Terminal automatic pre-pressing positioning device for insert injection mold

Abstract

The utility model discloses a kind of terminal automatic pull band pre-pressing positioning devices of insert injection mold, wherein, terminal pre-pressing positioning module includes the floating pre-pressing head installed in female die core, the minimum width of the limiting groove of this floating pre-pressing head is greater than the maximum width of the positioning rib provided on terminal 0.01~0.015mm;The groove entrance of the limiting groove is processed with the guiding port of upper wide and lower narrow;The center of floating pre-pressing head is provided with a length of 3mm long circular slide groove;One end of T-shaped slot guide pin connecting floating pre-pressing head and female die core is fixed end on female die core with interference fit, the other end is the pin shaft end passing through long circular slide groove;It also includes the spring energy storage component that abuts between floating pre-pressing head and female die core.This device solves the problem that terminal final positioning is unreliable in automated production, ensures the whole process automation coherent stability from feeding to clamping, realizes full automation production and effectively prevents the risk of pressing mould, significantly improves productivity and yield.

Description

Technical Field

[0001] This utility model relates to the field of insert injection mold technology, and in particular to a terminal pre-compression positioning system based on automatic material feeding strip. This system integrates automatic material feeding strip, precise terminal positioning, and pre-compression functions before mold closing, aiming to achieve fully automated production and effectively prevent mold compression risks. Background Technology

[0002] Currently, in the insert molding process, a strip conveyor is commonly used to automatically feed a series of terminals into the mold cavity. Existing technologies generally employ a "free-fall" positioning scheme, which relies on a robot or feeding device to cut the terminals off the strip and allow them to fall freely to a predetermined position in the mold core. This scheme has a simple structure, containing only basic cutting and unloading mechanisms.

[0003] However, this traditional method has significant drawbacks. First, the terminals are prone to shifting, tilting, or even becoming suspended during the descent due to unstable posture, making it impossible for them to fully adhere to the sealing surface of the male mold core. Second, when encountering slight dimensional differences or minor deformations between different batches of terminals, this "self-falling" structure cannot effectively adaptively compensate and correct deviations, directly resulting in poor terminal positioning accuracy.

[0004] The aforementioned defects can lead to serious consequences during mold closing: inaccurately positioned terminals can rigidly interfere with the rapidly closing male and female mold cores, causing mold-pressing accidents. This not only damages the expensive mold cores but also leads to production line downtime and high mold maintenance costs. Furthermore, to address this issue, the industry has attempted to use complex servo drive mechanisms for forced positioning, but this has resulted in technical biases such as complex mold structures, drastically increased manufacturing costs, and reduced reliability. Therefore, there is an urgent need in this field for an automated solution that is simple in structure, reliable, and capable of achieving precise pre-pressing positioning. Utility Model Content

[0005] To address the problems existing in the prior art, this utility model provides an automatic pre-pressing and positioning device for insert injection mold terminals. This device solves the problem of unreliable final positioning of terminals in automated production. With this device, after the material strip is conveyed and cut off from the terminal, it can be precisely pre-pressed and fixed immediately, ensuring that the entire process from feeding to mold closing is automated, continuous and stable without manual intervention. This achieves fully automated production and effectively prevents mold compression risks, significantly improving production capacity and yield.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: An automatic pre-compression positioning device for insert injection mold terminals includes a female mold core and a male mold core; characterized in that it further includes a terminal pre-compression positioning module integrated inside the female mold core; the terminal pre-compression positioning module includes: a floating pre-compression head installed in the female mold core, the working end of the floating pre-compression head having a limiting groove, the minimum width of the limiting groove being 0.01-0.015mm larger than the maximum width of the positioning ribs provided on the terminal; a guide opening that is wider at the top and narrower at the bottom is machined at the groove entrance of the limiting groove; a 3mm long elongated oval slide groove is provided at the center of the floating pre-compression head; a T-slot guide pin connecting the floating pre-compression head and the female mold core, one end of the T-slot guide pin being a fixed end that is interference-fitted on the female mold core, and the other end being a pin shaft end that passes through the elongated oval slide groove; and a spring energy storage assembly abutting between the floating pre-compression head and the female mold core.

[0007] In the aforementioned automatic pre-pressing positioning device for insert injection mold terminals, the opening angle of the guide opening of the floating pre-pressing head limiting groove is set to 80°.

[0008] Compared with the prior art, the technical solution provided by this utility model has the following beneficial effects: First, the automatic pull-belt pre-compression positioning device for insert injection mold terminals of this utility model has an integrated and elastic terminal pre-compression positioning module built into the female mold core side of the mold. After the automatic pull-belt system delivers the terminal to the predetermined position of the male mold core and before the mold closing action is completed, the terminal pre-compression positioning module can actively and accurately pre-compress and fix the terminal to the designated sealing surface of the male mold core, thereby ensuring mold closing safety and injection accuracy.

[0009] Secondly, the floating pre-compression head of this utility model, as a functional terminal that directly performs the pre-compression action, has a precision limiting groove designed at the front end of its working end. The limiting groove, which is in close contact with the positioning rib of the terminal, integrates a guide opening with an opening angle of 80°, ensuring that the terminal can be automatically guided, aligned and accurately inserted during the mold closing process, thus completing the initial positioning.

[0010] Thirdly, the T-slot guide pin of this utility model serves as the motion guide and stroke limit center of the floating preload head. It passes through the female mold core and is precisely embedded in a 3.0mm long elongated oval slide groove in the center of the floating preload head, forming a sliding pair. This strictly limits the movement of the floating preload head to within an axial stroke of 3mm, ensuring the accuracy and reliability of the bouncing action of the terminal preload positioning module of this utility model.

[0011] Fourth, the spring energy storage component of this utility model serves as the power source for the terminal pre-pressure positioning module. It not only provides a continuous and stable pre-pressure for the floating pre-pressure head, but also drives the floating pre-pressure head to accurately reset in the non-working state. It is the core of realizing the "bouncing" function of the entire terminal pre-pressure positioning module. Attached Figure Description

[0012] The accompanying drawings, which are included to provide a further understanding of the present invention and constitute a part of this invention, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings: Figure 1 This is a top view schematic diagram of the automatic pull-belt pre-compression positioning device for insert injection mold terminals of this utility model; Figure 2 yes Figure 1 AA sectional view Figure 1 Mold closed state; Figure 3 yes Figure 1 AA sectional view Figure 2 Mold open state; Figure 4 This is a schematic diagram of the main structure of the floating preload head of this utility model; Figure 5 This is a side view of the floating preload head of this utility model. Figure 6 yes Figure 5 A schematic diagram of the enlarged structure of part B; Figure 7 This is a bottom view structural schematic diagram of the automatic pull-belt pre-compression positioning device for insert injection mold terminals of this utility model. Detailed Implementation

[0013] To make the technical problem to be solved, the technical solution, and the beneficial effects of this utility model clearer and more understandable, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this utility model and are not intended to limit this utility model.

[0014] Unless otherwise expressly defined, the use of terms such as "first," "second," or "third" in the claims, description, and drawings of this utility model is for distinguishing different objects and not for describing a specific order.

[0015] Unless otherwise expressly defined, in the claims, description and accompanying drawings of this utility model, the use of directional terms such as "center", "lateral", "longitudinal", "horizontal", "vertical", "top", "bottom", "inner", "outer", "upper", "lower", "front", "rear", "left", "right", "clockwise", "counterclockwise" to indicate orientation or positional relationship is based on the orientation and positional relationship shown in the accompanying drawings, and is only for the convenience of describing this utility model and simplifying the description, and is not intended to indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the specific protection scope of this utility model.

[0016] Unless otherwise expressly defined, the terms "fixed connection" or "fixed connection" used in the claims, description and drawings of this utility model shall be interpreted broadly to refer to any connection in which there is no displacement or relative rotation relationship between the two parties, including non-removable fixed connection, detachable fixed connection, integral connection and fixed connection through other devices or components.

[0017] In the claims, description and accompanying drawings of this utility model, the terms "comprising", "having", and variations thereof are used to mean "including but not limited to".

[0018] Now combined Figures 1 to 3 As shown, the present invention describes an automatic pre-compression positioning device for insert injection mold terminals, including a female mold core 10 and a male mold core 60, and a set of terminal pre-compression positioning modules integrated inside the female mold core 10.

[0019] The terminal pre-compression positioning module of this utility model includes a floating pre-compression head 20, a T-slot guide pin 30, and a spring energy storage assembly 40.

[0020] Please structure Figures 4 to 7 As shown, the floating preload head 20 of this utility model is the functional execution terminal of the terminal preload positioning module. It adopts a cylindrical structure and is precisely assembled into the corresponding mounting hole of the female mold core 10. The working end of the floating preload head 20 is provided with a key limiting groove 20a. The minimum width of the limiting groove 20a is 0.01 to 0.015 mm larger than the maximum width of the positioning rib 50a provided on the terminal 50, so that the positioning rib 50a of the terminal 50 and the limiting groove 20a form a precise micro-gap fit. The limiting groove 20a has a guide opening 20b, which is wider at the top and narrower at the bottom, machined at its entrance. The opening angle of the guide opening 20b is set to 80°. The guide opening 20b with an 80° opening angle, and the limiting groove 20a, which has a slight clearance fit with the positioning rib 50a of the terminal 50, ensure that the positioning rib 50a of the terminal 50 can be efficiently guided to slide smoothly into and be locked in the center of the limiting groove 20a during the initial mold closing of the female mold core 10 and the male mold core 60, thus completing the initial radial positioning. The floating preload head 20 has an elongated oval groove 20c at its center, and the elongated oval groove 20c has a length of 3mm.

[0021] One end of the T-slot guide pin 30 of this utility model is a fixed end that is interference-fitted onto the female mold core 10, and the other end is a pin end that passes through the elongated oval slide groove 20c. The T-slot guide pin 30 connects the floating preload head 20 and the female mold core 10 into a whole, forming a precision sliding pair. The length of the elongated oval slide groove 20c of the floating preload head 20 of this utility model strictly limits the axial movement stroke of the floating preload head 20, that is, the bounce stroke of the terminal preload positioning module of this utility model is precisely set to 3mm.

[0022] The spring energy storage assembly 40 of this utility model serves as the power source for the terminal pre-compression positioning module. In this embodiment, a standard spring WHH4-15 is preferably used. The spring energy storage assembly 40 rests between the floating pre-compression head 20 and the female mold core 10 in this embodiment. In this embodiment, the spring energy storage assembly 40 is positioned between the blind hole at the rear end of the floating pre-compression head 20 and the base plate 10a of the female mold core 10. The spring energy storage assembly 40 continuously provides forward pre-compression force to the floating pre-compression head 20 and is responsible for driving the floating pre-compression head 20 to accurately reset after mold opening.

[0023] The terminal automatic pull-out system diagram does not show the process of conveying terminal 50 to the predetermined position of male mold core 60. When the mold closing action begins, the corresponding... Figure 3 In the mold-opening state, under the thrust of the spring energy storage assembly 40, the working end of the floating preload head 20 first contacts the terminal 50, which is still in a free state.

[0024] Under the continuous action of the mold closing power, the positioning rib 50a of the terminal 50 automatically corrects itself and enters the limiting groove 20a along the guide surface of the guide opening 20b with an opening angle of 80°, thus completing the radial limiting.

[0025] When the mold continues to close until the distance between the male mold core 60 and the female mold core 10 is less than 30.00 mm, the male mold core 60 generates a reaction force on the floating preload head 20 through the terminal 50. This reaction force overcomes the elastic force of the spring energy storage assembly 40, pushing the floating preload head 20 to slide backward along the T-slot guide pin 30 to compress the spring energy storage assembly. During this process, the limited terminal 50 is synchronously and smoothly pressed against the designated sealing surface 60a of the male mold core 60 until the terminal 50 is completely pressed and fixed, forming the molded product 70. The state at this time is as follows: Figure 2 The mold is in the closed state shown, after which injection molding can be performed.

[0026] After injection molding, the mold is opened. In the initial stage of mold opening, until the distance between the male mold core 60 and the female mold core 10 reaches 30.00mm again, the elastic force of the spring energy storage component 40 is always applied to the terminal 50 through the floating preload head 20, so that the terminal 50 is tightly attached to the male mold core 60. This "delayed return" design effectively resists the vacuum suction force that may be generated when the molded product 70 is removed from the female mold core 10, prevents the molded product 70 from being dragged and deformed, and ensures positioning accuracy.

[0027] Continue opening the mold until the distance between the male mold core 60 and the female mold core 10 exceeds 30.00 mm. Then, the floating preload head 20 disengages from the terminal 50 until the floating preload head 20 is fully reset under the action of the spring energy storage assembly 40. Subsequently, the ejection system operates to eject the molded product 70 and the terminal 50 together, completing the demolding process.

[0028] The molded product 70 is a plastic product, and the terminal 50 is a copper metal strip. The terminal 50 serves as a flow medium on the production line, used to fix and transport the molded product 70, carrying it for synchronous secondary transport and enabling secondary injection molding. When the terminal 50 is transported to the stamping and cutting machine, the molded product 70 is cut and falls onto the assembly line for collection and packaging. After completing its mission, the terminal 50 is recycled into a recycling bin.

[0029] The foregoing description illustrates and describes preferred embodiments of the present invention. As previously stated, it should be understood that the present invention is not limited to the forms disclosed herein and should not be construed as excluding other embodiments. It can be used in various other combinations, modifications, and environments, and can be altered within the scope of the inventive concept described herein through the foregoing teachings or related technical or knowledge. Any modifications and variations made by those skilled in the art that do not depart from the spirit and scope of the present invention should be within the protection scope of the appended claims.

Claims

1. An automatic pull-tab pre-compression positioning device for insert injection mold terminals, comprising a female mold core (10) and a male mold core (60); characterized in that, It also includes a terminal pre-compression positioning module integrated inside the female mold core (10); the terminal pre-compression positioning module includes: A floating preload head (20) is installed inside the female mold core (10). The working end of the floating preload head (20) is provided with a limiting groove (20a). The minimum width of the limiting groove (20a) is 0.01 to 0.015 mm larger than the maximum width of the positioning rib (50a) provided on the terminal (50). A guide opening (20b) that is wider at the top and narrower at the bottom is machined at the groove entrance of the limiting groove (20a). A long oval groove (20c) with a length of 3 mm is provided at the center of the floating preload head (20). A T-slot guide pin (30) connects the floating preload head (20) and the female mold core (10). One end of the T-slot guide pin (30) is a fixed end that is interference-fitted onto the female mold core (10), and the other end is a pin end that passes through the elongated oval slide groove (20c). It also includes... The spring energy storage assembly (40) is abutted between the floating preload head (20) and the female mold core (10).

2. The automatic pull-tab pre-compression positioning device for insert injection mold terminals according to claim 1, characterized in that, The opening angle of the guide port (20b) of the limiting groove (20a) of the floating preload head (20) is set to 80°.

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