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CN-121973393-A - Plastic shell injection molding device of high-efficient drawing of patterns

CN121973393ACN 121973393 ACN121973393 ACN 121973393ACN-121973393-A

Abstract

The invention relates to a plastic shell injection molding device with high-efficiency demolding, which comprises a frame, a dividing outer frame and a lifting driving mechanism. The frame is fixedly connected with a lower template provided with a plurality of male die cores in horizontal rows and longitudinal rows at equal intervals, and the lower template is provided with isolating grooves for separating adjacent male die cores. The dividing outer frame is connected in the isolation groove in a sliding way, and transverse parting strips and longitudinal parting strips which are connected with the isolation groove in a sliding way are fixedly connected on the dividing outer frame in an equidistant way along the row direction and the column direction respectively. The lower template is provided with a first linear driver for driving the split outer frame to move up and down, the lifting driving mechanism is arranged on the frame and is close to the upper side of the lower template, the lifting part of the lifting driving mechanism is fixedly connected with an upper template, and the upper template is internally provided with a female die cavity corresponding to the male die core and is connected with a corresponding number of injection molding runner assemblies. The invention enables the injection molding product monomer to be taken out more quickly, and also realizes that trimming treatment and chamfering trimming treatment are not required to be carried out on the segmented injection molding product.

Inventors

  • CAI QIJIAN

Assignees

  • 深圳市和鑫晟科技有限公司

Dates

Publication Date
20260505
Application Date
20260316

Claims (10)

  1. 1. The plastic shell injection molding device with high-efficiency demolding comprises a frame (101), wherein a lower template (200) is fixedly connected to the frame (101), a plurality of horizontal rows and a plurality of longitudinal rows of male die cores (201) are equidistantly arranged on the lower template (200) in a matrix mode, and isolation grooves (202) for separating adjacent male die cores (201) are formed in the lower template (200); The plastic injection molding machine is characterized by further comprising a dividing outer frame (210), wherein the dividing outer frame is connected in the isolation groove (202) of the lower mold plate (200) in a sliding mode, transverse division bars (220) which are one less than the number of transverse rows of the male mold cores (201) are fixedly connected on the dividing outer frame (210) in an equidistant mode along the row direction, the transverse division bars (220) are connected with the isolation groove (202) in a sliding mode, longitudinal division bars (230) which are one less than the number of longitudinal rows of the male mold cores (201) are connected on the dividing outer frame (210) in an equidistant mode along the column direction, the longitudinal division bars (230) are connected with the isolation groove (202) in a sliding mode, a dividing partition plate structure for dividing an injection molding product is formed by the dividing outer frame (210), all the transverse division bars (220) and all the longitudinal division bars (230), a first linear driver (240) for driving the dividing outer frame (210) to move up and down is arranged on the lower mold plate (200), a lifting driving mechanism (102) is arranged on the upper portion of the machine frame (101) which is arranged above the lower mold plate (200), lifting parts of the lifting driving mechanism (102) are fixedly connected with an upper mold plate (300), the number and positions of the upper mold plates (300) are arranged in the longitudinal direction, the number of the upper mold plates and the number of the longitudinal division bars correspond to the number of female mold cavities (301) and the corresponding to the number of molding cavities (301) in the upper mold blocks (301), the injection runner assembly (400) is communicated with the female die cavity (301) at the corresponding longitudinal position.
  2. 2. The injection molding device for plastic shells with high demolding efficiency according to claim 1, wherein the dividing outer frame (210), the transverse parting bead (220) and the longitudinal parting bead (230) are made of materials with heat expansion resistance and cold contraction resistance.
  3. 3. The injection molding device for the plastic shell with high efficiency in demolding according to claim 1, wherein the longitudinal parting strips (230) are connected with the dividing outer frame (210) and the transverse parting strips (220) in a sliding mode, second linear drivers (250) with the number corresponding to that of the longitudinal parting strips (230) are arranged on the lower die plate (200), and the telescopic end of each second linear driver (250) is fixedly connected with the corresponding longitudinal parting strip (230) for driving the longitudinal parting strips (230) to move up and down.
  4. 4. The injection molding device for the plastic shell with efficient demolding according to claim 1 is characterized in that each convex mold core (201) of a lower mold plate (200) is composed of a convex root structure (2011) and a cover plate part structure (2012), the convex root structure (2011) is connected with the inner bottom of the lower mold plate (200), the cover plate part structure (2012) is connected with the top of the convex root structure (2011) in a sliding mode, guide posts (260) are fixedly connected to each cover plate part structure (2012) of the lower mold plate (200), linkage plates (270) are fixedly connected to the lower ends of all the guide posts (260) after penetrating through the lower mold plate (200) downwards, and a jacking driver (280) is mounted on the lower mold plate (200), and the telescopic end of the jacking driver (280) is fixedly connected with the linkage plates (270) and used for driving the linkage plates (270) to move up and down.
  5. 5. The injection molding device for the plastic shell with high-efficiency demolding according to claim 4, wherein the guide posts (260) are of hollow tube structures, the cover plate part structures (2012) are provided with air outlet hole structures (20120) communicated with the hollow tube structures of the corresponding guide posts (260), the air outlet hole structures (20120) are initially covered by the corresponding protrusion root structures (2011), and the shunt manifold (290) is communicated between all the guide posts (260).
  6. 6. The injection molding device for the plastic shell with high-efficiency demolding is characterized in that an accommodating groove (302) is formed in an upper die plate (300), the accommodating groove (302) is matched with a partition plate structure, a sealing baffle plate (310) is connected in a sliding mode in the accommodating groove (302) of the upper die plate (300), a third linear driver (320) is mounted on the upper die plate (300), and the telescopic end of the third linear driver (320) is fixedly connected with the sealing baffle plate (310) and used for driving the sealing baffle plate (310) to move up and down.
  7. 7. The injection molding device for the plastic shell with high-efficiency demolding is characterized in that a cooling cavity structure is arranged in a sealing baffle plate (310), a liquid inlet pipe (330) communicated with the cooling cavity structure is arranged on one side of the sealing baffle plate (310), and a liquid outlet pipe (340) communicated with the cooling cavity structure is arranged on the other side of the sealing baffle plate (310).
  8. 8. An injection molding apparatus for plastic housing with high efficiency in demolding according to claim 1, wherein a peripheral edge area of each cavity (301) of the upper mold plate (300) is provided with a peripheral edge (303) protruding downward.
  9. 9. The injection molding device for the plastic shell with high efficiency in demolding according to claim 8, wherein the joint of each surrounding edge (303) of the upper template (300) and the corresponding die cavity (301) is provided with a chamfer structure.
  10. 10. The injection molding device for the plastic shell with high efficiency in demolding according to any one of claims 1 to 9, wherein the injection runner assembly (400) is composed of a main distributor (410) and a plurality of output pipes (420), the main distributor (410) is fixedly connected to an upper template (300) and is used for externally connecting an injection molding machine, the number of the output pipes (420) is the same as the number of the transverse rows of the female mold cavities (301), one output pipe (420) is correspondingly communicated with one female mold cavity (301) at the same longitudinal row position, and the plurality of output pipes (420) are communicated with the main distributor (410).

Description

Plastic shell injection molding device of high-efficient drawing of patterns Technical Field The invention relates to the field of plastic shell injection molding, in particular to a plastic shell injection molding device capable of efficiently demolding. Background In the injection molding production of plastic shells (such as mobile phone shells, tablet personal computer protective sleeves and the like) by using recycled plastics as raw materials, a one-piece mold process is often adopted, a plurality of injection molding products connected together are firstly injected and molded one by one in a splitting way in subsequent processing, the one-piece mold can finish forming of a plurality of pieces in the same injection cycle, the productivity is remarkably improved, the requirement of mass production is particularly met, a plurality of cavities share the same set of cooling, pouring gate and exhaust system, the mold structure is more compact, the plastic shells connected together are required to be split one by one after the injection molding processing is finished, and the injection molding products are required to be cooled and solidified firstly to be subjected to demolding processing, so that temperature gradient of the injection molding products generates internal shrinkage stress in the cooling process, particularly in the vicinity of splitting lines of the one-piece structure, and the split structure with uneven cooling can lead to stress concentration in the splitting process of the subsequent injection molding products, so that microcracking or macroscopic cracking is formed. The split surface of the injection molding product is easy to crack, and the overall attractiveness and the edge touch hand feeling of the single injection molding product such as a mobile phone shell are seriously affected. Disclosure of Invention In order to overcome the defect that the split surface of the cooled injection molding product with the integrated structure is easy to crack and influence the overall aesthetic degree and the edge touch hand feeling of a single injection molding product, the invention provides the injection molding device for the plastic shell, which is capable of efficiently demolding. The technical embodiment of the invention relates to a plastic shell injection molding device with high-efficiency demolding, which comprises a frame, wherein a lower template is fixedly connected to the frame, a plurality of horizontal rows and a plurality of longitudinal rows of male die cores are equidistantly arranged on the lower template in a matrix mode, and isolation grooves for separating adjacent male die cores are formed on the lower template; The partition outer frame is connected in the isolation groove of the lower template in a sliding way; the split outer frame is fixedly connected with transverse division bars which are one less than the number of the transverse rows of the convex mold cores in a row direction at equal intervals, the transverse division bars are connected with separation grooves in a sliding mode, longitudinal division bars which are one less than the number of the longitudinal rows of the convex mold cores are connected with the split outer frame in a row direction at equal intervals, the split outer frame, all the transverse division bars and all the longitudinal division bars form a split partition plate structure for splitting injection molding products together, a first linear driver for driving the split outer frame to move up and down is arranged on a lower template, a lifting driving mechanism is arranged on a frame above the lower template, an upper template is fixedly connected with lifting parts of the lifting driving mechanism, female mold cavities which are corresponding to the number and positions of the male mold cores are arranged in the upper template, injection molding runner components which are corresponding to the number of the longitudinal rows of the female mold cavities are connected with the upper template, and the injection molding runner components are communicated with the female mold cavities at the positions of the corresponding longitudinal rows. Furthermore, the outer frame, the transverse parting bead and the longitudinal parting bead are all made of materials with the performance of resisting thermal expansion and cold contraction. The lower template is provided with second linear drivers with the number corresponding to that of the longitudinal parting strips, and the telescopic end of each second linear driver is fixedly connected with the corresponding longitudinal parting strip for driving the longitudinal parting strip to move up and down. Further, each male die core of the lower die plate consists of a raised root structure and a cover plate structure, the raised root structure is connected with the inner bottom of the lower die plate, the cover plate structure is connected with the top of the raised root structure in a sliding mode, guide p