Lightweight battery tray mold of mold core reference positioning mechanism

Abstract

The utility model discloses a lightweight battery tray mold of a mold core reference positioning mechanism, which relates to the technical field of injection molds, and comprises a lower mold base and an upper mold base, the upper mold base is arranged at the top end of the lower mold base, a guide positioning mechanism is arranged on one side of the lower mold base, and the guide positioning mechanism is arranged on the other side of the lower mold base. According to the guide positioning mechanism, when the mold core body is installed, after a positioning pin is inserted into a positioning cavity, a bolt is screwed to drive a sliding rod to move, a limiting ball is pushed out of a clamping groove through an inclined face of a limiting groove and clamped into a fixing groove, and stable mechanical locking is formed; the position stability of the mold core under the injection molding pressure is effectively guaranteed, the limiting bead can be withdrawn by reversely rotating the bolt during disassembly, complex tools are not needed in the whole process, the replacement time of the mold core is greatly shortened, the mold maintenance efficiency is improved, meanwhile, high-precision reset of each time of installation is guaranteed, and the high-precision production requirement of the battery tray mold is met.

Description

Technical Field

[0001] This utility model relates to the field of injection mold technology, specifically a lightweight battery tray mold with a core reference positioning mechanism. Background Technology

[0002] Battery trays are housing devices for batteries used in the electric vehicle industry. They are mainly used to hold and fix the batteries. Whether the batteries can function well depends on their condition in the vehicle, including temperature, fixing strength, vibration resistance, and distance from electrical equipment. In injection molding, preheated plastic raw materials are first injected into the mold cavity at high speed through the injection molding machine's gating system under high pressure. After cooling by the cooling system, the mold's demolding mechanism is activated, and the formed battery tray is smoothly pushed out of the mold cavity through ejector pins, sliders, and other devices.

[0003] Traditional mold core positioning structures often employ simple pin positioning or bolt fastening methods. During injection molding, these methods are insufficient to withstand the impact of melt pressure fluctuations, leading to slight displacement of the core and affecting the molding accuracy of the battery tray. Furthermore, when cleaning or replacing the core, the traditional disassembly process is cumbersome and consumes a significant amount of time and manpower. On the other hand, in the mold closing and positioning stage, some molds rely solely on guide pillars and guide sleeves for positioning, resulting in limited guiding accuracy. This can easily cause the upper and lower mold bases to shift during injection molding, leading to significant coaxiality deviations and quality defects in the battery tray, such as dimensional errors and uneven wall thickness.

[0004] Therefore, this utility model provides a lightweight battery tray mold with a core reference positioning mechanism. Utility Model Content

[0005] To address the shortcomings of traditional molds that typically use pins or bolts for core positioning, which are insufficient to withstand injection pressure impacts that can lead to core displacement affecting molding accuracy and are cumbersome to disassemble, and the limitations of mold positioning relying on guide pillars and guide sleeves that restrict guidance accuracy and cause significant coaxiality deviations between the upper and lower mold bases during injection molding, resulting in quality defects such as dimensional inconsistencies and uneven wall thickness in battery trays, this invention aims to provide a lightweight battery tray mold with a core reference positioning mechanism.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a lightweight battery tray mold with a core reference positioning mechanism, comprising a lower mold base and an upper mold base, wherein the upper mold base is disposed at the top of the lower mold base, and a guide positioning mechanism is provided on one side of the lower mold base, the guide positioning mechanism comprising:

[0007] The mounting assembly includes a core body located at the lower part of the lower mold base. Positioning pins are fixedly installed on both sides of the core body. The lower part of the lower mold base has two symmetrically distributed positioning cavities. The two positioning pins are slidably locked inside the positioning cavities. A sliding cavity is opened in the middle of the two positioning pins. A sliding rod is slidably locked in the middle of the two sliding cavities. A limit groove is opened on one side of the upper part of the two sliding rods. Two symmetrically distributed slots are opened at one end of the two positioning pins. Limit beads are slidably locked in the two slots. A threaded groove is opened on one side of the inner wall of the two positioning pins. A bolt is rotatably installed at one end of the two sliding rods. The two bolts are threadedly installed in the middle of one side of the positioning pins.

[0008] The guide assembly, located on the outside of the upper mold base, is used to position the mold.

[0009] Preferably, the guide assembly includes two guide rods fixedly installed on both sides of the upper mold base, a second magnetic block fixedly installed on one side of each of the four guide rods, two symmetrically distributed guide blocks fixedly installed on both sides of the lower mold base, and a first magnetic block fixedly installed at the top of each of the four guide blocks to cooperate with the second magnetic block.

[0010] Preferably, the lower part of the lower mold base has a cavity, and the core body is slidably locked in the middle of the cavity.

[0011] Preferably, the lower part of the lower mold base has two symmetrically distributed fixing grooves, and multiple limiting beads are slidably locked inside the fixing grooves.

[0012] Preferably, buffer pads are fixedly installed on the inner upper surfaces of both positioning cavities, and the tops of the two positioning pins are in contact with the buffer pads.

[0013] Preferably, each of the four guide rods has a guide groove in the middle, and multiple guide blocks are slidably engaged in the corresponding guide grooves.

[0014] Beneficial effects

[0015] This invention provides a lightweight battery tray mold with a core reference positioning mechanism. Compared with the prior art, it has the following advantages:

[0016] 1. In this application, when installing the core body, after inserting the positioning pin into the positioning cavity, the sliding rod is driven to move by tightening the bolt. The limiting ball is pushed out of the slot and locked into the fixing slot by the inclined surface of the limiting groove, forming a stable mechanical lock. This effectively ensures the positional stability of the core under injection pressure. When disassembling, the limiting ball can be removed by rotating the bolt in the opposite direction. The whole process does not require complicated tools, which greatly shortens the core replacement time, improves the mold maintenance efficiency, and ensures high-precision reset for each installation, meeting the high-precision production requirements of battery tray molds.

[0017] 2. In this application, when the upper mold base moves downward towards the lower mold base, the guide rod moves downward simultaneously, causing the guide block to slide relative to each other along the guide groove. This minimizes the coaxiality error between the upper and lower mold bases, ensuring the positional accuracy when the mold is closed and avoiding dimensional errors and quality defects in the battery tray caused by mold closing deviations. When the guide rod approaches the guide block, the first and second magnetic blocks generate a strong attraction after being energized, further enhancing the stability of the mold after closing and effectively resisting the impact of melt pressure during injection molding. When the mold opens, the magnetic blocks are de-energized and demagnetized, and the guide rod moves, causing the guide block to slide smoothly in the guide groove in opposite directions. This process is highly automated and accurately positioned, greatly improving the efficiency and reliability of mold opening and closing, and ensuring the efficient and stable production of the battery tray mold. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of this utility model.

[0019] Figure 2 This is a cross-sectional structural diagram of the present invention.

[0020] Figure 3 This utility model Figure 2 Enlarged view of point A in the middle.

[0021] Figure 4 This is a schematic diagram of the cross-sectional structure of the positioning pin of this utility model.

[0022] Figure 5 This is a schematic diagram of the guide component structure of this utility model.

[0023] In the diagram: 1. Lower mold base; 11. Upper mold base; 2. Guide and positioning mechanism; 21. Mounting assembly; 211. Core body; 212. Cavity; 213. Positioning pin; 2131. Sliding cavity; 2132. Positioning cavity; 214. Sliding rod; 215. Limiting groove; 216. Limiting bead; 2161. Slot; 2162. Fixing groove; 217. Bolt; 218. Buffer pad; 22. Guide assembly; 221. Guide rod; 222. Guide groove; 223. Guide block; 224. Magnetic block No. 1; 225. Magnetic block No. 2. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] Please see Figures 1-5This utility model provides a technical solution: a lightweight battery tray mold with a core reference positioning mechanism, including a lower mold base 1 and an upper mold base 11, the upper mold base 11 being disposed at the top of the lower mold base 1, and a guide positioning mechanism 2 being provided on one side of the lower mold base 1, the guide positioning mechanism 2 including:

[0026] The mounting assembly 21 includes a core body 211 disposed at the lower part of the lower mold base 1. The core body 211 is made of high-strength, lightweight aluminum alloy material and has strong yield strength to ensure that it does not deform under injection pressure. Positioning pins 213 are fixedly installed on both sides of the core body 211. Two symmetrically distributed positioning cavities 2132 are opened at the lower part of the lower mold base 1. The two positioning pins 213 are slidably engaged inside the positioning cavities 2132. A sliding cavity 2131 is opened in the middle of each of the two positioning pins 213, and a sliding rod 214 is slidably engaged in the middle of each of the two sliding cavities 2131. A limiting groove 215 is opened on one side of the upper part of each of the two sliding rods 214. The limiting groove 215 can contact the outer wall of the limiting bead 216, ensuring that the limiting bead 216 can be smoothly engaged in the limiting groove 215, while ensuring that the limiting bead 216 will not completely fall out of the slot 2161, and ensuring that the limiting bead 216 can be smoothly disengaged from the slot 2161 when used again. The pins extend quickly from the slots 2161 without shifting. Each of the two positioning pins 213 has two symmetrically distributed slots 2161 at one end. The inner and outer diameters of the slots 2161 are different. The inner diameter is larger than the diameter of the limiting bead 216, ensuring that the limiting bead 216 can retract into the limiting groove 215. At the same time, the outer diameter of the slots 2161 is smaller than the diameter of the limiting bead 216, ensuring that the limiting bead 216 will not fall out through the slots 2161. The limiting bead 216 is slidably engaged in both slots 2161. The limiting bead 216 is made of hard alloy material, and its diameter accuracy is controlled within ±0.005mm. The inner wall of one side of each of the two positioning pins 213 has a threaded groove. One end of each of the two sliding rods 214 is rotatably mounted with a bolt 217. The two bolts 217 are threaded in the middle of one side of each positioning pin 213. By tightening the bolts 217, the precise displacement control of the sliding rod 214 can be achieved, with a displacement accuracy of 0.01mm.

[0027] The guide assembly 22 is located on the outside of the upper mold base 11 and is used to position the mold.

[0028] The guide assembly 22 includes two guide rods 221 fixedly installed on both sides of the upper mold base 11. The guide rods 221 adopt a hollow design to further reduce weight while ensuring strength. A second magnetic block 225 is fixedly installed on one side of each of the four guide rods 221. Two symmetrically distributed guide blocks 223 are fixedly installed on both sides of the lower mold base 1. A first magnetic block 224 is fixedly installed on the top of each of the four guide blocks 223 to cooperate with the second magnetic block 225. The first magnetic block 224 and the second magnetic block 225 adopt an electromagnetic structure of adsorption by electricity and demagnetization by demagnetization. They are equipped with a silicon steel sheet magnetic core with high magnetic permeability and a high-efficiency electromagnetic coil. When energized, they can generate a magnetic field to attract each other and ensure that the upper mold base 11 and the lower mold base 1 are tightly fitted.

[0029] The lower part of the lower mold base 1 has a cavity 212, and the core body 211 is slidably locked in the middle of the cavity 212. The inner wall of the cavity 212 is surface hardened to improve wear resistance and service life.

[0030] The lower part of the mold base 1 has two symmetrically distributed fixing grooves 2162. Multiple limiting beads 216 are slidably locked inside the fixing grooves 2162. At the same time, an elastic buffer layer made of polyurethane material is provided at the bottom of the fixing grooves 2162, which can play a buffering role when the limiting beads 216 are locked in, and avoid rigid collision.

[0031] Both positioning cavities 2132 have buffer pads 218 fixedly installed on their inner upper surfaces. The tops of both positioning pins 213 are in contact with the buffer pads 218. The buffer pads 218 are made of nitrile rubber, which has good oil resistance and impact resistance. During the injection molding process, they are used to continuously absorb the impact generated by the melt pressure fluctuations and protect the fitting accuracy between the positioning pins 213 and the positioning cavities 2132.

[0032] Each of the four guide rods 221 has a guide groove 222 in the middle. Multiple guide blocks 223 are slidably locked inside the corresponding guide grooves 222. When the upper mold base 11 descends, the guide blocks 223 slide along the guide grooves 222 to form a precision guide and ensure the coaxiality of the upper mold base 11 and the lower mold base 1.

[0033] Furthermore, any content not described in detail in this specification is existing technology known to those skilled in the art.

[0034] During operation, the core body 211 is aligned with the cavity 212 and the positioning pin 213 is aligned with the positioning cavity 2132. The core body 211 is then pushed into the cavity 212, and the positioning pin 213 is fully inserted into the cavity 212. At this time, the positioning pin 213 is in close contact with the buffer pad 218. By rotating the bolt 217, it moves outward from the positioning pin 213, while driving the sliding rod 214 to move in the sliding cavity 2131. The limiting bead 216 is positioned out of the slot 2161 by the inclined surface of the limiting groove 215, and is locked inside the fixing groove 2162, thereby fixing the positioning pin 213, thus completing the fixing operation of the positioning pin 213.

[0035] When the upper mold base 11 and the lower mold base 1 are closed, the injection molding machine drives the upper mold base 11 to move downward. The guide rod 221 descends with the upper mold base 11. When the guide rod 221 approaches the guide block 223, the first magnetic block 224 and the second magnetic block 225 come into contact with each other and generate attraction after being energized, which further fixes the upper mold base 11 and the lower mold base 1. At the same time as the upper mold base 11 descends, the guide block 223 slides along the guide groove 222 to form a precision guide and ensure the coaxiality of the upper mold base 11 and the lower mold base 1.

[0036] During the injection molding process, the buffer pad 218 is used to continuously absorb the impact generated by the melt pressure fluctuation, and protect the fitting accuracy of the positioning pin 213 and the positioning cavity 2132. When the mold is opened, the injection molding machine drives the upper mold base 11 to rise, the guide block 223 slides in the opposite direction along the guide groove 222, and at the same time, the first magnetic block 224 and the second magnetic block 225 are de-energized to separate them. The rotating bolt 217 moves the sliding rod 214 in the opposite direction, and the limit bead 216 exits the fixing groove 2162, so the core body 211 can be taken out for cleaning or replacement.

[0037] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0038] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A lightweight battery tray mold with a core reference positioning mechanism, comprising a lower mold base (1) and an upper mold base (11), characterized in that: The upper mold base (11) is disposed at the top of the lower mold base (1), and a guide positioning mechanism (2) is provided on one side of the lower mold base (1). The guide positioning mechanism (2) includes: The mounting assembly (21) includes a core body (211) located at the lower part of the lower mold base (1). Positioning pins (213) are fixedly mounted on both sides of the core body (211). Two symmetrically distributed positioning cavities (2132) are opened at the lower part of the lower mold base (1). Both positioning pins (213) are slidably engaged inside the positioning cavities (2132). A sliding cavity (2131) is opened in the middle of each of the two positioning pins (213), and a sliding rod (2131) is slidably engaged in the middle of each of the two sliding cavities (2131). 14) A limiting groove (215) is provided on one side of the upper part of each of the two sliding rods (214), and two symmetrically distributed slots (2161) are provided at one end of each of the two positioning pins (213). A limiting bead (216) is slidably engaged in each of the two slots (2161). A threaded groove is provided on one side of the inner wall of each of the two positioning pins (213). A bolt (217) is rotatably installed at one end of each of the two sliding rods (214), and the two bolts (217) are threadedly installed in the middle of one side of the positioning pin (213). A guide assembly (22) is disposed on the outside of the upper mold base (11) for positioning the mold.

2. The lightweight battery tray mold of the core reference positioning mechanism according to claim 1, characterized in that: The guide assembly (22) includes two guide rods (221) fixedly installed on both sides of the upper mold base (11), and a second magnetic block (225) fixedly installed on one side of each of the four guide rods (221). Two symmetrically distributed guide blocks (223) are fixedly installed on both sides of the lower mold base (1). A first magnetic block (224) that cooperates with the second magnetic block (225) is fixedly installed at the top of each of the four guide blocks (223).

3. The lightweight battery tray mold of the core reference positioning mechanism according to claim 1, characterized in that: The lower mold base (1) has a cavity (212) at its lower part, and the core body (211) is slidably locked in the middle of the cavity (212).

4. The lightweight battery tray mold of the core reference positioning mechanism according to claim 1, characterized in that: The lower mold base (1) has two symmetrically distributed fixing grooves (2162) at its lower part, and multiple limiting beads (216) are slidably locked inside the fixing grooves (2162).

5. A lightweight battery tray mold with a core reference positioning mechanism according to claim 1, characterized in that: The upper inner surfaces of the two positioning cavities (2132) are fixedly fitted with buffer pads (218), and the tops of the two positioning pins (213) are in contact with the buffer pads (218).

6. A lightweight battery tray mold with a core reference positioning mechanism according to claim 2, characterized in that: Each of the four guide rods (221) has a guide groove (222) in the middle, and multiple guide blocks (223) are slidably locked inside the corresponding guide grooves (222).

Images