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CN114311542A - Injection mold of headlight reflector - Google Patents

Injection mold of headlight reflector Download PDF

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Publication number
CN114311542A
CN114311542A CN202210129632.2A CN202210129632A CN114311542A CN 114311542 A CN114311542 A CN 114311542A CN 202210129632 A CN202210129632 A CN 202210129632A CN 114311542 A CN114311542 A CN 114311542A
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China
Prior art keywords
mold
cavity
lower cavity
molding
groove
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Granted
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CN202210129632.2A
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Chinese (zh)
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CN114311542B (en
Inventor
曾智
彭运才
彭运海
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Dongguan Baiyou Precision Mold Plastic Co ltd
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Dongguan Baiyou Precision Mold Plastic Co ltd
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Priority to CN202210129632.2A priority Critical patent/CN114311542B/en
Publication of CN114311542A publication Critical patent/CN114311542A/en
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Publication of CN114311542B publication Critical patent/CN114311542B/en
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Abstract

The invention discloses an injection mould of a headlight reflector, comprising a lower mould and an upper mould, wherein the upper surface of the lower mould is provided with a plurality of first moulds, each first mould is provided with an inwards concave lower cavity, the upper mould is embedded with a second mould corresponding to the first mould, the second mould is provided with an upper mould convex matched with the lower cavity, a plurality of inserts are embedded in the lower cavity, the inserts are matched with the corresponding lower cavity to form a parting mould surface matched with the outer surface of the headlight reflector, the periphery of each first mould corresponding to the lower cavity is provided with a plurality of first line grooves, the position of the second mould opposite to the first line grooves is provided with a second line groove, each first line groove and the corresponding second line groove are matched to form a mould groove, a drawing mould is arranged in the mould groove, the lower cavity, the upper mould convex and the drawing mould are embedded to form a first forming cavity for forming the headlight reflector, and the drawing mould is also used for forming side grooves on the headlight reflector, the insert is also ejected by the ejector rod after the headlamp reflector is formed by the injection mold so as to demold the headlamp reflector.

Description

Injection mold of headlight reflector
Technical Field
The invention relates to the technical field of molds, in particular to an injection mold of a headlamp reflector.
Background
An injection mold is a tool for producing plastic products and also a tool for giving the plastic products complete structure and precise dimensions. Various parts of the lamp assembly are often injection molded using an injection mold, such as: the lamp body, the reflector, the reflection cup, but in the injection moulding process of the headlight reflector of locomotive, because the product after the reflector needs to be shaped needs to carry out the reflection of light, consequently need make the reflector internal forming curved surface's that corresponds reflection portion, curved surface, arc isotructure, the shaping cavity bottom that inevitably makes corresponding injection mold is little than the top, simultaneously, in order to satisfy the installation demand, need form the slot, the riveting post etc. that are used for the installation on the casing of reflector, consequently cause among the correlation technique, the injection mold for injection moulding headlight reflector is difficult in the drawing of patterns after injection moulding, the bone position of the fashioned product easily forms back-off, riveting post and slot easily produce defects such as thin and rigid, the fashioned product quality is low.
At present, no effective solution is provided for the problem of poor quality of a formed headlamp reflector product formed by injection molding of an injection mold in the related art.
Disclosure of Invention
In view of the above, there is a need for an injection mold for a headlamp reflector, which at least solves the problem of poor quality of the molded headlamp reflector product injection molded by the injection mold in the related art.
In order to solve the above technical problems, the present invention provides a technical solution as follows: an injection mold of a headlamp reflector comprises a lower mold and an upper mold, wherein the lower mold is opposite to the upper mold, a first parting surface is arranged on the upper surface of the lower mold, a plurality of first molds are embedded on the first parting surface, each first mold is provided with a concave lower cavity, the lower cavity is a cavity which is inclined downwards from a ridge line at the middle part to two sides, a second parting surface is arranged on the lower surface of the upper mold, a second mold corresponding to the first molds is embedded on the second parting surface, an upper mold convex matched with the lower cavity is arranged at the position, right opposite to the second mold and the lower cavity, of the second mold, the upper mold convex is also matched with the inner surface of the headlamp reflector in shape, a plurality of inserts are embedded in the lower cavity, and are matched with the corresponding lower cavity to form a parting mold surface matched with the outer surface of the headlamp reflector, each first mold is provided with a plurality of first line grooves on the periphery corresponding to the lower cavity, the second mold is provided with second line grooves on the position opposite to the first line grooves, each first line groove and the corresponding second line groove are combined to form a mold cavity, a drawing die embedded into the peripheral side wall of the lower cavity is arranged in the mold cavity, the lower cavity, the upper mold bulge and the drawing die are embedded to form a first molding cavity body used for molding the headlamp reflector, the drawing die is also used for molding side grooves on the headlamp reflector, and the insert is ejected out by an ejector rod after the injection mold is used for molding the headlamp reflector so as to demold the headlamp reflector.
In the injection mold, the first slide groove and the second slide groove are combined to form a mold cavity for the drawing installation; the first molding cavity body of the molded headlamp reflector is formed by matching the drawing die, the plurality of inserts, the upper die projection and the lower die recess, the surface and the side wall of the molded headlamp reflector are reversely buckled, the edge sharp glue and the sharp steel are few, the product quality is high, and the problem of poor product quality of the injection molded headlamp reflector is solved; simultaneously, through setting up the drawing die, make to shape out the side groove, just drawing die, a plurality of the cooperation of inserting to can demould fast behind the shaping headlight reflector, solve the injection mold drawing of patterns difficulty problem of injection moulding headlight reflector.
In some embodiments, in order to realize the shaping car light wear groove, the type cave still includes relatively the perpendicular middle part type groove that sets up of ridge line down, middle part type groove both ends respectively with the week lateral wall of type cave down is connected, go up the mould protruding still be equipped with structurally with the middle part type groove matched's middle part type is protruding, wherein, the type cave down with when going up the mould protruding phase, the protruding embedding of middle part type is in middle part type groove to form the second shaping cavity in the first shaping cavity, the second shaping cavity is used for on the headlight reflector shaping car light wear groove.
In some embodiments, in order to mold an optical portion capable of reflecting light inside a molded product, the upper mold convex includes a first molding portion and a second molding portion that are arranged in a mirror image mode with a mountain line as a boundary, the first molding portion and the second molding portion are both orange-petal-shaped molding portions, the first molding portion and the second molding portion form a convex mold in a hyperbolic paraboloid shape, a plurality of convex ribs for molding reflecting edges on the inner surface of the headlamp reflector are arranged on the surfaces of the first molding portion and the second molding portion, and a concave edge matched with the convex ribs is arranged on the molding surface of the lower cavity.
In some embodiments, in order to form a corresponding first molding cavity and achieve rapid fitting in place and rapid demolding when an upper mold is matched with a lower mold, the drawing die is arranged in the first alignment groove, the drawing die comprises a body, a molding head die is arranged at one end of the body inserted into the peripheral side wall of the lower mold cavity, a first inclined wedge surface is arranged at one end of the body far away from the molding head die, a guide hole inclined downwards is further arranged on the body, a wedge block matched with the drawing die is further arranged in the second alignment groove, the wedge block comprises an installation part and an inclined wedge platform which are integrally molded, a first guide pillar inclined downwards is arranged on the installation part, the inclined wedge platform is provided with a second inclined wedge surface matched with the first inclined wedge surface, wherein the first guide pillar is used for penetrating into the guide hole when the upper mold is matched with the lower mold, and the first inclined wedge surface is matched with the top of the second inclined wedge surface, the drawing die is driven to drive the forming head die to be embedded into the peripheral side wall of the lower cavity.
According to the arrangement, the molding head die is embedded into the peripheral side wall of the lower cavity, so that the first molding cavity can be molded to form a side groove; in the process of closing or demolding the upper mold and the lower mold, the first guide pillar vertically moves to laterally push the drawing mold to move along the first line groove, so that the drawing mold is driven to be correspondingly embedded or separated with the lower cavity, and the mold and the corresponding insert are convenient to disassemble and assemble.
In some embodiments, in order to accelerate the separation of the drawing die from the lower cavity after the upper die and the lower die are demolded, a guide column extending toward the lower cavity is further disposed on one side of the drawing die close to the lower cavity, a first elastic member is sleeved on the guide column, two free ends of the first elastic member respectively abut against a side wall of the first die and a side wall of the drawing die opposite to the first die, and the first elastic member is configured to provide an elastic force in an axial direction of the guide column when the first die and the second die are separated from each other, so that the forming head die is separated from a peripheral side wall of the lower cavity.
According to the arrangement, the first elastic piece pushes the acting force provided by the first die to drive the drawing die to be far away from the first die, so that the drawing die and the first die are accelerated to be demolded, and the speed of ejecting and demolding the product is accelerated.
In some embodiments, in order to form a parting mold surface matched with an outer surface of a headlamp reflector, the plurality of inserts comprise a first insert arranged in the middle of the lower cavity and a plurality of second inserts arranged on the parting mold surface in an array, wherein the parting mold surface of the first insert comprises a first inclined curved surface and a second inclined curved surface, a boundary line of the first inclined curved surface and the second inclined curved surface is overlapped with the ridge line, each second insert comprises a parabolic curved surface, and the first insert, the second insert and the lower cavity are embedded, so that the first inclined curved surface, the second inclined curved surface, the parabolic curved surface and corresponding bottom end surfaces of the lower cavity are combined to form the parting mold surface.
In some embodiments, in order to form a rivet column on a headlamp reflector, a first cavity groove is further formed in the parting die surface, the first cavity groove is arranged in a central symmetry manner, a first ejector sleeve penetrating through the first die and the lower die is further arranged in the first cavity groove, the first cavity groove is used for forming a cavity for forming the rivet column when the upper die boss and the lower die cavity are combined, and the first ejector sleeve extends into the first cavity groove and is used for forming a lock hole on the rivet column.
In some embodiments, in order to form the locking and attaching clamp column on the side groove to firmly fix the headlight reflector, a second cavity groove is further provided at a position corresponding to each of the drawing dies on the peripheral side wall of the lower cavity, and a second ejector sleeve penetrating through the first die and the lower die is further provided in the second cavity groove, wherein the second cavity groove is used for forming a cavity for forming the locking and attaching clamp column at the bottom end of the side groove when the drawing die is embedded in the peripheral side wall of the lower cavity, and the second ejector sleeve extends into the second cavity groove and is used for forming a connecting hole on the locking and attaching clamp column.
In some embodiments, in order to achieve smooth glue injection and reduce air in a plastic material, two first symmetrically-arranged molds are embedded in the first parting surface, each first mold is further provided with a pouring runner connected with a pouring system of the injection mold, a first inclined notch is further formed at a connection position of the lower cavity and the pouring runner, a second inclined notch is formed at a position of the second mold corresponding to the first inclined notch, the first inclined notch and the second inclined notch are matched to form a glue injection port communicating the first molding cavity and the pouring runner, wherein the first inclined notch is a notch which gradually decreases in width and inclines downwards from the connection position of the first mold and the lower cavity to the connection position of the lower cavity and the pouring runner, and the inclined angle of the first inclined notch is a, and a is more than or equal to 15 degrees and less than or equal to 30 degrees; the second inclined notch is a notch which is gradually reduced in width and inclined downwards from the position where the upper die convex is connected to the pouring runner, the inclined angle of the second inclined notch is b, and b is more than or equal to 15 degrees and less than or equal to 30 degrees.
So set up, through setting the injecting glue mouth to be close to first molding cavity body end flat and wide, the plastic raw materials pours into first molding cavity body smoothly, and simultaneously, the injecting glue mouth is from first molding cavity body orientation pouring runner direction downward sloping, and the plastic raw materials that make keeps filling up the pouring runner all the time, and the air that has in the pouring runner is few, reduces the bubble that injection moulding's product produced.
In some embodiments, in order to assemble a complete mold structure, the injection mold further includes a top mold plate, two square irons, a top needle plate, a bottom needle plate, and a base, two square irons are disposed on the base at an interval, the two square irons are disposed on two sides of the base in a transverse direction, the lower mold is fixedly disposed on the two square irons, the lower mold is further connected to the base through a second guide pillar, a second elastic member is sleeved on the second guide pillar, the bottom needle plate and the top needle plate are disposed between the two square irons and penetrate the second guide pillar, the ejector rod, the first cylinder and the second cylinder are connected to the bottom mold plate after penetrating through the first mold, the lower mold and the top needle plate, the lower mold is further movably connected to the upper mold through a third guide pillar and a guide sleeve, the top mold plate is fixedly disposed on the upper mold, the bottom pin plate and the ejector pin plate can be pushed by an external ejector pin to move, so that the ejector pin, the first ejector cylinder and the second ejector cylinder move, and the molded headlamp reflector is ejected and stripped; the second elastic piece is used for pushing the ejector plate to drive the ejector rod, the first ejector sleeve and the second ejector sleeve to move relatively far away from the lower die after ejection and stripping are completed, and the corresponding insert, the first ejector sleeve and the second ejector sleeve return.
Drawings
FIG. 1 is an exploded view of an upper mold and a lower mold of an injection mold according to an embodiment of the present disclosure;
FIG. 2 is an exploded view of a lower die, a first die, an insert, and a drawing die according to an embodiment of the present application;
FIG. 3 is a schematic view of a portion of an injection mold according to an embodiment of the present application;
FIG. 4 is a perspective view of an injection mold of an embodiment of the present application;
FIG. 5 is a schematic view of an injection molded headlamp reflector of the present application;
fig. 6 is another schematic view of an injection molded headlamp reflector of the present application.
Reference numerals:
001. a headlamp reflector; 002. a side groove; 003. the car lamp is provided with a groove in a penetrating way; 004. reflecting edges; 005. riveting columns; 006. a lock hole; 007. locking the clamping column; 008. connecting holes;
1. a lower die; 101. a first parting surface; 102. pouring a runner;
2. an upper die; 201. a second parting plane;
3. a first mold; 301. a lower type hole; 302. a first line slot; 303. a middle section groove; 304. a recessed edge; 305. a first cavity; 306. a second cavity; 307. a first beveled slot opening;
4. a second mold; 401. the upper die is convex; 402. a second line slot; 403. the middle part is convex; 404. a first molding section; 405. a second molding section; 406. a rib; 407. a second beveled slot opening;
5. an insert; 51. a first insert; 52. a second insert; 511. a first inclined curved surface; 512. a second person's oblique curved surface; 521. a parabolic curved surface;
6. drawing a die; 61. a body; 62. forming a head die; 63. a first sloped wedge surface; 64. a guide hole;
7. a top rod;
8. a wedge block; 81. an installation part; 82. an inclined wedge table; 83. a second sloped wedge surface;
9. a first guide post;
10. a first elastic member;
11. a first ejector sleeve;
12. a first ejector sleeve;
13. a top template;
14. square iron;
15. an ejector plate;
16. a bottom needle plate;
17. a base;
18. a second elastic member;
19. a third guide post;
20. and (4) guiding a sleeve.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It will be understood that when an element is referred to as being "mounted on" another element, it can be directly mounted on the other element or intervening elements may also be present. When a component is referred to as being "disposed on" another component, it can be directly on the other component or intervening components may also be present. When an element is referred to as being "secured to" another element, it can be directly secured to the other element or intervening elements may also be present.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "or/and" includes any and all combinations of one or more of the associated listed items.
Fig. 1 is an exploded view of an upper mold and a lower mold of an injection mold for molding a headlight reflector 001 shown in fig. 5 and 6 according to an embodiment of the present invention.
Referring to fig. 1 to 6, an injection mold for a headlight reflector according to an embodiment of the present invention includes a lower mold 1 and an upper mold 2 disposed opposite to the lower mold 1, wherein a first parting surface 101 is disposed on an upper surface of the lower mold 1, a plurality of first molds 3 are embedded on the first parting surface 101, each first mold 3 is provided with a concave lower cavity 301, the lower cavity 301 is a cavity extending downward from a ridge line 302 in a middle portion, a second parting surface 201 is disposed on a lower surface of the upper mold 2, a second mold 4 corresponding to the first mold 3 is embedded on the second parting surface 201, an upper mold projection 401 matching the lower cavity 301 is disposed at a position where the second mold 4 faces the lower cavity 301, the upper mold projection 401 further matches an inner surface of the headlight reflector 001 in shape, a plurality of insert blocks 5 are embedded in the lower cavity 301, the plurality of insert blocks 5 are combined with the corresponding lower cavity 301 to form a parting mold surface matching an outer surface of the headlight reflector 001, each first mold 3 is provided with a plurality of first line grooves 302 corresponding to the peripheral side of the lower cavity 301, the second mold 4 is provided with a second line groove 402 at the position opposite to the first line groove 302, each first line groove 302 and the corresponding second line groove 402 are combined to form a mold groove, a drawing die 6 embedded into the peripheral side wall of the lower cavity 301 is arranged in the mold groove, wherein the lower cavity 301, the upper mold protrusion 401 and the drawing die 6 are embedded to form a first molding cavity body for molding the headlamp reflector 001, the drawing die 6 is also used for molding a side groove 002 on the headlamp reflector 001, and the insert 5 is also ejected by a mandril 7 after the headlamp reflector 001 is molded by an injection mold so as to demold the headlamp reflector 001.
In the injection mold, a first slide groove 302 and a second slide groove 402 are matched to form a mold cavity for installing the drawing mold 6; the drawing die 6, the plurality of inserts 5, the upper die projection 401 and the lower die recess 301 are arranged to be matched to form a first forming cavity body of the molded headlamp reflector 001, the surface and the side wall of the molded headlamp reflector 001 are reversely buckled, the edge point glue and the point steel are few, the product quality is high, and the problem that the quality of the injection molded headlamp reflector 001 is poor is solved; simultaneously, through setting up drawing die 6, the messenger can shape out side slot 002, and drawing die 6, the cooperation of a plurality of inserts 5 to can the fast demoulding behind making shaping headlight reflector 001, solved the injection mold drawing of patterns difficulty problem of injection moulding headlight reflector 001.
Fig. 2 is an exploded schematic view of a lower die, a first mold, an insert and a drawing die according to an embodiment of the present disclosure, referring to fig. 1 and fig. 2, in order to form a vehicle lamp through groove 003, in some embodiments, the lower cavity 301 further includes a middle groove 303 vertically disposed relative to a ridge line, two ends of the middle groove 303 are respectively connected to peripheral sidewalls of the lower cavity 301, the upper protrusion 401 is further provided with a middle protrusion 403 structurally matched with the middle groove 303, when the lower cavity 301 and the upper protrusion 401 are matched, the middle protrusion 403 is embedded into the middle groove 303, and a second forming cavity is formed in the first forming cavity, and the second forming cavity is used for forming the vehicle lamp through groove 003 on the headlight reflector 001.
In order to mold an optical portion capable of reflecting light inside a molded product, referring to fig. 1 to 2, in some embodiments, the upper mold projection 401 includes a first molding portion 404 and a second molding portion 405 which are arranged in a mirror image with a waistline as a boundary, each of the first molding portion 404 and the second molding portion 405 is a molded portion in a shape of a tangerine lobe, the first molding portion 404 and the second molding portion 405 form a convex mold in a shape of a hyperbolic paraboloid, a plurality of convex ribs 406 for molding a reflecting rib 004 on an inner surface of a headlamp reflector 001 are arranged on the surface of each of the first molding portion 404 and the second molding portion 405, and a concave edge 304 matched with the convex ribs 406 is arranged on a mold parting surface of the lower cavity 301.
In order to realize the formation of the corresponding first molding cavity and the fast fitting and fast demolding when the upper mold 2 and the lower mold 1 are combined, referring to fig. 1 to 2, in some embodiments, the drawing die 6 is disposed in the first alignment groove 302, the drawing die 6 comprises a body 61, a molding head die 62 is disposed at one end of the body 61 inserted into the peripheral wall of the lower mold cavity 301, a first inclined wedge surface 63 is disposed at one end of the body 61 away from the molding head die 62, a downwardly inclined guide hole 64 is further disposed on the body 61, a wedge block 8 matched with the drawing die 6 is further disposed in the second alignment groove 402, the wedge block 8 comprises an integrally formed mounting portion 81 and an inclined wedge platform 82, a downwardly inclined first guide pillar 9 is disposed on the mounting portion 81, the inclined wedge platform 82 has a second inclined wedge surface 83 matched with the first inclined wedge surface 63, wherein the first guide pillar 9 is used for penetrating into the guide hole 64 and matching the first inclined wedge surface 63 and the second inclined wedge surface 83 to abut against when the upper mold 2 and the lower mold 1 are combined, the forming head die 62 is driven by the driving drawing die 6 to be embedded into the peripheral side wall of the lower cavity 301.
With this arrangement, the side groove 002 can be formed in the first molding cavity by inserting the molding head die 62 into the peripheral sidewall of the lower cavity 301; in the process of closing or demolding the upper mold 2 and the lower mold 1, the first guide pillar 9 vertically moves to laterally push the drawing mold 6 to move along the first line groove 302, so that the drawing mold 6 is driven to be correspondingly embedded or separated from the lower mold cavity 301, and the mold and the corresponding insert are convenient to disassemble and assemble.
It should be noted that, during the process of closing or releasing the upper mold 2 and the lower mold 1, the first guide post 9 moves vertically along with the upper mold 2, meanwhile, since the first guide post 9 is disposed obliquely, during the vertical movement, an oblique thrust force is generated to press and abut against the drawing die 6, since the drawing die 6 is installed on the lower mold 1, the component force of the oblique thrust force generated by the first guide post 9 in the vertical direction is offset by the lower mold 1, and the component force corresponding to the direction toward the first mold 2 acts on the drawing die 6 to move the drawing die 6 toward or away from the lower cavity 301, so as to drive the drawing die 6 to be correspondingly embedded or separated from the lower cavity 301.
In order to accelerate the separation of the drawing die 6 from the lower cavity 301 after the upper die 2 and the lower die 1 are demolded, referring to fig. 1 and 2, a guiding column (not shown in the drawing) extending towards the lower cavity 301 is further disposed on one side of the drawing die 6 close to the lower cavity 301, a first elastic member 10 is sleeved on the guiding column, two free ends of the first elastic member 10 respectively abut against a side wall of the first die 3 and a side wall of the drawing die 6 opposite to the first die 3, wherein the first elastic member 10 is configured to provide elastic force along an axial direction of the guiding column when the first die 3 and the second die 4 are separated from each other, so that the forming head die 62 is separated from a peripheral side wall of the lower cavity 301.
So set up, through the effort that first elastic component 10 supported and pushed first section mould 3 and provided, realize that drive drawing die 6 keeps away from relative first section mould 3 to realize accelerating drawing die 6 and the drawing die 3's of first section mould drawing of patterns, and accelerate the ejecting speed of drawing die of product.
It should be noted that, when the upper die 2 and the lower die 1 are combined, the first elastic member 10 is in a force accumulation compressed state and provides elastic force to buffer the movement of the drawing die 6 towards the lower cavity 301, and when the upper die 2 and the lower die 3 are demolded, the upper die 2 releases the pushing force generated by pressing, at this time, the first elastic member 10 is converted from the compressed state to the telescopic state and releases the force accumulated in the compressed state, and since the lower die 1 is fixed, when the first elastic member 10 is converted from the compressed state to the telescopic state, the released elastic force acts on the drawing die 6, only the drawing die 6 is pushed laterally, so that the side drawing die 6 is driven to be far away from the lower cavity 301.
It is understood that in other embodiments, the first elastic member 10 satisfying the requirement of providing elastic force to make the first elastic member 10 push the drawing die 6 to move is suitable for the first elastic member 10 of this embodiment. For example, springs and compression springs may be selected.
In some embodiments, in order to form a parting mold surface matching with the outer surface of the headlight reflector 001, the plurality of inserts 5 includes a first insert 51 disposed in the middle of the lower cavity 301 and a plurality of second inserts 52 disposed in the parting mold surface in an array, wherein the parting mold surface of the first insert 51 includes a first inclined curved surface 511 and a second inclined curved surface 512, a boundary line between the first inclined curved surface 511 and the second inclined curved surface 512 overlaps with a ridge line, each of the second inserts 52 includes a parabolic curved surface 521, and the first insert 51, the second insert 52 and the lower cavity 301 are fitted so that bottom end surfaces corresponding to the first inclined curved surface 511, the second inclined curved surface 512, the parabolic curved surface 521 and the lower cavity 301 are combined to form the parting mold surface.
In order to mold the rivet pin 005 on the headlight reflector 001, referring to fig. 2, in some embodiments, a first cavity 305 is further provided on the parting mold surface, the first cavity 305 is further provided with a first ejector 11 penetrating through the first mold 3 and the lower mold 1, wherein the first cavity 305 is used for forming a cavity for molding the rivet pin 005 when the upper mold projection 401 and the lower mold cavity 301 are combined, and the first ejector 11 extends into the first cavity 305 for molding the lock hole 006 on the rivet pin 005.
The first cavity 305 forms a cavity for molding the rivet shaft 005, and the first barrel 11 is inserted into the cavity, so that the lock hole 006 for riveting the connector is molded in the rivet shaft 005.
Fig. 3 is a partial schematic view of an injection mold according to an embodiment of the present application, in order to form a locking clip column 007 on a side groove 002, so as to firmly mount and fix a headlight reflector 001, referring to fig. 1 to 3, in some embodiments, a second cavity groove 306 is further provided at a position where a peripheral side wall of a lower cavity 301 corresponds to each drawing die 6, a second sleeve 12 penetrating through a first die 3 and a lower die 1 is further provided in the second cavity groove 306, wherein the second cavity groove 306 is used for forming a cavity for forming the locking clip column 007 at a bottom end of the side groove 2 when the drawing die 6 is embedded in the peripheral side wall of the lower cavity 301, and the second sleeve 12 extends into the second cavity groove 306 for forming a connecting hole 008 on the locking clip column 007.
It should be noted that the second cavity 306 forms a cavity for forming a part of the locking clip column 007, and the second barrel 12 is inserted into the cavity, so that the connecting hole 008 for the locking connecting member is formed on the locking clip column 007.
In order to realize smooth glue injection and reduce air in plastic raw materials, referring to fig. 1 to 3, in some embodiments, two first molds 3 symmetrically arranged are embedded on a first parting surface 101, each first mold 3 is further provided with a pouring runner 102 connected with a pouring system of an injection mold, a first inclined notch 307 is further provided at a connection position of a lower cavity 301 and the pouring runner 102, a second inclined notch 407 is provided at a position of a second mold 4 corresponding to the first inclined notch 307, the first inclined notch 307 and the second inclined notch 407 are matched to form a glue injection port communicating a first molding cavity and the pouring runner 102, wherein the first inclined notch 307 is a notch which gradually decreases in width and inclines downwards from the connection position with the lower cavity 301 to the connection position with the pouring runner 102, and the inclined angle of the first inclined notch 307 is a, and a is more than or equal to 15 degrees and less than or equal to 30 degrees; the second inclined notch 407 is a notch which gradually decreases in width and inclines downwards from the joint of the second inclined notch 407 and the upper die projection 401 to the joint of the second inclined notch 407 and the pouring runner 102, and the inclination angle of the second inclined notch 407 is b, and b is more than or equal to 15 degrees and less than or equal to 30 degrees.
So set up, through setting the injecting glue mouth to be close to first molding cavity body end flat and wide, the plastic raw materials pours into first molding cavity body smoothly into, and simultaneously, the injecting glue mouth is from first molding cavity body towards pouring runner direction downward sloping, and the plastic raw materials that make keeps filling up the pouring runner all the time, and the air that has in the pouring runner is few, reduces the bubble that injection moulding's product produced.
Fig. 4 is a perspective view of an injection mold of the present application, and referring to fig. 1 to 5, in order to assemble a complete mold structure, in some embodiments, in order to assemble a complete mold structure, the injection mold further includes a top mold plate 13, square irons 14, an ejector plate 15, a bottom needle plate 16 and a base 17, two square irons 14 arranged at intervals are installed on the base 17, the two square irons 14 are arranged at two sides of the base 17 in a transverse direction, the lower mold 1 is fixed on the two square irons 14, the lower mold 1 is further connected with the base 17 through second guide pillars (not shown in the drawing), second elastic members 18 are sleeved on the second guide pillars, the bottom needle plate 16 and the ejector plate 19 are arranged between the two square irons 14 and penetrate through the second guide pillars, the ejector rod 7, the first ejector sleeve 11 and the second ejector sleeve 12 are connected with the bottom needle plate 16 after penetrating through the first mold 3, the lower mold 1 and the ejector plate 15, the lower mold 1 is further movably connected with the upper mold 2 through third guide pillars 19, the top template 13 is fixedly arranged on the upper die 2, wherein the bottom needle plate 16 and the ejector plate 19 can be pushed by an external ejector rod to move, so that the ejector rod 7, the first ejector cylinder 11 and the second ejector cylinder 12 move, and the formed headlamp reflector 001 is ejected and stripped; and the second elastic part 18 is used for pushing the ejector plate 15 to drive the ejector rod 7, the first ejector sleeve 11 and the second ejector sleeve 12 to move relatively far away from the lower die 1 after the ejection and stripping are finished, so that the corresponding insert 5, the first ejector sleeve 11 and the second ejector sleeve 12 return.
When the injection mold is used for stripping materials, the second elastic part 18 is in a force accumulation compression state and provides elastic force to buffer the vertical upward movement of the ejector plate 19, and after the injection mold finishes stripping materials, the external ejector rod releases the pushing acting force, at the moment, the second elastic part 18 is converted into a telescopic state from the compression state and releases the force stored in the compression state, and the lower mold 1 is fixed, so that when the second elastic part 18 is converted into the telescopic state from the compression state, the released elastic force can only act on the ejector plate 19, and the ejector plate 19 is driven to move downwards to complete the return of the insert 5, the first sleeve 11 and the second sleeve 12.
It is understood that in other embodiments, the second elastic member 18 satisfying the requirement of providing an elastic force to make the second elastic member 18 push the ejector plate 19 to move is suitable for the second elastic member 18 of the present embodiment. For example, springs and compression springs may be selected.
In order to realize the fast embedding in place when the first section mould 3 is matched with the second section mould 4, in one embodiment, four top corners of each first section mould 3 are provided with first mortises; four top corners of the second type die 4 are respectively provided with a first tenon which is matched with the first tenon groove; wherein, the first tenon is embedded with the first mortise to make the first section mould 3 and the second section mould 4 embedded and matched.
The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
It should be understood by those skilled in the art that the above embodiments are only for illustrating the present invention and are not to be used as a limitation of the present invention, and that suitable changes and modifications of the above embodiments are within the scope of the claimed invention as long as they are within the spirit and scope of the present invention.

Claims (10)

1. An injection mold of a headlamp reflector comprises a lower mold and an upper mold, wherein the lower mold is arranged opposite to the upper mold, a first parting surface is arranged on the upper surface of the lower mold, a plurality of first molds are embedded on the first parting surface, each first mold is provided with a concave lower cavity, the lower cavity is a cavity which extends downwards from a ridge line in the middle to two sides in an inclined manner, a second parting surface is arranged on the lower surface of the upper mold, a second mold corresponding to the first molds is embedded on the second parting surface, an upper mold bulge matched with the lower cavity is arranged at the position, right opposite to the lower cavity, of the second mold, the upper mold bulge is also matched with the inner surface of the headlamp reflector in shape, and the injection mold is characterized in that a plurality of inserts are embedded in the lower cavity and matched with the corresponding lower cavity to form a parting mold surface matched with the outer surface of the headlamp reflector, each first mold is provided with a plurality of first line grooves on the periphery corresponding to the lower cavity, the second mold is provided with second line grooves on the position opposite to the first line grooves, each first line groove and the corresponding second line groove are combined to form a mold cavity, a drawing die embedded into the peripheral side wall of the lower cavity is arranged in the mold cavity, the lower cavity, the upper mold bulge and the drawing die are embedded to form a first molding cavity body used for molding the headlamp reflector, the drawing die is also used for molding side grooves on the headlamp reflector, and the insert is ejected out by an ejector rod after the injection mold is used for molding the headlamp reflector so as to demold the headlamp reflector.
2. The injection mold for a headlamp reflector as defined in claim 1, wherein the lower cavity further comprises a middle groove disposed perpendicular to the ridge line, two ends of the middle groove are connected to the peripheral side walls of the lower cavity, and the upper protrusion is further provided with a middle protrusion structurally matching with the middle groove, wherein when the lower cavity and the upper protrusion are combined, the middle protrusion is inserted into the middle groove and forms a second molding cavity in the first molding cavity, and the second molding cavity is used for molding a through-groove for a headlamp on the headlamp reflector.
3. The injection mold of the headlight reflector as claimed in claim 2, wherein the upper molding protrusion comprises a first molding portion and a second molding portion which are arranged in a mirror image manner with a mountain line as a boundary, the first molding portion and the second molding portion are both orange-petal-shaped molding portions, the first molding portion and the second molding portion form a male mold in a hyperbolic paraboloid shape, a plurality of convex ribs for molding reflecting edges on the inner surface of the headlight reflector are arranged on the surfaces of the first molding portion and the second molding portion, and a concave edge matched with the convex ribs is arranged on the parting mold surface of the lower cavity.
4. The injection mold for a headlamp reflector as defined in claim 1, wherein the drawing die is disposed in the first displacement groove, the drawing die comprises a body, a forming head die is arranged at one end of the body inserted into the peripheral side wall of the lower cavity, one end of the body, which is far away from the forming head die, is provided with a first inclined wedge surface, the body is also provided with a guide hole which inclines downwards, a wedge block matched with the drawing die is also arranged in the second slide groove and comprises an installation part and an inclined wedge platform which are integrally formed, the mounting part is provided with a first guide post which inclines downwards, the inclined wedge table is provided with a second inclined wedge surface which is matched with the first inclined wedge surface, the first guide post is used for penetrating into the guide hole when the upper die and the lower die are combined, and the first inclined wedge surface and the second inclined wedge surface are matched to abut against each other so as to drive the drawing die to drive the forming head die to be embedded into the peripheral side wall of the lower cavity.
5. The injection mold for a headlamp reflector as defined in claim 4, wherein a guide post extending toward the lower cavity is further disposed on a side of the drawing die close to the lower cavity, the guide post is sleeved with a first elastic member, two free ends of the first elastic member respectively abut against a side wall of the first mold and a side wall of the drawing die opposite to the first mold, and wherein the first elastic member is configured to provide an elastic force along an axial direction of the guide post when the first mold and the second mold are separated from each other, so that the forming head mold is separated from a peripheral side wall of the lower cavity.
6. The injection mold for a headlamp reflector as defined in claim 1, wherein the plurality of inserts includes a first insert disposed in a central portion of the lower cavity and a plurality of second inserts arrayed on the parting mold surface, wherein the parting mold surface of the first insert includes a first inclined curved surface and a second inclined curved surface, a boundary line between the first inclined curved surface and the second inclined curved surface overlaps the ridge line, and each of the second inserts includes a parabolic curved surface, and the first insert, the second insert and the lower cavity are fitted together such that corresponding bottom end surfaces of the first inclined curved surface, the second inclined curved surface, the parabolic curved surface and the lower cavity are joined to form the parting mold surface.
7. The injection mold of the headlight reflector of any one of claims 1 to 6, wherein the parting mold surface is further provided with first cavities symmetrically arranged in the center, and a first ejector sleeve penetrating through the first mold and the lower mold is further arranged in the first cavities, wherein the first cavities are used for forming cavities for forming rivet columns when the upper mold bulges and the lower mold cavities are combined, and the first ejector sleeve extends into the first cavities and is used for forming lock holes on the rivet columns.
8. The injection mold for a headlamp reflector according to claim 7, wherein a second cavity groove is further formed in a position of the peripheral side wall of the lower cavity corresponding to each of the drawing dies, and a second ejector sleeve penetrating through the first mold and the lower mold is further disposed in the second cavity groove, wherein the second cavity groove is used for forming a cavity for forming a locking and attaching clamp column at the bottom end of the side groove when the drawing die is embedded in the peripheral side wall of the lower cavity, and the second ejector sleeve extends into the second cavity groove and is used for forming a connecting hole in the locking and attaching clamp column.
9. The injection mold of the headlight reflector as claimed in claim 8, wherein two first molds are symmetrically arranged on the first parting surface, each first mold is further provided with a casting runner connected with a casting system of the injection mold, a first inclined notch is further provided at a connection position of the lower cavity and the casting runner, a second inclined notch is provided at a position of the second mold corresponding to the first inclined notch, the first inclined notch and the second inclined notch are matched to form a glue injection port communicating the first molding cavity and the casting runner, wherein the first inclined notch is a notch which gradually decreases in width and inclines downwards from the connection position of the second mold and the lower cavity to the connection position of the first molding cavity and the casting runner, and the inclined angle of the first inclined notch is a, and a is more than or equal to 15 degrees and less than or equal to 30 degrees; the second inclined notch is a notch which is gradually reduced in width and inclined downwards from the position where the upper die convex is connected to the pouring runner, the inclined angle of the second inclined notch is b, and b is more than or equal to 15 degrees and less than or equal to 30 degrees.
10. The injection mold of a headlamp reflector as defined in claim 9, further comprising a top mold plate, two square irons, a top needle plate, a bottom needle plate and a base, wherein the base is provided with the two square irons spaced apart from each other, the two square irons are disposed on two sides of the base in a transverse direction, the lower mold is fixedly disposed on the two square irons, the lower mold is further connected to the base through a second guide post, the second guide post is sleeved with a second elastic member, the bottom needle plate and the top needle plate are disposed between the two square irons and penetrate the second guide post, the top rod, the first driver cylinder and the second driver cylinder are connected to the bottom needle plate after penetrating through the first mold, the lower mold and the top needle plate, the lower mold is further movably connected to the upper mold through a third guide post and a guide sleeve, and the top mold plate is fixedly disposed on the upper mold, the bottom pin plate and the ejector pin plate can be pushed by an external ejector pin to move, so that the ejector pin, the first ejector cylinder and the second ejector cylinder move, and the molded headlamp reflector is ejected and stripped; the second elastic piece is used for pushing the ejector plate to drive the ejector rod, the first ejector sleeve and the second ejector sleeve to move relatively far away from the lower die after ejection and stripping are completed, and the corresponding insert, the first ejector sleeve and the second ejector sleeve return.
CN202210129632.2A 2022-02-11 2022-02-11 Injection mold of headlight reflector Active CN114311542B (en)

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JP2009149005A (en) * 2007-12-21 2009-07-09 Meiki Co Ltd Mold for molding of light guide plate, and molding process of light guide plate
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