CN114750362A - Penetrating type tail lamp cover inverted mold mechanism and lamp cover injection molding process - Google Patents
Penetrating type tail lamp cover inverted mold mechanism and lamp cover injection molding process Download PDFInfo
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- CN114750362A CN114750362A CN202111623330.2A CN202111623330A CN114750362A CN 114750362 A CN114750362 A CN 114750362A CN 202111623330 A CN202111623330 A CN 202111623330A CN 114750362 A CN114750362 A CN 114750362A
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- 238000001746 injection moulding Methods 0.000 title claims abstract description 175
- 230000007246 mechanism Effects 0.000 title claims abstract description 26
- 230000000149 penetrating effect Effects 0.000 title description 3
- 238000002347 injection Methods 0.000 claims abstract description 19
- 239000007924 injection Substances 0.000 claims abstract description 19
- 230000000670 limiting effect Effects 0.000 claims description 36
- 239000012778 molding material Substances 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 3
- 239000004033 plastic Substances 0.000 description 5
- 229920003023 plastic Polymers 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000012797 qualification Methods 0.000 description 3
- 230000006872 improvement Effects 0.000 description 2
- 239000002991 molded plastic Substances 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 229920003229 poly(methyl methacrylate) Polymers 0.000 description 2
- 239000004926 polymethyl methacrylate Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000010009 beating Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 210000003205 muscle Anatomy 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/26—Moulds
- B29C45/2602—Mould construction elements
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/0025—Preventing defects on the moulded article, e.g. weld lines, shrinkage marks
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/16—Making multilayered or multicoloured articles
- B29C45/1615—The materials being injected at different moulding stations
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/26—Moulds
- B29C45/2681—Moulds with rotatable mould parts
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/0025—Preventing defects on the moulded article, e.g. weld lines, shrinkage marks
- B29C2045/0027—Gate or gate mark locations
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/30—Vehicles, e.g. ships or aircraft, or body parts thereof
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/747—Lightning equipment
- B29L2031/7472—Lampshades
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
The invention relates to the technical field of lampshade injection molds, in particular to a through type tail lamp cover inverted mold mechanism, which comprises: the injection molding device comprises an upper die and a lower die, wherein a first injection molding cavity is arranged on the upper die; the lower die and the upper die are closed, a second injection molding cavity is arranged on the lower die, when the upper die and the lower die are closed, the positions of the first injection molding cavity and the second injection molding cavity are staggered, and after the lower die horizontally rotates 180 degrees along the center line point of the lower die in the horizontal plane, the positions of the second injection molding cavity and the first injection molding cavity correspond; the upper die is provided with an injection molding port, the area where the trace left on the product molded in the second injection molding cavity by the injection molding port is an area B, and the first injection molding cavity completely covers the area B after the lower die rotates 180 degrees. According to the invention, through the improved design of the mold, the injection molding of the transparent sheet can be completed, then the injection molding of the black sheet can be completed after the lower mold is horizontally rotated for 180 degrees, and the residual traces on the transparent sheet can be covered after the injection molding of the black sheet, so that the attractiveness of the transparent sheet is improved.
Description
Technical Field
The invention relates to the technical field of automobile lamp molds, in particular to a through type tail lamp cover inverted mold mechanism and a lamp cover injection molding process.
Background
At present, with the continuous improvement of the aesthetic sense of the public, the diversification of the appearance of the automobile leads to the continuous improvement of the requirements of the automobile lamp industry. Both the internal optical requirements and the external appearance modeling and structural requirements are increasing. In order to achieve the breakthrough of the shape and function of the car lamp, great innovation of a greater degree is often required to be performed on a mould. On the basis of ensuring the stability and the uniformity of the die, the appearance and the structure of the lamp are required to be met as much as possible.
In the process of the steam lamp cover, the double-color injection molding treatment is often required to be carried out on the lamp cover, wherein the lamp cover subjected to the double-color injection molding treatment comprises a transparent sheet and a black sheet (colored), the traditional through type tail lamp cover is made of PMMA (polymethyl methacrylate) materials, and due to the double-color covering form, one or more sprue residual traces with the diameters of 2mm-2.5mm can be formed on the surface of a plastic product by directly connecting the transparent sheet with hot runner point gates according to the number of hot runner point positions. And most of run-through tail lamp both ends afterbody blackness piece welding muscle position has the direction back-off of demolding because of the influence of automobile body panel beating, need the mould to carry out interior taking out mechanism and can effectively injection moulding, interior taking out mechanism will certainly form interior taking out trace line and influence the outward appearance pleasing to the eye on plastic products.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the invention provides a through type tail lamp cover inverted mold mechanism, which aims to solve the technical problem that the appearance of a transparent sheet is influenced because a transparent sheet needs a hot runner point sprue gate direct contact on the surface of a plastic product due to a double-color covering form in the prior art.
The technical scheme adopted by the invention for solving the technical problems is as follows: a through type tail lamp cover flip-chip die mechanism comprises:
the injection molding device comprises an upper mold, a lower mold and a mold base, wherein a first injection molding cavity is arranged on the upper mold, and the first injection molding cavity is arranged on one side surface of the upper mold;
the lower die is covered with the upper die, the first injection molding cavity is positioned on the side surface of the upper die close to the lower die, a second injection molding cavity is arranged on the lower die, the second injection molding cavity is arranged on the side surface of the lower die close to the upper die, when the upper die is covered with the lower die, the positions of the first injection molding cavity and the second injection molding cavity are staggered, and after the lower die horizontally rotates 180 degrees along the center line point of the lower die in the horizontal plane, the positions of the second injection molding cavity and the first injection molding cavity correspond;
the upper mold is provided with an injection molding opening, the injection molding opening is communicated with the second injection molding cavity, an area where a mark left by the injection molding opening on a product molded in the second injection molding cavity is located is an area B, and after the lower mold horizontally rotates 180 degrees along a center line point of the lower mold in a horizontal plane, the area B is completely covered by the first injection molding cavity on the upper mold.
According to the through type tail lamp cover inverted mold mechanism, through improved design of a mold, injection molding of a transparent sheet can be completed, after the injection molding of the transparent sheet is completed, an upper mold and a lower mold are separated, the injection molding of a black sheet is performed after the lower mold is horizontally rotated by 180 degrees, and after the injection molding of the black sheet is completed, the black sheet can cover an area B where a trace left by an injection port on the transparent sheet is located, so that the trace of the injection port cannot be left on the transparent sheet, the attractiveness of the transparent sheet is improved, and the appearance structure of a lamp cover is beautified.
The clamping structure is arranged on the lower die, and when the lower die rotates, the clamping structure clamps and limits the injection-molded product on the lower die, so that the injection-molded product is left on the lower die.
Further, the clamping structure includes:
the movable piece is arranged on the lower die, fixedly connected with the lower die and used for fixing a product molded in the second injection molding cavity on the lower die;
the fixed piece is detachably and fixedly connected with the lower die, and the movable piece is fixed on the lower die by the fixed piece;
the limiting part is arranged on the lower die and fixedly connected with the lower die, and the limiting part limits the position of the moving part.
Further, the movable part comprises a sliding block, the sliding block is arranged on one side of the second injection molding cavity, a pressing sheet is arranged on the sliding block, the pressing sheet is fixedly connected with the sliding block or integrally formed with the sliding block, and the pressing sheet is abutted to the upper surface of a product which is subjected to injection molding in the second injection molding cavity so as to fix the product in the second injection molding cavity.
Further, a step surface is arranged on the lower die, and the side face, close to the second injection molding cavity, of the sliding block is attached to the step surface so that the sliding block can be limited horizontally through the step surface.
Further, the mounting is fixed guide post, fixed guide post slope sets up, fixed guide post runs through the slider after the grafting advance in the bed die, fixed guide post with fixed connection can be dismantled to the bed die.
Furthermore, the locating part is a limiting block, the limiting block is located on one side, far away from the second injection molding cavity, of the sliding block, one part of the limiting block is inserted into the lower die, the other part of the limiting block protrudes out of the surface of the lower die, and the limiting block and the lower die are detachably and fixedly connected.
Further, the contact area of the pressing sheet and a product injection-molded in the second injection cavity is an area A, and after the lower mold horizontally rotates 180 degrees along the center line point of the lower mold in the horizontal plane, the first injection cavity on the upper mold completely covers the area A.
Further, a heat flow channel is arranged on the upper die, the heat flow channel is communicated with the injection molding opening, and the heat flow channel extends to the outer surface of the upper die.
The invention also provides a lamp shade injection molding process, and the through type tail lamp shade flip-chip mold mechanism comprises the following steps:
s1, closing the upper mold and the lower mold, and injecting the transparent sheet injection molding material into the second injection molding cavity from the injection molding opening for injection molding of the transparent sheet;
s2, after the injection molding of the transparent sheet is finished, the movable part fixes the transparent sheet in the lower die to prevent the transparent sheet from being tightly held with the upper die, then the upper die and the lower die are separated, and the injection molded transparent sheet is left in the lower die;
s3, sliding the moving part out of the transparent sheet to prevent the moving part from contacting and extruding with the transparent sheet, horizontally rotating the lower die by 180 degrees along the center line point of the lower die in the horizontal plane, and closing the upper die and the lower die to enable the first injection molding cavity and the second injection molding cavity to be corresponding in position;
s4, injecting black sheet injection molding materials into the first injection molding cavity, wherein the black sheet injection molding materials are used for injection molding of black sheets in the first injection molding cavity, and injection molding port marks and moving part marks on the transparent sheet are covered by the injection molding black sheets so as to improve the attractiveness of the lampshade.
The through type tail lamp cover inverted mold mechanism and the lamp cover injection molding process have the advantages that through the improved design of the mold, the transparent sheet can be injected firstly, after the transparent sheet is injected, the upper mold and the lower mold are separated, the lower mold is horizontally rotated by 180 degrees and then the black sheet is injected, and after the black sheet is injected, the black sheet covers the area B where the trace left by the injection port on the transparent sheet is located, so that the trace of the injection port cannot be left on the transparent sheet, the attractiveness of the transparent sheet is improved, and the appearance structure of the lamp cover is beautified.
Set up the clamping structure on the bed die in addition, after moulding plastics the transparency, stay the transparency on the bed die through the clamping structure, when avoiding moulding plastics 180 along its self central line point horizontal rotation in the horizontal plane, the transparency is held tightly with last mould to be convenient for part last mould and bed die, the rotation of the bed die of being convenient for, and then avoid the transparency to hold tightly with last mould and damage, thereby improve the quality and the qualification rate that the lamp shade finished product was moulded plastics.
Drawings
The invention is further illustrated by the following examples in conjunction with the drawings.
Fig. 1 is a schematic structural view of a lower mold in the embodiment of the present invention.
Fig. 2 is a schematic structural diagram of an upper mold in an embodiment of the present invention.
Fig. 3 is a schematic view of the clamping structure and the transparent sheet in the embodiment of the invention.
Fig. 4 is an enlarged view at a in fig. 3.
Fig. 5 is an enlarged view at B in fig. 3.
Fig. 6 is a schematic cross-sectional view of a flip-chip mold mechanism for a through tail lamp cover in an embodiment of the invention.
Fig. 7 is a schematic view of a state that the clamping structure presses the transparent sheet in the embodiment of the present invention.
FIG. 8 is a schematic view showing a state in which black matrix injection is performed in the example of the present invention.
FIG. 9 is a schematic diagram illustrating the relationship between the width a of the region B and the width D of the black patch in the embodiment of the present invention.
FIG. 10 is a schematic diagram illustrating the relationship between the width b of the region A and the width D of the black patch in the embodiment of the present invention.
In the figure: 1. an upper die; 11. a first injection molding cavity; 12. an injection molding port; 13. a heat flow channel; 2. a lower die; 21. a second injection molding cavity; 4. a clamping structure; 4-1, a movable part; 4-2, fixing parts; 4-3, a limiting piece; 4-11, a sliding block; 4-12, tabletting; 4-13, step surface; 5. a transparent sheet; 6. black pieces.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the invention. Furthermore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified. In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
As shown in fig. 1 to 10, which are the preferred embodiments of the present invention, a flip-chip mold mechanism for a penetrating tail lamp cover comprises: the device comprises an upper die 1, a lower die 2 and a clamping structure 4, wherein a first injection molding cavity 11 is arranged on the upper die 1, and the first injection molding cavity 11 is arranged on one side surface of the upper die 1; the lower die 2 and the upper die 1 are closed, the first injection molding cavity 11 is located on the side face, close to the lower die 2, of the upper die 1, the second injection molding cavity 21 is arranged on the lower die 2, the second injection molding cavity 21 is arranged on the side face, close to the upper die 1, of the lower die 2, when injection molding of the transparent sheet 5 is carried out in the first stage, the positions of the first injection molding cavity 11 and the second injection molding cavity 21 are staggered when the upper die 1 and the lower die 2 are closed, when injection molding of the black sheet 6 is carried out in the second stage, after the lower die 2 rotates horizontally for 180 degrees along the center line point of the lower die 2 in the horizontal plane, the second injection molding cavity 21 corresponds to the position of the first injection molding cavity 11.
The upper die 1 is provided with an injection port 12, the injection port 12 is communicated with the second injection molding cavity 21, the upper die 1 is provided with a heat flow channel 13, the heat flow channel 13 is communicated with the injection port 12, and the heat flow channel 13 extends to the outer surface of the upper die 1. The area where the trace left on the product molded in the second injection molding cavity 21 by the injection molding port 12 is located is an area B, after the lower mold 2 horizontally rotates 180 degrees along the center line point of the lower mold in the horizontal plane, the first injection molding cavity 11 on the upper mold 1 completely covers the area B, referring to fig. 9, the width value of the area B is a, the width of the black sheet 6 injection molded by the first injection molding cavity 11 is D, and the value of D is greater than that of a, so that the area B can be covered by the first injection molding cavity 11, and the trace left on the transparent sheet 5 by the injection molding port 12 can be covered by the black sheet 6 after injection molding. Referring to fig. 5, after the transparent sheet 5 and the black sheet 6 are injection molded to form the lamp housing, the black sheet 6 covers the peripheral portion of the upper surface of the transparent sheet 5.
According to the through type tail lamp cover inverted mold mechanism, through the improved design of a mold, materials for injection molding of the transparent sheet 5 can be injected into the second injection molding cavity 21, the injection molding of the transparent sheet 5 is completed firstly, after the injection molding of the transparent sheet 5 is completed, the upper mold 1 and the lower mold 2 are separated, the lower mold 2 is horizontally rotated by 180 degrees and then injection molding of the black sheet 6 is performed, the materials for injection molding of the black sheet 6 are injected into the first injection molding cavity 11, after the injection molding of the black sheet 6 is completed, the black sheet 6 can cover the area B where the trace left by the injection molding opening 12 on the transparent sheet 5 is located, so that the trace of the injection molding opening 12 cannot be left on the transparent sheet 5, the attractiveness of the transparent sheet 5 is improved, and the appearance structure of a lamp cover is beautified.
Clamping structure 4 sets up on lower mould 2, and when lower mould 2 rotated, clamping structure 4 carried out the clamping spacing to injection moulding's product on lower mould 2 to make injection moulding's product stay on lower mould 2. Clamping structure 4 includes: the movable piece 4-1, the fixed piece 4-2 and the limiting piece 4-3 are arranged on the lower die 2, the movable piece 4-1 is fixedly connected with the lower die 2, and the movable piece 4-1 fixes a product formed in the second injection molding cavity 21 on the lower die 2; the fixed piece 4-2 is detachably and fixedly connected with the lower die 2, and the movable piece 4-1 is fixed on the lower die 2 by the fixed piece 4-2; the limiting piece 4-3 is arranged on the lower die 2, the limiting piece 4-3 is fixedly connected with the lower die 2, and the limiting piece 4-3 limits the position of the movable piece 4-1.
After the injection molding of the transparent sheet 5 is completed, the movable piece 4-1 slides to the upper surface of the transparent sheet 5, the movable piece 4-1 is abutted to a part of the upper surface of the transparent sheet 5, and the transparent sheet 5 is tightly pressed on the lower die 2 through the movable piece 4-1, so that the lower die 2 horizontally rotates 180 degrees along the central line point of the lower die 2 in the horizontal plane, the transparent sheet 5 can be left on the lower die 2 and cannot be tightly held by the upper die 1, therefore, the transparent sheet 5 cannot be taken out of the upper die 1 when the lower die 2 rotates, the integrity of the finished transparent sheet 5 can be ensured, and the injection molding quality and the qualification rate of a finished lampshade product are improved.
Specifically, the movable part 4-1 comprises a sliding block 4-11, the sliding block 4-11 is arranged on one side of the second injection molding cavity 21, a pressing sheet 4-12 is arranged on the sliding block 4-11, the pressing sheet 4-12 is fixedly connected with or integrally formed with the sliding block 4-11, the pressing sheet 4-12 is abutted against the upper surface of a product injected and molded in the second injection molding cavity 21 so as to fix the product in the second injection molding cavity 21, the product injected and molded in the second injection molding cavity 21 is the transparent sheet 5, and the pressing sheet 4-12 is attached to the upper surface of the transparent sheet 5 so as to press and fix the transparent sheet 5 on the lower mold 2.
The lower die 2 is provided with step surfaces 4-13, and the side surfaces of the sliding blocks 4-11 close to the second injection molding cavity 21 are attached to the step surfaces 4-13 so as to limit the sliding blocks 4-11 horizontally through the step surfaces 4-13. When the sliding block 4-11 slides along the horizontal direction, in the process that the sliding block 4-11 slides close to the transparent sheet 5 in the horizontal direction, the side surface of the sliding block 4-11 close to the second injection molding cavity 21 can be attached to the step surface 4-13 on the lower mold 2, at this time, the sliding block 4-11 can not slide close to the second injection molding cavity 21 any more, and at this time, the pressing sheet 4-12 just abuts against the upper surface of the transparent sheet 5 to press the transparent sheet 5 on the lower mold 2.
The fixing piece 4-2 is a fixed guide post which is obliquely arranged and is obliquely arranged towards one side close to the step surface 4-13, the fixed guide post penetrates through the sliding block 4-11 and then is inserted into the lower die 2, and the fixed guide post is detachably and fixedly connected with the lower die 2. The sliders 4-11 can be positioned through the arrangement of the fixed guide posts, the fixed guide posts are arranged in an inclined mode, the fixed guide posts penetrate through the fixed blocks and then are fixedly connected with the lower die 2 in a threaded mode, the inclined guide posts have acting forces in the horizontal direction and the vertical direction on the sliders 4-11, and therefore the sliders 4-11 have limiting effects in the horizontal direction and the vertical direction, the sliders 4-11 can only move in the inclined direction of the fixed guide posts, the step surfaces 4-13 have limiting effects in the horizontal direction on the sliders 4-11, the sliders 4-11 cannot slide in the inclined direction of the guide posts, and the sliders 4-11 are fixed on the lower die 2.
The limiting part 4-3 is a limiting block, the limiting block is positioned on one side of the sliding block 4-11 far away from the second injection molding cavity 21, one part of the limiting block is inserted into the lower mold 2, the other part of the limiting block protrudes out of the surface of the lower mold 2, and the limiting block and the lower mold 2 are detachably and fixedly connected. After the lower die 2 rotates 180 degrees, before the injection molding of the black sheet 6 is carried out, the sliding block 4-11 needs to firstly slide away from the second injection molding cavity 21 so that the pressing sheet 4-12 is not contacted with the transparent sheet 5, when the sliding block 4-11 slides along the direction away from the second injection molding cavity 21 to release the fixation of the pressing sheet 4-12 on the transparent sheet 5, the sliding block 4-11 stops sliding after being abutted against the limiting block, so as to limit the limiting block, the upper die 1 is provided with a concave cavity for limiting the sliding block 4-11, after the lower die 2 rotates 180 degrees, a part of the sliding block 4-11 is inserted into the concave cavity, the inner side surface of the concave cavity is abutted against the sliding block 4-11 so as to prevent the sliding block 4-11 from being close to the second injection molding cavity 21 to slide, so as to keep the sliding block 4-12 from being contacted with the transparent sheet 5, so as to limit the sliding block 4-11 through the limiting block and the concave cavity, thereby facilitating the injection molding of the black sheet 6.
The contact area of the pressing sheets 4-12 and the product injected and molded in the second injection molding cavity 21 is an area A, and after the lower mold 2 horizontally rotates 180 degrees along the center line point of the lower mold in the horizontal plane, the first injection molding cavity 11 on the upper mold 1 completely covers the area A. The area A is covered by the first injection molding cavity 11, after the black sheet 6 is injected, the black sheet 6 can cover the pressing sheets 4-12 with the pressing marks left on the transparent sheet 5, and therefore the attractiveness of the transparent sheet 5 is improved.
The invention also provides a lamp shade injection molding process, which adopts the through type tail lamp shade flip-chip type mold mechanism and comprises the following steps:
s1, closing the upper die 1 and the lower die 2, and injecting the transparent sheet 5 injection molding material from the injection port 12 into the second injection molding cavity 21 for injection molding of the transparent sheet 5;
s2, after the injection molding of the transparent sheet 5 is finished, the movable part 4-1 fixes the transparent sheet 5 in the lower die 2 to prevent the transparent sheet 5 from being tightly held with the upper die 1, then the upper die 1 is separated from the lower die 2, and the injection molded transparent sheet 5 is left in the lower die 2;
s3, sliding the moving part 4-1 out of the transparent sheet 5 to prevent the moving part 4-1 from contacting and extruding with the transparent sheet 5, horizontally rotating the lower die 2 by 180 degrees along the center line point of the lower die in the horizontal plane, and closing the upper die 1 and the lower die 2 to enable the first injection molding cavity 11 and the second injection molding cavity 21 to be corresponding in position;
s4, injecting black sheet 6 injection molding materials into the first injection molding cavity 11 to mold black sheets 6, and covering injection molding port 12 marks and moving part 4-1 marks on the transparent sheet 5 by the injection molding black sheets 6 to improve the attractiveness of the lampshade.
The through type tail lamp cover inverted mold mechanism and the lamp cover injection molding process have the advantages that through the improved design of the mold, the transparent sheet 5 can be injected firstly, after the injection molding of the transparent sheet 5 is completed, the upper mold 1 and the lower mold 2 are separated, the lower mold 2 is horizontally rotated by 180 degrees and then the injection molding of the black sheet 6 is performed, after the injection molding of the black sheet 6 is completed, the black sheet 6 can cover the area B where the trace left by the injection port 12 on the transparent sheet 5 is located, so that the trace of the injection port 12 cannot be left on the transparent sheet 5, the attractiveness of the transparent sheet 5 is improved, and the appearance structure of the lamp cover is beautified.
Set up clamping structure 4 in addition on lower mould 2, after accomplishing the injection moulding of transparency 5, stay transparency 5 on lower mould 2 through clamping structure 4, avoid with the mould along the 180 time of its self central line point horizontal rotation in the horizontal plane, transparency 5 and last mould 1 are held tightly, thereby be convenient for part upper mould 1 and lower mould 2, the rotation of lower mould 2 of being convenient for, and then avoid transparency 5 and last mould 1 to hold tightly the damage, thereby improve the quality and the qualification rate that the lamp shade finished product was moulded plastics.
In light of the foregoing description of the preferred embodiment of the present invention, many modifications and variations will be apparent to those skilled in the art without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined by the scope of the claims.
Claims (10)
1. The utility model provides a run through formula tail lamp cover flip-chip mould mechanism which characterized in that: the method comprises the following steps:
the injection molding device comprises an upper mold (1), wherein a first injection molding cavity (11) is formed in the upper mold (1), and the first injection molding cavity (11) is formed in one side surface of the upper mold (1);
the lower die (2) is covered with the upper die (1), the first injection molding cavity (11) is located on the side face, close to the lower die (2), of the upper die (1), the lower die (2) is provided with a second injection molding cavity (21), the second injection molding cavity (21) is arranged on the side face, close to the upper die (1), of the lower die (2), when the upper die (1) is covered with the lower die (2), the positions of the first injection molding cavity (11) and the second injection molding cavity (21) are staggered, and after the lower die (2) horizontally rotates 180 degrees along the center line point of the lower die in the horizontal plane, the position of the second injection molding cavity (21) corresponds to that of the first injection molding cavity (11);
the injection molding device is characterized in that an injection molding port (12) is formed in the upper mold (1), the injection molding port (12) is communicated with the second injection molding cavity (21), a region where a mark left on a product molded in the second injection molding cavity (21) by the injection molding port (12) is located is a region B, and after the lower mold (2) horizontally rotates 180 degrees along a center line point of the lower mold in the horizontal plane, the region B is completely covered by the first injection molding cavity (11) in the upper mold (1).
2. The flip-chip mold mechanism for a pass-through taillight cover as set forth in claim 1, wherein: still include clamping structure (4), clamping structure (4) set up on lower mould (2), when lower mould (2) rotated, clamping structure (4) carry out the clamping to injection moulding's product on lower mould (2) spacing to make injection moulding's product stay on lower mould (2).
3. The flip-chip mold mechanism for a pass-through taillight cover as set forth in claim 2, wherein: the clamping structure (4) comprises:
the movable piece (4-1), the movable piece (4-1) is arranged on the lower die (2), the movable piece (4-1) is fixedly connected with the lower die (2), and the movable piece (4-1) fixes a product formed in the second injection molding cavity (21) on the lower die (2);
the fixed piece (4-2) is detachably and fixedly connected with the lower die (2), and the movable piece (4-1) is fixed on the lower die (2) by the fixed piece (4-2);
the limiting piece (4-3), the limiting piece (4-3) sets up on bed die (2), limiting piece (4-3) with bed die (2) fixed connection, limiting piece (4-3) are to the position of moving part (4-1) restriction.
4. The flip-chip mold mechanism for a pass-through taillight cover as set forth in claim 3, wherein: the movable piece (4-1) comprises a sliding block (4-11), the sliding block (4-11) is arranged on one side of the second injection molding cavity (21), a pressing piece (4-12) is arranged on the sliding block (4-11), the pressing piece (4-12) is fixedly connected with the sliding block (4-11) or integrally formed, and the pressing piece (4-12) is abutted to the upper surface of a product injected and molded in the second injection molding cavity (21) so as to fix the product in the second injection molding cavity (21).
5. The flip-chip mold mechanism for a rear pass-through light cover as claimed in claim 4, wherein: the lower die (2) is provided with step surfaces (4-13), and the side surfaces, close to the second injection molding cavity (21), of the sliding blocks (4-11) are attached to the step surfaces (4-13) so as to limit the sliding blocks (4-11) horizontally through the step surfaces (4-13).
6. The flip-chip mold mechanism for a rear pass-through light cover as claimed in claim 5, wherein: the fixing piece (4-2) is a fixed guide post which is obliquely arranged, the fixed guide post penetrates through the sliding block (4-11) and then is inserted into the lower die (2), and the fixed guide post is detachably and fixedly connected with the lower die (2).
7. The flip-chip mold mechanism for a pass-through tail light cover of claim 4, wherein: the limiting part (4-3) is a limiting block, the limiting block is located on one side, away from the second injection molding cavity (21), of the sliding block (4-11), one part of the limiting block is inserted into the lower mold (2), the other part of the limiting block protrudes out of the surface of the lower mold (2), and the limiting block and the lower mold (2) are detachably and fixedly connected.
8. The flip-chip mold mechanism for a rear pass-through light cover as claimed in claim 4, wherein: the contact area of the pressing sheets (4-12) and the product injection-molded in the second injection molding cavity (21) is an area A, and after the lower mold (2) horizontally rotates 180 degrees along the center line point of the lower mold in the horizontal plane, the first injection molding cavity (11) on the upper mold (1) completely covers the area A.
9. The flip-chip mold mechanism for a pass-through taillight cover as set forth in claim 1, wherein: the upper die (1) is provided with a heat flow channel (13), the heat flow channel (13) is communicated with the injection molding opening (12), and the heat flow channel (13) extends to the outer surface of the upper die (1).
10. A lampshade injection molding process is characterized in that: use of a through tail light cover flip-chip mold mechanism as claimed in any one of claims 1 to 9, comprising the steps of:
s1, the upper die (1) and the lower die (2) are matched, and the injection molding material of the transparent sheet (5) is injected into the second injection molding cavity (21) from the injection molding opening (12) for injection molding of the transparent sheet (5);
s2, after the injection molding of the transparent sheet (5) is finished, the movable part (4-1) fixes the transparent sheet (5) in the lower die (2) to prevent the transparent sheet (5) from being tightly held with the upper die (1), then the upper die (1) is separated from the lower die (2), and the injection molded transparent sheet (5) is left in the lower die (2);
s3, sliding the moving piece (4-1) out of the transparent sheet (5) to enable the moving piece (4-1) to be not in contact with and extruded with the transparent sheet (5), horizontally rotating the lower die (2) by 180 degrees along the center line point of the lower die in the horizontal plane, and then closing the upper die (1) and the lower die (2) to enable the first injection molding cavity (11) and the second injection molding cavity (21) to be corresponding in position;
s4, injecting a black sheet (6) injection molding material into the first injection molding cavity (11), injecting the black sheet (6) injection molding material into the first injection molding cavity (11) to mold the black sheet (6), and covering injection molding port (12) marks and moving part (4-1) marks on the transparent sheet (5) by the injection molding black sheet (6) so as to improve the attractiveness of the lampshade.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111623330.2A CN114750362A (en) | 2021-12-28 | 2021-12-28 | Penetrating type tail lamp cover inverted mold mechanism and lamp cover injection molding process |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111623330.2A CN114750362A (en) | 2021-12-28 | 2021-12-28 | Penetrating type tail lamp cover inverted mold mechanism and lamp cover injection molding process |
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| CN114750362A true CN114750362A (en) | 2022-07-15 |
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| CN202111623330.2A Pending CN114750362A (en) | 2021-12-28 | 2021-12-28 | Penetrating type tail lamp cover inverted mold mechanism and lamp cover injection molding process |
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| CN (1) | CN114750362A (en) |
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