CN108274696A - A kind of Automated mould and its working method - Google Patents
A kind of Automated mould and its working method Download PDFInfo
- Publication number
- CN108274696A CN108274696A CN201711460501.8A CN201711460501A CN108274696A CN 108274696 A CN108274696 A CN 108274696A CN 201711460501 A CN201711460501 A CN 201711460501A CN 108274696 A CN108274696 A CN 108274696A
- Authority
- CN
- China
- Prior art keywords
- die holder
- control panel
- lower die
- pneumatic mechanism
- gas storehouse
- 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
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
- B29C45/26—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
- B29C45/72—Heating or cooling
- B29C45/73—Heating or cooling of the mould
- B29C45/7306—Control circuits 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
- B29C45/76—Measuring, controlling or regulating
- B29C45/768—Detecting defective moulding conditions
-
- 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
- B29C2945/00—Indexing scheme relating to injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould
- B29C2945/76—Measuring, controlling or regulating
- B29C2945/76003—Measured parameter
- B29C2945/7604—Temperature
- B29C2945/76043—Temperature derivative, change thereof
Abstract
The invention discloses a kind of Automated moulds, including：Upper die holder, lower die holder, cavity, gas storehouse, pneumatic mechanism, testing agency and control panel, it is provided with lower die holder below the upper die holder, it is provided with cavity between the upper die holder and lower die holder, it is provided with gas storehouse below the lower die holder, the lower die holder bottom is provided with pneumatic mechanism, and described pneumatic mechanism one end is fixed on upper die holder, and the lower die holder side is provided with fixed plate, the fixed plate side is provided with testing agency, and the fixed plate other side is provided with control panel；The invention also discloses a kind of working methods of Automated mould.It is completed open mold by using cylinder and has liberated manpower with mechanical force instead of manpower；Use mechanical detection mould inside so that invisible injection moulding process becomes high-visible originally, and worker is contributed to improve injection molding quality；Heating mechanism is increased, defective work is heated again in time, is cooling, the consumption of cost is reduced, improves production efficiency.
Description
Technical field
The invention belongs to injection-moulding device field, more particularly to a kind of Automated mould and its working method.
Background technology
External injection molding machine industry starting is more early, advanced injection molding machine the relevant technologies has been grasped, in large size plastic jetting-moulding device, special injection molding
Machine and precise injection machine have first-strike advantage.But the injection molding machine industry of China passes through development for many years, in precise injection machine control
Also great breakthrough is achieved in the R and D of system processed, whether in management level, product variety, technical merit, production
Product class and application new and high technology etc., the gap all between diminution and developed country.
As Germany proposes that industrial 4.0 national strategies and China market are continuous for injection molding machine product performance requirement first
It improves, the domestic manufacturing technical merit of injection molding machine is just continuously improved in autonomous innovation.But the need increasingly too high in face of market
The domestic and international competition of the same trade of summation, enterprise wants to show one's talent, it is necessary to control production cost, while improve product as far as possible
Quality.In the epoch that advanced cost of labor is more high, it is exactly automatic improving to reduce cost most efficient method, with machinery
Power replaces manpower；Simultaneously as the injection moulding process of injection molding machine is carried out in closed mould inside, naked eyes can not be used to note
Modeling state is observed, and manual operation is also often made a fault, and which results in a large amount of defective products, and by the strength of machinery
It can avoid these problems.Therefore, a that manpower is replaced with mechanical force, while the automation of internal injection moulding process can be monitored
Injection mold is very necessary.
Present mold, the main problems are as follows：
1, present mold mostly cannot be monitored the injection moulding process of mould inside, cannot monitor injection molding in real time
Journey cannot confirm substandard product in time, waste the production time, working efficiency is low, and manufactured product qualification rate is low.
2, present mold needs to mold mold closing by manpower mostly, and the operating time is long, while being easy to cause brokenly mold
It is bad, job schedule is influenced, production efficiency is reduced.
Invention content
Goal of the invention：In order to overcome the above deficiency, the object of the present invention is to provide a kind of Automated mould and its work sides
Method completes open mold by using the push-pull effort of cylinder, has achieved the purpose that replace manpower with mechanical force, liberated manpower；
Meanwhile using mechanical detection mould inside so that invisible injection moulding process becomes high-visible originally, and worker is contributed to carry
Height injection molding quality；Increase heating mechanism simultaneously, defective work found in time by testing agency, and in time to defective work again
Secondary heating, cooling, reduce the consumption of cost, while abandoning defective work in time, improve production efficiency.
Technical solution：To achieve the goals above, the present invention provides a kind of Automated moulds, including：Upper die holder, lower die
Seat, cavity, gas storehouse, pneumatic mechanism, testing agency and control panel, the upper die holder lower section are provided with lower die holder, the upper mold
It is arranged fluted between seat and lower die holder, is provided with cavity in the groove, gas storehouse is provided with below the lower die holder, under described
Die holder bottom surrounding is provided with extension edge, pneumatic mechanism is provided at the extension edge, under described pneumatic mechanism one end is fixed on
On die holder, the pneumatic mechanism other end is fixed on upper die holder, and the pneumatic mechanism connects gas storehouse, the lower die by gas circuit
Seat side is provided with the fixed plate of protrusion, and side of the fixed plate towards lower die holder is provided with testing agency, the fixed plate
Extraneous side is provided with control panel.
The setting of heretofore described mold is completed the process of open mold by using pneumatic mechanism, realized with machine
Tool power replaces the purpose of manpower, has liberated manpower；Mechanical force improves production compared to manpower strength bigger, more stable simultaneously
Efficiency, and reduce the possibility that accident occurs.
Heretofore described pneumatic mechanism is in the nature cylinder, and the cylinder block is fixed in by bolt on lower die holder,
The cylinder piston is pinned at by axis pin on upper die holder；Otic placode is provided on the upper die holder, the cylinder piston is pinned at
On otic placode.
The setting of heretofore described pneumatic mechanism, it uses dismountable fixed forms so that pneumatic mechanism can be with
It is still used after mold is scrapped, has saved production cost.
Heretofore described testing agency include for detect mold thermal energy variation infrared sensor and for examining
The ultrasonic sensor of mould inside moulding image is surveyed, the infrared sensor side is provided with ultrasonic sensor, institute
It states testing agency and control panel is connected by conducting wire.
The setting of heretofore described testing agency obtains heat distribution data so that work by infrared sensor
Personnel can recognize moulding cooling when stress distribution and whether block；It is noted by ultrasonic sensor
The concrete shape figure of plastic so that staff can understand whether moulding the negative characteristics such as bubble, crack, incompleteness occurs,
With timely processing whole production efficiency, while timely processing defective products are improved so as to shorten the production time of defective products
The corporate resource of defective products occupancy can be greatly reduced.
Display screen is provided on heretofore described control panel, the control panel is gentle by conducting wire connection gas storehouse
Motivation structure.
The setting of heretofore described control panel can allow staff to obtain the data that testing agency detects, together
When can control the movement of mold.
Heretofore described cavity outer surface setting is fluted, and heating mechanism, the heating are provided in the groove
Mechanism includes heating plate, connecting line, switch and power supply, and the heating plate is set in the groove of cavity outer surface, the heating
Piece quantity is more than one, is connected by connecting line between the heating plate, the heating plate is connected with switch and power supply, the switch
It is set on control panel, the power supply is set to gas storehouse side.
The setting of heretofore described heating mechanism uses electrically heated mode, provides for mold and heats again
Approach shortens the time of processing defective products, has saved the production time, improved life so as to directly reform defective products
Produce efficiency.
Heretofore described gas storehouse outer surface is provided with protection shell, passes through spring between the gas storehouse and protection shell
Connection.
The setting of heretofore described protection shell, the destruction that gas storehouse can be protected not collided, while gas storehouse and protection
Spring can play cushioning effect between shell, reduce the injury that gas storehouse is subject to.
Heretofore described gas storehouse is provided with the inflating port for supplementing compressed gas.
A kind of working method of heretofore described Automated mould, including automatic open-close mould, specifically include following step
Suddenly：Step 1：Molding, operating personnel open pneumatic mechanism vent valve by control panel, and pneumatic mechanism is slowly deflated, and mold closes
Mould；Step 2：Die sinking, operating personnel start gas storehouse by control panel, and gas storehouse inputs compressed gas, pneumatic motor to pneumatic mechanism
Structure is slowly lifted, mold open.
A kind of working method of heretofore described Automated mould, including detection moulding and adjustment moulding, tool
Body includes the following steps：Step 1：Injection moulding process detects in real time in testing agency, and detection data is passed on control panel；
Step 2：Operating personnel have found that moulding is unqualified by control panel, heating mechanism are opened by control panel, to moulding
It heats and softens, fill up injection molding fluid and cooling and shaping.
Above-mentioned technical proposal can be seen that the present invention and have the advantages that：
1, a kind of heretofore described Automated mould and its working method, the setting of heretofore described mold pass through
The process that open mold is completed using pneumatic mechanism is realized the purpose for being replaced manpower with mechanical force, has liberated manpower；Machinery simultaneously
Power improves the efficiency of production, and reduce the possibility that accident occurs compared to manpower strength bigger, more stable.
2, a kind of heretofore described Automated mould and its working method, the setting of pneumatic mechanism, having used can
The fixed form of dismounting so that pneumatic mechanism can remain unchanged after mold is scrapped and use, and save production cost.
3, a kind of heretofore described Automated mould and its working method pass through infrared sensor and obtain heat point
Cloth data so that staff can recognize moulding cooling when stress distribution and whether block；It passes through super
Sonic sensor obtain moulding concrete shape figure so that staff can understand moulding whether occur bubble, crack,
The negative characteristics such as incompleteness improve whole production efficiency, together with timely processing so as to shorten the production time of defective products
When timely processing defective products can greatly reduce defective products occupancy corporate resource.
4, a kind of heretofore described Automated mould and its working method, use electrically heated mode, are mold
The approach heated again is provided, so as to directly reform defective products, the time of processing defective products is shortened, has saved life
The time is produced, production efficiency is improved.
Description of the drawings
Fig. 1 is the overall structure diagram of the present invention；
In figure：Upper die holder -1, cavity -3, gas storehouse -4, pneumatic mechanism -5, testing agency -6, control panel -7, adds lower die holder -2
Heat engine structure -8, protection shell -9.
Specific implementation mode
In the following with reference to the drawings and specific embodiments, the present invention is furture elucidated.
Embodiment 1
A kind of Automated mould as shown in Figure 1, including：Upper die holder 1, lower die holder 2, cavity 3, gas storehouse 4, pneumatic mechanism 5, detection
Mechanism 6 and control panel 7,1 lower section of the upper die holder are provided with lower die holder 2, are provided between the upper die holder 1 and lower die holder 2
Groove, cavity 3 is provided in the groove, and 2 lower section of the lower die holder is provided with gas storehouse 4,2 bottom surrounding setting of the lower die holder
There is extension edge, pneumatic mechanism 5 is provided at the extension edge, 5 one end of the pneumatic mechanism is fixed on lower die holder 2, the gas
5 other end of motivation structure is fixed on upper die holder 1, and the pneumatic mechanism 5 connects gas storehouse 4 by gas circuit, and 2 side of the lower die holder is set
It is equipped with the fixed plate of protrusion, side of the fixed plate towards lower die holder 2 is provided with testing agency 6, and the fixed plate faces out
The side on boundary is provided with control panel 7.
Pneumatic mechanism 5 described in the present embodiment is in the nature cylinder, and the cylinder block is fixed in lower die holder 2 by bolt
On, the cylinder piston is pinned at by axis pin on upper die holder 1；Otic placode, the cylinder piston pin are provided on the upper die holder
It is connected on otic placode.
Testing agency 6 described in the present embodiment includes for detecting the infrared sensor and be used for that mold thermal energy changes
The ultrasonic sensor of mould inside moulding image is detected, the infrared sensor side is provided with ultrasonic sensor,
The testing agency 6 connects control panel 7 by conducting wire.
Display screen is provided on control panel 7 described in the present embodiment, the control panel 7 connects gas storehouse by conducting wire
4 and pneumatic mechanism 5.
3 outer surface of cavity setting described in the present embodiment is fluted, and heating mechanism 8 is provided in the groove, described
Heating mechanism includes heating plate, connecting line, switch and power supply, and the heating plate is set in the groove of 3 outer surface of cavity, described
Heating plate quantity is more than one, is connected by connecting line between the heating plate, the heating plate is connected with switch and power supply, described
Switch is set on control panel 7, and the power supply is set to 4 side of gas storehouse.
4 outer surface of gas storehouse described in the present embodiment is provided with protection shell 9, leads between the gas storehouse 4 and protection shell 9
Cross spring connection.
Gas storehouse 4 described in the present embodiment is provided with the inflating port for supplementing compressed gas.
A kind of working method of Automated mould described in the present embodiment, including automatic open-close mould, specifically include following
Step：Step 1：Molding, operating personnel open 5 vent valve of pneumatic mechanism by control panel 7, and pneumatic mechanism 5 is slowly deflated,
Mold clamping；Step 2：Die sinking, operating personnel start gas storehouse 4 by control panel 7, and gas storehouse 4 is inputted to pneumatic mechanism 5 to be compressed
Gas, pneumatic mechanism 5 are slowly lifted, mold open.
A kind of working method of Automated mould described in the present embodiment, including detection moulding and adjustment moulding,
Specifically include following steps：Step 1：Injection moulding process detects in real time in testing agency 6, and detection data is passed to control panel 7
On；Step 2：Operating personnel have found that moulding is unqualified by control panel 7, and heating mechanism 8 is opened by control panel 7, right
Moulding heats and softens, fills up injection molding fluid and cooling and shaping.
Embodiment 2
A kind of Automated mould as shown in Figure 1, including：Upper die holder 1, lower die holder 2, cavity 3, gas storehouse 4, pneumatic mechanism 5, detection
Mechanism 6 and control panel 7,1 lower section of the upper die holder are provided with lower die holder 2, are provided between the upper die holder 1 and lower die holder 2
Groove, cavity 3 is provided in the groove, and 2 lower section of the lower die holder is provided with gas storehouse 4,2 bottom surrounding setting of the lower die holder
There is extension edge, pneumatic mechanism 5 is provided at the extension edge, 5 one end of the pneumatic mechanism is fixed on lower die holder 2, the gas
5 other end of motivation structure is fixed on upper die holder 1, and the pneumatic mechanism 5 connects gas storehouse 4 by gas circuit, and 2 side of the lower die holder is set
It is equipped with the fixed plate of protrusion, side of the fixed plate towards lower die holder 2 is provided with testing agency 6, and the fixed plate faces out
The side on boundary is provided with control panel 7.
Testing agency 6 described in the present embodiment includes for detecting the infrared sensor and be used for that mold thermal energy changes
The ultrasonic sensor of mould inside moulding image is detected, the infrared sensor side is provided with ultrasonic sensor,
The testing agency 6 connects control panel 7 by conducting wire.
3 outer surface of cavity setting described in the present embodiment is fluted, and heating mechanism 8 is provided in the groove, described
Heating mechanism includes heating plate, connecting line, switch and power supply, and the heating plate is set in the groove of 3 outer surface of cavity, described
Heating plate quantity is more than one, is connected by connecting line between the heating plate, the heating plate is connected with switch and power supply, described
Switch is set on control panel 7, and the power supply is set to 4 side of gas storehouse.
The above is only a preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, without departing from the principle of the present invention, several improvement can also be made, these improvement also should be regarded as the present invention's
Protection domain.
Claims (9)
1. a kind of Automated mould, it is characterised in that：Including：Upper die holder（1）, lower die holder（2）, cavity（3）, gas storehouse（4）, it is pneumatic
Mechanism（5）, testing agency（6）And control panel（7）, the upper die holder（1）Lower section is provided with lower die holder（2）, the upper die holder
（1）And lower die holder（2）Between be arranged fluted, be provided with cavity in the groove（3）, the lower die holder（2）Lower section is provided with
Gas storehouse（4）, the lower die holder（2）Bottom surrounding is provided with extension edge, and pneumatic mechanism is provided at the extension edge（5）, described
Pneumatic mechanism（5）Lower die holder is fixed in one end（2）On, the pneumatic mechanism（5）The other end is fixed on upper die holder（1）On, it is described
Pneumatic mechanism（5）Gas storehouse is connected by gas circuit（4）, the lower die holder（2）Side is provided with the fixed plate of protrusion, the fixed plate
Towards lower die holder（2）Side be provided with testing agency（6）, side of the fixed plate towards the external world is provided with control panel
（7）.
2. a kind of Automated mould according to claim 1, it is characterised in that：The pneumatic mechanism（5）It is in the nature gas
Cylinder, the cylinder block are fixed in lower die holder by bolt（2）On, the cylinder piston is pinned at upper die holder by axis pin（1）
On；Otic placode is provided on the upper die holder, the cylinder piston is pinned on otic placode.
3. a kind of Automated mould according to claim 1, it is characterised in that：The testing agency（6）Including being used for
The infrared sensor of mold thermal energy variation and the ultrasonic sensor for detecting mould inside moulding image are detected, it is described
Infrared sensor side is provided with ultrasonic sensor, the testing agency（6）Control panel is connected by conducting wire（7）.
4. a kind of Automated mould according to claim 1, it is characterised in that：The control panel（7）On be provided with
Display screen, the control panel（7）Gas storehouse is connected by conducting wire（4）And pneumatic mechanism（5）.
5. a kind of Automated mould according to claim 1, it is characterised in that：The cavity（3）Outer surface is provided with
Groove is provided with heating mechanism in the groove（8）, the heating mechanism includes heating plate, connecting line, switch and power supply, institute
It states heating plate and is set to cavity（3）In the groove of outer surface, the heating plate quantity is more than one, passes through company between the heating plate
Wiring connects, and the heating plate is connected with switch and power supply, and the switch is set to control panel（7）On, the power supply setting
In gas storehouse（4）Side.
6. a kind of Automated mould according to claim 1, it is characterised in that：The gas storehouse（4）Outer surface is provided with
Protect shell（9）, the gas storehouse（4）With protection shell（9）Between connected by spring.
7. a kind of Automated mould according to claim 1, it is characterised in that：The gas storehouse（4）It is provided with for mending
Fill the inflating port of compressed gas.
8. a kind of working method of Automated mould according to claim 1, including automatic open-close mould, it is characterised in that：
Specifically include following steps：
Step 1：Molding, operating personnel pass through control panel（7）Open pneumatic mechanism（5）Vent valve, pneumatic mechanism（5）Slowly
It deflates, mold clamping；
Step 2：Die sinking, operating personnel pass through control panel（7）Start gas storehouse（4）, gas storehouse（4）To pneumatic mechanism（5）Input pressure
Contracting gas, pneumatic mechanism（5）Slowly lifting, mold open.
9. a kind of working method of Automated mould according to claim 5, including detection moulding and adjustment moulding,
It is characterized in that：Specifically include following steps：
Step 1：Testing agency（6）Detection injection moulding process in real time, and detection data is passed into control panel（7）On；
Step 2：Operating personnel pass through control panel（7）It was found that moulding is unqualified, pass through control panel（7）Open heater
Structure（8）, moulding is heated and softened, fills up injection molding fluid and cooling and shaping.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711460501.8A CN108274696A (en) | 2017-12-28 | 2017-12-28 | A kind of Automated mould and its working method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711460501.8A CN108274696A (en) | 2017-12-28 | 2017-12-28 | A kind of Automated mould and its working method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108274696A true CN108274696A (en) | 2018-07-13 |
Family
ID=62802573
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711460501.8A Pending CN108274696A (en) | 2017-12-28 | 2017-12-28 | A kind of Automated mould and its working method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108274696A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114071288A (en) * | 2020-08-03 | 2022-02-18 | 昆山康龙电子科技有限公司 | Earplug with pressure regulating chamber and forming method thereof |
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| CN1685229A (en) * | 2002-07-30 | 2005-10-19 | 希帕视觉有限公司 | Analytical system and method for measuring and controlling glass product production process |
| CN101830047A (en) * | 2010-06-01 | 2010-09-15 | 杭州恒达化工机械厂 | Mechanical-electrical integrated mould capable of adjusting temperature |
| CN202399485U (en) * | 2011-09-30 | 2012-08-29 | 东华机械有限公司 | Die closing thimble structure for plastic forming machine |
| CN105537277A (en) * | 2015-12-14 | 2016-05-04 | 安徽楚江特钢有限公司 | Method for changing supporting rolls of rolling mill |
| CN205496551U (en) * | 2016-03-29 | 2016-08-24 | 南京优耐特精密机械制造有限公司 | Mould is from device |
| CN105965838A (en) * | 2016-06-22 | 2016-09-28 | 黄石鸿迪塑料模具有限公司 | Hot-melting lifting mechanism for sectional material mould |
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2017
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Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08336872A (en) * | 1995-06-09 | 1996-12-24 | Ube Ind Ltd | Method and apparatus for discriminating acceptable product of injection compression molding |
| CN1685229A (en) * | 2002-07-30 | 2005-10-19 | 希帕视觉有限公司 | Analytical system and method for measuring and controlling glass product production process |
| CN101830047A (en) * | 2010-06-01 | 2010-09-15 | 杭州恒达化工机械厂 | Mechanical-electrical integrated mould capable of adjusting temperature |
| CN202399485U (en) * | 2011-09-30 | 2012-08-29 | 东华机械有限公司 | Die closing thimble structure for plastic forming machine |
| CN105537277A (en) * | 2015-12-14 | 2016-05-04 | 安徽楚江特钢有限公司 | Method for changing supporting rolls of rolling mill |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114071288A (en) * | 2020-08-03 | 2022-02-18 | 昆山康龙电子科技有限公司 | Earplug with pressure regulating chamber and forming method thereof |
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