CN108621391A - A kind of pin for injection mold - Google Patents
A kind of pin for injection mold Download PDFInfo
- Publication number
- CN108621391A CN108621391A CN201810319182.7A CN201810319182A CN108621391A CN 108621391 A CN108621391 A CN 108621391A CN 201810319182 A CN201810319182 A CN 201810319182A CN 108621391 A CN108621391 A CN 108621391A
- Authority
- CN
- China
- Prior art keywords
- pin
- cavity
- cooling tube
- injection mold
- trepanning
- 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.)
- Pending
Links
- 238000002347 injection Methods 0.000 title claims abstract description 30
- 239000007924 injection Substances 0.000 title claims abstract description 30
- 238000001816 cooling Methods 0.000 claims abstract description 93
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 34
- 238000012546 transfer Methods 0.000 claims description 32
- 238000003825 pressing Methods 0.000 claims description 17
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 3
- 229910052802 copper Inorganic materials 0.000 claims description 3
- 239000010949 copper Substances 0.000 claims description 3
- 238000001727 in vivo Methods 0.000 claims description 2
- 239000000498 cooling water Substances 0.000 abstract description 8
- 238000001746 injection moulding Methods 0.000 description 8
- 239000000110 cooling liquid Substances 0.000 description 6
- 238000004663 powder metallurgy Methods 0.000 description 5
- 230000007547 defect Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 239000007788 liquid Substances 0.000 description 3
- 239000002826 coolant Substances 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 238000012797 qualification Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 1
- 230000009969 flowable effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
Classifications
-
- 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
- B29C45/72—Heating or cooling
- B29C45/73—Heating or cooling of the mould
-
- 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
Abstract
The present invention relates to injection mold fields, and in particular to a kind of pin for injection mold.A kind of pin for injection mold, including pin ontology and cooling tube, the pin body interior is provided with along the first axially extending cavity of pin ontology, the top of the cooling tube is stretched into the first cavity, gap setting between the cooling tube and the first cavity, the top end face of the cooling tube is contacted with the inner top surface of first cavity, the top of the cooling tube is provided with inside connection cooling tube and the groove body of the first cavity, the cooling tube is connected to water inlet line, and first cavity is connected to outlet conduit.The structure for solving pin existing in the prior art is not combined well with cooling water channel, the small problem of cooling range.
Description
Technical field
The present invention relates to injection mold fields, and in particular to a kind of pin for injection mold.
Background technology
The product quality of each group forming cavity and qualification rate problem in automobile lamp, mold are the factors being affected to it
One of, the problem of product quality and qualification rate in mold influence 50% or more.Uniform mould temperature can realize the uniform of product
It is cooling, the defect of product is reduced to greatest extent, while shortening molding cycle.Pin is that frequency of use is higher in mold design
Structure.The use of pin so that the structure of mold more is enriched, and mold more tends to high-endization.
Product inhomogeneous cooling is easily led to without water route design in pin, deformation of products can be caused first, secondly can lead to product
There is the defects of shrink mark, stress trace.These defects have seriously affected product appearance quality, product size and molding cycle etc..Shen
Number a kind of cooling pin of powder metallurgy injection molding please be disclosed for an application of CN201520318848.9, and specifically disclosed：The mould
Be provided with cooling water channel in specific, the cooling pin of powder metallurgy injection molding intersects with the cooling water channel, specific works when
It waits, cooling water circulates in the cooling water channel tentatively cools down to the mold, at the same time, due to the powder metallurgy
The cooling pin of injection molding intersects with the cooling water channel, and the cooling pin of powder metallurgy injection molding is embedded in the mold
, so can be molded cooling pin by the powder metallurgy carries out deep temperature reduction to the mold, to promote cooling-down effect.On
Although disclosing the pin with refrigerating function in the application stated, the cooling water channel of the pin in above-mentioned application is arranged in mould
In tool, and cooled region is smaller, and only at the middle part of pin, in this case, pin only coordinates specific mold that could realize
Refrigerating function, and cooling position compares concentration, has a certain impact to cooling effect.
Invention content
Structure in order to solve pin existing in the prior art is not combined well with cooling water channel, and cooling range is small
The problem of, the present invention proposes a kind of pin for injection mold, solves above-mentioned technical problem.Technical scheme of the present invention is such as
Under：
A kind of pin for injection mold, including pin ontology and cooling tube, the pin body interior are provided with edge
The first axially extending cavity of pin ontology, the top of the cooling tube are stretched into the first cavity, the cooling tube and the first chamber
Gap setting between body, the top end face of the cooling tube are contacted with the inner top surface of first cavity, the top of the cooling tube
Be provided with inside connection cooling tube and the groove body of the first cavity, the cooling tube is connected to water inlet line, first cavity and
Outlet conduit is connected to.By the way that in pin body interior gap setting cooling tube, cooling liquid can be flow to along the inside of cooling tube
In first cavity, realizes that the cooling to pin, entire cooling system are arranged inside pin, be conducive to pin suitable for different
Injection mold, and the inner top surface of cooling tube and the first cavity contacts, in this way, the flowable top to pin of cooling liquid, cold
But range is larger, it can be achieved that good cooling to pin.
Further, the distance between top surface of the inner top surface of first cavity and pin ontology is 15-20mm.
Further, the cooling tube is copper pipe.
Further, the diameter of first cavity is not less than 6mm, the side wall of the corresponding pin ontology of first cavity
Thickness be not less than 2mm, the thickness of the cooling tube is not less than 1mm, between the outer wall of the cooling tube and the first cavity inner wall
Clearance distance be not less than 1mm.
Further, further include transfer block, the transfer block is internally provided with the second cavity being connected to the first cavity, institute
It states transfer block to connect with pin ontology, the lower gap of the cooling tube is arranged in the second cavity.
Further, the lower end of the pin ontology is provided with hanging platform, and internal thread, the switching are provided on the hanging platform
The upper end of block is extended with connecting pin, on the connecting pin with the hanging platform screw-thread fit.
Further, the first trepanning and the second trepanning are provided in the transfer block, first trepanning is connected to cooling tube
Internal and water inlet line, second trepanning are connected to the second cavity and outlet conduit.
Further, first trepanning is arranged in the lower end of transfer block, and the lower end of the cooling tube is stretched into and is resisted against
The water inlet end of the water outlet of first trepanning, first trepanning is threadedly coupled with water inlet line, and the second trepanning setting is turning
It connects on the side wall of block, second trepanning and outlet conduit are threadedly coupled.
Further, the water inlet line and the outlet conduit are hollow hexagonal rod, the water inlet line and institute
It states one end that outlet conduit is connect with transfer block and is extended with connecting pin, external screw thread is both provided on connecting pin.
Further, further include pin pressing plate, the pin pressing plate is set on the connecting pin of transfer block and compresses pin
Ontology, the pin pressing plate are fixedly connected with the mavable module core in injection mold.
Based on the above-mentioned technical proposal, the technique effect achieved by the present invention is：
It, can be by being passed through cooling liquid 1. the pin for injection mold of the present invention, internal to carry cooling duct
Pin is cooled down when injection molding, also can guarantee the uniform cooling of product, avoid because inhomogeneous cooling cause deformation of products, shrink mark,
The product defects such as stress trace shorten the formed product period；
2. the inner top surface contact of the cooling tube and the first cavity of the pin for injection mold of the present invention, and cooling tube
Top is provided with inside connection cooling tube and the groove body of the first cavity, can so ensure that cooling liquid moves to the top of cooling tube
End, cooling range is big, and realization is fully cooled pin；
Be not in coolant liquid 3. the cooling structure of the pin for injection mold of the present invention is arranged in the inside of pin
The problem of body leaks, it is safe；In addition, installing and dismounting is more convenient；
4. the inner top surface of the first cavity of the pin ontology of the pin for injection mold of the present invention is apart from pin ontology
The distance between top surface be 15-20mm, reserved safe distance while ensureing cooling product, when preventing the first cavity of processing
Damage pin；
5. each thickness and diameter of the pin for injection mold of the present invention carry out certain restriction, can be effectively
Flowing of the cooling liquid inside pin, and extend the service life of pin.
Description of the drawings
Fig. 1 is the structural schematic diagram of the pin of the present invention；
Fig. 2 is the usage state diagram of the pin of the present invention；
In figure：1- pin ontologies；11- hanging platforms；2- cooling tubes；21- groove bodies；3- pin pressing plates；4- transfer blocks；41- connections
End；The first trepannings of 42-；The second trepannings of 43-；5- water inlet lines；6- outlet conduits；7- products；8- mavable module cores；9- fixed mold cores.
Specific implementation mode
Present disclosure is further described with reference to the accompanying drawings of the specification.
As shown in Figs. 1-2, a kind of pin for injection mold, including pin ontology 1 and cooling are present embodiments provided
Pipe 2, pin ontology 1 are internally provided with along the first axially extending cavity of pin ontology 1, and the first chamber is stretched on the top of cooling tube 2
In vivo, for being cooled down to pin ontology 1 and injecting products.Gap setting between cooling tube 2 and the first cavity, cooling tube
2 top end face is contacted with the inner top surface of the first cavity, and the top of cooling tube 2 is provided with 2 inside of connection cooling tube and the first cavity
Groove body 21, cooling tube 2 is connected to water inlet line 5, and the first cavity is connected to outlet conduit 6.
The head of pin ontology 1 participates in the injection molding of product 7, and pin ontology 1 is internally provided with axial along pin ontology 1
Extend the first cavity, the first cavity it is opening down, it is preferable that the internal diameter of the first cavity be not less than 6mm, the first cavity correspond to
Pin ontology 1 side wall thickness be not less than 2mm, the inner top surface of the first cavity and the distance between the top surface of pin ontology 1
For 15-20mm.
The lower end of pin ontology 1 is provided with hanging platform 11, it is preferable that hanging platform 11 and pin ontology 1 are integrally formed.On the one hand,
Hanging platform 11 plays the positioning action to pin ontology 1.Specifically, it can be realized to pin ontology by the way that the shape of hanging platform 11 is arranged
1 is positioned, and prevents pin ontology 1 from rotating in a mold.Preferably, the shape of hanging platform 11 is side with the cylindric of section,
Columned outer diameter is more than the outer diameter of pin ontology 1.On the other hand, hanging platform 11 plays the role of connecting with transfer block 4, hanging platform 11
On be provided with the through-hole being connected to the first cavity, be provided with internal thread on the inner wall of the oral area of through-hole, for and 4 screw thread of transfer block connect
It connects.Preferably, the oral area of hanging platform 11 attacks 1/4 " PT teeth, it is highly preferred that PT teeth to the hanging platform 11 of pin ontology 1 top surface distance not
Less than 5mm.
Transfer block 4 and hanging platform 11 are threadedly coupled, and the upper end of transfer block 4 is extended with connecting pin 41, is provided on connecting pin 41
With the external screw thread of the screw-internal thread fit on hanging platform 11.The second opening up cavity is provided in transfer block 4.When 4 He of transfer block
After hanging platform 11 is threadedly coupled, the first cavity and the connection of the second cavity, and the first cavity and the second cavity are located on same center line.
The first trepanning 42 and the second trepanning 43 are additionally provided in transfer block 4, the first trepanning 42 is used to be connected to inside and the water inlet of cooling tube 2
Pipeline 5, water inlet end and water inlet line 5 connection of the first trepanning 42, it is preferable that the first trepanning 42 is arranged in the bottom of transfer block 4,
The water inlet end of first trepanning 42 is provided with internal thread, and the water inlet end and water inlet line 5 of the first trepanning 42 are threadedly coupled.Cooling tube 2
Lower end stretch into the water outlet of the first trepanning 42, cooling tube 2 is connected to the first trepanning 42.Preferably, the water outlet of the first trepanning 42
The internal diameter at end is more than the internal diameter of middle flow section, in this way, rear and the first trepanning 42 in the first trepanning 42 is stretched into the bottom end of cooling tube 2
Water outlet be fitted close, the bottom end of cooling tube 2 can also be resisted against the water outlet of the first trepanning 42 and point of middle flow section
At boundary, the limit to cooling tube 2 is realized by pin ontology 1 and transfer block 4.Second trepanning 43 is for being connected to the second cavity and going out
Waterpipe 6, it is preferable that the second trepanning 43 is the through-hole being arranged on the side wall of transfer block 4, and interior spiral shell is provided in the second trepanning 43
Line is threadedly coupled between the second trepanning 43 and outlet conduit 6.Water inlet line 5 and outlet conduit 6 are used for Inlet and outlet water, it is preferable that into
Waterpipe 5 and outlet conduit 6 are hollow hexagonal rod, and one end that water inlet line 5 and outlet conduit 6 are connect with transfer block 4 is equal
It is extended with connecting pin, external screw thread is both provided on connecting pin.
Cooling tube 2 is located in the cavity that the first cavity and the second cavity collectively form, specifically, the upper bit of cooling tube 2
In in the first cavity, and gap setting between cooling tube 2 and the first cavity, the i.e. inner wall of the outer diameter of cooling tube 2 and the first cavity
Between have gap, it is preferable that the distance in the gap between the outer diameter of the cooling tube 2 and the inner wall of the first cavity is not less than
1mm.The lower part of cooling tube 2 is located in the second cavity, and the gap setting between the second cavity, i.e. the outer diameter of cooling tube 2 and
There is gap between the inner wall of one cavity, it is preferable that gap between the outer diameter of the cooling tube 2 and the inner wall of the first cavity
Distance is not less than 1mm.The inner top surface of the top end face of cooling tube 2 and the first cavity is in close contact, and the bottom end of cooling tube 2 is inserted into first
The water outlet of trepanning 42.The top of cooling tube 2 is provided with the groove body 21 of 2 inside and the first cavity of connection cooling tube, it is preferable that described
The quantity of groove body is two, and the groove body is U-type groove.The water outlet of the first trepanning 42 of transfer block 4 is inserted into the lower end of cooling tube 2
End.Preferably, cooling tube 2 is copper pipe, and the thickness of cooling tube 2 is not less than 1mm.
The pin of the present invention further includes pin pressing plate 3, and pin pressing plate 3 is fixedly connected with the mavable module core 8 in injection mold, excellent
Selection of land, pin pressing plate 3 are fixedly connected with mavable module core by screw.For pin pressing plate 3 for compressing pin ontology 1, pin pressing plate 3 is tight
The upper surface in the outside of the close connecting pin 41 for being set in transfer block 4, surrounding empty avoiding, pin pressing plate 3 compresses hanging platform 11, pin pressing plate
3 lower end is extended with a circle extension, clearance fit between extension and transfer block 4.Preferably, the shape of pin pressing plate 3 is rectangular.
Based on above-mentioned pin structure, when in use, pin ontology 1 stretches into the mavable module core 8 in injection mold, product 7
The injection molding under the collective effect of mavable module core 8 and fixed mold core 9, the head of pin ontology 1 participate in the injection molding of product 7, hang
11 start-stop of platform transfers to use, prevents pin ontology 1 from being rotated in mavable module core, and pin pressing plate 3 compresses pin ontology 1, prevents pin sheet
Body 1 teetertotters, and pin pressing plate 3 is fixedly connected by screw with mavable module core, and cooling liquid enters cooling by water inlet line 5
In pipe 2, the top of cooling tube 2 is flowed to, the first cavity, the liquid in the first cavity are flow to by the U-type groove at 2 top of cooling tube
It flows in the second cavity, then outlet conduit 6 is reached by the second trepanning 43, flowed out finally by outlet conduit 6, form coolant liquid
Body circulates, and realizes cooling cycle.
Embodiments of the present invention are explained in detail above in conjunction with attached drawing, but the present invention is not limited to above-mentioned implementations
Mode within the knowledge of a person skilled in the art can also be in the premise for not departing from spirit of the invention
Under make a variety of changes.
Claims (10)
1. a kind of pin for injection mold, which is characterized in that including pin ontology (1) and cooling tube (2), the pin sheet
Body (1) is internally provided with along the first axially extending cavity of pin ontology (1), and the first chamber is stretched on the top of the cooling tube (2)
In vivo, gap setting between the cooling tube (2) and the first cavity, top end face and first cavity of the cooling tube (2)
Inner top surface contact, the top of the cooling tube (2) is provided with that connection cooling tube (2) is internal and the groove body (21) of the first cavity,
The cooling tube (2) is connected to water inlet line (5), and first cavity is connected to outlet conduit (6).
2. a kind of pin for injection mold as described in claim 1, which is characterized in that the inner top surface of first cavity
The distance between top surface of pin ontology (1) is 15-20mm.
3. a kind of pin for injection mold as described in claim 1, which is characterized in that the cooling tube (2) is copper pipe.
4. a kind of pin for injection mold as described in any one of claims 1-3, which is characterized in that first cavity
Diameter be not less than 6mm, the thickness of the side wall of the corresponding pin ontology (1) of first cavity is not less than 2mm, the cooling tube
(2) thickness is not less than 1mm, and the clearance distance between the outer wall and the first cavity inner wall of the cooling tube (2) is not less than 1mm.
5. a kind of pin for injection mold according to any one of claims 1-4, which is characterized in that further include transfer block
(4), the transfer block (4) is internally provided with the second cavity being connected to the first cavity, the transfer block (4) and pin ontology
(1) it connects, the lower gap of the cooling tube (2) is arranged in the second cavity.
6. a kind of pin for injection mold as claimed in claim 5, which is characterized in that under the pin ontology (1)
End is provided with hanging platform (11), internal thread is provided on the hanging platform (11), the upper end of the transfer block (4) is extended with connecting pin
(41), the connecting pin (41) and the hanging platform (11) screw-thread fit.
7. such as a kind of pin for injection mold described in claim 5 or 6, which is characterized in that set on the transfer block (4)
It is equipped with the first trepanning (42) and the second trepanning (43), the first trepanning (42) connection cooling tube (2) inside and water inlet line
(5), second trepanning (45) is connected to the second cavity and outlet conduit (6).
8. a kind of pin for injection mold as claimed in claim 7, which is characterized in that the first trepanning (42) setting
The water outlet of the first trepanning (42) is stretched into and are resisted against in lower end in transfer block (4), the lower end of the cooling tube (2), and described
The water inlet end of one trepanning (42) is threadedly coupled with water inlet line (5), side wall of the second trepanning (43) setting in transfer block (4)
On, second trepanning (43) and outlet conduit (6) are threadedly coupled.
9. such as a kind of pin for injection mold of claim 1-8 any one of them, which is characterized in that the water inlet line
(5) and the outlet conduit (6) is hollow hexagonal rod, the water inlet line (5) and the outlet conduit (6) and transfer block
(4) one end connected is extended with connecting pin, and external screw thread is both provided on connecting pin.
10. such as a kind of pin for injection mold of claim 1-9 any one of them, which is characterized in that further include pin
Pressing plate (3), the pin pressing plate (3) are set on the connecting pin (41) of transfer block (4) and compress pin ontology (1), the edge
Needle pressing plate (3) is fixedly connected with the mavable module core (7) in injection mold.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810319182.7A CN108621391A (en) | 2018-04-11 | 2018-04-11 | A kind of pin for injection mold |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810319182.7A CN108621391A (en) | 2018-04-11 | 2018-04-11 | A kind of pin for injection mold |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108621391A true CN108621391A (en) | 2018-10-09 |
Family
ID=63705090
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810319182.7A Pending CN108621391A (en) | 2018-04-11 | 2018-04-11 | A kind of pin for injection mold |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108621391A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112296308A (en) * | 2020-10-27 | 2021-02-02 | 佛山市和阳精密金属制品有限公司 | Die-casting die |
| CN115446285A (en) * | 2022-08-29 | 2022-12-09 | 肇庆鸿泰模具制造有限公司 | Single-point type circulating cooling device and die of adjacent insert pins |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201471697U (en) * | 2009-08-05 | 2010-05-19 | 王伟杰 | Water-cooling loop device of single blind-hole passage |
| CN104439154A (en) * | 2014-12-26 | 2015-03-25 | 东莞市东升压铸模具有限公司 | Fixed point type cooling water channel die-casting mold |
| CN204584276U (en) * | 2015-05-18 | 2015-08-26 | 凯莱模具（深圳）有限公司 | A kind of powder metallurgy injection moulding cooling pin |
| CN206484816U (en) * | 2017-02-21 | 2017-09-12 | 中亿腾模塑科技（苏州）有限公司 | A kind of plastic mould for being provided with efficient cooling water channel |
| CN211492717U (en) * | 2018-04-11 | 2020-09-15 | 常州星宇车灯股份有限公司 | Insert pin for injection mold |
-
2018
- 2018-04-11 CN CN201810319182.7A patent/CN108621391A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201471697U (en) * | 2009-08-05 | 2010-05-19 | 王伟杰 | Water-cooling loop device of single blind-hole passage |
| CN104439154A (en) * | 2014-12-26 | 2015-03-25 | 东莞市东升压铸模具有限公司 | Fixed point type cooling water channel die-casting mold |
| CN204584276U (en) * | 2015-05-18 | 2015-08-26 | 凯莱模具（深圳）有限公司 | A kind of powder metallurgy injection moulding cooling pin |
| CN206484816U (en) * | 2017-02-21 | 2017-09-12 | 中亿腾模塑科技（苏州）有限公司 | A kind of plastic mould for being provided with efficient cooling water channel |
| CN211492717U (en) * | 2018-04-11 | 2020-09-15 | 常州星宇车灯股份有限公司 | Insert pin for injection mold |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112296308A (en) * | 2020-10-27 | 2021-02-02 | 佛山市和阳精密金属制品有限公司 | Die-casting die |
| CN115446285A (en) * | 2022-08-29 | 2022-12-09 | 肇庆鸿泰模具制造有限公司 | Single-point type circulating cooling device and die of adjacent insert pins |
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