Plastic storage box injection mold

Abstract

The utility model belongs to the technical field of molds, and particularly relates to an injection mold for a plastic storage box. The storage box forming die comprises a storage box forming lower die and a storage box forming upper die. In the injection molding process, molten materials enter the cavity after being subjected to injection molding and shunting through the injection molding and shunting piece, the retraction type inclined stripping assembly is tightly attached to and matched with the outer side sliding block piece to be used for forming handle empty grooves in the two sides of the containing box, secondary machining is not needed, mold opening is conducted after injection molding is completed, and the mold opening efficiency is greatly improved. At the moment, the retraction type inclined stripping assembly retracts towards the protruding side of the forming middle section, the outer side sliding block piece moves outwards, the retraction type inclined stripping assembly and the outer side sliding block piece are separated from handle empty grooves formed in the two sides of the containing box, then the splicing type lengthened section forming boss is driven by the ejection connecting piece to move upwards, and the formed plastic part is ejected and demolded; according to the structure, on one hand, handle empty grooves formed in the two sides of the storage box cannot be damaged, on the other hand, the fluency of ejection demolding is high, and the structure is compact and reasonable.

Description

Technical Field

[0001] The utility model belongs to the technical field of molds and relates to an injection mold for a plastic storage box. Background Art

[0002] Plastic storage boxes are mainly used for classifying and storing clothes in home life, and are integrally injection-molded by an injection mold. Generally, handle grooves are provided on both sides of the plastic storage boxes on the market for installing handles to facilitate handling. At present, the following problems occur when most storage box molds form handle grooves during injection molding: 1. After the handle grooves are formed synchronously during injection molding, the handle grooves of the storage box are easily damaged during the mold opening and demolding process; 2. When the plastic part is ejected and demolded, the handle groove structure of the storage box is prone to jamming with the mold, resulting in poor demolding smoothness. Therefore, there is an urgent need to design an injection mold for a plastic storage box that can overcome the above defects.

[0003] In order to overcome the deficiencies of the prior art, people have continuously explored and proposed various solutions. For example, a Chinese patent discloses an injection mold for a storage box [Application No.: 201821062912.1], which includes a fixed template. A molding groove is opened in the middle of the top of the fixed template. A partition is slidably connected inside the molding groove. Fixing plates are fixed on both sides of the bottom of the partition. Rotating rods are hinged on both sides of the fixing plates. A first motor is installed at the bottom of one side of the fixed template. The output shaft of the first motor is fixed with a bidirectional threaded rod. Two groups of moving plates are threadedly connected to the bidirectional threaded rod. The bottom end of the rotating rod is hinged to one side of the moving plate. Support columns are fixed around the top of the fixed template. A lifting plate is slidably connected to the support columns. Four groups of guide rods are symmetrically fixed to the bottom of the lifting plate. A movable plate is slidably connected to the guide rods. Summary of the Utility Model

[0004] The purpose of the utility model is to provide an injection mold for a plastic storage box for the above problems.

[0005] To achieve the above purpose, the utility model adopts the following technical solutions:

[0006] An injection mold for a plastic storage box, comprising a lower mold for forming the storage box and an upper mold for forming the storage box. An injection shunt member is provided above the upper mold for forming the storage box. A middle-section convexity for forming is provided on the lower mold for forming the storage box. A spliced extended-section forming convex platform is provided on the top of the middle-section convexity for forming. A concave cavity for forming the storage box is provided inside the upper mold for forming the storage box. The middle-section convexity for forming, the spliced extended-section forming convex platform and the concave cavity for forming the storage box form a complete cavity. Outer slider members that can move closer to or away from one end of the middle-section convexity for forming are provided on both sides of the lower mold for forming the storage box. A retractable inclined ejection assembly is provided inside the middle-section convexity for forming. The retractable inclined ejection assembly is arranged opposite to the outer slider members. A top ejection connecting member that penetrates through the middle-section convexity for forming and is connected to the bottom of the spliced extended-section forming convex platform is provided below the lower mold for forming the storage box.

[0007] In the above-mentioned injection mold for a plastic storage box, the retractable inclined ejection assembly includes an inner inclined ejection slider provided inside the middle-section convexity for forming. Two alignment shaft bodies symmetrically arranged along the center line of the inner inclined ejection slider are provided on the outer side of the inner inclined ejection slider. The inner inclined ejection slider is arranged opposite to the outer slider members.

[0008] In the above-mentioned injection mold for a plastic storage box, a slider connecting member inside the mold that can perform reciprocating linear motion in the vertical direction is provided inside the middle-section convexity for forming. The slider connecting member inside the mold is in sliding fit with the inner inclined ejection slider.

[0009] In the above-mentioned injection mold for a plastic storage box, an inner sliding table is provided inside the slider connecting member inside the mold. An inclined groove is provided inside the inner sliding table. The inner side of the inner inclined ejection slider extends into the inclined groove and is in sliding fit with the inclined groove.

[0010] In the above-mentioned injection mold for a plastic storage box, an oil cylinder is provided inside the middle-section convexity for forming. The power shaft of the oil cylinder is connected to the inner sliding table.

[0011] In the above-mentioned injection mold for a plastic storage box, the outer slider members include outer forming sliders provided on both sides of the lower mold for forming the storage box. The outer forming sliders are arranged opposite to the inner inclined ejection slider.

[0012] In the above-mentioned injection mold for a plastic storage box, two alignment shaft body holes symmetrically arranged along the center line of the inner inclined ejection slider are provided inside the inner inclined ejection slider. The alignment shaft body holes are in snap-fit with the alignment shaft bodies.

[0013] In the above-mentioned injection mold for a plastic storage box, the top ejection connecting member includes a top ejection fixing plate provided below the lower mold for forming the storage box. A bottom ejector rod and an extended-section ejector rod are provided inside the top ejection fixing plate. The extended-section ejector rod is connected to the bottom of the spliced extended-section forming convex platform.

[0014] In the above-mentioned injection mold for a plastic storage box, the extended-section ejector rod and the inner sliding table are arranged in a staggered manner.

[0015] In the above-mentioned injection mold for plastic storage boxes, the injection shunt part includes an injection main board and an injection shunt board arranged above the upper mold for forming the storage box.

[0016] Compared with the existing technology, the advantages of the present utility model are as follows:

[0017] 1. During the injection molding process of the present utility model, the lower mold for forming the storage box and the upper mold for forming the storage box are brought closer to each other, and the middle forming protrusion, the spliced extended forming boss, and the concave cavity for forming the storage box form a complete cavity. The molten material enters the cavity after being injection-shunted by the injection shunt part. The retractable oblique ejection assembly is closely fitted with the outer slider part to form the handle empty grooves on both sides of the storage box without the need for secondary processing. After the injection molding is completed, the mold is opened. At this time, the retractable oblique ejection assembly is retracted towards the middle forming protrusion side, and the outer slider part moves outwards, disengaging the retractable oblique ejection assembly and the outer slider part from the handle empty grooves formed on both sides of the storage box. Then, the spliced extended forming boss is driven to move upwards by the ejection connecting part to eject and demold the molded plastic part. This structure can, on the one hand, ensure that the handle empty grooves formed on both sides of the storage box will not be damaged, and on the other hand, the ejection and demolding have high smoothness and the structure is compact and reasonable.

[0018] 2. The present utility model can move the inner sliding table, and through the sliding cooperation between the inner oblique ejection slider and the inclined groove, the retraction or outward movement of the inner oblique ejection slider can be realized.

[0019] Other advantages, objectives, and features of the present utility model will be partially reflected by the following description and partially understood by those skilled in the art through the research and practice of the present utility model. Description of the Drawings

[0020] Figure 1 is the structural schematic diagram of the present utility model.

[0021] Figure 2 is the partial structural schematic diagram of the present utility model.

[0022] Figure 3 is the partial structural schematic diagram of the present utility model in another direction.

[0023] Figure 4 is the partial structural schematic diagram of the present utility model in another direction.

[0024] Figure 5 is the structural schematic diagram of the upper mold for forming the storage box.

[0025] In the figure: the lower mold 1 for forming the storage box, the upper mold 2 for forming the storage box, the injection molding shunt part 3, the middle section forming convex 4, the spliced extended section forming convex platform 5, the concave cavity 6 for forming the storage box, the outer slider part 7, the retractable inclined ejection component 8, the ejection connecting part 9, the inner inclined ejection slider 10, the alignment shaft body 11, the in-mold slider connecting part 111, the inner sliding table 12, the inclined groove 13, the oil cylinder 14, the outer forming slider 15, the alignment shaft body hole 16, the ejection fixing plate 17, the bottom ejector rod 18, the extended section ejector rod 19, the injection molding main board 20, the injection molding shunt board 21. Specific embodiments

[0026] The present utility model will be further described below with reference to the accompanying drawings.

[0027] As Figures 1-5 shown, an injection mold for a plastic storage box includes a lower mold 1 for forming the storage box and an upper mold 2 for forming the storage box. An injection molding shunt part 3 is provided above the upper mold 2 for forming the storage box. A middle section forming convex 4 is provided on the lower mold 1 for forming the storage box. A spliced extended section forming convex platform 5 is provided at the top of the middle section forming convex 4. A concave cavity 6 for forming the storage box is provided inside the upper mold 2 for forming the storage box. The middle section forming convex 4, the spliced extended section forming convex platform 5 and the concave cavity 6 for forming the storage box form a complete cavity. Outer slider parts 7 that can move closer to or away from one end of the middle section forming convex 4 are provided on both sides of the lower mold 1 for forming the storage box. A retractable inclined ejection component 8 is provided inside the middle section forming convex 4. The retractable inclined ejection component 8 is arranged opposite to the outer slider parts 7. An ejection connecting part 9 that penetrates through the middle section forming convex 4 and is connected to the bottom of the spliced extended section forming convex platform 5 is provided below the lower mold 1 for forming the storage box.

[0028] In this embodiment, during the injection molding process, the lower mold 1 for forming the storage box and the upper mold 2 for forming the storage box are moved closer to each other. The middle section forming convex 4, the spliced extended section forming convex platform 5 and the concave cavity 6 for forming the storage box form a complete cavity. The molten material enters the cavity after being injection-molded and shunted by the injection molding shunt part 3. The retractable inclined ejection component 8 and the outer slider parts 7 are closely fitted to form the handle empty grooves on both sides of the storage box, without the need for secondary processing. After the injection molding is completed, the mold is opened. At this time, the retractable inclined ejection component 8 is retracted towards one side of the middle section forming convex 4, and the outer slider parts 7 move outwards, separating the retractable inclined ejection component 8 and the outer slider parts 7 from the handle empty grooves formed on both sides of the storage box. Then, the spliced extended section forming convex platform 5 is driven by the ejection connecting part 9 to move upwards to eject and demold the molded plastic part. This structure can, on the one hand, ensure that the handle empty grooves formed on both sides of the storage box are not damaged, and on the other hand, has a high smoothness of ejection and demolding, and the structure is compact and reasonable.

[0029] Combined with Figures 1-5As shown, the retractable inclined ejection assembly 8 includes an inner inclined ejection slider 10 disposed within the middle section protrusion 4 of the mold. Two alignment shafts 11 symmetrically arranged along the center line of the inner inclined ejection slider 10 are provided on the outer side of the inner inclined ejection slider 10. The inner inclined ejection slider 10 is disposed opposite to the outer slider member 7.

[0030] Specifically, during the injection molding process, the alignment shafts 11 of the inner inclined ejection slider 10 are inserted into the outer slider member 7 to achieve a snap-fit, for forming the handle slots on both sides of the storage box, without the need for secondary processing.

[0031] A mold-internal slider connecting member 111 capable of reciprocating linearly in the vertical direction is provided within the middle section protrusion 4 of the mold. The mold-internal slider connecting member 111 is slidably engaged with the inner inclined ejection slider 10.

[0032] In this embodiment, when it is necessary to retract or move the inner inclined ejection slider 10 outward, the mold-internal slider connecting member 111 is moved.

[0033] Combined with Figure 3 、 Figure 4 As shown, an inner sliding table 12 is provided within the mold-internal slider connecting member 111. An inclined slot 13 is provided within the inner sliding table 12. The inner side of the inner inclined ejection slider 10 extends into the inclined slot 13 and is slidably engaged with the inclined slot 13.

[0034] In this embodiment, by moving the inner sliding table 12, through the sliding engagement between the inner inclined ejection slider 10 and the inclined slot 13, the retraction or outward movement of the inner inclined ejection slider 10 can be achieved.

[0035] An oil cylinder 14 is provided within the middle section protrusion 4 of the mold. The power shaft of the oil cylinder 14 is connected to the inner sliding table 12.

[0036] In this embodiment, the inner sliding table 12 is driven by the oil cylinder 14, with a relatively high degree of automation.

[0037] Combined with Figures 3-4 As shown, the outer slider member 7 includes outer molding sliders 15 disposed on both sides of the lower mold 1 for forming the storage box. The outer molding sliders 15 are disposed opposite to the inner inclined ejection slider 10. Two alignment shaft holes 16 symmetrically arranged along the center line of the inner inclined ejection slider 10 are provided within the inner inclined ejection slider 10. The alignment shaft holes 16 are snap-fitted with the alignment shafts 11.

[0038] In this embodiment, during the injection molding process, the alignment shaft holes 16 within the inner inclined ejection slider 10 are snap-fitted with the alignment shafts 11, causing the inner inclined ejection slider 10 to be in close contact with the outer molding sliders 15, for forming the handle slots on both sides of the storage box, without the need for secondary processing.

[0039] Combined with Figures 1-5As shown, the ejection connecting member 9 includes an ejection fixing plate 17 arranged below the storage box forming lower mold 1, and the ejection fixing plate 17 is provided with a bottom ejector rod 18 and an extended section ejector rod 19, and the extended section ejector rod 19 is connected to the bottom of the spliced extended section forming boss 5.

[0040] In this embodiment, the ejector fixing plate 17 is used to fix the connection between the bottom ejector rod 18 and the extended ejector rod 19. After the injection molding is completed, the ejector fixing plate 17 moves upward, driving the bottom ejector rod 18, the extended ejector rod 19 and the spliced extended molding boss 5 to move synchronously, and the molded plastic part is ejected and demolded.

[0041] Combination Figures 1-5 As shown, the extended section top rod 19 and the inner slide 12 are arranged alternately.

[0042] In this embodiment, the extended section push rod 19 and the inner slide table 12 are arranged alternately without interfering with each other, and the structure is reasonable.

[0043] Combination Figures 1-2 As shown, the injection molding diverter 3 includes an injection molding main board 20 and an injection molding diverter plate 21 which are arranged above the storage box molding upper mold 2.

[0044] In this embodiment, during injection molding, the molten material is injection-divided through the injection molding main board 20 and the injection molding diverter plate 21 and injected into the mold cavity.

[0045] The working principle of the utility model is:

[0046] During the injection molding process, the storage box molding lower mold 1 and the storage box molding upper mold 2 are brought close to each other, and the molding middle section protrusion 4, the spliced extension section molding boss 5 and the storage box molding cavity 6 form a complete cavity, and the molten material is injection-molded and diverted through the injection molding main board 20 and the injection molding diverter plate 21. The alignment shaft body hole 16 in the inner oblique sliding block 10 is snap-fitted with the alignment shaft body 11, so that the inner oblique sliding block 10 is tightly attached to the outer molding sliding block 15 to form the handle slots on both sides of the storage box. No secondary processing is required. After the injection molding is completed, the mold is opened, and the inner slide 12 is moved at this time. The sliding cooperation between the inner oblique release slider 10 and the oblique groove 13 can realize the retraction of the inner oblique release slider 10, and the outer molding slider 15 moves outward to separate the inner oblique release slider 10 and the outer molding slider 15 from the handle slots formed on both sides of the storage box, and then the ejection fixing plate 17 is moved upward to drive the bottom ejector rod 18 and the extended section ejector rod 19 and the spliced extended section molding boss 5 to move synchronously, so as to eject and demold the molded plastic part. On the one hand, this structure can ensure that the handle slots formed on both sides of the storage box will not be damaged, and on the other hand, the ejection and demolding are smooth, compact and reasonable in structure.

[0047] The inner sliding table 12 is driven by the oil cylinder 14, with a relatively high degree of automation. The lengthened ejector rod 19 and the inner sliding table 12 are arranged staggeredly without interfering with each other, and the structure is reasonable.

[0048] The specific embodiments described herein are merely illustrative of the spirit of the present utility model. Those skilled in the art to which the present utility model pertains can make various modifications or supplements to the described specific embodiments or use similar ways of substitution, but will not deviate from the spirit of the present utility model.

[0049] Although terms such as the lower die 1 for forming the storage box, the upper die 2 for forming the storage box, the injection molding splitter 3, the middle section forming protrusion 4, the spliced lengthened section forming boss 5, the storage box forming cavity 6, the outer slider member 7, the retractable inclined ejection assembly 8, the ejection connecting member 9, the inner inclined ejection slider 10, the alignment shaft body 11, the in-mold slider connecting member 111, the inner sliding table 12, the inclined groove 13, the oil cylinder 14, the outer forming slider 15, the alignment shaft body hole 16, the ejection fixing plate 17, the bottom ejector rod 18, the lengthened ejector rod 19, the injection molding main board 20, the injection molding splitter board 21 are used more frequently in this article, the possibility of using other terms is not excluded. Using these terms is only for more conveniently describing and explaining the essence of the present utility model, and interpreting them as any additional limitation is contrary to the spirit of the present utility model.

Claims

1. An injection mold for a plastic storage box, comprising a lower mold (1) for forming the storage box and an upper mold (2) for forming the storage box, characterized in that, Above the upper mold (2) for forming the storage box, there is an injection molding shunt part (3). On the lower mold (1) for forming the storage box, there is a middle forming convexity (4). At the top of the middle forming convexity (4), there is a spliced extended section forming boss (5). Inside the upper mold (2) for forming the storage box, there is a storage box forming cavity (6). The middle forming convexity (4), the spliced extended section forming boss (5) and the storage box forming cavity (6) form a complete cavity. On both sides of the lower mold (1) for forming the storage box, there are outer slider parts (7) that can move close to or away from one end of the middle forming convexity (4). Inside the middle forming convexity (4), there is a retractable oblique ejection component (8). The retractable oblique ejection component (8) is arranged opposite to the outer slider parts (7). Below the lower mold (1) for forming the storage box, there is an ejection connecting part (9) that penetrates through the middle forming convexity (4) and is connected to the bottom of the spliced extended section forming boss (5).

2. The plastic storage box injection mold according to claim 1, characterized in that, The retractable oblique ejection component (8) includes an inner oblique ejection slider (10) arranged inside the middle forming convexity (4). On the outer side of the inner oblique ejection slider (10), there are two alignment shaft bodies (11) symmetrically arranged along the center line of the inner oblique ejection slider (10). The inner oblique ejection slider (10) is arranged opposite to the outer slider parts (7).

3. The plastic storage box injection mold according to claim 2, characterized in that, Inside the middle forming convexity (4), there is an in-mold slider connecting part (111) that can perform reciprocating linear motion in the vertical direction. The in-mold slider connecting part (111) is in sliding fit with the inner oblique ejection slider (10).

4. The plastic storage box injection mold according to claim 3, wherein, Inside the in-mold slider connecting part (111), there is an inner sliding table (12). Inside the inner sliding table (12), there is an inclined groove (13). The inner side of the inner oblique ejection slider (10) extends into the inclined groove (13) and is in sliding fit with the inclined groove (13).

5. The plastic storage box injection mold according to claim 4, characterized in that, Inside the middle forming convexity (4), there is an oil cylinder (14). The power shaft of the oil cylinder (14) is connected to the inner sliding table (12).

6. The injection mold for a plastic storage box according to claim 5, characterized in that, The outer slider parts (7) include outer forming sliders (15) arranged on both sides of the lower mold (1) for forming the storage box. The outer forming sliders (15) are arranged opposite to the inner oblique ejection slider (10).

7. The injection mold for the plastic storage box according to claim 6, characterized in that, Inside the inner oblique ejection slider (10), there are two alignment shaft body holes (16) symmetrically arranged along the center line of the inner oblique ejection slider (10). The alignment shaft body holes (16) are in snap-fit with the alignment shaft bodies (11).

8. The plastic storage box injection mold according to claim 7, characterized in that, The ejection connecting part (9) includes an ejection fixed plate (17) arranged below the lower mold (1) for forming the storage box. Inside the ejection fixed plate (17), there are a bottom ejector rod (18) and an extended section ejector rod (19). The extended section ejector rod (19) is connected to the bottom of the spliced extended section forming boss (5).

9. The plastic storage box injection mold according to claim 8, wherein, The extended section ejector rod (19) and the inner sliding table (12) are arranged staggeredly.

10. The plastic storage box injection mold according to claim 9, characterized in that, The injection molding shunt part (3) includes an injection molding main board (20) and an injection molding shunt board (21) arranged above the upper mold (2) for forming the storage box.

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