Cold runner injection mold

Abstract

The utility model relates to a cold runner injection mold. The cold runner injection mold comprises a cooling groove drum, a first mold and a second mold, the cooling groove drum comprises a liquid storage drum, a sealing plate is fixedly arranged at a drum opening of the liquid storage drum, an extension pipe is arranged on the outer wall of the liquid storage drum, and one end of the extension pipe penetrates through the sealing plate; the first mold comprises an outer frame. The utility model relates to the technical field of injection molds. According to the cold runner injection mold, the cooling groove drum is inserted into the first mold body, cooling liquid is poured into the cooling groove drum in advance, and when the first mold body and the second mold body are closed to form a closed mold cavity, extrusion is conducted between the first mold body and the cooling groove drum, so that the cooling liquid in the cooling groove drum flows into the two mold bodies; and the effect that the cooling liquid synchronously cools all the parts of the mold so as to improve the uniformity of the mold during cooling is achieved.

Description

Technical Field

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

[0002] Injection molds are tools for producing plastic products; they are also tools that give plastic products a complete structure and precise dimensions. Injection molding is a processing method used in mass production of certain parts with complex shapes. Specifically, it refers to the process of injecting heated and melted plastic into the mold cavity under high pressure by an injection molding machine, and then cooling and solidifying to obtain a molded product.

[0003] Chinese patent publication number CN216578990U discloses a universal injection mold with a cold runner, comprising a bottom plate and support columns fixed at four corners of the top of the bottom plate, a top plate fixed between the top ends of the four support columns, an injection upper mold fixed to the bottom of the top plate through an electric telescopic rod, an injection lower mold fixed to the top of the bottom plate, an injection cavity is provided at the bottom of the injection upper mold and the top of the injection lower mold, and an injection tube penetrating to the top of the top plate is connected to the top of the injection upper mold;

[0004] In the above patent, by setting up a water circulation heat conduction mechanism, it is convenient to use the flow of water to carry away the heat on the injection mold, thereby accelerating the cooling efficiency of the product and further accelerating the production efficiency.

[0005] However, the water will continuously absorb heat during the flow, resulting in a large temperature difference between the water at both ends of the conduit. Therefore, the cooling method through water flow is prone to uneven cooling, which in turn may cause product deformation during demolding. Utility Model Content

[0006] According to the deficiencies in the prior art, the purpose of the present invention is to provide a cold runner injection mold so as to solve the technical problems mentioned in the above background technology.

[0007] The above technical objectives of the utility model are achieved through the following technical solutions:

[0008] A cold runner injection mold comprises a cooling groove barrel, a first mold and a second mold;

[0009] The cooling tank cylinder comprises a liquid storage cylinder, a sealing plate is fixedly arranged at the cylinder mouth of the liquid storage cylinder, an extension tube is arranged on the outer wall of the liquid storage cylinder, and one end of the extension tube passes through the sealing plate;

[0010] The first mold includes an outer frame, a first mold frame is arranged inside the outer frame, and a plurality of guide pipes are arranged on the outer frame wall of the first mold frame;

[0011] The second mold includes a connecting shell, a second mold frame is arranged inside the connecting shell, a plurality of positioning tubes are arranged on the outer frame wall of the second mold frame, a pressure plate is arranged inside the connecting shell, and the pressure plate is sleeved on the outer surface of the second mold frame.

[0012] Furthermore, the first mold frame is inserted into the interior of the liquid storage barrel, and the outer surface of the first mold frame fits with the inner wall of the liquid storage barrel, and the position of the guide tube corresponds to the position where the extension tube passes through the sealing plate.

[0013] Furthermore, the pressure plate is slidably connected to the second mold frame, and pressure springs connected to the connecting shell are arranged at four convenient places on one side of the pressure plate, and a blocking tube inserted into the positioning tube is arranged on the side of the pressure plate away from the pressure spring.

[0014] Further, the sealing plate is inserted between the first mold frame and the outer frame.

[0015] Furthermore, a high-pressure joint is provided at one end of the guide tube, a low-pressure joint is slidably provided inside the positioning tube, and the high-pressure joint and the low-pressure joint can be connected to each other to form a hydraulic quick joint.

[0016] Furthermore, a fixing frame is disposed at the top of the outer frame, a sliding frame is disposed at the top of the connecting shell, and a sliding plate inserted into the sliding frame is fixedly disposed on one side of the fixing frame.

[0017] In summary, the present invention includes at least one of the following beneficial technical effects:

[0018] 1. A cold runner injection mold, inserting a cooling groove barrel into the interior of a first mold, and pre-infusing the interior of the cooling groove barrel with a coolant, when the first mold and the second mold are closed to form a closed mold cavity, squeezing is performed between the first mold and the cooling groove barrel, so that the coolant inside the cooling groove barrel flows to the interiors of the two molds, so that the coolant is used to cool various parts of the mold synchronously, so as to improve the uniformity of the mold during cooling;

[0019] 2. This cold runner injection mold, through the setting of the pressure spring, when the coolant is squeezed through the positioning tube into the position between the second mold frame and the connecting shell, it will push the pressure plate and squeeze the pressure spring. It is used to reset the pressure plate through the compressed pressure spring when the first mold and the second mold are separated from each other, so as to push the coolant to flow back and push the coolant into the cooling groove drum. Since the cooling groove drum is exposed to the outside, the heat of the coolant can be quickly dissipated into the air, so as to achieve the effect of reusing the coolant, and can effectively avoid the problem of the coolant staying in the first mold and the second mold causing the temperature of the mold body to rise. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for describing the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0021] Figure 1 The utility model is a schematic structural diagram of a cold runner injection mold.

[0022] Figure 2 The utility model is a schematic structural diagram of a cooling groove barrel of a cold runner injection mold.

[0023] Figure 3 The utility model is a schematic structural diagram of a first mold of a cold runner injection mold.

[0024] Figure 4 It is a structural schematic diagram of a second mold of a cold runner injection mold of the utility model.

[0025] Figure 5 The utility model is a schematic diagram of the coolant movement trajectory of a cold runner injection mold.

[0026] In the figure, 1. cooling trough cylinder; 11. liquid storage cylinder; 12. sealing plate; 13. extension tube; 2. first mold; 21. outer frame; 22. first mold frame; 23. guide tube; 24. high-pressure connector; 25. low-pressure connector; 3. second mold; 31. second mold frame; 32. positioning tube; 33. pressure plate; 34. pressure spring; 35. blocking tube; 36. connecting shell; 4. fixed frame; 5. sliding frame; 6. sliding plate. DETAILED DESCRIPTION

[0027] The utility model is further described in detail below in conjunction with the accompanying drawings.

[0028] Example:

[0029] Reference Figure 1-Figure 1 -5, a cold runner injection mold disclosed in the utility model comprises a cooling groove barrel 1, a first mold 2 and a second mold 3;

[0030] The cooling tank 1 includes a liquid storage cylinder 11, a sealing plate 12 is fixedly arranged at the cylinder mouth of the liquid storage cylinder 11, an extension tube 13 is arranged on the outer wall of the liquid storage cylinder 11, and one end of the extension tube 13 passes through the sealing plate 12;

[0031] The first mold 2 includes an outer frame 21, a first mold frame 2 is arranged inside the outer frame 21, and a plurality of guide tubes 23 are arranged on the outer frame wall of the first mold frame 2;

[0032] The second mold 3 includes a connecting shell 36, a second mold 3 frame is arranged inside the connecting shell 36, a plurality of positioning tubes 32 are arranged on the outer frame wall of the second mold 3 frame, a pressure plate 33 is arranged inside the connecting shell 36, and the pressure plate 33 is sleeved on the outer surface of the second mold 3 frame.

[0033] In this embodiment, as shown in the figure, the bottom ends of the first mold 2 and the second mold 3 are provided with a guide plate, one end of the guide plate is fixedly connected to the cooling groove drum 1, and the first mold 2 and the second mold 3 are slidably connected to the guide plate. Figure 5 , insert the cooling groove drum 1 into the interior of the first mold 2, and pre-infuse the interior of the cooling groove drum 1 with coolant. When the first mold 2 and the second mold 3 are closed to form a closed mold cavity, squeeze the space between the first mold 2 and the cooling groove drum 1 to make the coolant inside the cooling groove drum 1 flow to the interiors of the two molds, so as to achieve the effect of cooling all parts of the mold synchronously with the coolant, so as to improve the uniformity of the mold during cooling. Figure 5 F in the middle is the flow trajectory of the coolant;

[0034] Specifically, the first mold 2 and the cooling groove cylinder 1 are connected to each other, and the sealing plate 12 is inserted into the position between the outer frame 21 and the frame of the first mold 2, so that the frame wall of the first mold 2 and the cylinder wall of the liquid storage cylinder 11 form a closed cavity, and the outside world is connected to the closed cavity through the setting of the extension tube 13 and the guide tube 23. When the second mold 3 and the first mold 2 are pushed to close each other, the guide tube 23 will be inserted into the interior of the positioning tube 32. When the first mold 2 and the second mold 3 are pressed against each other, the first mold 2 will be pushed by the second mold 3 to close the liquid storage cylinder 11. The internal coolant is squeezed so that the coolant is discharged along the extended tube to the inside of the guide tube 23. Since the guide tube 23 is inserted into the inside of the positioning tube 32, the coolant will enter the inside of the second mold 3 and be stored inside the second mold 3, and will push the pressure plate 33 to move. At this time, the coolant fills the inside of the first mold 2 and the second mold 3. When the material is injected, the internal product can be quickly cooled by the coolant filled in the temples of the first mold 2 and the second mold 3, thereby improving the efficiency of product solidification and improving production efficiency.

[0035] In a further preferred embodiment of the present invention, Figure 1-5 As shown, the first mold 2 frame is inserted into the interior of the liquid storage cylinder 11, and the outer surface of the first mold 2 frame fits the inner wall of the liquid storage cylinder 11, and the position of the guide tube 23 corresponds to the position where the extension tube 13 passes through the sealing plate 12.

[0036] In this embodiment, since the outer surface of the first mold 2 is in contact with the inner wall of the liquid storage cylinder 11, the oil inside the liquid storage cylinder 11 can only be discharged through the extension tube 13 after being squeezed, thereby avoiding leakage.

[0037] In a further preferred embodiment of the present invention, Figure 1-5 As shown, the pressure plate 33 is slidably connected to the second mold frame 3, and pressure springs 34 connected to the connecting shell 36 are arranged at four convenient places on one side of the pressure plate 33, and a blocking tube 35 inserted into the positioning tube 32 is arranged on the side of the pressure plate 33 away from the pressure spring 34.

[0038] In this embodiment, through the setting of the pressure spring 34, when the coolant is squeezed through the positioning tube 32 and enters the position between the second mold 3 frame and the connecting shell 36, it will push the pressure plate 33 and squeeze the pressure spring 34. When the first mold 2 and the second mold 3 are separated from each other, the pressure plate 33 is reset by the compressed pressure spring 34, and the coolant is pushed back to achieve the effect of pushing the coolant into the cooling groove drum 1.

[0039] In a further preferred embodiment of the present invention, Figure 1-5As shown, the sealing plate 12 is inserted between the first mold frame 2 and the outer frame 21 .

[0040] In this embodiment, the sealing plate 12 is inserted between the outer frame 21 and the frame of the first mold 2 , so that the frame wall of the first mold 2 and the cylinder wall of the liquid storage cylinder 11 form a closed cavity.

[0041] In a further preferred embodiment of the present invention, Figure 1-5 As shown, a high-pressure joint 24 is provided at one end of the guide tube 23, and a low-pressure joint 25 is slidably provided inside the positioning tube 32. The high-pressure joint 24 and the low-pressure joint 25 can be connected to each other to form a hydraulic quick joint.

[0042] In this embodiment, by setting the high-pressure connector 24 and the low-pressure connector 25, after the guide tube 23 is inserted into the interior of the positioning tube 32, the high-pressure connector 24 and the low-pressure connector 25 can be quickly connected to each other to form a passage to avoid the problem of outflow of the coolant.

[0043] In a further preferred embodiment of the present invention, Figure 1-5 As shown, a fixing frame 4 is disposed at the top of the outer frame 21 , a sliding frame 5 is disposed at the top of the connecting shell 36 , and a sliding plate 6 inserted into the sliding frame 5 is fixedly disposed on one side of the fixing frame 4 .

[0044] In this embodiment, the fixed frame 4 is used to install the sliding plate 6, and the sliding plate 6 and the sliding frame 5 are used to guide the outer frame 21, thereby achieving the effect of improving the stability of the mold.

[0045] The embodiments of this specific implementation method are all preferred embodiments of the utility model, and are not intended to limit the protection scope of the utility model. Therefore, all equivalent changes made based on the structure, shape, and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A cold runner injection mold, characterized in that: It comprises a cooling groove drum (1), a first mold (2) and a second mold (3); The cooling tank drum (1) comprises a liquid storage drum (11), a sealing plate (12) is fixedly arranged at the mouth of the liquid storage drum (11), an extension tube (13) is arranged on the outer wall of the liquid storage drum (11), and one end of the extension tube (13) passes through the sealing plate (12); The first mold (2) comprises an outer frame (21), a first mold frame (22) is arranged inside the outer frame (21), and a plurality of guide tubes (23) are arranged on the outer frame wall of the first mold frame (22); The second mold (3) comprises a connecting shell (36), a second mold (3) frame is arranged inside the connecting shell (36), a plurality of positioning tubes (32) are arranged on the outer frame wall of the second mold (3) frame, a pressure plate (33) is arranged inside the connecting shell (36), and the pressure plate (33) is sleeved on the outer surface of the second mold (3) frame.

2. A cold runner injection mold according to claim 1, characterized in that: The first mold frame (22) is inserted into the interior of the liquid storage cylinder (11), and the outer surface of the first mold frame (22) fits the inner wall of the liquid storage cylinder (11), and the position of the guide tube (23) corresponds to the position of the extension tube (13) passing through the sealing plate (12).

3. A cold runner injection mold according to claim 2, characterized in that: The pressure plate (33) is slidably connected to the frame of the second mold (3), and pressure springs (34) connected to the connecting shell (36) are arranged at four convenient locations on one side of the pressure plate (33), and a blocking tube (35) inserted into the interior of the positioning tube (32) is arranged on the side of the pressure plate (33) away from the pressure spring (34).

4. A cold runner injection mold according to claim 3, characterized in that: The sealing plate (12) is inserted between the first mold frame (22) and the outer frame (21).

5. A cold runner injection mold according to claim 4, characterized in that: A high-pressure joint (24) is provided at one end of the flow guide tube (23), and a low-pressure joint (25) is slidably provided inside the positioning tube (32). The high-pressure joint (24) and the low-pressure joint (25) can be connected to each other to form a hydraulic quick joint.

6. A cold runner injection mold according to claim 5, characterized in that: A fixing frame (4) is arranged at the top of the outer frame (21), a sliding frame (5) is arranged at the top of the connecting shell (36), and a sliding plate (6) inserted into the sliding frame (5) is fixedly arranged on one side of the fixing frame (4).

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