CN217916515U - Improved structure of injection mold for composite plastic corner connecting card of automobile sealing strip - Google Patents
Improved structure of injection mold for composite plastic corner connecting card of automobile sealing strip Download PDFInfo
- Publication number
- CN217916515U CN217916515U CN202221412532.2U CN202221412532U CN217916515U CN 217916515 U CN217916515 U CN 217916515U CN 202221412532 U CN202221412532 U CN 202221412532U CN 217916515 U CN217916515 U CN 217916515U
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- CN
- China
- Prior art keywords
- insert
- sealing strip
- mold
- corner connecting
- injection
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- 239000004033 plastic Substances 0.000 title claims abstract description 47
- 229920003023 plastic Polymers 0.000 title claims abstract description 47
- 238000007789 sealing Methods 0.000 title claims abstract description 30
- 238000002347 injection Methods 0.000 title claims abstract description 26
- 239000007924 injection Substances 0.000 title claims abstract description 26
- 239000002131 composite material Substances 0.000 title claims abstract description 7
- 238000005266 casting Methods 0.000 claims abstract description 27
- 238000000034 method Methods 0.000 claims description 4
- 230000007547 defect Effects 0.000 abstract description 7
- 238000005253 cladding Methods 0.000 abstract description 2
- 238000013329 compounding Methods 0.000 abstract 1
- 239000000463 material Substances 0.000 description 14
- 239000003292 glue Substances 0.000 description 8
- 238000004513 sizing Methods 0.000 description 4
- 239000004831 Hot glue Substances 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- 239000012943 hotmelt Substances 0.000 description 3
- 239000011248 coating agent Substances 0.000 description 2
- 238000001746 injection moulding Methods 0.000 description 2
- 206010006322 Breath holding Diseases 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000004073 vulcanization Methods 0.000 description 1
Images
Landscapes
- Injection Moulding Of Plastics Or The Like (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
The utility model discloses a car sealing strip composite plastic connects angle card injection mold to improve structure belongs to rubber injection mold. Aims to provide a corner connecting injection mould which can carry out rubber cladding on a plastic corner connecting card without installing a supporting nail. The mold comprises an upper mold, a lower mold fixed on a mold base and an insert arranged on the lower mold; a casting nozzle (8) and an injection nozzle (10) which are protruded upwards are fixed on the surface of the insert (6), and the casting nozzle (8) is communicated with the injection nozzle (10) through a runner (11) which is arranged in the insert (6) and is in a hook-shaped structure; four positioning pins (9) which are distributed on the surface of the insert (6) and have a convex structure are arranged around the casting nozzle (8). The utility model can effectively improve the appearance quality of the product joint angle, and solve the defects of nail leakage, convex closure and the like of the appearance of the automobile sealing strip joint angle; is a rubber injection mould for compounding plastic cards at the joint angle of the automobile sealing strip.
Description
Technical Field
The utility model relates to a rubber mold especially relates to an injection mold for connecting car sealing strip meets angle.
Background
The rubber joint angle of the first sealing strip of the automobile sealing strip is mainly processed by adopting a rubber injection process. In order to prevent the sealing strip corner joint from deforming during loading and to achieve an attractive appearance, a plastic corner joint card coated with rubber inside the corner joint of the sealing strip is usually adopted to replace an external plastic corner joint card.
In the process of coating the plastic corner connecting card by using an injection mold, the plastic corner connecting card positioned at the corner connecting part of the sealing strip can block the flow of hot-melt rubber in a mold cavity of the mold, so that the pressure of a flow channel at the front end of rubber material is weakened to cause difficult filling of the mold cavity, and the rubber shortage is easy to occur; therefore, two sizing material flow channels are usually designed and processed on the front and back of the plastic corner card. However, the simultaneous glue feeding from the front and the back can form defects such as junction marks, bubbles and the like on the plastic corner connecting card.
In order to eliminate the defects caused by simultaneous glue feeding from the front and the back, the glue material flow channel is generally arranged below the back (non-appearance surface) of the plastic corner connecting card at present, and the glue feeding mode adopting the lower flow channel has the advantage of facilitating the arrangement of a plastic corner connecting card positioning element. However, since the appearance surface is arranged above the plastic corner connecting card, a fixing structure cannot be arranged in the die cavity above the plastic corner connecting card, and when the die cavity is filled with hot-melt adhesive, the hot-melt adhesive can be fed from the die cavity below the plastic corner connecting card, so that the plastic corner connecting card is easy to deform and tilt, and the plastic corner connecting card leaks outside.
In order to eliminate the defects of tilting, leakage and the like of the plastic corner connecting card, the conventional solution is to arrange a plurality of conical supporting nails on the surface of the plastic corner connecting card. However, the top of the supporting nail cone leaks or the defects that a bulge is formed around the supporting nail after the rubber material shrinks exist. In addition, the support nail is easy to move under the impact action of the rubber material to prop against the die cavity, and the die cavity can be damaged after long-term use.
Disclosure of Invention
In order to solve the problem, the utility model aims at providing a car sealing strip composite plastic connects angle card injection mold to improve structure utilizes this improvement mould not to need the installation support nail can realize carrying out the rubber cladding to plastics connect angle card.
In order to achieve the above purpose, the utility model adopts the following technical scheme: the mold comprises an upper mold, a lower mold fixed on a mold base and an insert arranged on the lower mold; the surface of the insert is fixed with a casting nozzle and an injection nozzle which are protruded upwards, and the casting nozzle and the injection nozzle are communicated through a flow passage which is arranged in the insert and is of a hook-shaped structure; four positioning pins which are distributed on the surface of the insert and have a structure like a Chinese character 'tu' are arranged around the casting nozzle.
The casting nozzle in the technical scheme is formed by a half casting nozzle respectively positioned on the left insert and the right insert; the joint surface of the left insert and the right insert and the joint surface of the other half-casting nozzle are coplanar with the central plane of the flow passage.
In the technical scheme, the two sides of the die holder are both fixed with the sealing strip support frames.
Compared with the prior art, the utility model discloses owing to adopted above-mentioned technical scheme, consequently have following advantage:
1) The surface of the insert is provided with a casting nozzle and positioning pins with a convex structure, mounting holes matched with the casting nozzle are added at positions corresponding to the casting nozzle on the plastic corner connecting card, positioning holes matched with the four positioning pins are added at positions corresponding to the four positioning pins, and meanwhile, a plurality of material passing holes are added at proper positions of the plastic corner connecting card, so that a sizing material heated by a mold can be injected and filled into a mold cavity above the plastic corner connecting card through the casting nozzle through a flow channel positioned inside the insert, and after the mold cavity above the plastic corner connecting card is filled with the sizing material, the hot-melt sizing material flows into the mold cavity below the plastic corner connecting card through the plurality of material passing holes, so that the front and back surfaces of the plastic corner connecting card can be perfectly coated without supporting pins. Effectively promote product angle appearance quality, solved defects such as nail, convex closure are leaked in car sealing strip angle appearance.
2) Because the supporting nail is not needed to be arranged in the glue injection process, the upper cavity of the die is not pressed to cause damage, and the service life of the die is effectively prolonged.
3) Because the single-channel glue feeding is adopted, the defects of contact marks, breath holding and the like easily generated by double-channel glue feeding are thoroughly overcome, and the processing and manufacturing difficulty of the die is reduced.
Drawings
Fig. 1 is a schematic perspective view of the present invention;
FIG. 2 is a schematic view of the three-dimensional structure of the lower mold with the cover plate of the lower mold removed;
FIG. 3 is a schematic perspective view of the insert with the sealing strip and the plastic corner connecting card mounted thereon;
FIG. 4 is an enlarged fragmentary view of FIG. 3 with the seal strip and plastic corner card removed;
fig. 5 is a schematic structural diagram of a plastic corner connecting card.
In the figure: the device comprises an upper die 1, a lower die 2, a sealing strip 3, a sealing strip support frame 4, a die holder 5, an insert 6, a right insert 6-1, a left insert 6-2, a plastic corner connecting card 7, a material passing hole 7-1, a mounting hole 7-2, a positioning hole 7-3, a casting nozzle 8, a semi-casting nozzle 8-1, a positioning pin 9, an injection nozzle 10 and a runner 11.
Detailed Description
For the sake of understanding, it is necessary to briefly describe the structure of the workpiece before further explanation of the invention is given in connection with the accompanying drawings and the specific embodiments.
As shown in fig. 1, 3, and 5: the workpiece (the automobile sealing strip with plastic corner connecting cards at the corners) is composed of a sealing strip 3 bent into an L-shaped structure and plastic corner connecting cards 7 embedded at the corners of the sealing strip. The plastic corner clip 7 is of a substantially rectangular sheet-like configuration, with the side thereof connected to the sealing strip 3 being recessed inwardly to form an arcuate configuration. The four corners of the plastic corner connecting card 7 are respectively provided with a positioning hole 7-3, the center of the plastic corner connecting card 7 is provided with a mounting hole 7-2, and a plurality of material through holes 7-1 are distributed around the mounting hole.
The structure of the utility model is shown in figures 1-4: the utility model discloses constitute by last mould 1 and the lower mould 2 of fixing on die holder 5. An insert 6 is arranged on the surface of the lower die, and a casting nozzle 8 which protrudes upwards and is matched with the mounting hole 7-2 and an injection nozzle 10 which protrudes upwards are fixed on the surface of the insert; the insert 6 is internally provided with a flow passage 11 which is of a hook-shaped structure and is used for communicating the casting nozzle 8 with the injection nozzle 10. Four positioning pins 9 which are fixed on the surface of the insert 6 and are in a convex structure and matched with the corresponding positioning holes 7-3 are arranged around the casting nozzle 8.
For the convenience of machining and for cleaning when the runner is blocked, the insert 6 is composed of a left insert 6-2 and a right insert 6-1, and the nozzle 8 is composed of a half nozzle 8-1 on the left insert 6-2 and another half nozzle 8-1 (not shown) on the right insert 6-1. The combined surface of the left insert 6-2 and the right insert 6-1 and the combined surfaces of the two semi-casting nozzles 8-1 are coplanar with the central plane of the runner 11.
Because the sealing strip 3 is longer, in order to avoid the two ends of the sealing strip from falling, the two sides of the die holder 5 are both fixed with sealing strip supporting frames 4.
When the injection molding machine is used, the connecting angle of a workpiece is arranged in a cavity of the lower die 2, the four positioning pins 9 are respectively inserted into the corresponding positioning holes 7-3, the casting nozzle 8 penetrates out of the mounting hole 7-2 and is higher than the upper surface of the plastic connecting angle clamping piece 7, two ends of the sealing strip 3 are respectively arranged on the sealing strip supporting frame 4, and then the injection molding machine is closed. The hot melt adhesive enters and fills the die cavity above the plastic corner connecting card 7 through the runner 11 and the casting nozzle 8, and then is injected and filled into the die cavity below the plastic corner connecting card 7 through the plurality of through holes 7-1.
In the injection coating process, the mold cavity above the plastic corner connecting card 7 is filled with the rubber material and vulcanized, so that when hot-melt rubber is injected into the mold cavity below the plastic corner connecting card 7, the plastic corner connecting card 7 cannot be jacked up by the rubber material and leaks out of the surface of the mold cavity, and perfect coating can be carried out on the front side and the back side of the plastic corner connecting card without arranging a support nail.
And after the glue injection and the vulcanization are finished, automatically opening the mold of the injection machine, and taking out the product from the mold cavity.
Claims (3)
1. An improved structure of an injection mold for a composite plastic corner connecting card of an automobile sealing strip comprises an upper mold, a lower mold fixed on a mold base and an insert installed on the lower mold; the method is characterized in that: a casting nozzle (8) and an injection nozzle (10) which are protruded upwards are fixed on the surface of the insert (6), and the casting nozzle (8) is communicated with the injection nozzle (10) through a runner (11) which is arranged in the insert (6) and is in a hook-shaped structure; four positioning pins (9) which are distributed on the surface of the insert (6) and have a convex structure are arranged around the casting nozzle (8).
2. The improved structure of the injection mold for the composite plastic corner connecting card of the automobile sealing strip according to claim 1, characterized in that: the insert (6) is formed by a left insert (6-2) and a right insert (6-1), and the casting nozzle (8) is formed by semi-casting nozzles (8-1) respectively positioned on the left insert (6-2) and the right insert (6-1); the joint surface of the left insert (6-2) and the right insert (6-1) and the joint surface of the other half casting nozzle (8-1) are coplanar with the central plane of the runner (11).
3. The improved structure of the injection mold for the composite plastic corner connecting card of the automobile sealing strip according to claim 1 or 2, characterized in that: sealing strip supporting frames (4) are fixed on two sides of the die holder (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221412532.2U CN217916515U (en) | 2022-06-08 | 2022-06-08 | Improved structure of injection mold for composite plastic corner connecting card of automobile sealing strip |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221412532.2U CN217916515U (en) | 2022-06-08 | 2022-06-08 | Improved structure of injection mold for composite plastic corner connecting card of automobile sealing strip |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217916515U true CN217916515U (en) | 2022-11-29 |
Family
ID=84180743
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221412532.2U Expired - Fee Related CN217916515U (en) | 2022-06-08 | 2022-06-08 | Improved structure of injection mold for composite plastic corner connecting card of automobile sealing strip |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217916515U (en) |
-
2022
- 2022-06-08 CN CN202221412532.2U patent/CN217916515U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20221129 |