CN107498753B - Processing method of tubular light guide injection mold insert and insert manufactured by adopting same - Google Patents
Processing method of tubular light guide injection mold insert and insert manufactured by adopting same Download PDFInfo
- Publication number
- CN107498753B CN107498753B CN201710824084.4A CN201710824084A CN107498753B CN 107498753 B CN107498753 B CN 107498753B CN 201710824084 A CN201710824084 A CN 201710824084A CN 107498753 B CN107498753 B CN 107498753B
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- Prior art keywords
- injection mold
- mold insert
- light guide
- tubular light
- processing
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Classifications
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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
- B29C33/00—Moulds or cores; Details thereof or accessories therefor
- B29C33/38—Moulds or cores; Details thereof or accessories therefor characterised by the material or the manufacturing process
- B29C33/3842—Manufacturing moulds, e.g. shaping the mould surface by machining
-
- 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
-
- 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
- B29L2011/00—Optical elements, e.g. lenses, prisms
-
- 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
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
The invention relates to a processing method of a tubular light guide injection mold insert and an insert manufactured by the method, wherein the method is to directly process a single injection mold insert which is suitable for the whole length of a tubular light guide tooth part, or process a plurality of injection mold insert units section by section and then assemble a set of injection mold insert which is suitable for the whole length of the light guide tooth part, the processing of the single injection mold insert or the injection mold insert unit is to firstly carry out rough and finish processing on a blank, the processing part comprises all surfaces of the insert or the insert unit except the lower surface, and then separate the insert or the insert unit by linear cutting. The tubular light guide injection mold insert is manufactured by the processing method, the main body of the tubular light guide injection mold insert is in a strip shape, a plurality of bosses are arranged on the front side surface of the main body at intervals along the extending direction of the main body, and screw holes penetrating through in the front-back direction are formed in each boss. The invention can meet the molding quality requirement of the light guide tooth structure, is easy to inlay and has low processing cost.
Description
Technical Field
The invention relates to a processing method of a tubular light guide injection mold insert and the insert manufactured by the method, and belongs to the technical field of processing of the tubular light guide injection mold insert of a car lamp.
Background
With the continuous updating of the lamp shape, the length of the lamp light guide also shows a trend of gradually lengthening, and the optical pattern structure becomes more complex, so that higher requirements are put on the processing and manufacturing of the die. The prior car light has the advantages that the whole light guide tooth structure can be basically finished by adopting one insert, the processing is simpler, however, along with the length of the light guide, the light guide modeling tends to be in a development trend of space distortion, the forming of the light guide tooth structure is difficult to be finished by adopting one insert, and the forming quality can be satisfactory everywhere, or the traditional insert manufacturing method is adopted, even if the insert with high quality is manufactured, the cost is quite high.
Disclosure of Invention
In order to overcome the defects, the invention provides a processing method of a tubular light guide injection mold insert and the insert manufactured by the method, which can meet the molding quality requirement of a light guide tooth structure, is easy to insert and has low processing cost.
The main technical scheme of the invention is as follows:
the processing method of the tubular light guide injection mold insert comprises the steps of directly processing a single injection mold insert which is suitable for the whole length of a light guide tooth part of a tubular light guide, or processing injection mold insert units which are suitable for each segment of the light guide tooth part of the tubular light guide after being divided into a plurality of segments segment by segment, and then assembling the processed injection mold insert units into a set of injection mold inserts, wherein the processing steps of the single injection mold insert or the injection mold insert units are as follows:
step (1), rough machining is carried out on a blank, wherein a rough machining part comprises all surfaces except the lower surface on the single injection mold insert or the injection mold insert unit, a transition fillet or chamfer between the lower surface and the adjacent side surface of the single injection mold insert or the injection mold insert unit, a cylindrical surface extending vertically downwards from the edge of the machining surface, closest to the lower surface, on the single injection mold insert or the injection mold insert unit, and a toothed structure corresponding to a light guide tooth is positioned on the top surface of the single injection mold insert or the injection mold insert unit;
step (2), carrying out heat treatment on the workpiece obtained after the processing in the step (1);
step (3), carrying out finish machining on the workpiece obtained after the machining in the step (2), wherein the machining part is the same as the machining part in the step (1);
and (4) performing linear cutting on the workpiece obtained after the processing in the step (3), wherein a linear cutting path is along the lower surface of the single injection mold insert or the injection mold insert unit, so that the workpiece is separated into an upper part and a lower part, and the upper part is the single injection mold insert or the injection mold insert unit.
The machining in the steps (1) and (3) may be a machine milling machining.
The clamping part during milling is arranged at the lower part of the corresponding workpiece and corresponds to the local part on the lower part separated in the step (4).
A tubular light guide injection mold insert is manufactured by adopting any one of the processing methods.
The main body of tubular light guide injection mold insert is rectangular shape, the leading flank of main body is equipped with a plurality of bosss along main body extending direction interval, every be equipped with the screw hole that runs through forward and backward on the boss.
The upper part of the main body structure is provided with a vertical thin-wall structure at the rear part, and the toothed structures are positioned on the top surface of the vertical thin-wall structure and are sequentially arranged along the extending direction of the main body.
The height of the vertical thin-wall structure is preferably less than or equal to 8mm, and the thickness of the vertical thin-wall structure in the front-back direction is preferably 1.6-2mm.
The lower edge of the vertical thin-wall structure is in inclined surface transition with the upper edge of the front side surface of the main body.
Directly processing a single injection mold insert which is suitable for the full length of the light guide tooth part of the tubular light guide when the full length of the light guide tooth part is not more than 400 mm; and when the total length of the light guide tooth part exceeds 400mm, processing the injection mold insert units which are matched with each section of the light guide tooth part of the tubular light guide after being divided into a plurality of sections section by section.
The length of a segment of the light guiding tooth portion corresponding to one of the injection mold insert units is between 200mm and 400 mm.
The beneficial effects of the invention are as follows:
the method can ensure higher processing precision of the external contour of the insert, and plays an important role in smooth equipment and product production. The novel car light guide tooth die insert is particularly suitable for long light guides with twisted shapes, can save materials, save machining time and shorten assembly time while improving machining quality, so that manufacturing cost is reduced, and the difficult problem that the novel car light guide tooth die insert is too large and difficult to machine and insert is well solved.
The method is simple and feasible, easy to implement and popularize and wide in applicability. The manufactured insert has simple structure and high precision.
Drawings
FIG. 1 is a schematic perspective view of a tubular light guide;
FIG. 2 is a graphical representation of the relative positional relationship of the tubular light guide and the corresponding injection mold insert unit;
FIG. 3 is a schematic view of the structure of the corresponding workpiece in steps (1) and (3);
FIG. 4 is a schematic view of a wire cut path;
FIG. 5 is a schematic structural view of the base;
fig. 6 is a partial structural enlarged view of the injection mold insert unit.
Detailed Description
The invention discloses a processing method of a tubular light guide injection mold insert, which is used for directly processing a single injection mold insert which is suitable for the whole length of a light guide tooth part of a tubular light guide 1 shown in figures 1 and 2 (as indicated by an arrow in figure 1), or processing injection mold insert units which are suitable for each section of the light guide tooth part of the tubular light guide after being divided into a plurality of sections. The latter case is shown in fig. 3-5: the light guide teeth of the tubular light guide shown in fig. 1 and 2 are divided into two sections, injection mold insert units 2 and 3 corresponding to the two sections of light guide teeth are processed section by section, and the processed injection mold insert units are assembled into a set of injection mold inserts. The processing method is the same whether it is a single injection mold insert or a single injection mold insert unit. The processing steps of the single injection mold insert and the injection mold insert unit are described below by taking the injection mold insert unit 2 as an example:
and (1) performing rough machining on the blank 4, wherein the rough machining part comprises all surfaces except the lower surface of the single injection mold insert or the injection mold insert unit, and comprises a transition fillet or chamfer between the lower surface and the adjacent side surface. To effect the machining of the transition fillet and chamfer, the machining surface also includes cylindrical surfaces 5-1 extending vertically downwardly from the edge of the machining surface on the single injection mold insert or injection mold insert unit closest to the lower surface, which cylindrical surfaces tend to be concave laterally inwardly relative to the lower side of the single injection mold insert or injection mold insert unit.
The tooth structure corresponding to the light guide tooth 1-1 is located on the top surface of the single injection mold insert or injection mold insert unit, which is also in the row of rough machining in step (1);
step (2), carrying out heat treatment on the workpiece obtained after the processing in the step (1); the surface hardness of the part is improved mainly by quenching.
Step (3), carrying out finish machining on the workpiece obtained after the machining in the step (2), wherein the machining part is the same as the machining part in the step (1);
and (4) performing linear cutting on the workpiece obtained after the processing in the step (3), wherein a linear cutting path is along the design position of the lower surface of the single injection mold insert or the injection mold insert unit, and for the embodiment, the linear cutting path is the position shown by a continuous curve where a plurality of arrows are located in fig. 4. And separating the workpiece into an upper part and a lower part, wherein the upper part is the single injection mold insert or the injection mold insert unit. The lower part may be referred to as the base 5.
A vertical gap d exists between the linear cutting surface and the large curved surface f of the base, and the distance is the height of the cylindrical surface 5-1, so that all other structures except the linear cutting position of the insert or the insert unit can be finished through milling processing of a machine tool (including a bottom rounded corner).
According to the conventional machining method, a part of the insert itself is clamped by a machine tool and another part thereof is reworked, which easily causes machining deviation. According to the processing method provided by the invention, when most of the outline of the insert or the insert unit is processed, the insert or the insert unit still keeps being connected with one part of the blank, namely, the base is still reserved during cutting processing, and the base is used as a clamping part, so that the influence of clamping deformation can be reduced, and the processing precision is improved. The wire cutting also ensures the precision of the outer contour of the insert or the insert unit, and plays a certain auxiliary role in smooth equipment and product production.
The machining in the steps (1) and (3) is preferably milling by a machine tool.
The clamping part during milling is arranged at the lower part of the corresponding workpiece and corresponds to the local part of the lower part separated in the step (4), namely the part which actually corresponds to the base.
Through the test die, the first injection molding product meets various quality requirements of products including light distribution requirements, meanwhile, the material cost is saved, the processing time is saved, and the assembly time is shortened.
As shown in fig. 3 and 6, the invention also discloses a tubular light guide injection mold insert which is manufactured by adopting the processing method.
The main body of the tubular light guide injection mold insert is in a strip shape, a plurality of bosses 2-2 are arranged on the front side surface 2-1 of the main body at intervals along the extending direction of the main body, and screw holes 2-3 penetrating in the front-back direction are arranged on each boss. When the insert or the insert unit is mounted on the die mounting base, the boss is positioned, and the insert or the insert unit is fastened by passing a screw through the screw hole. The upper and lower, left and right sides and the front of each boss are positioning surfaces. The screw hole is designed on the boss to play a role of 'screw+pin', so that the mounting requirement of the insert unit 2 on the die mounting base can be met.
The upper part of the main body structure is provided with vertical thin-wall structures 2-4 at the rear part, and the toothed structures are positioned on the top surface of the vertical thin-wall structures and are sequentially arranged along the extending direction of the main body.
The height h of the vertical thin-wall structure is less than or equal to 8mm, and the thickness t of the vertical thin-wall structure in the front-back direction is 1.6-2mm. With such a size matching, too short a lifetime of the insert or insert unit can be avoided.
The lower edge of the vertical thin-wall structure is in transition with the upper edge of the front side surface of the main body through the inclined surface 2-5.
Directly machining a single injection mold insert compatible with the full length of the light guide tooth portion of the tubular light guide when the full length of the light guide tooth portion is not more than 400 mm; and when the total length of the light guide tooth part exceeds 400mm, processing the injection mold insert units which are matched with each section of the light guide tooth part of the tubular light guide after being divided into a plurality of sections section by section. The length of the light guide tooth portion is in accordance with a curved length.
The length of a segment of the light guiding tooth portion corresponding to one of the injection mold insert units is between 200mm and 400 mm. In the embodiment shown in the drawings, when the total length of the light guide tooth part is between 400mm and 800mm, the light guide tooth part is preferably divided into two sections at the middle position, and injection mold insert units respectively corresponding to the two sections are processed section by section.
Claims (10)
1. A processing method of a tubular light guide injection mold insert is characterized by comprising the following steps: directly processing a single injection mold insert which is suitable for the whole length of the light guide tooth part of the tubular light guide, or firstly processing injection mold insert units which are suitable for each segment of the light guide tooth part of the tubular light guide after being divided into a plurality of segments segment by segment, and then assembling each processed injection mold insert unit into a set of injection mold inserts, wherein the processing steps of the single injection mold insert or the injection mold insert units are as follows:
step (1), rough machining is carried out on a blank, wherein a rough machining part comprises all surfaces except the lower surface on the single injection mold insert or the injection mold insert unit, a transition fillet or chamfer between the lower surface and the adjacent side surface of the single injection mold insert or the injection mold insert unit, a cylindrical surface extending vertically downwards from the edge of the machining surface, closest to the lower surface, on the single injection mold insert or the injection mold insert unit, and a toothed structure corresponding to a light guide tooth is positioned on the top surface of the single injection mold insert or the injection mold insert unit;
step (2), carrying out heat treatment on the workpiece obtained after the processing in the step (1);
step (3), carrying out finish machining on the workpiece obtained after the machining in the step (2), wherein the machining part is the same as the machining part in the step (1);
and (4) performing linear cutting on the workpiece obtained after the processing in the step (3), wherein a linear cutting path is along the lower surface of the single injection mold insert or the injection mold insert unit, so that the workpiece is separated into an upper part and a lower part, and the upper part is the single injection mold insert or the injection mold insert unit.
2. The method of processing a tubular light guide injection mold insert of claim 1, wherein: the machining in the steps (1) and (3) adopts machine tool milling.
3. The method of processing a tubular light guide injection mold insert of claim 2, wherein: the clamping part during milling is arranged at the lower part of the corresponding workpiece and corresponds to the local part on the lower part separated in the step (4).
4. A tubular light guide injection mold insert, characterized by: which is processed by the processing method as claimed in claim 1, 2 or 3.
5. The tubular light guide injection mold insert of claim 4, wherein: the main body is in a strip shape, a plurality of bosses are arranged on the front side surface of the main body at intervals along the extending direction of the main body, and screw holes penetrating through in the front-back direction are formed in each boss.
6. The tubular light guide injection mold insert of claim 5, wherein: the upper part of the main body structure is provided with a vertical thin-wall structure at the rear part, and the toothed structures are positioned on the top surface of the vertical thin-wall structure and are sequentially arranged along the extending direction of the main body.
7. The tubular light guide injection mold insert of claim 6, wherein: the height of the vertical thin-wall structure is less than or equal to 8mm, and the thickness of the vertical thin-wall structure in the front-back direction is 1.6-2mm.
8. The tubular light guide injection mold insert of claim 7, wherein: the lower edge of the vertical thin-wall structure is in inclined surface transition with the upper edge of the front side surface of the main body.
9. The tubular light guide injection mold insert of claim 4, 5, 6, 7 or 8, wherein: directly processing a single injection mold insert which is suitable for the full length of the light guide tooth part of the tubular light guide when the full length of the light guide tooth part is not more than 400 mm; and when the total length of the light guide tooth part exceeds 400mm, processing the injection mold insert units which are matched with each section of the light guide tooth part of the tubular light guide after being divided into a plurality of sections section by section.
10. The tubular light guide injection mold insert of claim 9, wherein: the length of a segment of the light guiding tooth portion corresponding to one of the injection mold insert units is between 200mm and 400 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710824084.4A CN107498753B (en) | 2017-09-13 | 2017-09-13 | Processing method of tubular light guide injection mold insert and insert manufactured by adopting same |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710824084.4A CN107498753B (en) | 2017-09-13 | 2017-09-13 | Processing method of tubular light guide injection mold insert and insert manufactured by adopting same |
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| CN107498753A CN107498753A (en) | 2017-12-22 |
| CN107498753B true CN107498753B (en) | 2023-08-04 |
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| CN111136425A (en) * | 2019-12-30 | 2020-05-12 | 宁波杰达模具机械有限公司 | Production process of special-shaped long insert of four-stroke engine shell mold |
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| CN105818325A (en) * | 2016-04-01 | 2016-08-03 | 上海小糸车灯有限公司 | Thick wall plastic part surrounding type layered injection molding method and mold structure and lens product thereof |
| CN106239835A (en) * | 2016-08-12 | 2016-12-21 | 东江模具（深圳）有限公司 | The bright finish mold insert of a kind of injection mold and manufacture method thereof |
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