Automobile instrument frame injection mold and injection molding method thereof

Abstract

The invention relates to the technical field of injection molds, in particular to an automobile instrument frame injection mold and an injection molding method thereof. Comprising an upper die base and a lower die base which are movably installed together, and an upper die core of the upper die base and a lower die core of the lower die base can be assembled to form a forming cavity; the upper mold core is provided with a texture forming part, the lower mold base is provided with an ejection plate capable of moving up and down, the ejection plate is pivoted with a plurality of ejection inserts, and the tops of the ejection inserts can stretch out and draw back in the forming cavity and are matched with the forming cavity to form a buckling part of the instrument frame through injection molding; the upper die base is provided with a buckling mechanism which can be connected with or disconnected from the ejector plate in a buckling mode. Compared with the prior art, when the instrument frame and the lower mold core are demolded, the upper mold base and the ejection insert synchronously move to clamp the instrument frame for demolding, so that the problem of ejection damage is avoided, and the production yield of the instrument frame is further improved; meanwhile, the problem that patterns on the surface of the instrument frame are scratched due to the fact that the instrument frame is separated from the upper mold core can be avoided, and the production yield is increased.

Description

Technical Field

[0001] The invention relates to the technical field of automobile product injection molds, in particular to an automobile instrument frame injection mold and an injection molding method thereof. Background Art

[0002] Injection molds are tools for producing plastic products, and they are also tools for giving plastic products complete structures and precise dimensions. Injection molding is a processing method used in mass production of certain parts with complex shapes. Specifically, it refers to the process of injecting heated and melted plastic into the mold cavity under high pressure by an injection molding machine, and then cooling and solidifying to obtain a molded product.

[0003] Injection molds usually include an upper mold, a lower mold, an upper mold core on the upper mold, and a lower mold core on the lower mold core, and the upper mold core and the lower mold core are matched to complete the injection molded product. Specifically, in the field of automotive products, automotive accessories are usually injection molded using injection molds; for example, automotive instrument frames, automotive center console frames, etc.

[0004] Please also read Figure 1 , is the specific structure of the automobile instrument frame 1000 in the prior art; the automobile instrument frame 1000 is an inverted "L" shaped structure as a whole, and a plurality of buckles 1002 for subsequent buckling and assembly with the central control housing are provided on the inner side 1001 of the automobile instrument frame 1000, and patterns are usually provided on the outer surface 1003 of the automobile instrument frame 1000 according to actual production needs. This automobile instrument frame 1000 is usually firstly molded into the entire automobile instrument frame 1000 and the buckle position by injection molding, and then the outer surface of the automobile instrument frame 1000 is knurled by using a CNC machining center, and finally the outer surface of the automobile instrument frame 1000 is polished and deburred to complete the processing of an automobile instrument frame 1000.

[0005] In the prior art, the injection mold used for injection molding the automobile instrument frame 1000 usually uses an upper mold and a lower mold to open the mold, and then uses a ejector to eject the automobile instrument frame 1000 from the lower mold to complete the demolding; and such a demolding method is easy to damage the automobile instrument frame 1000 for some thinner automobile instrument frames 1000, which shows that its production yield is not high; at the same time, due to the influence of the mold opening action, the injection molding of the pattern cannot be completed in the injection mold, and the pattern can only be processed by CNC later, which results in a long processing time for the automobile instrument frame 1000, seriously limiting the production efficiency.

[0006] Therefore, it is necessary to study a new technical solution to solve the above problems. Summary of the invention

[0007] In view of this, the present invention aims at the deficiencies in the prior art, and its main purpose is to provide an injection mold for an automobile instrument frame, which effectively solves the technical defects of low production yield and production efficiency in the injection molding of automobile instrument frames in the prior art.

[0008] To achieve the above object, the present invention adopts the following technical solution: an automobile instrument frame injection mold, comprising an upper mold base and a lower mold base that are movably installed together, the upper mold base is provided with an upper mold core, and the lower mold base is provided with a lower mold core; the upper mold core and the lower mold core are molded together to enclose a molding chamber for injection molding the instrument frame; The upper mold core is provided with a texture molding part for injection molding the instrument frame pattern, and the lower mold base is provided with an ejector plate which can move up and down. The ejector plate is pivotally connected with multiple ejector inserts. The top of the ejector insert can be telescoped in the molding chamber and cooperate with the molding chamber to injection mold the buckle part of the instrument frame; the upper mold base is provided with a buckling mechanism which can be buckled and connected or disconnected with the ejector plate.

[0009] As a preferred solution: the lower mold core is provided with first through holes equal in number to the ejection inserts, the bottom of the first through holes is provided with a first notch penetrating the outer side surface of the lower mold core, and the first notch is installed with a first base; The ejector insert can extend into or exit the molding chamber through the first through hole. When the ejector insert moves upward and extends into the molding chamber, the first base can act on the ejector insert to swing inward.

[0010] As a preferred solution: a first inclined surface is provided on a side of the first base facing the first through hole, and the first inclined surface is inclined from bottom to top toward the center direction of the first through hole; A second inclined surface is provided on one side of the ejection insert facing the first base. When the ejection insert moves upward, the top of the first inclined surface can abut against the second inclined surface and cause the ejection insert to swing inward.

[0011] As a preferred solution: the inward inclination angle of the first inclined surface is greater than the inward inclination angle of the second inclined surface; The second inclined surface includes a first inclined surface section and a second inclined surface section arranged up and down. When the top of the first inclined surface abuts against the bottom of the first inclined surface section, the ejector insert can be swung inwardly at a first angle. When the top of the first inclined surface abuts against the bottom of the second inclined surface section, the ejector insert can be swung inwardly at a second angle.

[0012] As a preferred solution: after the lower die seat moves up for the first stroke, the snap-fit ​​mechanism can pull the ejector plate to move up synchronously so that the ejector insert pushes the instrument frame away from the lower die core; After the lower die seat moves up by the second stroke, the snap-fit ​​mechanism can pull the ejector plate to move up synchronously so that the ejector insert swings inwardly to a first angle to provide an inward pulling force for the instrument frame; When the lower die base moves up for the third stroke, the snap-fit ​​mechanism is disconnected from the ejection plate and the instrument frame is separated from the upper die core; When the ejector plate moves up to the fourth stroke, the ejector insert can move up synchronously and swing inwards by a second angle and be disengaged from the instrument frame.

[0013] As a preferred solution: the release mechanism includes a first buckle arm fixedly installed on the upper mold base and extending downward, and a first buckle block that can move inward and outward and is installed on the ejection plate. A first buckle notch is provided on the side of the first buckle arm facing the first buckle block, and the first buckle block can be inserted into the first buckle notch after moving outward.

[0014] As a preferred solution: a first guiding inclined surface is provided at the bottom of the first buckle block, and the first guiding inclined surface is inclined upward from the inside to the outside; A second guiding slope adapted to the first guiding slope is provided at the bottom of the first engaging notch. When the upper mold base is disconnected from the ejection plate, the first buckle arm can act on the first buckle block to move inward to complete the separation.

[0015] As a preferred solution: the upper mold base is provided with a glue inlet, which is connected to the molding chamber through a flow channel; and the upper mold base is provided with a steam heating system.

[0016] The beneficial effects of the automobile instrument frame injection mold provided by the present application are: when performing the mold opening operation, after the upper mold base moves up by the first stroke relative to the lower mold base, the snap-fit ​​mechanism can pull the ejector plate to synchronously move so that the instrument frame and the lower mold core are demolded; after the upper mold base moves up by the second stroke relative to the lower mold base, the snap-fit ​​mechanism can pull the ejector plate to synchronously move so that the ejector insert swings inwardly by the first angle to provide the inward pulling force on the instrument frame; after the upper mold base moves up by the third stroke relative to the lower mold base, the snap-fit ​​mechanism can disengage the ejector plate and demold the instrument frame and the upper mold core; when the ejector plate moves up by the fourth stroke, the ejector insert can swing inwardly by the second angle to disengage the instrument frame from the ejector insert.

[0017] Compared with the prior art, in the first aspect, the buckling mechanism is provided, so that when the instrument frame is demoulded from the lower mold core, the upper mold base and the ejection insert can be synchronously moved to clamp the instrument frame, which can effectively avoid the problem of damaging the instrument frame after the instrument frame is ejected from the lower mold core only by the ejector pin, thereby further improving the production yield of the instrument frame; Secondly, by means of the provided snap-fit ​​mechanism, the upper die seat can provide an inward pulling force to the instrument frame during the second and third strokes of the displacement of the upper die seat relative to the lower die seat, and then separate from the upper die core; such a structure can prevent the instrument frame from scratching the pattern on the surface of the instrument frame during the separation from the upper die core, thereby improving the production yield of the instrument frame; Thirdly, the cleverly designed snap-fit ​​mechanism allows the injection mold to complete the demoulding operation of the instrument frame with multiple upward strokes. The injection molding and pattern molding of the instrument frame can be completed in one set of injection mold without scratching the pattern. It can not only improve the molding yield of the instrument frame, but also improve the production efficiency of the instrument frame.

[0018] The present application also provides an injection molding method of an automobile instrument frame injection molding mold, including an automobile instrument frame injection molding mold.

[0019] As a preferred solution: the injection molding method includes Step 1, provide an injection molding machine to install an upper mold base and a lower mold base; Step 2, start the injection molding machine to drive the upper mold seat to move relative to the lower mold seat, so that the upper mold core and the lower mold core are molded together, and then the hot melt slurry is injected into the molding chamber through the glue inlet; and wait for 20 seconds to 60 seconds of cooling time to form the instrument frame; Step 3, start the injection molding machine to drive the upper mold base to move up the first stroke relative to the lower mold base, and synchronously drive the ejector plate to move up through the snap-fit ​​mechanism; the ejector insert and the upper mold core clamp the instrument frame and move up synchronously, so that the instrument frame and the lower mold core are demolded; Step 4, start the injection molding machine to drive the upper mold base to move up a second stroke relative to the lower mold base, and synchronously drive the ejector plate to move up through the locking mechanism; when the ejector insert moves up synchronously, it swings inwardly by a first angle to provide an inward pulling force for the instrument frame; Step 5, start the injection molding machine to drive the upper mold base to move up a third stroke relative to the lower mold base, and at the same time, the fastening mechanism is disengaged from the ejection plate, so that the instrument frame is demoulded from the upper mold core; Step 6, start the injection molding machine to drive the ejector plate to move up to the fourth stroke, and the ejector insert moves up synchronously and swings inward by a second angle, so that the instrument frame and the ejector insert are completely disengaged; Step 7, repeat steps 2-6, continue injection molding the instrument frame and demold the instrument frame.

[0020] The injection molding method of the automobile instrument frame injection mold provided by the present application has the beneficial effects that: compared with the prior art, when performing the mold opening operation, after the upper mold base moves up by the first stroke relative to the lower mold base, the snap-fit ​​mechanism can pull the ejector plate to move synchronously so that the instrument frame and the lower mold core are demolded; after the upper mold base moves up by the second stroke relative to the lower mold base, the snap-fit ​​mechanism can pull the ejector plate to move synchronously so that the ejector insert swings inwardly by the first angle to be the inward pulling force of the instrument frame; after the upper mold base moves up by the third stroke relative to the lower mold base, the snap-fit ​​mechanism can disengage the ejector plate and demold the instrument frame and the upper mold core; when the ejector plate moves up by the fourth stroke, the ejector insert can swing inwardly by the second angle so that the instrument frame and the ejector insert are disengaged; With such a structure, when the instrument frame is demoulded from the lower mold core, the upper mold base and the ejector insert move synchronously to clamp the instrument frame, which can effectively avoid the problem of damaging the instrument frame after the instrument frame is ejected from the lower mold core by the ejector alone, thereby further improving the production yield of the instrument frame; Secondly, during the second and third strokes of the upper die seat relative to the lower die seat, the upper die seat provides an inward pulling force to the instrument frame and then separates from the upper die core; such a structure can prevent the instrument frame from scratching the pattern on the surface of the instrument frame during the process of separating from the upper die core, thereby improving the production yield of the instrument frame; Moreover, the injection mold uses four upward strokes to cooperate with the demoulding operation of the instrument frame. The injection molding and pattern molding of the instrument frame can be completed in one set of injection mold without scratching the pattern. It can not only improve the molding yield of the instrument frame, but also improve the production efficiency of the instrument frame. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0022] Figure 1 It is a schematic diagram of the three-dimensional structure of the unprocessed texture of the automobile instrument frame in the prior art; Figure 2 It is a schematic diagram of the three-dimensional structure of the automobile instrument frame injection mold provided in an embodiment of the present application; Figure 3 yes Figure 2 The AA section view of the injection mold of the automobile instrument frame shown; Figure 4 yes Figure 3 The enlarged view of point A of the injection mold of the automobile instrument frame shown; Figure 5 yes Figure 4 The enlarged view of point B of the injection mold of the automobile instrument frame shown; Figure 6 yes Figure 2 The cross-sectional view at BB of the injection mold of the automobile instrument frame shown; Figure 7 yes Figure 6 The enlarged view of the C position of the injection mold of the automobile instrument frame shown; Figure 8 yes Figure 2 A detailed cross-sectional view of the ejector insert, the lower mold core and the first base in the injection mold of the automobile instrument frame shown; Fig. 9yes Figure 2 The partial structural sectional view of the automobile instrument frame injection mold during the first upward movement shown; Fig.10 yes Figure 2 The partial structural sectional view of the automobile instrument frame injection mold moving up to the second stroke shown; Fig.11 yes Fig.10 The enlarged view of point D in the injection mold of the automobile instrument frame shown; Fig.12 yes Figure 2 The partial structural sectional view of the automobile instrument frame injection mold moving up to the third stroke shown; Fig.13 yes Figure 2 The partial structural sectional view of the injection mold of the automobile instrument frame shown in the fourth upward stroke; Fig.14 yes Fig.13 The enlarged view of point E in the injection mold of the automobile instrument frame shown; Fig.15 yes Figure 8 A cross-sectional view of the specific structure of the ejector insert shown; Fig.16 yes Figure 2 The three-dimensional structural schematic diagram of the instrument frame injection molded by the automobile instrument frame injection mold is shown.

[0023] Among them, the reference numerals in the figure are: 1000, automobile instrument frame; 1001, inner side; 1002, buckle; 1003, outer surface; 10. Injection mold for automobile instrument frame; 11. Upper mold base; 111. Upper mold core; 112. Texture molding part; 12. Lower mold base; 121. Lower mold core; 1211. First through hole; 1212. First notch; 122. Ejector plate; 1221. First window; 123. Ejector insert; 1230. Center line; 1231. First slope section; 1232. Second slope section; 1233. Extension rod; 1234. First pivoting protrusion; 1235. First pivoting seat; 1236. Pin; 1237. Rotating Moving seat; 1238, avoidance gap; 124, first base; 1241, first inclined plane; 1242, top position; 13, molding chamber; 14, buckling mechanism; 141, first buckling arm; 1411, first buckling gap; 1412, second guide inclined plane; 1413, fourth guide inclined plane; 142, first buckle block; 1421, first guide inclined plane; 1422, third guide inclined plane; 143, first guide plate; 1431, first through groove; 15, glue inlet; 16, steam heating system; 17, oil cylinder; a1, first angle; a2, second angle; x1, first stroke; x2, second stroke; x3, third stroke; x4, fourth stroke; 100. Instrument frame; 101. Buckle; 102. Pattern. DETAILED DESCRIPTION

[0024] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0025] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0026] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0027] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0028] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments.

[0029] Before explaining the embodiments of the present application in detail, the application scenarios of the embodiments of the present application are first described.

[0030] Please also read Figure 1, which is a specific structure of the automobile instrument frame in the prior art; the automobile instrument frame 1000 is an inverted "L" shaped structure as a whole, and a plurality of buckles 1002 for subsequent buckling and assembly with the central control shell are provided on the inner side 1001 of the automobile instrument frame 1000, and patterns are usually provided on the outer surface 1003 of the automobile instrument frame 1000 according to actual production needs. This automobile instrument frame 1000 is usually first molded into the entire automobile instrument frame 1000 and the buckle position by injection molding, and then the outer surface of the automobile instrument frame 1000 is knurled by using a CNC machining center, and finally the outer surface of the automobile instrument frame 1000 is polished and deburred to complete the processing of an automobile instrument frame 1000.

[0031] The inventors found in actual production operations that this type of automobile instrument frame 1000 has the following defects during the manufacturing process: First, during the mold opening process of the injection mold, the upper mold base is usually moved first to demold the upper mold core and the automobile instrument frame 1000, and then the automobile instrument frame 1000 is ejected by an ejector to complete the mold opening of the automobile instrument frame 1000 and the lower mold core; however, due to the overall thin thickness of the automobile instrument frame 1000, the automobile instrument frame 1000 is easily damaged when only the ejector is used for ejection, which seriously limits the production yield of the automobile instrument frame 1000; Second, due to the influence of the mold opening action, the injection molding of the pattern cannot be completed in the injection mold, and the pattern can only be processed by CNC afterwards, which causes the processing of the automobile instrument frame 1000 to be time-consuming and seriously limits the production efficiency.

[0032] In view of this, the inventors developed a new injection mold for an automobile instrument frame to solve the technical defects of low production yield and low production efficiency in the injection mold for injection molding automobile instrument frames in the prior art.

[0033] Please also read Figures 2 to 16 Now, the injection mold 10 of the automobile instrument frame 100 provided in the embodiment of the present application is described. The injection mold 10 of the automobile instrument frame 100 comprises: an upper mold base 11, a lower mold base 12 and a buckling mechanism.

[0034] The upper mold base 11 and the lower mold base 12 can be moved and installed together. The upper mold base 11 is provided with an upper mold core 111, and the lower mold base 12 is provided with a lower mold core 121; the upper mold core 111 and the lower mold core 121 are molded together to form a molding chamber 13 for injection molding an automobile instrument frame 100; the upper mold core 111 is provided with a texture molding part 112 for injection molding a pattern of the automobile instrument frame 100, and the lower mold base 12 is provided with an ejector plate 122 that can move up and down, and the ejector plate 122 is pivotally connected with a plurality of ejector inserts 123, and the top of the ejector insert 123 can be retracted in the molding chamber 13 and cooperate with the molding chamber 13 to injection mold the buckle part 101 of the instrument frame 100; the upper mold base 11 is provided with a buckling mechanism 14, which can be buckled and connected or disconnected with the ejector plate 122.

[0035] It should be noted that the texture forming portion 112 covers the surface of the upper mold core 111 facing the forming cavity 13 .

[0036] Please also read Figure 8 , Figures 9 to 14 The lower mold core 121 is provided with first through holes 1211, the number of which is equal to that of the ejector insert 123. The bottom of the first through holes 1211 is provided with a first notch 1212 penetrating the outer side surface of the lower mold core 121. The first notch 1212 is installed with a first base 124. The ejector insert 123 can extend into or exit the molding chamber 13 through the first through holes 1211. When the ejector insert 123 moves upward and extends into the molding chamber 13, the first base 124 can act on the ejector insert 123 to swing inward.

[0037] In some embodiments of the present application, the first through hole 1211 is a square hole, and the cross-section of the ejector insert 123 is also a square column structure, which can be adapted to be installed in the square hole; the size of the first through hole 1211 is larger than the size of the ejector insert 123, so that the ejector insert 123 can move up and down and swing in the first through hole 1211.

[0038] Specifically, a first inclined surface 1241 is provided on the side of the first base 124 facing the first through hole 1211, and the first inclined surface is inclined from the bottom 1241 to the top toward the center direction of the first through hole 1211; a second inclined surface is provided on the side of the ejection insert 123 facing the first base 124, and when the ejection insert 123 moves upward, the top of the first inclined surface 1241 can abut against the second inclined surface and cause the ejection insert 123 to swing inward.

[0039] More specifically, the inward inclination angle of the first bevel 1241 is greater than the inward inclination angle of the second bevel; the second bevel includes a first bevel section 1231 and a second bevel section 1232 arranged up and down. When the top of the first bevel 1241 abuts against the bottom of the first bevel section 1231, it can act to eject the insert 123 to swing inward at a first angle a1, and when the top of the first bevel 1241 abuts against the bottom of the second bevel section 1232, it can act to eject the insert 123 to swing inward at a second angle a2.

[0040] Preferably, the inclination angle of the first bevel is 4 to 6 degrees, and the inclination angle of the second bevel is 1 to 3 degrees; with such a structure, during the upward movement of the ejection insert 123, the top position 1242 of the first bevel 1241 can selectively abut against the first bevel segment 1231 or the second bevel segment 1232; when abutting against the first bevel segment 1231, the ejection insert 123 can be caused to swing inwardly by a first angle; when abutting against the second bevel segment 1232, the ejection insert 123 can be caused to swing inwardly by a second angle.

[0041] It can be understood that, since the ejection insert 123 can swing inward when moving upward, the ejection insert 123 is provided with an avoidance notch 1238 on the side facing away from the second inclined surface. With the help of the setting of the avoidance notch 1238, the ejection insert 123 can make way when swinging; and when the ejection insert 123 is not ejected, the top of the ejection insert 123 can completely cover the first through hole 1211 to participate in the injection molding of the instrument frame 100, that is, the functions of the ejection insert 123 include injection molding the instrument frame 100 and ejecting the instrument frame 100.

[0042] Furthermore, after the lower mold base 12 moves up the first stroke x1, the snap-fitting mechanism 14 can pull the ejector plate 122 to move up synchronously so that the ejector insert 123 pushes the instrument frame 100 out of the lower mold core 121; after the lower mold base 12 moves up the second stroke x2, the snap-fitting mechanism 14 can pull the ejector plate 122 to move up synchronously so that the ejector insert 123 swings inwardly at the first angle a1 to provide an inward pulling force for the instrument frame 100; after the lower mold base 12 moves up the third stroke x3, the snap-fitting mechanism 14 disengages from the ejector plate 122 and disengages the instrument frame 100 from the upper mold core 111; when the ejector plate 122 moves up the fourth stroke x4, the ejector insert 123 can move up synchronously and swing inwardly at the second angle a2 and disengage from the instrument frame 100.

[0043] It can be understood that the first bevel section 1231 and the second bevel section 1232 are two bevel sections separated by the center line 1230 in the up and down direction of the second bevel; when the top position 1242 of the first bevel 1241 gradually switches from abutting against the top of the first bevel section 1231 to abutting against the bottom of the first bevel section 1231, the first angle of the overall swing of the ejector insert 123 will swing from 0 degrees to 2 degrees, thereby gradually providing an inward pulling force for the instrument frame 100; when the top position 1242 of the first bevel 1241 gradually switches from abutting against the top of the second bevel section 1232 to abutting against the bottom of the second bevel section 1232, the overall swing angle of the ejector insert 123 continues to swing inward to 5 degrees on the basis of 2 degrees, thereby completing the release operation of the instrument frame 100.

[0044] Please also read Fig.15 In some other embodiments of the present application, the ejection insert 123 is pivotally connected to an extension rod 1233 at the bottom, and the extension rod 1233 is pivotally connected to a rotating seat 1237 at the bottom, and the rotating seat 1237 is fixedly installed on the ejection plate 122; such a structure allows the ejection insert 123 to move up synchronously and be swingably set during the upward movement of the ejection plate 122.

[0045] Specifically, the bottom of the ejector insert 123 is provided with a first pivoting protrusion 1234, the top of the extension rod 1233 is provided with a first pivoting seat 1235, and both the first pivoting protrusion 1234 and the first pivoting seat 1235 are provided with through holes; the pin 1236 is inserted into the through hole to complete the connection between the ejector insert 123 and the extension rod 1233. If it is necessary to replace the ejector insert 123 with a different size later, the ejector insert 123 can be moved up after the pin 1236 is removed and taken out from the first through hole 1211.

[0046] At the same time, the first base 124 is fixedly installed in the first notch 1212 using screws; with such a structure, different first bases 124 and ejection inserts 123 can be replaced in the same set of injection molds to cooperate with the ejection of instrument frames 100 of different sizes, thereby improving the versatility of the injection mold.

[0047] Please also read Figure 5 , Figures 9 to 13 In some embodiments of the present application, the release mechanism 14 includes a first buckle arm 141 fixedly installed on the upper mold base 11 and extending downward, and a first buckle block 142 that can be moved inward and outward and installed on the ejection plate 122. A first buckle notch 1411 is provided on the side of the first buckle arm 141 facing the first buckle block 142, and the first buckle block 142 can be inserted into the first buckle notch 1411 after moving outward.

[0048] Specifically, a first guiding slope 1421 is provided at the bottom of the first buckle block 142, and the first guiding slope 1421 is inclined upward from the inside to the outside; a second guiding slope 1412 adapted to the first guiding slope 1421 is provided at the bottom of the first buckling notch 1411, and when the upper mold base 11 is disconnected from the ejection plate 122, the first buckle arm 141 can act on the first buckle block 142 to move inward to complete the disconnection. A third guiding slope 1422 is provided on the outside of the top of the first buckle block 142, and the third guiding slope 1422 is inclined upward from the outside to the inside; a fourth guiding slope 1413 adapted to the third guiding slope 1422 is provided on the side of the bottom of the first buckle arm 141 facing the first buckle block 142.

[0049] Preferably, the lower mold base 12 is installed with a first guide plate 143, which is located on the outer side of the first buckle block 142 and covers the first buckle block 142. The first guide plate 143 is provided with a first through groove 1431 that runs through its upper surface and inner side surface. When the first buckle arm 141 needs to be buckled and connected with the first buckle block 142; the upper mold base 11 moves downward relative to the lower mold base 12, so that the first buckle arm 141 is inserted into the first through groove 1431; as the upper mold base 11 continues to move downward relative to the lower mold base 12, first the third guide bevel 1422 and the fourth guide bevel 1413 abut against each other, and the downward movement of the first buckle arm 141 can cause the first buckle block 142 to move inward through the mutual abutment between the third guide bevel 1422 and the fourth guide bevel 1413; when the first buckle arm 141 moves down into place, the first buckle block 142 moves outward and is inserted into the first buckling notch 1411.

[0050] In more detail, a first window 1221 is provided on the outer side of the ejection plate 122, and the first buckle block 142 is movably installed in the first window 1221. An elastic member is provided between the first buckle block 142 and the inner side surface of the first window 1221. With the help of the elastic member, the first buckle block 142 can be continuously moved outward to allow the first buckle arm 141 to move down into place and then the first buckle block 142 can be inserted into the first buckling notch 1411 autonomously.

[0051] Preferably, a cylinder 17 is installed at the four corners of the bottom of the upper mold base 11, and the telescopic rod of the cylinder 17 can be against the ejector plate 122; when the upper mold base 11 and the lower mold base 12 are re-closed, the ejector plate 122 can be driven downward by the cylinder 17 to ensure that the ejector plate 122 is reset and the first buckle block 142 is buckled into the first buckle notch 1411, thereby improving the reliability of the injection mold for continuous injection molding.

[0052] Please also read Figures 2 to 3The upper mold base 11 is provided with a glue inlet 15, and the glue inlet 15 is connected to the molding chamber 13 through a flow channel; the upper mold base 11 is provided with a steam heating system 16, and the steam heating system 16 can be used to preheat the injection mold to improve the smoothness of the hot melt slurry being injected into the molding chamber 13.

[0053] In addition, one of the upper mold base 11 and the lower mold base 12 is provided with a guide column, and the other is provided with a guide hole for inserting the guide column. The arrangement of the guide column and the guide hole can ensure that the upper mold base 11 can only move linearly upward or downward relative to the lower mold base 12. These limiting structures are conventional design means for technicians in this field and will not be described one by one here.

[0054] Please also read Figures 2 to 14 The present application also provides an injection molding method of an automobile instrument frame 100 injection mold 10 , and the injection molding method of the automobile instrument frame 100 injection mold 10 adopts the above-mentioned automobile instrument frame 100 injection mold 10 .

[0055] Specifically, the injection molding method includes Step 1, providing an injection molding machine to install an upper mold base 11 and a lower mold base 12; Step 2, start the injection molding machine to drive the upper mold base 11 to move relative to the lower mold base 12, so that the upper mold core 111 and the lower mold core 121 are molded together, and then the hot melt slurry is injected into the molding chamber 13 through the glue inlet 15; and wait for 20 seconds to 60 seconds of cooling time to mold the instrument frame 100; Step 3, start the injection molding machine to drive the upper mold base 11 to move up the first stroke x1 relative to the lower mold base 12, and synchronously drive the ejector plate 122 to move up through the snap-fit ​​mechanism 14; the ejector insert 123 and the upper mold core 111 clamp the instrument frame 100 and move up synchronously, so that the instrument frame 100 and the lower mold core 121 are demolded; Step 4, start the injection molding machine to drive the upper mold base 11 to move up a second stroke x2 relative to the lower mold base 12, and synchronously drive the ejector plate 122 to move up through the locking mechanism 14; when the ejector insert 123 moves up synchronously, it swings inwardly by a first angle a1, providing an inward pulling force for the instrument frame 100; Step 5, start the injection molding machine to drive the upper mold base 11 to move up a third stroke x3 relative to the lower mold base 12, and at the same time, the fastening mechanism 14 is disconnected from the ejection plate 122, so that the instrument frame 100 and the upper mold core 111 are demolded; Step 6, start the injection molding machine to drive the ejector plate 122 to move up a fourth stroke x4, and the ejector insert 123 moves up synchronously and swings inwardly by a second angle a2, so that the instrument frame 100 and the ejector insert 123 are completely disengaged; Step 7, repeating steps 2-6, continuing to injection mold the instrument frame 100 and demolding the instrument frame 100.

[0056] Specifically, in step 3, the final stroke of the first stroke x1 of the upper mold base 11 relative to the lower mold base 12 is 25 mm; the ejector plate 122 and the ejector insert 123 are synchronously displaced by 25 mm, that is, the top of the ejector insert 123 is moved up by 25 mm relative to the lower mold core 121, thereby ejecting the instrument frame 100 from the lower mold core 121 to complete demolding; since the ejector insert 123 is synchronously displaced with the upper mold base 11, the ejector insert 123 and the upper mold core 111 jointly clamp the instrument frame 100 during the process of ejecting the instrument frame 100 from the lower mold core 121; thereby effectively solving the problem of damaging the instrument frame 100 when the instrument frame 100 is ejected from the lower mold core 121 by only the ejector pin in the traditional technology, thereby improving the production yield of the instrument frame 100.

[0057] In step 4, the final stroke of the second stroke x2 of the upper mold base 11 relative to the lower mold base 12 is 25 mm, and the ejector insert 123 is synchronously moved upward and swung inward at a first angle a1 of 2 degrees; in fact, the first angle a1 is swung from 0 degrees to 2 degrees according to the gradual upward movement of the ejector insert 123. By swinging the ejector insert 123 by 2 degrees during the second upward movement, the inward pulling force can be gradually provided to the instrument frame 100 in advance, so that auxiliary pulling force can be provided when the instrument frame 100 is subsequently demolded from the upper mold core 111, which can effectively avoid the problem of scratching the surface pattern during the demolding of the instrument frame 100 from the upper mold core 111, thereby improving the production yield of the instrument frame 100.

[0058] In step 5, the final stroke of the third stroke x3 of the upper mold base 11 relative to the lower mold base 12 is 1000mm, thereby expanding the spacing distance between the lower mold base 12 and the upper mold base 11, so as to facilitate the subsequent unloading of the instrument frame 100. The ejector plate 122 is restricted by the ejector rod of the injection molding machine to be able to move freely upward in the first and second strokes. In the third stroke, the ejector rod can restrict the ejector plate 122 from continuing to move upward; since the ejector plate 122 cannot continue to move upward, during the process of the upper mold base 11 continuing to move upward for the third stroke, the first buckle arm 141 can act on the first buckle block 142 to move inward, so that the first buckle arm 141 and the first buckle block 142 are disengaged, allowing the upper mold base 11 to be disconnected from the ejector plate 122; at this time, the demoulding of the upper mold core 111 and the instrument frame 100 is completed synchronously, and during this process, the ejector plate 122 and the ejector insert 123 are fixed and do not move.

[0059] In step 6, the final stroke of the ejector plate 122 moving up the fourth stroke x4 is 30 mm; in fact, the fourth stroke x4 of the ejector plate 122 is driven by the ejector rod of the injection molding machine to move up; when the ejector plate 122 moves up the fourth stroke, the ejector insert 123 moves up synchronously and swings inward by a second angle a2 of 5 degrees, at which time the ejector insert 123 and the buckle 101 of the instrument frame 100 can be disengaged; the entire instrument frame 100 is completely demolded, and then a robot is used to pick up and unload the material.

[0060] The above are only preferred embodiments of the present invention, and only specifically describe the technical principles of the present invention. These descriptions are only for explaining the principles of the present invention and cannot be interpreted as limiting the scope of protection of the present invention in any way. Based on the explanations here, any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention, and other specific implementations of the present invention that can be associated with by technicians in this field without creative labor, should be included in the scope of protection of the present invention.

Claims

1. An injection mold for an automobile instrument frame, comprising an upper mold base (11) and a lower mold base (12) which are movably mounted together, the upper mold base (11) being provided with an upper mold core (111), and the lower mold base (12) being provided with a lower mold core (121); the upper mold core (111) and the lower mold core (121) are molded together to enclose a molding chamber (13) for injection molding the automobile instrument frame; Features: The upper mold core (111) is provided with a texture molding portion (112) for injection molding a pattern of an automobile instrument frame, and the lower mold base (12) is provided with an ejector plate (122) that can move up and down, and the ejector plate (122) is pivotally connected to a plurality of ejector inserts (123), and the top of the ejector insert (123) can be telescopic in the molding chamber (13) and cooperate with the molding chamber (13) to injection mold the buckle portion (101) of the instrument frame (100); The upper die seat (11) is provided with a snap-fit ​​mechanism (14) capable of snapping together or disconnecting with the ejection plate (122).

2. The automobile instrument frame injection mold according to claim 1, characterized in that: The lower mold core (121) is provided with first through holes (1211) whose number is equal to that of the ejection insert (123); the bottom of the first through holes (1211) is provided with a first notch (1212) penetrating the outer side surface of the lower mold core (121); the first notch (1212) is installed with a first base (124); The ejector insert (123) can extend into or exit the molding chamber (13) through the first through hole (1211); when the ejector insert (123) moves upward and extends into the molding chamber (13), the first base (124) can act on the ejector insert (123) to swing inward.

3. The automobile instrument frame injection mold according to claim 2, characterized in that: A first inclined surface (1241) is provided on a side of the first base (124) facing the first through hole (1211), and the first inclined surface is inclined from bottom to top (1241) towards the center direction of the first through hole (1211); A second inclined surface is provided on a side of the ejection insert (123) facing the first base, and when the ejection insert (123) moves upward, the top of the first inclined surface (1241) can abut against the second inclined surface and cause the ejection insert (123) to swing inward.

4. The automobile instrument frame injection mold according to claim 3, characterized in that: The inward inclination angle of the first inclined surface (1241) is greater than the inward inclination angle of the second inclined surface; The second inclined surface comprises a first inclined surface section (1231) and a second inclined surface section (1232) which are arranged vertically. When the top of the first inclined surface (1241) abuts against the bottom of the first inclined surface section (1231), it can act on the ejector insert (123) to swing inwardly at a first angle (a1); and when the top of the first inclined surface (1241) abuts against the bottom of the second inclined surface section (1232), it can act on the ejector insert (123) to swing inwardly at a second angle (a2).

5. The automobile instrument frame injection mold according to claim 4, characterized in that: After the lower die base (12) moves upward by a first stroke (x1), the locking mechanism (14) can pull the ejector plate (122) to move upward synchronously so that the ejector insert (123) pushes the instrument frame (100) away from the lower die core; After the lower die base (12) moves upward by a second stroke (x2), the locking mechanism (14) can pull the ejector plate (122) to move upward synchronously so that the ejector insert (123) swings inwardly by a first angle (a1) to provide an inward pulling force for the instrument frame (100); When the lower die base (12) moves upward by a third stroke (x3), the locking mechanism (14) is disconnected from the ejection plate (122) and the instrument frame (100) is separated from the upper die core (111); When the ejection plate (122) moves upwards by a fourth stroke (x4), the ejection insert (123) can move upwards synchronously and swing inwards by a second angle (a2) and be disengaged from the instrument frame (100).

6. The automobile instrument frame injection mold according to any one of claims 1 to 5, characterized in that: The release mechanism (14) comprises a first latch arm (141) fixedly mounted on the upper die base (11) and extending downward, and a first latch block (142) mounted on the ejection plate (122) and capable of moving inward and outward, wherein a first latch notch (1411) is provided on a side of the first latch arm (141) facing the first latch block (142), and the first latch block (142) can be inserted into the first latch notch (1411) after moving outward.

7. The automobile instrument frame injection mold according to claim 6, characterized in that: A first guiding inclined surface (1421) is provided at the bottom of the first buckle block (142), and the first guiding inclined surface (1421) is inclined upward from the inside to the outside; A second guiding inclined surface (1412) adapted to the first guiding inclined surface (1421) is provided at the bottom of the first locking notch (1411); when the upper die seat (11) is disconnected from the ejection plate (122), the first locking arm (141) can act on the first locking block (142) to move inwards to complete the disconnection.

8. The automobile instrument frame injection mold according to claim 1, characterized in that: The upper mold base (11) is provided with a glue inlet (15), and the glue inlet (15) is connected to the molding chamber through a flow channel; the upper mold base (11) is provided with a steam heating system (16).

9. An injection molding method for an automobile instrument frame injection mold, characterized in that: The invention comprises the automobile instrument frame injection mold (10) as claimed in any one of claims 1 to 8.

10. The method for molding an automobile instrument frame molding mold according to claim 9, characterized in that: The injection molding method comprises Step 1, providing an injection molding machine to install an upper mold base (11) and a lower mold base (12); Step 2, starting the injection molding machine to drive the upper mold base (11) to move relative to the lower mold base (12), so that the upper mold core (111) and the lower mold core (121) are molded together, and then injecting the hot melt slurry into the molding chamber (13) through the glue inlet (15); and waiting for 20 seconds to 60 seconds of cooling time to mold the instrument frame (100); Step 3, starting the injection molding machine to drive the upper mold base (11) to move upward by a first stroke (x1) relative to the lower mold base (12), and synchronously driving the ejector plate (122) to move upward via the locking mechanism (14); causing the ejector insert (123) and the upper mold core (111) to clamp the instrument frame (100) and move upward synchronously, so that the instrument frame (100) and the lower mold core (121) are demoulded; Step 4, starting the injection molding machine to drive the upper mold base (11) to move upward by a second stroke (x2) relative to the lower mold base (12), and synchronously driving the ejector plate (122) to move upward via the locking mechanism (14); causing the ejector insert (123) to synchronously move upward and swing inward by a first angle (a1), thereby providing an inward pulling force for the instrument frame (100); Step 5, starting the injection molding machine to drive the upper mold base (11) to move upward by a third stroke (x3) relative to the lower mold base (12), and at the same time, the locking mechanism (14) is disconnected from the ejection plate (122), so that the instrument frame (100) and the upper mold core (111) are demoulded; Step 6, starting the injection molding machine to drive the ejector plate (122) to move up a fourth stroke (x4), and the ejector insert (123) to move up synchronously and swing inwards by a second angle (a2), so that the instrument frame (100) and the ejector insert (123) are completely disengaged; Step 7, repeating steps 2-6, continuing to injection mold the instrument frame (100) and demoulding the instrument frame (100).

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