Plastic tray injection mold special for cylindrical power battery processing

Abstract

The utility model provides a special plastic tray injection mold for processing a cylindrical power battery, and belongs to the technical field of molds. The mold comprises an upper mold plate and a lower mold plate, a square tray forming cavity with a battery clamping groove forming structure is formed between the upper mold plate and the lower mold plate, a square multi-point outer balance pouring mechanism is arranged on the upper side of the upper mold plate, and an ejection mechanism is further arranged on the lower side of the lower mold plate. The regular quadrangle tray forming cavity can form a regular quadrangle tray through injection molding, the battery clamping groove forming structure can form a plurality of battery clamping grooves in the regular quadrangle tray, and the regular quadrangle multi-point external balance feeding mechanism can feed glue into the cavity from the four side edges of the regular quadrangle tray forming cavity, so that the injection molding efficiency can be improved; and the injection of the glue solution can be more balanced, the probability that a local cavity is generated in the square tray forming cavity is reduced, and after injection molding of the product, the product can be ejected out of the lower mold plate through the ejection mechanism.

Description

Technical Field

[0001] This utility model belongs to the field of mold technology and relates to an injection mold for a special plastic tray for processing cylindrical power batteries. Background Technology

[0002] Cylindrical power battery processing special plastic trays are generally formed by injection molding. Because the battery slots inside the tray are arranged relatively densely, the channels through which the glue flows in the molding cavity are relatively narrow. The existing glue injection mechanism has a slow and uneven filling speed of glue during injection molding, which easily forms local cavities in the molding cavity.

[0003] For example, a Chinese patent discloses a manufacturing process for a battery tray [application number: 202311248474.3], which includes material preparation, injection molding, surface treatment, assembly, and inspection. The battery tray is made of plastic, such as high-density polyethylene or polypropylene. The battery tray is made by injection molding. First, plastic granules are added to the injection molding machine, and the plastic is melted into a liquid state by heating and pressure. Utility Model Content

[0004] The purpose of this utility model is to address the above-mentioned problems by providing a special plastic tray injection mold for processing cylindrical power batteries.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A cylindrical power battery processing plastic tray injection mold includes an upper mold plate and a lower mold plate. A regular quadrilateral tray forming cavity with a battery slot forming structure is provided between the upper mold plate and the lower mold plate. A regular quadrilateral multi-point external balanced injection mechanism is provided on the upper side of the upper mold plate, and an ejection mechanism is provided on the lower side of the lower mold plate.

[0007] In the above-mentioned injection mold for a cylindrical power battery processing plastic tray, the quadrilateral multi-point external balanced injection mechanism includes a cross-shaped injection plate set on the upper side of the upper template. The four branch plates of the cross-shaped injection plate are set with equal lengths. The bottom end of the branch plate is fixed with an injection tube that vertically penetrates the upper template. The injection tube is aligned with the middle position of the side of the quadrilateral tray forming cavity and is located outside the quadrilateral tray forming cavity. The lower template is also provided with a flow diversion structure corresponding to the injection tube.

[0008] In the above-mentioned injection mold for a cylindrical power battery processing plastic tray, the flow distribution structure includes a flow distribution channel recessed inward on the lower template, and the flow distribution channel has two connecting channels connected to the square tray forming cavity on the side near the square tray forming cavity.

[0009] In the above-mentioned injection mold for a special plastic tray for cylindrical power battery processing, the battery slot forming structure includes several slot forming grooves recessed inward on the lower template and slot forming blocks protruding on the upper template. The slot forming grooves and slot forming blocks are correspondingly arranged and distributed in a rectangular array.

[0010] In the above-mentioned injection mold for a special plastic tray for cylindrical power battery processing, the cross-section of the slot forming groove is circular, the upper part of the slot forming groove is a flared part, the inner diameter of the flared part gradually increases from bottom to top, the lower part of the slot forming groove is cylindrical, the shape of the slot forming block is adapted to the slot forming groove, and the outer surface of the slot forming block abuts against the inner surface of the slot forming groove.

[0011] In the aforementioned injection mold for a cylindrical power battery processing plastic tray, the lower template is also provided with a reinforcing rib forming structure.

[0012] In the above-mentioned injection mold for a cylindrical power battery processing plastic tray, the reinforcing rib forming structure includes several reinforcing rib forming grooves arranged circumferentially along the slot forming groove. The inner end of the reinforcing rib forming groove is connected to the slot forming groove, and the outer end is connected to the adjacent slot forming groove or the outer edge forming groove on the lower template corresponding to the side of the square tray forming cavity.

[0013] In the above-mentioned injection mold for a cylindrical power battery processing plastic tray, the ejection mechanism includes a top plate disposed on the lower side of the lower template. Several vertical push rods that penetrate the lower template are fixedly connected to the top plate. The top of the push rods is connected to the lower surface of the square tray forming cavity and is offset from the slot forming groove.

[0014] In the above-mentioned injection mold for a cylindrical power battery processing plastic tray, the top plate is also provided with four sets of residual material ejection structures corresponding to the flow channels.

[0015] In the aforementioned injection mold for a cylindrical power battery processing plastic tray, the residual material ejection structure includes three residual material ejection rods fixed to the top plate. The residual material ejection rods vertically penetrate the lower mold plate and are connected to the diversion channel at their top.

[0016] Compared with existing technologies, the advantages of this utility model are:

[0017] 1. The rectangular tray molding cavity can be injection molded into a rectangular tray. The battery slot molding structure can form several battery slots on the rectangular tray. The rectangular multi-point external balanced injection mechanism can inject glue into the cavity from the four sides of the rectangular tray molding cavity, which can not only improve injection efficiency, but also make the injection of glue more even, reducing the probability of local cavities in the rectangular tray molding cavity. After the product is injection molded, the ejection mechanism can eject the product from the lower mold plate.

[0018] 2. The four branch plates of the cross-shaped injection plate can divert the injection liquid to the four directions of the square tray molding cavity. Through the injection pipe and the diversion structure, the injection liquid is injected into the cavity from the four sides of the square tray molding cavity, which can improve the injection efficiency and make the injection of the glue more even.

[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 external structure of this utility model;

[0021] Figure 2 This is a cross-sectional view of the present invention;

[0022] Figure 3 This is a partial structural schematic diagram of the present invention;

[0023] Figure 4 This is a structural diagram of the lower template;

[0024] Figure 5 This is a schematic diagram of the ejection mechanism.

[0025] In the diagram, 1 is the upper template, 2 is the lower template, 3 is the battery slot forming structure, 4 is the square tray forming cavity, 5 is the square multi-point external balanced injection mechanism, 6 is the ejection mechanism, 7 is the cross-shaped injection plate, 8 is the injection tube, 9 is the flow distribution structure, 10 is the flow distribution channel, 11 is the connecting channel, 12 is the slot forming groove, 13 is the reinforcing rib forming groove, 14 is the outer edge forming groove, 15 is the top plate, 16 is the straight ejector rod, 17 is the excess material ejector rod, and 18 is the slot forming block. Detailed Implementation

[0026] like Figures 1-5 As shown, a cylindrical power battery processing plastic tray injection mold includes an upper mold plate 1 and a lower mold plate 2. A square tray forming cavity 4 with a battery slot forming structure 3 is provided between the upper mold plate 1 and the lower mold plate 2. A square multi-point external equalization injection mechanism 5 is provided on the upper side of the upper mold plate 1, and an ejection mechanism 6 is provided on the lower side of the lower mold plate 2.

[0027] In this invention, the quadrilateral tray molding cavity 4 can be injection molded to form a quadrilateral tray, the battery slot molding structure can form several battery slots on the quadrilateral tray, and the quadrilateral multi-point external balanced injection mechanism 5 can inject glue into the cavity from the four sides of the quadrilateral tray molding cavity 4, which can not only improve the injection efficiency, but also make the injection of glue more balanced and reduce the probability of local cavities in the quadrilateral tray molding cavity 4. After the product is injection molded, the product can be ejected from the lower template by the ejection mechanism 6.

[0028] Specifically, the quadrilateral multi-point external balanced injection mechanism 5 includes a cross-shaped injection plate 7 disposed on the upper side of the upper mold plate 1. The four branch plates of the cross-shaped injection plate 7 are of equal length, and the bottom ends of the branch plates are fixedly connected to injection pipes 8 that vertically penetrate the upper mold plate 1. The injection pipes 8 are aligned with the middle position of the side of the quadrilateral tray forming cavity 4 and are located outside the quadrilateral tray forming cavity 4. The lower mold plate 2 is also provided with a diversion structure 9 corresponding to the injection pipes 8. The four branch plates of the cross-shaped injection plate 7 can divert the injection liquid to the four directions of the quadrilateral tray forming cavity 4, and through the injection pipes 8 and the diversion structure 9, the injection liquid is injected into the cavity from the four sides of the quadrilateral tray forming cavity 4, which can improve injection efficiency and make the injection of the adhesive more even.

[0029] Specifically, the flow-dividing structure 9 includes a flow-dividing channel 10 recessed inward on the lower template 2. The flow-dividing channel 10 has two connecting channels 11 on the side near the square tray molding cavity 4, which are connected to the square tray molding cavity 4. Through the flow-dividing channel and the two connecting channels, the injection molding liquid injected from one injection tube can enter the cavity through two locations on the side of the square tray molding cavity 4, thereby improving injection molding efficiency.

[0030] Specifically, the battery slot forming structure 3 includes several inwardly recessed slot forming grooves 12 on the lower template 2 and slot forming blocks 18 protruding from the upper template 1. The slot forming grooves 12 and the slot forming blocks 18 are correspondingly arranged in a rectangular array. The cross-section of the slot forming groove 12 is circular, and the upper part of the slot forming groove 12 is a flared portion with an inner diameter that gradually increases from bottom to top. The lower part of the slot forming groove 12 is cylindrical. The shape of the slot forming blocks 18 is adapted to the slot forming groove 12, and the outer surface of the slot forming blocks 18 abuts against the inner surface of the slot forming groove 12. The slot forming grooves 12 and the slot forming blocks 18 work together to form a battery slot with a circular cross-section on a plastic tray. The flared portion at the top of the slot forming groove 12 makes the upper part of the battery slot flared to facilitate the insertion of the battery into the slot.

[0031] Preferably, the lower template 2 is further provided with a reinforcing rib forming structure. The reinforcing rib forming structure can form reinforcing ribs on the lower surface of the plastic pallet, thereby increasing the overall strength of the pallet.

[0032] Specifically, the reinforcing rib forming structure includes several reinforcing rib forming grooves 13 arranged circumferentially along the slot forming grooves 12. The inner end of each reinforcing rib forming groove 13 is connected to the slot forming groove 12, and the outer end is connected to the adjacent slot forming groove 12 or the outer edge forming groove 14 on the lower template 2 corresponding to the side of the square tray forming cavity 4. The reinforcing rib forming grooves can form reinforcing ribs connecting the outer walls of adjacent battery slots or connecting the outer edge of the tray and the outer walls of the battery slots at the bottom of the tray, thereby improving the overall strength of the tray.

[0033] Specifically, the ejection mechanism 6 includes a top plate 15 disposed on the lower side of the lower template 2. Several vertical push rods 16 are fixedly connected to the top plate 15, penetrating the lower template 2. The top ends of the push rods 16 are connected to the lower surface of the square tray forming cavity 4 and are offset from the slot forming groove 12. Moving the top plate upwards applies a pushing force to the top of the tray via the push rods, thereby ejecting the tray from the lower template.

[0034] Specifically, the top plate 15 is also equipped with four sets of residual material ejection structures corresponding to the diversion channel 10. Each residual material ejection structure includes three residual material ejection rods 17 fixed on the top plate 15. The residual material ejection rods 17 vertically penetrate the lower template 2 and are connected to the diversion channel 10 at their top. When the top plate moves upward, the residual material in the diversion channel can be ejected through the residual material ejection rods.

[0035] The working principle of this utility model is as follows: the square tray forming cavity 4 can be injection molded to form a square tray; the battery slot forming structure can form several battery slots on the square tray; the square multi-point external balanced injection mechanism 5 can inject glue into the cavity from the four sides of the square tray forming cavity 4, which can not only improve the injection efficiency, but also make the injection of glue more balanced and reduce the probability of local cavities in the square tray forming cavity 4; after the product is injection molded, the product can be ejected from the lower template by the ejection mechanism 6.

[0036] The four branch plates of the cross-shaped injection plate 7 can divert the injection liquid to the four directions of the square tray molding cavity 4, and through the injection tube 8 and the diversion structure 9, the injection liquid is injected into the cavity from the four sides of the square tray molding cavity 4, which can improve the injection efficiency and make the injection of the liquid more even. Through the diversion channel and two connecting channels, the injection liquid injected by one injection tube can be injected into the cavity through two positions on the side of the square tray molding cavity 4, thereby improving the injection efficiency.

[0037] The card slot forming groove 12 and the card slot forming block 18 can cooperate to form a battery card slot with a circular cross-section on the plastic tray. The flared part at the top of the card slot forming groove 12 can make the top of the battery card slot flared so that the battery can be put into the card slot.

[0038] The reinforcing rib forming structure can form a reinforcing rib on the lower surface of the plastic pallet, thereby increasing the overall strength of the pallet. The reinforcing rib forming groove can form a reinforcing rib at the bottom of the pallet that connects to the outer wall of the adjacent battery slot or connects the outer edge of the pallet and the outer wall of the battery slot, thereby improving the overall strength of the pallet.

[0039] The upward movement of the top plate can push the pallet off the lower template by applying a pushing force to the top of the pallet through several straight push rods. When the top plate moves upward, it can also push out the excess material in the diversion channel through the excess material ejection rod.

[0040] 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 substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

[0041] Although this article frequently uses terms such as upper template 1, lower template 2, battery slot forming structure 3, square tray forming cavity 4, square multi-point external balanced injection mechanism 5, ejection mechanism 6, cross-shaped injection plate 7, injection tube 8, flow divider structure 9, flow divider channel 10, connecting channel 11, slot forming groove 12, reinforcing rib forming groove 13, outer edge forming groove 14, top plate 15, straight ejector rod 16, excess material ejector rod 17, slot forming block 18, etc., these terms are used merely to more conveniently describe and explain the essence of this utility model; interpreting them as any kind of additional limitation would contradict the spirit of this utility model.

Claims

1. A plastic tray injection mold special for processing cylindrical power batteries, comprising an upper mold plate (1) and a lower mold plate (2), characterized in that, A quadrilateral tray forming cavity (4) with a battery slot forming structure (3) is provided between the upper template (1) and the lower template (2). A quadrilateral multi-point external equalization pouring mechanism (5) is provided on the upper side of the upper template (1), and an ejection mechanism (6) is provided on the lower side of the lower template (2).

2. The injection mold for the plastic tray for processing cylindrical power batteries according to claim 1, characterized in that, The quadrilateral multi-point external balanced injection mechanism (5) includes a cross-shaped injection plate (7) set on the upper side of the upper template (1). The four branch plates of the cross-shaped injection plate (7) are set with equal length. The bottom end of the branch plate is fixed with an injection tube (8) that runs vertically through the upper template (1). The injection tube (8) is aligned with the middle position of the side of the quadrilateral tray forming cavity (4) and is located outside the quadrilateral tray forming cavity (4). The lower template (2) is also provided with a diversion structure (9) corresponding to the injection tube (8).

3. The injection mold for the plastic tray for processing cylindrical power batteries according to claim 2, characterized in that, The diversion structure (9) includes a diversion channel (10) recessed inward on the lower template (2). The diversion channel (10) has two connecting channels (11) connected to the square tray forming cavity (4) on the side near the square tray forming cavity (4).

4. The injection mold for the plastic tray for processing cylindrical power batteries according to claim 3, characterized in that, The battery slot forming structure (3) includes several slot forming grooves (12) recessed inward on the lower template (2) and slot forming blocks (18) protruding on the upper template (1). The slot forming grooves (12) and slot forming blocks (18) are correspondingly arranged and distributed in a rectangular array.

5. The injection mold for the plastic tray for processing cylindrical power batteries according to claim 4, characterized in that, The cross-section of the card slot forming groove (12) is circular. The upper part of the card slot forming groove (12) is a flared part, and the inner diameter of the flared part gradually increases from bottom to top. The lower part of the card slot forming groove (12) is cylindrical. The shape of the card slot forming block (18) is adapted to the card slot forming groove (12). The outer surface of the card slot forming block (18) abuts against the inner surface of the card slot forming groove (12).

6. The injection mold for the plastic tray for processing cylindrical power batteries according to claim 5, characterized in that, The lower template (2) is also provided with a reinforcing rib forming structure.

7. The injection mold for the plastic tray for processing cylindrical power batteries according to claim 6, characterized in that, The reinforcing rib forming structure includes several reinforcing rib forming grooves (13) arranged circumferentially along the slot forming groove (12). The inner end of the reinforcing rib forming groove (13) is connected to the slot forming groove (12), and the outer end is connected to the adjacent slot forming groove (12) or the outer edge forming groove (14) on the lower template (2) corresponding to the side of the square tray forming cavity (4).

8. The injection mold for a cylindrical power battery processing plastic tray according to claim 7, characterized in that, The ejection mechanism (6) includes a top plate (15) set on the lower side of the lower template (2). Several vertical straight push rods (16) that penetrate the lower template (2) are fixed on the top plate (15). The top of the straight push rod (16) is connected to the lower surface of the square tray forming cavity (4) and is offset from the slot forming groove (12).

9. The injection mold for the plastic tray for processing cylindrical power batteries according to claim 8, characterized in that, The top plate (15) is also provided with four sets of residual material ejection structures corresponding to the diversion channel (10).

10. The injection mold for the plastic tray for processing cylindrical power batteries according to claim 9, characterized in that, The residual material ejection structure includes three residual material ejection rods (17) fixed on the top plate (15). The residual material ejection rods (17) vertically penetrate the lower template (2) and are connected to the diversion channel (10) at the top.

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