Inner cooling structure of slender mold core on plastic mold
By setting a coaxial water inlet and drainage chamber on the core seat, and using filter elements and pressure regulators in the water inlet runner, the problem of poor cooling of the slender core is solved, efficient cooling is achieved and the molding cycle is shortened, and production efficiency is improved.
Patent Information
- Application Number
- CN202510455342.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-11
- Publication Date
- 2025-07-29
AI Technical Summary
In the prior art, the internal cooling pipeline of the elongated core is difficult to process, resulting in poor carbonization of the rubber at the end of the core and the cooling time is too long, which affects the mold forming cycle and production efficiency.
A coaxial water inlet and drainage chamber are provided on the core base, and a filter element and a pressure regulator are provided in the inlet runner. By purifying and pressurizing the coolant, the flow rate and heat exchange efficiency of the coolant in the cooling tube are improved and the return speed is slowed down.
It improves the cooling effect of the core, shortens the cooling time, reduces the core extraction time after molding, and improves production efficiency.
Smart Images
Figure CN120382582A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of plastic molds, and particularly to an internal cooling structure of a slender core on a plastic mold. Background Art
[0002] Currently, most of the internal cooling pipelines on plastic molds are produced through 3D printing modeling. However, for some narrow and long areas, such as the inside of a slender core, due to the very limited operating space, it is difficult to meet the processing conditions of 3D printing. Therefore, either no internal cooling pipeline is provided on such a core, or only a small section of internal cooling pipeline is provided at its relatively large starting end. As a result, the rubber material at the end of the core is easily carbonized due to high temperature, and in order to prevent the core from sticking and pulling the plastic part when withdrawing from the plastic part, resulting in damage and deformation of the plastic part, it is necessary to extend the cooling time of the plastic part on the mold, which leads to an extended molding cycle of the plastic mold, difficult improvement of production efficiency, and difficult reduction of the defective rate. Summary of the Invention
[0003] Aiming at the problems existing in the above-mentioned prior art, the present invention provides an internal cooling structure of a slender core on a plastic mold, which can increase the flow rate of the coolant in the slender cooling pipe, thereby increasing the volume of the coolant entering the cooling area per unit time. In combination with the relatively small ratio of the outer diameter of the cooling pipe to the inner diameter of the core, it can appropriately slow down the reflux speed of the coolant, improve the heat exchange efficiency, maximize the cooling effect on the core from the inside, shorten the core cooling time, reduce the time from molding to safe core pulling of the plastic mold, shorten the molding cycle of the plastic mold, and improve its production efficiency.
[0004] To solve the above technical problems, a technical solution adopted by the present invention is as follows:
[0005] An internal cooling structure of a slender core on a plastic mold, an installation block is provided on the plastic mold, a core is provided on the installation block, the core is a narrow and long structure and one end of it passes through the fixing block and extends to its outside; wherein:
[0006] The installation block is fixedly arranged on a core seat, a drainage cavity and a water inlet cavity which are communicated with each other are sequentially arranged on one axial side of the core on the core seat, the water inlet cavity is communicated with a water inlet pipeline, the drainage cavity is communicated with a drainage pipeline, and both the drainage pipeline and the water inlet pipeline pass through the core seat and extend to its end face and then are communicated with the cooling water path of the mold;
[0007] The core is a hollow structure with one end closed, and a cooling pipe is installed inside it. One end of the cooling pipe extends to the side of the inner wall end of the core, and the other end passes through the core and the drainage cavity and then extends into the water inlet cavity. The drainage cavity is hermetically connected to the end of the core; the coolant can flow into the water inlet cavity through the water inlet pipeline and enter the cavity of the core through the cooling pipe, exchange heat with the core, then enter the drainage cavity and flow out from the drainage pipeline.
[0008] As a further elaboration of the above technical solution:
[0009] In the above technical solution, a pressure regulating member is further provided at one end of the water inlet cavity, and a mounting hole groove adapted to the pressure regulating member and communicating with the water inlet cavity is provided on the core seat.
[0010] In the above technical solution, a filter element is further provided on the water inlet pipeline.
[0011] In the above technical solution, the water inlet cavity, the water drainage cavity, the core and the cooling pipe are all coaxially arranged, and the inner diameter of the water inlet cavity is larger than the inner diameter of the water drainage cavity. One end of the water inlet cavity and one end of the water drainage cavity respectively extend to two opposite side walls of the core seat.
[0012] In the above technical solution, the cooling pipe includes a pipe portion and a positioning portion sleeved on one end thereof. The pipe portion passes through the positioning portion and the water drainage cavity and extends into the core. The ratio of its outer diameter to the inner diameter of the core is less than or equal to 2:3. The positioning portion is an annular structure and is screwed on the inner wall of the water inlet cavity.
[0013] In the above technical solution, the positioning portion is a frustum structure and an external thread is formed on its side wall, and an internal thread adapted to it is formed on the inner wall of the water inlet cavity.
[0014] In the above technical solution, a sealing ring is embedded around one end of the core on the mounting block, and the other end of the sealing ring extends to the core seat and is connected to the water drainage cavity.
[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: By providing a coaxially arranged water inlet cavity and a water drainage cavity on the core seat for fixing the core, and providing a filter element and a pressure regulating member in the water inlet flow path, the flow rate of the coolant in the slender cooling pipe can be increased by purifying and pressurizing the coolant, so as to increase the volume of the coolant entering the cooling area per unit time. Combined with the relatively small ratio of the outer diameter of the cooling pipe to the inner diameter of the core, the reflux speed of the coolant can be appropriately reduced, the heat exchange efficiency can be improved, the cooling effect on the core from the inside can be maximally enhanced, the core cooling time can be shortened, the time from the molding of the plastic mold to the safe core pulling can be reduced, the molding cycle of the plastic mold can be shortened, and its production efficiency can be improved. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 is a schematic structural diagram of this embodiment;
[0017] Figure 2 is a schematic structural diagram of the cooling process of this embodiment;
[0018] Figure 3It is a schematic cross-sectional structure diagram of this embodiment;
[0019] Figure 4 is Figure 2 an enlarged schematic diagram of part A in
[0020] Figure 5 It is a schematic cross-sectional structure diagram of the cooling pipe in this embodiment.
[0021] In the figure: 10, mounting block; 20, core; 30, core seat; 40, drainage cavity; 50, water inlet cavity; 60, cooling pipe; 61, pipe part; 62, sealing part; 70, pressure regulating part; 80, filter element; 90, sealing ring; 31, water inlet pipeline; 32, drainage pipeline; 33, mounting hole groove; 34, slideway; 61, pipe part; 62, sealing part; 1, water inlet area; 2, cooling area; 3, external thread; d, outer diameter of the pipe part; D, inner diameter of the core; a, taper angle. Specific embodiments
[0022] The present invention will be further described in detail below with reference to the accompanying drawings.
[0023] The embodiments described with reference to the accompanying drawings are exemplary and are intended to explain the present application, and should not be construed as limiting the present application. In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present application. In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present application, the meanings of "several" and "multiple" are two or more, unless otherwise specifically and clearly defined. In the present application, unless otherwise clearly specified and defined, the terms "mounted", "connected", "connected to", "fixed", etc. should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application may be understood according to specific circumstances. In the present application, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features between them. Moreover, the first feature being "above", "over" and "on top of" the second feature includes that the first feature is directly above and obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "beneath" and "underneath" the second feature includes that the first feature is directly below and obliquely below the second feature, or merely indicates that the horizontal height of the first feature is lower than that of the second feature.
[0024] As Figures 1-3 shown, for the internal cooling structure of the slender core on the mold, an installation block 10 is provided on the mold, a core 20 is provided on the installation block 10, the core 20 is a long and narrow structure and one end of it passes through the fixing block 10 and extends to its outside; wherein:
[0025] The mounting block 10 is fixedly arranged on a core seat 30. On the core seat 30, a drainage cavity 40 and a water inlet cavity 50 which are connected to each other are successively arranged on one axial side of the core 20. The water inlet cavity 50 is communicated with a water inlet pipeline 31, and the drainage cavity 40 is communicated with a drainage pipeline 32. Both the drainage pipeline 32 and the water inlet pipeline 31 pass through the core seat 30 and extend to its end face and then are communicated with the cooling water path of the mold.
[0026] The core 20 is a hollow structure with one end closed. A cooling pipe 60 is installed therein. One end of the cooling pipe 60 extends to the side of the inner wall end of the core 20, and the other end passes through the core 20 and the drainage cavity 40 and then extends into the water inlet cavity 50. The drainage cavity 40 is hermetically connected to the end of the core 20. The coolant can flow into the water inlet cavity 50 through the water inlet pipeline 31, enter the cavity of the core 20 through the cooling pipe 60, exchange heat with the core 20, enter the drainage cavity 40 and flow out from the drainage pipeline 32.
[0027] In this embodiment, a slideway 34 capable of cooperating with the mold is further arranged on the core seat 30, so as to smoothly push the core seat 30 to slide by external force during the processes of mold closing and mold opening, driving the core 20 to enter or be withdrawn from the mold cavity.
[0028] Furthermore, a pressure regulating member 70 is arranged at one end of the water inlet cavity 50. An installation hole groove 33 which is adapted to the pressure regulating member 70 and communicated with the water inlet cavity 50 is arranged on the core seat 30. A filter element 80 is also arranged on the water inlet pipeline 31.
[0029] It can be understood that as Figure 4 shown, since both the core 20 and the cooling pipe 60 are slender structures, the cross-sectional areas of the water inlet area 1 and the cooling area 2 for heat exchange are very small. The filter element 80 can filter out particulate matter in the coolant to prevent it from blocking the water inlet area 1 or the cooling area 2. The pressure regulating member 70 can accelerate the flow of the coolant by pressurizing, further preventing the accumulation of unfiltered particulate matter in the coolant from blocking the flow channel. On the other hand, the pressure regulating member 70 can also prevent the coolant from flowing back or permeating out of the water inlet cavity 50, and has the function of sealing the water inlet cavity 50. Both the pressure regulating member 70 and the filter element 80 belong to the prior art and there are products with different size specifications available in the market. The specific structures and installation methods thereof are not elaborated herein.
[0030] As Figures 2-3, as shown in Fig. 5, the water inlet chamber 50, the drain chamber 40, the core 20 and the cooling pipe 60 are all coaxially arranged, and the inner diameter of the water inlet chamber 50 is larger than that of the drain chamber 40. One end of the water inlet chamber 50 and one end of the drain chamber 40 respectively extend to two opposite side walls of the core seat 30. The cooling pipe 60 includes a pipe portion 61 and a positioning portion 62 sleeved on one end thereof. The pipe portion 61 passes through the positioning portion 62 and the drain chamber 40 and extends into the core 20. The ratio of the outer diameter d of the pipe portion to the inner diameter D of the core is less than or equal to 2:3. The positioning portion 62 is an annular structure and is screwed on the inner wall of the water inlet chamber 50; the positioning portion 62 is a frustum structure and an external thread 3 is formed on its side wall, and an internal thread adapted thereto is formed on the inner wall of the water inlet chamber 50. In this embodiment, a taper angle a of 2° is formed on the side wall of the positioning portion 62.
[0031] It can be understood that a smaller d / D ratio can form a larger volume of the cooling area 2, thereby reducing the reflux speed of the coolant and improving the heat exchange efficiency; however, too small a d value not only makes processing difficult but also reduces the speed and flow rate of the coolant entering the cavity. Therefore, the present invention applies a pressure regulating member 70 to pressurize the coolant and applies a filter element 80 to filter and purify the coolant. The three work together to maximize the cooling effect on the core 20 from the inside, shorten the core cooling time, reduce the time from molding to safe core pulling of the plastic mold, shorten the molding cycle of the plastic mold, and improve its production efficiency.
[0032] As Figure 1 shown, a sealing ring 90 is embedded around one end of the core 20 on the mounting block 10, and the other end of the sealing ring 90 extends to the core seat 30 and is connected to the drain chamber 40. During operation, the sealing ring 90 can seal the connection between the mounting block 10 and the core seat 30 to prevent the reflux coolant from leaking out.
[0033] During assembly, first fix the core 20 on the mounting block 10, install the sealing ring 90 at the end of the drain chamber 40 on the core seat 30, and then fixedly match the mounting block 10 on the core seat; after completion, insert the cooling pipe 60 from the mounting hole groove 33, with its pipe portion 61 extending into the core 20, and rotate the positioning portion 62 to fix it on the inner wall of the water inlet chamber 50 and abut against the drain chamber 40. Finally, install the pressure regulating member 70 and the filter element 80, connect the water inlet pipeline 31 and the drain pipeline 32 to the water cooling pipeline of the mold, and install the core seat 30 on the mold.
[0034] In the present invention, a water inlet cavity 50 and a drainage cavity 40 are coaxially arranged on a core seat 30 of a fixed core 20, and a filter element 80 and a pressure regulating member 70 are arranged in a water inlet flow channel 31. The flow rate of the coolant in the slender cooling tube 60 can be increased by purifying and pressurizing the coolant, so as to increase the volume of the coolant entering the cooling area 2 per unit time. In cooperation with the relatively small ratio of the outer diameter d of the cooling tube to the inner diameter D of the core, the reflux speed of the coolant can be appropriately reduced, the heat exchange efficiency can be improved, the cooling effect on the core 20 from the inside can be maximally enhanced, the core cooling time can be shortened, the time from the molding of the plastic mold to the safe core pulling can be reduced, the molding cycle of the plastic mold can be shortened, and its production efficiency can be improved.
[0035] The above does not impose any limitation on the technical scope of the present invention. Any modification, equivalent change and modification made to the above embodiments based on the technical essence of the present invention still fall within the scope of the technical solution of the present invention.
Claims
1. Internal cooling structure of a slender core on a mold. An installation block is provided on the mold, and a core is provided on the installation block. The core is of a long and narrow structure, and one end of it passes through the fixed block and extends to its outside. It is characterized in that: The installation block is fixedly arranged on a core seat. A drainage cavity and a water inlet cavity that are communicated with each other are successively arranged on one axial side of the core on the core seat. The water inlet cavity is communicated with a water inlet pipeline, and the drainage cavity is communicated with a drainage pipeline. Both the drainage pipeline and the water inlet pipeline pass through the core seat and extend to its end face and then are communicated with the cooling water path of the mold. The core is a hollow structure with one end closed. A cooling pipe is installed inside it. One end of the cooling pipe extends to the side of the inner wall end of the core, and the other end passes through the core and the drainage cavity and then extends into the water inlet cavity. The drainage cavity is hermetically connected to the end of the core. The coolant can flow into the water inlet cavity through the water inlet pipeline, enter the cavity of the core through the cooling pipe, exchange heat with the core, then enter the drainage cavity and flow out from the drainage pipeline.
2. The internal cooling structure of the slender core on the mold according to claim 1, characterized in that, A pressure regulating member is further provided at one end of the water inlet cavity. An installation hole groove that is adapted to the pressure regulating member and communicated with the water inlet cavity is provided on the core seat.
3. The internal cooling structure of the slender core on the mold according to claim 1, characterized in that, A filter element is further provided on the water inlet pipeline.
4. The internal cooling structure of the slender core on the plastic mold according to any one of claims 1-3, characterized in that The water inlet cavity, the drainage cavity, the core and the cooling pipe are all coaxially arranged, and the inner diameter of the water inlet cavity is larger than the inner diameter of the drainage cavity. One end of the water inlet cavity and one end of the drainage cavity respectively extend to two opposite side walls of the core seat.
5. The internal cooling structure of the slender core on the mold according to claim 4, characterized in that, The cooling pipe includes a pipe portion and a positioning portion sleeved on one end of it. The pipe portion passes through the positioning portion and the drainage cavity and extends into the core. The ratio of its outer diameter to the inner diameter of the core is less than or equal to 2:
3. The positioning portion is of an annular structure and is screwed on the inner wall of the water inlet cavity.
6. The internal cooling structure of the slender core on the mold according to claim 5, characterized in that The positioning portion is of a frustum structure and an external thread is formed on its side wall. An internal thread adapted to it is formed on the inner wall of the water inlet cavity.
7. The internal cooling structure of the slender core on the mold according to claim 4, characterized in that, A sealing ring is embedded around one end of the core on the installation block. The other end of the sealing ring extends to the core seat and is connected to the drainage cavity.