A high-efficiency small circuit breaker shell injection mold

Abstract

The utility model discloses a high -efficient small -size circuit breaker shell injection mold, including upper die seat, static template etc, upper and lower die kernel is equipped with mould cavity, and upper die seat is equipped with injection port, still is equipped with injection block. The mould cavity is divided into the middle forming area and the left and right forming area of both ends, and the import of injection block communicates with the injection port, and its left and right export is connected with the import through the "I" type channel, and the middle export communicates with the import through the "F" type channel. The mold passes through the special channel structure of multiple export injection block, and makes the plastic melt multidirectional injection into the mould cavity, shortens the flow distance, improves the filling speed, and the "I" type and "F" type channel reasonable collocation ensure that the melt evenly fills, reduces the forming defect, reduces the equipment pressure requirement, reduces the loss, improves production efficiency and product quality, reduces the production cost, enhances the mold applicability and economic benefit.

Description

Technical Field

[0001] This utility model relates to the field of injection mold technology, specifically to a high-efficiency miniature circuit breaker housing injection mold. Background Technology

[0002] In the field of power equipment, miniature circuit breakers (MCBs) are key components ensuring the safe operation of circuits, and the quality and performance of their housings directly affect the overall reliability of the circuit breakers. Injection molds are the core tools for producing MCB housings; the mold's structural design and injection molding method determine the product's molding quality and production efficiency.

[0003] Existing injection molds for miniature circuit breaker housings typically employ a single injection channel for molding the mold cavity. This traditional structure has significant drawbacks. Firstly, the single injection channel results in a longer and more uneven flow path for the molten plastic within the mold cavity, leading to variations in filling speed and pressure across different areas. This, in turn, affects product molding quality, easily causing defects such as uneven wall thickness, shrinkage, and material shortages. Secondly, the single injection method results in a longer filling time for the molten plastic within the mold cavity, and a correspondingly longer cooling and solidification cycle, severely restricting production efficiency and making it difficult to meet the growing market demand. Therefore, there is an urgent need to improve the structure and injection method of miniature circuit breaker housing injection molds to enhance injection efficiency and product quality. Utility Model Content

[0004] In view of the shortcomings in the prior art, this utility model provides a high-efficiency miniature circuit breaker housing injection mold.

[0005] The technical solution adopted by this utility model is: a high-efficiency miniature circuit breaker housing injection mold, including an upper mold base, a static mold plate, a moving mold plate, a lower mold base, an upper mold core, and a lower mold core. The upper mold core and the lower mold core are disposed between the static mold plate and the moving mold plate, and a mold cavity for molding the product is provided between the upper mold core and the lower mold core. An injection port is provided on the upper mold base, and an injection block is also provided for injection molding the mold cavity. The mold cavity is divided into a middle molding area and a left molding area and a right molding area located at both ends of the middle molding area. The inlet of the injection block is connected to the injection port. The injection block is provided with a middle outlet, a left outlet, and a right outlet that are respectively connected to the middle molding area, the left molding area, and the right molding area. The left outlet and the right outlet are connected to the inlet through a straight channel, and the middle outlet is connected to the inlet through a U-shaped channel.

[0006] Furthermore, the injection block has a "T" shaped structure, and the template of the upper mold base is provided with an installation groove that matches the shape of the injection block.

[0007] Further, the middle forming area, the left forming area, and the right forming area are arranged in a "one" shape. Each forming area is provided with four forming cavities for forming the circuit breaker housing, and the four forming cavities are distributed in a "field" shape.

[0008] Further, injection molding docking ports are provided in the middle of the middle forming area, the left forming area, and the right forming area. The injection molding docking ports of the middle forming area, the left forming area, and the right forming area are respectively connected to the middle outlet, the left outlet, and the right outlet through injection molding pipes.

[0009] Further, lifting rings are threadedly connected to the four corners of the upper mold base.

[0010] Further, annular grooves are provided on both ends and both sides of the middle of the injection molding block, and heating wires are provided in the annular grooves.

[0011] The beneficial effects of the present utility model are as follows:

[0012] First, by providing an injection molding block with multiple outlets, the mold cavity is divided into a middle forming area, a left forming area, and a right forming area, and communication channels with different shapes are designed specifically, enabling the plastic melt to be injected into the mold cavity from multiple directions simultaneously, greatly shortening the flow distance of the melt in the mold cavity, effectively improving the filling speed, and thus significantly enhancing the injection molding efficiency and reducing the production cycle.

[0013] Second, the reasonable combination of the "one" - shaped channel and the "匚" - shaped channel enables the plastic melt to fill each area of the mold cavity more evenly, effectively avoiding problems such as filling speed and pressure differences caused by uneven flow paths in traditional single - injection channels, ensuring the wall thickness uniformity of each part of the product, reducing the generation of molding defects such as shrinkage and material shortage, and greatly improving the molding quality and qualification rate of the product.

[0014] In addition, the design of this multi - outlet injection molding block and special channel structure reduces the requirements for the pressure of the injection molding equipment. While ensuring product quality, it can also reduce equipment wear, lower production costs, enhance the applicability and economic benefits of the mold in actual production, and provide strong guarantee for the efficient and high - quality production of small circuit breaker housings.

[0015] In addition to the purposes, features, and advantages described above, the present utility model has other purposes, features, and advantages. The following will refer to the attached drawings for a further detailed description of the present utility model. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the present utility model.

[0017] Figure 2 It is a cross - sectional schematic diagram of the present utility model.

[0018] Figure 3 Schematic structural diagram of the template.

[0019] Figure 4 Schematic structural diagram of the upper mold core, lower mold core and injection block.

[0020] Figure 5 Schematic separation diagram of the upper mold core and the lower mold core.

[0021] Figure 6 Schematic structural diagram of the injection block.

[0022] Figure 7 Schematic cross-sectional diagram of the "one" character channel of the injection block.

[0023] Figure 8 Schematic cross-sectional diagram of the "U" shaped channel of the injection block. Specific implementation mode

[0024] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0025] It should be noted that if there are directional indications (such as up, down, left, right, front, back...) involved in the embodiments of the present utility model, then the directional indications are only used to explain the relative positional relationship and movement conditions between components in a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, then the directional indications will also change accordingly.

[0026] The present utility model provides an injection mold for a high-efficiency miniature circuit breaker housing.

[0027] In this embodiment, referring to Figure 1-8 , the injection mold for the high-efficiency miniature circuit breaker housing includes an upper mold base 1, a static template 2, a moving template 3, a lower mold base 4, an upper mold core 5 and a lower mold core 6. The upper mold core 5 and the lower mold core 6 are arranged between the static template and the moving template. There is a mold cavity 7 for molding products between the upper mold core and the lower mold core. An injection port 8 is arranged on the upper mold base. It further includes an injection block 9 for injecting into the mold cavity. The mold cavity is divided into a middle molding area 10 and left and right molding areas 11 and 12 located at both ends of the middle molding area. The inlet 13 of the injection block is connected to the injection port. The injection block is provided with a middle outlet 14, a left outlet 15 and a right outlet 16 respectively connected to the middle molding area, the left molding area and the right molding area. The left outlet and the right outlet are connected to the inlet through a "one" character channel 17, and the middle outlet is connected to the inlet through a "U" shaped channel 18.

[0028] In the above technical solution, by setting up a multi-outlet injection block and a special channel structure, the plastic melt is distributed from a single inlet to three molding zones: center, left, and right. A combination of straight and U-shaped channels is used to balance the melt flow path in each zone. This achieves simultaneous injection molding in multiple zones, shortens the melt flow distance, improves filling speed and uniformity, reduces molding defects, and enhances production efficiency and product quality.

[0029] Specifically, the injection block has a "T" shaped structure, and the template 26 of the upper mold base is provided with an installation groove 19 that matches the shape of the injection block.

[0030] In this embodiment, a "T"-shaped injection block and a matching mounting groove 19 are used to ensure that the injection block is firmly embedded in the upper mold base, achieving precise positioning and sealed connection.

[0031] Specifically, the middle forming area, left forming area and right forming area are arranged in a straight line, and each forming area is provided with four forming cavities 20 for forming the circuit breaker housing. The four forming cavities 20 are distributed in a grid pattern.

[0032] In this embodiment, the mold cavity is divided into three molding zones arranged in a straight line. Each zone contains four molding cavities arranged in a grid pattern, forming a one-in-12-out cavity mold layout. This enables simultaneous injection molding of multiple products, optimizes space utilization, significantly improves production efficiency, and reduces the cost per unit.

[0033] Specifically, the middle molding area, left molding area and right molding area are provided with injection interface 21, and the injection interface 21 of the middle molding area, left molding area and right molding area are respectively connected to the middle outlet, left outlet and right outlet through injection tube 22.

[0034] In this embodiment, an injection interface is provided in the center of each molding zone, which is connected to the injection block outlet through an injection tube, allowing the melt to diffuse and fill from the center outwards. This further shortens the melt flow path, reduces pressure loss, ensures consistent filling of each molding cavity, and improves product dimensional accuracy.

[0035] Specifically, lifting rings 23 are threaded onto the four corners of the upper mold base.

[0036] In this embodiment, lifting rings are threaded at the four corners of the upper mold base to provide lifting points, which facilitates the installation, disassembly and transportation of the mold.

[0037] Specifically, annular grooves 24 are provided at both ends and on both sides of the middle of the injection block, and heating wires 25 are provided in the annular grooves 24.

[0038] In this embodiment, annular grooves and heating wires are provided at key locations on the injection block to achieve localized temperature control of the melt flow path. This compensates for melt cooling losses, maintains melt fluidity, and avoids material shortages caused by premature solidification, making it particularly suitable for molding thin-walled products.

[0039] Attention all technical personnel: Although this utility model has been described according to the specific embodiments above, the concept of this utility model is not limited to this utility model. Any modification that utilizes the concept of this utility model will be included within the scope of protection of this patent right.

Claims

1. A high-efficiency miniature circuit breaker housing injection mold, comprising an upper mold base, a stationary mold plate, a movable mold plate, a lower mold base, an upper mold core, and a lower mold core, wherein the upper mold core and the lower mold core are disposed between the stationary mold plate and the movable mold plate, and a mold cavity for molding the product is provided between the upper mold core and the lower mold core, and an injection port is provided on the upper mold base, characterized in that: It further includes an injection block for injecting into the mold cavity. The mold cavity is divided into a middle forming area, a left forming area and a right forming area located at both ends of the middle forming area. The inlet of the injection block is communicated with the injection port. The injection block is provided with a middle outlet, a left outlet and a right outlet which are respectively communicated with the middle forming area, the left forming area and the right forming area. The left outlet and the right outlet are communicated with the inlet through a "one" - shaped channel, and the middle outlet is communicated with the inlet through a "C" - shaped channel.

2. The high-efficiency miniature circuit breaker housing injection mold according to claim 1, characterized in that: The injection block is of a "T" - shaped structure, and an installation groove matching the shape of the injection block is arranged on the template of the upper mold base.

3. The high-efficiency miniature circuit breaker housing injection mold according to claim 1, characterized in that: The middle forming area, the left forming area and the right forming area are arranged in a "one" - shaped pattern, and four forming cavities for forming the circuit breaker housing are arranged in each forming area, and the four forming cavities are distributed in a "field" - shaped pattern.

4. The high-efficiency miniature circuit breaker housing injection mold according to claim 3, characterized in that: Injection docking ports are arranged in the middle of the middle forming area, the left forming area and the right forming area. The injection docking ports of the middle forming area, the left forming area and the right forming area are respectively communicated with the middle outlet, the left outlet and the right outlet through injection pipes.

5. The high-efficiency miniature circuit breaker housing injection mold according to claim 1, characterized in that: Lifting rings are thread - connected to the four corners of the upper mold base.

6. The high-efficiency miniature circuit breaker housing injection mold according to claim 2, characterized in that: Annular grooves are arranged at both ends and on both sides of the middle part of the injection block, and heating wires are arranged in the annular grooves.

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