CN112172015B - Injection molding machine with convertible cooling demoulding mechanism - Google Patents
Injection molding machine with convertible cooling demoulding mechanism Download PDFInfo
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- CN112172015B CN112172015B CN202010958497.3A CN202010958497A CN112172015B CN 112172015 B CN112172015 B CN 112172015B CN 202010958497 A CN202010958497 A CN 202010958497A CN 112172015 B CN112172015 B CN 112172015B
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- injection molding
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- forming die
- side direction
- molding machine
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- 238000001816 cooling Methods 0.000 title claims abstract description 40
- 238000001746 injection moulding Methods 0.000 title claims abstract description 35
- 230000007306 turnover Effects 0.000 claims abstract description 19
- 238000007664 blowing Methods 0.000 claims abstract description 11
- 238000007599 discharging Methods 0.000 claims abstract description 6
- 239000002994 raw material Substances 0.000 claims description 9
- 230000001105 regulatory effect Effects 0.000 claims description 7
- 238000009434 installation Methods 0.000 claims description 6
- 230000005540 biological transmission Effects 0.000 claims description 3
- 230000000694 effects Effects 0.000 claims 1
- 239000004033 plastic Substances 0.000 abstract description 8
- 229920003023 plastic Polymers 0.000 abstract description 8
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 230000005484 gravity Effects 0.000 abstract description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000007605 air drying Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000037081 physical activity Effects 0.000 description 1
- 229920001169 thermoplastic Polymers 0.000 description 1
- 229920001187 thermosetting polymer Polymers 0.000 description 1
Images
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
- B29C45/03—Injection moulding apparatus
-
- 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
-
- 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
- B29C45/1756—Handling of moulds or mould parts, e.g. mould exchanging means
-
- 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
- B29C45/40—Removing or ejecting moulded articles
- B29C45/4005—Ejector constructions; Ejector operating mechanisms
-
- 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
- B29C2045/1784—Component parts, details or accessories not otherwise provided for; Auxiliary operations not otherwise provided for
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
The invention relates to the technical field of injection molding equipment, in particular to an injection molding machine with a turnover type cooling demolding mechanism. According to the injection molding machine with the turnover type cooling demolding mechanism, the operation platform with the built-in turnover support adjusting plate is fixedly installed in the main frame body, the bottom cooling box with the transverse discharging box arranged in front is fixed below the operation platform, so that gravity discharging at the lower end of the mold is facilitated, injection molding at the upper end is not influenced, and the injection molding efficiency is greatly improved; the lateral driving motor is matched with the electromagnet to control the overturning and supporting adjusting plate to overturn and position, and the control and the adjustment are simple and convenient; the bottom cooling box can change its height as required, can change the cooling method of drawing of patterns as required, then cooperation side direction blowing mouth can be fast to putting down inside air-dry of forming die, avoids influencing the production and moulds plastics.
Description
Technical Field
The invention relates to the technical field of injection molding equipment, in particular to an injection molding machine with a turnover type cooling demolding mechanism.
Background
An injection molding machine is also known as an injection molding machine or an injection machine. It is a main forming equipment for making various shaped plastic products from thermoplastic plastics or thermosetting plastics by using plastic forming mould. The device is divided into a vertical type, a horizontal type and a full-electric type. The injection molding machine can heat the plastic, apply high pressure to the molten plastic, and inject it to fill the mold cavity.
Traditional injection molding machine simple structure, cooling drawing of patterns efficiency is not high, needs the manual work to shift out the product simultaneously after the product is accomplished, and the security is not high, troublesome poeration, production efficiency is low.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: in order to solve the problems existing in the prior art, the improved injection molding machine with the turnover type cooling demolding mechanism is provided, the problems that the traditional injection molding machine is simple in structure, the cooling demolding efficiency is not high, meanwhile, after a product is completed, the product needs to be manually moved out, the safety is not high, the operation is troublesome, and the production efficiency is low are solved.
The technical scheme adopted by the invention for solving the technical problems is as follows: an injection molding machine with a turnover type cooling and demolding mechanism comprises a main frame body, a top hydraulic elevator, a lateral driving motor, an electromagnet, an injection molding raw material supply pipe and an external air guide pipe externally connected with a high-pressure air delivery pipe, wherein an operation platform is fixedly arranged in the main frame body, an internal opening of a built-in turnover support adjusting plate is formed in the operation platform, an internal mounting opening of a built-in lower first forming die and a built-in lower second forming die is formed in the turnover support adjusting plate, lateral fixing supports of built-in locking bolts are fixedly connected to the periphery of the internal mounting opening on the upper surface and the lower surface of the turnover support adjusting plate, the top hydraulic elevator is fixedly arranged at the upper end of the main frame body through bolts, the lateral driving motor is fixed on the outer side surface of the main frame body through a lateral mounting frame, a height-adjustable bottom cooling box is movably arranged below the operation platform in the main frame body through a lateral rotating shaft, the inner side surface of the main frame body is fixedly arranged on two sides of the bottom cooling box and is provided with a lateral adjusting plate used for installing the bottom cooling box, and a longitudinal adjusting opening with a 7-shaped structure limiting clamping groove is formed in the inner side of the lateral adjusting plate.
Upset support regulating plate both sides fixedly connected with lateral adjustment stay tube, operation platform upper surface set up with lateral adjustment stay tube matched with arc assembly groove, body frame external wall on set up the side direction pilot hole that communicates with the arc assembly groove, upset support regulating plate insert the inside and body frame body activity assembly of side direction pilot hole through the lateral adjustment stay tube from the arc assembly groove, lateral adjustment stay tube outside end and lateral driving motor pivot on lie in the inside equal axial fixedly connected with intermeshing of lateral installation frame drive gear.
The main frame body is internally provided with an upper forming die which is controlled to lift by a top hydraulic elevator and is arranged above the turnover supporting and adjusting plate, and the lateral side of the lower first forming die and the lateral side of the lower second forming die are provided with lateral limiting holes matched with locking bolts.
The operation platform is fixed with a lateral blowing nozzle, a strip-shaped mounting opening for fixing the lateral blowing nozzle through a bolt is formed in the outer side of the inner opening of the operation platform, and the lateral blowing nozzle is communicated with an air outlet of an external air guide pipe through an external air guide hose.
The upper end of the outer side surface of the bottom cooling box is provided with a transverse discharging box which protrudes outwards.
And a feeding conduit matched with the injection molding raw material supply pipe is longitudinally fixed in the upper part forming die, and the feeding conduit is communicated with the injection molding raw material supply pipe through a flexible hose.
The opening directions of the lower first forming die and the lower second forming die are opposite.
And an elastic limiting overturning bracket controlled by an electromagnet is arranged at the opening position of the lower end of the inner opening on the lower surface of the operating platform.
The invention has the beneficial effects that:
(1) according to the injection molding machine with the turnover type cooling and demolding mechanism, the operating platform with the built-in turnover support adjusting plate is fixedly installed in the main frame body, the bottom cooling box with the transverse discharging box arranged in front is fixed below the operating platform, the turnover support adjusting plate is driven by the lateral driving motor to turn over to switch the lower first forming mold and the lower second forming mold to be matched with the upper forming mold, gravity stripping at the lower end of the mold is facilitated, injection molding at the upper end is not influenced, and the injection molding efficiency is greatly improved;
(2) the lateral driving motor is matched with the electromagnet to control the overturning and supporting adjusting plate to overturn and position, so that the control and adjustment are simple and convenient, and the positioning is accurate;
(3) inside the vertical adjustment mouth of bottom cooler bin through side direction pivot movable mounting body frame body, people can change its height as required, can change the cooling method of drawing of patterns as required, then the mouth of blowing of cooperation side direction can be fast to putting down inside air-drying of forming die, avoids influencing the production and moulds plastics.
Drawings
The invention is further illustrated with reference to the following figures and examples.
Fig. 1 is a schematic structural view of the present invention.
Fig. 2 is a top view of the operation platform of the present invention.
FIG. 3 is a schematic view of the bottom cooling tank of the present invention.
Detailed Description
The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic views illustrating only the basic structure of the present invention in a schematic manner, and thus show only the constitution related to the present invention.
Fig. 1 and 2 show an injection molding machine with convertible cooling demoulding mechanism, including the body frame 1, top hydraulic lift 2, side direction driving motor 3, electro-magnet 4, raw materials supply pipe 5 and the external outside guide duct 6 of external high-pressure air delivery pipe of moulding plastics, wherein side direction driving motor 3 and electro-magnet 4 are direct purchase in market, supply power through external power supply, utilize manual switch control to open and close, side direction driving motor 3 and electro-magnet 4 coordinated control.
Further, in order to cooperate with installation and cooling demoulding, an operation platform 7 is fixedly installed inside the main frame body 1, an internal opening with a built-in overturning support adjusting plate 8 is formed inside the operation platform 7, internal installing ports with a built-in lower first forming die 10 and a built-in lower second forming die 11 are formed inside the overturning support adjusting plate 8, no gap exists between the outer side surfaces of the lower first forming die 10 and the lower second forming die 11 and the inner side surface of the internal installing port, lateral fixing supports 12 with built-in locking bolts are fixedly connected to the peripheries of the upper surface and the lower surface of the overturning support adjusting plate 8 at the internal installing port, the top hydraulic lifter 2 is fixedly installed at the upper end of the main frame body 1 through bolts, the lateral driving motor 3 is fixed on the outer side surface of the main frame body 1 through a lateral installing frame, a height-adjustable bottom cooling box 13 is movably installed below the operation platform 7 inside the main frame body 1 through a lateral rotating shaft, lateral adjusting plates 14 for installing the bottom cooling box 13 are fixedly arranged on the two sides of the inner side surface of the main frame body 1, which are positioned at the bottom cooling box 13, longitudinal adjusting openings 16 with 7-shaped structure limiting clamping grooves 15 are formed in the lateral adjusting plates 14, and further, for convenience of installation and overturning adjustment, transverse adjusting support pipes 17 are fixedly connected to two sides of an overturning support adjusting plate 8, an arc-shaped assembling groove 18 matched with the transverse adjusting support pipes 17 is formed in the upper surface of an operating platform 7, a lateral assembling hole communicated with the arc-shaped assembling groove 18 is formed in the outer side wall of a main frame body 1, the overturning support adjusting plate 8 is inserted into the lateral assembling hole from the arc-shaped assembling groove 18 through the transverse adjusting support pipes 17 and movably assembled with the main frame body 1, and transmission gears 19 which are meshed with each other are axially fixedly connected inside the lateral installation frame on the outer side end of the transverse adjusting support pipe 17 and the rotating shaft of a lateral driving motor 3. The diameter of the gear at the outer end of the transverse adjusting support pipe 17 in the transmission gear 19 is far larger than that of the gear on the rotating shaft of the lateral driving motor 3.
Example (b): the lateral rotating shafts on the two sides of the bottom cooling box 13 are inserted into the limiting clamping grooves 15 from the longitudinal adjusting openings 16 to assemble the limiting.
Further, for the cooperation installation and fixed, the main frame body 1 is inside to be located the upset and to support 8 tops and be provided with the upper portion forming die 20 that goes up and down by top hydraulic lift 2 control, set up the spacing hole 21 of side direction with locking bolt matched with on the first forming die 10 of underslung and the second forming die 11 lateral surface of underslung, furthermore, air-dry for the cooperation high pressure, convenient loading and unloading, promote application scope, be fixed with side direction blowing nozzle 22 on operation platform 7, operation platform 7 is located the inside opening outside and offers the bar installing port 23 that is used for bolt fastening side direction blowing nozzle 22, side direction blowing nozzle 22 is linked together through outside air guide hose and outside guide duct 6 air outlet.
Further, in order to conveniently take the cooling product laterally, the upper end of the outer side surface of the bottom cooling box 13 is provided with a transverse material outlet box 24 protruding outwards, further, in order to match with top material injection, a feeding conduit 25 matched with the injection molding raw material supply pipe 5 is longitudinally fixed inside the upper forming mold 20, and the feeding conduit 25 is communicated with the injection molding raw material supply pipe 5 through a flexible hose.
Further, for convenience of use, the opening directions of the lower first forming die 10 and the lower second forming die 11 are opposite, and further, in order to match bottom positioning, an elastic limiting overturning bracket 26 controlled by the electromagnet 4 is installed at the position of the lower end opening of the inner opening on the lower surface of the operating platform 7. The elastic limiting overturning bracket 26 is composed of an overturning limiting plate movably assembled at the lower end of the operating platform 7 and an iron extrusion spring used for elastically connecting the electromagnet 4 with the overturning limiting plate, and is used for overturning the overturning limiting plate in a limiting way by starting the electromagnet 4 so as to avoid overturning the supporting and adjusting plate 8.
Example (b): when people control the side direction driving motor 3 to rotate, the overturning supporting adjusting plate 8 is driven to overturn, the overturning supporting adjusting plate 8 starts the electromagnet 4 to limit the overturning supporting adjusting plate 8 after the overturning for one circle, and the side direction driving motor 3 is closed at the same time, so that the number of turns of the side direction driving motor can be monitored through the rotating speed sensor.
According to the injection molding machine with the turnover type cooling demolding mechanism, the operating platform 7 with the built-in turnover support adjusting plate 8 is fixedly installed inside the main frame body 1, the bottom cooling box 13 with the transverse discharging box 24 arranged in front is fixed below the operating platform 7, the turnover support adjusting plate 8 is driven by the lateral driving motor 3 to turn over to switch the lower first forming mold and the lower second forming mold to be matched with the upper forming mold 20, gravity stripping of the lower end of the mold is facilitated, injection molding of the upper end is not influenced, and the injection molding efficiency is greatly improved; the lateral driving motor 3 is matched with the electromagnet 4 to control the overturning and supporting adjusting plate 8 to overturn and position, so that the control and adjustment are simple and convenient, and the positioning is accurate; inside bottom cooling box 13 passes through the longitudinal regulation mouth 16 of side direction pivot movable mounting body frame body 1, people can change its height as required, can change the cooling method of drawing of patterns as required, then cooperate the side direction to blow the mouth 22 and can be fast air-dry to putting down inside the forming die, avoid influencing the production and mould plastics.
In light of the foregoing description of the preferred embodiment of the present invention, many modifications and variations will be apparent to those skilled in the art without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.
Claims (4)
1. The utility model provides an injection molding machine with convertible cooling demoulding mechanism, includes the outside guide duct (6) of the body frame body (1), top hydraulic lift (2), side direction driving motor (3), electro-magnet (4), injection moulding raw materials supply pipe (5) and external high-pressure air delivery pipe, characterized by: the main frame body (1) is fixedly provided with an operating platform (7) inside, the operating platform (7) is internally provided with an internal opening of a built-in overturning supporting adjusting plate (8), the overturning supporting adjusting plate (8) is internally provided with an internal mounting port of a built-in lower first forming die (10) and a built-in second forming die (11), the upper surface and the lower surface of the overturning supporting adjusting plate (8) are positioned on the periphery of the internal mounting port and fixedly connected with a lateral fixing support (12) of a built-in locking bolt, a top hydraulic elevator (2) is fixedly arranged at the upper end of the main frame body (1) through bolts, a lateral driving motor (3) is fixed on the outer side surface of the main frame body (1) through a lateral mounting frame, a height-adjustable bottom cooling box (13) is movably arranged below the operating platform (7) inside the main frame body (1) through a lateral rotating shaft, the body frame (1) medial surface be located bottom cooling box (13) both sides fixed mounting and have side direction regulating plate (14) that are used for installing bottom cooling box (13), side direction regulating plate (14) inside longitudinal regulation mouth (16) that the inboard has 7 style of calligraphy structure spacing draw-in grooves (15) of seting up, upset support regulating plate (8) both sides fixedly connected with transverse adjustment stay tube (17), operation platform (7) upper surface set up with transverse adjustment stay tube (17) matched with arc assembly groove (18), body frame (1) lateral wall on set up the side direction pilot hole that is linked together with arc assembly groove (18), upset support regulating plate (8) insert side direction pilot hole inside and body frame (1) activity assembly from arc assembly groove (18) through transverse adjustment stay tube (17), transverse adjustment stay tube (17) outside end and side direction driving motor (3) pivot on be located side direction installation side direction mounting support regulating plate (14) The transmission gears (19) which are meshed with each other are axially and fixedly connected in the frame, an upper forming die (20) which is controlled to lift by a top hydraulic lifter (2) is arranged above the turnover supporting adjusting plate (8) in the main frame body (1), lateral limiting holes (21) matched with the locking bolts are formed in the outer lateral surfaces of the lower first forming die (10) and the lower second forming die (11), a lateral air blowing nozzle (22) is fixed on the operating platform (7), a strip-shaped mounting opening (23) for fixing the lateral air blowing nozzle (22) by a bolt is arranged on the operating platform (7) and positioned outside the inner opening, the lateral air blowing nozzle (22) is communicated with the air outlet of the external air guide pipe (6) through an external air guide hose, the upper end of the outer side surface of the bottom cooling box (13) is provided with a transverse discharging box (24) which protrudes outwards.
2. The injection molding machine with a flip-chip cooling demolding mechanism as claimed in claim 1, wherein: a feeding conduit (25) matched with the injection molding raw material supply pipe (5) is longitudinally fixed in the upper part forming die (20), and the feeding conduit (25) is communicated with the injection molding raw material supply pipe (5) through a flexible hose.
3. The injection molding machine with a flip-chip cooling demolding mechanism as claimed in claim 1, wherein: the opening directions of the lower first forming die (10) and the lower second forming die (11) are opposite.
4. The injection molding machine with a flip-chip cooling demolding mechanism as claimed in claim 1, wherein: and an elastic limiting overturning bracket (26) controlled by an electromagnet (4) is arranged at the opening position of the lower end of the inner opening on the lower surface of the operating platform (7).
Priority Applications (1)
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CN202010958497.3A CN112172015B (en) | 2020-09-14 | 2020-09-14 | Injection molding machine with convertible cooling demoulding mechanism |
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CN202010958497.3A CN112172015B (en) | 2020-09-14 | 2020-09-14 | Injection molding machine with convertible cooling demoulding mechanism |
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CN112172015B true CN112172015B (en) | 2022-04-08 |
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CN114102964B (en) * | 2021-10-26 | 2024-01-26 | 东台市强圣精密铸造有限公司 | Injection molding machine forming module with bottom lifting type guide mechanism |
CN114102967B (en) * | 2021-11-08 | 2023-12-26 | 东台市强圣精密铸造有限公司 | Rotary double-cavity forming equipment for injection molding machine |
CN114311263B (en) * | 2021-12-01 | 2023-08-08 | 安徽德全新型建材科技有限公司 | Quick drawing of patterns transfer device of cement homogeneity board |
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CN208305636U (en) * | 2018-03-30 | 2019-01-01 | 东莞市祺阜塑胶模具有限公司 | A reversing mold for plug injection molding |
CN108327206A (en) * | 2018-05-03 | 2018-07-27 | 合肥新生力塑胶科技有限公司 | A kind of equipment for injection molding |
CN108724662A (en) * | 2018-06-19 | 2018-11-02 | 毛静玲 | A kind of cooling device of plastic mould |
CN108819141A (en) * | 2018-08-07 | 2018-11-16 | 苏州优熠精密机械有限公司 | A kind of high efficient mobile phone casing stripper apparatus that demoulding cooling is fast |
CN208841688U (en) * | 2018-09-20 | 2019-05-10 | 重庆洪毅模塑有限公司 | A kind of injection molding machine of stable fast demoulding |
CN110355909A (en) * | 2019-08-30 | 2019-10-22 | 双一科技盐城有限公司 | The overturning localization method of blade mold overturning and positioning device and blade mold |
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Denomination of invention: An injection molding machine with a flipping cooling demolding mechanism Effective date of registration: 20230803 Granted publication date: 20220408 Pledgee: Bank of China Limited Dongtai Branch Pledgor: Dongtai Qiangsheng Precision Casting Co.,Ltd. Registration number: Y2023980050829 |
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