CN104139485A - Process for manufacturing bottom box of threading box - Google Patents
Process for manufacturing bottom box of threading box Download PDFInfo
- Publication number
- CN104139485A CN104139485A CN201410308111.9A CN201410308111A CN104139485A CN 104139485 A CN104139485 A CN 104139485A CN 201410308111 A CN201410308111 A CN 201410308111A CN 104139485 A CN104139485 A CN 104139485A
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- CN
- China
- Prior art keywords
- plastic
- plastics
- temperature
- cooling
- injection
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/03—Injection moulding apparatus
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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
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/1769—Handling of moulded articles or runners, e.g. sorting, stacking, grinding of runners
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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
- B29C71/00—After-treatment of articles without altering their shape; Apparatus therefor
- B29C71/02—Thermal after-treatment
- B29C2071/022—Annealing
-
- 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
- B29C71/00—After-treatment of articles without altering their shape; Apparatus therefor
- B29C71/0009—After-treatment of articles without altering their shape; Apparatus therefor using liquids, e.g. solvents, swelling agents
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/712—Containers; Packaging elements or accessories, Packages
- B29L2031/7162—Boxes, cartons, cases
Abstract
The invention discloses a process for manufacturing a bottom box of a threading box. The process comprises the following steps: feeding and preheating, wherein the preheating temperature is 80-120 DEG C; plasticizing at the temperature of 160-220 DEG C for 1-5h, wherein the temperature of all parts of plasticized materials is uniform as much as possible, and the content of thermal-decomposed products also needs to achieve 0.1-0.3 percent; performing pressure injection; maintaining pressure, wherein the step is implemented during the process from finishing of injection to backward moving of a plunger or a threaded rod; cooling and sizing, wherein when plastic of a pouring system is cooled and solidified, the plunger or the threaded rod can return, and meanwhile, a cooling medium such as cooling water or air is introduced to further cool a mold; demolding, wherein the mold can be opened when a plastic part is cooled to certain temperature, and the plastic part is pushed out of the mold under the action of a push mechanism; and performing plastic post-processing. The manufacture process is precise, is good in post-processing, speeds up reaction, is high in working efficiency, and is convenient for workers to operate.
Description
Technical field
The manufacture craft that the present invention relates to box at the bottom of a kind of PULL BOX, belongs to mould of plastics field.
Background technology
Plastics industry is made up of plastic raw materials and the plastic products two large systems of producing, the two complements each other, indispensable, and plastic products production is the only resource of realizing plastic raw materials self-value, the object that plastic products are produced is exactly the performance according to various plastics, utilize various processes, become the article or the shaping material that there is definite shape and have use value, plastic products are produced and are mainly made up of links such as moulding, machining, incrustation, assemblings, and its important ring is exactly plastic shaping.
Plastic shaping is exactly the plastic raw materials of various forms (powder, pellet, solution or dispersion) to be made to the process of goods or the embryo part of required form, and the method for plastic shaping is a lot, as injection moulding, blowing, extrude etc.And injection mo(u)lding occupies an important seat with goods and the high efficiency of its energy moulding high dimensional accuracy, high complexity, plastic mould material directly affects the Shi Shou Ming ﹑ processing cost of mold and the Forming Quality of product, while therefore design, will correctly select mold materials.
Injection molding process is that plastic raw materials enters cartridge heater from the hopper of injection machine, after plasticizing, by the promotion of plunger or screw rod, under certain pressure, enters mold cavity by nozzle, die sinking acquisition goods (plastic) after cooling curing.Except a few plastic, nearly all plastic can injection mo(u)lding.According to relevant statistics, injection-molded item accounts for 1/3rd of all molded item total outputs; Injection mold accounts for the more than 1/2nd of mould for plastics quantity.The application of injection moulded products is very extensive, and along with the updating of plastic raw materials, progressively replaces traditional metal and the goods of nonmetallic materials, and development injection mold is well worth doing.
Summary of the invention
Goal of the invention: in order to overcome problems of the prior art, the invention provides the manufacture craft of box at the bottom of a kind of PULL BOX.
Technical scheme: for achieving the above object, the invention provides the manufacture craft of box at the bottom of a kind of PULL BOX, comprise the steps:
A, reinforced preheating: fall into a certain amount of plastics by injection hopper, 80 DEG C～120 DEG C of preheat temperatures, to ensure stable operation, plastics plasticizing evenly, finally obtain good plastic;
B, plasticizing: 160 DEG C～220 DEG C of plasticization temperatures, fusion time 1h～15h, make again the plasticizing material temperature everywhere uniformity of trying one's best, also will make the content 0.1%～0.3% of pyrolysate, these require with characteristic, the control of process conditions and the structure of injector plasticizing apparatus etc. of plastics closely related.
C, vasopressing injection: injector promotes to have mobility and the uniform plastic melt of temperature with plunger or screw rod, from barrel, process nozzle, running gate system are until inject die cavity;
D, pressurize: pressurize is to finish to this section of process of moving after plunger or screw rod start Zi injection, be compacting operation, the object of pressurize is after preventing that injection pressure from removing, if cast gate not yet freezes on the one hand, there is melt in die cavity and flow to running gate system by cast gate, cause melt to flow backwards; Be on the other hand in the time that melt cooling in die cavity shrinks, continue to keep the plunger of pressurized state or screw rod can force near the melt of cast gate constantly to supplement in progressive die tool, make plastics in die cavity can mold the plastic that shape is complete and fine and close;
E, cooling and shaping: when the cooled and solidified of plastics of running gate system, continuing pressurize no longer needs, and now can return plunger or screw rod, passes into the cooling medium such as cooling water or air simultaneously, and further cooling to mould, this one-phase claims cooling and shaping; In fact cooling and shaping process is from plastics just inject die cavity, and it comprises from having injected, pressurize is to this period of time the demoulding;
F, the demoulding: plastic is cooled to uniform temperature to get final product die sinking, under the effect of ejecting mechanism by outside plastic launch mode;
The post processing of g, plastic film.
License complete process of the present invention is simple, has accelerated the reaction time, has improved operating efficiency.
The post processing of described plastic film, step is as follows:
A, annealing in process: annealing in process is to make plastic leave standstill a period of time in the heating liquid medium (as hot water glycerine and atoleine) of constant temperature or hot air circulate baking oven, then the process of Slow cooling, its object be to reduce due to plastic in barrel plasticizing inhomogeneous or in die cavity cooling velocity inconsistent, and formation internal stress, this is particularly important in the time producing heavy wall or obtain plastic with metal inserted piece, general annealing temperature is controlled at above 10～15 DEG C of plastic serviceability temperature, or lower than 10～20 DEG C of the heat distortion temperatures of plastics, the time of annealing in process is depended on plastic kind, heat medium, temperature, the shape of plastic and condition of molding, after annealing time arrives, plastic slowly cools to room temperature, cooling too fast, likely regenerate internal stress.
B, conditioning: the plastic of the firm demoulding is placed in hot water and is processed, to completely cut off air, prevent plastic oxidation and variable color, meanwhile, quickening reaches a kind of processing method of moisture equilibrium at dry side, by processing, makes the color characteristics of plastic and size reach stable.
Manufacture craft precision of the present invention, post processing puts in place, facilitates staff to operate;
Beneficial effect: the present invention compared with prior art tool has the following advantages:
1, manufacture craft precision of the present invention, post processing puts in place, facilitates staff to operate;
2, the present invention has accelerated the reaction time, has improved operating efficiency.
Brief description of the drawings
Fig. 1: be the fabrication processing figure of box at the bottom of the PULL BOX of the present embodiment.
Detailed description of the invention
Below in conjunction with accompanying drawing and by specific embodiment, the present invention is further elaborated, be noted that for those skilled in the art, under the premise without departing from the principles of the invention, the amendment of the various equivalent form of values of the present invention is all fallen within to the application's claims limited range.
Embodiment 1:
A manufacture craft for box at the bottom of PULL BOX, is characterized in that: comprise the steps:
A, reinforced preheating: fall into a certain amount of plastics by injection hopper, to ensure stable operation, plastics plasticizing evenly, finally obtain good plastic, 80 DEG C of preheat temperatures;
B, plasticizing: 160 DEG C of plasticization temperatures, fusion time 1h, makes the plasticizing material temperature everywhere uniformity of trying one's best again, also will make the content 0.1% of pyrolysate;
C, vasopressing injection: injector promotes to have mobility and the uniform plastic melt of temperature with plunger or screw rod, from barrel, process nozzle, running gate system are until inject die cavity;
D, pressurize: pressurize is to finish to this section of process of moving after plunger or screw rod start Zi injection, be compacting operation, the object of pressurize is after preventing that injection pressure from removing, if cast gate not yet freezes on the one hand, there is melt in die cavity and flow to running gate system by cast gate, cause melt to flow backwards; Be on the other hand in the time that melt cooling in die cavity shrinks, continue to keep the plunger of pressurized state or screw rod can force near the melt of cast gate constantly to supplement in progressive die tool, make plastics in die cavity can mold the plastic that shape is complete and fine and close;
E, cooling and shaping: when the cooled and solidified of plastics of running gate system, continuing pressurize no longer needs, and now can return plunger or screw rod, passes into the cooling medium such as cooling water or air simultaneously, and further cooling to mould, this one-phase claims cooling and shaping; In fact cooling and shaping process is from plastics just inject die cavity, and it comprises from having injected, pressurize is to this period of time the demoulding;
F, the demoulding: plastic is cooled to uniform temperature to get final product die sinking, under the effect of ejecting mechanism by outside plastic launch mode;
The post processing of g, plastics: annealing in process is to make plastic leave standstill a period of time in the heating liquid medium of constant temperature or hot air circulate baking oven, then Slow cooling, annealing temperature is controlled at above 10 DEG C of plastic serviceability temperature, or lower than 10 DEG C of the heat distortion temperatures of plastics, conditioning, the plastic of the firm demoulding is placed in hot water and is processed, accelerate to reach a kind of processing method of moisture equilibrium at dry side.
Embodiment 2:
A manufacture craft for box at the bottom of PULL BOX, is characterized in that: comprise the steps:
A, reinforced preheating: fall into a certain amount of plastics by injection hopper, to ensure stable operation, plastics plasticizing evenly, finally obtain good plastic, 95 DEG C of preheat temperatures;
B, plasticizing: 198 DEG C of plasticization temperatures, fusion time 1.3h, makes the plasticizing material temperature everywhere uniformity of trying one's best again, also will make the content 0.2% of pyrolysate;
C, vasopressing injection: injector promotes to have mobility and the uniform plastic melt of temperature with plunger or screw rod, from barrel, process nozzle, running gate system are until inject die cavity;
D, pressurize: pressurize is to finish to this section of process of moving after plunger or screw rod start Zi injection, be compacting operation, the object of pressurize is after preventing that injection pressure from removing, if cast gate not yet freezes on the one hand, there is melt in die cavity and flow to running gate system by cast gate, cause melt to flow backwards; Be on the other hand in the time that melt cooling in die cavity shrinks, continue to keep the plunger of pressurized state or screw rod can force near the melt of cast gate constantly to supplement in progressive die tool, make plastics in die cavity can mold the plastic that shape is complete and fine and close;
E, cooling and shaping: when the cooled and solidified of plastics of running gate system, continuing pressurize no longer needs, and now can return plunger or screw rod, passes into the cooling medium such as cooling water or air simultaneously, and further cooling to mould, this one-phase claims cooling and shaping; In fact cooling and shaping process is from plastics just inject die cavity, and it comprises from having injected, pressurize is to this period of time the demoulding;
F, the demoulding: plastic is cooled to uniform temperature to get final product die sinking, under the effect of ejecting mechanism by outside plastic launch mode;
The post processing of g, plastics: annealing in process is to make plastic leave standstill a period of time in the heating liquid medium of constant temperature or hot air circulate baking oven, then Slow cooling, annealing temperature is controlled at above 13 DEG C of plastic serviceability temperature, or lower than 17 DEG C of the heat distortion temperatures of plastics, conditioning, the plastic of the firm demoulding is placed in hot water and is processed, accelerate to reach a kind of processing method of moisture equilibrium at dry side.
Embodiment 3:
A manufacture craft for box at the bottom of PULL BOX, is characterized in that: comprise the steps:
A, reinforced preheating: fall into a certain amount of plastics by injection hopper, to ensure stable operation, plastics plasticizing evenly, finally obtain good plastic, 120 DEG C of preheat temperatures;
B, plasticizing: 220 DEG C of plasticization temperatures, fusion time 1.5h, makes the plasticizing material temperature everywhere uniformity of trying one's best again, also will make the content 0.3% of pyrolysate;
C, vasopressing injection: injector promotes to have mobility and the uniform plastic melt of temperature with plunger or screw rod, from barrel, process nozzle, running gate system are until inject die cavity;
D, pressurize: pressurize is to finish to this section of process of moving after plunger or screw rod start Zi injection, be compacting operation, the object of pressurize is after preventing that injection pressure from removing, if cast gate not yet freezes on the one hand, there is melt in die cavity and flow to running gate system by cast gate, cause melt to flow backwards; Be on the other hand in the time that melt cooling in die cavity shrinks, continue to keep the plunger of pressurized state or screw rod can force near the melt of cast gate constantly to supplement in progressive die tool, make plastics in die cavity can mold the plastic that shape is complete and fine and close;
E, cooling and shaping: when the cooled and solidified of plastics of running gate system, continuing pressurize no longer needs, and now can return plunger or screw rod, passes into the cooling medium such as cooling water or air simultaneously, and further cooling to mould, this one-phase claims cooling and shaping; In fact cooling and shaping process is from plastics just inject die cavity, and it comprises from having injected, pressurize is to this period of time the demoulding;
F, the demoulding: plastic is cooled to uniform temperature to get final product die sinking, under the effect of ejecting mechanism by outside plastic launch mode;
The post processing of g, plastics: annealing in process is to make plastic leave standstill a period of time in the heating liquid medium of constant temperature or hot air circulate baking oven, then Slow cooling, annealing temperature is controlled at above 15 DEG C of plastic serviceability temperature, or lower than 20 DEG C of the heat distortion temperatures of plastics, conditioning, the plastic of the firm demoulding is placed in hot water and is processed, accelerate to reach a kind of processing method of moisture equilibrium at dry side.
Injection moulding is that principle is that graininess or powdered plastic are sent to the barrel of heating from the hopper of injection machine, through heating and melting, plasticizing becomes viscous state melt, under the pushed at high pressure of injection plunger or screw rod, inject mold cavity with very large flow velocity by nozzle, the shape that can keep mold cavity to give after the pressurize cooling and shaping of certain hour, then die sinking somatotype obtains moulding plastic, has so just completed one action circulation.
Claims (2)
1. a manufacture craft for box at the bottom of PULL BOX, is characterized in that: comprise the steps:
A, reinforced preheating: fall into a certain amount of plastics by injection hopper, to ensure stable operation, plastics plasticizing evenly, finally obtain good plastic, 80 DEG C～120 DEG C of preheat temperatures;
B, plasticizing: 160 DEG C～220 DEG C of plasticization temperatures, fusion time 1h～15h, makes the plasticizing material temperature everywhere uniformity of trying one's best again, also will make the content 0.1%～0.3% of pyrolysate;
C, vasopressing injection: injector promotes to have mobility and the uniform plastic melt of temperature with plunger or screw rod, from barrel, process nozzle, running gate system are until inject die cavity;
D, pressurize: pressurize is to finish to this section of process of moving after plunger or screw rod start, i.e. compacting operation Zi injection;
E, cooling and shaping: when the cooled and solidified of plastics of running gate system, now can return plunger or screw rod, pass into the cooling medium such as cooling water or air simultaneously, further cooling to mould;
F, the demoulding: plastic is cooled to uniform temperature to get final product die sinking, under the effect of ejecting mechanism by outside plastic launch mode;
The post processing of g, plastics.
2. according to the manufacture craft of box at the bottom of a kind of PULL BOX described in claims 1, it is characterized in that: the post processing of described plastics, step is as follows:
A, annealing in process: annealing in process is to make plastic in the heating liquid medium of constant temperature or hot air circulate baking oven, leave standstill a period of time, then Slow cooling, annealing temperature is controlled at above 10～15 DEG C of plastic serviceability temperature, or lower than 10～20 DEG C of the heat distortion temperatures of plastics;
B, conditioning: the plastic of the firm demoulding is placed in hot water and is processed, accelerate to reach a kind of processing method of moisture equilibrium at dry side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410308111.9A CN104139485A (en) | 2014-07-01 | 2014-07-01 | Process for manufacturing bottom box of threading box |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410308111.9A CN104139485A (en) | 2014-07-01 | 2014-07-01 | Process for manufacturing bottom box of threading box |
Publications (1)
| Publication Number | Publication Date |
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| CN104139485A true CN104139485A (en) | 2014-11-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410308111.9A Pending CN104139485A (en) | 2014-07-01 | 2014-07-01 | Process for manufacturing bottom box of threading box |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105365149A (en) * | 2015-12-11 | 2016-03-02 | 滁州市博康模具塑料有限公司 | ABS (acrylonitrile butadiene styrene) material injection molding process |
| CN106739027A (en) * | 2017-01-20 | 2017-05-31 | 埃维柯塑料科技（安徽）有限公司 | A kind of annealing process of thermoplastic valve |
| CN107383470A (en) * | 2017-06-27 | 2017-11-24 | 苏州亚得宝消防设备有限公司 | Distribute the environmentally-friendly plastic for smell of calming the nerves |
| CN108789924A (en) * | 2018-05-02 | 2018-11-13 | 芜湖众梦电子科技有限公司 | A kind of injecting glue forming method for lamp decoration shell |
| CN109016573A (en) * | 2018-06-19 | 2018-12-18 | 深圳市凯尔斯塑胶电子有限公司 | The injection molding production line and Shooting Technique of ABS Watchcase |
| CN109822844A (en) * | 2019-03-11 | 2019-05-31 | 勋龙智造精密应用材料（苏州）股份有限公司 | A kind of Shooting Technique being molded fixture of the rail |
| CN112109273A (en) * | 2020-09-01 | 2020-12-22 | 无锡强联电气设备有限公司 | BMC material injection molding process |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105365149A (en) * | 2015-12-11 | 2016-03-02 | 滁州市博康模具塑料有限公司 | ABS (acrylonitrile butadiene styrene) material injection molding process |
| CN106739027A (en) * | 2017-01-20 | 2017-05-31 | 埃维柯塑料科技（安徽）有限公司 | A kind of annealing process of thermoplastic valve |
| CN107383470A (en) * | 2017-06-27 | 2017-11-24 | 苏州亚得宝消防设备有限公司 | Distribute the environmentally-friendly plastic for smell of calming the nerves |
| CN108789924A (en) * | 2018-05-02 | 2018-11-13 | 芜湖众梦电子科技有限公司 | A kind of injecting glue forming method for lamp decoration shell |
| CN109016573A (en) * | 2018-06-19 | 2018-12-18 | 深圳市凯尔斯塑胶电子有限公司 | The injection molding production line and Shooting Technique of ABS Watchcase |
| CN109822844A (en) * | 2019-03-11 | 2019-05-31 | 勋龙智造精密应用材料（苏州）股份有限公司 | A kind of Shooting Technique being molded fixture of the rail |
| CN112109273A (en) * | 2020-09-01 | 2020-12-22 | 无锡强联电气设备有限公司 | BMC material injection molding process |
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Address after: 212214 Jiangsu city of Yangzhong Province You Fang Zhen Chang Wang Shuangqiao North Street Applicant after: Jiangsu Haiwei Group Co., Ltd. Address before: 212214 Jiangsu city of Yangzhou province Yangzhong City Mayor Wang Youfang Street North Shuangqiaoshan Applicant before: Jiangsu Haiwei Group Co., Ltd. |
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Application publication date: 20141112 |