CN110653995A - Loading and unloading device for processing of vertical injection molding machine - Google Patents
Loading and unloading device for processing of vertical injection molding machine Download PDFInfo
- Publication number
- CN110653995A CN110653995A CN201910879261.8A CN201910879261A CN110653995A CN 110653995 A CN110653995 A CN 110653995A CN 201910879261 A CN201910879261 A CN 201910879261A CN 110653995 A CN110653995 A CN 110653995A
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- China
- Prior art keywords
- fixed
- block
- injection molding
- diaphragm
- molding machine
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- 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.)
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Classifications
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- 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
- B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
- B29C45/14008—Inserting articles into 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
- B29C45/40—Removing or ejecting moulded articles
- B29C45/42—Removing or ejecting moulded articles using means movable from outside the mould between mould parts, e.g. robots
Abstract
The invention discloses a feeding and discharging device for processing of a vertical injection molding machine, which comprises a feeding and discharging assembly and a lifting transmission assembly, wherein a supporting transverse plate is arranged below the feeding and discharging assembly, a clamping fixing piece is arranged at the top of the supporting transverse plate, a lifting connecting support is fixed at the bottom of the supporting transverse plate, and the feeding and discharging assembly is movably connected with the supporting transverse plate through the clamping fixing piece.
Description
Technical Field
The invention relates to the technical field of auxiliary equipment of vertical injection molding machines, in particular to a feeding and discharging device for processing of a vertical injection molding machine.
Background
In the prior art, for some vertical injection molding machines needing to implant small hardware in advance, the mode of manual feeding is adopted, the small hardware is placed in a station of a mold one by one when the mold is opened, then the mold is closed and injection molding is carried out, the workpieces are taken out from the mold one by one after the products are processed and formed, the automation degree is low, the production efficiency is low, and industrial injuries are easily caused due to improper operation of workers, and according to the bridge type automatic feeding and discharging mechanical arm of the vertical injection molding machine disclosed by the patent number CN201720096738.1, the whole feeding and discharging process is realized by a machine, the full-automatic degree is high, manual operation is not needed, the production efficiency is improved, and the condition that the workers are injured due to improper operation is avoided.
However, the installation of this manipulator and injection molding machine is comparatively fixed, and its manipulator wholly does not possess the function of lift adjustment for this manipulator dismouting is inconvenient, when the injection molding machine trouble damaged, inconvenient and the reuse of manipulator, and influence the normal processing use of injection molding machine again when manipulator trouble maintenance, and because its whole can not go up and down, make its injection molding machine model relatively fixed to the use, very big restriction its suitability of using, for this reason, we propose a last unloader of vertical injection molding machine processing usefulness.
Disclosure of Invention
The invention aims to provide a loading and unloading device for processing of a vertical injection molding machine, which aims to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: a feeding and discharging device for processing a vertical injection molding machine comprises a feeding and discharging assembly and a lifting transmission assembly, wherein the feeding and discharging assembly is used for automatic feeding of small hardware parts and automatic discharging of finished injection molding parts, the transmission assembly is used for transmission and collection of the finished injection molding parts after being taken out, a supporting transverse plate is arranged below the feeding and discharging assembly, a clamping fixing piece is arranged at the top of the supporting transverse plate and used for mounting and fixing the feeding and discharging assembly, so that the feeding and discharging assembly can be conveniently and directly replaced after being damaged and fails, the use convenience is ensured, a lifting connecting support is fixed at the bottom of the supporting transverse plate and used for lifting and adjusting the feeding and discharging assembly, the use applicability of the feeding and discharging assembly is improved, the feeding and discharging assembly can be used for feeding and discharging injection molding machines of various types, the feeding and discharging assembly is movably connected with the supporting transverse plate through the clamping fixing piece, and the, and install first location supporting component on the lift transmission subassembly, through first location supporting component, then support fixed stability when being used for improving the whole use of device to the last unloading of guaranteeing to mould plastics is used.
Preferably, first location supporting component includes two stiffeners, two the stiffener is fixed respectively in lift transmission subassembly both sides, and two the stiffener top all is equipped with the even board of lift, even screw thread runs through has drive screw in the board of lift, the drive screw bottom all rotates with the board of lift even through the bearing respectively and is connected, even board both ends bottom of lift all is fixed with the location bracing piece, the location bracing piece all slides and runs through the stiffener, and the location bracing piece bottom all is fixed with first support kicking block.
Preferably, the lift linking bridge includes fixed diaphragm, fixed diaphragm one end and lift transmission subassembly welded fastening, and fixed diaphragm both sides equidistance run through be fixed with a plurality of support posts, the one end below that lift transmission subassembly was kept away from to fixed diaphragm is equipped with second location supporting component, and fixed diaphragm top fixed mounting has the pneumatic cylinder, second location supporting component is fixed with the support post, the pneumatic cylinder output is fixed with the support diaphragm, and the pneumatic cylinder both sides are equipped with the direction telescopic link respectively, the direction telescopic link both ends are equallyd divide and are do not fixed with fixed diaphragm and support diaphragm.
Preferably, the second positioning and supporting assembly comprises a fixed plate, two ends of the fixed plate are respectively fixed to the supporting columns, a lifting screw penetrates through the inner thread of the fixed plate, and a second supporting top block is fixed to the bottom end of the lifting screw.
Preferably, the top ends of the driving screw and the lifting screw are respectively and fixedly provided with a first hand wheel and a second hand wheel.
Preferably, the block fixing part comprises a block seat, the block seat is fixed at the top of the supporting transverse plate, a block groove is formed in the top of the block seat, a block convex block is fixed at the bottom of the feeding and discharging assembly, the block convex block is clamped with the block groove, a bayonet lock penetrates through the block seat in a sliding mode, a limiting plate is fixed at one end, located outside the block seat, of the bayonet lock, an extension spring is arranged outside the bayonet lock, and two ends of the extension spring are fixedly connected with the limiting plate and the block seat respectively.
Preferably, one side that the block seat was kept away from to the limiting plate is equipped with the anticreep roof, anticreep roof fixed mounting is at supporting diaphragm top, the bayonet lock is fixed to run through the limiting plate, and the bayonet lock slides and runs through the anticreep roof.
Preferably, one side of the anti-falling top plate, which is far away from the clamping seat, is provided with a pull ring, and the pull ring is fixedly connected with one end, which is far away from the clamping seat, of the bayonet lock.
Compared with the prior art, the invention has the beneficial effects that:
1. the automatic feeding and discharging device is different from the prior art, the feeding and discharging assembly and the lifting transmission assembly are fixedly arranged to be separated from an injection molding machine, so that the recycling capability and the convenience of the feeding and discharging assembly are improved, meanwhile, the whole feeding and discharging assembly can be lifted and adjusted, so that the feeding and discharging device can be used for feeding and discharging injection molding machines of various types well and automatically, the use applicability of the feeding and discharging assembly is greatly improved, and the automatic feeding and discharging device is convenient and practical.
2. According to the invention, in the process of recycling the feeding and discharging components, auxiliary positioning support can be carried out, so that the stability of the device in use of feeding and discharging in integral injection molding is effectively improved, meanwhile, the feeding and discharging components can be conveniently disassembled and fixed, and can be conveniently and directly replaced when the feeding and discharging components are in failure, thereby avoiding influencing the use of the injection molding machine in normal injection molding processing.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a side view of a partial structure of the present invention;
FIG. 3 is a schematic top view of the fixed cross plate of the present invention;
FIG. 4 is a side view of a partial structure of the connecting bracket of the present invention;
FIG. 5 is an enlarged partial sectional view of the present invention;
FIG. 6 is an enlarged view of the region A of the present invention.
In the figure: 1-a loading and unloading assembly; 2-a lifting transmission assembly; 3-supporting the transverse plate; 4-clamping the fixing piece; 5-lifting the connecting bracket; 6-a first positioning support assembly; 7-a reinforcing rod; 8-lifting connecting plates; 9-driving the screw; 10-positioning the supporting rod; 11-a first supporting top block; 12-fixing the transverse plate; 13-supporting the upright; 14-a second positioning support assembly; 15-hydraulic cylinders; 16-guiding the telescopic rod; 17-fixing the plate; 18-a lifting screw; 19-a second supporting top block; 20-a first hand wheel; 21-a second hand wheel; 22-a clamping seat; 23-a snap groove; 24-a snap-fit projection; 25-bayonet lock; 26-a limiting plate; 27-an extension spring; 28-anti-drop top plate; 29-pull ring.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-6, the present invention provides a technical solution: a feeding and discharging device for processing of a vertical injection molding machine comprises a feeding and discharging assembly 1 and a lifting transmission assembly 2, wherein the feeding and discharging assembly 1 is used for automatic feeding of small hardware parts and automatic discharging of finished injection molding parts, the lifting transmission assembly 2 is used for transmission and collection of the finished injection molding parts after being taken out, a supporting transverse plate 3 is arranged below the feeding and discharging assembly 1, a clamping fixing part 4 is arranged at the top of the supporting transverse plate 3, the clamping fixing part 4 is used for installation and fixation of the feeding and discharging assembly 1, so that the feeding and discharging assembly can be conveniently and directly replaced after being damaged and failed, the use convenience is ensured, a lifting connecting support 5 is fixed at the bottom of the supporting transverse plate 3 and used for lifting adjustment of the feeding and discharging assembly 1, the use applicability of the feeding and discharging of injection molding machines of various types is improved, the feeding and discharging assembly 1 is movably connected with the supporting transverse plate 3 through the clamping, lifting transmission assembly 2 and 5 one end welded fastening of lift linking bridge, and install first location supporting component 6 on the lifting transmission assembly 2, through first location supporting component 6, then support fixed stability when being used for improving the whole use of device to the last unloading of guaranteeing to mould plastics is used.
The first positioning support component 6 comprises two reinforcing rods 7, the two reinforcing rods 7 are respectively fixed at two sides of the lifting transmission component 2, and a lifting connecting plate 8 is arranged above the two reinforcing rods 7, a driving screw 9 is threaded through the lifting connecting plate 8, the bottom ends of the driving screws 9 are respectively and rotatably connected with a lifting connecting plate 8 through bearings, the bottoms of the two ends of the lifting connecting plate 8 are respectively fixed with a positioning support rod 10, the positioning support rods 10 are all slidably penetrated through the reinforcing rods 7, the bottom ends of the positioning support rods 10 are all fixed with first support top blocks 11, the first positioning and supporting component 6 is used for improving the stability of supporting and fixing when the whole device is used, thereby guarantee to stabilize the last unloading use of moulding plastics, through first location supporting component 6, then support fixed stability when being used for improving the device is whole to the last unloading of guaranteeing to stabilize moulding plastics is used.
The lifting connecting bracket 5 comprises a fixed transverse plate 12, one end of the fixed transverse plate 12 is welded and fixed with the lifting transmission assembly 2, a plurality of supporting upright posts 13 are equidistantly arranged and fixedly penetrated at two sides of the fixed transverse plate 12, a second positioning and supporting assembly 14 is arranged below one end, far away from the lifting transmission assembly 2, of the fixed transverse plate 12, a hydraulic cylinder 15 is fixedly arranged at the top of the fixed transverse plate 12, the second positioning and supporting assembly 14 is fixed with the supporting upright posts 13, the output end of the hydraulic cylinder 15 is fixed with a supporting transverse plate 3, guiding telescopic rods 16 are respectively arranged at two sides of the hydraulic cylinder 15, two ends of each guiding telescopic rod 16 are respectively fixed with the fixed transverse plate 12 and the supporting transverse plate 3, the lifting adjustment of the feeding and discharging assembly 1 can be carried out through the lifting connecting bracket 5, the applicability of the use of the lifting connecting bracket is improved, the feeding and discharging, can go up and down to go up unloading subassembly 1 and adjust to improve its suitability that uses, can go up to unloading to the injection molding machine of multiple model and use.
When using to different model injection molding machines, support diaphragm 3 through setting up 15 work drive of pneumatic cylinder and go up and down to guarantee stability through 16 direction of direction telescopic link simultaneously, thereby go up and down to going up unloading subassembly 1, use with the injection molding machine of cooperation different models goes on fine unloading of going up and down.
The second positioning and supporting assembly 14 comprises a fixing plate 17, two ends of the fixing plate 17 are respectively fixed with the supporting upright columns 13, a lifting screw 18 penetrates through the inner thread of the fixing plate 17, a second supporting top block 19 is fixed at the bottom end of the lifting screw 18, and the overall stability of the second positioning and supporting assembly 14 is further improved.
The top ends of the driving screw 9 and the lifting screw 18 are respectively and fixedly provided with a first hand wheel 20 and a second hand wheel 21, so that the convenience of the integral supporting and positioning of the device is improved.
When supporting the location, rotatory first hand wheel 20 and second hand wheel 21 respectively, in order to order about drive screw 9 and lifting screw 18 respectively rotatory, its drive screw 9 orders about the lift even board 8 when rotatory and goes up and down, in order to drive the lifting support pole 10 and go up and down, thereby with first kicking block 11 decline and ground contact of supporting, and lifting screw 18 is rotatory then order about its self spiral and go up and down, when lifting screw 18 goes up and down by oneself, order about the second and support kicking block 19 decline and ground contact, thereby support kicking block 19 through first kicking block 11 and second, in order to wholly carry out stable location support to the device, guarantee stable use.
One side that the block seat 22 was kept away from to limiting plate 26 is equipped with anticreep roof 28, anticreep roof 28 fixed mounting is at supporting diaphragm 3 top, limiting plate 26 is run through to bayonet lock 25 is fixed, and bayonet lock 25 slides and runs through anticreep roof 28, has then restricted bayonet lock 25's displacement, can prevent effectively that bayonet lock 25 and block seat 22 from breaking away from, avoids bringing unnecessary troublesome for the use.
One side of the anti-falling top plate 28, which is far away from the clamping seat 22, is provided with a pull ring 29, the pull ring 29 is fixedly connected with one end of the bayonet 25, which is far away from the clamping seat 22, and the bayonet 25 is conveniently assembled and disassembled through the pull ring 29.
When unloading subassembly 1, at first pulling pull ring 29 drives bayonet lock 25 and removes, and order about extension spring 27 simultaneously and stretch, when bayonet lock 25 removed, its cancellation and the block of block lug 24, unloading subassembly 1 will be gone up and taken out this moment, can accomplish the dismantlement, the same reason during the installation, pulling pull ring 29 orders about bayonet lock 25 and removes, then aim at the block recess 23 at block seat 22 top with the block lug 24 of unloading subassembly 1 bottom and insert, loosen pull ring 29 after inserting, limiting plate 26 is drawn the spring action of extension spring 27 and is reset, thereby order about bayonet lock 25 to reset and block lug 24 block, carry out spacing fixed to it, thereby use the stable installation of unloading subassembly 1.
When the injection molding machine is damaged due to faults, the supporting and positioning of the first positioning supporting component 6 and the second positioning supporting component 14 are cancelled, the feeding and discharging component 1 and the lifting transmission component 2 are separated from the injection molding machine, the feeding and discharging component 1 and the lifting transmission component 2 are moved to one side of a new injection molding machine, the feeding and discharging component 1 can be conveniently disassembled and replaced by a new one by arranging the lifting transmission component 2 and the lifting connecting bracket 5 according to the actual size model of the injection molding machine, so that the injection molding machine can be rapidly put into injection molding production and use, the influence on normal production, processing and use is avoided, the injection molding machine is different from the prior art, and the injection molding machine can be used for injection molding machines of various models while the recycling capability and convenience of the injection molding machine are realized, can both carry out fine automation and go up the unloading and use, very big improvement its suitability that uses, convenient and practical.
According to the invention, the hydraulic cylinder 15 is preferably of a MOB-63 model, the circuit operation is the conventional circuit, and the circuits and control related to the invention are the prior art and are not described in detail herein.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (8)
1. The utility model provides a last unloader of vertical injection molding machine processing usefulness, includes last unloading subassembly (1) and lift transmission subassembly (2), its characterized in that: go up unloading subassembly (1) below and be equipped with support diaphragm (3), support diaphragm (3) top and install block mounting (4), and support diaphragm (3) bottom and be fixed with lift linking bridge (5), go up unloading subassembly (1) through block mounting (4) and support diaphragm (3) swing joint, lift transmission subassembly (2) and lift linking bridge (5) one end welded fastening, and install first location supporting component (6) on lift transmission subassembly (2).
2. The loading and unloading device for processing of the vertical injection molding machine as claimed in claim 1, wherein: first location supporting component (6) are including two stiffener (7), two stiffener (7) are fixed respectively in lift transmission subassembly (2) both sides, and two stiffener (7) top all is equipped with lift even board (8), it has drive screw (9) to run through to equal screw thread in lift even board (8), drive screw (9) bottom all rotates with lift even board (8) respectively through the bearing and is connected, lift even board (8) both ends bottom all is fixed with location bracing piece (10), location bracing piece (10) all slides and runs through stiffener (7), and location bracing piece (10) bottom all is fixed with first support kicking block (11).
3. The loading and unloading device for processing of the vertical injection molding machine as claimed in claim 2, wherein: lifting connection support (5) are including fixed diaphragm (12), fixed diaphragm (12) one end and lift transmission subassembly (2) welded fastening, and fixed diaphragm (12) both sides equidistance runs through and is fixed with a plurality of support post (13), the one end below that lift transmission subassembly (2) were kept away from in fixed diaphragm (12) is equipped with second location supporting component (14), and fixed diaphragm (12) top fixed mounting has pneumatic cylinder (15), second location supporting component (14) are fixed with support post (13), pneumatic cylinder (15) output is fixed with support diaphragm (3), and pneumatic cylinder (15) both sides are equipped with direction telescopic link (16) respectively, direction telescopic link (16) both ends are equallyd divide and do not fix with fixed diaphragm (12) and support diaphragm (3).
4. The loading and unloading device for processing of the vertical injection molding machine as claimed in claim 3, wherein: the second positioning and supporting assembly (14) comprises a fixing plate (17), two ends of the fixing plate (17) are fixed to the supporting upright posts (13) respectively, a lifting screw (18) penetrates through the inner thread of the fixing plate (17), and a second supporting ejector block (19) is fixed to the bottom end of the lifting screw (18).
5. The loading and unloading device for processing of the vertical injection molding machine as claimed in claim 4, wherein: and the top ends of the driving screw rod (9) and the lifting screw rod (18) are respectively and fixedly provided with a first hand wheel (20) and a second hand wheel (21).
6. The loading and unloading device for processing of the vertical injection molding machine as claimed in claim 5, wherein: block mounting (4) are including block seat (22), block seat (22) are fixed and are being supported diaphragm (3) top, and block seat (22) top seted up block recess (23), go up unloading subassembly (1) bottom and be fixed with block lug (24), block lug (24) and block recess (23) block, it has bayonet lock (25) to slide to run through in block seat (22), one end that bayonet lock (25) are located block seat (22) outside is fixed with limiting plate (26), and the bayonet lock (25) outside is equipped with extension spring (27), extension spring (27) both ends respectively with limiting plate (26) and block seat (22) fixed connection.
7. The loading and unloading device for processing of the vertical injection molding machine as claimed in claim 6, wherein: one side that block seat (22) was kept away from in limiting plate (26) is equipped with anticreep roof (28), anticreep roof (28) fixed mounting is at support diaphragm (3) top, limiting plate (26) are fixed to run through in bayonet lock (25), and bayonet lock (25) slide and run through anticreep roof (28).
8. The loading and unloading device for processing of the vertical injection molding machine as claimed in claim 7, wherein: one side of the anti-falling top plate (28) far away from the clamping seat (22) is provided with a pull ring (29), and the pull ring (29) is fixedly connected with one end of the bayonet pin (25) far away from the clamping seat (22).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910879261.8A CN110653995A (en) | 2019-09-18 | 2019-09-18 | Loading and unloading device for processing of vertical injection molding machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910879261.8A CN110653995A (en) | 2019-09-18 | 2019-09-18 | Loading and unloading device for processing of vertical injection molding machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110653995A true CN110653995A (en) | 2020-01-07 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910879261.8A Withdrawn CN110653995A (en) | 2019-09-18 | 2019-09-18 | Loading and unloading device for processing of vertical injection molding machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110653995A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN206605719U (en) * | 2017-01-25 | 2017-11-03 | 东莞市川恩智能装备有限公司 | A kind of vertical injection molding machine automatic charging blanking mechanical hand of bridge-type |
| EP3382746A1 (en) * | 2017-03-31 | 2018-10-03 | Renesas Electronics Corporation | Resin molding method for manufacturing a semiconductor device |
| CN110154313A (en) * | 2018-04-16 | 2019-08-23 | 苏州菱慧电子科技有限公司 | A kind of rubber insert automation mould-entering device |
-
2019
- 2019-09-18 CN CN201910879261.8A patent/CN110653995A/en not_active Withdrawn
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN206605719U (en) * | 2017-01-25 | 2017-11-03 | 东莞市川恩智能装备有限公司 | A kind of vertical injection molding machine automatic charging blanking mechanical hand of bridge-type |
| EP3382746A1 (en) * | 2017-03-31 | 2018-10-03 | Renesas Electronics Corporation | Resin molding method for manufacturing a semiconductor device |
| CN110154313A (en) * | 2018-04-16 | 2019-08-23 | 苏州菱慧电子科技有限公司 | A kind of rubber insert automation mould-entering device |
Non-Patent Citations (1)
| Title |
|---|
| 张波: "《空面导弹系统设计》", 31 December 2013, 航空工业出版社 * |
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Application publication date: 20200107 |