Injection mold assembly and injection mold for TPU (Thermoplastic Polyurethane) material

Abstract

The TPU material injection mold assembly comprises a mold core, a mold core movably installed on the upper portion of the mold core, a sliding mechanism in sliding connection with the mold core, an ejection mechanism fixedly connected with the mold core and a mold core insert movably installed on the lower portion of the mold core, and an installation groove for installing the mold core is formed in the upper surface of the mold core; a through groove for containing the sliding mechanism and an ejector pin groove for containing the ejection mechanism are formed in the groove bottom wall of the installation groove, a product forming groove is defined by the mold core, the mold core and the sliding mechanism, an insert groove for containing a mold core insert is formed in the lower surface of the mold core, the insert groove partially penetrates through the upper surface of the mold core, a runner groove is formed in the mold core in a concave mode, and a glue inlet groove is formed in the mold core insert in a concave mode. A glue inlet channel is defined by the glue inlet groove, the mold core and the mold core, the glue inlet channel is communicated with the forming groove and the runner groove, a glue inlet is formed in the mold core insert in a penetrating mode, the glue inlet is communicated with the glue inlet groove and the forming groove, and the injection mold comprises the injection mold assembly made of the TPU material.

Description

Technical Field

[0001] The utility model relates to the field of injection molding, in particular to an injection mold component and an injection mold made of TPU material. Background Art

[0002] TPU (Thermoplastic Urethane), also known as thermoplastic polyurethane in Chinese, is a mature, environmentally friendly material with exceptional properties of high tension, high tensile strength, toughness, and aging resistance. Currently, TPU is widely used in healthcare, electronics, industry, and sports. Its unmatched strength, toughness, wear resistance, cold resistance, oil resistance, water resistance, aging resistance, and weather resistance are unmatched by other plastic materials. Furthermore, it offers numerous excellent properties, including high water resistance, breathability, windproofing, cold protection, antibacterial and mildew resistance, warmth retention, UV resistance, and energy release.

[0003] TPU can be categorized by processing method into injection molding, extrusion, and blow molding. However, during the injection molding process, due to TPU's unique vacuum adsorption and superior toughness, the molded sprue cannot be automatically separated from the product and mold in existing injection mold structures, resulting in appearance defects when the product is separated from the sprue. Utility Model Content

[0004] In view of this, the purpose of the present invention is to provide an injection mold assembly and an injection mold of TPU material that can automatically separate the product and the nozzle material during the mold opening process.

[0005] In order to achieve the above-mentioned purpose, the utility model provides an injection mold assembly of TPU material, comprising: a mold core, a mold core movably mounted on the upper part of the mold core, a sliding mechanism slidably connected to the mold core, an ejection mechanism fixedly connected to the mold core, and a mold core insert movably mounted on the lower part of the mold core, the upper surface of the mold core is provided with a mounting groove for mounting the mold core, the bottom wall of the mounting groove is penetrated by a through groove for accommodating the sliding mechanism and an ejector pin groove for accommodating the ejection mechanism, the mold core, the mold core and the sliding mechanism together form a molding part of the product. Groove, the lower surface of the mold core is provided with an insert groove for accommodating the mold core insert, at least part of the insert groove passes through the upper surface of the mold core, the upper surface of the mold core is recessed with a runner groove, the upper end of the mold core insert is recessed with a glue inlet groove, the glue inlet groove and the mold core and the mold core together form a glue inlet channel, the two ends of the glue inlet channel are respectively connected with the molding groove and the runner groove, the mold core insert is penetrated by a glue inlet at the connection between the glue inlet channel and the molding groove, the two ends of the glue inlet are respectively connected with the glue inlet groove and the molding groove,

[0006] When the injection mold assembly of the TPU material is injection molding, the molten TPU material is injected into the glue inlet channel through the runner groove, and enters the molding groove through the glue inlet to form a product; when the injection mold assembly of the TPU material is opened, the mold core insert moves downward to separate the molding groove from the glue inlet, and the product in the molding groove is separated from the glue inlet channel and the sprue material in the glue inlet, and the ejection mechanism drives the mold core to eject the product upward.

[0007] Furthermore, at least a portion of the glue inlet is gradually contracted from the glue inlet groove toward the molding groove.

[0008] Furthermore, the extended length of the glue inlet is less than or equal to 5 mm.

[0009] Furthermore, a sliding groove for accommodating the sliding mechanism is formed through the mold core.

[0010] Furthermore, the sliding mechanism is fixedly mounted on the mold core, and a supporting pin for supporting the sliding mechanism is mounted at the lower end of the sliding mechanism.

[0011] Furthermore, the mold insert is provided with an ejector hole along the vertical direction, and the ejector hole is connected to the glue inlet groove. The injection mold assembly of the TPU material also includes a straight ejector, and the straight ejector is arranged in the ejector hole. When the product is ejected, the runner groove and the sprue material in the glue inlet groove are ejected synchronously through the straight ejector.

[0012] Furthermore, a contact portion is provided at the upper end of the straight ejector pin, and a diameter of the contact portion is smaller than a diameter of the main body of the straight ejector pin.

[0013] Furthermore, a first cooling water channel is provided inside the mold core, and at least a portion of the first cooling water channel is provided close to the molding groove.

[0014] Furthermore, a second cooling water channel is provided inside the mold core insert, and at least a portion of the second cooling water channel is provided close to the glue inlet groove.

[0015] An injection mold comprises the injection mold assembly of the TPU material.

[0016] The TPU material injection mold assembly and injection mold provided by the utility model can realize automatic separation of the product and the nozzle material during the mold opening process, thereby avoiding product appearance defects caused when the product is separated from the nozzle material, and greatly improving the product yield. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0018] Figure 1 This is a three-dimensional diagram of the injection mold assembly of the TPU material of the utility model.

[0019] Figure 2 for Figure 1 A three-dimensional view of the partial structure of the injection mold assembly of TPU material is shown.

[0020] Figure 3 for Figure 1 A top view of the injection mold assembly for TPU material is shown.

[0021] Figure 4 for Figure 3 The cross-sectional view of the injection mold assembly of the TPU material along the AA plane is shown.

[0022] Figure 5 for Figure 4 A cross-sectional view of the mold insert is shown.

[0023] Figure 6 for Figure 5 A partial enlarged view of point B of the mold insert is shown.

[0024] Figure 7 This is a schematic diagram of the mold insert, product, and nozzle material of the present invention.

[0025] Figure 8 for Figure 7 The schematic diagram of the mold insert, product and sprue material from another angle is shown.

[0026] Figure 9 It is a three-dimensional diagram of the mold core of the present invention.

[0027] Figure 10 for Figure 9 A three-dimensional view of the mold core from another angle is shown.

[0028] Figure 11 It is a three-dimensional diagram of the mold insert of the present invention.

[0029] Figure 12 It is a three-dimensional diagram of the mold core of the present invention.

[0030] Figure 13 This is a schematic diagram of the injection mold assembly of the TPU material of the present invention. DETAILED DESCRIPTION

[0031] The specific embodiments of the present application will now be described in detail with reference to the accompanying drawings. Apparently, the described embodiments are only a part but not all of the embodiments of the present application. Based on the description of the present application, all the other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present application.

[0032] The terms "upper", "lower", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship when the product of the present application is usually placed, and are only for the convenience of description and simplification of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0033] The terms "include", "contain" or any other variants thereof are intended to cover non-exclusive inclusion, in addition to containing the listed elements, other elements not explicitly listed can also be contained.

[0034] Please refer to Figures 1-12 The utility model discloses a kind of injection mould assemblies of TPU material, including mould 10, movable installation mould core 20 in the upper portion of the mould 10, with the sliding mechanism 50 of the mould core 20 sliding connection, with the fixed connection of the mould core 20 ejection mechanism 70 And movable installation mould insert 30 in the lower portion of the mould 10, the upper surface of the mould 10 is equipped with the installation groove 11 of installation mould core 20, the groove bottom wall of the installation groove 11 is equipped with the through groove 112 of accommodating the sliding mechanism 50 And the needle groove 111 of accommodating the ejection mechanism 70, the mould 10, the mould core 20 and the sliding mechanism 50 are collectively enclosed into the forming groove 13 of product 100, the lower surface of the mould 10 is equipped with the insert groove 113 of accommodating the mould insert 30, at least part of the insert groove 113 passes through the upper surface of the mould 10, the upper surface of the mould 10 is recessed with flow channel groove 12, the upper end of the mould insert 30 is recessed with glue inlet recess 31, the glue inlet recess 31 is collectively enclosed into glue inlet channel with the mould 10 and the mould core 20, two ends of the glue inlet channel are connected with the forming groove 13 and the flow channel groove 12 respectively,

[0035] When the injection mold assembly of the TPU material is injection-molded, the molten TPU material is injected into the glue feed channel through the runner groove 12, and enters the molding groove 13 through the glue feed port 311 to form the product 100; when the injection mold assembly of the TPU material is opened, the mold core insert 30 moves downward to separate the molding groove 13 from the glue feed port 311, and the product 100 in the molding groove 13 is separated from the glue feed channel and the sprue material 200 in the glue feed port 311, and the ejection mechanism 70 drives the mold core 20 to eject the product 100 upward.

[0036] See also Figure 3-Figure 6 At least a portion of the glue inlet 311 is configured to gradually contract from the glue inlet groove 31 toward the molding groove 13. In this embodiment, the glue inlet 311 is provided with an inverted trumpet-shaped glue inlet section at one end near the molding groove 13, and the diameter of any cross-section of the glue inlet section is smaller than the diameter of the glue inlet 311 at the end near the glue inlet groove 31. In other embodiments, the entire glue inlet 311 may be configured in an inverted trumpet shape, which is not particularly limited herein. Furthermore, the extended length of the glue inlet 311 is less than or equal to 5 mm. When the extension length of the glue inlet 311 is greater than 5 mm, the mold insert 30 cannot completely disconnect the sprue material 200 and the product 100 during the downward movement. Preferably, in this embodiment, the extension length of the glue inlet 311 is 3.3 mm, which is defined based on the specific structure of the designed product and calculated and experimental data. For other products, the extension length of the glue inlet 311 is designed to be less than or equal to 5 mm, so that the mold insert 30 can completely disconnect the sprue material 200 and the product 100 during the downward movement. No special limitation is made here.

[0037] See also Figure 12 and Figure 13 The mold core 20 is provided with a sliding groove 21 for accommodating the sliding mechanism 50. When the ejection mechanism 70 drives the mold core 20 upward, the sliding mechanism 50 slides downward relative to the mold core 20 along the sliding groove 21. In this embodiment, the sliding mechanism 50 is provided with a molding structure that matches the product. Therefore, the product 100 is separated from the molding structure of the sliding mechanism 50 and is successfully demolded.

[0038] See also Figures 1-4 Furthermore, in this embodiment, the sliding mechanism 50 is fixedly mounted on the mold core 10, and a support pin 40 is mounted at the lower end of the sliding mechanism 50 for supporting the sliding mechanism 50. The support pin 40 pushes the sliding mechanism 50 upward to fix it relative to the mold core 10.

[0039] See also Figure 4、 Figure 5 、 Figure 7 and Figure 11 The mold insert 30 is provided with an ejector hole 32 along the vertical direction, and the ejector hole 32 is connected to the glue inlet groove 31. The injection mold assembly of the TPU material also includes a straight ejector 60, and the straight ejector 60 is arranged in the ejector hole 32. Furthermore, the ejector hole 32 is also connected to the runner groove 12. When ejecting the product, the runner groove 12 and the sprue material 200 in the glue inlet groove 31 are ejected synchronously through the straight ejector 60.

[0040] Please continue reading Figure 4 More specifically, the upper end of the straight ejector pin 60 is provided with a contact portion, the diameter of which is smaller than the diameter of the main body of the straight ejector pin 60. During injection molding, the contact portion of the straight ejector pin 60 extends upward into the glue inlet groove 31 or further into the runner groove 12. The contact portion is molded into the sprue material 200. When the main body of the straight ejector pin 60 presses upward against the sprue material 200, the contact portion can fix the sprue material 200 and move it upward vertically, allowing it to be grasped by an external robot, thereby achieving automated production.

[0041] See also Figure 12 A first cooling water channel 22 is provided inside the mold core 20, and at least a portion of the first cooling water channel 22 is provided close to the molding groove 13. By transporting cooling water in the first cooling water channel 22, rapid cooling can be achieved, reducing the solidification time of the molten TPU material, and greatly improving production efficiency.

[0042] See also Figure 5 A second cooling water channel 33 is provided inside the mold insert 30, and at least a portion of the second cooling water channel 33 is arranged close to the glue inlet groove 31. By transporting cooling water in the second cooling water channel 33, rapid cooling can be achieved, reducing the solidification time of the molten TPU material, and greatly improving production efficiency.

[0043] Furthermore, the first cooling water channel 22 and the second cooling water channel 33 are arranged to communicate with each other, so that cooling water can flow in the mold core 20 and the mold insert 30 .

[0044] The utility model also discloses an injection mold, which comprises the injection mold component of the TPU material.

[0045] The TPU material injection mold assembly and injection mold provided by the utility model can realize automatic separation of the product and the nozzle material during the mold opening process, thereby avoiding product appearance defects caused when the product is separated from the nozzle material, and greatly improving the product yield.

[0046] The above merely provides the specific implementation of the present application, but the protection scope of the present application is not limited thereto, any person skilled in the art can easily think of the changes or replacements within the technical range disclosed by the present application, which should be covered in the protection scope of the present application.

Claims

1. A TPU material injection mold assembly, characterized in that: include: The cam is provided with a plurality of sliding grooves, the sliding grooves are provided with a plurality of grooves, and the sliding grooves are provided with a plurality of grooves. The cam is provided with a plurality of sliding grooves, the grooves are provided with a plurality of grooves, and the grooves are provided with a plurality of grooves. When the injection mold assembly of the TPU material is injection molding, the molten TPU material is injected into the glue inlet channel through the runner groove, and enters the molding groove through the glue inlet to form a product; when the injection mold assembly of the TPU material is opened, the mold core insert moves downward to separate the molding groove from the glue inlet, and the product in the molding groove is separated from the glue inlet channel and the sprue material in the glue inlet, and the ejection mechanism drives the mold core to eject the product upward.

2. The injection mold assembly of TPU material according to claim 1, characterized in that At least a portion of the glue inlet is gradually contracted from the glue inlet groove toward the molding groove.

3. The injection mold assembly of TPU material according to claim 1, characterized in that The extended length of the glue inlet is less than or equal to 5 mm.

4. The injection mold assembly of TPU material according to claim 1, characterized in that The mold core is provided with a sliding groove for accommodating the sliding mechanism.

5. The injection mold assembly of TPU material according to claim 1, characterized in that The sliding mechanism is fixedly mounted on the mold core, and a supporting pin for supporting the sliding mechanism is mounted on the lower end of the sliding mechanism.

6. The injection mold assembly of TPU material according to claim 1, characterized in that The mold core insert is provided with an ejector hole along the vertical direction, and the ejector hole is connected to the glue inlet groove. The injection mold assembly of the TPU material also includes a straight ejector, and the straight ejector is arranged in the ejector hole. When ejecting the product, the sprue material in the runner groove and the glue inlet groove is ejected synchronously by the straight ejector.

7. The injection mold assembly of TPU material according to claim 6, characterized in that A contact portion is provided at the upper end of the straight ejector pin, and a diameter of the contact portion is smaller than a diameter of the main body of the straight ejector pin.

8. The injection mold assembly of TPU material according to claim 1, characterized in that: A first cooling water channel is provided inside the mold core, and at least a portion of the first cooling water channel is provided close to the molding groove.

9. The injection mold assembly of TPU material according to claim 1, characterized in that: A second cooling water channel is provided inside the mold core insert, and at least a portion of the second cooling water channel is provided close to the glue inlet groove.

10. An injection mold, characterized in that: An injection mold assembly comprising the TPU material according to any one of claims 1 to 9.

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