A special production mold and injection molding equipment for automobile door wiring harness sealing sleeve

Abstract

The present invention provides a special production mold and injection molding equipment for automobile door wiring harness sealing sleeves, including: a lower mold, whose upper surface is provided with a lower cavity matching the outer contour of the wiring harness sealing sleeve, and the peripheral side of the lower mold is provided with an injection molding port interconnected with the lower cavity; an upper mold, whose lower surface is provided with an upper cavity at a position opposite to the lower cavity, and a flexible mold matching the inner contour of the wiring harness sealing sleeve is arranged in the upper cavity, and the flexible mold is sealed with the port of the upper cavity; a pressurizing device interconnected with the upper cavity is arranged on the top of the upper mold for blowing the flexible mold into the lower cavity, and an exhaust port interconnected with the external environment of the lower mold is arranged in the lower cavity. By having the above technical features, the pressurizing device can drive the flexible mold to move in the lower cavity and the upper cavity, so that it can not only serve as the inner contour of the wiring harness sealing sleeve, but also suck the flexible mold into the upper cavity, thereby greatly improving the demoulding efficiency of the finished product.

Description

Technical Field

[0001] The invention generally relates to the field of plastic processing, and in particular to a special production mold and injection molding equipment for a wiring harness sealing sleeve of an automobile door. Background Art

[0002] The wire harness sealing sleeve is a component used in the fields of automobiles, electrical equipment, etc., mainly used to seal and protect the wire harness. It mainly includes a corrugated tube body in the middle and interfaces at both ends of the corrugated tube body. The interfaces can be integrated with the corrugated tube body or detachably connected, so that the wire harness sealing sleeve can realize both bending in the middle and clamping and fixing at both ends.

[0003] The wire harness sealing sleeve is mainly prepared by injection molding through a mold, wherein the mold mainly includes a lower mold and an upper mold, the lower mold is provided with a lower half-groove, the upper mold is provided with an upper half-groove, and a middle mold is also arranged between the lower mold and the upper mold, and a mold core located in the lower half-groove and the upper half-groove is fixed on the middle mold. When the upper mold and the lower mold are closed to each other, the upper half-groove and the lower half-groove are closed to each other, and a gap is left with the mold core. During injection molding, the molten raw material is poured into the gap around the mold core, and the demolding operation is performed after the plastic is solidified.

[0004] Since the mold core is a solid structure and is located inside the finished product, it brings inconvenience to the demoulding work. Therefore, the inventor believes that the conventional special production mold for the wiring harness sealing sleeve has the problem of difficult demoulding. Summary of the invention

[0005] According to the present invention, in view of the problems existing in the above-mentioned prior art, a special production mold for automobile door harness sealing sleeves is provided, including: a lower mold, whose upper surface is provided with a lower cavity matching the outer contour of the harness sealing sleeve, and the peripheral side of the lower mold is provided with an injection port interconnected with the cavity; an upper mold, whose lower surface is provided with an upper cavity at a position opposite to the lower cavity, and a flexible mold matching the inner contour of the harness sealing sleeve is arranged in the upper cavity, and the flexible mold is sealed with the port of the upper cavity; a pressurizing device interconnected with the upper cavity is arranged on the top of the upper mold for blowing the flexible mold into the lower cavity, and an exhaust port interconnected with the external environment of the lower mold is arranged in the lower cavity. By having the above-mentioned technical features, the pressurizing device can drive the flexible mold to move in the lower cavity and the upper cavity, so that it can not only serve as the inner contour of the harness sealing sleeve, but also suck the flexible mold into the upper cavity, thereby greatly improving the demoulding efficiency of the finished product.

[0006] In some embodiments, the pressurizing device includes an air pump and a connecting pipe interconnected with the air pump outlet, and the end of the connecting pipe is interconnected with the upper cavity of the upper mold. Therefore, the air pump can adjust the displacement of the flexible mold by supplying and discharging pressure. When the flexible mold is located in the lower cavity, the outer contour of the flexible mold can serve as the inner wall contour of the wiring harness sealing sleeve, and the air pump can control the pressure value inside the flexible mold, thereby ensuring the strength and hardness of the flexible mold and the consistency of various areas of the finished product after injection molding; when demolding, the air pump can be used to evacuate the air to drive the flexible mold to deform and move into the upper cavity, which greatly improves the convenience of demolding.

[0007] In some embodiments, a first magnet is fixed to the center area of ​​the bottom wall of the lower cavity, and a second magnet for magnetic attraction with the first magnet is fixed to the end of the flexible mold. Thus, the first magnet and the second magnet are magnetically attracted to each other, thereby playing a preliminary positioning role for the flexible mold, avoiding the problem that the gas inside the flexible mold is not filled in place, causing defects in the shape of the inner wall of the final product.

[0008] In some embodiments, the first magnet is annular, and the exhaust port is located in the middle area of ​​the first magnet. Therefore, when the air pump is pumping air, in order to ensure the stability of the air pressure in the lower cavity, the exhaust port is located in the middle of the first magnet, so that the negative pressure directly acts on the magnetic attraction area, thereby improving the stability of the first magnet and the second magnet being separated from each other.

[0009] In some embodiments, the bottom of the lower mold cavity is provided with a positioning mechanism for adjusting the magnetic position of the second magnet, and the positioning mechanism includes a support ring, which is coaxially arranged with the first magnet, and the top surface is provided with a guide section obliquely arranged in the center direction, and the guide section is a part of the outer contour of the wiring harness sealing sleeve, and the support ring is located in the bottom wall of the lower mold cavity and slides with the lower mold in the vertical direction; and also includes a driving component, which drives the support ring to slide with the lower mold in the vertical direction. Therefore, when the first magnet and the second magnet are magnetically attracted to each other, there may be an inaccurate magnetic alignment between the first magnet and the second magnet, which is easy to cause uneven wall thickness of the finished product after injection molding. When the first magnet and the second magnet are magnetically attracted to each other, the driving component drives the support ring to move back and forth up and down, and the guide section of the support ring contacts the end of the flexible mold to guide the end of the flexible mold, thereby improving the accuracy of the magnetic position of the first magnet and the second magnet.

[0010] In some embodiments, the driving assembly includes a driving member located below the lower die, a screw rod coaxially fixed to the output shaft of the driving member, the screw rod being vertically arranged, the screw rod passing through the support ring, and being threadedly connected to the support ring. Thus, the support ring is under the limit and threadedly connected to the screw rod, and the up and down displacement of the support ring is achieved through the rotation of the driving member, and the driving structure is simple, which is convenient for subsequent maintenance and replacement of parts.

[0011] In some embodiments, the support ring includes a detachment ring in the middle and a guide ring located outside the detachment ring, the guide section is opened on the top surface of the guide ring, and the upper surface of the detachment ring is lower than the height of the guide section. Therefore, when the air pump is pumping air, it can drive the driving member to rotate, so that the detachment ring in the middle area of ​​the support ring abuts against the end area of ​​the flexible mold, driving the first magnet and the second magnet to break away from the magnetic attraction state, making it easier to move the flexible mold into the upper cavity.

[0012] In some embodiments, when the flexible mold is located in the lower mold cavity of the lower mold, a heat insulation layer is sprayed on its outer contour. Thus, due to the structural characteristics of the flexible mold itself, the heat insulation layer can increase the service life of the flexible mold.

[0013] An injection molding device includes an injection molding machine body, a special production mold for automobile door harness sealing sleeves fixed on the injection molding machine body, a feeding mechanism interconnected with the injection molding port, and a driving mechanism interconnected with the upper mold for controlling the upper mold displacement. Thus, the automatic operation of injection molding can be realized, and the labor cost can be reduced.

[0014] It should be understood that the contents described in the summary of the invention are not intended to limit the key or important features of the embodiments of the present disclosure, nor are they intended to limit the scope of the present disclosure. Other features of the present disclosure will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A cross-sectional schematic diagram of a special production mold for a wiring harness sealing sleeve for an automobile door provided by an embodiment of the present invention is shown;

[0016] Figure 2 A schematic cross-sectional view of a middle and lower mold of a special production mold for a wiring harness sealing sleeve for a vehicle door provided by an embodiment of the present invention is shown;

[0017] Figure 3 A schematic structural diagram of the bottom area of ​​a lower mold in a special production mold for a wiring harness sealing sleeve for a car door provided by an embodiment of the present invention is shown.

[0018] Explanation of symbols

[0019] 1. Lower mold; 11. Lower cavity; 12. Injection port; 13. Auxiliary air port; 14. Embedded groove; 15. Exhaust port; 2. Upper mold; 21. Upper cavity; 3. Flexible mold; 4. Pressurizing device; 41. Connecting pipe; 51. First magnet; 52. Second magnet; 6. Support ring; 61. Breakaway ring; 62. Guide ring; 621. Guide section; 7. Drive assembly; 71. Drive motor; 72. Screw. DETAILED DESCRIPTION

[0020] Hereinafter, preferred embodiments (or implementation modes) of the present invention will be described in detail with reference to the accompanying drawings.

[0021] Reference below Figure 1-Figure 3 The invention will be used to describe a special production mold and injection molding equipment for a wiring harness sealing sleeve for an automobile door.

[0022] Figure 1 The cross-sectional schematic diagram of a special production mold for a car door wiring harness sealing sleeve provided by an embodiment of the present invention is shown. Figure 1 As shown, the embodiment provides a special mold for a wiring harness sealing sleeve of an automobile door, comprising a lower mold 1 and an upper mold 2.

[0023] The lower mold 1 can be a rectangular plate, and a lower cavity 11 is vertically opened on its upper surface, and the inner wall contour of the lower cavity 11 matches the outer wall contour of the wiring harness sealing sleeve. The upper mold 2, whose matching cover is arranged on the upper surface of the lower mold 1, has an upper cavity 21 vertically opened upward in the area of ​​the lower surface of the upper mold 2 that is opposite to the lower cavity 11 of the lower mold 1. A flexible mold 3 is arranged in the upper cavity 21, and one end of the flexible mold 3 is an opening device, and is sealed and connected to the port of the upper cavity 21, and the other end of the flexible mold 3 is a sealing device, and the overall outer wall contour of the flexible mold 3 matches the inner wall contour of the above-mentioned wiring harness sealing sleeve. The flexible mold 3 is a thin mold body, which is soft and has strong deformation ability. Under the action of pressure, it can enter the lower cavity through the lower mold port. When the flexible mold 3 is deformed and supported in the lower mold cavity 11, a uniform gap is left between the flexible mold 3 and the outer wall and the inner wall of the lower mold cavity 11, and the molten raw material is poured through the injection molding machine, thereby realizing the shaping of the overall structure of the wiring harness sealing sleeve.

[0024] In some embodiments, the lower mold 1 may be provided with a plurality of lower cavities 11, and the upper mold 2 may be provided with upper cavities 21 at the positions opposite to the lower cavities 11 on the lower surface of the upper mold 2. Due to the use of the flexible mold 3, the success and efficiency of the shedding may be greatly improved. Compared with the traditional mold, the horizontally arranged mold not only occupies a large space, but also results in the limited number of slots in the upper mold 2 of the same mold, and the low production efficiency per unit time. Compared with the present embodiment, the lower mold cavity 11 is arranged vertically, which greatly saves the space occupied by the lower mold 1, greatly improves the space utilization rate of the lower mold 1, and further improves the production efficiency of the product per unit time.

[0025] A pressurizing device 4 is also provided above the upper mold 2. The pressurizing device 4 includes an air pump and a connecting pipe 41 interconnected with the output port of the air pump. The connecting pipe 41 is interconnected with the interior of the upper cavity 21 of the upper mold 2. The staff can control the air pressure in the upper cavity 21 to achieve the displacement of the flexible mold 3 in the upper cavity 21 of the upper mold 2 and the lower cavity 11 of the lower mold 1. When the flexible mold is located in the lower cavity, a pressure-maintaining operation can also be performed to ensure the stability of the internal pressure of the flexible mold 3, increase the strength of the flexible mold, ensure the stability of its own shape, and also ensure the stability of the gap width between the flexible mold 3 and the inner wall of the lower cavity 11.

[0026] Figure 2 The cross-sectional view of the lower mold 1 of a special production mold for a wiring harness sealing sleeve for a car door provided by an embodiment of the present invention is shown. Figure 2 As shown, an injection port 12 is provided on the circumferential side of the lower mold 1, and an injection channel is provided inside the lower mold 1, one end of the injection channel is connected to the injection port 12, and the other end of the injection channel is connected to the inner wall of the lower cavity 11. An auxiliary air port 13 is also provided at the port of the lower mold 1, and the other end of the auxiliary air port 13 is connected to the outer wall of the lower mold 1, so as to meet the entry and discharge of air inside the lower cavity 11 during the injection operation.

[0027] Figure 3 The schematic diagram of the bottom area of ​​the lower mold 1 in a special production mold for a car door wiring harness sealing sleeve provided by an embodiment of the present invention is shown. Figure 3 As shown, when the flexible mold 3 is filled into the lower mold cavity 11 of the lower mold 1 under the action of air pressure, due to the structural characteristics of the flexible mold 3 itself, if the air pressure is unstable, or the flexible molds 3 are mutually adhered, it is easy to cause the overall contour of the flexible mold 3 to be incomplete, and the bottom end of the flexible mold 3 does not reach the specified area, resulting in the inner wall shape of the finished product after subsequent injection molding not meeting the requirements. In order to avoid the above situation, a first magnet 51 is embedded in the central area of ​​the lower mold cavity 11 of the lower mold 1, and a second magnet 52 that is magnetically attracted to the first magnet 51 is fixed to the corresponding area of ​​the lower end of the flexible mold 3. Through the mutual magnetic attraction between the first magnet 51 and the second magnet 52, the lower end of the flexible mold 3 is limited, which on the one hand ensures the uniformity of the wall thickness of the final injection molded product, and on the other hand, it also allows each area of ​​the flexible mold 3 to maintain its initial state.

[0028] In order to further improve the accuracy of magnetic alignment between the first magnet 51 and the second magnet 52, an annular groove 14 is vertically opened around the first magnet 51 in the bottom area of ​​the lower cavity 11 of the lower mold 1. The groove 14 is coaxially arranged with the first magnet 51. A support ring 6 that cooperates with the groove 14 is arranged in the groove 14. A driving component 7 that drives the support ring 6 to move vertically up and down is also arranged at the bottom of the support ring 6.

[0029] The driving assembly 7 includes a driving motor 71 fixed to the bottom of the lower mold 1, a screw 72 coaxially fixed to the output shaft of the driving motor 71, the screw 72 is penetrated through the bottom of the lower mold 1, and the upper end of the screw 72 penetrates the support ring 6 and is threadedly connected with the support ring 6. Thus, the rotation of the driving motor 71 drives the screw 72 to rotate, so that the support ring 6 realizes the vertical position under the limit of the embedded groove 14, and with the vertical displacement of the support ring 6, the upper end of the support ring 6 abuts against the lower end of the flexible mold 3, thereby adjusting the magnetic attraction position of the first magnet 51 and the second magnet 52.

[0030] Furthermore, the upper surface of the support ring 6 is provided with a guiding section 621 toward the center. As the support ring 6 is vertically displaced, the guiding section 621 on the upper surface of the support ring 6 contacts the end of the flexible mold 3, thereby guiding the end of the flexible mold 3 toward the center, making the magnetic attraction position of the first magnet 51 and the second magnet 52 more accurate, thereby ensuring the uniformity of the gap between the flexible mold 3 and the inner wall of the lower cavity 11, that is, the uniformity of the thickness of the final injection molded product.

[0031] During the demolding operation, the air pump performs a vacuum operation, thereby extracting the flexible mold 3 from the lower mold cavity 11 and entering the upper mold cavity 21. In order to improve the extraction efficiency, the first magnet 51 is configured as an annular sheet, and an exhaust port 15 is provided in the middle area, and the other end of the exhaust port 15 is interconnected with the external environment of the lower mold 1. During the demolding operation, as the flexible mold 3 moves upward, the air outside the lower mold 1 enters the lower mold cavity 11 through the exhaust port 15 under the action of negative pressure, thereby accelerating the efficiency of the first magnet 51 and the second magnet 52 being separated.

[0032] Furthermore, the support ring 6 includes a detachment ring 61 in the inner annular area, and a guide ring 62 located on the periphery of the detachment ring 61, and the guide section 621 is arranged in the top area of ​​the guide ring 62, so that before the air pump works, the driving motor 71 drives the support ring 6 to move vertically, and makes the upper surface of the detachment ring 61 abut against the lower end of the flexible mold 3, so that the first magnet 51 and the second magnet 52 are detached from each other, and the air pump is started to drive the flexible mold 3 to detach from the interior of the lower cavity 11.

[0033] Furthermore, the guide section 621 of the guide ring 62 in the support ring 6 is also a part of the outer contour of the finished product. When the finished product is demolded, the vertical displacement of the support ring 6 can also drive the finished product to separate from the inner wall of the lower cavity 11, thereby improving the separation efficiency of the finished product and the inner wall of the lower cavity 11.

[0034] Since the injection material is in a molten state, the lower mold 1 is in a high temperature environment for a long time. In order to increase the service life of the flexible mold 3, the outer contour of the flexible mold 3 that contacts the injection material is sprayed with a heat insulation layer.

[0035] Specifically, the heat insulation layer can be the RLHY-12 high-temperature heat insulation coating on the market, which has good adhesion, fire resistance, corrosion resistance, wear resistance, insulation, crack resistance, weather resistance and other characteristics, and can work for a long time in a high temperature environment below 1500 degrees Celsius. It can also be a polybutyl acrylate modified silicone rubber-based heat-resistant heat insulation coating, which avoids the environmental problems caused by practical mail-type solvent diluents, has low cost, and increases the destructive temperature of direct contact to above 275 degrees Celsius.

[0036] During the injection molding operation, the upper mold 2 and the lower mold 1 are closed to each other, and the air pump inflates the upper cavity 21, driving the flexible mold 3 to deform and fill into the lower cavity 11 of the lower mold 1; the air pump stops inflating to maintain pressure, at this time, the drive motor 71 drives the support ring 6 to move vertically, and makes the guide section 621 of the guide ring 62 repeatedly contact the bottom area of ​​the flexible mold 3, driving the fine adjustment of the bottom area of ​​the flexible mold 3, so that the first magnet 51 and the second magnet 52 are more stably attracted to each other. Then the injection molding operation is carried out, and after the finished product is plasticized, the drive motor 71 drives the support ring 6 to move upward, driving the bottom of the flexible mold 3 to separate from the bottom of the lower cavity 11. At this time, the air pump evacuates and drives the flexible mold 3 to enter the upper cavity 21, and opens the upper mold 2 to demold the finished product. This method greatly improves the demolding efficiency.

[0037] In some embodiments, an injection molding device includes an injection molding machine body, a special production mold for the automobile door wiring harness sealing sleeve such as the above-mentioned automobile door wiring harness sealing sleeve fixed on the injection molding machine body, a feeding mechanism interconnected with the injection port 12, and a driving mechanism interconnected with the upper mold 2 for controlling the up and down displacement of the upper mold 2. The above-mentioned feeding mechanism and driving mechanism are conventional structures of existing injection molding equipment and will not be repeated here.

[0038] In the description of this specification, the terms "connection", "installation", "fixation" and the like should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0039] The above are only preferred embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A special production mold for automobile door wiring harness sealing sleeve, characterized in that: include: A lower mold (1) has an upper surface provided with a lower mold cavity (11) matching the outer contour of the wiring harness sealing sleeve, and a peripheral side of the lower mold (1) is provided with an injection port (12) communicating with the lower mold cavity (11); An upper mold (2) has an upper mold cavity (21) formed on its lower surface at a position opposite to the lower mold cavity (11), wherein a flexible mold (3) matching the inner contour of the wiring harness sealing sleeve is disposed in the upper mold cavity (21), wherein one end of the flexible mold (3) is sealed, and the other end is sealed with a port of the upper mold cavity (21); The top of the upper mold (2) is provided with a pressurizing device (4) which is interconnected with the upper mold cavity (21) and is used to blow the flexible mold (3) into the lower mold cavity (11); the lower mold cavity (11) is provided with an exhaust port (15) which is interconnected with the external environment of the lower mold (1); A first magnet (51) is fixed to the center area of ​​the bottom wall of the lower cavity (11), a second magnet (52) for magnetic attraction with the first magnet (51) is fixed to the end of the flexible mold (3), and a positioning mechanism for adjusting the magnetic attraction position of the second magnet (52) is provided at the bottom of the lower cavity (11) of the lower mold (1), and the positioning mechanism includes A support ring (6) is coaxially arranged with the first magnet (51), and a guide cut surface (621) is arranged obliquely toward the center on its top surface. The support ring (6) is located in the bottom wall of the lower cavity (11) and slides along the vertical direction with the lower mold (1); and further includes: The driving assembly (7) drives the support ring (6) to be slidably connected with the lower mold (1) along the vertical direction.

2. The special production mold for automobile door wiring harness sealing sleeve according to claim 1, characterized in that: The pressurizing device (4) comprises An air pump, and a A connecting pipe (41), the end of which is connected to the upper cavity (21) of the upper mold (2).

3. The special production mold for automobile door wiring harness sealing sleeve according to claim 1, characterized in that: The first magnet (51) is annular in shape, and the exhaust port (15) is located in the middle area of ​​the first magnet (51).

4. The special production mold for automobile door wiring harness sealing sleeve according to claim 3, characterized in that: The driving assembly (7) comprises a Drive member, coaxially fixed to the output shaft of the drive member A screw rod (72), wherein the screw rod (72) is arranged vertically, and the screw rod (72) passes through the support ring (6) and is threadedly connected to the support ring (6).

5. The special production mold for automobile door wiring harness sealing sleeve according to claim 4, characterized in that: The support ring (6) comprises a central The release ring (61) and the outer periphery of the support ring (6) The guide ring (62) has a guide cut surface (621) formed on the top surface of the guide ring (62), and an upper surface of the separation ring (61) is lower than the height of the guide cut surface (621).

6. The special production mold for automobile door wiring harness sealing sleeve according to claim 1, characterized in that: When the flexible mold (3) is located in the lower mold cavity (11) of the lower mold (1), a heat insulation layer is sprayed on its outer contour.

7. An injection molding device, characterized in that: It comprises an injection molding machine body, and a special production mold for automobile door wiring harness sealing sleeve as described in any one of claims 1 to 6 fixed on the injection molding machine body, a feeding mechanism interconnected with the injection port (12), and a driving mechanism interconnected with the upper mold (2) for controlling the up and down displacement of the upper mold (2).

Images