Wire harness shell injection molding structure and wire harness injection mold

Abstract

The utility model provides a wire harness shell injection molding structure and a wire harness injection mold.The wire harness shell injection molding structure comprises an upper mold, a lower mold, a fixing plate assembly and an ejection mechanism, the upper mold covers the lower mold to form a cavity and a wire mounting groove which communicate with each other, and the upper mold is provided with an injection molding channel communicating with the cavity; the fixing plate assembly comprises a first fixing plate installed on the upper die and a second fixing plate installed on the lower die. The first fixing plate and the second fixing plate form a terminal fixing groove used for clamping a connecting terminal. The ejection mechanism comprises a first ejector pin, a second ejector pin and an ejection assembly, the ejection assembly is installed in the lower die, the first ejector pin and the second ejector pin are connected to the telescopic end of the ejection assembly, and the second ejector pin movably penetrates through the second ejection channel and the through hole. The connecting terminal is clamped in the terminal fixing groove and is kept stable, so that the shaking of the connecting terminal is reduced; the first ejector pin ejects the injection molding shell, and the second ejector pin ejects the connecting terminal, so that the two ends of the wire harness are simultaneously stressed and smoothly separated from the lower die.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the technical field of automobile wire harness, in particular to a wire harness shell injection molding structure and a wire harness injection molding mold. BACKGROUND

[0002] In the production process of the wire harness, the wire harness needs to be injection molded to form a shell at the connection part of the connecting terminal and the wire.

[0003] When injection molding, the terminal needs to be fixed first. When the terminal is not fixed stably, the terminal and the wire harness body formed by injection molding are prone to deviation, thereby causing defects of the wire harness. When the wire harness with the injection molded shell is ejected, one end of the wire harness is ejected. Due to uneven force on the wire harness, the gate between the wire harness and the injection molding channel is prone to breakage, thereby causing the appearance quality of the wire harness to decrease.

[0004] As disclosed in the comparative file CN202022150707.4, a mold for wire harness connector injection molding machine includes an upper mold plate and a lower mold plate. The upper mold plate is provided with an upper mold core, and the lower mold plate is provided with a lower mold core. The upper mold core and the lower mold core cooperate to form a plurality of forming cavities. The lower mold plate is provided with a flow channel that is in communication with the lower mold core. A positioning column is arranged in the lower mold core near one end of the flow channel. A positioning groove is arranged on the side wall of the positioning column. A wire harness fixing assembly is arranged on the side of the lower mold core away from the positioning column. In this scheme, the terminal of the wire harness and the wire harness are fixed in position under the action of the fixing assembly and the positioning groove. However, when the wire harness is ejected, the wire harness is subjected to uneven force, and the gate between the wire harness and the injection molding channel is prone to breakage, thereby causing the appearance quality of the wire harness to decrease. Utility model content

[0005] The purpose of the present disclosure is to overcome the deficiencies in the prior art and provide a wire harness shell injection molding structure and a wire harness injection molding mold in which the terminal of the wire harness is clamped stably and the wire harness is subjected to even force after injection molding.

[0006] The purpose of the present disclosure is achieved by the following technical solutions:

[0007] A wire harness shell injection molding structure includes an upper mold, a lower mold, a fixing plate assembly, and an ejection mechanism. The upper mold is arranged on the lower mold. A forming cavity and a wire installation groove are formed in the upper mold and the lower mold and are in communication. An injection molding channel is arranged in the upper mold and is in communication with the forming cavity. The fixing plate assembly includes a first fixing plate and a second fixing plate. The first fixing plate is installed on the upper mold, and the second fixing plate is installed on the lower mold. The first fixing plate is provided with a first terminal accommodating groove, and the second fixing plate is provided with a second terminal accommodating groove. The first terminal accommodating groove and the second terminal accommodating groove jointly form a terminal fixing groove for clamping the connecting terminal. The terminal fixing groove is in communication with the forming cavity.

[0008] The ejection mechanism comprises a first ejector pin, a second ejector pin and an ejector assembly, the lower mold is provided with a movable inner cavity, a first ejection channel and a second ejection channel, the ejector assembly is installed in the movable inner cavity, the first ejector pin and the second ejector pin are connected to the telescopic end of the ejector assembly, the first ejector pin is movably arranged in the first ejection channel, the second fixed plate is provided with a through hole communicated with the second terminal accommodating groove, the second ejector pin is movably arranged in the second ejection channel and the through hole, the first ejector pin is used for ejecting the injection shell formed in the cavity, and the second ejector pin is used for ejecting the connecting terminal.

[0009] In one of the embodiments, the upper mold is provided with a first cavity, and the lower mold is provided with a second cavity, the first fixed plate is installed in the first cavity, and the second fixed plate is installed in the second cavity.

[0010] In one of the embodiments, the first cavity and the second cavity are symmetrically arranged along the contact surface of the upper mold and the lower mold.

[0011] In one of the embodiments, the first fixed plate is provided with a fixed hole, the second fixed plate is provided with a fixed protrusion, and the fixed protrusion is movably arranged in the fixed hole.

[0012] In one of the embodiments, the ejector assembly comprises an abutting plate and a telescopic motor, the abutting plate and the telescopic motor are located in the movable inner cavity, the telescopic end of the telescopic motor is connected with the abutting plate, and the first ejector pin and the second ejector pin are respectively connected with the abutting plate.

[0013] In one of the embodiments, the ejector assembly further comprises a spring member, the spring member is sleeved on the telescopic end of the telescopic motor, and the two ends of the spring member are respectively abutted against the abutting plate and the telescopic motor.

[0014] In one of the embodiments, the number of the cavities is multiple, the injection channel is communicated with multiple cavities, the number of the first ejector pin and the second ejector pin is at least multiple, multiple first ejector pins are connected to the telescopic end of the ejector assembly, each first ejector pin is used for ejecting a corresponding injection shell, and multiple second ejector pins are connected to the telescopic end of the ejector assembly, each second ejector pin is used for ejecting a corresponding connecting terminal.

[0015] In one of the embodiments, the injection channel comprises a feeding channel and an injection channel, one end of multiple injection channels is communicated with the injection channel, and each injection channel is communicated with a corresponding cavity.

[0016] In one of the embodiments, the feeding channel is located above the cavity.

[0017] A wire harness injection mold comprises the wire harness shell injection structure in any of the above embodiments.

[0018] Compared with the prior art, the present disclosure has at least the following advantages:

[0019] The wire harness shell injection structure and the wire harness injection mold have the following advantages: the first fixed plate and the second fixed plate clamp the connecting terminal, so that the connecting terminal is clamped in the terminal fixed groove and remains stable, reducing the problem of shaking of the connecting terminal during injection molding, so that the connection position between the connecting terminal and the wire harness is accurate, reducing the defective rate of the wire harness injection molding; the first ejector pin ejects the injection shell, and the second ejector pin ejects the connecting terminal, so that both ends of the wire harness are simultaneously stressed and smoothly separated from the lower mold, so that the runner formed by the injection channel and the gate of the wire harness are not easy to break, thereby reducing the gate defect of the wire harness and improving the injection quality of the wire harness. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the following will briefly introduce the drawings needed to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present disclosure, and therefore should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can also be obtained without creative labor.

[0021] Figure 1 The structure diagram of the wire harness shell injection structure of an embodiment is shown in the figure.

[0022] Figure 2 The structure diagram of the upper mold of the wire harness shell injection structure is shown in the figure. Figure 1 The structure diagram of the lower mold of the wire harness shell injection structure is shown in the figure.

[0023] Figure 3 The structure diagram of the lower mold of the wire harness shell injection structure is shown in the figure. Figure 1 The structure diagram of the lower mold of the wire harness shell injection structure is shown in the figure. DETAILED DESCRIPTION

[0024] In order to facilitate understanding of the present disclosure, the present disclosure will be described more fully below with reference to the related drawings. The preferred embodiments of the present disclosure are shown in the drawings. However, the present disclosure can be implemented in many different forms, and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present disclosure more thorough and comprehensive.

[0025] It should be noted that when an element is referred to as being "on" another element, it can be directly on the other element or intervening elements can also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements can also be present. As used herein the terms "vertical", "horizontal", "left", "right" and similar terms are used for explanation only and are not intended to limit the scope of the disclosure.

[0026] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs. The terminology used in the description of the disclosure herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the disclosure. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0027] For better understanding of the technical solutions and beneficial effects of the disclosure, the disclosure is further described in detail below in combination with specific embodiments:

[0028] As shown in Figures 1 to 3 Fig. 1 is a line harness shell injection molding structure 10 according to an embodiment of the disclosure, which comprises an upper mold 100, a lower mold 200, a fixed plate assembly 300 and an ejection mechanism 400. The upper mold 100 is arranged on the lower mold 200. The upper mold 100 and the lower mold 200 are connected to form a cavity 101 and a connecting line mounting groove 102 in communication. The connecting line mounting groove 102 is used to place the connecting wire connected with the connecting terminal. The upper mold 100 is provided with an injection channel 103, and the injection channel 103 is communicated with the cavity 101.

[0029] Further, the fixed plate assembly 300 comprises a first fixed plate 310 and a second fixed plate 320, the first fixed plate 310 is installed on the upper mold 100, the second fixed plate 320 is installed on the lower mold 200, the first fixed plate 310 is provided with a first terminal receiving groove 3101, the second fixed plate 320 is provided with a second terminal receiving groove 3201, the first terminal receiving groove 3101 and the second terminal receiving groove 3201 jointly form a terminal fixed groove 301, the terminal fixed groove 301 is used for clamping a connecting terminal, and the terminal fixed groove 301 is communicated with the cavity 101. The ejection mechanism 400 comprises a first ejector pin 410, a second ejector pin 420 and an ejector assembly 430, the lower mold 200 is provided with a movable inner cavity 201, a first ejection channel 202 and a second ejection channel 203, the ejector assembly 430 is installed on the movable inner cavity 201, the first ejector pin 410 and the second ejector pin 420 are connected to the telescopic end of the ejector assembly 430, the first ejector pin 410 is movably arranged in the first ejection channel 202, the first ejector pin 410 is used for ejecting an injection housing formed in the cavity 101, the second ejector pin 420 is used for ejecting the connecting terminal, the second fixed plate 320 is provided with a through hole 3202 which is communicated with the second terminal receiving groove 3201, and the second ejector pin 420 is movably arranged in the second ejection channel 203 and the through hole 3202.

[0030] In the embodiment, the connecting terminal is first placed in the second terminal receiving groove 3201, the connecting terminal is connected with the wire in the cavity 101, and the wire is arranged in the connecting wire installation groove 102, then the upper mold 100 is arranged on the lower mold 200, the first terminal receiving groove 3101 and the second terminal receiving groove 3201 are closed to clamp the connecting terminal, so that the connecting terminal is fixed between the upper mold 100 and the lower mold 200; when injection molding, the molten plastic enters the cavity 101 from the injection channel 103 to form an injection housing, the injection housing covers part of the wire and is integrated with the connecting terminal; when the wire harness is ejected after the upper mold 100 is opened, the first ejector pin 410 and the second ejector pin 420 abut against the injection housing and the connecting terminal of the wire harness respectively, so that the wire harness is uniformly stressed and smoothly separated from the lower mold 200.

[0031] The wire harness shell injection structure 10 described above clamps the connecting terminal through the first fixed plate 310 and the second fixed plate 320, so that the connecting terminal is clamped in the terminal fixed groove 301 and remains stable, reducing the problem of shaking of the connecting terminal during the injection process, so that the connection position between the connecting terminal and the wire harness is accurate, and the defective rate of the wire harness injection is reduced; the first ejector pin 410 ejects the injection shell, and the second ejector pin 420 ejects the connecting terminal, so that both ends of the wire harness are simultaneously stressed and smoothly separated from the lower mold 200, so that the runner formed by the injection channel 103 is not easy to break the gate of the wire harness, thereby reducing the gate defect of the wire harness and improving the injection quality of the wire harness.

[0032] As shown in Figure 1 and Figure 3 In one embodiment, the upper mold 100 is provided with a first cavity 104, and the lower mold 200 is provided with a second cavity 204. The first fixed plate 310 is installed in the first cavity 104, and the second fixed plate 320 is installed in the second cavity 204. In this embodiment, the first fixed plate 310 and the second fixed plate 320 are installed through the first cavity 104 and the second cavity 204, so that the first fixed plate 310 with different first terminal accommodating grooves 3101 and the second fixed plate 320 with corresponding second terminal accommodating grooves 3201 can be replaced, thereby adapting to injection molding of more different specifications of connecting terminals.

[0033] As shown in Figure 1 In one embodiment, the first cavity 104 and the second cavity 204 are symmetrically arranged. In this embodiment, the positions of the first fixed plate 310 and the second fixed plate 320 are corresponding, thereby improving the accuracy of the first fixed plate 310 clamping the second fixed plate 320, and further improving the injection quality of the wire harness obtained by the injection shell.

[0034] As shown in Figure 2 In one embodiment, the first fixed plate 310 is provided with a fixed hole 3102, and the second fixed plate 320 is provided with a fixed protrusion 321. The fixed protrusion 321 is adapted to be arranged in the fixed hole 3102. In this embodiment, the fixed protrusion 321 is arranged in the fixed hole 3102, so that the fitting position of the first fixed plate 310 and the second fixed plate 320 is accurate, thereby fixing the position of the terminal fixed groove 301 clamping the connecting terminal, and further improving the consistency of the wire harness obtained by the injection shell.

[0035] As shown in Figure 1As shown in one of the embodiments, the ejecting assembly 430 includes an abutting plate 431 and a telescopic motor 432, both of which are located in the movable cavity 201, and the telescopic end of the telescopic motor 432 is connected with the abutting plate 431, and the first ejector pin 410 and the second ejector pin 420 are respectively connected with the abutting plate 431. In this embodiment, the telescopic motor 432 can control the abutting plate 431 to ascend and descend, and the abutting plate 431 drives the first ejector pin 410 to move in the first ejecting channel 202 and drives the second ejector pin 420 to move synchronously in the second ejecting channel 203, so as to keep the synchronous movement of the first ejector pin 410 and the second ejector pin 420, and the telescopic motor 432 can accurately control the synchronous ejection of the first ejector pin 410 and the second ejector pin 420.

[0036] As shown in one of the embodiments, the telescopic motor 432 is connected with the abutting plate 431 through the spring member 433. Figure 1 As shown in one of the embodiments, the telescopic motor 432 is connected with the abutting plate 431 through the spring member 433.

[0037] As shown in one of the embodiments, the telescopic motor 432 is connected with the abutting plate 431 through the spring member 433. Figure 2 As shown in one of the embodiments, the number of the cavities 101 is multiple, the injection channel 103 is communicated with the multiple cavities 101, the number of the first ejector pins 410 and the second ejector pins 420 is at least multiple, the multiple first ejector pins 410 are all connected with the telescopic end of the ejecting assembly 430, each of the first ejector pins 410 is used for ejecting a corresponding injection shell, and the multiple second ejector pins 420 are all connected with the telescopic end of the ejecting assembly 430, each of the second ejector pins 420 is used for ejecting a corresponding connecting terminal. In this embodiment, each of the cavities 101 is communicated through the injection channel 103, so that the injection conditions in each of the cavities 101 are kept consistent, the multiple first ejector pins 410 are connected with the telescopic end of the ejecting assembly 430, and the multiple second ejector pins 420 are connected with the telescopic end of the ejecting assembly 430, so that the ejecting assembly 430 can eject multiple injection molded wire harnesses at the same time, thereby keeping the quality of the injection molded wire harnesses consistent, reducing the problem of the gate breakage between the multiple cavities 101, and improving the production efficiency when multiple cavities 101 are used to injection mold multiple wire harnesses, thereby reducing the production cost of the injection molded wire harnesses.

[0038] As shown in one of the embodiments, the telescopic motor 432 is connected with the abutting plate 431 through the spring member 433. Figure 2As shown, in one of the embodiments, the injection channel 103 comprises a feeding channel 103a and a liquid injection channel 103b, one end of the plurality of liquid injection channels 103b is communicated with the liquid injection channel 103b, and each of the liquid injection channels 103b is communicated with the corresponding cavity 101. In this embodiment, by precisely controlling the flow of plastic glue in different parts of the injection channel 103, the feeding channel 103a introduces the molten glue, buffers and distributes the molten glue into different liquid injection channels 103b through the feeding channel 103a, and then uniformly and stably injects into the corresponding cavity 101 through the liquid injection channel 103b, thereby avoiding the problems of molten glue accumulation or uneven flow.

[0039] As shown, Figure 1 As shown, in one of the embodiments, the feeding channel 103a is located above the cavity 101. In this embodiment, when the molten glue is injected into the cavity 101 from above, due to the action of gravity, the molten glue smoothly flows into the cavity 101 through the feeding channel 103a, the liquid injection channel 103b and the liquid injection channel 103b, and the molten glue bubbles and entrained air are reduced, thereby improving the quality of the injection shell.

[0040] The application also provides a wire harness injection mold comprising the wire harness shell injection structure 10 in any of the above embodiments. In this embodiment, by fixing the connection terminal through the wire harness shell injection structure 10, the defect rate of the wire harness injection is reduced, the first ejector pin 410 ejects the injection shell, and the second ejector pin 420 ejects the connection terminal, so that the wire harness is more smoothly separated from the lower mold 200, and the generation of the wire harness gate defect is reduced.

[0041] Compared with the prior art, the present disclosure has at least the following advantages:

[0042] The wire harness shell injection structure 10 and the wire harness injection mold described above, by clamping the connection terminal through the first fixed plate 310 and the second fixed plate 320, the connection terminal is clamped in the terminal fixing groove 301 and remains stable, reducing the problem of shaking of the connection terminal during the injection process, thereby making the connection position between the connection terminal and the wire harness accurate, reducing the defect rate of the wire harness injection; by ejecting the injection shell through the first ejector pin 410 and ejecting the connection terminal through the second ejector pin 420, the two ends of the wire harness are simultaneously stressed and smoothly separated from the lower mold 200, thereby making the gate formed by the injection channel 103 and the gate of the wire harness not easy to break, thereby reducing the gate defect of the wire harness and improving the injection quality of the wire harness.

[0043] The above-described embodiments are merely illustrative of several embodiments of the present disclosure, which are described in a more specific and detailed manner, but should not be construed as limiting the scope of the patent disclosure. It should be noted that for those skilled in the art, several modifications and improvements can be made without departing from the concept of the present disclosure, and these all belong to the protection scope of the present disclosure. Therefore, the protection scope of the patent of the present disclosure should be subject to the appended claims.

Claims

1. A wire harness housing injection molding structure, comprising an upper mold, a lower mold, a fixed plate assembly and an ejection mechanism, the upper mold covers the lower mold, a cavity and a wire installation groove are formed between the upper mold and the lower mold and are connected, the upper mold is provided with an injection channel, and the injection channel is connected to the cavity, characterized in that, the fixed plate assembly comprises a first fixed plate and a second fixed plate, the first fixed plate is installed on the upper mold, the second fixed plate is installed on the lower mold, the first fixed plate is provided with a first terminal receiving groove, the second fixed plate is provided with a second terminal receiving groove, the first terminal receiving groove and the second terminal receiving groove jointly form a terminal fixed groove for clamping a connecting terminal, and the terminal fixed groove is connected to the cavity; the ejection mechanism comprises a first ejector pin, a second ejector pin and an ejection assembly, the lower mold is provided with a movable inner cavity, a first ejection channel and a second ejection channel, the ejection assembly is installed in the movable inner cavity, the first ejector pin and the second ejector pin are connected to the telescopic end of the ejection assembly, the first ejector pin is movably arranged in the first ejection channel, the second fixed plate is provided with a through hole connected to the second terminal receiving groove, the second ejector pin is movably arranged in the second ejection channel and the through hole, and the first ejector pin is used to eject the injection housing formed in the cavity, and the second ejector pin is used to eject the connecting terminal.

2. The wire harness housing injection molded structure of claim 1, wherein, the upper mold is provided with a first cavity, the lower mold is provided with a second cavity, the first fixed plate is installed in the first cavity, and the second fixed plate is installed in the second cavity.

3. The wire harness housing injection molded structure of claim 2, wherein, the first cavity and the second cavity are symmetrically arranged along the contact surface of the upper mold and the lower mold.

4. The wire harness housing injection molded structure of claim 1, wherein, the first fixed plate is provided with a fixed hole, the second fixed plate is provided with a fixed protrusion, and the fixed protrusion is adapted to be arranged in the fixed hole.

5. The wire harness housing injection molded structure of claim 1, wherein, the ejection assembly comprises an abutting plate and a telescopic motor, the abutting plate and the telescopic motor are located in the movable inner cavity, the telescopic end of the telescopic motor is connected to the abutting plate, and the first ejector pin and the second ejector pin are respectively connected to the abutting plate.

6. The wire harness housing injection molded structure of claim 5, wherein, the ejection assembly further comprises a spring member, the spring member is sleeved on the telescopic end of the telescopic motor, and the two ends of the spring member are respectively abutted against the abutting plate and the telescopic motor.

7. The wire harness housing injection molded structure of claim 1, wherein, the number of the cavities is multiple, the injection channel is connected to the multiple cavities, the number of the first ejector pin and the second ejector pin is at least multiple, the multiple first ejector pins are connected to the telescopic end of the ejection assembly, each first ejector pin is used to eject a corresponding injection housing, and the multiple second ejector pins are connected to the telescopic end of the ejection assembly, each second ejector pin is used to eject a corresponding connecting terminal.

8. The wire harness housing injection molded structure of claim 7, wherein, the injection channel comprises a feeding channel and an injection channel, one end of the multiple injection channels is connected to the injection channel, and each injection channel is connected to a corresponding cavity.

9. The wire harness housing injection molded structure of claim 8, wherein, the feeding channel is located above the cavity.

10. A wiring harness injection mold characterized by, the wire harness housing injection molding structure of any one of claims 1-9.

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