CN113858599B - Core-withdrawing turnover type plastic film blowing mechanism and core withdrawing method thereof - Google Patents
Core-withdrawing turnover type plastic film blowing mechanism and core withdrawing method thereof Download PDFInfo
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- CN113858599B CN113858599B CN202111121204.7A CN202111121204A CN113858599B CN 113858599 B CN113858599 B CN 113858599B CN 202111121204 A CN202111121204 A CN 202111121204A CN 113858599 B CN113858599 B CN 113858599B
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- 230000007246 mechanism Effects 0.000 title claims abstract description 32
- 238000010096 film blowing Methods 0.000 title claims abstract description 21
- 239000002985 plastic film Substances 0.000 title claims abstract description 20
- 229920006255 plastic film Polymers 0.000 title claims abstract description 20
- 230000007306 turnover Effects 0.000 title claims abstract description 11
- 238000000034 method Methods 0.000 title claims abstract description 8
- 238000000926 separation method Methods 0.000 claims abstract description 15
- 210000001503 joint Anatomy 0.000 claims description 45
- 238000009423 ventilation Methods 0.000 claims description 15
- 238000007789 sealing Methods 0.000 claims description 9
- 230000009471 action Effects 0.000 claims description 8
- 230000000149 penetrating effect Effects 0.000 claims description 8
- 238000001125 extrusion Methods 0.000 claims description 5
- 230000005484 gravity Effects 0.000 claims description 5
- 230000001105 regulatory effect Effects 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- 239000012768 molten material Substances 0.000 description 3
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000011229 interlayer Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000009415 formwork Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000003032 molecular docking Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C55/00—Shaping by stretching, e.g. drawing through a die; Apparatus therefor
- B29C55/28—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of blown tubular films, e.g. by inflation
-
- 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
- B29C33/00—Moulds or cores; Details thereof or accessories therefor
- B29C33/30—Mounting, exchanging or centering
- B29C33/306—Exchangeable mould parts, e.g. cassette moulds, mould inserts
-
- 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
- B29C33/00—Moulds or cores; Details thereof or accessories therefor
- B29C33/30—Mounting, exchanging or centering
- B29C33/308—Adjustable moulds
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Moulds, Cores, Or Mandrels (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
The invention discloses a core-withdrawing turnover plastic film blowing mechanism and a core withdrawing method thereof, wherein the core withdrawing turnover plastic film blowing mechanism comprises an annular mold shell, a withdrawal type mold core and a withdrawal driving mechanism; the retracting type mold core of the invention descends and then reverses to retract, and can realize rapid core retraction, so that the retracting type mold core is not blocked by the annular mold shell when rotating upwards to retract, and the separation is smooth and convenient.
Description
Technical Field
The invention relates to a core-withdrawing turnover plastic film blowing mechanism and a core withdrawing method thereof.
Background
In the prior art, when a film is produced, plastic particles are melted by a film blowing machine, then the melted materials are continuously heated to the most suitable temperature required by film blowing, the melted materials uniformly overflow from an annular interlayer, and then the melted materials are blown into the plastic film by using air uniformly blown out from the inside of the annular interlayer; however, the existing mold core is generally internally connected to the inside of the annular mold shell, so that when the mold core needs to be disassembled and cleaned, the mold core is quite inconvenient, in addition, the discharging amount of the molten material of the film cannot be well controlled when the film is blown, the specification of the film cannot be reasonably controlled, and the use is inflexible.
Disclosure of Invention
Aiming at the defects of the prior art, the invention solves the problems that: the core-withdrawing turnover plastic film blowing mechanism and the core withdrawing method thereof can realize quick core withdrawing cleaning and can adjust the discharge quantity.
In order to solve the problems, the invention adopts the following technical scheme:
A core-withdrawing turnover plastic film blowing mechanism comprises an annular mold shell, a withdrawal mold core and a withdrawal driving mechanism; the retreating type mold core is arranged in the annular mold shell; an annular overflow cavity is formed between the outer side of the periphery of the retreating type mold core and the inner side of the periphery of the annular mold shell in a surrounding manner; a sealing ring is arranged around the inner part of the lower end of the annular mould shell; the inner sides of the periphery of the sealing rings are in butt joint or separated connection with the periphery of the lower end of the withdrawal type mold core; the withdrawal driving mechanism is arranged below the annular mould shell and the withdrawal mould core; the withdrawal driving mechanism drives the withdrawal type mold core to move downwards from the annular mold shell and separate from the annular mold shell, and then the withdrawal type mold core is turned over to the outer side from the lower side of the annular mold shell.
Further, the retreating driving mechanism comprises a connecting column, a bottom ring body, a driving ring body, an external thread column, a butt joint column, a guiding limit rod, a positioning telescopic rod and a positioning cylinder; the two sides of the lower end of the annular mould shell are internally provided with splicing channels respectively; the lower end of the retreating type mold core is movably connected with the upper end of the butt joint column; the lower end of the butt joint column is connected with an external thread column; two sides of the upper end of the butt joint column are respectively provided with a guide limiting rod; the upper end of the guide limiting rod is slidably connected in the inserting channel in a penetrating way; the outer parts of two sides of the lower end of the annular mould shell are respectively provided with a connecting column; the lower ends of the connecting columns are jointly provided with a bottom ring body; the inner side of the bottom ring body is rotationally clamped and provided with a driving ring body; an internal thread ring surface is arranged around the inner side of the driving ring body; the inner side of the periphery of the driving ring body is in threaded sleeve connection with the outer side of the periphery of the external threaded column; the outer sides of the periphery of the butt joint columns are provided with separation annular grooves; the two sides of the upper end of the separation annular groove are respectively provided with a rotation concave groove; the inner sides of the lower ends of the connecting columns are respectively provided with a positioning cylinder; the inside of the positioning cylinder is respectively connected with a positioning telescopic rod in a sliding and penetrating way; the elastic piece is respectively sleeved on the positioning telescopic rod, the elastic piece elastically supports and presses the positioning telescopic rod inwards, the inner end of the positioning telescopic rod is supported and connected on the outer side face of the external thread column, and the outer end of the positioning telescopic rod extends to the outer side of the connecting column.
Further, the lower end of the withdrawal type mold core is provided with an internal thread ring body; an external thread ring groove is formed in the upper end of the butt joint column; the internal thread ring body is in threaded rotary connection with the external thread ring groove.
Further, a transverse ventilation groove is formed in the front side of the butt joint column; a longitudinal ventilation groove is formed in the upper end of the butt joint column; the lower end of the longitudinal ventilation groove is communicated with the inner end of the transverse ventilation groove; the upper end of the longitudinal ventilation groove extends to the middle of the upper end face of the butt joint column; an exhaust channel is arranged in the middle of the withdrawal type mold core; the lower end of the exhaust channel is in butt joint with the upper end of the longitudinal ventilation groove.
Further, the outer sides of the periphery of the positioning telescopic rods are provided with pressing baffle rings; the two ends of the elastic piece are respectively elastically abutted between the inner outer end of the positioning cylinder and the abutting baffle ring.
Further, the retreating type mold core is in a conical structure with a small upper part and a large lower part; a conical ring surface with a small upper part and a large lower part is arranged in the annular mold shell; and an annular overflow cavity with a conical structure with a small upper part and a large lower part is formed between the outer side of the periphery of the withdrawal type mold core and the inner side of the periphery of the annular mold shell.
Further, the lower end of the withdrawal type mold core is provided with a circular section; the inner sides of the peripheries of the sealing rings are in butt joint or separation connection with the outer sides of the peripheries of the annular sections.
Further, a feeding groove is formed in one side of the annular mould shell; the feeding groove is communicated with the annular overflow cavity through a feeding pipe.
A core withdrawing method of a core withdrawing turnover type plastic film blowing mechanism comprises the following steps: the first-choice rotary driving ring body utilizes the upper end of the guiding limiting rod to conduct downward guiding sliding action in the inserting channel, so that the external thread column and the butt joint column stably move downwards, the retreating type mold core is withdrawn from the lower part of the annular mold shell, when the driving ring body enters the separating annular groove on the outer side of the periphery of the butt joint column, the external thread column is pulled downwards or under the action of gravity, the upper end of the guiding limiting rod is separated from the inserting channel, and meanwhile, the outer end of the positioning telescopic rod is abutted in the rotating concave groove through elastic extrusion, so that the outer end of the positioning telescopic rod rotates through the rotating concave groove, the retreating type mold core is overturned for ninety degrees, and the retreating type mold core is rotationally separated from the external thread annular groove at the upper end of the butt joint column through the internal thread ring body, so that the retreating type mold core is retreated.
The beneficial effects of the invention are as follows:
1. According to the invention, a quick core withdrawal structure is realized, the withdrawal type mold core is withdrawn from the lower part of the annular mold shell through the rotation of the driving ring body, when the driving ring body enters the separation annular groove at the outer side of the periphery of the butt joint column, the upper end of the guide limiting rod is separated from the inserting channel through the action of gravity or the downward pulling of the external thread column, and meanwhile, the outer end of the positioning telescopic rod is abutted in the rotary concave groove through elastic extrusion, so that the withdrawal type mold core rotates at ninety degrees through the rotary concave groove at the outer end of the positioning telescopic rod, and the withdrawal type mold core is rotationally separated from the external thread annular groove at the upper end of the butt joint column through the internal thread ring body, so that the withdrawal type mold core is withdrawn after descending and reversing, and is prevented from being blocked by the annular mold shell when the withdrawal type mold core is rotated upwards, and separation is smoother and more convenient; when the installation is needed, the positioning telescopic rod is pulled outwards to enable the inner end of the positioning telescopic rod to be separated from the rotary concave groove, then the upper end of the guide limiting rod is directly connected into the inserting channel in a sliding and penetrating mode, and the driving ring body is rotated to enable the driving ring body to be sleeved on the external thread column again, so that the external thread column and the retreating type mold core move upwards, and the retreating type mold core enters the annular mold shell again to achieve core insertion.
2. The invention relates to a retractable mould core with a conical structure with a small upper part and a large lower part, wherein the inside of a circular mould shell is provided with a conical ring surface with the small upper part and the large lower part, and an annular overflow cavity with the conical structure with the small upper part and the large lower part is formed between the outer side of the periphery of the retractable mould core and the inner side of the periphery of the circular mould shell, so that the annular overflow cavity is smaller when the retractable mould core moves upwards, the annular overflow cavity is larger when the retractable mould core moves downwards, the discharge amount of molten materials can be regulated, and the specification of a film can be regulated.
Drawings
Fig. 1 is a schematic structural view of the present invention.
Fig. 2 is a schematic view of a partially enlarged structure of fig. 1 according to the present invention.
FIG. 3 is a schematic view of the structure of the present invention with the retracting mold core withdrawn from under the annular form.
Fig. 4 is an enlarged schematic view of the structure of fig. 3 according to the present invention.
FIG. 5 is a schematic view of the structure of the retracting mold core of the present invention.
Fig. 6 is a schematic view of the structure of the externally threaded post and the butt post of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
As shown in fig. 1 to 6, a core-withdrawing turnover plastic film blowing mechanism comprises a ring-shaped mould shell 1, a withdrawal type mould core 2 and a withdrawal driving mechanism 3; the retreating type mold core 2 is arranged in the annular mold shell 1; an annular overflow cavity 22 is formed between the outer sides of the periphery of the withdrawal type mold core 2 and the inner sides of the periphery of the annular mold shell 1; a sealing ring 15 is arranged around the inner part of the lower end of the annular mould shell 1; the inner sides of the periphery of the sealing rings 15 are in butt joint or separated connection with the periphery of the lower end of the withdrawal type mold core 2; the withdrawal driving mechanism 3 is arranged below the annular mould shell 1 and the withdrawal mould core 2; the retracting driving mechanism 3 drives the retracting mold core 2 to move downwards from the annular mold shell 1 and separate from the annular mold shell 1, and then the retracting mold core 2 is turned over from the lower side of the annular mold shell 1 to the outer side.
As shown in fig. 1 to 6, the retracting driving mechanism 3 further comprises a connecting column 32, a bottom ring 36, a driving ring 37, an external thread column 31, a butt joint column 33, a guiding limit rod 35, a positioning telescopic rod 34 and a positioning cylinder 38; the two sides of the lower end of the annular mould shell 1 are internally provided with splicing channels 11 respectively; the lower end of the retreating type mold core 2 is movably connected with the upper end of the butt joint column 33; the lower end of the butt joint column 33 is connected with an external thread column 31; two sides of the upper end of the butt joint column 33 are respectively provided with a guide limit rod 35; the upper end of the guide limiting rod 35 is slidably connected in the inserting channel 11 in a penetrating manner; a connecting column 32 is respectively arranged outside two sides of the lower end of the annular mould shell 1; the lower ends of the connecting posts 32 are commonly provided with a bottom ring 36; the inner side of the bottom ring body 36 is rotatably clamped and provided with a driving ring body 37; an internal thread ring surface is arranged around the inner side of the driving ring body 37; the inner side of the periphery of the driving ring body 37 is in threaded sleeve connection with the outer side of the periphery of the external threaded column 31; a separation annular groove 331 is arranged on the outer side of the periphery of the butt joint column 33; rotation concave grooves 332 are respectively arranged on two sides of the upper end of the separation annular groove 331; a positioning cylinder 38 is respectively arranged on the inner side of the lower end of the connecting column 32; the inside of the positioning cylinder 38 is respectively connected with a positioning telescopic rod 34 in a sliding and penetrating way; the positioning telescopic rods 34 are respectively sleeved with an elastic piece 342, the elastic piece 342 elastically presses the positioning telescopic rods 34 inwards, the inner ends of the positioning telescopic rods 34 are abutted on the outer side surfaces of the external thread columns 31, and the outer ends of the positioning telescopic rods 34 extend to the outer sides of the connecting columns 32.
As shown in fig. 1 to 6, it is further preferable that the lower end of the withdrawal type mold core 2 is provided with an internally threaded ring 28; an external thread ring groove 333 is arranged at the upper end of the butt joint column 33; the internally threaded ring 28 is threadedly coupled to the externally threaded ring groove 333. Further, a lateral ventilation groove 334 is formed on the front side of the docking post 33; a longitudinal ventilation groove 335 is formed in the upper end of the butt joint column 33; the lower end of the longitudinal air vent groove 335 communicates with the inner end of the transverse air vent groove 334; the upper end of the longitudinal ventilation groove 335 extends to the middle of the upper end face of the butt column 33; an exhaust passage 21 is arranged in the middle of the withdrawal type mold core 2; the lower end of the exhaust passage 21 is abutted with the upper end of the longitudinal air vent groove 335. Further, a pressing blocking ring 341 is arranged on the outer side of the periphery of the positioning telescopic rod 34; the two ends of the elastic member 342 are respectively elastically abutted between the inner and outer ends of the positioning cylinder 38 and the abutment stop ring 341. Further, the retreating type mold core 2 is in a conical structure with a small upper part and a large lower part; the inside of the annular mould shell 1 is provided with a conical ring surface 14 with a small upper part and a large lower part; the annular overflow cavity 22 with a conical structure with a small upper part and a large lower part is formed between the outer side of the periphery of the withdrawal type mold core 2 and the inner side of the periphery of the annular mold shell 1. Further, the lower end of the withdrawal type mold core 2 is provided with a circular ring section 23; the inner periphery of the sealing ring 15 is abutted or separated and connected with the outer periphery of the annular section 23. Further, a feeding groove 12 is formed in one side of the annular formwork 1; the feeding groove 12 is communicated with the annular overflow cavity 22 through the feeding pipe 13.
As shown in fig. 1 to 6, a core withdrawing method of a core withdrawing turnover type plastic film blowing mechanism comprises the following steps: the first choice rotates the driving ring body 37, utilize the upper end of the guiding stop lever 35 to guide the sliding action downwards in the jack-in channel 11, make external screw thread post 31 and butt joint post 33 steadily move downwards, make the withdrawal type mold core 2 withdraw from the annular form 1 below, when the driving ring body 37 gets into the separation annular recess 331 outside around the butt joint post 33, through the action of gravity or pulling down external screw thread post 31, make the upper end of the guiding stop lever 35 break away from the jack-in channel 11, the positioning telescopic rod 34 makes its outer end butt in rotating the concave groove 332 through elasticity extrusion at the same time, so rotate in rotating the concave groove 332 through the positioning telescopic rod 34, make the withdrawal type mold core 2 carry on ninety degrees upset, will withdraw the withdrawal type mold core 2 through the external screw thread annular groove 333 screw thread rotatory separation of internal screw thread ring 28 from the upper end of butt joint post 33, realize the withdrawal type mold core.
According to the invention, a quick core withdrawing structure is realized, the driving ring body 37 rotates to enable the withdrawal type mold core 2 to withdraw from the lower part of the annular mold shell 1, when the driving ring body 37 enters the separation annular groove 331 at the outer side of the periphery of the butt joint post 33, the outer threaded post 31 is pulled downwards or downwards under the action of gravity, so that the upper end of the guide limiting rod 35 is separated from the splicing channel 11, meanwhile, the outer end of the positioning telescopic rod 34 is abutted into the rotary concave groove 332 through elastic extrusion, the outer end of the positioning telescopic rod 34 rotates through the rotary concave groove 332, the withdrawal type mold core 2 is enabled to be overturned for ninety degrees, and the withdrawal type mold core 2 is separated from the outer threaded annular groove 333 at the upper end of the butt joint post 33 through the inner threaded ring body 28, so that the withdrawal type mold core 2 is firstly lowered and then reversed for core withdrawing, and the withdrawal type mold core 2 is prevented from being blocked by the annular mold shell 1 when being overturned upwards for withdrawal, and separation is more smooth and convenient; when the installation is needed, the positioning telescopic rod 34 is pulled outwards to enable the inner end of the positioning telescopic rod to be separated from the rotating concave groove 332, then the upper end of the guiding limit rod 35 is directly connected into the inserting channel 11 in a sliding and penetrating mode, the driving ring body 37 is rotated to enable the driving ring body 37 to be sleeved on the external thread column 31 again, the external thread column 31 and the retreating type mold core 2 move upwards, and the retreating type mold core 2 enters the annular mold shell 1 again to achieve core insertion.
The retractable mould core 2 is in a conical structure with a small upper part and a large lower part, a conical ring surface with a small upper part and a large lower part is arranged in the annular mould shell 1, and an annular overflow cavity 22 with a conical structure with a small upper part and a large lower part is formed between the outer side of the periphery of the retractable mould core 2 and the inner side of the periphery of the annular mould shell 1, so that the annular overflow cavity is smaller when the retractable mould core 2 moves upwards, and the annular overflow cavity is larger when the retractable mould core 2 moves downwards, so that the discharge amount of molten materials can be regulated, and the specification of a film can be regulated.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the invention.
Claims (8)
1. The core-withdrawing turnover plastic film blowing mechanism is characterized by comprising an annular mold shell, a withdrawal mold core and a withdrawal driving mechanism; the retreating type mold core is arranged in the annular mold shell; an annular overflow cavity is formed between the outer side of the periphery of the retreating type mold core and the inner side of the periphery of the annular mold shell in a surrounding manner; a sealing ring is arranged around the inner part of the lower end of the annular mould shell; the inner sides of the periphery of the sealing rings are in butt joint or separated connection with the periphery of the lower end of the withdrawal type mold core; the withdrawal driving mechanism is arranged below the annular mould shell and the withdrawal mould core; the withdrawal driving mechanism drives the withdrawal type mold core to move downwards from the annular mold shell and separate from the annular mold shell, and then the withdrawal type mold core is turned over to the outer side from the lower part of the annular mold shell; the backing driving mechanism comprises a connecting column, a bottom ring body, a driving ring body, an external thread column, a butt joint column, a guide limit rod, a positioning telescopic rod and a positioning cylinder; the two sides of the lower end of the annular mould shell are internally provided with splicing channels respectively; the lower end of the retreating type mold core is movably connected with the upper end of the butt joint column; the lower end of the butt joint column is connected with an external thread column; two sides of the upper end of the butt joint column are respectively provided with a guide limiting rod; the upper end of the guide limiting rod is slidably connected in the inserting channel in a penetrating way; the outer parts of two sides of the lower end of the annular mould shell are respectively provided with a connecting column; the lower ends of the connecting columns are jointly provided with a bottom ring body; the inner side of the bottom ring body is rotationally clamped and provided with a driving ring body; an internal thread ring surface is arranged around the inner side of the driving ring body; the inner side of the periphery of the driving ring body is in threaded sleeve connection with the outer side of the periphery of the external threaded column; the outer sides of the periphery of the butt joint columns are provided with separation annular grooves; the two sides of the upper end of the separation annular groove are respectively provided with a rotation concave groove; the inner sides of the lower ends of the connecting columns are respectively provided with a positioning cylinder; the inside of the positioning cylinder is respectively connected with a positioning telescopic rod in a sliding and penetrating way; the elastic piece is respectively sleeved on the positioning telescopic rod, the elastic piece elastically supports and presses the positioning telescopic rod inwards, the inner end of the positioning telescopic rod is supported and connected on the outer side face of the external thread column, and the outer end of the positioning telescopic rod extends to the outer side of the connecting column.
2. The core-withdrawing and overturning type plastic film blowing mechanism according to claim 1, wherein an internal thread ring body is arranged at the lower end of the withdrawal type mold core; an external thread ring groove is formed in the upper end of the butt joint column; the internal thread ring body is in threaded rotary connection with the external thread ring groove.
3. The core-withdrawing roll-over type plastic film blowing mechanism according to claim 2, wherein a transverse ventilation groove is formed on the front side of the butt joint column; a longitudinal ventilation groove is formed in the upper end of the butt joint column; the lower end of the longitudinal ventilation groove is communicated with the inner end of the transverse ventilation groove; the upper end of the longitudinal ventilation groove extends to the middle of the upper end face of the butt joint column; an exhaust channel is arranged in the middle of the withdrawal type mold core; the lower end of the exhaust channel is in butt joint with the upper end of the longitudinal ventilation groove.
4. The core-withdrawing and overturning type plastic film blowing mechanism according to claim 1, wherein a pressing baffle ring is arranged on the outer side of the periphery of the positioning telescopic rod; the two ends of the elastic piece are respectively elastically abutted between the inner outer end of the positioning cylinder and the abutting baffle ring.
5. The core-withdrawing roll-over type plastic film blowing mechanism according to claim 1, wherein the core-withdrawing roll-over type plastic film blowing mechanism is in a conical structure with a smaller upper part and a larger lower part; a conical ring surface with a small upper part and a large lower part is arranged in the annular mold shell; and an annular overflow cavity with a conical structure with a small upper part and a large lower part is formed between the outer side of the periphery of the withdrawal type mold core and the inner side of the periphery of the annular mold shell.
6. The core-withdrawing roll-over type plastic film blowing mechanism according to claim 5, wherein a circular ring section is arranged at the lower end of the roll-off type mold core; the inner sides of the peripheries of the sealing rings are in butt joint or separation connection with the outer sides of the peripheries of the annular sections.
7. The core-withdrawing and overturning type plastic film blowing mechanism according to claim 1, wherein a feeding groove is formed in one side of the annular mold shell; the feeding groove is communicated with the annular overflow cavity through a feeding pipe.
8. A method for withdrawing a core of the withdrawing roll-over type plastic film blowing mechanism according to claim 2, characterized by comprising the steps of: the first-choice rotary driving ring body utilizes the upper end of the guiding limiting rod to conduct downward guiding sliding action in the inserting channel, so that the external thread column and the butt joint column stably move downwards, the retreating type mold core is withdrawn from the lower part of the annular mold shell, when the driving ring body enters the separating annular groove on the outer side of the periphery of the butt joint column, the external thread column is pulled downwards or under the action of gravity, the upper end of the guiding limiting rod is separated from the inserting channel, and meanwhile, the outer end of the positioning telescopic rod is abutted in the rotating concave groove through elastic extrusion, so that the outer end of the positioning telescopic rod rotates through the rotating concave groove, the retreating type mold core is overturned for ninety degrees, and the retreating type mold core is rotationally separated from the external thread annular groove at the upper end of the butt joint column through the internal thread ring body, so that the retreating type mold core is retreated.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111121204.7A CN113858599B (en) | 2021-09-24 | 2021-09-24 | Core-withdrawing turnover type plastic film blowing mechanism and core withdrawing method thereof |
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| CN202111121204.7A CN113858599B (en) | 2021-09-24 | 2021-09-24 | Core-withdrawing turnover type plastic film blowing mechanism and core withdrawing method thereof |
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| CN113858599B true CN113858599B (en) | 2024-06-07 |
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| JP2003145606A (en) * | 2001-11-12 | 2003-05-20 | Bridgestone Corp | Apparatus for producing resin tube |
| JP2009113317A (en) * | 2007-11-06 | 2009-05-28 | Shikoku Kako Kk | Die apparatus for blow-molding multilayer film |
| CN205167540U (en) * | 2015-12-08 | 2016-04-20 | 江苏英普科电子材料有限公司 | High -efficient inflation film manufacturing machine is used in plastic film production |
| CN207808431U (en) * | 2018-01-30 | 2018-09-04 | 姚建珍 | A kind of electric wire Teflon coating extruded mould |
| CN208629808U (en) * | 2018-07-05 | 2019-03-22 | 合肥市惠华电子有限公司 | A kind of closing set plastic mould |
| CN210625268U (en) * | 2019-09-04 | 2020-05-26 | 南京乔康生物科技有限公司 | Drying device of flexible regulation formula vitamin C sodium phosphate |
| CN110547810A (en) * | 2019-09-23 | 2019-12-10 | 江苏科华医疗器械科技有限公司 | Radial and axial double-floating type blood sampling device |
| CN212219168U (en) * | 2020-02-25 | 2020-12-25 | 瑞安市万泰汽车电器有限公司 | Core-pulling mechanism of automobile thermostat mould |
| CN211882330U (en) * | 2020-03-13 | 2020-11-10 | 南京市第一医院 | Movable detachable protective mask |
| CN112010071A (en) * | 2020-07-27 | 2020-12-01 | 江苏中大包装材料有限公司 | Regulation formula film collector |
| CN213733380U (en) * | 2020-08-03 | 2021-07-20 | 荆州市松圣塑业有限公司 | Novel blowing die head is used in production of thermal contraction membrane |
| CN213593515U (en) * | 2020-09-30 | 2021-07-02 | 苏州工业园区盛善发精密机械有限公司 | Plastic mold blank convenient for rapidly replacing mold core |
| CN113400589A (en) * | 2021-07-29 | 2021-09-17 | 江苏亨通光电股份有限公司 | Mold for producing optical fiber sleeve |
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