A precision injection mold with quick replaceable module

Abstract

The utility model relates to the field of mould structure design, especially a precision injection mould with quick replacement module, which comprises a machine body, a hydraulic cylinder, a pressing plate, a guide rail and a lower mould, the hydraulic cylinder is symmetrically installed on the upper part of the machine body, the piston rod of the hydraulic cylinder slides through the upper part in the machine body, the pressing plate is arranged between the end parts of the piston rods of the two hydraulic cylinders, the guide rails are arranged on the two opposite end faces of the upper part and the lower part in the machine body, and the lower mould is slidably arranged outside the guide rail of the lower part. The utility model is designed by linkage of the guide rail, the clamping block and the cylinder, realizes quick unlocking and sliding of the upper and lower moulds, shortens the replacement time from the traditional bolt fixing mode, significantly reduces the downtime, automatically ejects the product under the pushing of the reset spring, improves the demoulding success rate, and realizes the mould pushing and pulling operation by one person through the convex handle design on the front side of the mould and the guide rail, thereby reducing the manual operation strength.

Description

Technical Field

[0001] This utility model relates to the field of mold structure design, and in particular to a precision injection mold with quick module replacement. Background Technology

[0002] Injection molds are specialized tools used in plastic injection molding processes. They consist of two parts: a moving mold and a fixed mold. By closing the mold to form a cavity structure, molten plastic is injected into it, and after cooling and solidification, a plastic product with a precise shape is obtained.

[0003] In the traditional injection molding industry, mold replacement and positioning mainly rely on bolt tightening and manual calibration. Specifically, existing molds are mostly fixed to the machine body with bolts, and each replacement requires the removal of multiple bolts, which takes more than 30 minutes, resulting in excessive downtime and seriously affecting the flexibility of multi-variety, small-batch production.

[0004] To address these technical issues, a precision injection mold with quick module replacement was specially designed. Utility Model Content

[0005] In order to overcome the shortcomings of the existing technology, the present invention provides a precision injection mold with quick module replacement.

[0006] The technical solution is as follows: A precision injection mold with quick module replacement includes a body, hydraulic cylinders, pressure plates, guide rails, a lower mold, an upper mold, clamping blocks, and cylinders. The upper part of the body is equipped with an injection hopper. Hydraulic cylinders are symmetrically installed on the upper part of the body. The piston rods of the hydraulic cylinders slide through the upper part of the body. A pressure plate is provided between the ends of the piston rods of the two hydraulic cylinders. Guide rails are provided on two opposite end faces of the upper and lower parts of the body. The lower mold is slidably mounted on the outside of the lower guide rail, and the upper mold is slidably mounted on the outside of the upper guide rail. Slots are provided on both sides of the upper and lower molds. Clamping blocks are slidably mounted on the upper and lower parts of the body corresponding to the sides of the upper and lower molds. The ends of the clamping blocks slide into the corresponding slots. Cylinders are installed on the outside of the clamping blocks on both sides of the upper and lower parts of the body.

[0007] Furthermore, it is particularly preferred that the mold also includes handles, with protruding handles provided on the front sides of both the upper and lower molds.

[0008] In addition, it is particularly preferred that the mold also includes guide rods, with guide rods provided at each corner of the upper part of the lower mold, and positioning slots opened at each corner of the interior of the upper mold. The upper mold slides down along the guide rods through the positioning slots and closes with the lower mold.

[0009] Furthermore, it is particularly preferred that a buffer spring is included, with the buffer spring arranged around the outside of the guide rod.

[0010] Furthermore, it is particularly preferred that the mold also includes ejector pins and return springs, with ejector pins slidably disposed on both sides of the upper part of the lower mold, and return springs disposed at the sliding connection between the ejector pins and the lower mold.

[0011] In addition, it is particularly preferred that the machine also includes a water tank, a water pump and water pipes. The water tank is installed at the rear of the machine body, and water pumps are installed on both sides of the water tank. The water delivery end of the water pump is connected to a water pipe, and the water pipes on both sides are connected to both sides of the upper mold.

[0012] Beneficial effects: 1. This utility model achieves rapid unlocking and sliding of the upper and lower molds through the linkage design of guide rail, locking block and cylinder. The mold changing time is shortened by the traditional bolt fixing method, which significantly reduces downtime. The ejector rod automatically ejects the product under the push of the reset spring, which can improve the demolding success rate. The protruding handle design on the front side of the mold, combined with the guide rail, allows a single person to complete the mold pushing and pulling operation, reducing the intensity of manual operation.

[0013] 2. This utility model ensures that the center lines of the upper and lower molds are automatically aligned with the axis of the injection hopper during mold changing by guiding the guide rod and positioning through groove, reducing manual calibration time and improving mold changing accuracy; the water tank and water pump cooling system rapidly reduces the mold temperature through circulating water flow, shortening the plastic curing time, and the cooling channels are evenly distributed on both sides of the upper mold to avoid uneven shrinkage of the product caused by local overheating. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0015] Figure 2 This is a cross-sectional structural diagram of the components of this utility model, including the body, hydraulic cylinder, and pressure plate.

[0016] Figure 3 This is a structural diagram of the guide rail, lower mold, and upper mold components of this utility model.

[0017] Figure 4 This is a structural schematic diagram of the push rod, return spring, and handle of this utility model.

[0018] Figure 5 This is a structural schematic diagram of the water tank, water pump, and water pipe components of this utility model.

[0019] The above-mentioned attached drawings include the following reference numerals: 1-body, 2-hydraulic cylinder, 3-pressure plate, 4-guide rail, 5-lower mold, 6-upper mold, 7-clamping block, 8-cylinder, 9-guide rod, 10-buffer spring, 11-push rod, 12-reset spring, 13-water tank, 14-water pump, 15-water pipe, 16-handle. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] Example: A precision injection mold with quick-change modules, such as Figures 1-5 As shown, the machine includes a body 1, hydraulic cylinders 2, pressure plates 3, guide rails 4, a lower mold 5, an upper mold 6, a clamping block 7, and cylinders 8. The upper part of the body 1 is equipped with a glue injection hopper, which is used to precisely inject molten plastic into the closed cavity. The body 1 serves as the support frame for the mold. Hydraulic cylinders 2 are symmetrically mounted on the upper part of the body 1. The piston rods of the hydraulic cylinders 2 slide through the upper part of the body 1. A pressure plate 3 is located between the ends of the piston rods of the two hydraulic cylinders. The hydraulic cylinders 2 drive the pressure plate 3 to move up and down, providing the closing force required for mold closing. Guide rails 4 are provided on two opposite end faces of the upper and lower parts of the body 1. The lower guide rail 4... The lower mold 5 is externally slidably mounted, and the upper mold 6 is externally slidably mounted on the upper guide rail 4. The lower mold 5 and the upper mold 6 close to form a cavity for plastic molding. The upper mold 6 and the lower mold 5 are provided with slots on both sides. The upper and lower inner parts of the machine body 1 are provided with locking blocks 7 corresponding to the upper mold 6 and the lower mold 5. The ends of the locking blocks 7 slide into the corresponding slots. The upper and lower inner parts of the machine body 1 are provided with cylinders 8 installed on the outside of the locking blocks 7 by bolts. The locking blocks 7 are driven by the cylinders 8 and inserted into the mold slots to achieve rigid locking. When unlocking, the cylinders 8 drive the locking blocks 7 to exit the slots, which facilitates quick mold replacement.

[0022] like Figure 1 , Figure 4 and Figure 5 As shown, it also includes a handle 16. The front sides of the upper mold 6 and the lower mold 5 are provided with protruding handles 16 by welding or bolting. The protruding handles on the front sides of the molds make it easier for the operator to push and pull the molds.

[0023] like Figure 1 and Figure 3 As shown, it also includes guide rods 9. Guide rods 9 are provided at each corner of the upper part of the lower mold 5. Positioning slots are opened at each corner of the interior of the upper mold 6. The upper mold 6 slides down along the guide rods 9 through the positioning slots and closes with the lower mold 5. The guide rods 9 cooperate with the positioning slots of the upper mold 6 to ensure that the center lines are aligned when the upper and lower molds are closed. During the mold closing process, the gap between the guide rods 9 and the positioning slots gradually decreases to achieve precision guidance.

[0024] like Figure 1 and Figure 3As shown, it also includes a buffer spring 10. The buffer spring 10 is arranged around the outside of the guide rod 9 to absorb the impact energy at the end of mold closing, reduce vibration, and release elastic potential energy when the mold opens, to assist the upper mold 6 to rise smoothly.

[0025] like Figure 3 and Figure 4 As shown, it also includes a push rod 11 and a return spring 12. The push rod 11 is slidably arranged on both sides of the upper part of the lower mold 5. The push rod 11 is engaged with the ejection hole of the lower mold 5 through a sliding bearing. A return spring 12 is provided at the sliding connection between the push rod 11 and the lower mold 5. The return spring 12 is sleeved on the outside of the push rod 11, and its two ends respectively press against the limiting rings of the lower mold 5 and the push rod 11. The push rod 11 ejects the product under the push of the return spring 12.

[0026] like Figure 1 and Figure 5 As shown, it also includes a water tank 13, a water pump 14, and water pipes 15. The water tank 13 is bolted to the rear of the machine body 1. The water pump 14 is mounted on both sides of the water tank 13 via flanges. The water supply end of the water pump 14 is connected to the water pipe 15 via quick-connect fittings. The water pipes 15 on both sides are connected to the two sides of the upper mold 6 respectively. The water tank 13 stores cooling water, and the water pump 14 circulates the cooling water to the mold cooling channel through the water pipes 15. The cooling channel is evenly distributed on both sides of the upper mold 6, so that the mold temperature drops rapidly.

[0027] When disassembling the old mold, the operator presses the mold replacement command, and the cylinder 8 drives the locking block 7 to slide outward. The end of the locking block 7 exits from the locking grooves on both sides of the upper and lower molds 5, releasing the mold lock. The operator holds the protruding handle 16 on the front side of the upper and lower molds 5 and pulls the lower mold 5 and the upper mold 6 outward horizontally along the guide rail 4. The ball bearing structure of the guide rail 4 reduces the sliding resistance of the mold, and the operation can be completed by one person. The lower mold 5 of the new mold is pushed into the machine body 1 along the lower guide rail 4, so that the guide rod 9 is aligned with the positioning through groove, ensuring the center line of the upper mold 6 and the lower mold 5. Aligning with the axis of the injection hopper, after the mold is in place, cylinder 8 pushes the locking block 7 to slide inward. The end of the locking block 7 inserts into the locking slots on both sides of the mold. Through the cooperation of the locking block 7 and the locking slots, the mold is rigidly fixed. Then, hydraulic cylinder 2 is activated, and the piston rod of hydraulic cylinder 2 extends downward, pushing the pressure plate 3 down. After the pressure plate 3 contacts the upper mold 6, it applies mold closing pressure. The upper mold 6 slides down along the guide rod 9 of the lower mold 5. The gap between the guide rod 9 and the guide hole of the upper mold 6 gradually decreases to ensure the alignment accuracy of the cavity when the upper and lower molds 5 are closed. The buffer spring 10 outside the guide rod 9... At the end of mold closing, the impact energy is absorbed, reducing vibration at the moment of mold contact and preventing damage to the precision cavity. High-pressure injection is used to fill the cavity formed by the closing of the upper and lower molds 5. The injection pressure is controlled by a closed-loop hydraulic system. Simultaneously, water pump 14 starts, pumping cooling water from water tank 13 through water pipe 15 into the cooling channels on both sides of the upper mold 6, lowering the mold temperature and accelerating plastic curing. After injection, the piston rod of hydraulic cylinder 2 retracts, causing the pressure plate 3 and upper mold 6 to rise. The upper mold 6 moves upward along guide rod 9, and buffer spring 10 releases its stored elastic potential energy, assisting... After the upper mold 6 is completely separated from the mold, the ejector pins 11 on both sides of the lower mold 5 are pushed upward by the return spring 12, thereby ejecting the product from the cavity of the lower mold 5. Then, the operator pulls the lower mold 5 out of the machine body 1 along the guide rail 4 through the handle 16, and removes the product manually or by a robotic arm. The ejector pins 11 automatically retract to their original position under the action of the return spring 12. After the product is removed, the lower mold 5 is pushed back to the machine body 1 along the guide rail 4. The cylinder 8 locks the locking block 7 again, and the guide rod 9 is re-aligned with the guide hole of the upper mold 6, ready for the next injection cycle.

[0028] The above description is merely an embodiment of this utility model and is not intended to limit the scope of this utility model. All equivalent substitutions made within the principles of this utility model should be included within the protection scope of this utility model. Contents not described in detail in this utility model are existing technologies known to those skilled in the art.

Claims

1. A precision injection mold with quick-change modules, comprising an organism (1), characterized in that, It also includes a hydraulic cylinder (2), a pressure plate (3), a guide rail (4), a lower mold (5), an upper mold (6), a clamping block (7), and a cylinder (8). The upper part of the machine body (1) is provided with a glue injection hopper. Hydraulic cylinders (2) are symmetrically installed on the upper part of the machine body (1). The piston rod of the hydraulic cylinder (2) slides through the upper part of the machine body (1). A pressure plate (3) is provided between the ends of the piston rods of the two hydraulic cylinders. Guide rails (4) are provided on the two opposite end faces of the upper and lower parts of the machine body (1). The guide rail (4) of the upper part is slidably provided with a lower mold (5), and the guide rail (4) of the upper part is slidably provided with an upper mold (6). The upper mold (6) and the lower mold (5) are provided with slots on both sides. The upper and lower parts of the machine body (1) are provided with locking blocks (7) corresponding to the upper mold (6) and the lower mold (5) on both sides. The ends of the locking blocks (7) are slidably inserted into the corresponding slots. Cylinders (8) are installed on the upper and lower parts of the machine body (1) corresponding to the locking blocks (7) on both sides.

2. A precision injection mold with a quick-change module as described in claim 1, characterized in that, It also includes handles (16), with protruding handles (16) provided on the front sides of both the upper mold (6) and the lower mold (5).

3. A precision injection mold with a quick-change module as described in claim 2, characterized in that, It also includes guide rods (9), and guide rods (9) are provided at each corner of the upper part of the lower mold (5). Positioning slots are opened at each corner of the interior of the upper mold (6). The upper mold (6) slides down along the guide rods (9) through the positioning slots and closes with the lower mold (5).

4. A precision injection mold with a quick-change module as described in claim 3, characterized in that, It also includes a buffer spring (10), and the guide rod (9) is surrounded by a buffer spring (10).

5. A precision injection mold with a quick-change module as described in claim 4, characterized in that, It also includes a push rod (11) and a return spring (12). The push rod (11) is slidably arranged on both sides of the upper part of the lower mold (5), and the return spring (12) is arranged at the sliding connection between the push rod (11) and the lower mold (5).

6. A precision injection mold with a quick-change module as described in claim 5, characterized in that, It also includes a water tank (13), a water pump (14) and a water pipe (15). The water tank (13) is installed at the rear of the machine body (1). The water pump (14) is installed on both sides of the water tank (13). The water pump (14) is connected to the water pipe (15) at the water delivery end. The water pipes (15) on both sides are connected to the two sides of the upper mold (6).

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