Forming die

Abstract

The utility model provides a forming die which comprises a die assembly and a heating piece, the die assembly is provided with a forming cavity, the forming cavity is used for forming a workpiece, a main flow channel is formed in the die assembly and used for allowing hot fluid to flow, and the extending direction of the main flow channel is parallel to the extending direction of the forming cavity; the main runner is annularly arranged on the periphery of the cavity wall of the forming cavity; the heating piece is arranged on the periphery of the mold assembly in a sleeving mode and used for heating the mold assembly.

Description

Technical Field

[0001] The present application relates to the technical field of product processing, and in particular to a molding die. Background Art

[0002] When lenses are processed by injection molding, the mold used to mold the lenses is often heated unevenly, resulting in large internal stress in the molded lenses, which affects the quality of the lenses. Utility Model Content

[0003] The present application provides a molding mold to solve the problem in the prior art that the internal stress of the lens is large and affects its quality.

[0004] The present application provides a molding die, comprising a mold assembly and a heating element, wherein the mold assembly is provided with a molding cavity, wherein the molding cavity is used to mold a workpiece, wherein a main flow channel is provided in the mold assembly, wherein the main flow channel is used to flow a heating fluid, wherein an extension direction of the main flow channel is parallel to an extension direction of the molding cavity, and the main flow channel is arranged around the periphery of a cavity wall of the molding cavity; and a heating element is sleeved on the periphery of the mold assembly, wherein the heating element is used to heat the mold assembly.

[0005] In a possible embodiment, the mold assembly includes a first mold and a second mold, the first mold is used to be molded together with the second mold, a first molding groove is provided on a side of the first mold close to the second mold, and a second molding groove is provided on a side of the second mold close to the first mold, and when the first mold is molded together with the second mold, the second molding groove is connected to the first molding groove.

[0006] In a possible implementation, the main flow channel includes a first flow channel and a second flow channel, the first flow channel is arranged in the first mold, the second flow channel is arranged in the second mold, and the second flow channel and the first flow channel are both used for the hot fluid to flow.

[0007] In a possible implementation, an extension direction of the first flow channel is parallel to an extension direction of the first molding groove, and the first flow channel is arranged around an outer periphery of a groove wall of the first molding groove.

[0008] In a possible implementation manner, a first inlet and a first outlet are formed on an outer surface of the first mold, and the first inlet and the first outlet are respectively connected to two ends of the first flow channel.

[0009] In a possible embodiment, the first flow channel includes a plurality of first sections and a plurality of second sections, the first sections are arranged around the outer periphery of the groove wall of the first molding groove, and along the extension direction of the first molding groove, the plurality of first sections are arranged in sequence at intervals, and any two adjacent first sections are connected through the second sections.

[0010] In a possible implementation, an extension direction of the second flow channel is parallel to an extension direction of the second molding groove, and the second flow channel is arranged around the outer periphery of the groove wall of the second molding groove.

[0011] In a possible implementation manner, a second inlet and a second outlet are formed on an outer surface of the second mold, and the second inlet and the second outlet are respectively connected to two ends of the second flow channel.

[0012] In a possible embodiment, the second flow channel includes a plurality of third sections and a plurality of fourth sections, the third sections are arranged around the outer periphery of the groove wall of the second molding groove, and along the extension direction of the second molding groove, the plurality of third sections are arranged in sequence at intervals, and any two adjacent third sections are connected through the fourth section.

[0013] In a possible implementation manner, when the first mold and the second mold are molded together, the heating element is sleeved on the outer circumference of the first mold and the second mold to heat the first mold and the second mold.

[0014] The molding mold of the present application, by opening a main flow channel in the mold assembly, the main flow channel is arranged around the periphery of the cavity wall of the molding cavity, and the extension direction of the main flow channel is parallel to the extension direction of the molding cavity, to ensure that when the hot fluid flows in the main flow channel, the hot fluid can evenly heat the materials contained in each section of the molding cavity, thereby reducing the internal stress of the lens after molding. In addition, the heating element is sleeved on the periphery of the mold assembly, which is convenient for rapid replacement of the heating element, so as to select a suitable heating element according to the temperature conditions at each section of the molding cavity, to ensure that the materials contained in each section of the molding cavity are evenly heated by the heating element, thereby further reducing the internal stress of the lens after molding. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic structural diagram of a forming mold of the present application in one embodiment.

[0016] Figure 2 for Figure 1 A schematic front view of the molding die in one embodiment.

[0017] Figure 3 It is a schematic top view of a first mold in one embodiment of the molding mold of the present application.

[0018] Figure 4 It is a schematic top view of a second mold in one embodiment of the molding mold of the present application.

[0019] Figure 5 It is a schematic side view of a mold assembly of a molding mold in one embodiment of the present application.

[0020] Figure 6 It is a schematic structural diagram of a heating element in one embodiment of the molding die of the present application.

[0021] Description of main component symbols:

[0022] Molding mold 100

[0023] Mold assembly 10

[0024] The first mold 11

[0025] The first inlet 111

[0026] The first outlet 112

[0027] The second mold 12

[0028] The second inlet 121

[0029] Second outlet 122

[0030] Molding cavity 20

[0031] First molding groove 21

[0032] Second molding groove 22

[0033] Heating element 30

[0034] The first heating unit 31

[0035] Second heating unit 32

[0036] Main channel 40

[0037] First flow channel 41

[0038] First District 411

[0039] Second District 412

[0040] Second flow channel 42

[0041] Third District 421

[0042] Fourth District 422

[0043] The following specific implementation methods will further illustrate the present application in conjunction with the above-mentioned drawings. DETAILED DESCRIPTION

[0044] The following description will refer to the accompanying drawings to more fully describe the content of the present application. Shown in the accompanying drawings are exemplary embodiments of the present application. However, the present application can be implemented in many different forms and should not be interpreted as being limited to the exemplary embodiments set forth herein. These exemplary embodiments are provided to make the present application thorough and complete, and to fully convey the scope of the present application to those skilled in the art. Similar reference numerals represent identical or similar components.

[0045] The terms used herein are only used for the purpose of describing specific exemplary embodiments and are not intended to limit the present application. As used herein, unless the context clearly indicates otherwise, the singular forms "a", "an" and "the" are intended to also include the plural forms. In addition, when used herein, "including" and / or "comprising" and / or "having", integers, steps, operations, components and / or components, but do not exclude the existence or addition of one or more other features, regions, integers, steps, operations, components and / or groups thereof.

[0046] Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by those of ordinary skill in the art to which this application belongs. In addition, unless explicitly defined herein, terms such as those defined in general dictionaries should be interpreted as having a meaning consistent with their meaning in the relevant technology and the content of this application, and will not be interpreted as an idealized or overly formal meaning.

[0047] The specific implementation methods of the present application are further described in detail below with reference to the accompanying drawings.

[0048] like Figure 1 to Figure 2 As shown, this embodiment provides a molding mold 100, including a mold assembly 10 and a heating element 30. The mold assembly 10 is used to process workpieces such as lenses, and the mold assembly 10 can be used in conjunction with different processes such as injection molding or injection molding to process the workpiece.

[0049] The mold assembly 10 is provided with a molding cavity 20, and the molding cavity 20 is used to mold a workpiece. The molding cavity 20 can contain molten glue, which can be made of materials such as plastic, and the molten glue can be solidified in the molding cavity 20 to form a lens. It is understandable that the material contained in the molding cavity 20 can also be other materials such as glass, and its specific material can be adaptively selected according to the actual workpiece to be processed. It is worth noting that most of the lenses after curing and molding need to be annealed to eliminate the internal stress of the lenses, and when the lenses are annealed, each area of ​​the lenses is heated evenly to ensure that the internal stress of the lenses can be eliminated as much as possible.

[0050] A main channel 40 is provided in the mold assembly 10, and the main channel 40 is used for the flow of a heat fluid. The heat fluid may be a fluid such as heat transfer oil, which is heated and injected into the main channel 40, so that the heat transfer oil contacts the mold assembly 10 and performs heat exchange to heat the mold assembly 10. The extension direction of the main channel 40 is parallel to the extension direction of the molding cavity 20, so that the heat fluid can act on each section of the molding cavity 20 in its extension direction. The main channel 40 is arranged around the periphery of the cavity wall of the molding cavity 20, so that the heat fluid can act on each section of the molding cavity 20 on its cross section. The heating element 30 is sleeved on the periphery of the mold assembly 10, and the heating element 30 is used to heat the mold assembly 10.

[0051] Thus, the molding mold 100 of the present application, by opening a main flow channel 40 in the mold assembly 10, the main flow channel 40 is arranged around the periphery of the cavity wall of the molding cavity 20, and the extension direction of the main flow channel 40 is parallel to the extension direction of the molding cavity 20, to ensure that when the hot fluid flows in the main flow channel 40, the hot fluid can evenly heat the materials contained in each section of the molding cavity 20, thereby reducing the internal stress after the lens is molded. In addition, the heating element 30 is sleeved on the periphery of the mold assembly 10, which is convenient for quickly replacing the heating element 30, so as to select a suitable heating element 30 according to the temperature conditions at each section of the molding cavity 20, to ensure that the materials contained in each section of the molding cavity 20 are evenly heated by the heating element 30, thereby further reducing the internal stress after the lens is molded.

[0052] Please combine again Figure 2 In one embodiment, the mold assembly 10 includes a first mold 11 and a second mold 12, and the first mold 11 is used to mold with the second mold 12. The first mold 11 and the second mold 12 are both made of heat-conducting materials to ensure that the thermal fluid can transfer heat to the workpiece in the molding cavity 20 through the first mold 11 and the second mold 12.

[0053] A first molding groove 21 is provided on the side of the first mold 11 close to the second mold 12. The cross section of the first molding groove 21 is semicircular, and the first molding groove 21 is formed after the surface of the first mold 11 close to the second mold 12 is recessed in a direction away from the second mold 12. A second molding groove 22 is provided on the side of the second mold 12 close to the first mold 11. The cross section of the second molding groove 22 is also semicircular, and the second molding groove 22 is formed after the surface of the second mold 12 close to the first mold 11 is recessed in a direction away from the first mold 11. The second molding groove 22 has the same shape and size as the first molding groove 21. When the first mold 11 and the second mold 12 are molded together, the second molding groove 22 is connected to the first molding groove 21, and the first molding groove 21 and the second molding groove 22 are connected to form a molding cavity 20, and the cross section of the molding cavity 20 is circular.

[0054] It is understandable that when other embodiments are adopted, the mold assembly 10 can also be set as only a single mold, and the single mold has a complete molding cavity 20, and there is no need to form the molding cavity 20 by combining two molds.

[0055] Please combine again Figures 2 to 5 In one embodiment, the main flow channel 40 includes a first flow channel 41 and a second flow channel 42. The first flow channel 41 is disposed in the first mold 11, and the second flow channel 42 is disposed in the second mold 12. The second flow channel 42 and the first flow channel 41 are both used for the flow of the heating fluid.

[0056] Furthermore, the extension direction of the first flow channel 41 is parallel to the extension direction of the first molding groove 21, so that the hot fluid can evenly act on each section of the workpiece in the first molding groove 21 in the extension direction, ensuring that each section of the workpiece in the extension direction is heated evenly. The first flow channel 41 is arranged around the outer periphery of the groove wall of the first molding groove 21, so that the hot fluid can evenly act on each section of the workpiece in the first molding groove 21 on its cross section, ensuring that each section of the workpiece on its cross section is heated evenly.

[0057] In addition, the outer surface of the first mold 11 is provided with a first inlet 111 and a first outlet 112, and the first inlet 111 and the first outlet 112 are respectively connected to the two ends of the first flow channel 41. The molding mold 100 may also include a circulating liquid feeding device (not shown in the figure), and the first inlet 111 and the first outlet 112 can be connected to the circulating liquid feeding device to form a circulating heating loop, and the circulating liquid feeding device feeds the hot fluid from the first inlet 111 into the first flow channel 41, and receives the hot fluid flowing out from the first outlet 112, so as to heat the hot fluid and then feed it into the first flow channel 41.

[0058] The first flow channel 41 includes a plurality of first sections 411 and a plurality of second sections 412. The first sections 411 are arranged around the outer periphery of the groove wall of the first molding groove 21. Along the extension direction of the first molding groove 21, the plurality of first sections 411 are arranged in sequence and spaced apart, and any two adjacent first sections 411 are connected through the second sections 412. First section 411.

[0059] The shape of the first section 411 is a "U" shape, a gate arch shape, or an "N" shape, etc. The shape of the first section 411 can be adaptively selected according to actual design requirements. Along the extension direction of the first molding groove 21, the two ends of the first section 411 are spaced apart. In addition, the first section 411 is bent so that the first section 411 can surround the outer periphery of the groove wall of the first molding groove 21, and the first section 411 is spaced apart from the groove wall of the first molding groove 21. In particular, the bending path of the first section 411 is a semicircular arc, so that the bent first section 411 is adapted to the shape of the groove wall of the first molding groove 21, ensuring that along the bending direction of the first section 411, the intervals between each section of the first section 411 and the groove wall of the first molding groove 21 are the same, ensuring that the workpiece in the first molding groove 21 is heated evenly.

[0060] The number of the second sections 412 is one less than the number of the first sections 411, and any two adjacent first sections 411 are connected through one second section 412. The second sections 412 are linear, and the extension direction of the second sections 412 is parallel to the extension direction of the first molding groove 21, and the plurality of second sections 412 are collinearly arranged. One end of the second section 412 is connected to an end of an adjacent first section 411 close to one end of the second section 412, and the other end of the second section 412 is connected to an end of another adjacent first section 411 close to one end of the second section 412.

[0061] Furthermore, the extension direction of the second flow channel 42 is parallel to the extension direction of the second molding groove 22, and the second flow channel 42 is arranged around the outer periphery of the groove wall of the second molding groove 22. The shape and size of the second flow channel 42 are the same as those of the first flow channel 41, so as to ensure that the heating state of the workpiece in the second molding groove 22 by the hot fluid in the second flow channel 42 is consistent with the heating state of the workpiece in the first molding groove 21 by the hot fluid in the first flow channel 41, thereby ensuring the uniformity of heating of the workpiece.

[0062] In addition, the outer surface of the second mold 12 is provided with a second inlet 121 and a second outlet 122, which are respectively connected to both ends of the second flow channel 42. The second inlet 121 and the second outlet 122 can be connected to the circulating liquid feeding device to form a circulating heating circuit.

[0063] The second flow channel 42 includes a plurality of third sections 421 and a plurality of fourth sections 422. The third sections 421 are arranged around the outer periphery of the groove wall of the second forming groove 22. Along the extension direction of the second forming groove 22, the plurality of third sections 421 are arranged in sequence and spaced apart, and any two adjacent third sections 421 are connected through the fourth section 422. The specific structure and principle of the second flow channel 42 are the same as those of the first flow channel 41, and will not be described in detail.

[0064] Please combine again Figure 6 , and see Figure 1 In one embodiment, when the first mold 11 and the second mold 12 are molded together, the heating element 30 is sleeved on the outer periphery of the first mold 11 and the second mold 12 for heating the first mold 11 and the second mold 12. The heating element 30 includes a plurality of first heating parts 31 and a plurality of second heating parts 32. The plurality of first heating parts 31 are arranged in sequence and spaced apart along the extension direction of the molding cavity 20. The shape of the first heating part 31 is the same as the shape of the mold assembly 10 after the first mold 11 and the second mold 12 are molded together, that is, when the mold assembly 10 is a rectangular structure, the first heating part 31 is a gate arch and is arranged around the outer periphery of the mold assembly 10. The number of the second heating parts 32 is one less than the number of the first heating parts 31, and any two adjacent first heating parts 31 are connected in an integral manner through one first heating part 31.

[0065] Specifically, the heating element 30 is formed by continuously bending a resistance wire. The resistance wire can wrap around the outer circumference of the mold assembly 10 to form a first heating portion 31, and then the resistance wire is stretched forward along the extension direction of the outer circumference of the mold assembly 10 to form a second heating portion 32. Next, the stretched resistance wire continues to wrap around the outer circumference of the mold assembly 10 to form another first heating portion 31, and the above actions are repeated until the resistance wire can extend to cover each section of the outer circumference of the mold assembly 10.

[0066] It is understandable that after the heating element 30 is processed and formed using the resistance wire in the above manner, the heating element 30 has a certain elasticity in its extension direction, so that the heating element 30 can be stretched or compressed, thereby adapting to the mold assembly 10 of the molding cavity 20 of different lengths.

[0067] In addition, since the heating element 30 has a certain elasticity, the spacing between two adjacent first heating parts 31 can be adjusted to achieve the distribution density adjustment of the heating element 30 in the extension direction of the mold assembly 10. When the heating conditions of various regions of the workpiece in the molding cavity 20 in the extension direction are different, the spacing of the first heating parts 31 of the heating element 30 corresponding to the region with lower temperature can be reduced, or the spacing of the first heating parts 31 of the heating element 30 corresponding to the region with higher temperature can be increased, so that various regions of the workpiece can be heated evenly under the action of the heating element 30 and the hot fluid.

[0068] In addition, the molding die 100 further includes a plurality of temperature sensors (not shown in the figure). The plurality of temperature sensors are arranged at intervals along the extension direction of the molding cavity 20 to respectively monitor the temperature of each region of the workpiece in the molding cavity 20 along the extension direction thereof, thereby adjusting the distribution density of the heating element 30 according to the temperature of each temperature sensor.

[0069] It is worth noting that the heating element 30 is directly sleeved on the outer peripheral surface of the mold assembly 10 , which facilitates the disassembly and assembly of the heating element 30 , and the heating element 30 can be applied to different mold assemblies 10 .

[0070] It is understandable that the heating element 30 can not only directly heat the mold assembly 10 , but also transfer heat to the hot fluid in the main channel 40 through the mold assembly 10 , thereby maintaining the temperature of the hot fluid without significant changes.

[0071] In the above, the specific embodiments of the present application are described with reference to the accompanying drawings. However, those skilled in the art will appreciate that various changes and substitutions may be made to the specific embodiments of the present application without departing from the scope of the present application. These changes and substitutions are all within the scope defined by the present application.

Claims

1. A molding die, characterized in that: include: A mold assembly is provided with a molding cavity, the molding cavity is used to mold a workpiece, a main flow channel is provided in the mold assembly, the main flow channel is used to flow a heating fluid, an extension direction of the main flow channel is parallel to an extension direction of the molding cavity, and the main flow channel is arranged around the periphery of a cavity wall of the molding cavity; A heating element is sleeved on the outer circumference of the mold assembly, and the heating element is used to heat the mold assembly.

2. The molding die according to claim 1, characterized in that: The mold assembly includes a first mold and a second mold, the first mold is used to be molded together with the second mold, a first molding groove is provided on a side of the first mold close to the second mold, and a second molding groove is provided on a side of the second mold close to the first mold. When the first mold is molded together with the second mold, the second molding groove is connected to the first molding groove.

3. The molding die according to claim 2, characterized in that: The main flow channel includes a first flow channel and a second flow channel, the first flow channel is arranged in the first mold, the second flow channel is arranged in the second mold, and the second flow channel and the first flow channel are both used for the hot fluid to flow.

4. The molding die according to claim 3, characterized in that: The extension direction of the first flow channel is parallel to the extension direction of the first molding groove, and the first flow channel is surrounded by the outer periphery of the groove wall of the first molding groove.

5. The molding die according to claim 4, characterized in that: A first inlet and a first outlet are formed on the outer surface of the first mold, and the first inlet and the first outlet are connected to two ends of the first flow channel respectively.

6. The molding die according to claim 4, characterized in that: The first flow channel includes a plurality of first sections and a plurality of second sections. The first sections are arranged around the outer periphery of the groove wall of the first forming groove. Along the extension direction of the first forming groove, the plurality of first sections are arranged in sequence at intervals, and any two adjacent first sections are connected through the second sections.

7. The molding die according to claim 3, characterized in that: The extension direction of the second flow channel is parallel to the extension direction of the second molding groove, and the second flow channel is arranged around the outer periphery of the groove wall of the second molding groove.

8. The molding die according to claim 7, characterized in that: A second inlet and a second outlet are formed on the outer surface of the second mold, and the second inlet and the second outlet are respectively connected to two ends of the second flow channel.

9. The molding die according to claim 7, characterized in that: The second flow channel includes multiple third sections and multiple fourth sections. The third sections are arranged around the outer periphery of the groove wall of the second molding groove. Along the extension direction of the second molding groove, the multiple third sections are arranged in sequence at intervals, and any two adjacent third sections are connected through the fourth section.

10. The molding die according to claim 2, characterized in that: When the first mold and the second mold are molded together, the heating element is sleeved on the outer circumference of the first mold and the second mold to heat the first mold and the second mold.

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