Wired injection molding anti-deformation under-screen device and process

Abstract

The invention discloses a strip line injection molding anti-deformation bottom leakage device. A wire assembly supporting device is arranged on an injection molding cavity and an injection mold; the wire assembly supporting device extends into the injection molding cavity and is used for supporting a wire in the injection molding cavity, so that the wire resists the pressure impact of the injection molding and does not deform; before injection molding is completely cured, the wire assembly supporting device retreats from the injection molding cavity, so that the wire and the injection molding part are cured into an integrated structure; a line injection molding anti-deformation under-screen technology comprises the following steps that firstly, before injection molding or before injection molding materials abut against a wire, an abutting piece abuts against the wire, so that the wire resists impact of the injection molding materials and does not deform; the abutting piece abuts against the wire through at least one cylindrical part or at least one ejector pin part. The abutting piece supports the wire through a plurality of abutting surfaces or abutting points. 2, before injection molding is completely cured, the abutting piece retreats to the surface of an injection molding product; and thirdly, injection molding filling continues to be completed.

Description

Technical Field

[0001] The invention belongs to the technical field of injection molding anti-leakage cavities, and in particular relates to a wire-bearing injection molding anti-deformation bottom leakage device and process. Background Art

[0002] Injection molding is a manufacturing technology mainly used to produce plastic parts. It involves injecting molten plastic into a mold, which is then cooled and solidified to form the desired shape; wire connector injection molding is a very important process in wire and cable processing, mainly used to produce wire connectors, wiring harness outer sheaths, plugs and other parts;

[0003] In the existing injection molding production, the wire and the connector are injection molded together to form a joint;

[0004] Since the injection molded parts are asymmetrical and of irregular shape, only unilateral injection molding can be used. During injection molding, due to the weight of the injection material and unilateral injection, the injection material will impact the wire, causing the wire to deform during injection molding and the position of the wire after injection molding to deviate. There is a problem of batch bottom exposure, that is, the wire is deformed, deviates from the position inside the injection molded part, and cannot be used normally. Summary of the invention

[0005] The purpose of the present invention is to provide a device for preventing deformation and bottom leakage during injection molding with wires, wherein a wire assembly support device is provided on the injection cavity and the injection mold;

[0006] The wire assembly support device extends into the injection molding cavity and is used to support the wire in the injection molding so that it can resist the pressure impact of the injection molding without deformation;

[0007] Before the injection molding is completely cured, the wire assembly support device withdraws from the injection molding cavity, so that the wire and the injection molding are cured into an integrated structure.

[0008] A technical solution provided by this application also has the following technical features:

[0009] Preferably, in one embodiment of the present application, the wire assembly supporting device includes a driving device and a wire supporting needle, and the driving device is used to drive the wire supporting needle to perform an extending injection molding action and an exit injection molding action.

[0010] Preferably, in one embodiment of the present application, after the wire assembly support device exits the injection molding cavity, the working surface that abuts against the wire is in contact with the surface of the injection molded product.

[0011] Preferably, in one embodiment of the present application, before injection molding or before the injection molding material contacts the wire, the wire assembly support device extends into the injection molding cavity to support the wire.

[0012] Preferably, in one embodiment of the present application, the wire assembly support device exits the injection molding cavity within 40-60% of the injection molding time period.

[0013] Preferably, in one embodiment of the present application, the total injection filling time is 0.52 s, and the ejector retracts at a time point of 0.28 s.

[0014] Preferably, in one embodiment of the present application, a movable pair is formed between the thread supporting needle and the injection mold, and the thread supporting needle is limited to slide only; the driving device contacts the thread supporting needle through curved surfaces or planes at different heights, and moves the contacting thread supporting needle, so that the thread supporting needle performs the action of extending into the injection molding and exiting the injection molding.

[0015] Preferably, in one embodiment of the present application, a moving pair is formed between the working portion of the thread supporting needle extending into the injection cavity and the injection mold, and the limiting working portion and the thread supporting needle can only slide.

[0016] Preferably, in one embodiment of the present application, the thread supporting needle includes a resisting column, a transition head, and a sliding shaft head; the resisting column is connected to the transition head, and sliding shaft heads are arranged at both ends of the transition head;

[0017] The driving device includes a cylinder and a linkage insert; the linkage insert includes an upper limit end and a lower limit end;

[0018] The gap formed by the upper limit end and the lower limit end is used to limit the sliding shaft head of the thread supporting needle;

[0019] The sliding shaft heads on both sides of the transition head are correspondingly provided with an upper limit end and a lower limit end for limiting the sliding shaft heads.

[0020] Preferably, in one embodiment of the present application, the injection molding pressure is 45-75 bar, and the injection speed is 55-85%.

[0021] Preferably, in one embodiment of the present application, a wire assembly support device is arranged opposite to the injection molding port; the portion of the wire assembly support device extending into the injection molding cavity, which is used to support the wire in the injection molding, corresponds to the plastic port, and is used to support the wire to resist the impact and pressure of the injection molding material on the wire, so that the wire maintains the original target position, so that before the injection molding is completed or completely solidified, or after the impact force is weakened, that is, the injection plastic is also filled under the wire, the portion of the wire assembly support device extending into the injection molding cavity exits the injection molding cavity, thereby completing the injection molding and solidification of the product.

[0022] Preferably, in one embodiment of the present application, the portion of the wire assembly support device extending into the injection cavity, after exiting the injection cavity, is in close contact with the product surface of the injection cavity and cooperates to complete the injection filling.

[0023] Combined with a device for preventing deformation and leakage of bottom of injection molding with a wire, a process for preventing deformation and leakage of bottom of injection molding with a wire comprises the following steps:

[0024] Step 1: before injection molding, or before the injection molding material contacts the wire, the contact piece contacts the wire so that the wire resists the impact of the injection molding material without deformation;

[0025] Step 2: before the injection molding is completely solidified, the resistance part is withdrawn to the surface of the injection molding product;

[0026] Step three, continue injection molding and filling.

[0027] Preferably, in one embodiment of the present application, the wire assembly support device exits the injection molding cavity within 40-60% of the injection molding time period.

[0028] Preferably, in one embodiment of the present application, the resistance member completes the withdrawal action within 0.5-0.1s.

[0029] Preferably, in an embodiment of the present application, at least one cylindrical component or at least one ejector component is used to abut against the wire, and the wire is supported by a plurality of abutting surfaces or abutting points.

[0030] Preferably, in one embodiment of the present application, the injection molding includes a plurality of injection molding pressure sections, the initial section uses low-pressure injection molding, and then uses normal-pressure injection molding.

[0031] The beneficial effects of this application are:

[0032] 1. The present application provides a device and process for preventing deformation and leakage of wire injection molding. The device for preventing deformation of wire injection molding adopts an external cylinder auxiliary mechanism, which integrates electricity, gas and mechanics, optimizes the problem of wire batch leakage, and achieves 0.1s level fine-tuning and microsecond level delay;

[0033] 2. This application is arranged opposite to the injection molding port through the ejector mechanism. Its main function is to offset the impact of the injection molding spray on the wire, ensure that the wire does not deform significantly during the injection molding, and retreat at the right time without leaving holes, so as to achieve product integrity;

[0034] 3. The linkage insert in the device converts the lateral movement of the cylinder into the longitudinal movement of the ejector, and the cylinder can be placed horizontally, reducing the height and volume of the mold, thereby reducing the mold cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 This is a state diagram of a wire injection molding deformation prevention bottom leakage device of the present invention extending into the injection molding cavity;

[0036] Figure 2 It is a schematic diagram of the ejection state of a wire assembly support device of a wire injection molding anti-deformation and bottom leakage device of the present invention;

[0037] Figure 3 It is a schematic diagram of the exit state of the injection molding anti-deformation and bottom leakage device with wires of the present invention;

[0038] Figure 4 It is a schematic diagram of the withdrawal state of the wire assembly support device of the wire injection molding anti-deformation and bottom leakage device of the present invention;

[0039] Figure 5 It is a partial enlarged schematic diagram of the connection between the thread support needle and the linkage insert of a thread injection molding anti-deformation and bottom leakage device of the present invention;

[0040] Components in the picture:

[0041] 1. Cylinder

[0042] 2. Linkage inserts

[0043] 3. Rear mold

[0044] 4. Thread support needle

[0045] 41. Column of Resistance

[0046] 42. Transition head

[0047] 43. Sliding shaft head

[0048] 21. Upper limit terminal

[0049] 22. Lower limit end. DETAILED DESCRIPTION

[0050] The specific implementation methods of the present application are further described in detail below in conjunction with the accompanying drawings. These implementation methods are only used to illustrate the present application, and are not intended to limit the present invention.

[0051] In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0052] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0053] Furthermore, in the description of the present invention, unless otherwise specified, “plurality” means two or more.

[0054] like Figure 1-4 , a wire injection molding anti-deformation and bottom leakage device, the injection cavity and the injection mold are provided with a wire assembly support device;

[0055] The wire assembly support device extends into the injection molding cavity and is used to support the wire in the injection molding so that it can resist the pressure impact of the injection molding without deformation;

[0056] Before the injection molding is completely cured, the wire assembly support device withdraws from the injection molding cavity, so that the wire and the injection molding are cured into an integrated structure.

[0057] When the present application is implemented, the present application can precisely coordinate the injection molding action by connecting the cylinder, the solenoid valve, and the injection molding machine in series and linking them with the injection molding motor.

[0058] Specifically, in one embodiment of the present application, Figure 1-4 The wire assembly supporting device includes a driving device and a wire supporting needle 4, and the driving device is used to drive the wire supporting needle 4 to perform the action of extending into the injection molding and the action of exiting the injection molding;

[0059] like Figure 3 , 4 After the wire assembly support device exits the injection molding cavity, the working surface that resists the wire is in contact with the surface of the injection molded product;

[0060] like Figure 1 , 2 Before injection molding or before the injection molding material contacts the wire, the wire assembly support device extends into the injection molding cavity to support the wire.

[0061] Specifically, in one embodiment of the present application, the wire assembly support device exits the injection molding cavity within 40-60% of the injection molding time period; the total injection molding filling time is 0.52s, and the ejector needle retreats at a time point of 0.28s;

[0062] Injection molding pressure is 45-75 bar, and injection speed is 55-85%.

[0063] Specifically, in one embodiment of the present application, Figure 1-5 A moving pair is formed between the thread supporting needle 4 and the injection mold, and the thread supporting needle 4 can only slide; the driving device contacts the thread supporting needle 4 through curved surfaces or planes of different heights, and moves the contacting thread supporting needle 4, so that the thread supporting needle 4 performs the action of extending into the injection molding and the action of exiting the injection molding;

[0064] The working part of the thread supporting needle 4 extending into the injection cavity forms a moving pair with the injection mold, and the limiting working part and the thread supporting needle 4 can only slide;

[0065] The thread support needle 4 includes a contact column 41, a transition head 42, and a sliding shaft head 43; the contact column 41 is connected to the transition head 42, and the sliding shaft heads 43 are arranged at both ends of the transition head 42;

[0066] The driving device includes a cylinder 1 and a linkage insert 2; the linkage insert 2 includes an upper limit end 21 and a lower limit end 22;

[0067] The gap formed by the upper limit end 21 and the lower limit end 22 is used to limit the sliding shaft head 43 of the thread supporting needle 4;

[0068] The sliding shaft heads 43 on both sides of the transition head 42 are correspondingly provided with an upper limit end 21 and a lower limit end 22 for limiting the sliding shaft heads 43 .

[0069] Specifically, in one embodiment of the present application, a process for preventing deformation and bottom leakage by injection molding with a line includes the following steps:

[0070] Step 1: before injection molding, or before the injection molding material contacts the wire, the contact piece contacts the wire so that the wire resists the impact of the injection molding material without deformation;

[0071] Step 2: before the injection molding is completely solidified, the resistance part is withdrawn to the surface of the injection molding product;

[0072] Step three, continue injection molding and filling.

[0073] Specifically, in one embodiment of the present application, during 40-60% of the injection molding period, the wire assembly support device exits the injection molding cavity;

[0074] Within 0.5-0.1s, the resistance part completes the exit action;

[0075] The wire is abutted against the wire by at least one cylindrical component or at least one ejector component, and the wire is supported by a plurality of abutting surfaces or abutting points;

[0076] Injection molding includes multiple injection pressure stages, with low pressure injection at the beginning and then normal pressure injection;

[0077] By implementing this process, combined with the wire injection molding anti-deformation bottom leakage device, deformation of the wire is avoided, and the wire is supported to be in the target position, and then injection molding and fixation are effectively completed.

[0078] Specifically, in one embodiment of the present application:

[0079] 1) When the mold is closed, the thread support needle is in the ejection state, such as Figure 1 , 2 ;

[0080] 2) When starting injection molding, hold the wire to ensure that it is fixed and not deformed by the plastic filling pressure;

[0081] 3) After the plastic part is filled and the wire is initially wrapped, the injection molding machine controls the wire support needle through the solenoid valve and slowly descends to the surface of the product. Figure 3 , 4 ;

[0082] 4) Continue injection molding and filling to complete the product without leaving any holes.

[0083] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principles of the present invention. These improvements and substitutions should also be regarded as the scope of protection of the present invention.

Claims

1. A wire injection molding anti-deformation bottom leakage device, characterized in that: The injection cavity and the injection mold are provided with a wire assembly support device; The wire assembly support device extends into the injection molding cavity to support the wire in the injection molding so that it can resist the pressure impact of the injection molding and not deform; before the injection molding is completely solidified, the wire assembly support device withdraws from the injection molding cavity so that the wire and the injection molding are solidified into an integrated structure.

2. A wire injection molding anti-deformation bottom leakage device as claimed in claim 1, characterized in that: After the wire assembly support device exits the injection molding cavity, the working surface that abuts against the wire adheres to the surface of the injection molded product.

3. The wire injection molding anti-deformation bottom leakage device according to claim 1, characterized in that: Before injection molding or before the injection material contacts the wire, the wire assembly support device extends into the injection molding cavity to support the wire.

4. The wire injection molding anti-deformation bottom leakage device according to claim 1, characterized in that: The wire assembly supports the device and exits the injection molding cavity during 40-60% of the injection molding period.

5. The wire injection molding anti-deformation bottom leakage device according to claim 1, characterized in that: The total injection filling time is 0.52s, and the ejector retracts at 0.28s.

6. The wire injection molding anti-deformation bottom leakage device according to claim 1, characterized in that: The wire assembly support device comprises a driving device and a thread supporting needle (4), wherein the driving device is used to drive the thread supporting needle (4) to perform an insertion injection molding action and an exit injection molding action; a moving pair is formed between the thread supporting needle (4) and the injection mold, and the thread supporting needle (4) is limited to slide only; the driving device contacts the thread supporting needle (4) through curved surfaces or planes at different heights, and moves the contacting thread supporting needle (4), so that the thread supporting needle (4) performs an insertion injection molding action and an exit injection molding action.

7. The wire injection molding anti-deformation bottom leakage device according to claim 1, characterized in that: A moving pair is formed between the working part of the thread supporting needle (4) extending into the injection cavity and the injection mold, and the limiting working part and the thread supporting needle (4) can only slide.

8. The wire injection molding anti-deformation bottom leakage device according to claim 1, characterized in that: The thread supporting needle (4) comprises a resisting column (41), a transition head (42), and a sliding shaft head (43); the resisting column (41) is connected to the transition head (42), and the sliding shaft heads (43) are arranged at both ends of the transition head (42); The driving device comprises a cylinder (1) and a linkage insert (2); the linkage insert (2) comprises an upper limit end (21) and a lower limit end (22); The gap formed by the upper limit end (21) and the lower limit end (22) is used to limit the sliding shaft head (43) of the thread supporting needle (4); The sliding shaft heads (43) on both sides of the transition head (42) are respectively provided with an upper limit end (21) and a lower limit end (22) for limiting the sliding shaft heads (43).

9. A process for preventing deformation and leakage of bottom by injection molding with wire, characterized in that: The steps include: Step 1: before injection molding, or before the injection molding material contacts the wire, the contact member contacts the wire so that the wire resists the impact of the injection molding material without deformation; the contact member contacts the wire through at least one cylindrical component or at least one ejector component; the contact member supports the wire through multiple contact surfaces or contact points; Step 2: before the injection molding is completely solidified, the resistance part is withdrawn to the surface of the injection molding product; Step three, continue injection molding and filling.

10. A process for preventing deformation and bottom leakage by injection molding with a line as claimed in claim 9, characterized in that: During 40-60% of the injection molding period, the conductor assembly supporting device exits the injection molding cavity, and within 0.5-0.1s, the abutment member completes the exiting action.

Images