Injection mold with through-wall welding hole structure

Abstract

The utility model relates to an injection mold with a through-wall welding hole structure, which is used for injection molding of a storage battery shell. The mold comprises a front mold base and a rear mold base, wherein the front mold base and the rear mold base are respectively provided with a front mold core and a rear mold core. The rear mold base comprises a rear mold core, a perforating assembly, a second bottom plate and a first bottom plate. The rear mold core is composed of a plurality of mold core blocks, clearance grooves are formed in the side walls of the mold core blocks, blind holes are formed in the bottoms of the mold core blocks, and kidney-shaped hole grooves are formed in the side walls. The perforating assembly comprises a supporting rod, an inclined ejector rod and a punch, the inclined ejector rod is installed on the first bottom plate through the supporting rod, the inclined ejector rod penetrates through the second bottom plate and goes deep into the blind hole, an inclined sliding rail is arranged on the inclined ejector rod, and the punch is arranged on the sliding rail in a sliding mode and penetrates through the kidney-shaped hole groove. Through the unique through-wall welding hole structural design and the innovative design of the pitched roof, the punch, the sliding rail and the spring, the through-wall welding hole can be directly formed in the inner partition plate in the injection molding process, the subsequent machining procedure is simplified, and the production efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of injection molds, and specifically refers to an injection mold with a through-wall welding hole structure. By improving the mold design, the inclined ejector rod and the punch work together to accurately form structural parts with waist-shaped welding holes, which is suitable for injection molding of complex workpieces. Background Art

[0002] As an indispensable energy storage device in modern industry and daily life, the quality of battery casings directly impacts their safety and performance. Traditional injection molding technology, when producing battery casings, typically employs the basic principle of injecting molten plastic into the mold cavity under high temperature and high pressure, then releasing the plastic after it cools and solidifies, resulting in the desired battery casing.

[0003] However, existing injection molds face some challenges during the production process, such as Figure 1 As shown, the problem is particularly prominent when processing the internal partition 310 of the battery container 300. First, the shell formed by the traditional mold needs to have a hole 311 opened in the internal partition 310, which means that after the injection molding process is completed, an additional processing step is required to perform the hole opening process on the partition before through-wall welding. This structural limitation not only increases the difficulty of subsequent processing, but also leads to a decrease in production efficiency. Secondly, traditional injection molds often rely on manual operation during demoulding, which not only increases labor costs, but also may cause damage to the product during the demoulding process, further affecting product quality. Therefore, when existing injection molds process complex structures such as through-wall welds, it is difficult to achieve efficient, automated production and high-precision product output. Utility Model Content

[0004] The purpose of this utility model is to provide an injection mold with a through-wall weld hole structure. By optimizing the mold structure, this invention aims to at least partially address the existing problems of difficult opening holes in the internal partitions of battery housings after injection molding, as well as the complex demolding process and the resulting damage to the product. By incorporating a coordinated mechanism between a bevel and a punch, this invention automatically forms the through-wall weld holes in the internal partitions during the injection molding process, improving production efficiency and product quality.

[0005] The technical solution of the present utility model is achieved as follows:

[0006] An injection mold with a through-wall welding hole structure, comprising a front mold base and a rear mold base, wherein the front mold base and the rear mold base are respectively provided with a front mold core and a rear mold core, wherein the rear mold base comprises a rear mold core, a perforation assembly, a second bottom plate and a first bottom plate;

[0007] The rear mold core is composed of a plurality of mold core blocks, the bottom of each mold core block is provided with a blind hole, and the side wall of each mold core block is provided with a waist hole groove;

[0008] The punch assembly includes a support rod, an inclined ejector rod and a punch, wherein the inclined ejector rod is mounted on the first bottom plate through the support rod, and the inclined ejector rod passes through the second bottom plate and penetrates into the blind hole;

[0009] The inclined ejector rod is provided with an inclined slide rail, and the punch is slidably provided on the inclined slide rail, and the punch passes through the waist hole groove.

[0010] Furthermore, a spring is provided between the second bottom plate and the first bottom plate.

[0011] Furthermore, at least one perforation component is provided on the rear mold base.

[0012] The injection mold with the through-wall welding hole structure of the present invention has the following beneficial effects:

[0013] (1) Improved automated molding efficiency: By designing an injection mold with a through-wall welding hole structure, through-wall welding holes can be directly formed on the internal partition during the battery shell molding process. This greatly simplifies the subsequent processing steps, reduces the difficulty of through-wall welding processing, and thus improves the overall production efficiency.

[0014] (2) Automated demoulding and reduced manual intervention: The mold design of the present invention achieves complete automation of the demoulding process, eliminating the need for manual intervention. During the demoulding stage, the spring at the bottom of the mold pushes the second bottom plate upward, the support rod pulls the inclined top rod downward, and the punch retreats under the guidance of the inclined top slide rail, disengaging from the partition of the battery slot and providing space for product demoulding. This design not only reduces labor costs and labor requirements, but also reduces the risk of product damage during the demoulding process and improves product quality.

[0015] (3) Precision and stability improve product quality: The cooperation between the punch and the inclined top, as well as the precise guidance of the slide rail, ensure the integrity and accuracy of the product wall thickness during the molding and demolding process. This design reduces product defects and improves the overall quality and consistency of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 Schematic diagram of the battery slot structure;

[0017] Figure 2 This is a schematic structural diagram of the injection mold with a through-wall welding hole structure of the utility model;

[0018] Figure 3 for Figure 2 One directional view of

[0019] Figure 4 for Figure 2 Schematic diagram of the decomposition;

[0020] Figure 5 for Figure 4 Schematic diagram of the rear die base;

[0021] Figure 6 for Figure 5 The exploded diagram of the rear die base, omitting one die core block;

[0022] Figure 7 It is a structural diagram of the perforated component;

[0023] Figure 8 for Figure 7 Schematic diagram of the perforation component structure in the middle mold opening state;

[0024] Figure 9 for Figure 7 A magnified schematic diagram of part A;

[0025] Figure 10 for Figure 2 Schematic diagram of the structure of the front mold, battery compartment and rear mold;

[0026] Figure 11 for Figure 3 Middle BB section view. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the present invention will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present invention.

[0028] like Figures 1 to 11 The injection mold with a through-wall welding hole structure shown in this embodiment includes a front mold base 100 and a rear mold base 200, each of which is provided with a front mold core 110 and a rear mold core 220. The rear mold base 200 includes the rear mold core 220, a perforation assembly 210, a second base plate 230, and a first base plate 240.

[0029] The front mold core 110 cooperates with the rear mold core 220 to form the injection cavity, ensuring uniform filling of the plastic melt during the injection molding process. The rear mold core 220 is composed of multiple mold core blocks 221. The sidewalls of each mold core block 221 are provided with clearance grooves 223. These clearance grooves 223 are formed by the interlocking notches in the sidewalls of two mold core blocks 221. The width of the clearance grooves 223 matches the thickness of the partition 310. The bottom of the mold core block 221 is provided with a blind hole 222. The sidewalls of the mold core block 221 are provided with a waist hole groove 224 that matches the punch 214. The punch 214 extends through the waist hole groove 224.

[0030] The punch assembly 210 includes a support rod 212, a lift rod 211, and a punch 214. The support rod 212 is used to secure the lift rod 211, ensuring its stable position within the mold. The lift rod 211 is mounted on the first base plate 240 via the support rod 212. The lift rod 211 extends through the second base plate 230 and into the blind hole 222 of the mold core block 221. The lift rod 211 is provided with an inclined slide rail 213, on which a punch 214 is slidably mounted. One end of the punch 214 is slidably mounted on the lift rod 211.

[0031] A spring 231 is provided between the second bottom plate 230 and the first bottom plate 240. The spring 231 pushes the second bottom plate 230 apart during die opening, providing space for the punch 214 to retreat. The first bottom plate 240 is used to secure the support rod 212 and the inclined ejector rod 211, ensuring the stability of the entire punch assembly 210.

[0032] The design of the punch 214 is one of the key elements of the present invention. The punch 214 moves along the slide rail of the inclined ejector 211. In the closed mold state, the punch 214 extends out of the waist hole slot 224 of the die block 221 and abuts against the side wall of the adjacent die block 221, tightly fitting the die core to ensure accurate hole formation.

[0033] It should be noted that the shape and size of the punch 214 should match the through-wall welding hole to be formed to ensure the accuracy and integrity of the hole position.

[0034] Regarding the design of spring 231, it is used to achieve automated demolding. During mold opening, spring 231 pushes the second base plate 230 upward, while support rod 212 pulls the lift rod 211 downward. The punch 214, guided by the lift rail, retreats, retracting into the waist hole groove 224 and disengaging the partition 310 of the battery compartment 300, providing space for product demolding.

[0035] The working principle of this utility model is as follows:

[0036] During the mold closing phase, the inclined ejector pin 211 penetrates the blind hole 222 of the core block 221. The punch 214 moves along the slide rail of the inclined ejector pin 211. Driven laterally by the slide rail, the punch 214 extends out of the core block 221 and abuts against the sidewall of the adjacent core block 221, forming a tight fit with the core. The plastic melt is then injected into the mold cavity under high temperature and high pressure. Subsequently, as the plastic cools and solidifies, the punch 214 remains stationary, ensuring accurate hole formation. This forms a through-wall weld hole in the internal partition 310 of the battery housing. The inclined ejector pin 214 ensures precise hole formation in the closed mold state.

[0037] During mold opening, the spring 231 at the bottom of the mold pushes the second bottom plate 230 upward, while the support rod 212 pulls the inclined ejector rod 211 downward, causing the punch 214 to move again along the slide rail of the inclined ejector rod 211. Guided by the inclined ejector rail, the punch 214 retreats, retracting into the waist hole groove 224 and disengaging the partition 310 of the battery container 300, thus providing space for product demolding. This design ensures that the through-wall weld hole will not interfere with the mold after formation, allowing for smooth demolding.

[0038] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An injection mold with a through-wall welding hole structure, comprising a front mold base and a rear mold base, wherein the front mold base and the rear mold base are respectively provided with a front mold core and a rear mold core, characterized in that: The rear mold base includes a rear mold core, a perforation assembly, a second bottom plate and a first bottom plate; The rear mold core is composed of a plurality of mold core blocks, the bottom of each mold core block is provided with a blind hole, and the side wall of each mold core block is provided with a waist hole groove; The punch assembly includes a support rod, an inclined ejector rod and a punch, wherein the inclined ejector rod is mounted on the first bottom plate through the support rod, and the inclined ejector rod passes through the second bottom plate and penetrates into the blind hole; The inclined ejector rod is provided with an inclined slide rail, and the punch is slidably provided on the inclined slide rail, and the punch passes through the waist hole groove.

2. The injection mold with a through-wall welding hole structure according to claim 1, characterized in that: A spring is provided between the second bottom plate and the first bottom plate.

3. The injection mold with a through-wall welding hole structure according to claim 1, characterized in that: At least one perforating component is provided on the rear mold base.

Images