Positioning device for injection mold of power tool housing

Abstract

This utility model discloses a positioning device for an injection mold of a power tool housing, including a first extrusion mold, a second extrusion mold disposed on one side of the first extrusion mold, a lifting ring fixedly connected to the first and second extrusion molds, and a limiting mold disposed inside the first extrusion mold. It can flexibly adjust the supporting force according to dynamic stress, thermal expansion and contraction, or filling pressure impact during the molding process, effectively buffering and compensating to avoid mold misalignment and reduce quality problems such as flash and uneven wall thickness. Furthermore, it improves adaptability and versatility, being compatible with multiple housing models, material switching, and different equipment characteristics, adapting to different working conditions through precise adjustment. The telescopic inner shell slide groove and the limiting fixing ring ensure adjustment stability; after wear, the fitting clearance can be adjusted to compensate for the wear, delaying the deterioration of positioning accuracy, avoiding secondary damage such as guide post bending and mold cracking, extending mold life, reducing debugging costs, and improving production stability.

Description

Technical Field

[0001] This utility model relates to the field of injection molding technology for housings, specifically a positioning device for injection molds of power tool housings. Background Technology

[0002] The housing of a power tool is a component that encloses the power tool, protecting, supporting, and decorating its internal parts. In the injection molding production of power tool housings, the mold positioning device is a key structure that ensures precise alignment and prevents misalignment of all mold components during mold closing, molding, and opening. It directly affects the dimensional accuracy, appearance quality, and mold lifespan of the product, and is one of the core elements of complex housing mold design.

[0003] In existing technologies, traditional positioning devices for injection molds of power tool housings cannot adjust the support force during use, lack dynamic adaptability, and are difficult to cope with dynamic stress and deformation during the molding process. When clamping force fluctuates, or when there is thermal expansion and contraction or filling pressure impact, the fixed support structure cannot buffer or compensate, easily leading to mold misalignment and causing quality problems such as flash, uneven wall thickness, and out-of-tolerance critical assembly features. These devices have extremely poor adaptability, unable to accommodate multiple housing models, material changes, or different equipment characteristics, limiting the mold's versatility. After wear, the inability to compensate leads to increased clearance and a sharp drop in support force, not only accelerating the deterioration of positioning accuracy but also potentially causing secondary damage such as guide post bending and mold cracking due to forced use, significantly shortening mold life. Furthermore, the lack of an overload buffer mechanism easily leads to rigid mold damage and equipment accidents, while also resulting in poor production consistency, significantly increased debugging costs, and seriously affecting production stability. Utility Model Content

[0004] The purpose of this invention is to provide a positioning device for injection molds of power tool housings, in order to solve the problem mentioned in the background art that the positioning device for injection molds of power tool housings, which cannot adjust the support force, is unable to cope with dynamic stress and deformation during the molding process, thus accelerating the deterioration of positioning accuracy and affecting production stability.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a positioning device for an injection mold of an electric tool housing, comprising a first extrusion mold, a second extrusion mold disposed on one side of the first extrusion mold, a lifting ring fixedly connected to the first extrusion mold and the second extrusion mold, a limiting mold disposed inside the first extrusion mold, a mounting base fixedly connected to the second extrusion mold, a guide assembly disposed between the first extrusion mold and the second extrusion mold, an installation assembly disposed between the first extrusion mold and the second extrusion mold, a telescopic housing fixedly connected to the inner side of the first extrusion mold, a telescopic inner housing slidably connected inside the telescopic housing, a rotating handle rotatably connected inside the first extrusion mold, a rotating threaded rod fixedly connected to the rotating handle, an adjusting threaded block threadedly connected to the rotating handle, a sliding limiting rod slidably connected inside the telescopic inner housing, a first return spring fixedly connected between the sliding limiting rod and the adjusting threaded block, and a limiting fixing ring fixedly connected to the sliding limiting rod. By rotating the rotating handle, the rotating threaded rod is driven to rotate inside the first extrusion mold. Under the condition that the adjusting threaded block is threadedly connected to the rotating threaded rod, the adjusting threaded block is driven to slide inside the telescopic housing.

[0006] In the preferred embodiment of this technical solution, the telescopic housing has a groove at the corresponding position of the adjusting threaded block, and the adjusting threaded block slides inside the groove.

[0007] In the preferred embodiment of this technical solution, the telescopic inner shell has a groove at the corresponding position of the sliding limit rod, and the sliding limit rod slides inside the groove.

[0008] According to the preferred embodiment of this technical solution, the guide assembly includes a sliding push rod slidably connected inside the mounting base, a limiting ring and a fixed mounting ring fixedly connected to the sliding push rod, a second return spring fixedly connected between the mounting base and the limiting ring, and an insert block fixedly connected to the first extrusion die.

[0009] In the preferred embodiment of this technical solution, there are two sliding push rods, and the two sliding push rods are symmetrically slidably connected inside the mounting base.

[0010] Based on the preferred embodiment of this technical solution, the installation components include a sliding limiting block that is snapped into the first extrusion mold, a fixing bolt that is threaded into the sliding limiting block, a support connecting seat that is fixedly connected to the sliding limiting block, a limiting mold and a mounting fixing seat that are disposed on the second extrusion mold, a limiting extrusion plate disposed between the first limiting block and the support fixing block, a second limiting block and a forming mold that are slidably connected inside the first extrusion mold and the support connecting seat, a limiting guide groove that is opened inside the first extrusion mold, and an extrusion mold that is fixedly connected to the second extrusion mold.

[0011] Based on the preferred embodiment of this technical solution, a plurality of sliding limit blocks are provided, and the plurality of sliding limit blocks are evenly engaged inside the first extrusion mold.

[0012] In the preferred embodiment of this technical solution, a slot is provided between the second limiting block and the forming mold at the corresponding position of the limiting extrusion plate, and the limiting extrusion plate is engaged inside the slot.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] 1. By rotating the handle, the rotating threaded rod is driven to rotate. Combined with the constraint of the adjusting threaded block and the sliding groove of the telescopic outer shell, the rotational motion is converted into linear sliding. The first return spring pushes the sliding limit rod to achieve dynamic adjustment. The support force can be flexibly adjusted according to dynamic stress, thermal expansion and contraction, or filling pressure impact during the molding process, effectively buffering and compensating to avoid template misalignment and reduce quality problems such as flash and uneven wall thickness. Secondly, it improves adaptability and versatility. It can be compatible with multiple shell models, material switching, and different equipment characteristics, adapting to different working conditions through precise adjustment. Furthermore, the sliding groove of the telescopic inner shell and the limiting fixing ring ensure adjustment stability. After wear, the fitting clearance can be adjusted to compensate for the wear, delaying the deterioration of positioning accuracy, avoiding secondary damage such as guide post bending and template cracking, extending mold life, reducing debugging costs, and improving production stability.

[0015] 2. The sliding limit block is connected to the first extrusion mold via a snap-fit ​​fixing bolt, allowing for quick fixing and disassembly without complex operations. This significantly reduces the time and cost of mold replacement or maintenance, effectively solving the problem of cumbersome installation in traditional devices. Secondly, it offers outstanding support stability and force balance. Several sliding limit blocks are evenly distributed inside the first extrusion mold, ensuring uniform distribution of support force and preventing mold deformation caused by localized force concentration. The support connecting seat provides stable support for the second limit block and the forming mold, significantly enhancing the overall rigidity of the mold. Furthermore, it boasts excellent positioning accuracy and compatibility. The limit extrusion plate snaps into the slots of the second limit block and the forming mold, forming a tight mechanical fit. Combined with the limit guide groove, it ensures accurate positioning under different working conditions, is compatible with the production of multiple shell models, and can extend its service life by adjusting the components to compensate for gaps after wear. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of one embodiment of the positioning device for the injection mold of the power tool housing according to this utility model;

[0017] Figure 2 This is a schematic diagram of the second extrusion die structure of this utility model;

[0018] Figure 3 This is a schematic diagram of the internal structure of the first extrusion die of this utility model;

[0019] Figure 4 This is a schematic diagram of the mounting bracket structure of this utility model;

[0020] Figure 5 This is a schematic diagram of the sliding limit block structure of this utility model;

[0021] Figure 6 This is a schematic diagram of the installation component structure of this utility model.

[0022] In the diagram: 1. First extrusion die; 2. Second extrusion die; 3. Lifting ring; 4. Limiting die; 5. Mounting base; 801. Telescopic outer shell; 802. Telescopic inner shell; 803. Rotating handle; 804. Rotating threaded rod; 805. Adjusting threaded block; 806. First return spring; 807. Sliding limiting rod; 808. Limiting fixing ring; 809. Insert block; 810. Sliding push rod; 811. Limiting ring; 812. Fixed mounting ring; 813. Second return spring; 901. Sliding limiting block; 902. Fixing bolt; 903. Support connecting seat; 904. First limiting block; 905. Support fixing block; 906. Limiting extrusion plate; 907. Second limiting block; 908. Forming die; 909. Limiting guide groove; 910. Extrusion die. Detailed Implementation

[0023] 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.

[0024] Please see Figure 1-6This utility model provides an embodiment including a first extrusion mold 1, a second extrusion mold 2 disposed on one side of the first extrusion mold 1, a lifting ring 3 fixedly connected to the first extrusion mold 1 and the second extrusion mold 2, a limiting mold 4 disposed inside the first extrusion mold 1, a mounting base 5 fixedly connected to the second extrusion mold 2, a guide assembly disposed between the first extrusion mold 1 and the second extrusion mold 2, a mounting assembly disposed between the first extrusion mold 1 and the second extrusion mold 2, a telescopic outer shell 801 fixedly connected to the inner side of the first extrusion mold 1, a telescopic inner shell 802 slidably connected inside the telescopic outer shell 801, and a rotating handle 800 rotatably connected inside the first extrusion mold 1. 03. A rotating threaded rod 804 fixedly connected to the rotating handle 803, an adjusting threaded block 805 threadedly connected to the rotating handle 803, a sliding limit rod 807 slidably connected inside the telescopic inner shell 802, a first return spring 806 fixedly connected between the sliding limit rod 807 and the adjusting threaded block 805, and a limiting fixing ring 808 fixedly connected to the sliding limit rod 807. By rotating the rotating handle 803, the rotating threaded rod 804 is driven to rotate inside the first extrusion mold 1. Under the condition that the adjusting threaded block 805 is threadedly connected to the rotating threaded rod 804, the adjusting threaded block 805 is driven to slide inside the telescopic outer shell 801.

[0025] By rotating the rotating handle 803 on the first extrusion die 1, the rotating threaded rod 804, which is fixedly connected to it, is driven to rotate synchronously inside the first extrusion die 1. Since the adjusting threaded block 805 is connected to the rotating threaded rod 804 by threads, and the slide groove opened in the telescopic housing 801 at the corresponding position of the adjusting threaded block 805 restricts the rotational freedom of the adjusting threaded block 805, the rotational motion of the rotating threaded rod 804 is converted into the linear sliding of the adjusting threaded block 805 along the slide groove of the telescopic housing 801.

[0026] Please see Figure 3-4 A further solution based on this embodiment is as follows: the telescopic housing 801 has a groove at the corresponding position of the adjusting threaded block 805, and the adjusting threaded block 805 slides inside the groove. By opening the groove at the position of the telescopic housing 801 corresponding to the adjusting threaded block 805, the adjusting threaded block 805 is constrained by the trajectory of the groove during the sliding process, thus avoiding the lateral displacement or jamming of the adjusting threaded block 805 due to the driving force of the rotating threaded rod 804.

[0027] Please see Figure 3-4A further solution based on this embodiment is as follows: a groove is provided on the telescopic inner shell 802 at the position corresponding to the sliding limit rod 807, and the sliding limit rod 807 slides inside the groove. By providing a groove on the telescopic inner shell 802 at the position corresponding to the sliding limit rod 807, a precise guiding path is provided for the sliding of the sliding limit rod 807, ensuring that the sliding limit rod 807 will not deviate or tilt when moving inside the telescopic inner shell 802, and ensuring that the limiting direction of the sliding limit rod 807 on the mold is accurate.

[0028] Please see Figure 3-4 A further solution based on this embodiment is as follows: the guide assembly includes a sliding push rod 810 slidably connected inside the mounting base 5, a limiting ring 811 and a fixed mounting ring 812 fixedly connected to the sliding push rod 810, a second return spring 813 fixedly connected between the mounting base 5 and the limiting ring 811, and an insert block 809 fixedly connected to the first extrusion mold 1. By setting the guide assembly composed of the sliding push rod 810, the limiting ring 811, the fixed mounting ring 812, the second return spring 813 and the insert block 809, when the first extrusion mold 1 and the second extrusion mold 2 are closed, the insert block 809 can accurately push the sliding push rod 810 to slide within the mounting base 5, and the limiting ring 811 can limit the sliding stroke of the sliding push rod 810.

[0029] Please see Figure 3-4 A further solution based on this embodiment is as follows: two sliding push rods 810 are provided, and the two sliding push rods 810 are symmetrically slidably connected inside the mounting base 5. By symmetrically slidably connecting the two sliding push rods 810 inside the mounting base 5, when the first extrusion mold 1 and the second extrusion mold 2 are closed, the force exerted by the insert block 809 on the sliding push rod 810 can be evenly distributed on both sides, avoiding deformation or guide offset of the mounting base 5 caused by excessive force on one side.

[0030] Please see Figure 5-6A further embodiment of this solution includes: a sliding limiting block 901 snapped into the first extrusion mold 1, a fixing bolt 902 threaded into the sliding limiting block 901, a support connecting seat 903 fixedly connected to the sliding limiting block 901, a limiting mold 4 and a mounting fixing seat 5 disposed on the second extrusion mold 2, a limiting extrusion plate 906 disposed between the first limiting block 904 and the support fixing block 905, and a second limiting block 907 and a forming mold 908 slidably connected inside the first extrusion mold 1 and the support connecting seat 903. The limiting guide groove 909 is formed inside the first extrusion mold 1, and the extrusion mold 910 is fixedly connected to the second extrusion mold 2. By setting an installation assembly consisting of a sliding limiting block 901, a fixing bolt 902, and a support connecting seat 903, the sliding limiting block 901 is quickly fixed to the first extrusion mold 1 by engaging with the fixing bolt 902. The support connecting seat 903 provides stable support for the second limiting block 907 and the forming mold 908. The limiting extrusion plate 906 enhances the connection stability between the first limiting block 904 and the support fixing block 905.

[0031] Please see Figure 5-6 A further solution based on this embodiment is as follows: a plurality of sliding limit blocks 901 are provided, and the plurality of sliding limit blocks 901 are evenly engaged inside the first extrusion mold 1. By evenly engaging the plurality of sliding limit blocks 901 inside the first extrusion mold 1, the supporting force of the sliding limit blocks 901 on the first extrusion mold 1 is more evenly distributed, avoiding deformation of the first extrusion mold 1 caused by local force concentration. At the same time, the evenly distributed sliding limit blocks 901 enhance the connection strength between the mounting component and the first extrusion mold 1.

[0032] Please see Figure 5-6 A further solution based on this embodiment is as follows: a slot is provided between the second limiting block 907 and the forming mold 908 at the corresponding position of the limiting extrusion plate 906. The limiting extrusion plate 906 is engaged inside the slot. By providing a slot between the second limiting block 907 and the forming mold 908 at the position corresponding to the limiting extrusion plate 906, a tight mechanical fit can be formed when the limiting extrusion plate 906 is engaged in the slot. This effectively limits the relative displacement between the second limiting block 907 and the forming mold 908, and avoids loosening or misalignment of the mold due to vibration or pressure during operation.

[0033] Working principle: Rotating the handle 803 on the first extrusion mold 1 drives the rotating threaded rod 804 to rotate. Because the adjusting threaded block 805 is threadedly connected to the rotating threaded rod 804 and is constrained by the sliding groove of the telescopic outer shell 801, the rotational motion is converted into linear sliding of the adjusting threaded block 805. It pushes the sliding limit rod 807 through the first return spring 806, precisely extending and retracting under the guidance of the sliding groove of the telescopic inner shell 802. The limiting fixing ring 808 enhances stability and achieves positioning tightness adjustment. When the mold is closed, the guide assembly is activated: the insert block 809 of the first extrusion mold 1 pushes the sliding push rod 810 in the mounting base 5 of the second extrusion mold 2 to slide. The limiting ring 811 limits the stroke, and the symmetrically arranged double sliding push rods 810 ensure balanced force. After the mold is closed, the second return spring 813 drives the push rod to return to its original position. The mounting assembly fixes the first extrusion mold 1 through the sliding limit block 901 and the fixing bolt 902. The support connecting seat 903 carries the second limit block 907 and the forming mold 908. The limiting extrusion plate 906 is inserted into the slot and combined with the limiting guide groove 909 to prevent the mold from vibrating and loosening, and to ensure the positioning accuracy and structural stability during injection molding.

[0034] 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 positioning device for an injection mold of a power tool housing, comprising a first extrusion mold (1), characterized in that: It also includes a second extrusion mold (2) disposed on one side of the first extrusion mold (1), a lifting ring (3) fixedly connected to the first extrusion mold (1) and the second extrusion mold (2), a limiting mold (4) disposed inside the first extrusion mold (1), a mounting base (5) fixedly connected to the second extrusion mold (2), a guide assembly disposed between the first extrusion mold (1) and the second extrusion mold (2), a mounting assembly disposed between the first extrusion mold (1) and the second extrusion mold (2), a telescopic outer shell (801) fixedly connected to the inside of the first extrusion mold (1), a telescopic inner shell (802) slidably connected to the inside of the telescopic outer shell (801), a rotating handle (803) rotatably connected to the inside of the first extrusion mold (1), and a rotating handle (803) fixedly connected to the rotating handle. The rotating threaded rod (804) on the handle (803), the adjusting threaded block (805) threadedly connected to the rotating handle (803), the sliding limit rod (807) slidably connected inside the telescopic inner shell (802), the first return spring (806) fixedly connected between the sliding limit rod (807) and the adjusting threaded block (805), and the limiting fixing ring (808) fixedly connected to the sliding limit rod (807) drive the rotating threaded rod (804) to rotate inside the first extrusion mold (1) by rotating the rotating handle (803), and drive the adjusting threaded block (805) to slide inside the telescopic outer shell (801) under the condition that the adjusting threaded block (805) is threadedly connected to the rotating threaded rod (804).

2. The positioning device for the injection mold of the power tool housing according to claim 1, characterized in that: The telescopic housing (801) has a groove at the corresponding position of the adjusting threaded block (805), and the adjusting threaded block (805) slides inside the groove.

3. The positioning device for the injection mold of the power tool housing according to claim 1, characterized in that: The telescopic inner shell (802) has a groove at the corresponding position of the sliding limit rod (807), and the sliding limit rod (807) slides inside the groove.

4. The positioning device for the injection mold of the power tool housing according to claim 1, characterized in that: The guide assembly includes a sliding push rod (810) slidably connected inside the mounting base (5), a limiting ring (811) and a fixed mounting ring (812) fixedly connected to the sliding push rod (810), a second return spring (813) fixedly connected between the mounting base (5) and the limiting ring (811), and an insert block (809) fixedly connected to the first extrusion die (1).

5. The positioning device for the injection mold of the power tool housing according to claim 4, characterized in that: There are two sliding push rods (810), and the two sliding push rods (810) are symmetrically slidably connected inside the mounting base (5).

6. The positioning device for the injection mold of the power tool housing according to claim 1, characterized in that: The mounting assembly includes a sliding limit block (901) snapped into the first extrusion die (1), a fixing bolt (902) threaded into the sliding limit block (901), a support connecting seat (903) fixedly connected to the sliding limit block (901), a limit die (4) and a mounting fixing seat (5) set on the second extrusion die (2), a limit extrusion plate (906) set between the first limit block (904) and the support fixing block (905), a second limit block (907) and a forming die (908) slidably connected inside the first extrusion die (1) and the support connecting seat (903), a limit guide groove (909) opened inside the first extrusion die (1), and an extrusion die (910) fixedly connected to the second extrusion die (2).

7. The positioning device for the injection mold of the power tool housing according to claim 6, characterized in that: Several sliding limit blocks (901) are provided, and the several sliding limit blocks (901) are evenly engaged inside the first extrusion mold (1).

8. The positioning device for injection mold of power tool housing according to claim 6, characterized in that: The second limiting block (907) and the forming mold (908) have a slot at the corresponding position of the limiting extrusion plate (906), and the limiting extrusion plate (906) is engaged inside the slot.

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