Injection mold and cooling air channel structure thereof
By introducing a cooling airway structure into the injection mold and local cooling is used to cool the cooling problem of poor cooling in larger parts of the injection molded parts, efficient cooling and preventing shrinkage are achieved, the quality of the injection molded parts is improved and the service life of the mold is extended.
Patent Information
- Application Number
- CN202422381997.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-29
- Publication Date
- 2025-08-01
- Estimated Expiration
- 2034-09-29
AI Technical Summary
The existing injection molds have poor cooling in areas with larger wall thicknesses, resulting in shrinkage of injection molded parts, and water cooling methods are prone to water leakage and corrosion.
The cooling airway structure is adopted, and the detachable ventilation insert is connected through the intake unit and the exhaust unit to form a gas cooling channel between the fixed template and the moving template, and local cooling gas is used to cool it to avoid shrinkage.
Effectively cool the local injection molded parts, prevent shrinkage, improve the quality of injection molded parts, avoid water leakage and corrosion, and extend the service life of the mold.
Smart Images
Figure CN223173510U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of injection molds, and particularly relates to an injection mold and a cooling air duct structure thereof. Background Art
[0002] An injection mold is mainly composed of a moving template and a fixed template. When an injection molded part is injection molded, it is necessary to ensure that the temperature of each position of the injection molded part in the mold core of the injection mold is balanced within a certain range. If there is a part with a relatively large wall thickness in the injection molded part, in the case of no cooling or poor cooling, the temperature here is likely to be too high, resulting in shrinkage of the injection molded part at the part with a relatively large wall thickness. Therefore, most injection molds use water cooling to cool the injection mold, that is, cooling water channels are opened around or in the cavity of the injection mold, and the heat is carried away by circulating water. However, the parting surface between the fixed template and the moving template cannot be equipped with a cooling water pipe, and abnormal situations such as water leakage are also likely to occur in the mold core. Content of the Utility Model
[0003] For this reason, to solve the above problems, the utility model provides an injection mold and a cooling air duct structure thereof, which can perform gas cooling on the local part of an injection molded part with a relatively large wall thickness.
[0004] To achieve the above object, the technical solution provided by the utility model is as follows:
[0005] The utility model provides a cooling air duct structure of an injection mold, including a fixed template and a moving template, and further including a cooling mechanism for cooling the local part of the injection molded part in the mold core; the cooling mechanism includes an air inlet unit and an air outlet unit, the air inlet unit is arranged on the fixed template, and the air outlet unit is arranged on the moving template; a first insert hole for communicating with the air inlet unit is opened in the fixed mold core of the fixed template, a second insert hole for communicating with the air outlet unit is opened in the moving mold core of the moving template, a detachable ventilation insert is connected between the first insert hole and the second insert hole, the ventilation insert has thermal conductivity and is used to lead the cooling gas in the air inlet unit to the air outlet unit, and when the cooling gas passes through the fixed mold core and the moving mold core, heat exchange is formed among the cooling gas, the ventilation insert and the injection molded part, so as to form a cooling setting for the local part of the injection molded part in the mold core.
[0006] Further, the installation position of the ventilation insert corresponds to the shrinkage area of the injection molded part in the mold core.
[0007] Further, the first insert hole and the second insert hole are respectively adjacent to the shrinkage area of the injection molded part in the mold core.
[0008] Furthermore, the number of the ventilation inserts, the first insert holes and the second insert holes is multiple; the air inlet unit includes an air inlet main pipe and a plurality of secondary air channels arranged in the fixed mold core, a gas guiding channel for respectively communicating the plurality of secondary air channels is arranged in the side wall of the fixed mold core facing away from its cavity, the air inlet of the air inlet main pipe is arranged on the side wall of the fixed mold plate, the air outlet of the air inlet main pipe communicates with the gas guiding channel, and the plurality of secondary air channels are respectively communicated with the corresponding first insert holes; the air outlet unit includes a plurality of air outlet channels matching the secondary air channels, the air outlet channels are arranged on the movable mold plate, and the plurality of air outlet channels are respectively communicated with the corresponding second insert holes.
[0009] The present utility model provides an injection mold, at least including the cooling air channel structure of the above injection mold.
[0010] Through the technical solution provided by the present utility model, the following beneficial effects are achieved:
[0011] By leading the cooling gas in the air inlet unit to the air outlet unit through the first insert hole, the ventilation insert and the second insert hole, so that the cooling gas passes through the fixed mold core and the movable mold core, and locally cools the injection molded part in the mold core effectively. In this way, the local gas cooling of the injection molded part with a larger wall thickness can be carried out to avoid the shrinkage phenomenon, and further ensure the good quality of the injection molded part.
[0012] In addition, the ventilation insert can be arranged on the parting surface between the fixed mold plate and the movable mold plate, there is no risk of water leakage in the mold core, and the cooling air channel is not easy to be corroded and has a long service life. Description of the Drawings
[0013] Figure 1 Shown is the external view of the cooling air channel structure of the injection mold in Embodiment 1;
[0014] Figure 2 Shown is the cross-sectional view of the cooling air channel structure of the injection mold in Embodiment 1;
[0015] Figure 3 Shown is Figure 2 the enlarged schematic view of Area A in
[0016] Figure 4 Shown is Figure 2 the enlarged schematic view of Area B in Detailed Description of the Embodiment
[0017] To further illustrate each embodiment, the present utility model provides accompanying drawings. These drawings are a part of the disclosure of the present utility model, mainly used to illustrate the embodiments, and can cooperate with the relevant descriptions in the specification to explain the operating principle of the embodiments. With reference to these contents, those of ordinary skill in the art should be able to understand other possible implementation manners and the advantages of the present utility model. The components in the drawings are not drawn to scale, and similar component symbols are usually used to represent similar components.
[0018] Now, the present utility model will be further described in conjunction with the accompanying drawings and specific implementation manners.
[0019] Embodiment 1
[0020] Referring to Figures 1 to 4 As shown, Embodiment 1 provides a cooling air duct structure for an injection mold (hereinafter simply referred to as the cooling air duct structure) for cooling a locally overheated area of an injection molded part in the injection mold.
[0021] The cooling air duct structure of this embodiment includes a fixed mold plate 1 and a movable mold plate 2, and further includes a cooling mechanism for cooling a part of the injection molded part in the mold core. The cooling mechanism includes an air inlet unit 12 and an air outlet unit 22. The air inlet unit 12 is arranged on the fixed mold plate 1, and the air outlet unit 22 is arranged on the movable mold plate 2. The fixed mold core 11 of the fixed mold plate 1 is provided with a first insert hole 111 for communicating with the air inlet unit 12, and the movable mold core 21 of the movable mold plate 2 is provided with a second insert hole 211 for communicating with the air outlet unit 22. A detachable ventilation insert 3 is connected between the first insert hole 111 and the second insert hole 211. The ventilation insert 3 has thermal conductivity and is used to conduct the cooling gas in the air inlet unit 12 to the air outlet unit 22. When the cooling gas passes through the fixed mold core 11 and the movable mold core 21, a heat exchange is formed among the cooling gas, the ventilation insert 3 and the injection molded part, so as to form a cooling setting for a part of the injection molded part in the mold core. Among them, the fixed mold core 11 and the movable mold core 21 together form the mold core of the injection fixture after being clamped.
[0022] In this embodiment, specifically, the ventilation insert 3 is a steel sheet insert to ensure sufficient thermal conductivity.
[0023] The installation position of the ventilation insert 3 corresponds to the shrinkage area of the injection molded part in the mold core, and the first insert hole 111 and the second insert hole 211 are respectively adjacent to the shrinkage area of the injection molded part in the mold core, so as to ensure that the ventilation insert 3 can form a more effective heat transfer with a part of the injection molded part with a larger wall thickness adjacent thereto, and quickly transfer the heat of the shrinkage area of the injection molded part to the cooling gas, thereby further accelerating the cooling speed.
[0024] When the injection molded part is injected into the injection mold, the air inlet unit 12 is connected to compressed air as a source of cooling gas. The use cost of compressed air is low and it is also easy to obtain materials. The compressed air delivered from the air inlet unit 12 then passes through the first insert hole 111, the vent insert 3 and the second insert hole 211 in sequence, and is finally discharged from the injection molding jig through the air outlet unit 22. At the same time, the vent insert 3 exchanges heat with the injection molded part in the mold core, and then the heat in the mold core is taken away by the cooling gas, thereby forming a complete cooling air channel.
[0025] By passing the cooling gas in the air inlet unit 12 to the air outlet unit 22 through the first insert hole 111, the ventilation insert 3 and the second insert hole 211, the cooling gas passes through the fixed mold core 11 and the movable mold core 21, so as to effectively cool the injection molded parts in the mold core. In this way, the injection molded parts with larger wall thickness can be locally cooled by gas to avoid shrinkage, thereby ensuring the good quality of the injection molded parts.
[0026] In addition, the ventilation insert 3 can be arranged on the parting surface between the fixed template 1 and the movable template 2, and there is no risk of water leakage in the mold core. Moreover, the cooling air duct is not easy to corrode and has a long service life.
[0027] More specifically, Figure 3 and Figure 4 As shown, the number of the vent insert 3, the first insert hole 111 and the second insert hole 211 is two, the air intake unit 12 includes an air intake main pipe 121 and two secondary air channels 123 arranged in the fixed mold core 11, and the outer side wall of the fixed mold core 11 away from its cavity is provided with an air guide channel 122 for respectively connecting the two secondary air channels 123, the air inlet 124 of the air intake main pipe 121 is provided on the side wall of the fixed mold plate 1, and the air outlet of the air intake main pipe 121 is connected to the air guide channel 122, the two secondary air channels 123 are connected one by one to the corresponding first insert holes 111, and the air outlet unit 22 includes two air outlet channels 221 that cooperate with the secondary air channels 123, the air outlet channels 221 are provided on the movable mold plate 2, and the two air outlet channels 221 are connected one by one to the corresponding second insert holes 211.
[0028] In this specific embodiment, the air inlet main pipe 121, the air guide channel 122, the two secondary air ducts 123 and the first insert hole 111 constitute the fixed template air inlet duct in the fixed template 1, the two second insert holes 211 and the air outlet duct 221 constitute the movable template air outlet duct in the movable template 2, and the fixed template air inlet duct is connected to the movable template air outlet duct through the corresponding ventilation insert 3 to form a complete cooling air duct.
[0029] By arranging an air intake main pipe 121 with a diameter of 6 mm in the fixed mold plate 1, Figure 1The intake port 124 shown is opened on the side wall of the fixed mold plate 1 to facilitate external connection of compressed air and lead it to the outer side wall of the fixed mold core 11. Meanwhile, a gas guiding channel 122 is machined inside the outer side wall of the fixed mold core 11. The air outlet of the intake main pipe 121 is connected to the middle of the gas guiding channel 122, and the two ends of the gas guiding channel 122 are respectively communicated with two secondary air channels 123. The two secondary air channels 123 respectively pass through the cavity wall of the fixed mold core 11, and then are communicated with the corresponding first insert holes 111 on the cavity wall of the fixed mold core 11. Then, through the corresponding ventilation inserts 3, they are respectively communicated with two second insert holes 211 on the cavity wall of the moving mold core 21. Then, the two air outlet channels 221 in the moving mold core 21 are connected to the corresponding second insert holes 211 to divide into two independent gas cooling paths. In this way, the gas after heat exchange can be led outside the injection mold to quickly take away the heat of the injection molded part, that is, the cooling action is completed.
[0030] Of course, in other embodiments, the set numbers of the ventilation inserts 3, the first insert holes 111, the second insert holes 211, the intake main pipe 121, the secondary air channels 123, and the air outlet channels 221 are not limited to this, and are determined according to the structures of the injection mold and the injection molded part.
[0031] In addition, the cooling air channel structure of this embodiment can also be added on the basis of the cooling structure formed by the existing cooling water method to form a water-air mixed cooling method. That is, on the basis of mostly using the waterway for cooling, for local areas with relatively thick wall thickness or areas at risk of shrinkage, when the waterway cannot reach, through digital simulation analysis software, the cooling air channel structure of this embodiment is added at the corresponding local positions of the injection mold, and each relevant cooling parameter is adjusted to the optimal state through simulation. Then, the injection mold is designed according to the optimal cooling parameters set by the digital simulation analysis software. In this way, it is possible to avoid repeated trial molding and mold repair, quickly achieve the required cooling effect, and produce high-quality products, so as to quickly meet the emergency needs of customers.
[0032] Embodiment 2
[0033] Embodiment 2 provides an injection mold, which at least includes the cooling air channel structure of the injection mold in Embodiment 1.
[0034] Although the present invention is specifically shown and described in combination with the preferred implementation embodiments, those skilled in the art should understand that various changes can be made to the present invention in terms of form and details without departing from the spirit and scope of the present invention defined by the appended claims, and all of them are within the protection scope of the present invention.
Claims
1. A cooling air channel structure of an injection mold, comprising a fixed mold plate and a movable mold plate, characterized in that: Also included is a cooling mechanism for cooling a portion of the injection molded part within the mold core; The cooling mechanism includes an air inlet unit and an air outlet unit, wherein the air inlet unit is arranged on the fixed platen and the air outlet unit is arranged on the movable platen; The fixed mold core of the fixed mold plate is provided with a first insert hole for connecting to the air inlet unit, and the movable mold core of the movable mold plate is provided with a second insert hole for connecting to the air outlet unit. A detachable ventilation insert is connected between the first insert hole and the second insert hole. The ventilation insert has thermal conductivity and is used to pass the cooling gas in the air inlet unit to the air outlet unit. When the cooling gas passes through the fixed mold core and the movable mold core, heat exchange is formed between the cooling gas, the ventilation insert and the injection molded part, so as to form a local cooling setting for the injection molded part in the mold core.
2. The cooling air duct structure of the injection mold according to claim 1, characterized in that: The installation position of the vent insert corresponds to the shrinkage area of the injection molded part in the mold core.
3. The cooling air duct structure of the injection mold according to claim 2, wherein: The first insert hole and the second insert hole are respectively adjacent to the shrinkage area of the injection molded part in the mold core.
4. The cooling air duct structure of the injection mold according to any one of claims 1-3, characterized in that: The number of the ventilation insert, the first insert hole and the second insert hole is multiple; the air intake unit includes an air intake main pipe and a plurality of secondary air ducts arranged in the fixed mold core, and the side wall of the fixed mold core facing away from its cavity is provided with air guide channels for respectively connecting the plurality of secondary air ducts, the air inlet of the air intake main pipe is provided on the side wall of the fixed mold plate, the air outlet of the air intake main pipe is connected to the air guide channel, and the plurality of secondary air ducts are connected one by one to the corresponding first insert holes; the air outlet unit includes a plurality of air outlet channels cooperating with the secondary air ducts, the air outlet channels are provided on the movable mold plate, and the plurality of air outlet channels are connected one by one to the corresponding second insert holes.
5. An injection mold, characterized in that: The cooling air channel structure of the injection mold at least comprises the cooling air channel structure of any one of claims 1-4.