CN202878619U - Injection head structure of plastic package automatic die - Google Patents
Injection head structure of plastic package automatic die Download PDFInfo
- Publication number
- CN202878619U CN202878619U CN201220478570.8U CN201220478570U CN202878619U CN 202878619 U CN202878619 U CN 202878619U CN 201220478570 U CN201220478570 U CN 201220478570U CN 202878619 U CN202878619 U CN 202878619U
- Authority
- CN
- China
- Prior art keywords
- injection head
- ring
- sealing ring
- barrel
- injection
- Prior art date
- 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 - Lifetime
Links
- 238000002347 injection Methods 0.000 title claims abstract description 38
- 239000007924 injection Substances 0.000 title claims abstract description 38
- 239000004033 plastic Substances 0.000 title claims abstract description 9
- 238000007789 sealing Methods 0.000 claims abstract description 17
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims abstract description 9
- 239000004810 polytetrafluoroethylene Substances 0.000 claims abstract description 9
- -1 polytetrafluoroethylene Polymers 0.000 claims abstract description 5
- 238000004806 packaging method and process Methods 0.000 claims description 7
- 239000000463 material Substances 0.000 claims description 4
- 239000002699 waste material Substances 0.000 abstract description 7
- 238000012423 maintenance Methods 0.000 abstract description 4
- 238000010586 diagram Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 210000003205 muscle Anatomy 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
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- Gasket Seals (AREA)
Abstract
The utility model provides an automatic mould injection head structure of plastic envelope, it makes can ensure the sealed between injection head and feed cylinder, ensures that the waste material can not enter into below the first working face of injection, and the maintenance cost is low. The injection device comprises an injection head and a charging barrel, wherein the inner annular surface of the charging barrel is sleeved on the upper annular surface of the injection head, and the injection device is characterized in that: the annular surface of the upper part of the injection head is provided with an annular groove, a sealing ring is sleeved in the annular groove, the outer annular surface of the sealing ring is tightly attached to the inner annular surface of the charging barrel, and the sealing ring is made of polytetrafluoroethylene.
Description
Technical field
The utility model relates to the technical field of semiconductor packages machine construction, is specially a kind of plastic packaging automatic mold replacement type injection head structure.
Background technology
Existing plastic packaging automatic mold replacement type injection head structure, see Fig. 1, the top anchor ring 4 of its injection head 1 and barrel 2 are close contact a little between the inner ring surface 3, in the course of the work, mutually friction between the top anchor ring 4 of injection head 1 and the inner ring surface 3 of barrel 2, long-term friction process is so that the gap occurs between the inner ring surface of the top anchor ring of injection head and barrel, the silicon grain waste material of resin can enter die bottom plate, the injection head base of gap and below, gap, and it produces following defective:
1, the waste material in the following gap of injection head working face can cause: thus the unstable generation of injection moulding speed sleave, pore and not filling etc.;
2, the waste material that drops on the die bottom plate can cause: thus the counterdie push rod not exclusively resets and produces the counterdie push rod degree of depth exceeds standard, lead frame is pressed distortion even island damaged by pressure etc.;
3, to arrive base along injection rod in each injection process inner for the waste material on the injection head base, causes buffer spring to lose efficacy, unusually companys of the generation muscle situation generation of arching upward of injecting curve.
When finding that the gap exists, often need whole injection head to change together, it changes complicated, and maintenance cost is high.
Summary of the invention
For the problems referred to above, the utility model provides a kind of plastic packaging automatic mold replacement type injection head structure, and it guarantee that waste material can not enter into below the injection head working face, and maintenance cost is low so that can guarantee sealing between injection head and barrel.
A kind of plastic packaging automatic mold replacement type injection head structure, its technical scheme is such: it comprises injection head, barrel, the inner ring surface of described barrel is set in the top anchor ring of described injection head, it is characterized in that: the top anchor ring of described injection head has annular groove, ring set is in described annular groove, the cylindrical anchor ring of described sealing ring is close to the inner ring surface of described barrel, and the material of described sealing ring is polytetrafluoroethylene (PTFE).
After using structure of the present utility model, because the top anchor ring of injection head has annular groove, ring set is in annular groove, the cylindrical anchor ring of sealing ring is close to the inner ring surface of barrel, the material of sealing ring is polytetrafluoroethylene (PTFE), the coefficient of friction of teflin ring is extremely low, so that sealing ring can effectively play sealing function, guarantees that waste material can not enter into below the injection head working face; In time the inner ring surface of sealing ring and barrel produces the gap, can in time change sealing ring, and it changes convenient, causes maintenance cost low.
Description of drawings
Fig. 1 is existing plastic packaging automatic mold replacement type injection head structure schematic diagram;
Fig. 2 is front view sectional structure schematic diagram of the present utility model.
The specific embodiment
See Fig. 2, it comprises injection head 1, barrel 2, the inner ring surface 3 of barrel 2 is set in the top anchor ring 4 of injection head 1, the top anchor ring 4 of injection head 1 has annular groove 5, sealing ring 6 is set in the annular groove 5, the cylindrical anchor ring of sealing ring 6 is close to the inner ring surface 3 of barrel 2, and the material of sealing ring 6 is polytetrafluoroethylene (PTFE).
Claims (1)
1. plastic packaging automatic mold replacement type injection head structure, it comprises injection head, barrel, the inner ring surface of described barrel is set in the top anchor ring of described injection head, it is characterized in that: the top anchor ring of described injection head has annular groove, ring set is in described annular groove, the cylindrical anchor ring of described sealing ring is close to the inner ring surface of described barrel, and the material of described sealing ring is polytetrafluoroethylene (PTFE).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220478570.8U CN202878619U (en) | 2012-09-19 | 2012-09-19 | Injection head structure of plastic package automatic die |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220478570.8U CN202878619U (en) | 2012-09-19 | 2012-09-19 | Injection head structure of plastic package automatic die |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202878619U true CN202878619U (en) | 2013-04-17 |
Family
ID=48070081
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201220478570.8U Expired - Lifetime CN202878619U (en) | 2012-09-19 | 2012-09-19 | Injection head structure of plastic package automatic die |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202878619U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102837403A (en) * | 2012-09-19 | 2012-12-26 | 无锡红光微电子有限公司 | Injection head structure of plastic package automatic die |
-
2012
- 2012-09-19 CN CN201220478570.8U patent/CN202878619U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102837403A (en) * | 2012-09-19 | 2012-12-26 | 无锡红光微电子有限公司 | Injection head structure of plastic package automatic die |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130417 |
|
| CX01 | Expiry of patent term |