Plastic injection mold convenient for temperature control

Abstract

The utility model discloses a plastic injection mold convenient for temperature control, and belongs to the technical field of injection molds. A plastic injection mold convenient to control temperature comprises a base, a lower mold base is arranged on the base, an upper mold base is arranged at the top of the lower mold base, a hydraulic oil cylinder is arranged between the upper mold base and the base, a forming cavity is defined by the upper mold base and the lower mold base, and a liquid cooling pipeline is arranged in the lower mold base; a liquid inlet pipe and a liquid outlet pipe are arranged at the two ends, arranged on the liquid cooling pipeline, of the lower die base respectively, a water pump is arranged on the liquid inlet pipe, a condenser is arranged between the liquid inlet pipe and the liquid outlet pipe, and a cooling mechanism is arranged between the condenser and the liquid outlet pipe. According to the utility model, the cooling speed of an injection molding product can be controlled, the injection molding product in the molding cavity of the lower mold base can be quickly cooled, cooling liquid in the liquid cooling pipeline can be quickly refrigerated and reflowed, the injection molding product in the molding cavity can be quickly cooled, and the injection molding production efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of injection molds, in particular to a plastic injection mold which is convenient for temperature control. Background Art

[0002] Molds are various molds and tools used in industrial production to obtain the desired products by injection molding, blow molding, extrusion, die casting or forging molding, smelting, stamping and other methods. In short, molds are tools used to make molded objects. This tool is composed of various parts, and different molds are composed of different parts. It mainly realizes the processing of the shape of the object by changing the physical state of the molded material. It is known as the "mother of industry".

[0003] The existing injection molds are not convenient for rapid demoulding in the later stage. Since the hot melt temperature of the injected plastic is high, the overall temperature is high, the cooling and temperature control efficiency is low, and the cooling process cannot be achieved quickly. Therefore, demoulding is inconvenient in daily production and production efficiency cannot be improved. Utility Model Content

[0004] The utility model aims to solve the problems existing in the prior art and proposes a plastic injection mold which is convenient for temperature control.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A plastic injection mold that is easy to control temperature, includes a base, a lower mold base is arranged on the base, an upper mold base is arranged on the top of the lower mold base, a hydraulic cylinder is arranged between the upper mold base and the base, the upper mold base and the lower mold base are combined to form a molding cavity, a liquid cooling pipe is arranged in the lower mold base, the lower mold base is placed on both ends of the liquid cooling pipe and are respectively provided with a liquid inlet pipe and a liquid outlet pipe, a water pump is arranged on the liquid inlet pipe, a condenser is arranged between the liquid inlet pipe and the liquid outlet pipe, and a cooling mechanism is arranged between the condenser and the liquid outlet pipe.

[0007] Preferably, the cooling mechanism includes a water trough fixed on the base and having an opening on the top thereof, a first water pipe is provided at one end of the liquid outlet pipe away from the liquid cooling pipe, there is a height difference between the bottom of the first water pipe and the top of the water trough, and a second water pipe is provided between the water trough and the condenser.

[0008] Preferably, a guide plate is obliquely provided on the inner wall of the water tank, and evenly distributed water holes are provided on the guide plate.

[0009] Preferably, a rotating rod is fixedly provided on the inner wall of the water tank, and blades evenly distributed in a circumference are provided on the rotating rod, and the rotating rod is placed at the bottom end of the guide plate.

[0010] Preferably, the liquid cooling pipe, the first water pipe and the second water pipe are all provided with heat dissipation fins.

[0011] Preferably, the liquid cooling pipe, the first water pipe and the second water pipe are all made of copper material.

[0012] Preferably, a plurality of accommodating grooves are provided in the lower mold base, transparent tubes are provided in the accommodating grooves, scale lines are provided on the transparent tubes, and thermal expansion liquid is stored in the transparent tubes.

[0013] Compared with the prior art, the utility model provides a plastic injection mold that is easy to control temperature and has the following beneficial effects:

[0014] 1. The plastic injection mold which is easy to control temperature has a cooling mechanism, so that the cooling water with a higher temperature contacts with the air over a large area for heat exchange, thereby increasing the cooling speed of the cooling water, and then the cooling water quickly cools the injection molded product in the molding cavity, so that the injection molded product is quickly cooled and demolded, thereby improving the injection molding production efficiency.

[0015] 2. The plastic injection mold which is easy to control temperature, through the impact of flowing cooling water on the blades, makes the blades drive the rotating rod to rotate, and the rotating rod drives other blades to rotate to the bottom end of the guide plate and is impacted by the water flow, so that the rotating blades accelerate the air flow around the side and accelerate the cooling speed of the cooling water.

[0016] 3. The plastic injection mold that is easy to control temperature has a transparent tube arranged in the lower mold base, and there is a heat expansion liquid in the transparent tube. By observing the expansion degree of the heat expansion liquid, the staff can understand the temperature change of the injection molded product in the molding cavity, and the staff can demold the plastic product as soon as it is cooled, which greatly increases the accuracy of the demolding operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the utility model;

[0018] Figure 2 For the utility model Figure 1 The main view of

[0019] Figure 3 It is a schematic diagram of the cross-sectional structure of the water tank of the utility model;

[0020] Figure 4 It is a partial structural schematic diagram of the liquid cooling pipeline of the utility model;

[0021] Figure 5 It is a schematic diagram of the cross-sectional structure of the lower die base of the utility model.

[0022] In the figure: 1. base; 101. hydraulic cylinder; 2. lower die base; 3. upper die base; 4. liquid cooling pipe; 401. liquid inlet pipe; 402. liquid outlet pipe; 5. water pump; 6. condenser; 7. water tank; 701. first water pipe; 702. second water pipe; 8. guide plate; 801. drain hole; 9. rotating rod; 901. blade; 10. heat dissipation fin; 11. receiving groove; 111. transparent tube; 12. molding cavity. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model; it is obvious that the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments, and all other embodiments obtained by ordinary technicians in this field based on the embodiments of the utility model without making creative work are within the scope of protection of the utility model.

[0024] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top / bottom" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the 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 position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0025] In the description of the present invention, it should be noted that, unless otherwise clearly stipulated and limited, the terms "installed", "provided with", "sleeved / connected", "connected", etc. should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two components; for ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0026] Example: Refer to Figure 1-5 A plastic injection mold that is easy to control temperature includes a base 1, a lower mold base 2 is arranged on the base 1, an upper mold base 3 is arranged on the top of the lower mold base 2, a hydraulic cylinder 101 is arranged between the upper mold base 3 and the base 1, the upper mold base 3 and the lower mold base 2 are surrounded by a molding cavity 12, a liquid cooling pipe 4 is arranged in the lower mold base 2, and the lower mold base 2 is placed on both ends of the liquid cooling pipe 4, and a liquid inlet pipe 401 and a liquid outlet pipe 402 are respectively arranged, a water pump 5 is arranged on the liquid inlet pipe 401, a condenser 6 is arranged between the liquid inlet pipe 401 and the liquid outlet pipe 402, and a cooling mechanism is arranged between the condenser 6 and the liquid outlet pipe 402.

[0027] Specifically, when the injection mold is working, the hydraulic cylinder 101 drives the upper mold base 3 to move, so that the upper mold base 3 and the lower mold base 2 are fitted to form an injection molding cavity 12, and then the injection molding product is formed by injecting raw materials into the molding cavity 12. By controlling the operation of the water pump 5, the cooling water flows in the liquid cooling pipe 4 to cool the injection molding product in the molding cavity 12. The heated cooling water is discharged through the liquid outlet pipe 402, and enters the condenser 6 for rapid cooling after preliminary cooling by the cooling mechanism. Under the action of the water pump 5, the cooling water flows back to the liquid cooling pipe 4, thereby controlling the cooling speed of the injection molding product in the molding cavity 12, so that the cooling water quickly cools the injection molding product in the molding cavity 12, and the injection molding product is quickly cooled and demolded, thereby improving the injection molding production efficiency.

[0028] Reference Figure 1-3 As a preferred technical solution of the utility model, the cooling mechanism includes a water tank 7 fixed on the base 1 and having an opening on the top thereof, a first water pipe 701 is arranged at one end of the liquid outlet pipe 402 away from the liquid cooling pipe 4, there is a height difference between the bottom of the first water pipe 701 and the top of the water tank 7, and a second water pipe 702 is arranged between the water tank 7 and the condenser 6.

[0029] Furthermore, a guide plate 8 is obliquely provided on the inner wall of the water tank 7 , and evenly distributed water drop holes 801 are opened on the guide plate 8 .

[0030] Specifically, the cooling water heated by heat exchange in the liquid cooling pipe 4 is discharged from the liquid outlet pipe 402. The cooling water discharged from the liquid outlet pipe 402 flows out of the pipe and contacts with the air for heat exchange during the falling process. The falling cooling water falls on the guide plate 8, and part of the water falls in a linear form through the water drop hole 801, further increasing the contact area between the water and the air, allowing the cooling water with a higher temperature to contact with the air for heat exchange, causing the cooling water to cool down naturally during the flow process, thereby increasing the cooling speed of the cooling water, and then allowing the cooling water to quickly cool the injection molded product in the molding cavity 12, so that the injection molded product can be quickly cooled and demolded, thereby improving the injection molding production efficiency.

[0031] Reference Figure 3 As a preferred technical solution of the utility model, a rotating rod 9 is fixedly provided on the inner wall of the water tank 7 , and blades 901 evenly distributed in a circumference are provided on the rotating rod 9 , and the rotating rod 9 is placed at the bottom end of the guide plate 8 .

[0032] Specifically, the cooling water flowing on the guide plate 8 impacts the blade 901, causing the blade 901 to drive the rotating rod 9 to rotate, and the rotating rod 9 drives other blades 901 to rotate to the bottom end of the guide plate 8 and be impacted by the water flow, so that the rotating blade 901 accelerates the air flow on the surrounding side, thereby accelerating the cooling speed of the cooling water.

[0033] Reference Figure 4As a preferred technical solution of the present utility model, heat dissipation fins 10 are provided on the liquid cooling pipe 4 , the first water pipe 701 and the second water pipe 702 .

[0034] Furthermore, the liquid cooling pipe 4, the first water pipe 701 and the second water pipe 702 are all made of copper.

[0035] Specifically, by arranging heat dissipation fins 10 in the liquid cooling pipe 4, the first water pipe 701 and the second water pipe 702, the cooling water is naturally cooled when flowing in the pipe, and the copper material is used to further accelerate the heat dissipation effect when the cooling water flows.

[0036] Reference Figure 5 As a preferred technical solution of the utility model, a plurality of receiving grooves 11 are opened in the lower mold base 2, and a transparent tube 111 is arranged in the receiving groove 11. The transparent tube 111 is provided with scale lines, and the transparent tube 111 stores thermal expansion liquid.

[0037] Specifically, the wall between one end of the receiving groove 11 and the inner wall of the molding cavity 12 is thin, so that one end of the transparent tube 111 can directly transmit the real-time temperature of the injection molded product in the molding cavity 12. There is a thermal expansion liquid in the transparent tube 111. By observing the expansion degree of the thermal expansion liquid, it is convenient for the staff to understand the temperature change of the injection molded product in the molding cavity 12, and it is convenient for the staff to demold the plastic product as soon as it is cooled down, avoiding demolding of the injection molded product when the temperature has not cooled down or has already cooled down, which greatly increases the accuracy of the demolding operation.

[0038] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A plastic injection mold that is easy to control temperature, comprising a base (1), characterized in that: A lower die seat (2) is arranged on the base (1), an upper die seat (3) is arranged on the top of the lower die seat (2), a hydraulic cylinder (101) is arranged between the upper die seat (3) and the base (1), the upper die seat (3) and the lower die seat (2) together form a molding cavity (12), a liquid cooling pipe (4) is arranged in the lower die seat (2), a liquid inlet pipe (401) and a liquid outlet pipe (402) are arranged at both ends of the lower die seat (2) placed on the liquid cooling pipe (4), a water pump (5) is arranged on the liquid inlet pipe (401), a condenser (6) is arranged between the liquid inlet pipe (401) and the liquid outlet pipe (402), and a cooling mechanism is arranged between the condenser (6) and the liquid outlet pipe (402).

2. A plastic injection mold that is easy to control temperature according to claim 1, characterized in that: The cooling mechanism comprises a water tank (7) fixed on the base (1) and having an opening on the top thereof; a first water pipe (701) is arranged at one end of the liquid outlet pipe (402) away from the liquid cooling pipe (4); there is a height difference between the bottom of the first water pipe (701) and the top of the water tank (7); and a second water pipe (702) is arranged between the water tank (7) and the condenser (6).

3. A plastic injection mold that is easy to control temperature according to claim 2, characterized in that: A guide plate (8) is obliquely arranged on the inner wall of the water tank (7), and evenly distributed water drop holes (801) are provided on the guide plate (8).

4. A plastic injection mold that is easy to control temperature according to claim 3, characterized in that: A rotating rod (9) is fixedly provided on the inner wall of the water tank (7), and blades (901) are evenly distributed in a circumference on the rotating rod (9). The rotating rod (9) is placed at the bottom end of the guide plate (8).

5. A plastic injection mold that is easy to control temperature according to claim 4, characterized in that: The liquid cooling pipe (4), the first water pipe (701) and the second water pipe (702) are all provided with heat dissipation fins (10).

6. A plastic injection mold that is easy to control temperature according to claim 5, characterized in that: The liquid cooling pipe (4), the first water pipe (701) and the second water pipe (702) are all made of copper material.

7. A plastic injection mold that is easy to control temperature according to claim 1, characterized in that: A plurality of receiving grooves (11) are provided in the lower mold base (2), a transparent tube (111) is provided in the receiving groove (11), a scale line is provided on the transparent tube (111), and a thermal expansion liquid is stored in the transparent tube (111).

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