Rubber seal injection mold

Abstract

This invention discloses an injection mold for rubber seals, relating to the field of injection mold technology. The invention includes a rear mold base, a front mold base, and a mounting plate. The rear mold base and the mounting plate are fixed together by a stud and nut. The front mold base is located between the rear mold base and the mounting plate and can slide back and forth by being limited by the stud. The rear mold core is fixedly installed on the side of the rear mold base near the front mold base, and its top end has a rear injection tube. The front mold core is fixedly installed on the side of the front mold base near the rear mold base, and its top end has a front injection tube. This invention enables the independent use of multiple injection molds, ensuring injection efficiency while reducing mold maintenance and replacement costs. It also prevents the rubber seal from carrying long connecting branches after cooling and solidification, reducing waste of rubber raw materials. Furthermore, it avoids cooling and solidification at the rubber outlet, ensuring continuous injection.

Description

Technical Field

[0001] This invention relates to the field of injection mold technology, and specifically to an injection mold for a rubber seal. Background Technology

[0002] Rubber seals are round rubber products used for sealing, preventing fluids or solid particles from leaking between adjacent mating surfaces and preventing external impurities such as dust and moisture from entering the interior of machinery and equipment. In order to achieve rapid and one-piece molding during the production process, rubber seals are manufactured by injection molding, which requires the use of injection molds.

[0003] For example, Chinese invention patent CN119058026B discloses a molding die for processing rubber seals. Rubber material is injected into multiple injection mold grooves simultaneously through a combination of multiple injection tubes and injection cavities. After the injection is completed, the electromagnetic ring at the limiting sleeve is activated, and the pusher cone moves toward the limiting sleeve and closes with it. On the one hand, the excess rubber material in the injection cavity is pushed into the injection mold groove, and on the other hand, the injection mold groove and the injection cavity are fitted without gap. The seal formed by each injection mold groove is an independent unit. After the mold is opened, the moving mold sleeve separates outward from the fixed mold sleeve, driving the fixed mold sleeve to flip downward toward the discharge port, and collective demolding is achieved under the action of gravity.

[0004] Based on the aforementioned patents and existing technologies, the current rubber seal injection molds still have the following shortcomings during use: To improve injection efficiency, existing rubber seal injection molds often incorporate multiple injection cavities within a single mold, interconnected by injection holes. However, if one cavity malfunctions, the entire mold must be disassembled or replaced, increasing maintenance and replacement costs. While individual injection molding addresses this issue, the injection hole is closer to the injection cavity. During cooling and shaping, the rubber at the discharge port can solidify, clogging the port and preventing extrusion in subsequent injections, thus disrupting the process. To prevent solidification at the discharge port and better control the cooling time, injection holes are often designed to be longer. However, this results in longer connecting branches in the seal, leading to material waste. Summary of the Invention

[0005] The purpose of this invention is to address the following issues: the high cost of maintenance and replacement in injection molds with multiple injection cavities, the tendency for the injection hole to be closer to the injection cavity during individual injection, the ease with which the discharge hole can become clogged and affect the normal progress of injection, and the waste of rubber raw materials due to the long design of the injection hole. This invention provides a rubber seal injection mold.

[0006] To achieve the above objectives, the present invention specifically adopts the following technical solution: A rubber seal injection mold includes a rear mold base, a front mold base, and a mounting plate. The rear mold base and the mounting plate are fixed together by a stud and a nut. The front mold base is located between the rear mold base and the mounting plate and can slide back and forth by being limited by the stud. The rear mold core is fixedly installed on the side of the rear mold base near the front mold base, and the top of the rear mold core is provided with a rear injection pipe. The front mold core is fixedly installed on the side of the front mold base near the rear mold base, and the top of the front mold core is provided with a front injection pipe. A connecting assembly is located at the top of the rear injection pipe and the front injection pipe, and is used to transport rubber through the rear injection pipe and the front injection pipe to the space between the rear mold core and the front mold core.

[0007] Furthermore, the rear mold base and the front mold base are arranged on the left and right sides of the rear side of the mounting plate, and each of the four corners of the rear mold base and the front mold base is connected to the mounting plate by four studs.

[0008] Furthermore, the rear mold core and the rear injection tube, as well as the front mold core and the front injection tube, are all integrally molded. The rear injection tube includes a semi-cylinder at the bottom and a full cylinder at the top. The front injection tube is designed as a semi-cylinder and is adapted to the semi-cylinder at the bottom of the rear injection tube. After the rear injection tube and the front injection tube are attached, they can form a closed circular tube. Each set of the rear injection tube and the front injection tube is provided with a separate connecting component at the top.

[0009] Furthermore, the connecting assembly includes a plug tube, which is inserted into the top of the rear injection tube and the front injection tube. The connecting tube is inserted downward into the inner side of the top of the plug tube, and a discharge hole is provided on the periphery of the bottom of the connecting tube. The partition is fixedly connected to the periphery of the top of the connecting tube, and the spring is fixedly connected between the bottom end of the partition and the top of the plug tube, with the bottom of the spring recessed into the interior of the top of the plug tube.

[0010] Furthermore, the bottom of the insertion tube is provided with a slot. After the insertion tube is inserted into the top of the rear injection tube and the front injection tube through the slot, the inner side of the bottom of the insertion tube is inserted downward into the interior of the rear injection tube and the front injection tube and is attached to the inner wall of the rear injection tube and the front injection tube. The outer side of the bottom of the insertion tube wraps around the outer wall of the rear injection tube and the front injection tube.

[0011] Furthermore, the middle part of the connector tube has an outwardly extending buffer cavity. During injection molding, the discharge hole at the bottom of the connector tube is located inside the buffer cavity. When the injection molding is completed, the discharge hole at the bottom of the connector tube moves upward to the inside of the top of the connector tube.

[0012] Furthermore, a conveying pipe is provided above the rear mold base and the front mold base. The conveying pipe is used to connect with the rubber extrusion pipe of the injection molding machine. A diversion pipe is provided at the bottom of the conveying pipe and at the corresponding position of the connecting assembly. A connector is fixedly installed at the bottom of each diversion pipe. The bottom of each connector is fixedly installed to the top of the connecting pipe by a fixing screw sleeve.

[0013] Furthermore, a base plate is fixedly installed at the bottom end of the rear mold base and the mounting plate. The base plate is used to install the drive assembly to drive the rear mold base and the mounting plate to move up and down as a whole.

[0014] Furthermore, a connecting plate is provided at the front end of the front mold base, and the connecting plate and the front mold base are fixedly installed. A hydraulic cylinder is fixedly installed at the front end of the mounting plate, and the telescopic shaft on the rear side of the hydraulic cylinder is fixedly installed at the center of the connecting plate.

[0015] Furthermore, cooling channels are provided inside the side walls of both the rear mold base and the front mold base. A sleeve pipe is inserted between the cooling channels of adjacent rear mold bases and between the cooling channels of adjacent front mold bases. The cooling channels of the leftmost rear mold base and the front mold base and the cooling channels of the rightmost rear mold base and the front mold base are respectively connected to a cooling medium input pipe and a circulation pipe.

[0016] The beneficial effects of this invention are as follows: This invention, through the design of multiple sets of rear mold bases and front mold bases that can be individually installed and combined using studs and mounting plates, combined with the individual delivery of rubber by the connecting components, enables the independent use of multiple injection molds. This ensures injection efficiency while reducing mold maintenance and replacement costs. Furthermore, the design of the connecting components and the rear and front injection pipes allows the connecting components to be moved away from the rear and front mold cores after injection molding. Simultaneously, the rubber inside the rear and front injection pipes separates in advance, preventing the rubber seals from carrying long connecting branches after cooling and solidification, reducing rubber material waste, and minimizing temperature transfer during the cooling and solidification of the rubber seals. This also prevents cooling and solidification at the rubber outlet of the connecting components, ensuring continuous injection molding. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the three-dimensional structure of the present invention. Figure 1 ; Figure 2 This is a schematic diagram of the three-dimensional structure of the present invention. Figure 2 ; Figure 3 This is a schematic diagram of the three-dimensional structure of the present invention. Figure 3 ; Figure 4 This is an exploded view of a partial three-dimensional structure of the present invention; Figure 5This is a three-dimensional structural diagram of a single rear mold base and a front mold base of the present invention; Figure 6 The single-unit rear mold base and front mold base three-dimensional structure of the present invention are exploded Figure 1 ; Figure 7 The single-unit rear mold base and front mold base three-dimensional structure of the present invention are exploded Figure 2 ; Figure 8 The single-unit rear mold base and front mold base three-dimensional structure of the present invention are exploded Figure 3 ; Figure 9 This is a cross-sectional perspective view of the rear mold core, front mold core, and connecting components of the present invention. Figure 10 This is an exploded three-dimensional cross-sectional view of the rear injection tube, the front injection tube, and the connecting assembly of the present invention. Figure 11 This is a three-dimensional structural diagram of the present invention during demolding; Figure 12 This is a three-dimensional structural diagram of the rear mold core, front mold core, and connecting components during demolding according to the present invention; Figure 13 This is a cross-sectional three-dimensional structural diagram of the post-injection pipe and connecting components during demolding of the present invention; Figure 14 This is a partial cross-sectional three-dimensional structural diagram of the connecting pipe of the present invention; Figure 15 This is an exploded view of the three-dimensional structure between the multiple sets of rear mold bases and the front mold bases of the present invention; Figure 16 This is a cross-sectional three-dimensional structural diagram of the rear mold base of the present invention; Figure 17 This is an exploded three-dimensional cross-sectional view of the rear mold base of the present invention.

[0018] Reference numerals: 1. Rear mold base; 2. Front mold base; 3. Mounting plate; 4. Stud; 5. Rear mold core; 501. Rear injection pipe; 6. Front mold core; 601. Front injection pipe; 7. Connecting assembly; 701. Insert pipe; 702. Connecting pipe; 7021. Discharge hole; 703. Partition plate; 704. Spring; 705. Slot; 706. Buffer cavity; 8. Base plate; 9. Conveying pipe; 10. Connector; 11. Fixing screw sleeve; 12. Connecting plate; 13. Hydraulic cylinder; 14. Cooling channel; 15. Sleeve pipe. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.

[0020] A preferred embodiment of the present invention, a rubber seal injection mold, will be described in detail below: Example 1: As Figures 1-4 , Figures 6-8 As shown, a rubber seal injection mold includes a rear mold base 1, a front mold base 2, and a mounting plate 3. The rear mold base 1 and the mounting plate 3 are fixed together by studs 4 and nuts. The front mold base 2 is located between the rear mold base 1 and the mounting plate 3 and can slide back and forth by being limited by the studs 4. Positioning guide sleeves are provided at the sliding connections between the four corners of the front mold base 2 and the studs 4. The engagement of the positioning guide sleeves with the studs 4 reduces wear and improves the stability of the front mold base 2's back-and-forth movement.

[0021] The rear mold core 5 is fixedly installed on the side of the rear mold base 1 near the front mold base 2, and the top of the rear mold core 5 is provided with a rear injection pipe 501. The front mold core 6 is fixedly installed on the side of the front mold base 2 near the rear mold base 1, and the top of the front mold core 6 is provided with a front injection pipe 601. The connecting component 7 is located on the top of the rear injection pipe 501 and the front injection pipe 601, and is used to transport rubber through the rear injection pipe 501 and the front injection pipe 601 to the space between the rear mold core 5 and the front mold core 6.

[0022] In use, the movement of the front mold base 2 causes the front mold core 6 and the rear mold core 5 to close. After mold closing, the connecting assembly 7, in cooperation with the rear injection pipe 501 and the front injection pipe 601, delivers rubber between the rear mold core 5 and the front mold core 6, thus achieving injection molding. After injection molding and cooling, the forward movement of the front mold base 2 causes the front mold core 6 and the rear mold core 5 to separate, facilitating the removal of the molded rubber seal.

[0023] like Figures 1-4 As shown, the rear mold base 1 and the front mold base 2 are arranged on the left and right sides of the rear side of the mounting plate 3, and each of the four corners of a single rear mold base 1 and front mold base 2 is connected to the mounting plate 3 by four studs 4. This allows for the individual installation and combined assembly of the rear mold base 1 and the front mold base 2, and enables the inspection and replacement of a single rear mold base 1 and front mold base 2, reducing operating costs.

[0024] like Figures 5-9 As shown, the rear mold core 5 and the rear injection tube 501, as well as the front mold core 6 and the front injection tube 601, are all integrally molded. The rear injection tube 501 includes a semi-cylinder at the bottom and a full cylinder at the top. The front injection tube 601 is a semi-cylinder design and is adapted to the semi-cylinder at the bottom of the rear injection tube 501. After the rear injection tube 501 and the front injection tube 601 are attached, they can form a closed cylinder. Each set of rear injection tubes 501 and front injection tubes 601 is provided with a separate connecting component 7 at the top. This enables the separate delivery of rubber between the rear mold core 5 and the front mold core 6 in a single set of rear mold base 1 and front mold base 2.

[0025] It should be noted that the rear injection tube 501 includes a bottom semi-cylinder and a top full cylinder, and the front injection tube 601 adopts a semi-cylinder design. During injection molding, if... Figures 8-9 As shown, the bottom of the insertion pipe 701 in the connecting assembly 7 wraps around both the rear injection pipe 501 and the front injection pipe 601, ensuring the stable closure of the rear injection pipe 501 and the front injection pipe 601, so as to transport the rubber through the rear injection pipe 501 and the front injection pipe 601 to the space between the rear mold core 5 and the front mold core 6; and after injection molding is completed, as Figures 12-13 As shown, the bottom of the insertion tube 701 in the connecting assembly 7 only wraps around the top of the rear injection tube 501, allowing the front injection tube 601 to move forward with the front mold base 2 and the front mold core 6 to complete the separation. The insertion tube 701 maintains the full cylindrical wrapping around the top of the rear injection tube 501 to serve as a guide and improve the stability of the vertical insertion between the insertion tube 701 and the rear injection tube 501 and the front injection tube 601.

[0026] like Figures 1-3 As shown, a base plate 8 is fixedly installed at the bottom of the rear mold base 1 and the mounting plate 3. The base plate 8 is used to install the drive assembly to drive the rear mold base 1 and the mounting plate 3 to move up and down as a whole. Therefore, after injection molding, the drive assembly, in conjunction with the base plate 8, drives the rear mold base 1 and the mounting plate 3 to move downwards, causing the front injection pipe 601 to disengage from the insert pipe 701, preparing for subsequent forward movement and disengagement from the rear mold core 5. During re-injection, when the front mold core 6 and the rear mold core 5 re-close, and the front injection pipe 601 and the rear injection pipe 501 re-close, the rear mold base 1 and the mounting plate 3 are driven upwards, causing the insert pipe 701 to re-interlock with the rear injection pipe 501 and the front injection pipe 601, facilitating rubber delivery. It should be noted that the drive assembly can be a hydraulic lifting assembly, a screw lifting assembly, or a folding cross lifting assembly.

[0027] like Figure 4 As shown, a connecting plate 12 is provided at the front end of the front mold base 2. The connecting plate 12 and the front mold base 2 are fixedly installed. A hydraulic cylinder 13 is fixedly installed at the front end of the mounting plate 3. The telescopic shaft on the rear side of the hydraulic cylinder 13 is fixedly installed at the center of the connecting plate 12. Therefore, through the action of the hydraulic cylinder 13, in conjunction with the connecting plate 12, the front mold base 2 can be driven to move back and forth synchronously.

[0028] like Figures 15-17As shown, cooling channels 14 are provided inside the side walls of both the rear mold base 1 and the front mold base 2. Connecting sleeves 15 are inserted between the cooling channels 14 of adjacent rear mold bases 1 and between the cooling channels 14 of adjacent front mold bases 2. Cooling channels 14 of the leftmost rear mold base 1 and front mold base 2 and the rightmost rear mold base 1 and front mold base 2 are respectively connected to cooling medium inlet pipes and circulation pipes. Therefore, through the function of the connecting sleeves 15, after multiple sets of rear mold bases 1 and front mold bases 2 are assembled, the cooling channels 14 between each rear mold base 1 and each front mold base 2 are connected. Cooling medium is then supplied to the cooling channel 14 on one side through the cooling medium inlet pipe and flows inside all the rear mold bases 1 and front mold bases 2, thereby accelerating the cooling and shaping of the rubber seal between the rear mold core 5 and the front mold core 6. The cooled medium, after cooling, flows out through the circulation pipe on the other side and is recycled after heat exchange or waste heat recovery. It should be noted that, as Figures 16-17 As shown, the design of the internal cooling channel 14 of the front mold base 2 is the same as that of the rear mold base 1, so no further illustrations are provided.

[0029] Working principle: During injection molding, the front mold base 2 moves, causing the front mold core 6 and the rear mold core 5 to close. After the mold is closed, the connecting component 7, in cooperation with the rear injection pipe 501 and the front injection pipe 601, delivers the rubber between the rear mold core 5 and the front mold core 6, thereby realizing injection molding.

[0030] After injection molding is completed, the base plate 8 and the drive assembly work together to move the rear mold base 1 and the mounting plate 3 downwards, so that the front injection pipe 601 is released from the casing of the plug pipe 701. In conjunction with the design of the internal cooling channel 14 on the side wall of the rear mold base 1 and the front mold base 2, the rubber seals injected between the rear mold core 5 and the front mold core 6 are cooled and solidified quickly by introducing a cooling medium.

[0031] After the rubber seal has cooled and solidified, the hydraulic cylinder 13 and the connecting plate 12 work together to move the front mold base 2 forward synchronously, thereby separating the front mold core 6 from the rear mold core 5, making it easier to remove the rubber seal.

[0032] After removing the rubber seal, the front mold base 2 is pushed backward synchronously by the action of the hydraulic cylinder 13 and the connecting plate 12, so that the front mold base 2 drives the front mold core 6 and the rear mold core 5 to re-close the mold. Then, through the action of the base plate 8 and the drive assembly, the rear mold base 1 and the mounting plate 3 are moved upward as a whole, so that the insertion pipe 701 is re-inserted into the rear injection pipe 501 and the front injection pipe 601 for a new round of injection molding.

[0033] Example 2: Figures 8-10 , Figures 13-14As shown, the connecting assembly 7 includes a plug tube 701, which is inserted into the top of the rear injection tube 501 and the front injection tube 601. A connecting tube 702 is inserted downward into the inner side of the top of the plug tube 701, and a discharge hole 7021 is provided on the outer periphery of the bottom of the connecting tube 702. A partition plate 703 is fixedly connected to the outer periphery of the top of the connecting tube 702. A spring 704 is fixedly connected between the bottom end of the partition plate 703 and the top of the plug tube 701, and the bottom of the spring 704 is recessed into the interior of the top of the plug tube 701 to improve the stability of the spring 704 installation.

[0034] like Figure 10 , Figure 13 As shown, the bottom of the insertion tube 701 is provided with a slot 705. After the insertion tube 701 is inserted into the top of the rear injection tube 501 and the front injection tube 601 through the slot 705, the inner side of the bottom of the insertion tube 701 is inserted downward into the interior of the rear injection tube 501 and the front injection tube 601 and is attached to the inner wall of the rear injection tube 501 and the front injection tube 601. The outer side of the bottom of the insertion tube 701 wraps around the outer wall of the rear injection tube 501 and the front injection tube 601. Therefore, through the design of the slot 705, when the slot 705 is inserted into the top of the rear injection tube 501 and the front injection tube 601, the inner side of the bottom of the insertion tube 701 is inserted downward into the interior of the rear injection tube 501 and the front injection tube 601. This ensures that the rubber does not come into contact with the inner wall of the top area of ​​the rear injection tube 501 and the front injection tube 601 during the process of the rubber being transported into the interior of the rear injection tube 501 and the front injection tube 601 through the insertion tube 701. After injection molding is completed, the rear injection tube 501 and the front injection tube 601 move downward relative to the insertion tube 701. Utilizing the frictional force of the rubber adhering to the inner wall of the bottom of the insertion tube 701, the rubber can separate from the bottom outlet of the insertion tube 701 inside the bottom of the rear injection tube 501 and the front injection tube 601, thereby preventing the rubber seal from carrying long connecting branches after cooling and solidification. At the same time, by utilizing the upward movement of the insertion tube 701 relative to the rear injection tube 501 and the front injection tube 601, the insertion tube 701 is moved away from the rear mold core 5 and the front mold core 6, and the rubber is separated. This reduces the temperature transfer during the cooling and shaping of the rubber seal, thereby preventing the outlet at the bottom of the insertion tube 701 from cooling and solidifying, and ensuring the continuous injection molding process.

[0035] like Figure 10 , Figure 13As shown, the insertion tube 701 has an outwardly extending buffer cavity 706 in the middle. During injection molding, the discharge hole 7021 at the bottom of the connecting tube 702 is located inside the buffer cavity 706. After injection molding is completed, the discharge hole 7021 at the bottom of the connecting tube 702 moves upward to the inside of the top of the insertion tube 701. Therefore, during injection molding, the rubber inside the connecting tube 702 can enter the buffer cavity 706 through the discharge hole 7021 and then be conveyed downward from the insertion tube 701 to complete the injection molding. After injection molding is completed, the inner wall of the top of the insertion tube 701 blocks the discharge hole 7021, preventing the rubber inside the connecting tube 702 from flowing out, thus avoiding the phenomenon of the rubber at the bottom of the insertion tube 701 flowing downward, and also facilitating the separation of the rubber at the bottom opening of the insertion tube 701.

[0036] like Figure 1 , Figure 5 As shown, a conveying pipe 9 is provided above the rear mold base 1 and the front mold base 2. The conveying pipe 9 is used to connect to the rubber extrusion pipe of the injection molding machine. A branch pipe is provided at the bottom of the conveying pipe 9 where it is aligned with the connecting assembly 7. A connector 10 is fixedly installed at the bottom of each branch pipe. The bottom of each connector 10 is fixedly installed to the top of the connecting pipe 702 via a fixing screw sleeve 11. This allows the rubber extruded from the injection molding machine to be conveyed into the interior of each connecting pipe 702.

[0037] Working principle: During injection molding, the rubber extruded by the injection molding machine is conveyed to the interior of each connecting pipe 702 through the diversion pipe of the delivery pipe 9 by the connector 10 and the fixing screw sleeve 11. Then, it enters the buffer chamber 706 in the middle of the insertion pipe 701 through the discharge hole 7021 at the bottom of the connecting pipe 702. By connecting the bottom of the insertion pipe 701 with the rear injection pipe 501 and the front injection pipe 601, the rubber inside the insertion pipe 701 can be conveyed downward to the rear injection pipe 501 and the front injection pipe 601, thereby completing the injection molding.

[0038] After injection molding is completed, the rear mold base 1 and the front mold base 2 are driven to move downwards, which in turn drives the rear injection pipe 501 and the front injection pipe 601 to move downwards. At this time, the spring 704 is in a compressed state. Under the action of the spring 704, the insertion pipe 701 first follows the rear injection pipe 501 and the front injection pipe 601 to move downwards, while the connecting pipe 702 remains stationary. This causes the discharge hole 7021 at the bottom of the connecting pipe 702 to retract to the inside of the top of the insertion pipe 701, using the inner wall of the insertion pipe 701 to block the discharge hole 7021 and stop the delivery of rubber.

[0039] After the spring 704 is in its natural state, the rear injection tube 501 and the front injection tube 601 continue to move downwards, and the insertion tube 701 will move upwards relative to the rear injection tube 501 and the front injection tube 601. This allows the insertion tube 701 to move away from the rear mold core 5 and the front mold core 6, while the rubber can also be separated at the outlet at the bottom of the insertion tube 701. This prevents the rubber seal from carrying long connecting branches after cooling and solidification, and reduces the temperature transfer during the cooling and solidification of the rubber seal. This also prevents the outlet at the bottom of the insertion tube 701 from cooling and solidifying, ensuring continuous injection molding.

[0040] Meanwhile, the bottom of the insertion tube 701 no longer wraps around the front injection tube 601, allowing the rear mold core 5 and the front mold core 6 to be separated for the removal of the rubber seal.

[0041] During the next injection molding cycle, after the rear mold core 5 and the front mold core 6 complete mold closing, and the front injection pipe 601 and the rear injection pipe 501 close simultaneously, the rear mold base 1 and the front mold base 2 are driven to move upward. Then, the rear injection pipe 501 and the front injection pipe 601 are inserted upward to connect with the insertion pipe 701. After the top of the rear injection pipe 501 contacts the inner wall of the top of the slot 705, the rear injection pipe 501 and the front injection pipe 601 continue to move upward, which pushes the insertion pipe 701 to compress the spring 704 upward and move upward relative to the connecting pipe 702. This causes the discharge hole 7021 at the bottom of the connecting pipe 702 to extend downward again to the inside of the buffer cavity 706, so that the rubber can be delivered normally.

[0042] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A rubber seal injection mold, comprising a rear mold base (1), a front mold base (2), and a mounting plate (3), characterized in that, The rear mold base (1) and the mounting plate (3) are fixed together by the engagement of studs (4) and nuts. The front mold base (2) is located between the rear mold base (1) and the mounting plate (3) and can slide back and forth by the limiting of the studs (4). The rear mold core (5) is fixedly installed on the side of the rear mold base (1) near the front mold base (2), and the top of the rear mold core (5) is provided with a rear injection pipe (501). The front mold core (6) is fixedly installed on the side of the front mold base (2) near the rear mold base (1), and the top of the front mold core (6) is provided with a front injection pipe (601). A connecting assembly (7) is located on top of the rear injection pipe (501) and the front injection pipe (601) for conveying rubber through the rear injection pipe (501) and the front injection pipe (601) to between the rear mold core (5) and the front mold core (6).

2. The rubber seal injection mold according to claim 1, characterized in that, The rear mold base (1) and the front mold base (2) are arranged in a left-right arrangement on the rear side of the mounting plate (3), and the four corners of each set of the rear mold base (1) and the front mold base (2) are connected to the mounting plate (3) by four studs (4).

3. The rubber seal injection mold according to claim 1, characterized in that, The rear mold core (5) and the rear injection tube (501), as well as the front mold core (6) and the front injection tube (601), are all integrally molded. The rear injection tube (501) includes a semi-cylinder at the bottom and a full cylinder at the top. The front injection tube (601) is designed as a semi-cylinder and is adapted to the semi-cylinder at the bottom of the rear injection tube (501). After the rear injection tube (501) and the front injection tube (601) are attached, they can form a closed cylinder. Each set of the rear injection tube (501) and the front injection tube (601) is provided with a connecting component (7) at the top.

4. The rubber seal injection mold according to claim 1, characterized in that, The connection component (7) includes: Insertion tube (701), which is inserted into the top of the rear injection tube (501) and the front injection tube (601); A connecting pipe (702) is inserted downwards into the inner side of the top of the insertion pipe (701), and a discharge hole (7021) is provided on the outer periphery of the bottom of the connecting pipe (702). A partition (703) is fixedly connected to the periphery of the top of the connecting pipe (702); A spring (704) is fixedly connected between the bottom end of the partition (703) and the top of the connector (701), and the bottom of the spring (704) is recessed into the interior of the top of the connector (701).

5. The rubber seal injection mold according to claim 4, characterized in that, The bottom of the insertion tube (701) is provided with a slot (705). After the insertion tube (701) is inserted into the top of the rear injection tube (501) and the front injection tube (601) through the slot (705), the inner side of the bottom of the insertion tube (701) is inserted downward into the interior of the rear injection tube (501) and the front injection tube (601) and is attached to the inner wall of the rear injection tube (501) and the front injection tube (601). The outer side of the bottom of the insertion tube (701) wraps the outer wall of the rear injection tube (501) and the front injection tube (601).

6. The rubber seal injection mold according to claim 4, characterized in that, The insertion tube (701) has an outwardly extending buffer cavity (706) in the middle. During injection molding, the discharge hole (7021) at the bottom of the connecting tube (702) is located inside the buffer cavity (706). When the injection molding is completed, the discharge hole (7021) at the bottom of the connecting tube (702) moves upward to the inside of the top of the insertion tube (701).

7. The rubber seal injection mold according to claim 4, characterized in that, A conveying pipe (9) is provided above the rear mold base (1) and the front mold base (2). The conveying pipe (9) is used to connect with the rubber extrusion pipe of the injection molding machine. A diversion pipe is provided at the bottom of the conveying pipe (9) and at the corresponding position of the connecting component (7). A connector (10) is fixedly installed at the bottom of each diversion pipe. The bottom of each connector (10) is fixedly installed to the top of the connecting pipe (702) by a fixing screw sleeve (11).

8. The rubber seal injection mold according to claim 1, characterized in that, A base plate (8) is fixedly installed at the bottom of the rear mold base (1) and the mounting plate (3). The base plate (8) is used to install a drive assembly to drive the rear mold base (1) and the mounting plate (3) to move up and down as a whole.

9. The rubber seal injection mold according to claim 1, characterized in that, The front mold base (2) is provided with a connecting plate (12), and the connecting plate (12) and the front mold base (2) are fixedly installed. The front end of the mounting plate (3) is fixedly installed with a hydraulic cylinder (13), and the telescopic shaft on the rear side of the hydraulic cylinder (13) is fixedly installed with the center of the connecting plate (12).

10. The rubber seal injection mold according to claim 1, characterized in that, Cooling channels (14) are provided inside the side walls of the rear mold base (1) and the front mold base (2). A sleeve pipe (15) is inserted between the cooling channels (14) of the adjacent rear mold base (1) and between the cooling channels (14) of the adjacent front mold base (2). The cooling channels (14) of the leftmost rear mold base (1) and the front mold base (2) and the cooling channels (14) of the rightmost rear mold base (1) and the front mold base (2) are respectively connected to a cooling medium input pipe and a circulation pipe.

Images