A sealing device and a sealing mold for an injection molding machine

Abstract

The present application relates to the technical field of wire harness encapsulation, and discloses a wire harness encapsulation device and encapsulation mold for an injection molding machine. The wire harness encapsulation device for the injection molding machine comprises an upper mold pressing block, a lower mold pressing block and two flexible pressing blocks. When the upper mold pressing block is crimped to the lower mold pressing block, a receiving hole is formed between the opposite side walls of the upper mold pressing block and the lower mold pressing block, and the receiving hole is used for accommodating double-layer wire harnesses. The opposite side walls of the upper mold pressing block and the lower mold pressing block are respectively provided with mounting grooves, and the two mounting grooves are respectively provided with flexible pressing blocks. The flexible pressing blocks protrude from the mounting groove. The flexible pressing blocks in the two mounting grooves are used for sealing and crimping the double-layer wire harnesses. The present application realizes encapsulation of the double-layer wire harnesses, and no overflow phenomenon occurs in the subsequent injection molding process. After demolding, the flexible pressing blocks can be separated from the gap. The flexible pressing blocks and the double-layer wire harnesses are in flexible contact, and no damage is caused to the wire. The flexible pressing blocks do not need to be processed to form a wire groove, and the flexible pressing blocks have low processing cost and short processing cycle.

Description

Technical Field

[0001] This invention relates to the field of wire harness sealing technology, and more particularly to a sealing device and sealing mold for injection molding machines. Background Technology

[0002] Currently, injection molding machines are commonly used to seal wires. For double-row products, two layers of wires are stacked, with each layer consisting of multiple wires arranged side by side. The wires are elliptical in shape. Because the two layers of wires are arranged in parallel, a cross-shaped gap is formed between the wires. If this gap is not sealed during the injection molding process, there is a risk of glue overflow.

[0003] In existing technologies, when sealing double-row cables, rigid pressure blocks are installed at the top and bottom of the cable. These blocks are machined with contoured grooves to conform to the shape of the cables. The two rigid pressure blocks press against both sides of the cable, and the contoured grooves fit the cables to achieve sealing. However, existing technologies have the following problems: 1. The rigid pressure blocks cannot fill the cross-shaped gaps between the cables, thus failing to achieve complete sealing. Therefore, acetate tape needs to be wrapped around the ends of the cables to reduce the risk of adhesive overflow. 2. The contact between the rigid pressure blocks and the cables is rigid, which can damage the cables. Although wrapping with acetate tape reduces the risk of damage, the cables are still under rigid compression. 3. The rigid grooves increase manufacturing costs and processing time. A new groove must be created for each product, lacking versatility.

[0004] Therefore, there is an urgent need for a sealing device and sealing mold for injection molding machines to solve the aforementioned problems. Summary of the Invention

[0005] Based on the above, the purpose of this invention is to provide a sealing device and sealing mold for injection molding machines, which realizes the sealing of double-layer ribbon cables without damaging the cables, and has low processing cost and short processing cycle.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] On the one hand, a sealing device for an injection molding machine is provided, including an upper mold pressing block, a lower mold pressing block and two flexible pressing blocks. When the upper mold pressing block is pressed against the lower mold pressing block, a receiving hole is formed between the opposite side walls of the upper mold pressing block and the lower mold pressing block. The receiving hole is used to accommodate double-layer ribbon cables.

[0008] The upper mold pressing block and the lower mold pressing block are respectively provided with mounting grooves on their opposite side walls. The flexible pressing blocks are respectively installed in the two mounting grooves. The flexible pressing blocks protrude from the groove opening of the mounting groove and are used to seal and press against the double-layer ribbon cable.

[0009] As a preferred technical solution for a sealing device for an injection molding machine, the protrusion distance of the flexible pressure block relative to the groove opening of the mounting groove is A, the double-layer wiring is achieved by superimposing two layers of wiring, each layer of wiring includes multiple wires arranged side by side, the thickness of the wires is B, and the ratio of A to B is in the range of 0.9-1.

[0010] As a preferred technical solution for a sealing device used in injection molding machines, the flexible pressure block has a high temperature resistance of not less than 250°C.

[0011] As a preferred technical solution for a sealing device for an injection molding machine, the flexible pressure block has a Shore hardness of 40HA-70HA.

[0012] As a preferred technical solution for a sealing device used in injection molding machines, the flexible pressure block is made of high-temperature silicone.

[0013] As a preferred technical solution for a sealing device for an injection molding machine, the side of the flexible pressure block used to press the double-layer cable is flat.

[0014] As a preferred technical solution for a sealing device for an injection molding machine, the flexible pressure block has a dimension C along the length direction of the double-layer ribbon cable. The double-layer ribbon cable is formed by two layers of ribbon cables stacked together. Each layer of the ribbon cable includes multiple wires arranged side by side. The thickness of the wires is B, where B ranges from 0.9mm to 1.5mm, and the ratio of C to B ranges from 6 to 8.

[0015] As a preferred technical solution for a sealing device for an injection molding machine, one of the upper mold block and the lower mold block is provided with a guide groove, and the other is provided with a guide protrusion, the guide protrusion being able to slide along the guide groove.

[0016] As a preferred technical solution for a sealing device used in an injection molding machine, the flexible pressure block is interference-fitted into the mounting groove; or

[0017] The flexible pressure block is bonded to the mounting groove; or

[0018] The flexible pressure block is connected to the mounting groove by fasteners.

[0019] On the other hand, a sealing mold is provided, including the sealing device for an injection molding machine as described in any of the above embodiments. The sealing mold seals a double-layer ribbon cable through the sealing device for the injection molding machine. The double-layer ribbon cable has a forming position on one side of the sealing device for the injection molding machine, and the sealing mold performs injection molding at the forming position.

[0020] The beneficial effects of this invention are as follows:

[0021] This invention provides a sealing device and sealing mold for an injection molding machine. During processing, a double-layer ribbon cable is placed between an upper mold block and a lower mold block. When the injection molding machine drives the upper mold block to press against the lower mold block, the double-layer ribbon cable is located within the receiving hole. Simultaneously, the upper and lower sides of the double-layer ribbon cable are pressed by flexible blocks. First, when the double-layer ribbon cable is subjected to pressing force, the wires of the upper and lower layers are squeezed from their facing position to a staggered position, forming an outward-facing gap between the wires. Due to the flexibility of the flexible blocks, and because the flexible blocks protrude from the groove of the mounting slot, the two flexible blocks undergo elastic deformation to fill the gap between the wires on both sides of the double-layer ribbon cable, thus sealing the double-layer ribbon cable. No overflow occurs during subsequent injection molding, and after demolding, the flexible blocks can detach from the gap. Second, the flexible contact between the flexible blocks and the double-layer ribbon cable is flexible, preventing damage to the wires. Furthermore, the flexible pressure block does not require the processing of contoured grooves, resulting in low processing costs, short processing cycles, and high versatility. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments of the present invention will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the content of the embodiments of the present invention and these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the sealing device for an injection molding machine used in a specific embodiment of the present invention for sealing double-layer ribbon cables;

[0024] Figure 2 This is an exploded view of the sealing device for an injection molding machine provided in a specific embodiment of the present invention;

[0025] Figure 3 This is one of the structural schematic diagrams of the double-layer cabling provided in a specific embodiment of the present invention;

[0026] Figure 4 This is the second schematic diagram of the double-layer cabling structure provided in a specific embodiment of the present invention;

[0027] Figure 5This is a schematic diagram of the sealing device for an injection molding machine provided in a specific embodiment of the present invention.

[0028] The markings in the image are as follows:

[0029] 10. Double-layer ribbon cable; 101. Cable material; 102. Gap;

[0030] 1. Upper mold pressing block; 11. Guide protrusion; 2. Lower mold pressing block; 21. Guide groove; 22. Mounting groove; 3. Flexible pressing block. Detailed Implementation

[0031] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, and not all of the structures.

[0032] In the description of this invention, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0033] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0034] In the description of this embodiment, the terms "upper," "lower," "left," and "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention. In addition, the terms "first" and "second" are used only for distinction in description and have no special meaning.

[0035] like Figures 1-2As shown, this embodiment provides a sealing mold, which includes a sealing device for an injection molding machine. The sealing mold seals the double-layer ribbon cable 10 using the sealing device. The double-layer ribbon cable 10 has a molding position on one side of the sealing device, and the sealing mold performs injection molding at the molding position. The sealing device for the injection molding machine includes an upper mold pressure block 1, a lower mold pressure block 2, and two flexible pressure blocks 3.

[0036] Specifically, when the upper mold pressing block 1 presses against the lower mold pressing block 2, a receiving hole is formed between the opposite side walls of the upper mold pressing block 1 and the lower mold pressing block 2. The receiving hole is used to accommodate the double-layer ribbon cable 10. The opposite side walls of the upper mold pressing block 1 and the lower mold pressing block 2 are respectively provided with mounting grooves 22. Flexible pressing blocks 3 are installed in the two mounting grooves 22 respectively. The flexible pressing blocks 3 protrude from the groove opening of the mounting groove 22. The flexible pressing blocks 3 in the two mounting grooves 22 are used to seal and press against the double-layer ribbon cable 10.

[0037] During processing, the double-layer cable 10 is placed between the upper mold pressure block 1 and the lower mold pressure block 2. When the injection molding machine drives the upper mold pressure block 1 to press against the lower mold pressure block 2, the double-layer cable 10 is located in the receiving hole. At the same time, the upper and lower sides of the double-layer cable 10 are pressed by flexible pressure blocks 3 respectively. First, when the double-layer cable 10 is subjected to pressing force, the wires 101 of the upper and lower layers of the cable are... Figure 3 The shown face-to-face setting is squeezed to Figure 4 As shown in the misaligned arrangement, gaps 102 with openings facing outwards are formed between wires 101. Because the flexible pressure blocks 3 are flexible and protrude from the opening of the mounting groove 22, the two flexible pressure blocks 3 undergo elastic deformation to fill the gaps 102 between the wires 101 on both sides of the double-layer ribbon cable 10, thus sealing the double-layer ribbon cable 10. No glue overflow will occur during subsequent injection molding, and the flexible pressure blocks 3 can detach from the gaps 102 after demolding. Furthermore, the flexible pressure blocks 3 have flexible contact with the double-layer ribbon cable 10, preventing damage to the wires 101. Moreover, the flexible pressure blocks 3 do not require the processing of contoured grooves, resulting in low processing costs, short processing cycles, and high versatility.

[0038] Furthermore, such as Figure 4 and Figure 5 As shown, the protrusion distance of the flexible pressure block 3 relative to the groove opening of the mounting groove 22 is A. The double-layer ribbon cable 10 is formed by two layers of ribbon cables stacked together. Each layer of ribbon cable includes multiple wires 101 arranged side by side. The thickness of the wires 101 is B. The ratio of A to B is in the range of 0.9-1, so as to ensure that when the flexible pressure block 3 is pressed onto the double-layer ribbon cable 10, the flexible pressure block 3 can completely fill the gap 102 between the wires 101 and prevent the phenomenon of glue overflow during injection molding.

[0039] Since the flexible pressure block 3 is used in the injection molding machine, the high temperature resistance of the flexible pressure block 3 is not less than 250℃, so as to prevent the double-layer wiring 10 from melting in the subsequent injection molding process.

[0040] To prevent the flexible pressure block 3 from being too hard and thus failing to completely fill the gap, and to prevent the flexible pressure block 3 from being too soft and causing unevenness and glue overflow on the sealing end face, in this embodiment, the Shore hardness of the flexible pressure block 3 is 40HA-70HA.

[0041] Preferably, the flexible pressure block 3 is made of high-temperature silicone, which has good high-temperature resistance and fatigue resistance, and can return to its original shape after the sealing pressure is removed. For example, disc-shaped silicone or high-temperature mold silicone can be used. In this embodiment, the flexible pressure block 3 is made of disc-shaped silicone. In other embodiments, the flexible pressure block 3 can also be made of methyl vinyl silicone rubber.

[0042] More preferably, the side of the flexible pressure block 3 used to press the double-layer cable 10 is flat, which facilitates the processing of the flexible pressure block 3.

[0043] During the injection molding process, the sidewall of the flexible pressure block 3 will generate a certain injection pressure. To prevent the portion of the flexible pressure block 3 filled into the gap 102 from being impacted by the injection pressure and causing overflow, such as... Figures 2-4 As shown, the flexible pressure block 3 has a dimension C along the length of the double-layer ribbon cable 10, and the thickness of the wire 101 of the double-layer ribbon cable 10 is B, where B ranges from 0.9mm to 1.5mm, and the ratio of C to B ranges from 6 to 8, that is, dimension C is six to eight times the dimension B. In this embodiment, the dimension C of the flexible pressure block 3 along the length of the double-layer ribbon cable 10 ranges from 5.4mm to 12mm, so that the flexible pressure block 3 has sufficient thickness to withstand the impact during the injection molding process, thereby preventing glue overflow from the side of the double-layer ribbon cable 10 away from the injection molding.

[0044] Preferably, such as Figure 1 and Figure 2 As shown, one of the upper die pressing block 1 and the lower die pressing block 2 is provided with a guide groove 21, and the other is provided with a guide protrusion 11. The guide protrusion 11 can slide along the guide groove 21. In this embodiment, the lower die pressing block 2 is provided with a guide groove 21, and the mounting groove 22 of the lower die pressing block 2 is located at the bottom of the guide groove 21. The upper die pressing block 1 is provided with a guide protrusion 11, and the mounting groove 22 of the upper die pressing block 1 is located on the end face of the guide protrusion 11.

[0045] Furthermore, the flexible pressure block 3 is interference-fitted into the mounting groove 22; or the flexible pressure block 3 is bonded into the mounting groove 22; or the flexible pressure block 3 is connected to the mounting groove 22 by fasteners. In this embodiment, the flexible pressure block 3 is interference-fitted into the mounting groove 22. When the upper mold pressure block 1 presses against the lower mold pressure block 2, the flexible pressure block 3 is simultaneously subjected to the reaction force of the double-layer ribbon cable 10, so that the flexible pressure block 3 can be completely installed in the mounting groove 22, improving the installation accuracy.

[0046] Note that the above description is merely a preferred embodiment of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and may include many other equivalent embodiments without departing from the concept of the present invention, the scope of which is determined by the scope of the appended claims.

Claims

1. A sealing device for an injection molding machine, characterized in that, It includes an upper die pressing block (1), a lower die pressing block (2) and two flexible pressing blocks (3). When the upper die pressing block (1) is pressed against the lower die pressing block (2), a receiving hole is formed between the opposite side walls of the upper die pressing block (1) and the lower die pressing block (2). The receiving hole is used to accommodate the double-layer ribbon cable (10). The upper mold pressing block (1) and the lower mold pressing block (2) are respectively provided with mounting grooves (22) on their opposite side walls. The flexible pressing blocks (3) are respectively installed in the two mounting grooves (22). The flexible pressing blocks (3) protrude from the groove opening of the mounting groove (22). The flexible pressing blocks (3) in the two mounting grooves (22) are used to seal and press against the double-layer ribbon cable (10). The Shore hardness of the flexible block (3) is 40HA-70HA.

2. The sealing device for an injection molding machine according to claim 1, characterized in that, The protrusion distance of the flexible pressure block (3) relative to the groove of the mounting groove (22) is A. The double-layer ribbon cable (10) is formed by superimposing two layers of ribbon cables. Each layer of the ribbon cable includes multiple wires (101) arranged side by side. The thickness of the wires (101) is B. The ratio of A to B is in the range of 0.9-1.

3. The sealing device for an injection molding machine according to claim 1, characterized in that, The flexible pressure block (3) has a high temperature resistance of not less than 250℃.

4. The sealing device for an injection molding machine according to claim 1, characterized in that, The flexible pressure block (3) is made of high-temperature silicone.

5. The sealing device for an injection molding machine according to claim 1, characterized in that, The side of the flexible pressure block (3) used to press the double-layer cable (10) is flat.

6. The sealing device for an injection molding machine according to claim 1, characterized in that, The flexible pressure block (3) has a dimension C along the length of the double-layer ribbon cable (10). The double-layer ribbon cable (10) is formed by two layers of ribbon cables stacked together. Each layer of the ribbon cable includes multiple wires (101) arranged side by side. The thickness of the wires (101) is B, where B ranges from 0.9mm to 1.5mm, and the ratio of C to B ranges from 6 to 8.

7. The sealing device for an injection molding machine according to claim 1, characterized in that, One of the upper die pressing block (1) and the lower die pressing block (2) is provided with a guide groove (21), and the other is provided with a guide protrusion (11). The guide protrusion (11) can slide along the guide groove (21).

8. The sealing device for an injection molding machine according to any one of claims 1-7, characterized in that, The flexible pressure block (3) is interference-fitted into the mounting groove (22); or The flexible pressure block (3) is bonded to the mounting groove (22); or The flexible pressure block (3) is connected to the mounting groove (22) by fasteners.

9. A sealing mold, characterized in that, The device includes a sealing device for an injection molding machine as described in any one of claims 1-8, wherein the sealing mold seals the double-layer ribbon cable (10) through the sealing device for the injection molding machine, wherein the double-layer ribbon cable (10) has a molding position on one side of the sealing device for the injection molding machine, and the sealing mold performs injection molding at the molding position.

Images