CN103707455B - Bottle cap injection molding process and mould in a kind of medical EVA - Google Patents
Bottle cap injection molding process and mould in a kind of medical EVA Download PDFInfo
- Publication number
- CN103707455B CN103707455B CN201210481986.XA CN201210481986A CN103707455B CN 103707455 B CN103707455 B CN 103707455B CN 201210481986 A CN201210481986 A CN 201210481986A CN 103707455 B CN103707455 B CN 103707455B
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- China
- Prior art keywords
- plate
- guide pillar
- bottle cap
- core
- 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 - Fee Related
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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
-
- 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
-
- 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
- B29C45/32—Moulds having several axially spaced mould cavities, i.e. for making several separated articles
-
- 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
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2023/00—Use of polyalkenes or derivatives thereof as moulding material
- B29K2023/04—Polymers of ethylene
- B29K2023/08—Copolymers of ethylene
- B29K2023/083—EVA, i.e. ethylene vinyl acetate copolymer
-
- 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
- B29L2031/56—Stoppers or lids for bottles, jars, or the like, e.g. closures
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
Abstract
The invention belongs to the shaping of plastics or connection area, especially use injection mo(u)lding to make technique and the device of an one integral piece, relate to bottle cap injection molding process and mould in a kind of medical EVA.Complicated for Bottle cap structure in medical EVA, medical equipment sanitary standard is high, injection molding process and mould require high characteristic, design injection molding process: matched moulds is injected, solidifying sprue bush deviate from by material, master's (propping up) runner is opened, plastic deviates from die cavity, plastic is released; The present invention also develops injection forming mold, comprises cover half seat, cavity plate, push piece plate, core, core fixing plate, support plate, sprue bush, dynamic model seat, push pedal, cooling water channel, with groove guide pillar, band keyway guide pillar.The present invention adopts spot pouring mouth to inject, and is beneficial to the filling flow of EVA melt; Based on the elasticity that EVA is good, select forced stripper mechanism, avoid inner side core-pulling, save die cost; The high-quality a large amount achieving 1 mould 32 chamber is produced.
Description
Technical field
The invention belongs to the shaping of plastics or connection area, especially use injection mo(u)lding to make technique and the device of an one integral piece, relate to bottle cap injection molding process and mould in a kind of medical EVA.
Background technology
At present, a lot of infusion solutions liquid still adopts glass bottle packaging; The aluminum cap packaging that traditional glass bottle adopts natural rubber plug and not easily opens, there is many shortcomings, particularly natural rubber plug is easily aging, easily bits are fallen when poor air-tightness, acupuncture, and the additive in plug lose in liquid molten and puncture take out medicine time the buffings particulate matter that splits away off can block microcirculation in human body, thrombocytolysis also can be caused hemorrhage.Thus, numerous producers adopt vial and ethene-vinyl acetate copolymer (EVA) to make bottle cap as Key works Drug packing.
Chinese patent CN201275857Y discloses a kind of injection mold for anti-theft bottle cap, outside module and inner side module substep is adopted to depart from mode, solve the breakage problem of knockout course tie point, make mould axially can complete demoulding work, module is formed and greatly reduces, and reduces the collision between die size and module; Chinese patent CN201784138U discloses a kind of injection mould with inverted bottle covers, and solving drinking bottle cap can not the problem of the effective demoulding, and yield rate is high, economize on resources.Above-mentioned patented technology all adopts traditional injection moulding moulding process, and plastic product precision is lower, is difficult to be applied to the injection mo(u)lding of medical EVA bottle cap.
Infusion solutions glass cap is made up of interior bottle cap and interior bottle cap, complex structure, and the sanitary standard of medical equipment is high, requires high to injection molding process and mould.The present invention, in conjunction with interior Bottle cap structure feature, designs bottle cap injection molding process and mould equipment in EVA.
Summary of the invention
The object of the invention is to: for Bottle cap structure feature in medical EVA, propose bottle cap injection molding process and mould in a kind of medical EVA, the high-quality a large amount realizing 1 mould 32 chamber is produced.
The object of the invention is to be achieved through the following technical solutions.
Bottle cap injection molding process in medical EVA of the present invention, comprises matched moulds injection, solidifying sprue bush is deviate from by material, master's (prop up) runner is opened, plastic deviates from die cavity, plastic release; Technical process is as follows:
(1) matched moulds injection: mould matched moulds, injector is shaping through injection, pressurize, cooled and solidified by the viscous state EVA melt after plasticizing;
(2) sprue bush deviate from by solidifying material: solidifying material disconnects with injection nozzle, is separated from sprue bush;
(3) lead (propping up) runner to open: deviating to fall for solidifying material provides space;
(4) plastic deviates from die cavity: by pulling force the spot pouring mouth of solidifying material cut off being separated with plastic, and solidifying material is deviate from from the separation of master's (prop up) runner;
(5) plastic is released: plastic is forced to depart from core, collection of automatically falling.
Bottle cap injection molding process in medical EVA of the present invention, according to Bottle cap structure in EVA and material characteristics, adopts spot pouring mouth injection, is beneficial to the filling flow of EVA melt; Based on the elasticity that EVA is good, select forced stripper mechanism, avoid inner side core-pulling, save die cost.
Present invention also offers bottle cap injection in a kind of medical EVA, comprise cover half seat, cavity plate, push piece plate, core, core fixing plate, support plate, sprue bush, dynamic model seat, push pedal, cooling water channel, with groove guide pillar, band keyway guide pillar; Described sprue bush is built in described cover half seat; Described support plate is equipped with described with groove guide pillar with counterbore, described cover half seat, cavity plate, push piece plate and described with groove guide pillar matched in clearance, and can moves along described with groove guide pillar; Described band keyway guide pillar is assemblied in cover half seat counterbore, described cavity plate, push piece plate, core fixing plate, support plate, dynamic model seat and described band keyway guide pillar matched in clearance, and can move along described band keyway guide pillar; Maximal clearance between described cavity plate and described cover half seat should ensure that solidifying material can free falling; The final gap of described push piece plate and described cavity plate should ensure that plastic departs from described core and can free falling; Described core is fixed by described core fixing plate and described support plate, and described push piece plate, under push pedal drives, along the translation of core axis, can carry out forced stripper mechanism.
In described medical EVA, bottle cap injection also comprises centring ring, spring, sunk screw, for connecting described sprue bush and cover half seat; Described sprue bush hollow is arc surface with injection nozzle contact portion, sprue bush described in described spring forces and described injection nozzle close contact, without spilling when guaranteeing injection moulding.
In described medical EVA, bottle cap injection also comprises alignment pin, spring, holding screw, described alignment pin is packaged in described cavity plate by described holding screw, described alignment pin is oppressed by described spring, with described with groove guide pillar close contact, described with groove guide pillar has a groove, and described with groove guide pillar drives described cavity plate to move to right by groove and described alignment pin.
In described medical EVA, bottle cap injection also comprises distance screws, and described distance screws screws in described cavity plate, and inserts in the keyway of described band keyway guide pillar, limits the maximal clearance between described cavity plate and described cover half seat.
In described medical EVA, bottle cap injection also comprises ejector pin retaining plate, push rod, holding screw, ejector pin retaining plate and push pedal connect as one by described holding screw, push pedal is fixed on by described ejector pin retaining plate in described push rod one end, and the other end drives push piece plate, realizes forced stripper mechanism.
Bottle cap injection in described medical EVA, the stroke range of described push pedal is limited by described dynamic model seat.
In described medical EVA, bottle cap injection also comprises cooling water channel and soft copper plug, and described core is inserted in described soft copper plug one end, and the other end gos deep into cooling water channel, is lowered the temperature by the heat conduction of described core to cooling water.
In described medical EVA, bottle cap injection adopts 1 mould 32 chamber.
The invention has the beneficial effects as follows: the spot pouring mouth injection adopting EVA melt intercalation, ensure that plastic good looking appearance, be beneficial to the filling flow of EVA melt; Forced demoulding mechanism is simple and reliable, avoids inner side core-pulling, has saved die cost; Die joint selection and design of Cooling System rationally, improve finished product rate; Be widely used standard component in mould, save research and development manufacturing expense, shorten life cycle of the product, adopt 1 mould 32 chamber, improve production efficiency.Prove through production practices, the mould assembling action of opening of this mould meets designing requirement completely, and plastic part quality is stablized, and is suitable for producing in enormous quantities.
Accompanying drawing explanation
Fig. 1 is mould matched moulds of the present invention injection process chart;
Fig. 2 is mold cavity of the present invention distribution and cooling schematic diagram;
Fig. 3 is that mould of the present invention coagulates material and deviates from sprue bush process chart;
Fig. 4 is that mould master (propping up) runner of the present invention opens process chart;
Fig. 5 is that mould plastic of the present invention deviates from die cavity process chart;
Fig. 6 is that mould plastic of the present invention releases process chart;
Fig. 7 is the product sectional view adopting the present invention to produce;
Fig. 8 is the product top cross-sectional view adopting the present invention to produce.
Wherein: 1-cover half seat, 2-distance screws, 3-push piece plate, 4-core fixing plate, 5-support plate, the solidifying material of 6-, 7-sunk screw, 8-centring ring; 9-sprue bush, 10-spring, 11-plastic, 12-soft copper plug, 13-alignment pin, 14-spring, 15-holding screw, 16-dynamic model seat, 17-with groove guide pillar, 18-ejector pin retaining plate, 19-push rod, 20-holding screw, 21-push pedal, 22-cooling water channel, 23-core, 24-cavity plate, 25-is with keyway guide pillar, 26-injection moulding die cavity, 27-branch flow passage, 28-sprue.
Detailed description of the invention
Below in conjunction with drawings and Examples, the invention will be further described.
Bottle cap injection in a kind of medical EVA, see accompanying drawing 1, sprue bush 9 is built in cover half seat 1; Centring ring 8 is fixed on cover half seat 1 by sunk screw 7, and injection nozzle carries out injection moulding through centring ring 8 interstitial hole; Sprue bush 11 hollow, contacts with arc surface with described injection nozzle, and spring 10 oppresses sprue bush 9 and described injection nozzle close contact, without spilling when guaranteeing injection moulding; Centring ring 8 can prevent from sprue bush 9 from exposing under the effect of spring 8 dropping out.Support plate 5 is equipped with groove guide pillar 17 with counterbore, cover half seat 1, cavity plate 24, push piece plate 3 and with groove guide pillar 17 matched in clearance, and can moves along with groove guide pillar 17; Alignment pin 13 is packaged in cavity plate 24 by holding screw 15, and alignment pin 13 is oppressed by spring 14, with groove guide pillar 17 close contact, with groove guide pillar 17 has a groove, drives cavity plate 24 to move to right by described groove and alignment pin 13; On with groove guide pillar 17, the position of described groove determines the maximal clearance between cavity plate 24 and cover half seat 1, and described gap should ensure that solidifying material 6 can free falling.Band keyway guide pillar 25 is assemblied in cover half seat 1 counterbore, cavity plate 24, push piece plate 3, core fixing plate 4, support plate 5, dynamic model seat 16 and band keyway guide pillar 25 matched in clearance, and can move along band keyway guide pillar 25; Distance screws 2 screws in cavity plate 24, and inserts in the keyway of band keyway guide pillar 25, relies on the maximal clearance between described keyway length restriction cavity plate 24 and cover half seat 1.Core 23 is fixed by core fixing plate 4 and support plate 5, ejector pin retaining plate 18 and push pedal 21 connect as one by holding screw 20, push pedal 21 is fixed on by ejector pin retaining plate 18 in push rod 19 one end, and the other end drives push piece plate 3 along the translation of core 23 axis, realizes forced stripper mechanism; With the final gap of cavity plate 24, push piece plate 3 should ensure that plastic 11 departs from core 23, and can free falling.Flange is had, for limiting the stroke range of push pedal 21 outside dynamic model seat 16.Each core 23 all inserts soft copper plug 12, and the other end of soft copper plug 12 gos deep into cooling water channel 22, utilizes characteristic that soft copper heat transfer coefficient is high by core 23 heat conduction to cooling water channel 22, is lowered the temperature by circulating water.See accompanying drawing 2, the present invention adopts 1 mould 32 cavity configuration, and mould liquid and be injected to each die cavity 26 through sprue 28, branch flow passage 27, production efficiency is higher; Have 2 cooling water channels 22, lay respectively at the inner side of die cavity and the outside of inner side die cavity, outside, can effective cooling die cavity, can ensure that again running gate system temperature does not reduce; Article 2, the entrance and exit of cooling water channel converges, and is connected to form circulation cooling circuit with mould outer flexible tube.
Bottle cap injection molding process process in a kind of medical EVA, see accompanying drawing 1, matched moulds is injected: male and female mold matched moulds, injection nozzle overcomes the active force of spring 10, make sprue bush 9 and cover half seat 1, cavity plate 24, cavity plate 3, core 23 form confined space, the viscous state EVA melt after plasticizing is shaping through injection, pressurize, cooled and solidified.
See accompanying drawing 3, sprue bush 9 deviate from by solidifying material 6: injection nozzle moves to right, and under the effect of spring 10, sprue bush 9 moves to right to centring ring 8, and injection nozzle and solidifying material 6 disconnect.
See accompanying drawing 4, main (propping up) runner is opened: push pedal 21 moves to right, dynamic model seat 16, ejector pin retaining plate 18, push rod 19, support plate 5, core fixing plate 4, push piece plate 3, cavity plate 24, core 23, soft copper plug 12, cooling water channel 22 is driven to move to right by the outboard flanges of dynamic model seat 16, deviate from solidifying material 6, solidifying material 6 falls recycling automatically.
See accompanying drawing 5, plastic 11 deviates from die cavity: push pedal 21 continues to move to right, distance screws 2 arrives the right-hand member keyway of band keyway guide pillar 25, cavity plate 24 be hampered power stop move to right, alignment pin 13 exits the groove of with groove guide pillar 17, and ejector pin retaining plate 18, push rod 19, support plate 5, core fixing plate 4, push piece plate 3, core 23, soft copper plug 12, cooling water channel 22 continue to move to right, due to contraction during melt cooling, plastic 11 packs tightly on core 23, under it drives, deviate from cavity plate 24.
See accompanying drawing 6, deviate from plastic 11: push pedal 21 moves to left, drive the relative core 23 of ejector pin retaining plate 18, push rod 19, push piece plate 3 to move to left, make plastic 11 force to depart from core 23.
So far mould completes an injection cycle, and the product sectional view that employing the present invention produces is see accompanying drawing 7, and product top cross-sectional view is see accompanying drawing 8.Dynamic model seat 16 moves to left subsequently, injection nozzle moves to right reset, carries out next injection cycle.
Claims (8)
1. a bottle cap injection in medical EVA, comprises cover half seat, cavity plate, push piece plate, core, core fixing plate, support plate, sprue bush, dynamic model seat, push pedal, cooling water channel, with groove guide pillar, band keyway guide pillar; It is characterized in that: described sprue bush is built in described cover half seat; Described support plate is equipped with described with groove guide pillar with counterbore, described cover half seat, cavity plate, push piece plate and described with groove guide pillar matched in clearance, and can moves along described with groove guide pillar; Described band keyway guide pillar is assemblied in cover half seat counterbore, described cavity plate, push piece plate, core fixing plate, support plate, dynamic model seat and described band keyway guide pillar matched in clearance, and can move along described band keyway guide pillar; Maximal clearance between described cavity plate and described cover half seat should ensure that solidifying material can free falling; The final gap of described push piece plate and described cavity plate should ensure that plastic departs from described core and can free falling; Described core is fixed by described core fixing plate and described support plate, and described push piece plate, under push pedal drives, along the translation of core axis, can carry out forced stripper mechanism.
2. bottle cap injection in medical EVA according to claim 1, is characterized in that: also comprise centring ring, spring, sunk screw, for connecting described sprue bush and cover half seat; Described sprue bush hollow is arc surface with injection nozzle contact portion, sprue bush described in described spring forces and described injection nozzle close contact, without spilling when guaranteeing injection moulding.
3. bottle cap injection in medical EVA according to claim 1, it is characterized in that: also comprise alignment pin, spring, holding screw, described alignment pin is packaged in described cavity plate by described holding screw, described alignment pin is oppressed by described spring, with described with groove guide pillar close contact, described with groove guide pillar has a groove, and described with groove guide pillar drives described cavity plate to move to right by groove and described alignment pin.
4. bottle cap injection in medical EVA according to claim 1, it is characterized in that: also comprise distance screws, described distance screws screws in described cavity plate, and inserts in the keyway of described band keyway guide pillar, limits the maximal clearance between described cavity plate and described cover half seat.
5. bottle cap injection in medical EVA according to claim 1, it is characterized in that: also comprise ejector pin retaining plate, push rod, holding screw, ejector pin retaining plate and push pedal connect as one by described holding screw, push pedal is fixed on by described ejector pin retaining plate in described push rod one end, the other end drives push piece plate, realizes forced stripper mechanism.
6. bottle cap injection in medical EVA according to claim 1, is characterized in that: the stroke range of described push pedal is limited by described dynamic model seat.
7. bottle cap injection in medical EVA according to claim 1, it is characterized in that: also comprise cooling water channel and soft copper plug, described core is inserted in described soft copper plug one end, and the other end gos deep into cooling water channel, is lowered the temperature by the heat conduction of described core to cooling water.
8. bottle cap injection in medical EVA according to claim 1, is characterized in that: adopt 1 mould 32 chamber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210481986.XA CN103707455B (en) | 2012-11-25 | 2012-11-25 | Bottle cap injection molding process and mould in a kind of medical EVA |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210481986.XA CN103707455B (en) | 2012-11-25 | 2012-11-25 | Bottle cap injection molding process and mould in a kind of medical EVA |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103707455A CN103707455A (en) | 2014-04-09 |
| CN103707455B true CN103707455B (en) | 2016-02-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210481986.XA Expired - Fee Related CN103707455B (en) | 2012-11-25 | 2012-11-25 | Bottle cap injection molding process and mould in a kind of medical EVA |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103707455B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108527748B (en) * | 2018-04-21 | 2023-11-28 | 台州市黄岩得奕隆模具有限公司 | capping machine |
| CN110256061A (en) * | 2019-08-04 | 2019-09-20 | 娄底市远程精密结构陶瓷有限责任公司 | A kind of biology speciality ceramics and preparation method thereof |
| CN111037856A (en) * | 2019-12-24 | 2020-04-21 | 安徽鼎泓包装有限公司 | Double injection point conjoined bottle cap and mould |
| CN111745785A (en) * | 2020-07-03 | 2020-10-09 | 青岛理工大学 | Multi-station automatic hot-press casting device and working method |
| CN114770879B (en) * | 2022-06-22 | 2022-09-13 | 张家港市天江精密模具制造有限公司 | Plastic cover-shaped workpiece processing injection mold capable of rapidly preventing damage and demolding |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02264660A (en) * | 1989-04-04 | 1990-10-29 | Kooshin Kk | Nipple for nursing bottle and production thereof |
| CN2770934Y (en) * | 2005-03-29 | 2006-04-12 | 重庆工学院 | Injection mould capable of automatically removing needle-point gate condensed material |
| CN102019396A (en) * | 2009-09-14 | 2011-04-20 | 牟维军 | Ejection mechanism with movable sprue bush and pulling board |
| CN102653123A (en) * | 2012-05-07 | 2012-09-05 | 常州工学院 | Point pouring gate injection mould capable of automatically pushing out condensed materials |
| CN203004201U (en) * | 2012-11-25 | 2013-06-19 | 安徽工程大学 | Injection moulding die for medical EVA (ethylene vinyl-acetate) inner bottle cap |
-
2012
- 2012-11-25 CN CN201210481986.XA patent/CN103707455B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02264660A (en) * | 1989-04-04 | 1990-10-29 | Kooshin Kk | Nipple for nursing bottle and production thereof |
| CN2770934Y (en) * | 2005-03-29 | 2006-04-12 | 重庆工学院 | Injection mould capable of automatically removing needle-point gate condensed material |
| CN102019396A (en) * | 2009-09-14 | 2011-04-20 | 牟维军 | Ejection mechanism with movable sprue bush and pulling board |
| CN102653123A (en) * | 2012-05-07 | 2012-09-05 | 常州工学院 | Point pouring gate injection mould capable of automatically pushing out condensed materials |
| CN203004201U (en) * | 2012-11-25 | 2013-06-19 | 安徽工程大学 | Injection moulding die for medical EVA (ethylene vinyl-acetate) inner bottle cap |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103707455A (en) | 2014-04-09 |
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