Injection mold for power battery plastic trays based on changeable inner liner technology

Abstract

This utility model belongs to the field of mold technology and relates to an injection mold for a power battery plastic tray based on a shape-changing inner liner technology. This utility model includes a lower mold and an upper mold for forming the plastic tray. An injection main board is provided above the upper mold. The upper mold contains an injection flow divider and an upper tray forming component. The lower mold contains a tray hole and groove synchronous forming structure, which corresponds in position and shape to the upper tray forming component. This utility model, by setting a direct ejector, with the direct ejector rod slidingly engaging with the lower hollow groove forming protrusion, and the sleeve screw hole forming rod facing the hollow sleeve forming cavity, can effectively eject the plastic tray during demolding, greatly improving demolding efficiency and reducing the damage rate of the product during demolding.

Description

Technical Field

[0001] This utility model belongs to the field of mold technology and relates to an injection mold for a power battery plastic tray based on the technology of changing inner liner. Background Technology

[0002] With the rapid development of the new energy vehicle industry, the demand for power batteries is increasing daily. As a crucial component of the battery system, the quality and production efficiency of power battery plastic trays are vital to the entire battery industry. Traditional injection molds for producing power battery plastic trays often suffer from problems such as complex structures, difficult demolding, and low tray precision, making it difficult to meet the growing market demand. Furthermore, the poor versatility of molds when producing different tray models necessitates frequent mold replacements, significantly increasing production costs. Therefore, developing an injection mold for power battery plastic trays based on mold-changing inner liner technology that can overcome these shortcomings, improve production efficiency and product quality, and reduce production costs is of significant practical importance. Summary of the Invention

[0003] The purpose of this invention is to address the above-mentioned problems by providing an injection mold for a power battery plastic tray based on a shape-changing inner liner technology.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A power battery plastic tray injection mold based on a change-up liner technology includes a lower plastic tray forming mold and an upper plastic tray forming mold. An injection main board is located above the upper plastic tray forming mold. An injection flow divider and an upper tray forming assembly are located within the upper plastic tray forming mold. A tray hole and groove synchronous forming structure is located within the lower plastic tray forming mold. The synchronous forming structure corresponds in position and shape to the upper tray forming assembly. A straight ejector is located below the lower plastic tray forming mold and can reciprocate linearly in the vertical direction. The straight ejector corresponds in position to the synchronous forming structure.

[0006] In the above-mentioned power battery plastic tray injection mold based on the replacement liner technology, the tray hole and groove synchronous forming structure includes several lower forming auxiliary cavities disposed in the lower mold of the plastic tray forming. Several lower hollow groove forming protrusions are provided in the lower forming auxiliary cavities, wherein two lower hollow groove forming protrusions have two hollow sleeve forming cavities.

[0007] In the aforementioned injection mold for a power battery plastic tray based on the change-of-shape liner technology, a recessed stepped body forming cavity is formed between the lower forming auxiliary chamber and the lower hollow groove forming protrusion.

[0008] In the above-mentioned injection mold for a power battery plastic tray based on the change-up liner technology, the straight ejector includes an ejector fixing plate disposed below the lower mold of the plastic tray forming. The ejector fixing plate is provided with a plurality of straight ejector rods, which pass through the lower hollow groove forming protrusion and slide in cooperation with the lower hollow groove forming protrusion.

[0009] In the above-mentioned injection mold for a power battery plastic tray based on the changing inner liner technology, the ejector fixing plate is also provided with a sleeve screw hole forming rod, and a top cylinder is sleeved on the sleeve screw hole forming rod. The sleeve screw hole forming rod is arranged opposite to the hollow sleeve forming cavity.

[0010] In the aforementioned injection mold for a power battery plastic tray based on the change-of-shape liner technology, the sleeve screw hole forming rod and the straight push rod are arranged parallel to each other and staggered.

[0011] In the above-mentioned injection mold for a power battery plastic tray based on the change-of-liner technology, the upper forming component of the tray includes several upper forming auxiliary chambers disposed in the upper mold of the plastic tray forming. The upper forming auxiliary chambers have several panel through-hole forming protrusions, and the lower slot forming protrusions are arranged opposite to the panel through-hole forming protrusions.

[0012] In the above-mentioned injection mold for a power battery plastic tray based on the change-of-shape liner technology, the upper molding auxiliary cavity has a recessed step forming protrusion, and the recessed step forming protrusion corresponds to the position of the recessed step forming cavity and the shape is matched.

[0013] In the above-mentioned injection mold for a power battery plastic tray based on the change-up liner technology, the upper molding auxiliary cavity also has a hollow sleeve molding shaft, which is arranged opposite to the hollow sleeve molding cavity.

[0014] In the above-mentioned injection mold for a power battery plastic tray based on the change-of-line technology, the injection diversion part includes a diversion channel disposed in the upper mold of the plastic tray forming, and the diversion channel is connected to the upper forming auxiliary chamber.

[0015] Compared with existing technologies, the advantages of this utility model are:

[0016] 1. This utility model, by setting a straight ejector, with the straight ejector rod slidingly engaging with the lower hollow groove forming protrusion, and the sleeve screw hole forming rod facing the hollow sleeve forming cavity, can effectively eject the plastic tray during demolding, greatly improving demolding efficiency and reducing the damage rate of the product during demolding.

[0017] 2. This utility model achieves precise molding of various complex structures of plastic pallets, such as panel through holes, recessed steps, and hollow sleeves, by having the upper molding component and the pallet hole grooves molded in a synchronously corresponding and shape-matched manner, with each molding protrusion and cavity cooperating with each other, thereby improving the precision and quality of the product.

[0018] 3. When producing different models of power battery plastic trays, this utility model only requires replacing the corresponding inner lining components in the upper molding assembly and the synchronous molding structure of the tray holes and slots, without replacing the entire mold. This greatly reduces the manufacturing cost of the mold, shortens the production preparation time, and improves the flexibility and efficiency of production.

[0019] Other advantages, objectives and features of this invention will be partly apparent from the following description, and partly understood by those skilled in the art through study and practice of this invention. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of this utility model.

[0021] Figure 2 This is a partial structural schematic diagram of the present invention.

[0022] Figure 3 This is a partial structural schematic diagram of another aspect of this utility model.

[0023] Figure 4 This is a partial structural diagram of the upper mold for forming a plastic pallet.

[0024] In the diagram: 1. Lower mold for plastic pallet forming; 2. Upper mold for plastic pallet forming; 3. Main injection molding board; 4. Injection manifold; 5. Upper pallet forming assembly; 6. Pallet hole and groove synchronous forming structure; 7. Ejector ejector; 8. Lower forming auxiliary chamber; 9. Lower hollow groove forming protrusion; 10. Hollow sleeve forming cavity; 11. Recessed step forming cavity; 12. Ejector fixing plate; 13. Ejector rod; 14. Sleeve screw hole forming rod; 16. Upper forming auxiliary chamber; 17. Panel through hole forming protrusion; 18. Recessed step forming protrusion; 19. Hollow sleeve forming shaft; 20. Manifold. Detailed Implementation

[0025] The present invention will be further described below with reference to the accompanying drawings.

[0026] like Figure 1-4As shown, a power battery plastic tray injection mold based on the changing inner liner technology includes a lower plastic tray forming mold 1 and an upper plastic tray forming mold 2. An injection main board 3 is provided above the upper plastic tray forming mold 2. An injection diversion part 4 and an upper tray forming component 5 are provided inside the upper plastic tray forming mold 2. A tray hole and groove synchronous forming structure 6 is provided inside the lower plastic tray forming mold 1. The tray hole and groove synchronous forming structure 6 corresponds to the position of the upper tray forming component 5 and is matched in shape. A straight ejector 7 that can reciprocate linearly in the vertical direction is provided below the lower plastic tray forming mold 1. The position of the straight ejector 7 corresponds to the tray hole and groove synchronous forming structure 6.

[0027] In this embodiment, during injection molding, the plastic raw material flows into the upper forming component 5 of the tray through the injection diversion section 4, and fills the gap between the upper forming component 5 of the tray and the synchronous forming structure 6 of the tray holes and grooves under pressure, thereby realizing the synchronous forming of the upper and lower holes and grooves of the plastic tray. The lower mold 1 of the plastic tray is provided with a straight ejector 7 that can reciprocate linearly in the vertical direction. The straight ejector 7 corresponds to the synchronous forming structure 6 of the tray holes and grooves. After injection molding is completed, the straight ejector 7 moves upward to eject the formed plastic tray out of the mold, which effectively solves the problem of difficult demolding and improves production efficiency compared with traditional molds.

[0028] Combination Figure 1-4 As shown, the synchronous forming structure 6 for the tray holes and grooves includes several lower forming auxiliary chambers 8 disposed in the lower mold 1 for forming plastic trays. Several lower hollow groove forming protrusions 9 are provided in the lower forming auxiliary chambers 8, wherein two lower hollow groove forming protrusions 9 have two hollow sleeve forming cavities 10.

[0029] Specifically, the lower molding auxiliary chamber 8 limits the flow range of plastic raw materials in the lower part of the tray, the lower hollow groove molding protrusion 9 shapes the hollow groove structure in the lower part of the tray, and the hollow sleeve molding cavity 10 shapes the hollow sleeve structure in the lower part of the tray. Through the cooperation of the three, the complex structure in the lower part of the plastic tray is precisely shaped, improving the product molding accuracy.

[0030] Combination Figure 3 , Figure 4 As shown, a recessed stepped body forming cavity 11 is formed between the lower forming auxiliary cavity 8 and the lower hollow groove forming protrusion 9.

[0031] In this embodiment, the recessed step forming cavity 11 is used to form a specific recessed step structure at the bottom of the plastic pallet, which, together with the corresponding upper structure, further improves the pallet forming accuracy.

[0032] The straight ejector 7 includes an ejector fixing plate 12 disposed below the lower mold 1 for forming a plastic tray. The ejector fixing plate 12 is provided with a plurality of straight ejector rods 13. The straight ejector rods 13 pass through the lower slot forming protrusion 9 and slide in cooperation with the lower slot forming protrusion 9.

[0033] In this embodiment, during demolding, the ejector plate 12 moves upward, driving the straight ejector rod 13 to slide upward along the lower hollow groove forming protrusion 9, thereby ejecting the plastic tray from the lower hollow groove forming protrusion 9 and achieving convenient demolding.

[0034] Combination Figure 3 As shown, the ejector fixing plate 12 is also provided with a sleeve screw hole forming rod 14, and a top cylinder 15 is sleeved on the sleeve screw hole forming rod 14. The sleeve screw hole forming rod 14 is arranged opposite to the hollow sleeve forming cavity 10.

[0035] In this embodiment, during the injection molding process, the sleeve screw hole forming rod 14 and the ejector cylinder 15 cooperate to form the sleeve screw hole structure on the plastic tray. During demolding, the sleeve screw hole forming rod 14 and the ejector cylinder 15 move upward with the ejection fixing plate 12 to assist in ejecting the sleeve part on the plastic tray and improve the demolding effect.

[0036] The sleeve screw hole forming rod 14 and the straight push rod 13 are parallel to each other and staggered.

[0037] In this embodiment, the sleeve screw hole forming rod 14 and the straight ejector rod 13 are arranged parallel to each other and staggered. This layout not only ensures effective ejection of different parts of the plastic tray and smooth demolding, but also makes reasonable use of the mold space, making the mold structure more compact.

[0038] The upper forming component 5 of the pallet includes a plurality of upper forming auxiliary chambers 16 disposed in the upper mold 2 of the plastic pallet forming, and the upper forming auxiliary chambers 16 have a plurality of panel through hole forming protrusions 17, and the lower slot forming protrusions 9 are arranged opposite to the panel through hole forming protrusions 17.

[0039] In this embodiment, during injection molding, the plastic raw material fills the gap between the lower empty groove forming protrusion 9 and the panel through hole forming protrusion 17, thereby forming the through hole of the plastic tray panel and improving the molding accuracy.

[0040] Combination Figure 3 , Figure 4 As shown, the upper molding auxiliary chamber 16 has a recessed step molding protrusion 18, which corresponds to the position of the recessed step molding cavity 11 and is matched in shape.

[0041] In this embodiment, during injection molding, the two work together to form the concave step structure of the plastic tray, ensuring the precision of the step structure molding.

[0042] Combination Figure 4 As shown, the upper molding auxiliary chamber 16 also has a hollow sleeve molding shaft 19, which is arranged opposite to the hollow sleeve molding cavity 10.

[0043] In this embodiment, during injection molding, the two work together to form the hollow sleeve structure of the plastic tray, ensuring the precise forming of the sleeve structure.

[0044] Combination Figure 4 As shown, the injection molding flow divider 4 includes a flow divider 20 disposed in the upper mold of the plastic tray forming mold 2, and the flow divider 20 is connected to the upper molding auxiliary chamber 16.

[0045] In this embodiment, the plastic raw material injected into the injection molding main board 3 is evenly distributed to each upper molding auxiliary chamber 16 through the diversion channel 20, ensuring that the plastic raw material is evenly distributed in the mold, avoiding product defects caused by uneven distribution of raw material, and improving product molding quality.

[0046] The working principle of this utility model is as follows:

[0047] Assemble the lower mold 1 and upper mold 2 of the plastic pallet forming according to the design requirements. Install the injection main board 3 above the upper mold 2. During injection molding, the plastic raw material is injected from the injection main board 3 and evenly distributed to each upper molding auxiliary chamber 16 through the flow channel 20 of the injection flow divider 4. Under pressure, the plastic raw material fills the upper molding auxiliary chamber 16 and the corresponding pallet hole groove synchronous molding structure 6, thereby realizing the injection molding of the plastic pallet. The lower molding auxiliary chamber of the pallet hole groove synchronous molding structure 6... The lower slotted forming protrusion 9 in the auxiliary molding chamber 8 is directly opposite to the panel through-hole forming protrusion 17 of the upper molding component 5 of the tray. During injection molding, the plastic raw material flows into the gap between the two to form the panel through-hole of the plastic tray. The hollow sleeve forming cavity 10 in the two lower slotted forming protrusions 9 is directly opposite to the hollow sleeve forming shaft 19 in the upper molding auxiliary chamber 16, together forming the hollow sleeve structure of the plastic tray. The recessed stepped forming cavity 11 formed between the lower molding auxiliary chamber 8 and the lower slotted forming protrusion 9. The molded plastic tray is formed by cooperating with the recessed step forming protrusion 18 in the upper molding auxiliary chamber 16 to form the recessed step structure. Through this multi-part cooperation, the complex hole and groove structure of the plastic tray is precisely formed. After injection molding, demolding is required. At this time, the ejector fixing plate 12 of the straight ejector 7 moves vertically upward under the action of an external driving device (such as a hydraulic device). The straight ejector rod 13 on the ejector fixing plate 12 passes through the lower slot forming protrusion 9 and slides with the lower slot forming protrusion 9. As the ejector plate 12 rises, the straight ejector rod 13 lifts the plastic tray from the lower hollow groove forming protrusion 9. Simultaneously, the sleeve screw hole forming rod 14 on the ejector plate 12, which is fitted with an ejector cylinder 15 and is positioned directly opposite the hollow sleeve forming cavity 10, assists in ejecting the sleeve portion of the plastic tray during the rising process. The sleeve screw hole forming rod 14 and the straight ejector rod 13 are parallel to each other and staggered. This layout not only effectively ejects different parts of the plastic tray, ensuring smooth demolding, but also makes reasonable use of the mold space.

[0048] When different models of power battery plastic trays need to be produced, based on the replacement liner technology of the present invention, only the corresponding liner components in the upper forming component 5 of the tray and the synchronous forming structure 6 of the tray hole groove need to be replaced, without replacing the entire mold. This greatly reduces the manufacturing cost of the mold, shortens the production preparation time, and improves the flexibility and efficiency of production.

[0049] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to replace them, without departing from the spirit of this utility model.

[0050] Although this document frequently uses terms such as lower mold for plastic pallet forming (1), upper mold for plastic pallet forming (2), injection main board (3), injection manifold (4), upper forming assembly for pallet (5), synchronous forming structure for pallet holes and slots (6), ejector demolding component (7), lower forming auxiliary chamber (8), lower hollow groove forming protrusion (9), hollow sleeve forming cavity (10), recessed step forming cavity (11), ejector fixing plate (12), ejector rod (13), sleeve screw hole forming rod (14), upper forming auxiliary chamber (16), panel through hole forming protrusion (17), recessed step forming protrusion (18), hollow sleeve forming shaft (19), and manifold (20), the possibility of using other terms is not excluded. The use of these terms is merely for the convenience of describing and explaining the essence of this utility model; interpreting them as any additional limitation would contradict the spirit of this utility model.

Claims

1. A power battery plastic tray injection mold based on a shape-changing inner liner technology, comprising a lower plastic tray forming mold (1) and an upper plastic tray forming mold (2), wherein an injection main board (3) is provided above the upper plastic tray forming mold (2), characterized in that, The upper mold (2) for forming the plastic pallet is provided with an injection flow divider (4) and an upper forming component (5) for the pallet. The lower mold (1) for forming the plastic pallet is provided with a synchronous forming structure (6) for the pallet holes and grooves. The synchronous forming structure (6) for the pallet holes and grooves corresponds to the position of the upper forming component (5) for the pallet and is matched in shape. The lower mold (1) for forming the plastic pallet is provided with a straight ejector (7) that can reciprocate in a straight line in the vertical direction. The straight ejector (7) corresponds to the position of the synchronous forming structure (6) for the pallet holes and grooves.

2. The power battery plastic tray injection mold based on the technology of the transformation inner liner according to claim 1, characterized in that, The synchronous forming structure (6) for the tray holes and grooves includes several lower forming auxiliary chambers (8) disposed in the lower mold (1) for forming plastic trays. Several lower empty groove forming protrusions (9) are provided in the lower forming auxiliary chambers (8), and two of the lower empty groove forming protrusions (9) have two hollow sleeve forming cavities (10).

3. The power battery plastic tray injection mold based on the technology of the transformation inner liner according to claim 2, characterized in that, A recessed step forming cavity (11) is formed between the lower forming auxiliary cavity (8) and the lower hollow forming protrusion (9).

4. The injection mold for a power battery plastic tray based on the shape-changing inner liner technology according to claim 3, characterized in that, The straight ejector (7) includes an ejector fixing plate (12) located below the plastic tray forming lower mold (1). The ejector fixing plate (12) is provided with a plurality of straight ejector rods (13). The straight ejector rods (13) pass through the lower slot forming protrusion (9) and slide in cooperation with the lower slot forming protrusion (9).

5. The injection mold for a power battery plastic tray based on the shape-changing inner liner technology according to claim 4, characterized in that, The ejector fixing plate (12) is also provided with a sleeve screw hole forming rod (14), and a top cylinder (15) is sleeved on the sleeve screw hole forming rod (14). The sleeve screw hole forming rod (14) is positioned opposite to the hollow sleeve forming cavity (10).

6. The injection mold for a power battery plastic tray based on the shape-changing inner liner technology according to claim 5, characterized in that, The sleeve screw hole forming rod (14) and the straight push rod (13) are parallel to each other and staggered.

7. The injection mold for a power battery plastic tray based on the shape-changing inner liner technology according to claim 6, characterized in that, The upper forming component (5) of the pallet includes a plurality of upper forming auxiliary chambers (16) disposed in the upper mold (2) of the plastic pallet forming, and the upper forming auxiliary chambers (16) have a plurality of panel through hole forming protrusions (17), and the lower slot forming protrusions (9) are arranged opposite to the panel through hole forming protrusions (17).

8. The injection mold for a power battery plastic tray based on the shape-changing inner liner technology according to claim 7, characterized in that, The upper molding auxiliary chamber (16) has a concave step molding protrusion (18), and the concave step molding protrusion (18) corresponds to the concave step molding cavity (11) in position and is matched in shape.

9. The injection mold for a power battery plastic tray based on the shape-changing inner liner technology according to claim 8, characterized in that, The upper forming auxiliary chamber (16) also has a hollow sleeve forming shaft (19), which is positioned opposite to the hollow sleeve forming cavity (10).

10. The injection mold for a power battery plastic tray based on the shape-changing inner liner technology according to claim 9, characterized in that, The injection molding flow divider (4) includes a flow divider (20) disposed in the upper mold (2) of the plastic tray forming, and the flow divider (20) is connected to the upper molding auxiliary chamber (16).

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