die assembly is further provided with a fixed die, and the fixed die comprises a first fixed seat and a second fixed seat which are mutually matched in a first direction, a fixed insert arranged on the first fixed seat, a movable insert arranged in the fixed insert and used for abutting and positioning the hardware insert pin, and an operation assembly arranged on a first side of the second fixed seat and abutted and connected with the movable insert in the first direction; the first fixing seat is provided with a containing cavity which penetrates through the first fixing seat in a first direction to contain the fixing insert, the fixing insert is exposed from a second side part of the first fixing seat, and the operation assembly is provided with an elastic assembly; the operation assembly drives the movable insert pin to stretch relative to the fixed insert through stretching of the elastic assembly;

the tail end of the movable insert pin is provided with an abutting part protruding outwards, and the head end of the movable insert pin is pushed out of the fixed insert until the abutting part abuts against the rear end surface of the fixed insert and is blocked;

the operation assembly comprises a moving block arranged on the second side of the fixed insert and a pressing plate fixed on the second fixed seat, the elastic assembly is arranged between the moving block and the pressing plate, the moving block is in butt joint with the movable insert, and the moving block is far away from or close to the pressing plate due to telescopic driving of the elastic assembly, so that the movable insert stretches.

2. The mold assembly of claim 1, wherein: the positioning die is further provided with a fixing piece for fixing the ejection insert, and the fixing piece penetrates through the first base and is fixed in the second base.

3. The mold assembly of claim 2, wherein: the mold assembly also has a set screw disposed between the first and second bases to position the first and second bases.

4. A mold assembly according to claim 3, wherein: the first base comprises a first base body and a second base body which are matched with each other, the second base comprises a third base body and a fourth base body which are matched with each other, the positioning insert penetrates through the first base body, the ejection insert penetrates through the first base body, the second base body and the third base body and is abutted against the fourth base body, and the fixing piece is provided with a clamping part which is clamped and fixed in the third base body.

5. The mold assembly of claim 1, wherein: the second fixing seat is provided with an accommodating space for accommodating the operation assembly and a moving space communicated with the accommodating space and the accommodating cavity, and the height of the accommodating space is larger than that of the moving space in a second direction perpendicular to the first direction.

6. The mold assembly of claim 5, wherein: the storage space and the moving space are intersected, a partition wall is arranged at the intersection of the storage space and the moving space, the moving block is provided with a moving part stored in the moving space and a fixed block stored in the storage space, and the fixed block is abutted against a first side of the partition wall.