Plastic product mold

Abstract

The utility model relates to the technical field of injection molds, in particular to a plastic product mold which comprises a first mold assembly, a second mold assembly, a cooling unit, a mold ejection system, a first fixing plate and a second fixing plate, one side of the first mold assembly is installed on the first fixing plate, and the other side of the first mold assembly is provided with two first model areas; the second mold assembly is provided with two second model areas, and a cavity of a workpiece is formed when the first mold assembly and the second mold assembly are assembled; the cooling unit is embedded in the two mold assemblies; the mold ejection system is arranged on the connecting plate, and the other end of the mold ejection system is in contact with the inner surface of the second model area; a liquid inlet is formed in the second fixing plate and connected with a liquid injection system, and the other end of the liquid injection system communicates with the second model area. According to the utility model, the layout and arrangement of the cooling units are improved, so that the cooling effect is better; and the liquid injection system is optimized, so that uniform injected liquid flow can be ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of injection molds, in particular to a plastic product mold. Background Art

[0002] An injection mold is a tool used to produce plastic products and give them their complete structure and precise dimensions. Specifically, hot melt plastic is injected into the mold cavity, where it cools to produce the finished product. Injection molds typically consist of a movable mold and a fixed mold. The movable mold is mounted on the injection molding machine's movable platen, while the fixed mold is mounted on the injection molding machine's fixed platen. During injection molding, the movable and fixed molds combine to form the gating system and the mold cavity. When the mold is opened, the movable and fixed molds separate, and the product is separated from the mold by an ejection mechanism.

[0003] However, the cooling system of existing plastic product molds suffers from uneven cooling, resulting in low cooling efficiency and uneven heat distribution, which affects the quality of the finished product and the production cycle. The injection system also suffers from uneven injection and high flow resistance, which leads to defects such as short shots, air holes or incomplete filling during the injection molding process, affecting the overall performance and appearance of the product. Utility Model Content

[0004] In view of this, the utility model addresses the deficiencies of the existing technology and proposes a device for plastic product molds, which provides efficient and uniform cooling effects on the workpiece by improving the layout and setting of the cooling unit; and ensures a more uniform injection flow by optimizing the layout of the injection system.

[0005] The utility model provides a plastic product mold, which is characterized by comprising:

[0006] a first mold assembly, wherein one side of the first mold assembly is mounted on a first fixed plate and an opposite side is provided with two first mold areas;

[0007] a second mold assembly, wherein the surface of the second mold assembly is provided with two second model areas, and when the first mold assembly and the second mold assembly are closed, the first model areas and the second model areas form a mold cavity of the workpiece;

[0008] a cooling unit, wherein the cooling unit is embedded in the first mold assembly and the second mold assembly;

[0009] a mold ejection system, wherein the mold ejection system is disposed on the connecting plate, and the other end of the mold ejection system contacts the inner surface of the second mold area;

[0010] A second fixed plate is provided with a liquid inlet, a liquid injection system is installed between the second fixed plate and the connecting plate, the liquid inlet is connected to one end of the liquid injection system, and the other end of the liquid injection system is connected to the second model area.

[0011] In some embodiments of the present application, the first mold assembly includes a first template and a first mold core, the first mold core is embedded in the first template, and the first mold core is provided with the first model area; the second mold assembly includes a second template and a second mold core, the second mold core is embedded in the second template, and the second mold core is provided with the second model area; the second model area and the first model area are complementary in shape, the first template and the second template are connected by a telescopic rod, and the first template can move with the extension and retraction of the telescopic rod.

[0012] In some embodiments of the present application, the cooling unit includes a first cooling system and a second cooling system, the first cooling system is embedded in the first mold core, and the second cooling system is embedded in the second mold core;

[0013] There are two groups of the first cooling system, which are respectively arranged in the two first model areas; there are two groups of the second cooling system, which are respectively arranged in the two second model areas.

[0014] In some embodiments of the present application, each group of the first cooling system is provided with three cooling oil circuits, and the inlets and outlets of the three cooling oil circuits are embedded on the same side of the first template; each group of the second cooling system includes four cooling water circuits, and the inlets and outlets of the four cooling water circuits are embedded on the same side of the second template.

[0015] In some embodiments of the present application, two symmetrical groups of third cooling water channels are embedded in the first template, and the water inlet and outlet of the third cooling water channels are arranged on opposite sides of the first template.

[0016] In some embodiments of the present application, two U-shaped protective plates are arranged between the second fixed plate and the connecting plate, the injection system is arranged in the two U-shaped protective plates, and a control system is arranged on the outside of the U-shaped protective plates, and the control system is electrically connected to the injection system.

[0017] In some embodiments of the present application, the injection system includes an injection cavity and two injection pipes, one end of the injection cavity is connected to the liquid inlet, and the other end is connected to the two injection pipes, and the two injection pipes are respectively connected to the two second model areas.

[0018] In some embodiments of the present application, the mold ejection system includes an ejector base plate, an ejector panel, and two ejector plates. The two ejector plates are installed on the connecting plate. A number of ejectors are respectively provided on the two ejector plates. One end of the ejector passes through the ejector base plate and the ejector panel in sequence and is flush with the inner surface of the second mold core.

[0019] In some embodiments of the present application, a lifting cylinder is provided in the U-shaped protective plate, and the two lifting cylinders are respectively arranged on both sides of the injection system, and the piston end of the lifting cylinder passes through the connecting plate, the ejector base plate and the ejector panel.

[0020] In some embodiments of the present application, a temperature regulating pipe is provided in the U-shaped protective plate, and the water inlet and the water outlet of the temperature regulating pipe are embedded in the same side of the U-shaped protective plate.

[0021] The utility model provides a plastic product mold, by respectively arranging a cooling system on the first mold unit and the second mold unit, the cooling system used by the first mold core is an oil pipeline, and two groups of cooling water channels are also embedded in the first template, and the cooling system used by the second mold core is a water pipeline, which provides the layout and setting of the cooling units and provides a more efficient and uniform cooling effect; by dividing the injection system into two parts, a liquid injection cavity and a liquid injection pipeline, the liquid injection pipeline can quickly inject molten plastic into the mold cavity, ensuring the uniformity and fluidity of the injection; by arranging a temperature control pipeline on the periphery of the liquid injection system, hot water can be injected into the temperature control pipeline during the injection process to ensure that the molten plastic is at a suitable temperature, and cold water can be injected into the temperature control pipeline after the injection is completed to cool the liquid injection system and the lifting cylinders on both sides of the liquid injection system. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 An overall schematic diagram of a plastic product mold provided by an embodiment of the present utility model;

[0023] Figure 2 A schematic diagram of a portion of the structure of a plastic product mold provided by an embodiment of the present utility model;

[0024] Figure 3 A schematic diagram of a portion of the structure of a plastic product mold provided by an embodiment of the present utility model;

[0025] Figure 4 A schematic diagram of a portion of the structure of a plastic product mold provided by an embodiment of the present utility model;

[0026] Figure 5 A schematic diagram of a portion of the structure of a plastic product mold provided by an embodiment of the present utility model;

[0027] Figure 6This is a partial structural schematic diagram of a plastic product mold provided by an embodiment of the present utility model.

[0028] Among them: 100, first mold assembly; 110, first template; 120, first mold core; 130, first model area; 140, first cooling system; 150, third cooling system; 200, second mold assembly; 210, second template; 220, second mold core; 230, second model area; 240, second cooling system; 300, first fixed plate; 400, second fixed plate; 410, liquid inlet; 420, liquid injection system; 421, liquid injection cavity; 430, control system; 500, U-shaped protective plate; 510, temperature control pipe; 600, connecting plate; 610, ejector base plate; 620, ejector panel; 630, ejector plate; 631, ejector; 650, lifting cylinder. DETAILED DESCRIPTION

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

[0030] In the description of this application, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing this application 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 cannot be understood as a limitation on this application.

[0031] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features indicated. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of such features. Throughout this application, unless otherwise specified, "plurality" means two or more.

[0032] In the description of this application, it should be noted that, unless otherwise specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they can refer to fixed, removable, or integral connections; they can refer to sole connections or electrical connections; they can refer to direct connections or indirect connections through an intermediary, or they can refer to internal communication between two components. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances.

[0033] like Figure 1-Figure 3 As shown, the present invention provides a mold for a plastic product, comprising a first mold assembly 100, a second mold assembly 200, a mold ejection system and a liquid injection system 420. One side of the first mold assembly 100 is mounted on a first fixed plate 300, and the opposite side is provided with two first mold areas 130; the second mold assembly 200 is provided with two second mold areas 230 on the side opposite to the first mold assembly 100. The second mold areas 230 and the first mold areas 130 are structurally adapted and complementary in shape, as shown in FIG. Figure 2 and Figure 3 As shown, Figure 2 exist Figure 1 The first mold assembly, the first cooling system and the first fixing plate are removed. Figure 3 A schematic diagram of the first mold assembly and the first fixed plate is shown; the structure of the first model area 130 is concave, and the structure of the second model area 230 is convex. When the first mold assembly 100 and the second mold assembly 200 are molded together, a cavity for forming a workpiece can be formed between the first model area 130 and the second model area 230.

[0034] like Figure 1 、 Figure 5 and Figure 6 As shown, the surface of the second mold area 230 is connected to a mold ejection system, the other end of which is disposed on a connecting plate 600. After the workpiece is cooled and formed, the mold ejection system ejects the workpiece from the second mold area 230. The side of the connecting plate 600 away from the second mold assembly is connected to the second fixed plate 400 via a U-shaped protective plate 500. The second fixed plate 400 is provided with a liquid inlet. A liquid injection system 420 is installed within the U-shaped protective plate 500. The liquid inlet 410 is connected to one end of the liquid injection system 420, and the other end of the liquid injection system 420 passes through the connecting plate 600 and is connected to the second mold area 230. The molten plastic flows through the liquid inlet 410 into the liquid injection system 420 and then into the cavity formed by the second mold area 230 and the first mold area 130. After the molten plastic cools, it forms a workpiece.

[0035] The four corners of the first mold assembly and the second mold assembly 200 are respectively connected by telescopic rods. The first mold assembly 100 and the first fixed plate 300 can move with the extension and retraction of the telescopic rods. When the telescopic rods retract, the upper mold assembly and the lower mold assembly are closed. When the telescopic rods extend, the upper mold assembly and the lower mold assembly are separated.

[0036] Specifically, the first mold assembly 100 includes a first template 110 and a first mold core 120, the first mold core 120 is embedded in the first template 110, and the first model area 130 is arranged in the first mold core 120; the second mold assembly 200 includes a second template 210 and a second mold core 220, the second mold core 220 is embedded in the second template 210, and the second model area 230 is arranged in the second mold core 220; the telescopic rod is arranged between the first template 110 and the second template 210, and when the first template 110 can move with the extension and retraction of the telescopic rod, the first mold core 120 and the first model area 130 also move with the first template 110.

[0037] In some embodiments of the present application, cooling units are embedded inside the upper mold assembly and the lower mold assembly. After injection molding, the cooling units take away heat during the solidification process of the molten plastic in the mold cavity, allowing the product to quickly cool and shape.

[0038] Specifically, if Figure 4 As shown, the cooling unit is embedded in the first mold assembly 100 and the second mold assembly 200. The cooling unit includes a first cooling system 140 and a second cooling system 240. The first cooling system 140 is embedded in the first mold core 120, and the second cooling system 240 is embedded in the second mold core 220. Two groups of first cooling systems 140 are provided, and the two groups of first cooling systems 140 are respectively arranged corresponding to the two first mold areas 130. Each group of first cooling systems 140 includes three cooling oil circuits. The inlets and outlets of the three cooling oil circuits are embedded on the same side of the first mold plate 110. The inlets and outlets of the two groups of first cooling systems 140 are arranged on opposite sides of the first mold plate 110. Two symmetrical groups of third cooling water circuits are also embedded in the first mold plate 110. The water inlets and outlets of the third cooling water circuits are respectively arranged on opposite sides of the first mold plate 110. There are two groups of second cooling systems 240, and the two groups of second cooling systems 240 are respectively arranged corresponding to the two second model areas 230. Each group of second cooling systems 240 includes four cooling water channels, and the inlets and outlets of the four cooling water channels are embedded in the same side of the second template 210. The inlets and outlets of the two groups of second cooling systems 240 are arranged on opposite sides of the second template 210.

[0039] The design of multiple cooling oil and water circuits ensures full contact between the cooling medium (such as cooling oil or cooling water) and the mold surface, thereby accelerating heat transfer and achieving rapid cooling. The cooling system is divided into multiple independent groups, each targeting a model area. Cooling parameters such as flow rate and temperature can be adjusted according to the specific needs of different model areas, thereby improving the flexibility and targetedness of cooling. The distribution design of the cooling oil and water circuits allows heat to be evenly dissipated from the mold surface, helping to maintain temperature consistency among various parts of the workpiece and reduce product defects caused by local overheating.

[0040] In some embodiments of the present application, Figure 1 and Figure 5 As shown, two U-shaped protective plates 500 are positioned opposite each other, and the liquid injection system 420 is disposed within each of the two U-shaped protective plates 500. A control system 430 is disposed outside each of the U-shaped protective plates 500 and is electrically connected to the liquid injection system 420. The liquid injection system 420 includes a liquid injection chamber 421 and two liquid injection pipes. One end of the liquid injection chamber 421 is connected to the liquid inlet, and the other end is connected to the two liquid injection pipes. The two liquid injection pipes are respectively connected to the two second mold areas 230. The connection between the liquid injection chamber 421 and the two second mold areas 230 through the two liquid injection pipes ensures that the molten plastic is quickly and evenly distributed into the two mold cavities, improving the speed and uniformity of plastic filling.

[0041] In some embodiments of the present application, Figure 1 and Figure 5 As shown, the mold ejection system includes an ejector base plate 610, an ejector panel 620, and two ejector plates 630. The two ejector plates 630 are mounted on the connecting plate 600 and are positioned corresponding to the positions of the two second mold areas 230. Each ejector plate 630 is equipped with several ejector pins 631. The other ends of the ejector pins 631 pass through the ejector base plate 610 and the ejector panel 620, respectively, and are flush with the inner surface of the second mold core 220. Two lifting cylinders 650 are installed in the U-shaped protective plate 500. The two lifting cylinders 650 are respectively arranged on either side of the injection system 420. The piston ends of the lifting cylinders 650 pass through the connecting plate 600, the ejector base plate 610, and are connected to the ejector panel 620. After the mold is formed, the lifting cylinder 650 provides thrust to drive the ejector base plate 610 and the ejector panel 620 to move toward the second mold assembly 200, and the ejector 631 also moves with the ejector base plate 610 and the ejector panel 620, thereby ejecting the workpiece from the second mold area 230.

[0042] In some embodiments of the present application, Figure 1 and Figure 6As shown, a temperature-regulating pipe 510 is disposed within the U-shaped protective plate 500 and is positioned around the periphery of the liquid injection system 420 and the lifting cylinder 650. During the injection process, hot water can be injected through the temperature-regulating pipe 510 to maintain the temperature of the molten plastic, helping to maintain the plastic's fluidity and improve the stability of the injection molding process. After the injection is completed, cold water is injected through the temperature-regulating pipe 510 to effectively cool the liquid injection system 420 and the lifting cylinder 650, reducing thermal fatigue caused by high temperatures in these components and thereby extending their service life. The water inlet and outlet of the temperature-regulating pipe 510 are embedded on the same side of the U-shaped protective plate 500, simplifying the layout and connection of the cooling water circuit.

[0043] In summary, the present embodiment provides a mold for a plastic product, wherein the first mold assembly 100 and the second mold assembly 200 are combined to form two cavities, and the molten plastic enters the liquid injection cavity 421 from the injection molding machine through the liquid inlet 410, and then flows into the two cavities respectively through two liquid injection pipes; after the injection molding is completed, during the solidification process of the molten plastic in the cavity, cooling oil is introduced into the three cooling oil circuits of the first cooling system 140, and cooling water is introduced into the four cooling water circuits of the second cooling system 240 and the third cooling water circuit to cool the workpiece. After cooling, the telescopic rod extends, and the first mold assembly 100 and the first fixed plate 300 move away from the second mold assembly 200. The first mold assembly 100 is separated from the second mold assembly 200. Then, the lifting cylinder 650 drives the ejector panel 620 and the ejector base plate 610 to move toward the second mold assembly 200. The ejector 631 ejects the workpiece from the second mold area 230. After the ejection is completed, the lifting cylinder 650 retracts, and the ejector panel 620, the ejector base plate 610, and the ejector 631 automatically reset to their initial positions. The present invention provides efficient and uniform cooling by improving the layout and setting of the cooling unit. By optimizing the layout of the liquid injection system, it ensures uniform liquid injection flow and improves product quality.

[0044] Obviously, those skilled in the art may make various modifications and variations to the present invention without departing from the spirit and scope of the present invention. Thus, if such modifications and variations fall within the scope of the claims of the present invention and their equivalents, the present invention is intended to include such modifications and variations.

Claims

1. A plastic product mold, characterized in that: include: A first mold assembly (100), wherein one side of the first mold assembly (100) is mounted on a first fixed plate (300), and an opposite side is provided with two first mold areas (130); a second mold assembly (200), wherein the surface of the second mold assembly (200) is provided with two second model areas (230), and when the first mold assembly (100) and the second mold assembly (200) are closed, the first model areas (130) and the second model areas (230) form a mold cavity of a workpiece; a cooling unit, the cooling unit being embedded in the first mold assembly (100) and the second mold assembly (200); a mold ejection system, wherein the mold ejection system is arranged on the connecting plate (600), and the other end of the mold ejection system contacts the inner surface of the second mold area (230); A second fixed plate (400), wherein a liquid inlet (410) is provided on the second fixed plate (400), a liquid injection system (420) is installed between the second fixed plate (400) and the connecting plate (600), the liquid inlet (410) is communicated with one end of the liquid injection system (420), and the other end of the liquid injection system (420) is communicated with the second model area (230); The first mold assembly (100) comprises a first template (110) and a first mold core (120), wherein the first mold core (120) is embedded in the first template (110), and the first mold core (120) is provided with the first model area (130); the second mold assembly (200) comprises a second template (210) and a second mold core (220), wherein the second mold core (220) is embedded in the second template (210), and the second mold core (220) is provided with the second model area (230); the second model area (230) and the first model area (130) are complementary in shape, the first template (110) and the second template (210) are connected by a telescopic rod, and the first template (110) can move as the telescopic rod is extended or retracted; The cooling unit comprises a first cooling system (140) and a second cooling system (240), wherein the first cooling system (140) is embedded in the first mold core (120), and the second cooling system (240) is embedded in the second mold core (220); The first cooling system (140) is provided with two groups, and the two groups of first cooling systems (140) are respectively provided in the two first model areas (130); the second cooling system (240) is provided with two groups, and the two groups of second cooling systems (240) are respectively provided in the two second model areas (230); Each group of the first cooling system (140) is provided with three cooling oil circuits, and the inlets and outlets of the three cooling oil circuits are embedded on the same side of the first template (110); each group of the second cooling system (240) includes four cooling water circuits, and the inlets and outlets of the four cooling water circuits are embedded on the same side of the second template (210); Two symmetrical groups of third cooling water channels are embedded in the first template (110), and the water inlet and outlet of the third cooling water channels are arranged on opposite sides of the first template (110).

2. The plastic product mold according to claim 1, characterized in that: Two U-shaped protective plates (500) are provided between the second fixing plate (400) and the connecting plate (600); the liquid injection system (420) is provided in the two U-shaped protective plates (500); a control system (430) is provided outside the U-shaped protective plates (500); and the control system (430) is electrically connected to the liquid injection system (420).

3. The plastic product mold according to claim 2, characterized in that: The injection system (420) comprises an injection cavity (421) and two injection pipes, one end of the injection cavity (421) is connected to the liquid inlet (410), and the other end is connected to the two injection pipes, and the two injection pipes are respectively connected to the two second model areas (230).

4. The plastic product mold according to claim 2, characterized in that: The mold ejection system includes an ejector base plate (610), an ejector panel (620) and two ejector plates (630). The two ejector plates (630) are installed on the connecting plate (600). A plurality of ejector pins (631) are respectively provided on the two ejector plates (630). One end of the ejector pin (631) passes through the ejector base plate (610) and the ejector panel (620) in sequence and is flush with the inner surface of the second mold core (220).

5. The plastic product mold according to claim 4, characterized in that: A lifting cylinder (650) is provided in the U-shaped protective plate (500), and two lifting cylinders (650) are respectively provided on both sides of the injection system (420), and the piston ends of the lifting cylinders (650) pass through the connecting plate (600), the ejector base plate (610) and are connected to the ejector panel (620).

6. The plastic product mold according to claim 2, characterized in that: A temperature regulating pipe (510) is provided in the U-shaped protective plate (500), and a water inlet and a water outlet of the temperature regulating pipe (510) are embedded on the same side of the U-shaped protective plate (500).

Images