Light-curing mold and injection molding method

Abstract

The present application proposes a light-curing mold, including a first mold, the first mold including a first template; the first mold core including a mold core body, a first light-transmitting member, and a second light-transmitting member. The present application also provides an injection molding method, including: molding molten polytetramethylpentene in sections onto the mold core body and covering it with a glue structure to form a first light-transmitting member and a second light-transmitting member, the first light-transmitting member and the second light-transmitting member being fixedly connected to the mold core body via the glue structure; opening the first mold and the second mold to place the workpiece into the molding cavity; closing the first mold and the second mold to inject the molten colloid into the molding cavity; irradiating the colloid with an external light source through the first light-transmitting member and the second light-transmitting member to solidify the colloid onto the workpiece; opening the first mold and the second mold to remove the workpiece with the solidified colloid. The first and second light-transmitting members are supported by the glue structure, and the high light transmittance of polytetramethylpentene is utilized to rapidly solidify the colloid, thereby improving molding efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of injection mold technology, and in particular to a light-curing mold and an injection molding method. Background Art

[0002] Today, light-curing molds typically use a combination of glass, epoxy resin, and silicone to create a transparent component. This allows ultraviolet light to illuminate the colloid within the molding cavity, causing it to solidify onto the workpiece within the molding cavity, forming the final product. However, the low light transmittance of these components, including glass, epoxy, and silicone, prolongs the curing time and reduces molding efficiency.

[0003] Existing TPX (Transparent Polymer X), or polytetramethylpentene, is a preferred material for the transparent components of photocurable molds due to its high light transmittance and high melting point. However, when TPX is molded into the template of a photocurable mold to form the transparent component, its high shrinkage can cause the molded dimensions of the transparent component to deviate significantly from the desired dimensions, thereby reducing the injection molding accuracy of the resulting photocurable mold. Summary of the Invention

[0004] In view of the above, it is necessary to propose a light-curing mold and an injection molding method, which can be used to injection mold TPX material into a light-transmitting part to improve molding efficiency.

[0005] An embodiment of the present application provides a light-curing mold, comprising a first mold and a second mold that are adapted to be opened and matched, wherein a molding cavity can be formed between the first mold and the second mold, wherein the first mold comprises: a first template provided with a light-transmitting hole; a first mold core comprising: a mold core body embedded in the first template and provided with a first connecting hole and a second connecting hole at intervals, wherein the first connecting hole is connected to the light-transmitting hole, and a glue-pulling structure is provided on a side of the mold core body facing the second mold when the molds are closed; a first light-transmitting member embedded in the first connecting hole and connected to a portion of the glue-pulling structure, wherein the first light-transmitting member abuts against the second mold when the molds are closed to form the molding cavity, so that the molding cavity accommodates a workpiece and receives molten colloid; a second light-transmitting member embedded in the second connecting hole and connected to another portion of the glue-pulling structure to maintain the sealing of the molding cavity, wherein the first light-transmitting member and the second light-transmitting member are both polytetramethylpentene, and an external light source is irradiated to the first light-transmitting member and the second light-transmitting member through the light-transmitting hole when the molds are closed, so that the external light source solidifies the colloid onto the workpiece through the first light-transmitting member and the second light-transmitting member.

[0006] When the above-mentioned light-curing mold is in operation, first, molten polytetramethylpentene is molded onto the mold core body, part of the molten polytetramethylpentene is located in the first connecting hole and covers part of the glue structure to form a first light-transmitting part, and another part of the molten polytetramethylpentene is located in the second connecting hole and covers another part of the glue structure to form a second light-transmitting part. The first light-transmitting part and the second light-transmitting part maintain structural stability under the support of the glue structure, which can prevent the first light-transmitting part and the second light-transmitting part from deforming after molding, so that the mold core body, the first light-transmitting part and the second light-transmitting part stably form the first mold core; the first mold and the second mold are opened, and the workpiece is placed in the molding cavity; then, the first mold and the second mold are closed, and the molten colloid is injected into the molding cavity, and then an external light source is used to irradiate the colloid through the first light-transmitting part and the second light-transmitting part, and the high light transmittance of polytetramethylpentene is used to make the colloid quickly solidify on the workpiece; finally, the first mold and the second mold are opened to remove the workpiece with the solidified colloid. In this way, by molding molten polytetramethylpentene onto the mold body and covering it with a glue structure to form the first light-transmitting member and the second light-transmitting member, the first light-transmitting member and the second light-transmitting member are fixedly connected to the glue structure, and the first light-transmitting member and the second light-transmitting member are stably connected to the mold body under the support of the glue structure, so that the first light-transmitting member and the second light-transmitting member maintain structural stability after molding, avoiding deformation of the polytetramethylpentene body after molding due to its high shrinkage rate. Since the first light-transmitting member and the second light-transmitting member are both polytetramethylpentene bodies, the high transmittance characteristics of the polytetramethylpentene body are utilized to improve the transmittance of the light-curing mold, thereby reducing the curing time of the colloid and improving the molding efficiency.

[0007] In some embodiments, the glue pulling structure includes: a plurality of protrusions, which are arranged at intervals on the side of the mold core body facing the second mold when the mold is closed, and the protrusions protrude into the polytetramethylpentene body so that the protrusions support the polytetramethylpentene body.

[0008] In some embodiments, the glue pulling structure also includes: a plurality of recessed portions, which are spaced apart from the protruding body on the mold body, and part of the polytetramethylpentene body is molded in the recessed portions so that the first light-transmitting member and the second light-transmitting member are connected to the mold body, wherein each of the recessed portions is shaped like a teardrop or an inverted cone.

[0009] In some embodiments, the first connection hole is located outside the second connection hole, and the hardness of the first light-transmitting member is greater than the hardness of the second light-transmitting member.

[0010] In some embodiments, the first mold further includes: a through-hole light-transmitting member, embedded in the light-transmitting hole and the through-hole light-transmitting member is polytetramethylpentene, used to maintain the sealing of the first mold and transmit external light, wherein the hole wall of the light-transmitting hole is set to be conical.

[0011] In some embodiments, a material partition is provided in each of the first connection hole and the second connection hole, and the material partition is used to separate the first connection hole and the second connection hole into a plurality of through-hole structures.

[0012] In some embodiments, a teardrop-shaped or inverted cone-shaped recessed structure is provided on the hole wall of the first connecting hole and the second connecting hole.

[0013] In some embodiments, the second mold includes: a second template, which is arranged opposite to the first template when the mold is closed; a second mold core, which is embedded in the second template, and the second mold core abuts the first template when the mold is closed to form the molding cavity.

[0014] In some embodiments, the second mold further includes: a flexible member embedded in the second mold core and surrounding the molding cavity to maintain the sealing of the molding cavity.

[0015] In some embodiments, the flexible member is a silicone body.

[0016] In some embodiments, the second mold further includes: a pressing member, one end of which is rotatably connected to the second template, and the other end of which presses the first template toward the second template when the mold is closed.

[0017] The embodiment of the present application also adopts an injection molding method, which includes: molding molten polytetramethylpentene in sections onto a mold body and covering it with a glue pulling structure to form a first light-transmitting member and a second light-transmitting member, wherein the first light-transmitting member and the second light-transmitting member are fixedly connected to the mold body through the glue pulling structure; opening the first mold and the second mold to place the workpiece into the molding cavity; closing the first mold and the second mold to inject molten colloid into the molding cavity; irradiating the colloid with an external light source through the first light-transmitting member and the second light-transmitting member to solidify the colloid on the workpiece; opening the first mold and the second mold to remove the workpiece solidified with the colloid. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A schematic diagram of the three-dimensional structure of the light-curing mold provided in an embodiment of the present application.

[0019] Figure 2 for Figure 1 Schematic diagram of the structural decomposition of the light-curing mold shown.

[0020] Figure 3 for Figure 2 The three-dimensional structural diagram of the mold core body is shown.

[0021] Figure 4 for Figure 3The diagram shows a partial enlarged view of the position of the mold body IV.

[0022] Figure 5 for Figure 1 The schematic diagram of the partial cross section of the light-curing mold along the V-V direction is shown.

[0023] Figure 6 for Figure 5 A partially enlarged schematic diagram of the position of the light-curing mold VI is shown.

[0024] Figure 7 A schematic flow chart of the injection molding method provided in an embodiment of the present application.

[0025] Description of main component symbols

[0026] Light-curing mold 100

[0027] First mold 101

[0028] Molding cavity 1011

[0029] First template 10

[0030] Light hole 11

[0031] First mold 20

[0032] Mold body 21

[0033] First connecting hole 211

[0034] Partition 2111

[0035] Second connecting hole 212

[0036] Glue structure 213

[0037] Protruding body 2131

[0038] Depression 2132

[0039] First light-transmitting member 22

[0040] Second light-transmitting member 23

[0041] Through-hole light-transmitting member 30

[0042] Second mold 102

[0043] Second template 40

[0044] Second mold 50

[0045] Flexible parts 60

[0046] Pressing member 70

[0047] Connecting portion 71

[0048] Pressing portion 72

[0049] Workpiece 200

[0050] Colloid 300 DETAILED DESCRIPTION

[0051] In order to more clearly understand the purpose, features and advantages of the present application, the present application is described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that, in the case of no conflict, the embodiments of the present application and the features in the embodiments can be combined with each other. In the following description, many specific details are set forth to facilitate a full understanding of the present application. The embodiments described are only a part of the embodiments of the present application, rather than all of the embodiments.

[0052] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the described features. Throughout the description of this application, "plurality" means two or more, unless otherwise specifically defined.

[0053] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application pertains. The terms used herein in the specification of this application are for the purpose of describing specific embodiments only and are not intended to limit this application. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0054] The embodiments of the present application are further described below with reference to the accompanying drawings.

[0055] See also Figure 1 The embodiment of the present application provides a light-curing mold 100, comprising a first mold 101 and a second mold 102 adapted for opening and closing (opening and closing the mold), see Figure 2 A molding cavity 1011 is formed between the first mold 101 and the second mold 102 .

[0056] See also Figure 2 The first mold 101 includes a first template 10 and a first mold core 20. The first template 10 is provided with a light-transmitting hole 11, which is a through-hole structure. The first mold core 20 includes a mold core body 21, a first light-transmitting member 22 and a second light-transmitting member 23. Figure 3 The mold body 21 is embedded in the first template 10 and is provided with a first connecting hole 211 and a second connecting hole 212 at intervals. The first connecting hole 211 is connected to the light-transmitting hole 11. Figure 4When the mold core body 21 is closed, a glue pulling structure 213 is provided on the side facing the second mold 102. One side of the first light-transmitting component 22 (for example, the side facing away from the second mold 102) is embedded in the first connecting hole 211, and the other side of the first light-transmitting component 22 (for example, the side facing the second mold 102) protrudes out of the first connecting hole 211 and is connected to part of the glue pulling structure 213. When the mold is closed, the first light-transmitting component 22 abuts against the second mold 102 to form a molding cavity 1011, so that the molding cavity 1011 can accommodate the workpiece 200 and receive the molten glue 300. One side of the second light-transmitting member 23 (for example, the side facing away from the second mold 102) is embedded in the second connecting hole 212, and the other side of the second light-transmitting member 23 (for example, the side facing the second mold 102) protrudes out of the second connecting hole 212 and is connected to another part of the glue structure 213 to maintain the sealing of the molding cavity 1011. The first light-transmitting member 22 and the second light-transmitting member 23 are both polytetramethylpentene. When the mold is closed, an external light source is irradiated to the first light-transmitting member 22 and the second light-transmitting member 23 through the light-transmitting hole 11, so that the external light source can solidify the glue 300 to the workpiece 200 through the first light-transmitting member 22 and the second light-transmitting member 23.

[0057] The working process of the above-mentioned light-curing mold 100 is roughly as follows:

[0058] First, molten polytetramethylpentene is molded onto the mold core body 21. Part of the molten polytetramethylpentene is located in the first connection hole 211 and covers a portion of the adhesive structure 213 to form the first light-transmitting member 22. Another portion of the molten polytetramethylpentene is located in the second connection hole 212 and covers another portion of the adhesive structure 213 to form the second light-transmitting member 23. The first light-transmitting member 22 and the second light-transmitting member 23 are supported by the adhesive structure 213 to maintain structural stability, thereby preventing deformation of the first light-transmitting member 22 and the second light-transmitting member 23 after molding. As a result, the mold core body 21, the first light-transmitting member 22, and the second light-transmitting member 23 stably form the first mold core 20.

[0059] Next, the first mold 101 and the second mold 102 are opened, and the workpiece 200 is placed in the molding cavity 1011;

[0060] Then, the first mold 101 and the second mold 102 are closed, and the molten colloid 300 is injected into the molding cavity 1011. Then, an external light source illuminates the colloid through the first light-transmitting member 22 and the second light-transmitting member 23. Utilizing the high light transmittance of polytetramethylpentene, the colloid 300 is quickly cured onto the workpiece 200, thereby reducing the curing time of the colloid 300.

[0061] Finally, the first mold 101 and the second mold 102 are opened to remove the workpiece 200 on which the colloid 300 is cured.

[0062] In this way, by molding molten polytetramethylpentene onto the mold body 21 and covering the glue structure 213 to form the first light-transmitting member 22 and the second light-transmitting member 23, the first light-transmitting member 22 and the second light-transmitting member 23 are fixedly connected to the glue structure 213. The first light-transmitting member 22 and the second light-transmitting member 23 are stably connected to the mold body 21 under the support of the glue structure 213, so that the first light-transmitting member 22 and the second light-transmitting member 23 maintain structural stability after molding, avoiding deformation of the polytetramethylpentene body after molding due to its own high shrinkage rate. Moreover, since the first light-transmitting member 22 and the second light-transmitting member 23 are both polytetramethylpentene bodies, the high transmittance of the light-curing mold 100 is improved by utilizing its high transmittance characteristic, thereby reducing the curing time of the colloid 300 and improving the molding efficiency.

[0063] See also Figure 5 and Figure 6 In some embodiments, the wall of the light-transmitting hole 11 is tapered. By setting the wall of the light-transmitting hole 11 to be tapered, the light-transmitting hole 11 can concentrate light emitted by an external light source to the bottom of the light-transmitting hole 11. This light then passes through the first and second light-transmitting members 22 and 23 to focus on the colloid 300 in the molding cavity 1011, allowing the colloid 300 to quickly solidify on the workpiece 200, thereby improving molding efficiency.

[0064] See also Figure 4 In some embodiments, a spacer 2111 is provided in each of the first connection hole 211 and the second connection hole 212 , and the plurality of spacers 2111 separate the first connection hole 211 and the second connection hole 212 into a plurality of through-hole structures.

[0065] In this way, by setting up multiple spacers 2111, the first connecting hole 211 and the second connecting hole 212 can be separated into several through-hole structures, so that the molten polytetramethylpentene is injected into the several through-hole structures of the first connecting hole 211 and the several through-hole structures of the second connecting hole 212 in turn, so that the first light-transmitting component 22 and the second light-transmitting component 23 are molded in sections onto the mold body 21, thereby reducing the overall shrinkage rate of the first light-transmitting component 22 and the second light-transmitting component 23, avoiding deformation of the first light-transmitting component 22 and the second light-transmitting component 23 after molding, and improving the molding stability.

[0066] In some embodiments, the glue pulling structure 213 includes a plurality of protrusions 2131, which are arranged at intervals on the side of the mold core body 21 facing the second mold 102 when the mold is closed. The protrusions 2131 protrude into the polytetramethylpentene body so that the protrusions 2131 support the polytetramethylpentene body.

[0067] In this way, by providing a plurality of protrusions 2131, when the molten polytetramethylpentene is molded onto the mold core body 21, the plurality of protrusions 2131 protrude into the molded polytetramethylpentene body, so that the plurality of protrusions 2131 cooperate to support the polytetramethylpentene body, thereby preventing the polytetramethylpentene body from being deformed after molding due to the high shrinkage rate of polytetramethylpentene, thereby stably forming the molding cavity 1011 of the first light-transmitting member 22 and the second mold 102, thereby improving the molding stability.

[0068] In some embodiments, the glue pulling structure 213 also includes a plurality of recessed portions 2132, which are spaced apart from the protrusions 2131 on the mold body 21, and a portion of the polytetramethylpentene body is molded in the recessed portions 2132 to connect the first light-transmitting component 22 and the second light-transmitting component 23 to the mold body 21.

[0069] In this way, by setting up multiple recessed portions 2132, part of the polytetramethylpentene body can be molded in the recessed portions 2132 to increase the bonding force between the polytetramethylpentene body and the mold core body 21, thereby preventing the molded polytetramethylpentene body from separating from the mold core body 21, and making the first light-transmitting member 22 and the second light-transmitting member 23 stably connected to the mold core body 21.

[0070] It can be understood that the recessed portion 2132 can be in the shape of a teardrop, an inverted cone, etc., so that the cross-sectional area of ​​the recessed portion 2132 gradually decreases from the direction pointing from the first mold 101 to the second mold 102 when the mold is closed, so that the polytetramethylpentene body molded into the recessed portion 2132 is squeezed by the side wall of the recessed portion 2132, making it difficult for the polytetramethylpentene body to separate from the recessed portion 2132, thereby improving the connection stability between the recessed portion 2132 and the polytetramethylpentene body, and thereby improving the molding stability.

[0071] In some embodiments, a recessed structure (not shown) is provided on the hole wall of the first connection hole 211 and the second connection hole 212. It is understandable that the recessed structure may also be in the shape of a teardrop, an inverted cone, or the like.

[0072] In this way, by providing a recessed structure on the hole walls of the first connecting hole 211 and the second connecting hole 212, the molten polytetramethylpentene can be molded into the recessed structure, so that the polytetramethylpentene body is connected to the hole walls of the first connecting hole 211 and the hole walls of the second connecting hole 212 through the recessed structure, thereby preventing the first light-transmitting member 22 and the second light-transmitting member 23 from being separated from the first connecting hole 211 and the second connecting hole 212 respectively, thereby improving the structural stability of the first mold core 20 and further improving the molding stability.

[0073] In some embodiments, the first connection hole 211 is located outside the second connection hole 212, and the hardness of the first light-transmitting member 22 is greater than the hardness of the second light-transmitting member 23. In this embodiment, the first light-transmitting member 22 is RT18 polytetramethylpentene, and the second light-transmitting member 23 is MX002 polytetramethylpentene. It is understood that the RT18 polytetramethylpentene and MX002 polytetramethylpentene are TPXRT18 and TPXMX002 manufactured by Mitsui Chemicals, Inc. of Japan.

[0074] Both the first light-transmitting member 22 and the second light-transmitting member 23 are formed by molding polytetramethylpentene onto the mold core body 21. However, the polytetramethylpentene used to mold the first light-transmitting member 22 and the second light-transmitting member 23 differs in hardness. Since the first light-transmitting member 22 must abut against the second mold 102 to form the molding cavity 1011 during mold closing, configuring the first light-transmitting member 22 to be made of high-hardness polytetramethylpentene ensures that the first light-transmitting member 22 stably forms the molding cavity 1011, preventing deformation of the first light-transmitting member 22 after molding that could alter the structure of the molding cavity 1011. This ensures that the colloid 300 is stably molded within the molding cavity 1011, improving molding accuracy. In addition, the second light-transmitting member 23 is used to maintain the sealing of the molding cavity 1011 when the mold is closed. By setting the second light-transmitting member 23 to a low-hardness polytetramethylpentene body, the second light-transmitting member 23 stably covers a portion of the workpiece 200, thereby improving the sealing of the second light-transmitting member 23, preventing the colloid 300 from overflowing from the molding cavity 1011, and thereby improving the molding stability.

[0075] See also Figure 6 In some embodiments, the first mold 101 further includes a through-hole light-transmitting member 30 , which is embedded in the light-transmitting hole 11 and is made of polytetramethylpentene to maintain the sealing of the first mold 101 and transmit external light.

[0076] Thus, by providing the through-hole light-transmitting member 30, external debris or oil can be prevented from entering the light-curing mold 100, thereby maintaining the sealing of the first mold 101 and improving molding stability. In addition, by configuring the through-hole light-transmitting member 30 to be polytetramethylpentene, the high light transmittance of polytetramethylpentene can be utilized to enable the through-hole light-transmitting member 30 to maintain the sealing of the first mold 101 while also transmitting light emitted by an external light source to the first light-transmitting member 22 and the second light-transmitting member 23. This allows the colloid 300 to be rapidly cured on the workpiece 200 under the irradiation of external light, thereby improving molding efficiency.

[0077] See also Figure 2In some embodiments, the second mold 102 includes a second mold plate 40 and a second mold core 50. The second mold plate 40 and the first mold plate 10 are arranged opposite each other when the mold is closed, and the second mold core 50 is embedded in the second mold plate 40. The second mold core 50 abuts the first mold plate 10 when the mold is closed to form a molding cavity 1011.

[0078] In this way, by setting the second template 40 and the second mold core 50, when the light-curing mold 100 is closed, since the second template 40 and the first template 10 are open and fit, the second template 40 can stably drive the second mold core 50 to move toward the first mold core 20, so that the second mold core 50 is stably abutted against the first mold core 20 and forms a molding cavity 1011, thereby improving the molding stability.

[0079] See also Figure 6 In some embodiments, the second mold 102 further includes a flexible member 60 , which is embedded in the second mold core 50 and surrounds the molding cavity 1011 to maintain the sealing of the molding cavity 1011 .

[0080] In this way, by setting the flexible part 60 embedded in the second mold core 50 and surrounding the molding cavity 1011, due to the low hardness of the flexible part 60, the flexible part 60 can stably wrap the colloid 300 in the molding cavity 1011, preventing the colloid 300 from overflowing from the molding cavity 1011, so that the flexible part 60 can stably maintain the sealing of the molding cavity 1011, and then the colloid 300 can be stably solidified onto the workpiece 200, thereby improving the molding stability.

[0081] In some embodiments, the flexible member 60 is a silicone rubber.

[0082] Thus, by configuring the flexible member 60 as a silicone body, due to its low hardness, the silicone body stably wraps the colloid 300 and the workpiece 200 within the molding cavity 1011, thereby maintaining the sealing of the molding cavity 1011, preventing the colloid 300 from overflowing from the molding cavity 1011, and improving molding stability. In addition, the first light-transmitting member 22, the second light-transmitting member 23, and the flexible member 60 are all non-metallic, which can prevent the colloid 300 from adhering to the first light-transmitting member 22, the second light-transmitting member 23, and the flexible member 60, thereby facilitating the demolding of the colloid 300 from the molding cavity 1011, further improving molding stability.

[0083] See also Figure 5In some embodiments, the second mold 102 further includes a pressing member 70, one end of which is rotatably connected to the second mold plate 40, and the other end of which presses the first mold plate 10 toward the second mold plate 40 during mold closing. Specifically, the pressing member 70 includes a connecting portion 71 and a pressing portion 72. The connecting portion 71 is rotatably connected to the side wall of the second mold plate 40. The pressing portion 72 is protruding from the side of the connecting portion 71 facing the first mold plate 10 during mold closing and extends in a direction perpendicular to the connecting portion 71. The pressing portion 72 and the connecting portion 71 generally form an L-shaped structure.

[0084] In this way, by providing the pressing member 70, when the light-curing mold 100 is closed, the connecting portion 71 drives the pressing portion 72 to rotate toward the first template 10, so that the pressing portion 72 is driven by the connecting portion 71 to rotate to the upper surface of the first template 10 away from the second template 40 and abuts against the first template 10, so that the pressing portion 72 stably presses the first template 10 to the second template 40, and then makes the first mold core 20 embedded in the first template 10 abut against the second mold core 50 embedded in the second template 40, so as to stably form the molding cavity 1011, improve the sealing of the molding cavity 1011, avoid the colloid 300 from overflowing from the connection between the first mold core 20 and the second mold core 50, and improve the molding stability.

[0085] In some embodiments, there are two pressing members 70, each rotatably connected to opposite side walls of the second mold plate 40. Thus, by providing two pressing members 70, the two pressing members 70 can abut against different positions on the upper surface of the first mold plate 10 facing away from the second mold plate 40. This allows the two pressing members 70 to cooperate and stably press the first mold plate 10 against the second mold plate 40 during mold closing, further improving molding stability.

[0086] See also Figure 7 The embodiment of the present application further provides an injection molding method, which is applied to the above-mentioned light-curing mold 100, and the injection molding method includes:

[0087] In step S1 , molten polytetramethylpentene is formed in sections onto the mold body 21 and covered with the adhesive structure 213 to form a first light-transmitting member 22 and a second light-transmitting member 23 . The first light-transmitting member 22 and the second light-transmitting member 23 are fixedly connected to the mold body 21 via the adhesive structure 213 .

[0088] Specifically, molten polytetramethylpentene is injected into several through-hole structures of the first connecting hole 211 and several through-hole structures of the second connecting hole 212 in sequence, so that the first light-transmitting member 22 and the second light-transmitting member 23 are molded in sections onto the mold body 21, thereby reducing the overall shrinkage rate of the first light-transmitting member 22 and the second light-transmitting member 23, avoiding deformation of the first light-transmitting member 22 and the second light-transmitting member 23 after molding, and improving molding stability.

[0089] In addition, the side of the first light-transmitting member 22 protruding from the first connecting hole 211 and the side of the second light-transmitting member 23 protruding from the second connecting hole 212 are both connected to the glue structure 213, so that the first light-transmitting member 22 and the second light-transmitting member 23 can be stably connected to the mold body 21 under the support of the glue structure 213, so that the first light-transmitting member 22 and the second light-transmitting member 23 maintain structural stability after molding, avoiding deformation of the polytetramethylpentene body after molding due to its high shrinkage rate, and further improving the molding stability.

[0090] In step S2 , the first mold 101 and the second mold 102 are opened to place the workpiece 200 into the molding cavity 1011 .

[0091] Specifically, the first mold 101 and the second mold 102 are arranged opposite to each other and opened and matched. The first mold 101 and the second mold 102 move away from each other when the molds are opened, so that a material taking and placing space is formed between the first mold 101 and the second mold 102, which is convenient for placing the workpiece 200 in the molding cavity 1011 and preventing the workpiece 200 from interfering with other components.

[0092] In step S3 , the first mold 101 and the second mold 102 are closed to inject the molten colloid 300 into the molding cavity 1011 .

[0093] Specifically, when injecting the colloid 300 into the molding cavity 1011, the molten colloid 300 needs to be injected into the molding cavity 1011 through an external injection machine. In order to improve the injection efficiency, a double-shot injection machine can be used to simultaneously inject two groups of colloids 300 into the molding cavity 1011, thereby reducing the overall process time for the colloid 300 to solidify into the workpiece 200, thereby improving the molding efficiency.

[0094] In step S4 , an external light source is used to illuminate the colloid through the first light-transmitting member 22 and the second light-transmitting member 23 to solidify the colloid 300 onto the workpiece 200 .

[0095] Specifically, since the first light-transmitting member 22 and the second light-transmitting member 23 are both polytetramethylpentene, the first light-transmitting member 22 and the second light-transmitting member 23 utilize the high transmittance of polytetramethylpentene, so that most of the light emitted by the external light source is transmitted through the first light-transmitting member 22 and the second light-transmitting member 23 to the colloid 300 in the molding cavity 1011, so that the colloid 300 is quickly solidified onto the workpiece 200, reducing the curing time of the colloid 300, thereby improving the molding efficiency.

[0096] In step S5 , the first mold 101 and the second mold 102 are opened to remove the workpiece 200 on which the colloid 300 is solidified.

[0097] Specifically, the first mold 101 and the second mold 102 are opened and matched, and the first mold 101 and the second mold 102 move in opposite directions when the molds are opened, so that a material taking and releasing space is formed between the first mold 101 and the second mold 102, which is convenient for the operator or the robot to take out the workpiece 200 with the colloid 300 solidified from the molding cavity 1011.

[0098] The above-mentioned light-curing mold 100 and injection molding method form the first light-transmitting member 22 and the second light-transmitting member 23 by molding molten polytetramethylpentene onto the mold body 21 and covering the glue structure 213, so that the first light-transmitting member 22 and the second light-transmitting member 23 are fixedly connected to the glue structure 213. The first light-transmitting member 22 and the second light-transmitting member 23 are stably connected to the mold body 21 under the support of the glue structure 213, so that the first light-transmitting member 22 and the second light-transmitting member 23 maintain structural stability after molding, avoiding deformation of the polytetramethylpentene body due to its high shrinkage rate after molding. Since the first light-transmitting member 22 and the second light-transmitting member 23 are both polytetramethylpentene bodies, the high transmittance of the light-curing mold 100 is improved by utilizing its high transmittance, thereby reducing the curing time of the colloid 300 and improving the molding efficiency.

[0099] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not limiting. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention.

Claims

1. A light-curing mold, comprising a first mold and a second mold adapted to be opened and matched, wherein a molding cavity can be formed between the first mold and the second mold, characterized in that: The first mold comprises: The first template is provided with a light-transmitting hole; The first mold includes: A mold core body is embedded in the first template and is provided with a first connecting hole and a second connecting hole at intervals, the first connecting hole being in communication with the light-transmitting hole, and a glue pulling structure is provided on a side of the mold core body facing the second mold when the mold is closed, the glue pulling structure comprising a plurality of protrusions arranged at intervals on a side of the mold core body facing the second mold when the mold is closed; a first light-transmitting member, embedded in the first connecting hole and connected to a portion of the glue-pulling structure; the first light-transmitting member abuts against the second mold to form the molding cavity when the mold is closed, so that the molding cavity accommodates the workpiece and receives the molten glue; The second light-transmitting member is embedded in the second connecting hole and connected to another part of the glue-pulling structure to maintain the sealing of the molding cavity. The first light-transmitting member and the second light-transmitting member are both polytetramethylpentene bodies. The protrusion protrudes into the polytetramethylpentene body so that the protrusion supports the polytetramethylpentene body. When the mold is closed, an external light source is irradiated to the first light-transmitting member and the second light-transmitting member through the light-transmitting hole, so that the external light source solidifies the colloid onto the workpiece through the first light-transmitting member and the second light-transmitting member.

2. The light-curing mold according to claim 1, wherein: The glue pulling structure also includes: A plurality of recessed portions are arranged on the mold body at intervals from the protruding body, and part of the polytetramethylpentene body is molded in the recessed portions so that the first light-transmitting member and the second light-transmitting member are connected to the mold body, wherein each of the recessed portions is in the shape of a teardrop or an inverted cone.

3. The light-curing mold according to claim 1, wherein: The first connection hole is located outside the second connection hole, and the hardness of the first light-transmitting member is greater than that of the second light-transmitting member.

4. The light-curing mold according to claim 1, wherein: The first mold further includes: A through-hole light-transmitting member is embedded in the light-transmitting hole and is made of polytetramethylpentene, and is used to maintain the sealing of the first mold and transmit external light, wherein the hole wall of the light-transmitting hole is set to be tapered.

5. The light-curing mold according to claim 1, wherein: A material partition is provided in each of the first connection hole and the second connection hole. The material partition is used to separate the first connection hole and the second connection hole into a plurality of through-hole structures.

6. The light-curing mold according to claim 1 or 5, characterized in that: The hole walls of the first connecting hole and the second connecting hole are both provided with a water drop-shaped or inverted cone-shaped recessed structure.

7. The light-curing mold according to claim 1, wherein: The second mold comprises: a second template, arranged opposite to the first template when the mold is closed; The second mold core is embedded in the second mold plate, and the second mold core abuts against the first mold plate to form the molding cavity when the mold is closed.

8. The light-curing mold according to claim 7, wherein: The second mold further includes: The flexible member is embedded in the second mold core and surrounds the molding cavity to maintain the sealing performance of the molding cavity.

9. The light-curing mold according to claim 8, wherein: The flexible member is a silicone body.

10. The light-curing mold according to claim 7, wherein: The second mold further includes: A pressing member, one end of which is rotatably connected to the second template, and the other end of which presses the first template toward the second template when the mold is closed.

11. An injection molding method, applied to the light-curing mold according to any one of claims 1 to 10, characterized in that: The injection molding method comprises: Molten polytetramethylpentene is formed in sections onto the mold body and covered with a glue structure to form a first light-transmitting member and a second light-transmitting member, wherein the first light-transmitting member and the second light-transmitting member are fixedly connected to the mold body via the glue structure; Opening the first mold and the second mold to place the workpiece into the molding cavity; closing the first mold and the second mold to inject molten colloid into the molding cavity; allowing an external light source to illuminate the colloid through the first light-transmitting member and the second light-transmitting member to solidify the colloid onto the workpiece; The first mold and the second mold are opened to take out the workpiece on which the colloid is solidified.

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