Multi-cavity high-speed injection mold structure

Abstract

The utility model relates to the technical field of injection molds, in particular to a multi-cavity high-speed injection mold structure which comprises a base, two L-shaped supports which are symmetrically arranged left and right are arranged at the top of the base, a lower mold is jointly supported by the tops of the two L-shaped supports, a plurality of injection molding cavities are formed in the top of the lower mold, and a jacking assembly is arranged at the top of the base. The jacking assembly comprises a first electric cylinder installed in the middle of the top of the base through bolts, a movable plate is arranged at the end of a movable rod of the first electric cylinder, multiple push rods are arranged at the top of the movable plate, the top ends of the push rods penetrate through the bottom of the lower mold and are located in the injection molding cavity, and push plates are arranged at the top ends of the push rods. According to the multi-cavity high-speed injection mold structure, through the design that the push plate in the jacking assembly is matched with the injection molding cavities, and the vertical jacking action driven by the first electric cylinder is matched, it is ensured that a product is evenly stressed during demolding, it is effectively ensured that the product is smoothly demolded, and workers can take out the product conveniently.

Description

Technical Field

[0001] The utility model relates to the technical field of injection molds, in particular to a multi-cavity high-speed injection mold structure. Background Art

[0002] A multi-cavity injection mold design is widely used in the injection molding industry. Its characteristic is the placement of multiple cavities within the same mold, allowing for the simultaneous molding of multiple identical or different products in a single injection process. Compared to single-cavity molds, multi-cavity injection molds significantly improve production efficiency and reduce unit production costs, making them suitable for high-volume production.

[0003] Utility model patent publication number CN213500598U discloses a multi-cavity, high-efficiency injection mold, comprising: a mold base, wherein the mold base is provided with at least two sets of assembly plates, each of which is provided with a forming die; a pouring system is provided on the mold base, and the pouring system includes pouring channels connected to each of the forming dies; a molding mechanism, which includes a molding template, a molding punch, a linkage plate, and a movable drive mechanism; and a mold clamping mechanism, which includes a lifting plate, a lifting rod, a lifting sleeve, and a lifting drive mechanism; the molding template is provided with a movable top plate, and the movable top plate is provided with a movable opening that cooperates with the lifting sleeve. Because the molding template divides the space within the mold base into multiple injection cavities, multiple or multiple groups of products can be injected at a time, improving processing efficiency.

[0004] Although the above-mentioned prior art has improved the processing efficiency in the design of the multi-cavity injection mold, there are still some defects and shortcomings in the specific use process. After the injection molding is completed, the product formed by the melt cooling will fall directly onto the molding punch under the action of gravity, resulting in the product being unable to be well separated from the molding punch during the demolding process. When the mobile drive mechanism drives the linkage plate to move backward, the molded product will always stay on the surface of the molding punch and cannot be smoothly dropped or taken out, thereby affecting the demolding effect. Assuming that in some cases, the molded product can fall onto the assembly template after the molding punch moves, but since the molded products of each mold cavity in the multi-cavity design will fall downward in turn, the products will collide with each other or hit the demolded products below after falling, which may cause damage to the product surface, deformation or affect the final quality. Therefore, the above-mentioned prior art has usage defects such as inconvenient operation and damaged product quality in actual application. In order to solve these problems, we propose a multi-cavity high-speed injection mold structure. Utility Model Content

[0005] The purpose of the present utility model is to provide a multi-cavity high-speed injection mold structure to solve the problems raised in the above background technology.

[0006] To achieve the above objectives, the present invention provides the following technical solutions:

[0007] A multi-cavity high-speed injection mold structure includes a base, with two symmetrically arranged L-shaped brackets on the top of the base. The L-shaped brackets are used to support the lower mold and provide lateral positioning for the U-shaped bracket. The tops of the two L-shaped brackets jointly support the lower mold, which is used to define an injection molding cavity and cooperate with a cooling system to accelerate product shaping. The top of the lower mold defines multiple injection molding cavities, which serve as the core molding area for multi-cavity synchronous injection molding. A lifting assembly is provided on the top of the base, which is used to drive a push plate to eject the molded product from the injection molding cavity.

[0008] The jacking assembly includes a first electric cylinder installed in the middle of the top of the base by bolts, the first electric cylinder provides jacking power and controls the jacking stroke through a movable rod, a movable plate is provided at the end of the movable rod of the first electric cylinder, the movable plate is used to synchronously drive multiple push rods to move vertically, a plurality of push rods are provided on the top of the movable plate, the push rods are used to transmit the jacking force to the push plate, the top end of the push rod passes through the bottom of the lower mold and is located in the injection molding cavity, the top end of the push rod is provided with a push plate, the push plate is in contact with the inner wall of the injection molding cavity, to ensure that the product is evenly stressed when ejected;

[0009] A U-shaped frame is provided on the top of the base, which is used to support the second electric cylinder and provide a guide for the lifting and lowering of the upper mold. A second electric cylinder is provided on the top of the U-shaped frame, which drives the upper mold to realize the opening and closing of the mold. The movable rod of the second electric cylinder passes through the top of the U-shaped frame and is connected to a U-shaped connecting plate. The U-shaped connecting plate provides a pipeline connection space for the injection port of the upper mold. The bottom of the U-shaped connecting plate is provided with an upper mold that is compatible with the lower mold. The upper mold and the lower mold cooperate to form a closed mold cavity and complete the melt distribution.

[0010] Preferably, the lower mold is mounted on the top of the L-shaped bracket by bolts, and the opposite sides of the two L-shaped brackets are respectively fitted with the left and right sides of the inner wall of the U-shaped frame to improve the stability of the overall frame.

[0011] Preferably, the left and right sides of the movable plate are respectively fitted with the opposite side surfaces of the two L-shaped brackets. The fitting design prevents the movable plate from being offset, thereby ensuring the vertical movement accuracy of the push rod.

[0012] Preferably, a cooling cavity is provided in the lower mold and near the multiple injection molding cavities. The cooling cavity quickly reduces the mold temperature by circulating coolant to shorten the molding cycle. The left end of the lower mold is provided with a coolant input pipe connected to the cooling cavity. The coolant input pipe is externally connected to a coolant supply device to transport cooling medium to the cooling cavity. The right side of the lower mold is provided with a coolant output pipe connected to the cooling cavity. The coolant output pipe discharges high-temperature coolant to maintain circulation efficiency.

[0013] Preferably, a avoidance opening a is opened on the left side of the U-shaped frame, and the coolant inlet pipe passes through the avoidance opening a. The avoidance opening a provides a passage space for the coolant inlet pipe to prevent pipeline interference.

[0014] Preferably, a avoidance opening b is opened on the right side of the U-shaped frame, and the coolant output pipe passes through the avoidance opening b. The avoidance opening b provides a passage for the coolant output pipe to ensure smooth flow of the pipeline.

[0015] Preferably, the side of the push plate fits with the inner wall of the injection molding cavity. The fitting design avoids melt leakage and ensures smooth ejection. The height of the push rod is greater than the depth of the injection molding cavity. The highly redundant design ensures that the push plate can completely eject the product from the mold cavity.

[0016] Preferably, a main channel is opened in the upper mold, the main channel receives the molten plastic injected by the injection molding machine and guides it to the branch channel, the main channel is connected to multiple branch channels, the branch channels evenly distribute the melt to each injection molding cavity to achieve synchronous filling, and the top of the upper mold is provided with an injection port connected to the main channel.

[0017] Preferably, an electric heating wire is provided in the upper mold near the main flow channel and the branch flow channel, and the electric heating wire maintains the temperature of the melt in the flow channel to prevent blockage caused by melt solidification.

[0018] Preferably, the top of the upper mold is provided with two positioning vertical rods that are symmetrically arranged on the left and right. The top ends of the positioning vertical rods pass through the top of the inner wall of the U-shaped frame to the outside. The positioning vertical rods cooperate with the top of the U-shaped frame to ensure that the upper mold and the lower mold are accurately aligned.

[0019] Compared with the prior art, the beneficial effects of the present invention are:

[0020] 1. The multi-cavity high-speed injection mold structure uses the push plate in the lifting assembly to match the injection molding cavity, and the vertical lifting action driven by the first electric cylinder to ensure uniform force during product demoulding, effectively ensuring smooth product demoulding and facilitating removal by workers.

[0021] 2. The multi-cavity high-speed injection mold structure adopts a cooling cavity circulation system, which quickly removes the heat from the mold cavity through the coolant inlet and outlet pipes, significantly shortening the molding cycle. At the same time, combined with the highly redundant design of the push rod, efficient cooling and rapid ejection are achieved, greatly improving production efficiency and product consistency.

[0022] 3. The multi-cavity high-speed injection mold structure uses electric heating wires to control the constant temperature of the melt flow path, ensuring that the molten plastic is filled evenly and without solidification blockage during the multi-cavity injection molding process, avoiding insufficient filling of the product and improving product quality stability.

[0023] 4. The multi-cavity high-speed injection mold structure utilizes the coordination of the positioning vertical rod and the U-shaped frame, as well as the fitting and limiting design of the movable plate and the L-shaped bracket, to ensure the mold opening and closing positioning accuracy and the verticality of the lifting movement, reduce product collisions or scratches caused by structural deviation, and reduce the scrap rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic diagram of the overall structure of the utility model from a first perspective;

[0025] Figure 2 This is a schematic diagram of the overall structure of the utility model from a second perspective;

[0026] Figure 3 Schematic diagram of the cross-sectional structure of the lower mold in the present invention;

[0027] Figure 4 Schematic diagram of the cross-sectional structure of the upper mold in the present invention;

[0028] In the figure: 100, base; 200, L-shaped bracket; 300, lower mold; 301, injection molding cavity; 302, cooling cavity; 303, coolant inlet pipe; 304, coolant outlet pipe; 400, lifting assembly; 410, first electric cylinder; 420, moving plate; 430, push rod; 440, push plate; 500, U-shaped frame; 501, avoidance a; 502, avoidance b; 600, second electric cylinder; 700, U-shaped connecting plate; 800, upper mold; 801, main channel; 802, branch channel; 810, positioning vertical rod; 900, electric heating wire. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0030] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0031] See also Figures 1-4 , the utility model provides a technical solution:

[0032] A multi-cavity high-speed injection mold structure includes a base 100. Two L-shaped brackets 200 are symmetrically arranged on the top of the base 100. The L-shaped brackets 200 are used to support a lower mold 300 and provide lateral positioning for a U-shaped bracket 500. The tops of the two L-shaped brackets 200 jointly support the lower mold 300. The lower mold 300 is used to define an injection molding cavity 301 and cooperate with a cooling system to accelerate product shaping. The top of the lower mold 300 defines multiple injection molding cavities 301. The injection molding cavity 301 is the core molding area for multi-cavity synchronous injection molding. A lifting assembly 400 is provided on the top of the base 100. The lifting assembly 400 is used to drive a push plate 440 to eject the molded product from the injection molding cavity 301.

[0033] The lifting assembly 400 includes a first electric cylinder 410 installed on the middle part of the top of the base 100 by bolts. The first electric cylinder 410 provides lifting power and controls the lifting stroke through a movable rod. A movable plate 420 is provided at the end of the movable rod of the first electric cylinder 410. The movable plate 420 is used to synchronously drive multiple push rods 430 to move vertically. Multiple push rods 430 are provided on the top of the movable plate 420. The push rods 430 are used to transmit the lifting force to the push plate 440. The top of the push rod 430 passes through the bottom of the lower mold 300 and is located in the injection molding cavity 301. The top of the push rod 430 is provided with a push plate 440. The push plate 440 fits against the inner wall of the injection molding cavity 301 to ensure that the product is evenly stressed when ejected.

[0034] A U-shaped frame 500 is provided on the top of the base 100. The U-shaped frame 500 is used to support the second electric cylinder 600 and provide a guide for the lifting and lowering of the upper mold 800. A second electric cylinder 600 is provided on the top of the U-shaped frame 500. The second electric cylinder 600 drives the upper mold 800 to realize the mold opening and closing action. The movable rod of the second electric cylinder 600 passes through the top of the U-shaped frame 500 and is connected to a U-shaped connecting plate 700. The U-shaped connecting plate 700 provides a pipeline connection space for the injection port of the upper mold 800. The bottom of the U-shaped connecting plate 700 is provided with an upper mold 800 that is compatible with the lower mold 300. The upper mold 800 cooperates with the lower mold 300 to form a closed mold cavity and complete the melt distribution.

[0035] In this embodiment, the lower mold 300 is mounted on the top of the L-shaped bracket 200 by bolts, and the opposite sides of the two L-shaped brackets 200 are respectively fitted with the left and right sides of the inner wall of the U-shaped frame 500 to improve the stability of the overall frame.

[0036] Specifically, the left and right sides of the movable plate 420 are respectively fitted with the opposite sides of the two L-shaped brackets 200 . The fitting design prevents the movable plate 420 from being offset, thereby ensuring the vertical movement accuracy of the push rod 430 .

[0037] Furthermore, a cooling cavity 302 is provided in the lower mold 300 and near the multiple injection molding cavities 301. The cooling cavity 302 quickly reduces the mold temperature by circulating coolant to shorten the molding cycle. A coolant input pipe 303 communicating with the cooling cavity 302 is provided at the left end of the lower mold 300. The coolant input pipe 303 is externally connected to a coolant supply device to transport cooling medium to the cooling cavity 302. A coolant output pipe 304 communicating with the cooling cavity 302 is provided on the right side of the lower mold 300. The coolant output pipe 304 discharges high-temperature coolant to maintain circulation efficiency.

[0038] Furthermore, a clearance opening a501 is opened on the left side of the U-shaped frame 500, and the coolant inlet pipe 303 passes through the clearance opening a501. The clearance opening a501 provides a passage space for the coolant inlet pipe 303 to prevent pipeline interference.

[0039] Furthermore, a bypass opening b502 is opened on the right side of the U-shaped frame 500, and the coolant output pipe 304 passes through the bypass opening b502. The bypass opening b502 provides a passage for the coolant output pipe 304 to ensure smooth flow of the pipeline.

[0040] Furthermore, the side of the push plate 440 fits against the inner wall of the injection molding cavity 301. The fitting design avoids melt leakage and ensures smooth ejection. The height of the push rod 430 is greater than the depth of the injection molding cavity 301. The highly redundant design ensures that the push plate 440 can completely eject the product from the mold cavity.

[0041] Furthermore, a main channel 801 is opened in the upper mold 800, and the main channel 801 receives the molten plastic injected by the injection molding machine and guides it to the branch channel 802. The main channel 801 is connected to multiple branch channels 802, and the branch channels 802 evenly distribute the melt to each injection molding cavity 301 to achieve synchronous filling. The top of the upper mold 800 is provided with an injection port connected to the main channel 801.

[0042] Furthermore, an electric heating wire 900 is provided in the upper mold 800 and near the main flow channel 801 and the branch flow channel 802. The electric heating wire 900 maintains the temperature of the melt in the flow channel to prevent the melt from solidifying and causing blockage.

[0043] Furthermore, two positioning vertical rods 810 are symmetrically arranged on the left and right sides of the top of the upper mold 800. The top of the positioning vertical rod 810 passes through the top of the inner wall of the U-shaped frame 500 to the outside. The positioning vertical rod 810 cooperates with the top of the U-shaped frame 500 to ensure that the upper mold 800 and the lower mold 300 are precisely aligned.

[0044] It should be noted that the first electric cylinder 410, the second electric cylinder 600 and the electric heating wire 900 in the present invention all work with an external power supply and controller, and the components are all universal standard parts or components known to those skilled in the art. The structures and principles thereof can be known to those skilled in the art through technical manuals or through conventional experimental methods. The specific connection means should refer to the above-mentioned working principle to complete the electrical connection in the working sequence between the electrical components, and the detailed connection means are well-known technologies in the art. The above mainly introduces the working principle and process, and no further explanation is given on the electrical control.

[0045] When the multi-cavity high-speed injection mold structure of this embodiment is in use, the second electric cylinder 600 is started to drive the U-shaped connecting plate 700 to drive the upper mold 800 to move downward, so that it is closed with the lower mold 300 to form a closed mold cavity; the injection molding machine injects the molten plastic into the main channel 801 through the injection port on the top of the upper mold 800, and the melt is evenly distributed to multiple injection molding cavities 301 through the branch channel 802. At the same time, the electric heating wire 900 heats the main channel 801 and the branch channel 802 at a constant temperature to prevent the melt from solidifying and clogging; after the injection is completed, the coolant enters the cooling cavity through the coolant inlet pipe 303 302 circulates, quickly absorbing the heat of the lower mold 300 and the injection molding cavity 301, and the high-temperature coolant is discharged through the coolant output pipe 304, shortening the cooling and setting time of the product; after cooling, the second electric cylinder 600 drives the upper mold 800 to reset upward. At this time, the first electric cylinder 410 drives the movable plate 420 to rise vertically, driving the push rod 430 and the push plate 440 to smoothly eject the molded product from the injection molding cavity 301; after the mold is opened, the staff can easily take out the product without the problem of product collision damage, thereby realizing high-speed, efficient and low-loss multi-cavity injection molding production.

[0046] The above shows and describes the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely preferred examples of the present invention and are not intended to limit the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention, and such changes and improvements fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A multi-cavity high-speed injection mold structure, comprising a base (100), characterized in that: The top of the base (100) is provided with two L-shaped brackets (200) arranged in a bilaterally symmetrical manner. The tops of the two L-shaped brackets (200) jointly support a lower mold (300). The top of the lower mold (300) is provided with a plurality of injection molding cavities (301). The top of the base (100) is provided with a lifting assembly (400). The lifting assembly (400) includes a first electric cylinder (410) installed at the middle of the top of the base (100) by bolts. The end of the movable rod of the first electric cylinder (410) is provided with a movable plate (420). The top of the movable plate (420) is provided with A plurality of push rods (430) are provided, wherein the top ends of the push rods (430) pass through the bottom of the lower mold (300) and are located in the injection molding cavity (301); a push plate (440) is provided at the top ends of the push rods (430); a U-shaped frame (500) is provided at the top of the base (100); a second electric cylinder (600) is provided at the top of the U-shaped frame (500); a movable rod of the second electric cylinder (600) passes through the top of the U-shaped frame (500) and is connected to a U-shaped connecting plate (700); and an upper mold (800) adapted to the lower mold (300) is provided at the bottom of the U-shaped connecting plate (700).

2. The multi-cavity high-speed injection mold structure according to claim 1, characterized in that: The lower mold (300) is mounted on the top of the L-shaped bracket (200) by means of bolts, and the opposite side surfaces of the two L-shaped brackets (200) are respectively fitted with the left and right sides of the inner wall of the U-shaped bracket (500).

3. The multi-cavity high-speed injection mold structure according to claim 1, characterized in that: The left and right sides of the movable plate (420) are respectively fitted with the opposite side surfaces of the two L-shaped brackets (200).

4. The multi-cavity high-speed injection mold structure according to claim 1, characterized in that: A cooling cavity (302) is provided in the lower mold (300) and near the plurality of injection molding cavities (301). A cooling liquid inlet pipe (303) communicating with the cooling cavity (302) is provided at the left end of the lower mold (300), and a cooling liquid outlet pipe (304) communicating with the cooling cavity (302) is provided at the right side of the lower mold (300).

5. The multi-cavity high-speed injection mold structure according to claim 4, characterized in that: A relief opening a (501) is provided on the left side of the U-shaped frame (500), and the coolant inlet pipe (303) passes through the relief opening a (501).

6. The multi-cavity high-speed injection mold structure according to claim 4, characterized in that: A avoidance opening b (502) is provided on the right side of the U-shaped frame (500), and the coolant output pipe (304) passes through the avoidance opening b (502).

7. The multi-cavity high-speed injection mold structure according to claim 1, characterized in that: The side surface of the push plate (440) fits against the inner wall of the injection molding cavity (301), and the height of the push rod (430) is greater than the depth of the injection molding cavity (301).

8. The multi-cavity high-speed injection mold structure according to claim 1, characterized in that: A main flow channel (801) is provided in the upper mold (800), and the main flow channel (801) is connected to a plurality of branch flow channels (802). An injection port communicating with the main flow channel (801) is provided at the top of the upper mold (800).

9. The multi-cavity high-speed injection mold structure according to claim 8, characterized in that: An electric heating wire (900) is provided in the upper mold (800) at a position close to the main flow channel (801) and the branch flow channel (802).

10. The multi-cavity high-speed injection mold structure according to claim 1, characterized in that: Two positioning vertical rods (810) are provided on the top of the upper mold (800) and are arranged symmetrically on both sides. The top ends of the positioning vertical rods (810) pass through the top of the inner wall of the U-shaped frame (500) to the outside.

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