Plastic shell injection molding device with efficient demolding function

Abstract

The invention relates to a plastic shell injection molding device with an efficient demolding function. The plastic shell injection molding device comprises a rack, a dividing outer frame and a lifting driving mechanism. A lower die plate is fixedly connected to the machine frame, a plurality of male die cores in transverse and longitudinal rows are arranged on the lower die plate at equal intervals, and isolation grooves used for separating the adjacent male die cores are formed in the lower die plate. The segmentation outer frame is slidably connected into the isolation groove. Transverse division bars and longitudinal division bars which are in sliding connection with the isolation grooves are fixedly connected to the division outer frame in the row direction and the column direction at equal intervals respectively. A first linear driver for driving the dividing outer frame to move up and down is mounted on the lower template; the lifting driving mechanism is arranged above the rack close to the lower template, and a lifting part of the lifting driving mechanism is fixedly connected with an upper template; and a concave mold cavity corresponding to the convex mold core is formed in the upper mold plate, and the upper mold plate is connected with a corresponding number of injection molding runner components. The injection molding product single body can be taken out more quickly, and trimming treatment and chamfering finishing treatment do not need to be carried out on the segmented injection molding product.

Description

Technical Field

[0001] This invention relates to the field of plastic shell injection molding, and more particularly to a high-efficiency demolding plastic shell injection molding apparatus. Background Technology

[0002] In injection molding production of plastic casings (such as mobile phone cases and tablet cases) using recycled plastics as raw materials, a continuous mold process is often used. Multiple injection-molded products are first injection-molded together, and then separated individually in subsequent processing. The continuous mold process allows multiple parts to be molded in a single injection cycle, significantly increasing production capacity, especially suitable for mass production. Multiple cavities share the same cooling, gating, and venting system, resulting in a more compact mold structure. However, after injection molding, the multiple connected plastic casings still need to be separated individually. Since the injection-molded products need to cool and solidify before demolding, the temperature gradient during cooling generates internal shrinkage stress, especially near the dividing lines of the continuous structure. During subsequent separation, uneven cooling of the continuous structure causes stress concentration, forming micro-cracks or macro-cracks. This makes the separation surfaces of the injection-molded products prone to cracking, severely affecting the overall aesthetics and tactile feel of individual injection-molded products such as mobile phone cases. Summary of the Invention

[0003] To overcome the problem that cracks easily appear on the dividing surfaces of integral injection molded products after cooling, which affects the overall aesthetics and tactile feel of individual injection molded products, this invention provides a high-efficiency demolding injection molding device for plastic shells.

[0004] The technical implementation of the present invention is as follows: a high-efficiency demolding plastic shell injection molding device, including a frame; a lower template is fixedly connected to the frame; multiple horizontal and multiple vertical punches are arranged in a matrix at equal intervals on the lower template, and an isolation groove for separating adjacent punches is opened on the lower template. It also includes a dividing outer frame, which is slidably connected to the isolation groove of the lower template; the dividing outer frame is fixedly connected at equal intervals along the row direction with one less transverse partition bar than the number of punch cores, and the transverse partition bar is slidably connected to the isolation groove; the dividing outer frame is fixedly connected at equal intervals along the column direction with one less longitudinal partition bar than the number of punch cores, and the longitudinal partition bar is slidably connected to the isolation groove; the dividing outer frame, all transverse partition bars and all longitudinal partition bars together form a dividing partition structure for dividing the injection molded product; a first linear actuator is installed on the lower template to drive the dividing outer frame to move up and down; a lifting drive mechanism is installed on the frame above the lower template; the lifting component of the lifting drive mechanism is fixedly connected to the upper template; the upper template has concave mold cavities in number and position corresponding to the punch cores; the upper template is connected to injection runner assemblies in number corresponding to the number of concave mold cavity columns, and the injection runner assemblies are connected to the concave mold cavities at the corresponding column positions.

[0005] Furthermore, the outer frame, horizontal partitions, and vertical partitions are all made of materials that resist thermal expansion and contraction.

[0006] Furthermore, the longitudinal spacers slide to connect and divide the outer frame and the transverse spacers; the lower template is equipped with a number of second linear actuators corresponding to the number of longitudinal spacers; the telescopic end of each second linear actuator is fixed to the corresponding longitudinal spacer, which is used to drive the longitudinal spacers to move up and down.

[0007] Furthermore, each punch core of the lower template consists of a protruding root structure and a cover plate structure; the protruding root structure is connected to the bottom of the lower template, and the cover plate structure is slidably connected to the top of the protruding root structure; each cover plate structure of the lower template is fixedly connected to a guide post, and the lower ends of all the guide posts penetrate downward through the lower template and are jointly fixedly connected to a linkage plate; a lifting driver is installed on the lower template, and the telescopic end of the lifting driver is fixedly connected to the linkage plate to drive the linkage plate to move up and down.

[0008] Furthermore, the guide pillars are designed as hollow tube structures; each cover plate structure has an air outlet structure that connects to the corresponding guide pillar hollow tube structure, and the air outlet structure is initially covered by the corresponding protruding root structure; all guide pillars are connected to a common manifold.

[0009] Furthermore, the upper template has a receiving groove that cooperates with the partition structure; a sealing baffle is slidably connected in the receiving groove of the upper template; a third linear actuator is installed on the upper template, and the telescopic end of the third linear actuator is fixed to the sealing baffle to drive the sealing baffle to move up and down.

[0010] Furthermore, the sealing baffle is equipped with a cooling chamber structure; one side of the sealing baffle is equipped with an inlet pipe that connects to the cooling chamber structure; and the other side of the sealing baffle is equipped with an outlet pipe that connects to the cooling chamber structure.

[0011] Furthermore, each concave cavity of the upper template has a downward-protruding rim around its perimeter.

[0012] Furthermore, each edge of the upper template has a chamfered structure at the connection point with the corresponding concave mold cavity.

[0013] Furthermore, the injection runner assembly consists of a main distributor and multiple output pipes; the main distributor is fixed to the upper mold plate and is used to connect to an external injection molding machine; the number of output pipes is the same as the number of horizontal rows of concave mold cavities, one output pipe corresponds to one concave mold cavity in the same vertical column, and multiple output pipes are all connected to the main distributor.

[0014] The beneficial effects of this invention: This invention provides a highly efficient demolding plastic shell injection molding device. After injection molding a single-piece shell (such as a mobile phone case) using a punch core in the lower mold and a concave mold cavity in the upper mold, the hot-state injection molded product is divided into multiple individual mobile phone case injection molded products before the raw material cools into the final injection molded product. The divided product is then separated into multiple individual mobile phone case injection molded products. Excess injection material is collected in the receiving groove of the upper mold, and the mobile phone case injection molded product is no longer a single-piece structure. During the demolding process, the individual mobile phone case injection molded products can be separated... The process allows for faster removal of the entire injection-molded phone case, preventing irregular tearing caused by localized adhesion to the mold core during removal. Furthermore, the phone case does not require further segmentation after cooling and demolding. During injection molding, longitudinal spacers can create multiple injection spaces, each using different colored injection molding materials, enabling simultaneous production of phone cases in various colors. This not only addresses the technical flaw of cracks appearing on the segmented surfaces of cooled, one-piece injection-molded products, affecting the overall aesthetics and tactile feel of individual phone cases, but also eliminates the need for trimming and chamfering after segmentation. Attached Figure Description

[0015] Figure 1 A schematic diagram illustrating the present invention.

[0016] Figure 2 This is a schematic diagram of the lower template for illustrating the present invention.

[0017] Figure 3 This is a schematic diagram illustrating the linkage plate of the present invention.

[0018] Figure 4 This is a schematic cross-sectional view of the lower template to illustrate the present invention.

[0019] Figure 5 This is a schematic diagram illustrating the guide post of the present invention.

[0020] Figure 6 This is a schematic diagram illustrating the punch core of the present invention.

[0021] Figure 7 This is a schematic diagram of the upper template for illustrating the present invention.

[0022] Figure 8 This is a schematic cross-sectional view of the upper template to illustrate the present invention.

[0023] Figure 9 To describe the present invention Figure 8 Schematic diagram of the sealing baffle at point C.

[0024] Figure 10 This is a schematic diagram illustrating the structure of the dividing outer frame, horizontal partitions, and vertical partitions of the present invention.

[0025] Reference numerals: 101-Frame, 102-Lifting drive mechanism, 200-Lower template, 201-Punch core, 202-Isolation groove, 2011-Protrusion root structure, 2012-Cover plate structure, 20120-Air vent structure, 210-Divided outer frame, 220-Transverse partition bar, 230-Vertical partition bar, 240-First linear actuator, 250-Second linear actuator, 260-Guide post, 270-Linkage plate, 280-Lifting actuator, 290-Diverter manifold, 300-Upper template, 301-Concave mold cavity, 302-Receiving groove, 303-Side edge, 310-Sealing baffle, 320-Third linear actuator, 330-Inlet pipe, 340-Outlet pipe, 400-Injection runner assembly, 410-Main distributor, 420-Outlet pipe. Detailed Implementation

[0026] The present invention will now be described in detail with reference to the accompanying drawings. The following embodiments use the mass injection molding of a typical plastic casing—a mobile phone case—as an example to illustrate the device.

[0027] Example 1: A high-efficiency demolding injection molding apparatus for plastic shells, such as... Figure 1 , Figure 2 , Figure 7 and Figure 10As shown, the assembly includes a frame 101, a lifting drive mechanism 102, a lower template 200, a dividing outer frame 210, horizontal spacers 220, vertical spacers 230, a first linear actuator 240, a second linear actuator 250, an upper template 300, and an injection runner assembly 400. The lower template 200 is fixedly connected to the frame 101; the lower template 200 has three horizontal rows and three vertical columns of punch cores 201 arranged in a matrix at equal intervals, that is, in this embodiment, there are a total of nine punch cores 201, and the lower template 200 has isolation grooves 202 for separating adjacent punch cores 201. A dividing frame 210 is slidably connected within the isolation groove 202 of the lower mold plate 200, and all punch cores 201 are surrounded by the dividing frame 210. Two transverse spacers 220 are fixedly connected at equal intervals on the dividing frame 210, and the transverse spacers 220 are slidably connected to the isolation groove 202. Two longitudinal spacers 230 are slidably connected at equal intervals on the dividing frame 210, and the longitudinal spacers 230 are simultaneously slidably connected to the transverse spacers 220 and the isolation groove 202. The dividing frame 210, all transverse spacers 220, and all longitudinal spacers 230 together form a dividing partition structure for dividing the injection molded product. Four first linear actuators 240 are symmetrically installed at the four corners of the bottom of the lower template 200. Their telescopic ends are all fixed to the dividing outer frame 210, which is used to drive the dividing outer frame 210 to move up and down along the isolation groove 202. Two second linear actuators 250 are installed along the column direction at the bottom of the lower template 200. The telescopic ends of the two second linear actuators 250 are respectively fixed to the corresponding longitudinal spacers 230, which are used to independently drive the longitudinal spacers 230 to move up and down. A lifting drive mechanism 102 is installed on the frame 101. The lifting component of the lifting drive mechanism 102 is fixed to the upper template 300. The upper template 300 has nine concave mold cavities 301, the number and position of which correspond one-to-one with the punch core 201. After the mold is closed, the punch core 201 and the concave mold cavity 301 form the injection cavity of the mobile phone shell. The top of the upper mold plate 300 is connected to three injection runner assemblies 400, the number of which corresponds to the number of columns of the concave mold cavities 301. Each injection runner assembly 400 is externally connected to an injection molding machine, and each injection runner assembly 400 is connected to the three concave mold cavities 301 in the corresponding column. The above embodiment only shows the arrangement of three rows and three columns of punch cores 201 and concave mold cavities 301; other numbers are not listed.

[0028] The outer frame 210, the transverse spacers 220, and the longitudinal spacers 230 are all made of glass fiber reinforced polypropylene. Glass fiber reinforced polypropylene has excellent resistance to thermal expansion and contraction. During the process of the injection molding raw material cooling into the injection molded product, the outer frame 210, the transverse spacers 220, and the longitudinal spacers 230 made of glass fiber reinforced polypropylene will not shrink, ensuring stable segmentation accuracy.

[0029] like Figures 3-6As shown, each punch core 201 of the lower template 200 consists of a protrusion root structure 2011 and a cover plate structure 2012. The protrusion root structure 2011 is connected to the bottom of the lower template 200, and the cover plate structure 2012 is slidably connected to the top of the protrusion root structure 2011. Each cover plate structure 2012 of the lower template 200 is fixedly connected to a guide post 260. The lower ends of all guide posts 260 penetrate downward through the lower template 200 and are jointly fixedly connected to a linkage plate 270. Two lifting drivers 280 are installed at the bottom of the lower template 200. The telescopic ends of the two lifting drivers 280 are jointly fixedly connected to the linkage plate 270, which is used to drive the linkage plate 270 to move all guide posts 260 and cover plate structures 2012 up and down synchronously. Specifically, the raised root structure 2011 is integrally formed in the bottom of the lower template 200, and its top is provided with an annular guide groove (not shown) along the circumferential direction; the bottom of the cover plate structure 2012 is provided with a matching annular boss (not shown), which is slidably connected to the top of the raised root structure 2011 through the cooperation of the boss and the guide groove, and can only slide in the up and down direction.

[0030] Furthermore, each guide post 260 is a hollow tube structure, and each cover plate structure 2012 has multiple vent structures 20120 on its four sides. The outer port of the vent structure 20120 is initially (before demolding) covered by the side wall of the corresponding protruding root structure 2011, and the inner port of the vent structure 20120 is connected to the hollow tube structure of the corresponding guide post 260. All guide posts 260 are connected to a common manifold 290, and the manifold 290 is externally connected to a hot air delivery device.

[0031] like Figures 7-10 As shown, the upper template 300 has a receiving groove 302 that adapts to the partition structure composed of the outer frame 210, the transverse partition 220, and the longitudinal partition 230. Its shape and size are perfectly matched to the partition structure, and it is used to store the partition structure when the mold is closed. A sealing baffle 310 is slidably connected in the receiving groove 302 of the upper template 300, and the sealing baffle 310 is initially located at the bottom of the receiving groove 302. Four third linear actuators 320 are installed at the four corners of the top of the upper template 300. The telescopic ends of the four third linear actuators 320 are fixed to the sealing baffle 310, and are used to drive the sealing baffle 310 to move up and down.

[0032] Furthermore, each concave cavity 301 of the upper template 300 has a downwardly protruding rim 303 around its perimeter, and each strip structure of the sealing baffle 310 is surrounded by two adjacent rims 303. During the splitting process, when excess injection molding material is pushed into the receiving groove 302 of the upper template 300 by the splitting frame 210, the transverse spacer 220 and the longitudinal spacer 230, the splitting partition structure (splitting frame 210, transverse spacer 220 and longitudinal spacer 230) cooperates with the corresponding rims 303 to completely cut off the excess injection molding material from the remaining injection molding material (molding injection material), thus avoiding adhesion between the two. Each edge 303 of the upper template 300 and the corresponding concave mold cavity 301 are provided with a chamfer structure, so that the injection molding product with the corresponding chamfer structure can be injection molded in the top edge area of ​​the part of the injection molding material located in the concave mold cavity 301. This not only eliminates the need to trim the edges of the segmented injection molding product, but also eliminates the need to chamfer the top edge area of ​​the segmented injection molding product, thus improving production efficiency.

[0033] The workflow of this embodiment is as follows: First, the injection molding process of the high-efficiency demolding plastic shell injection molding device of this embodiment is carried out. The lifting drive mechanism 102 drives the upper template 300 downward to fit tightly against the lower template 200. The external injection molding machine injects injection material between the punch core 201 of the lower template 200 and the concave mold cavity 301 of the upper template 300 through the injection runner assembly 400. The injection material forms a mobile phone shell shape according to the shape of the punch core 201 and the concave mold cavity 301. Adjacent mobile phone shell shaped injection materials form an integrated structure according to the shape of the isolation groove 202. After the injection molding process is completed, the external injection molding machine stops working, and the injection material connected between the punch core 201 and the concave mold cavity 301 gradually cools and solidifies to form an integrated mobile phone shell injection molded product.

[0034] Next, the segmentation process of the high-efficiency demolding plastic shell injection molding device of this embodiment is carried out. Before the injection molding material between the punch core 201 and the concave mold cavity 301 has completely cooled and solidified, the injection molding material is in a warm state with plasticity. The first linear actuator 240 and the second linear actuator 250 jointly push the segmentation frame 210, the horizontal spacer 220 and the vertical spacer 230 to rise synchronously. The segmentation partition structure (segmentation frame 210, horizontal spacer 220 and vertical spacer 230) segments the connected injection molding material, realizing the segmentation of the one-piece mobile phone shell injection molding product into multiple mobile phone shell injection molding product units. During the segmentation process, the segmentation frame 210, the horizontal spacer 220 and the vertical spacer 230 push the adjacent mobile phone shells. The integral structure between the injection molding materials of different shapes is extruded upwards; simultaneously, the third linear actuator 320 pulls the sealing baffle 310 upwards along the receiving groove 302 of the upper mold plate 300, making room for excess injection molding material. The dividing partition structure pushes the extruded excess injection molding material upwards into the receiving groove 302 of the upper mold plate 300, and the dividing partition structure, together with the surrounding edge 303, completely cuts off the excess injection molding material from the rest of the injection molding material. Therefore, the dividing partition structure flattens the four sides of the phone case injection molding product unit into a complete planar structure, and no excess edge structure is generated in the four sides of the phone case injection molding product unit. After the phone case injection molding product unit is demolded, there is no need to trim the excess edge on the phone case injection molding product unit. During the dividing process, the first linear actuator 240 pushes the dividing outer frame 210 and the horizontal partition 220 fixed thereon to rise; the vertical partition 230 can be driven to rise independently by the second linear actuator 250, or it can rise together with the dividing outer frame 210.

[0035] Finally, the demolding process of the high-efficiency demolding plastic shell injection molding device of this embodiment is carried out. After the injection material between the punch core 201 and the concave mold cavity 301 is completely cooled and fixed to form the mobile phone shell injection product, the mobile phone shell injection product is in a single unit state that has been segmented. The lifting drive mechanism 102 drives the upper mold plate 300 upward away from the lower mold plate 200, and at the same time the third linear drive 320 pushes the sealing baffle 310 downward to push the excess injection material downward. The staff cleans up the excess injection material in time. Simultaneously, the lifting driver 280 pulls the linkage plate 270 upwards, and the linkage plate 270 pushes the guide post 260 to move the cover plate structure 2012 of the punch core 201 upwards, so that the vent structure 20120 of the cover plate structure 2012 aligns with the inner side of the injection molded mobile phone shell on the punch core 201. Subsequently, the external hot air delivery equipment blows hot air outwards through the manifold 290, the guide post 260, and the vent structure 20120 of the cover plate structure 2012. The temperature of the hot air is controlled between 80℃ and 120℃, the pressure is 0.3-0.6MPa, and the flow rate is 10-30L / min. The cover plate structure 2012 and the protrusion root structure 2011 adopt a precision clearance fit, with a single-sided clearance of 0.02-0.05mm, and a high-temperature resistant silicone rubber sealing ring is provided on the sliding surface. When the cover plate structure 2012 is sealed, it effectively prevents the injection molten metal from penetrating. The hot airflow can separate the inner wall of the injection molded phone case from the surface of the die core 201 from the inside out; and the injection molded phone case is no longer a single piece of integrated structure. During the demolding process, the individual pieces of the injection molded phone case can be removed more quickly, and there will be no irregular tearing of the entire injection molded phone case due to local areas adhering to the surface of the die core 201 during the removal process.

[0036] Furthermore, when it is necessary to use the high-efficiency demolding plastic shell injection molding device of this embodiment to simultaneously produce injection molded mobile phone shells of different colors: during the injection molding process, the three injection runner assemblies 400 are respectively connected to injection molding machines that transport injection molding raw materials of different colors; after the lifting drive mechanism 102 drives the upper mold plate 300 downward to tightly adhere to the lower mold plate 200, the second linear drive 250 first drives the longitudinal partition 230 upward, and the two longitudinal partitions 230 divide the overall injection space between the lower mold plate 200 and the upper mold plate 300 into three independent single-row injection spaces of different columns. The top and sides of the longitudinal partition 230 are provided with sealing strips that are tightly fitted to the upper mold plate 300 and the lower mold plate 200. The sealing strips are made of high-temperature resistant elastomer material and can withstand injection pressure and To prevent melt color mixing, each injection runner assembly 400 corresponds to a single-row injection space. Three external injection molding machines deliver three different colored injection molding materials to the three single-row injection spaces respectively. A time-sharing injection method is used during injection: the middle row is injected first, and after the holding pressure is completed, the side rows are injected sequentially. The injection pressure is 60-100 MPa, and the injection interval is 2-5 seconds. The corresponding colored injection molding material is injected between the punch core 201 and the cavity 301 in each injection space. Adjacent injection molding materials in each row are connected together. Then, following the above steps, the injection molding materials are sequentially divided and demolded, enabling the simultaneous production of three different colored mobile phone case injection molding products, with three of each color. Specifically, the division of the injection molding material in this embodiment includes: the first linear actuator 240 pushes the dividing frame 210 and the transverse spacer 220 upwards, working together with the pre-raised longitudinal spacer 230 to complete the division.

[0037] Example 2, as Figure 1 and Figures 7-9As shown, in this embodiment, based on embodiment 1, the sealing baffle 310 is provided with a cooling chamber structure; one side of the sealing baffle 310 is provided with an inlet pipe 330, which is connected to the cooling chamber structure and externally connected to the output port of the coolant circulation conveying equipment; the other side of the sealing baffle 310 is provided with an outlet pipe 340, which is connected to the cooling chamber structure and externally connected to the return port of the coolant circulation conveying equipment. After excess injection molding material is pushed into the receiving groove 302 of the upper mold plate 300 by the segmented outer frame 210, transverse spacers 220 and longitudinal spacers 230, during the subsequent demolding process, the external coolant circulation conveying equipment continuously delivers coolant to the cooling chamber structure in the sealing baffle 310 through the inlet pipe 330 and outlet pipe 340. The coolant is water or a water-glycol mixture, with a temperature of 5-15℃, a flow rate of 5-15L / min, and a cooling time of 10-30 seconds. The coolant cools the excess injection molding material in the receiving groove 302 through the sealing baffle 310, cooling it into a whole sheet of injection molding material. During the process of the lifting drive mechanism 102 driving the upper template 300 to rise and leave the lower template 200, the third linear drive 320 directly pushes the sealing baffle 310 downward, which can control the sealing baffle 310 to push out the whole sheet of injection molding material at one time. At this time, the staff can easily remove the sheet of injection molding material, so that the excess injection molding material can be cleaned up more conveniently, greatly improving the convenience of cleaning.

[0038] Example 3, as Figure 1 , Figure 2 , Figure 7 and Figure 8As shown, based on Embodiment 1, each injection runner assembly 400 in this embodiment consists of a main distributor 410 and multiple output pipes 420. The main distributor 410 is fixed to the upper mold plate 300 and is connected to three output pipes 420. Each output pipe 420 is connected to a concave mold cavity 301 in the same column (e.g., there are three concave mold cavities 301 in the column), and all output pipes 420 are connected to the main distributor 410. The main distributor 410 of the injection runner assembly 400 is externally connected to an injection molding machine. The injection molding machine delivers injection molding material to each output pipe 420 through the main distributor 410. The injection molding material is delivered to the corresponding concave mold cavity 301 through each output pipe 420, which increases the number of injection molding material output ports and improves the injection molding material filling efficiency. It also makes the feed runner length and resistance of each cavity in the same column basically the same, realizes balanced cavity filling, effectively improves the size and performance consistency of products from the same mold, and further improves the injection molding efficiency. Furthermore, since the number of injection runner components 400 (main distributors 410) is the same as the number of columns of concave mold cavities 301, and the output pipes 420 in the same column are dedicated to the main distributors 410 in the same column, injection molding machines with different colored raw materials can be directly connected to different main distributors 410 to achieve simultaneous batch injection molding of three colors with "one color per column". This avoids mixing of different colored raw materials and does not require additional modification to the equipment structure, greatly improving the convenience and accuracy of three-color production.

[0039] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the scope of protection of the present invention. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the essence and scope of the technical solutions of the present invention.

Claims

1. A high-efficiency demolding plastic shell injection molding device, comprising a frame (101); a lower template (200) is fixedly connected to the frame (101); a plurality of horizontal and vertical punches (201) are arranged in a matrix at equal intervals on the lower template (200), and an isolation groove (202) is provided on the lower template (200) for separating adjacent punches (201). Its characteristics are: It also includes a dividing frame (210), which is slidably connected to the isolation groove (202) of the lower template (200); the dividing frame (210) is fixedly connected at equal intervals along the row direction with transverse spacers (220) one less than the number of rows of the punch core (201), and the transverse spacers (220) are slidably connected to the isolation groove (202); the dividing frame (210) is connected at equal intervals along the column direction with longitudinal spacers (230) one less than the number of columns of the punch core (201), and the longitudinal spacers (230) are slidably connected to the isolation groove (202); the dividing frame (210), all transverse spacers (220) and all longitudinal spacers (230) together form a dividing frame for dividing the injection molded product. The machine has a partition structure; a first linear actuator (240) is installed on the lower template (200) to drive the segmented outer frame (210) to move up and down; a lifting drive mechanism (102) is installed on the frame (101) above the lower template (200); the lifting component of the lifting drive mechanism (102) is fixedly connected to the upper template (300); the upper template (300) has concave mold cavities (301) in the number and position corresponding to the punch core (201); the upper template (300) is connected to an injection runner assembly (400) in the number corresponding to the number of columns of the concave mold cavities (301), and the injection runner assembly (400) is connected to the concave mold cavities (301) in the corresponding column position.

2. The high-efficiency demolding injection molding apparatus for plastic shells according to claim 1, characterized in that: The outer frame (210), the horizontal partition (220), and the vertical partition (230) are all made of materials that resist thermal expansion and contraction.

3. The high-efficiency demolding injection molding apparatus for plastic shells according to claim 1, characterized in that: The longitudinal partition (230) slides to connect the dividing frame (210) and the transverse partition (220); the lower template (200) is equipped with a number of second linear actuators (250) corresponding to the number of longitudinal partitions (230); the telescopic end of each second linear actuator (250) is fixed to the corresponding longitudinal partition (230) for driving the longitudinal partition (230) to move up and down.

4. The high-efficiency demolding injection molding apparatus for plastic shells according to claim 1, characterized in that: Each punch core (201) of the lower template (200) is composed of a protruding root structure (2011) and a cover plate structure (2012); the protruding root structure (2011) is connected to the bottom of the lower template (200), and the cover plate structure (2012) is slidably connected to the top of the protruding root structure (2011); each cover plate structure (2012) of the lower template (200) is fixedly connected to a guide post (260), and the lower ends of all guide posts (260) penetrate downward through the lower template (200) and are jointly fixedly connected to a linkage plate (270); a lifting driver (280) is installed on the lower template (200), and the telescopic end of the lifting driver (280) is fixedly connected to the linkage plate (270) to drive the linkage plate (270) to move up and down.

5. The high-efficiency demolding injection molding apparatus for plastic shells according to claim 4, characterized in that: The guide post (260) is a hollow tube structure; each cover plate structure (2012) is provided with an air outlet structure (20120) that connects to the corresponding guide post (260) and the air outlet structure (20120) is initially covered by the corresponding protruding root structure (2011); all guide posts (260) are connected by a common manifold (290).

6. The high-efficiency demolding injection molding apparatus for plastic shells according to claim 1, characterized in that: The upper template (300) has a receiving groove (302) which is matched with the partition structure; a sealing baffle (310) is slidably connected in the receiving groove (302) of the upper template (300); a third linear actuator (320) is installed on the upper template (300), and the telescopic end of the third linear actuator (320) is fixed to the sealing baffle (310) for driving the sealing baffle (310) to move up and down.

7. The high-efficiency demolding injection molding apparatus for plastic shells according to claim 6, characterized in that: The sealing baffle (310) is provided with a cooling chamber structure; one side of the sealing baffle (310) is provided with an inlet pipe (330) that connects to the cooling chamber structure; the other side of the sealing baffle (310) is provided with an outlet pipe (340) that connects to the cooling chamber structure.

8. The high-efficiency demolding injection molding apparatus for plastic shells according to claim 1, characterized in that: Each concave cavity (301) of the upper template (300) has a downwardly protruding rim (303) around its perimeter.

9. A high-efficiency demolding injection molding apparatus for plastic shells according to claim 8, characterized in that: Each edge (303) of the upper template (300) is provided with a chamfer structure at the connection between it and the corresponding concave mold cavity (301).

10. A high-efficiency demolding injection molding apparatus for plastic shells according to any one of claims 1-9, characterized in that: The injection runner assembly (400) consists of a main distributor (410) and multiple output pipes (420); The main distributor (410) is fixed to the upper template (300) for external injection molding machine connection; the number of output pipes (420) is the same as the number of concave mold cavities (301) in the horizontal row, one output pipe (420) is connected to one concave mold cavity (301) in the same vertical column, and multiple output pipes (420) are connected to the main distributor (410).

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