Automobile instrument frame injection mold and injection molding method

Abstract

The present invention relates to the field of injection mold technology, and in particular to an injection mold for an automobile instrument frame and an injection molding method thereof; comprising an upper mold base and a lower mold base that are movable and installed together, the upper mold core of the upper mold base and the lower mold core of the lower mold base can be molded together to form a molding chamber; the upper mold core is provided with a texture molding portion, the lower mold base is provided with an ejector plate that can move up and down, the ejector plate is pivotally connected to a plurality of ejector inserts, the top of the ejector insert can be retracted in the molding chamber and cooperate with the buckle portion of the molding chamber to injection-mold the instrument frame; the upper mold base is provided with a snap mechanism that can be snapped together or disconnected with the ejector plate. Compared with the prior art, when the instrument frame is demolded from the lower mold core, the upper mold base and the ejector insert can be moved synchronously to clamp the instrument frame for demolding, thereby avoiding the problem of ejection damage, thereby further improving the production yield of the instrument frame; at the same time, it can avoid the problem of the instrument frame being separated from the upper mold core and scratching the pattern on the surface of the instrument frame, thereby improving the production yield.

Description

Technical Field

[0001] The present 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 used to produce plastic products and give them precise structure and dimensions. Injection molding is a process used for mass production of complex parts. Specifically, the process involves injecting heated, molten plastic into a mold cavity under high pressure using an injection molding machine. After cooling and solidification, the resulting molded product is formed.

[0003] Injection molds typically consist of an upper mold, a lower mold, and an upper mold core. The upper and lower mold cores are then joined and released to create the final product. Specifically, in the automotive industry, auto parts, such as instrument panel bezels and center console bezels, are often molded using injection molds.

[0004] Please also refer to Figure 1 , which is the specific structure of an automotive instrument panel frame 1000 in the prior art; the overall automotive instrument panel frame 1000 is an inverted "L" shape. Multiple clips 1002 are provided on the inner side 1001 of the automotive instrument panel frame 1000 for subsequent assembly with the central control housing. The outer surface 1003 of the automotive instrument panel frame 1000 is typically patterned according to actual production needs. This type of automotive instrument panel frame 1000 is typically first molded using an injection mold to form the entire automotive instrument panel frame 1000 and the clip locations. The outer surface of the entire automotive instrument panel frame 1000 is then knurled using a CNC machining center. Finally, the exterior of the automotive instrument panel frame 1000 is polished and deburred to complete the processing of the automotive instrument panel 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 CNC processed later, resulting in a long processing time for the automobile instrument frame 1000, which seriously limits 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 to address 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-mentioned object, the present invention adopts the following technical solution: an injection mold for an automobile instrument frame, comprising an upper mold base and a lower mold base that are movably mounted together, the upper mold base having an upper mold core, and the lower mold base having a lower mold core; the upper mold core and the lower mold core are combined to form a molding chamber for injection molding the instrument frame;

[0009] The upper mold core is provided with a texture forming part for injection molding the instrument frame pattern, and the lower mold base is provided with an ejector plate that can move up and down. The ejector plate is pivotally connected to multiple ejector inserts. The top of the ejector insert can be retracted in the molding chamber and cooperate with the molding chamber to injection mold the buckle of the instrument frame; the upper mold base is provided with a snap-fit ​​mechanism that can be snap-fitted and connected or disconnected with the ejector plate.

[0010] 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;

[0011] 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.

[0012] 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 of the first through hole;

[0013] A second inclined surface is provided on one side of the ejector insert facing the first base. When the ejector insert moves upward, the top of the first inclined surface can abut against the second inclined surface and cause the ejector insert to swing inward.

[0014] 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;

[0015] The second inclined surface includes a first inclined surface segment and a second inclined surface segment arranged above and below. When the top of the first inclined surface abuts against the bottom of the first inclined surface segment, the ejector insert can be swung inward at a first angle. When the top of the first inclined surface abuts against the bottom of the second inclined surface segment, the ejector insert can be swung inward at a second angle.

[0016] As a preferred solution: after the upper 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;

[0017] After the upper die seat moves up the second stroke, the locking mechanism can pull the ejector plate to move up synchronously so that the ejector insert swings inwards to the first angle to provide inward pulling force for the instrument frame;

[0018] When the upper die seat moves up to the third stroke, the fastening mechanism is disconnected from the ejection plate and the instrument frame is separated from the upper die core;

[0019] When the ejector plate moves up the fourth stroke, the ejector insert can move up synchronously and swing inwards by a second angle and be disengaged from the instrument frame.

[0020] As a preferred solution: the snap-fit ​​mechanism includes a first snap-fit ​​arm fixedly mounted on the upper mold base and extending downward, and a first snap-fit ​​block that can move inward and outward and is mounted on the ejection plate. A first snap-fit ​​notch is provided on the side of the first snap-fit ​​arm facing the first snap-fit ​​block, and the first snap-fit ​​block can be inserted into the first snap-fit ​​notch after moving outward.

[0021] 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;

[0022] A second guide slope adapted to the first guide 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.

[0023] 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.

[0024] 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 snapping mechanism can pull the ejector plate to move synchronously to demold the instrument frame and the lower mold core; after the upper mold base moves up by the second stroke relative to the lower mold base, the snapping mechanism can pull the ejector plate to move synchronously to swing the ejector insert inwardly to a first angle, which is 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 snapping 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 to a second angle to disengage the instrument frame from the ejector insert.

[0025] Compared with the existing technology, firstly, the locking mechanism provided enables the upper die holder and the ejection insert to move synchronously to clamp the instrument frame when the instrument frame is demolded from the lower die core. This can effectively avoid the problem of damaging the instrument frame after being ejected from the lower die core by the ejector alone, thereby further improving the production yield of the instrument frame.

[0026] Secondly, the locking mechanism is designed to provide an inward pulling force to the instrument frame during the second and third strokes of the upper die seat relative to the lower die seat before it is separated from the upper die core. This structure prevents the instrument frame from scratching the pattern on the surface during the separation from the upper die core, thereby improving the production yield of the instrument frame.

[0027] Thirdly, the clever setting of the 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 molds 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.

[0028] The present application also provides an injection molding method for an automobile instrument frame injection mold, including the automobile instrument frame injection mold.

[0029] As a preferred solution: the injection molding method includes

[0030] Step 1: Provide the injection molding machine with the upper mold base and lower mold base for installation;

[0031] Step 2: Start the injection molding machine to drive the upper mold base to move relative to the lower mold base, so that the upper mold core and the lower mold core are molded together, and then inject the hot melt slurry into the molding chamber through the glue inlet; wait for 20 seconds to 60 seconds to cool down to form the instrument frame;

[0032] Step 3: Start the injection molding machine to drive the upper mold base to move up a first stroke relative to the lower mold base, and synchronously drive the ejector plate to move up via the locking mechanism; the ejector insert and the upper mold core clamp the instrument frame and move upward synchronously, so that the instrument frame and the lower mold core are demolded;

[0033] Step 4: Start the injection molding machine to drive the upper mold base to move upward relative to the lower mold base by a second stroke, and synchronously drive the ejector plate to move upward via the locking mechanism; when the ejector insert moves upward synchronously, it swings inward by a first angle, providing inward pulling force for the instrument frame;

[0034] Step 5: Start the injection molding machine to drive the upper mold base to move up the third stroke relative to the lower mold base, and at the same time, the fastening mechanism disengages the ejector plate, so that the instrument frame is demolded from the upper mold core;

[0035] Step 6: Start the injection molding machine to drive the ejector plate to move up to the fourth stroke, and the ejector insert is synchronously moved up and swung inward by a second angle, so that the instrument frame and the ejector insert are completely disengaged;

[0036] Step 7, repeat steps 2-6 to continue injection molding the instrument frame and demold the instrument frame.

[0037] The injection molding method of the automobile instrument frame injection mold provided by the present application has the following advantages: compared with the prior art, during the mold opening operation, after the upper mold base moves up by a first stroke relative to the lower mold base, the snapping mechanism can pull the ejector plate to move synchronously to release the instrument frame from the lower mold core; after the upper mold base moves up by a second stroke relative to the lower mold base, the snapping mechanism can pull the ejector plate to move synchronously to cause the ejector insert to swing inward by a first angle, which is the pulling force on the instrument frame inward; after the upper mold base moves up by a third stroke relative to the lower mold base, the snapping mechanism can disengage the ejector plate and release the instrument frame from the upper mold core; after the ejector plate moves up by a fourth stroke, the ejector insert can swing inward by a second angle to release the instrument frame from the ejector insert;

[0038] With this structure, when the instrument frame is demolded from the lower mold core, the upper mold base and the ejector insert move synchronously to clamp the instrument frame. This can effectively avoid the problem of the instrument frame being damaged after being ejected from the lower mold core by the ejector alone, thereby further improving the production yield of the instrument frame.

[0039] Secondly, during the second and third strokes of the upper die seat relative to the lower die seat, the upper die seat provides inward pulling force to the instrument frame before separating from the upper die core. This structure prevents the instrument frame from scratching the surface pattern during the separation process, thereby improving the production yield of the instrument frame.

[0040] Moreover, the injection mold uses four upward strokes to cooperate with the demolding operation of the instrument frame. The injection molding and pattern molding of the instrument frame can be completed in one set of injection molds 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

[0041] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments or descriptions of the prior art. 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 any creative work.

[0042] 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;

[0043] Figure 2 Schematic diagram of the three-dimensional structure of the automobile instrument frame injection mold provided in an embodiment of the present application;

[0044] Figure 3 yes Figure 2 The cross-sectional view at AA of the injection mold of the automobile instrument frame shown;

[0045] Figure 4yes Figure 3 The enlarged view of point A of the injection mold for the automobile instrument frame is shown;

[0046] Figure 5 yes Figure 4 The enlarged view of point B of the injection mold of the automobile instrument frame shown;

[0047] Figure 6 yes Figure 2 The cross-sectional view at point BB of the injection mold for the automobile instrument frame is shown;

[0048] Figure 7 yes Figure 6 The enlarged view of point C of the injection mold of the automobile instrument frame shown;

[0049] Figure 8 yes Figure 2 A detailed cross-sectional view of the ejector insert, lower mold core, and first base in the injection mold for the automobile instrument frame shown;

[0050] Figure 9 yes Figure 2 The partial structural cross-sectional view of the automobile instrument frame injection mold during the first upward movement shown;

[0051] Figure 10 yes Figure 2 The partial structural cross-sectional view of the automobile instrument frame injection mold during the second upward movement;

[0052] Figure 11 yes Figure 10 The enlarged view of point D in the injection mold of the automobile instrument frame shown;

[0053] Figure 12 yes Figure 2 The partial structural cross-sectional view of the automobile instrument frame injection mold when it moves up to the third stroke shown;

[0054] Figure 13 yes Figure 2 The partial structural cross-sectional view of the automobile instrument frame injection mold in the fourth upward stroke shown;

[0055] Figure 14 yes Figure 13 The enlarged view of point E in the injection mold of the automobile instrument frame is shown;

[0056] Figure 15 yes Figure 8 A cross-sectional view of the specific structure of the ejector insert shown;

[0057] Figure 16 yes Figure 2 The diagram shown is a three-dimensional structural diagram of an instrument frame injection molded by an injection mold for an automobile instrument frame.

[0058] Among them, the reference numerals in the figures are:

[0059] 1000, automobile instrument frame; 1001, inner surface; 1002, buckle; 1003, outer surface;

[0060] 10. Injection mold for automobile instrument panel frame; 11. Upper mold base; 111. Upper mold core; 112. Texture forming portion; 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 inclined section; 1232. Second inclined section; 1233. Extension rod; 1234. First pivoting protrusion; 1235. First pivoting seat; 1236. Pin; 1237. Rotating Movable seat; 1238, avoidance notch; 124, first base; 1241, first inclined surface; 1242, top position; 13, molding chamber; 14, fastening mechanism; 141, first fastening arm; 1411, first fastening notch; 1412, second guide inclined surface; 1413, fourth guide inclined surface; 142, first fastening block; 1421, first guide inclined surface; 1422, third guide inclined surface; 143, first guide plate; 1431, first through slot; 15, glue inlet; 16, steam heating system; 17, oil cylinder;

[0061] a1, first angle; a2, second angle;

[0062] x1, first stroke; x2, second stroke; x3, third stroke; x4, fourth stroke;

[0063] 100. Instrument frame; 101. Buckle; 102. Pattern. DETAILED DESCRIPTION

[0064] In order to make the technical problems, technical solutions and beneficial effects to be solved by this application more clearly understood, this application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.

[0065] It should be noted that when an element is referred to as being “fixed on” or “disposed on” another element, it may 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 may be directly connected to the other element or indirectly connected to the other element.

[0066] 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 accompanying drawings, and are only for the convenience of describing this 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 cannot be understood as a limitation on this application.

[0067] 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 the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. Throughout the description of this application, "plurality" means two or more, unless otherwise specifically defined.

[0068] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments.

[0069] Before explaining the embodiments of the present application in detail, the application scenarios of the embodiments of the present application are first described.

[0070] Please also refer to Figure 1 , which is a specific structure of an automotive instrument panel frame in the prior art; the overall automotive instrument panel frame 1000 is an inverted "L" shape. Multiple clips 1002 are provided on the inner side 1001 of the automotive instrument panel frame 1000 for subsequent assembly with the central control housing. The outer surface 1003 of the automotive instrument panel frame 1000 is typically patterned according to actual production needs. This type of automotive instrument panel frame 1000 is typically first molded using an injection mold to form the entire automotive instrument panel frame 1000 and the clip locations. The outer surface of the entire automotive instrument panel frame 1000 is then knurled using a CNC machining center. Finally, the exterior of the automotive instrument panel frame 1000 is polished and deburred to complete the processing of the automotive instrument panel frame 1000.

[0071] The inventors discovered in actual production operations that this type of automobile instrument bezel 1000 has the following defects during the manufacturing process:

[0072] First, during the mold opening process of the injection mold, the upper mold base is usually moved first to release the upper mold core and the automobile instrument frame 1000 from the mold, and then the automobile instrument frame 1000 is ejected using an ejector pin to complete the mold opening of the automobile instrument frame 1000 and the lower mold core. However, due to the overall thickness of the automobile instrument frame 1000, the automobile instrument frame 1000 is easily damaged when only the ejector pin is used for ejection, which seriously limits the production yield of the automobile instrument frame 1000.

[0073] 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 CNC processed later, which causes the processing of the automobile instrument frame 1000 to take a long time and seriously limits the production efficiency.

[0074] In view of this, the inventors developed a new injection mold for automobile instrument frames to solve the technical defects of low production yield and low production efficiency in the existing technology of injection molds used for injection molding automobile instrument frames.

[0075] Please also refer to Figures 2 to 16 The injection mold 10 of the automobile instrument frame 100 provided in the embodiment of the present application is now described. The injection mold 10 of the automobile instrument frame 100 includes: an upper mold base 11, a lower mold base 12 and a buckling mechanism.

[0076] 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 combined to form a molding chamber 13 for injection molding the automobile instrument frame 100; the upper mold core 111 is provided with a texture molding part 112 for injection molding the 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 to 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 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.

[0077] It should be noted that the texture forming portion 112 covers the surface of the upper mold core 111 facing the forming cavity 13 .

[0078] Please also refer to 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 ejection inserts 123. The bottom of the first through holes 1211 is provided with first notches 1212 that penetrate the outer surface of the lower mold core 121. The first notch 1212 is installed with a first base 124. The ejection insert 123 can extend into or exit the molding chamber 13 through the first through holes 1211. When the ejection insert 123 moves upward and extends into the molding chamber 13, the first base 124 can act to cause the ejection insert 123 to swing inward.

[0079] In some embodiments of the present application, the first through hole 1211 is a square hole, and the ejector insert 123 also has a square cylindrical structure in cross section, 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.

[0080] 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 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. 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.

[0081] More specifically, 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 includes a first inclined surface segment 1231 and a second inclined surface segment 1232 arranged upper and lower. When the top of the first inclined surface 1241 abuts against the bottom of the first inclined surface segment 1231, it can cause the ejector insert 123 to swing inward at a first angle a1. When the top of the first inclined surface 1241 abuts against the bottom of the second inclined surface segment 1232, it can cause the ejector insert 123 to swing inward at a second angle a2.

[0082] 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, the top position 1242 of the first bevel 1241 can selectively abut against the first bevel section 1231 or the second bevel section 1232 during the upward movement of the ejector insert 123. When abutting against the first bevel section 1231, the ejector insert 123 can be caused to swing inwardly by a first angle; when abutting against the second bevel section 1232, the ejector insert 123 can be caused to swing inwardly by a second angle.

[0083] 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.

[0084] Furthermore, after the upper mold base 11 moves up the first stroke x1, the snapping 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 upper mold base 11 moves up the second stroke x2, the snapping mechanism 14 can pull the ejector plate 122 to move up synchronously so that the ejector insert 123 swings inwardly by the first angle a1 to provide an inward pulling force for the instrument frame 100; when the upper mold base 11 moves up the third stroke x3, the snapping mechanism 14 disengages from the connection with 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 by the second angle a2 and disengage from the instrument frame 100.

[0085] 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 upper and lower directions of the second bevel; when the top position 1242 of the first bevel 1241 gradually switches from abutting the top of the first bevel section 1231 to abutting 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 the top of the second bevel section 1232 to abutting the bottom of the second bevel section 1232, the overall swing angle of the ejector insert 123 continues to swing inward on the basis of 2 degrees to 5 degrees, thereby completing the release operation of the instrument frame 100.

[0086] Please also refer to Figure 15 In some other embodiments of the present application, the bottom of the ejection insert 123 is pivotally connected to an extension rod 1233, and the bottom of the extension rod 1233 is pivotally connected to a rotating seat 1237, 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 with the ejection plate 122 and be swingable during the upward movement of the ejection plate 122.

[0087] Specifically, the bottom of the ejector insert 123 is provided with a first pivoting protrusion 1234, and the top of the extension rod 1233 is provided with a first pivoting seat 1235. Both the first pivoting protrusion 1234 and the first pivoting seat 1235 are provided with through-holes. A pin 1236 is inserted into the through-hole to connect the ejector insert 123 and the extension rod 1233. If the ejector insert 123 of a different size needs to be replaced later, the pin 1236 can be removed, the ejector insert 123 can be moved upward, and removed from the first through-hole 1211.

[0088] At the same time, the first base 124 is fastened to 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 match the ejection of instrument frames 100 of different sizes, thereby improving the versatility of the injection mold.

[0089] Please also refer to Figure 5 、 Figures 9 to 13 In some embodiments of the present application, the snap-fit ​​mechanism 14 includes a first snap-fit ​​arm 141 fixedly mounted on the upper mold base 11 and extending downward, and a first snap-fit ​​block 142 that can move inward and outward and is mounted on the ejection plate 122. A first snap-fit ​​notch 1411 is provided on the side of the first snap-fit ​​arm 141 facing the first snap-fit ​​block 142, and the first snap-fit ​​block 142 can be inserted into the first snap-fit ​​notch 1411 after moving outward.

[0090] Specifically, the bottom of the first buckle block 142 is provided with a first guide bevel 1421, which slopes upward from the inside outward. The bottom of the first engaging notch 1411 is provided with a second guide bevel 1412 that matches the first guide bevel 1421. When the upper mold base 11 is disconnected from the ejector plate 122, the first buckle arm 141 can move the first buckle block 142 inward to complete the disconnection. The top outer side of the first buckle block 142 is provided with a third guide bevel 1422, which slopes upward from the outside inward. The bottom of the first buckle arm 141, facing the first buckle block 142, is provided with a fourth guide bevel 1413 that matches the third guide bevel 1422.

[0091] Preferably, the lower mold base 12 is equipped with a first guide plate 143, which is located on the outside 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 running through its upper surface and inner 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, the third guide bevel 1422 and the fourth guide bevel 1413 first 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.

[0092] In more detail, a first window 1221 is provided on the outer side of the ejection plate 122, and the first buckle block 142 can be 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 extend, so that after the first buckle arm 141 moves down into place, the first buckle block 142 can be inserted into the first buckling notch 1411 independently.

[0093] Preferably, oil cylinders 17 are installed at the four corners of the bottom of the upper mold base 11, and the telescopic rods of the oil cylinders 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 oil cylinders 17 to ensure that the ejector plate 122 is completely reset and the first buckle block 142 is buckled into the first buckling notch 1411, thereby improving the reliability of the injection mold for continuous injection.

[0094] Please also refer to Figures 2 to 3 The upper mold base 11 is provided with a glue inlet 15, which is connected to the molding chamber 13 through a flow channel; the upper mold base 11 is provided with a steam heating system 16. 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.

[0095] In addition, a guide column is provided between the upper mold base 11 and the lower mold base 12, and a guide hole is provided between the other one for inserting the guide column. The setting of the guide column and the guide hole can ensure that the upper mold base 11 can only move straight up or straight down relative to the lower mold base 12. These limiting structures are conventional design means for those skilled in the art and will not be described in detail here.

[0096] Please also refer to 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 .

[0097] Specifically, the injection molding method includes

[0098] Step 1: Provide an injection molding machine and install an upper mold base 11 and a lower mold base 12;

[0099] 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 completely closed, and then inject the hot melt slurry into the molding chamber 13 through the glue inlet 15; wait for 20 to 60 seconds to cool down to form the instrument frame 100;

[0100] Step 3: Start the injection molding machine to drive the upper mold base 11 to move upward relative to the lower mold base 12 by a first stroke x1, and synchronously drive the ejector plate 122 to move upward via the locking mechanism 14; the ejector insert 123 and the upper mold core 111 clamp the instrument frame 100 and move upward synchronously, so that the instrument frame 100 and the lower mold core 121 are demolded;

[0101] Step 4: Start the injection molding machine to drive the upper mold base 11 to move upward relative to the lower mold base 12 by a second stroke x2, and synchronously drive the ejector plate 122 to move upward via the locking mechanism 14; while the ejector insert 123 moves upward, it swings inward by a first angle a1, providing an inward pulling force to the instrument frame 100;

[0102] Step 5: Start 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. Simultaneously, the fastening mechanism 14 is disconnected from the ejector plate 122, thereby demolding the instrument frame 100 from the upper mold core 111.

[0103] 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 to move up synchronously and swing inward by a second angle a2, so that the instrument frame 100 and the ejector insert 123 are completely disengaged;

[0104] Step 7: Repeat steps 2-6 to continue injection molding the instrument frame 100 and demold the instrument frame 100.

[0105] 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.

[0106] In step 4, the upper mold base 11 moves upward relative to the lower mold base 12 for the second stroke x2, resulting in a final stroke of 25 mm. The ejector insert 123 simultaneously moves upward and swings inward at a first angle a1 of 2 degrees. In practice, the first angle a1 swings from 0 degrees to 2 degrees as the ejector insert 123 gradually moves upward. By swinging the ejector insert 123 by 2 degrees during the second upward stroke, a gradual inward pulling force can be pre-applied to the instrument frame 100, providing auxiliary pulling force when the instrument frame 100 is subsequently demolded from the upper mold core 111. This effectively prevents scratches on the surface pattern of the instrument frame 100 during demolding from the upper mold core 111, thereby improving the production yield of the instrument frame 100.

[0107] In step 5, the upper mold base 11 moves up the third stroke x3 relative to the lower mold base 12 to a final stroke of 1000 mm, thereby increasing the spacing between the lower mold base 12 and the upper mold base 11 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 upward freely 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 move upward, during the process of the upper mold base 11 continuing to move up the third stroke, the first latch arm 141 can act on the first latch block 142 to move inward, causing the first latch arm 141 to disengage from the first latch block 142, allowing the upper mold base 11 to detach from the ejector plate 122. At this time, the demolding of the upper mold core 111 and the instrument frame 100 is completed synchronously. During this process, the ejector plate 122 and the ejector insert 123 are fixed and do not move.

[0108] 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 complete the upward movement; when the ejector plate 122 moves up the fourth stroke, the ejector insert 123 moves up synchronously and swings inward by the second angle a2 of 5 degrees. At this 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 the robot arm is used to pick up and unload the material.

[0109] The above is merely a preferred embodiment of the present invention and specifically describes the technical principles of the present invention. These descriptions are intended only to explain the principles of the present invention and should not be construed in any way as limiting the scope of protection of the present invention. Based on the explanations herein, any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention, as well as other specific embodiments of the present invention that can be imagined by those skilled in the art without inventive effort, shall be included within 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) that 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) being combined to form a molding chamber (13) for injection molding the automobile instrument frame; Its characteristics are: The upper mold core (111) is provided with a texture forming 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 tops of the ejector inserts (123) can be telescopic in the molding chamber (13) and cooperate with the buckle portion (101) of the molding chamber (13) to injection mold the instrument frame (100); the upper mold base (11) is provided with a buckling mechanism (14) that can be buckled and connected to or disconnected from the ejector plate (122); The lower mold core (121) is provided with first through holes (1211) having the same number as the ejection insert (123), and the bottom of the first through hole (1211) is provided with a first notch (1212) penetrating the outer side surface of the lower mold core (121), and the first notch (1212) is installed with a first base (124); the ejection insert (123) can extend into or exit the molding chamber (13) through the first through hole (1211), and when the ejection insert (123) moves upward and extends into the molding chamber (13), the first base (124) can act on the ejection insert (123) to swing inward; 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 (1241) is inclined from bottom to top toward the center 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; 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) arranged above and below; when the top of the first inclined surface (1241) abuts against the bottom of the first inclined surface section (1231), it can cause the ejector insert (123) to swing inward 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 cause the ejector insert (123) to swing inward at a second angle (a2).

2. The automobile instrument frame injection mold according to claim 1, characterized in that: After the upper die base (11) moves upward by the 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 upper die seat (11) moves upward by a second stroke (x2), the locking mechanism (14) can pull the ejection plate (122) to move upward synchronously, causing the ejection insert (123) to swing inward by a first angle (a1) to provide an inward pulling force for the instrument frame (100); When the upper die seat (11) 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).

3. The automobile instrument frame injection mold according to claim 1 or 2, characterized in that: The locking mechanism (14) comprises a first locking arm (141) fixedly mounted on the upper die base (11) and extending downward, and a first locking block (142) mounted on the ejection plate (122) and capable of moving inward and outward. A first locking notch (1411) is provided on a side of the first locking arm (141) facing the first locking block (142), and the first locking block (142) can be inserted into the first locking notch (1411) after moving outward.

4. The automobile instrument frame injection mold according to claim 3, 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 guide slope (1412) adapted to the first guide slope (1421) is provided at the bottom of the first engaging notch (1411). When the upper die base (11) is disconnected from the ejection plate (122), the first latch arm (141) can act on the first latch block (142) to move inwards to complete the disconnection.

5. The automobile instrument frame injection mold according to claim 4, 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).

6. An injection molding method for an automobile instrument frame injection mold, characterized in that: An automobile instrument frame injection mold (10) as described in any one of claims 1 to 5 is used.

7. The method for molding an automobile instrument frame according to claim 6, 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: 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 inject the hot melt slurry into the molding chamber (13) through the glue inlet (15); and wait for 20 seconds to 60 seconds for cooling to form the instrument frame (100); Step 3, start the injection molding machine to drive the upper mold base (11) to move up a first stroke (x1) relative to the lower mold base (12), and synchronously drive the ejector plate (122) to move up via the locking mechanism (14); the ejector insert (123) and the upper mold core (111) clamping the instrument frame (100) to move up 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 move upward synchronously and swing inward by a first angle (a1), thereby 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, 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 inward 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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