Injection mold for automobile knob assembly

Abstract

The utility model relates to an automobile knob assembly injection mold which comprises a first color injection mold set and a second color injection mold set, the first color injection mold set comprises a first upper mold and a first lower mold which are oppositely arranged, the second color injection mold set comprises a second upper mold and a second lower mold which are oppositely arranged, and the first upper mold and the second upper mold can synchronously open / close the mold. The first lower mold and the second lower mold have the same structure and can realize position conversion, and the first upper mold and the first lower mold are matched to perform injection molding on the inner shell; and after the first lower mold with the injection molding inner shell and the vacant second lower mold are interchanged in position, the first lower mold is matched with the second upper mold to perform injection molding on the button ring. And the inner shell and the button ring can be directly injection-molded together.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile knob processing, in particular to an automobile knob assembly injection mold. Background Art

[0002] Knobs are widely used in automotive interior switches, where the knob assembly structure has an inner shell 1 ， , and arranged in the inner shell 1 ， Button ring 2 ， Button ring 2 ， The outer surface has convex patterns 21 ， , embossed 21 ， It can increase the friction with the fingers when in use; the inner shell 1 ， There is also a card block 11 ， , in block 11 ， There are long grooves 12 on both sides ， , card block 11 ， It is easy to connect with other components.

[0003] Inner shell 1 ， With button ring 2 ， The single color mold is separately injected and then assembled manually. ， With inner shell 1 ， The snap-fit ​​method is used for matching, and there will be a gap (±0.03mm) in the snap-fit ​​assembly, so the dimensional accuracy of the button ring 2 and the inner shell 1 products is extremely high, and the control during the assembly process is difficult. In addition, during long-term use, after the matching position is worn, the product is prone to shaking and the stability becomes poor. Utility Model Content

[0004] The purpose of the utility model: In order to overcome the defects of the prior art, the utility model provides an injection mold for an automobile knob assembly, which can directly injection mold the inner shell and the knob ring together.

[0005] The technical solution of the utility model is as follows: an injection mold for an automobile knob assembly, comprising a first-color injection mold and a second-color injection mold, wherein the first-color injection mold comprises a first upper mold and a first lower mold arranged opposite to each other, and the second-color injection mold comprises a second upper mold and a second lower mold arranged opposite to each other, the first upper mold and the second upper mold being capable of synchronous opening / closing movements, the first lower mold and the second lower mold being of the same structure and capable of position conversion, the first upper mold and the first lower mold being capable of injection molding an inner shell in cooperation with each other; the first lower mold with the injection molded inner shell being interchanged with the vacant second lower mold, and then being capable of injection molding a knob ring in cooperation with the second upper mold;

[0006] The first upper mold is provided with a first upper mold core, the first upper mold core has an inner shell molding mold core, the first lower mold and the second lower mold are both provided with lower mold cores, the lower mold cores have an inner shell molding mold base and a movable inner shell molding core pull, the inner shell molding mold core is used to form the inner circumference of the injection-molded inner shell, the inner shell molding core pull cooperates with the inner shell molding mold base to form an inner shell molding ring surface capable of molding the outer circumference of the injection-molded inner shell, the molding surface of the inner shell molding core pull has a card block molding cavity and a convex strip for forming a long groove,

[0007] The second upper mold is provided with a second upper mold core, which has a button ring molding mold core and multiple movable button ring molding core pulls. The button ring molding mold core is used to mold the inner circumference of the injection-molded button ring, and the multiple button ring molding core pulls cooperate to form a button ring molding ring surface that can mold the outer circumference of the injection-molded button ring. The molding surface of the button ring molding core pulls has a convex molding surface.

[0008] Preferably, the second upper mold includes an upper fixed plate, an upper mold core pulling plate and an upper mold plate which are arranged in sequence from top to bottom. The upper mold core pulling plate can also be moved up and separated relative to the upper mold plate. The second upper mold core is arranged on the upper mold plate. Each button ring shaping core pulling is driven by a corresponding core pulling drive group. The core pulling drive group includes a drive block located on the upper mold core pulling plate and a matching seat located on the upper mold plate. The button ring shaping core pulling is connected to the matching seat. The drive block has an inclined guide surface, which is inclined from bottom to top toward the button ring shaping core pulling side. The matching seat has an inclined guide cavity for inserting the drive block. When the upper mold core pulling plate moves down and is pressed against the upper mold plate, the drive blocks in each core pulling drive group are simultaneously inserted downward into their respective inclined guide cavities and the matching seat is pushed inward by the inclined guide surface, so that each button ring shaping core pulling can be driven to move toward the center at the same time and form a button ring forming ring surface.

[0009] Preferably, the second lower mold includes a lower mold plate and a lower fixed plate, the lower mold core is arranged on the lower mold plate, and a matching seat is also provided on the lower mold plate. The inner shell molding core pulling is connected to the matching seat, and the matching seat has an inclined guide cavity. At least one driving block is extended downward and can be inserted into the inclined guide cavity. When the second upper mold and the second lower mold are closed, the extended driving block is inserted downward into the inclined guide cavity and the matching seat is pushed inward by the inclined guide surface, which can drive the inner shell molding core pulling to move toward the center and cooperate with the inner shell molding mold seat to form an inner shell molding ring surface.

[0010] Preferably, the inner shell molding core is provided with a plurality of core pulling means.

[0011] This new product utilizes two-color injection molding: the first color is used to mold the inner shell (PC material), and the second color is used to mold the button ring (ABS material). Leveraging the excellent compatibility of ABS and PC, the button ring and inner shell are directly injection-molded together, eliminating the need for manual assembly. This solves the issues of long assembly cycles, high costs, and difficult assembly process control. Furthermore, by directly injection-molding the button ring and inner shell together, the bonding is more reliable, and the issues of shaking and poor stability during long-term use are resolved, meeting product quality requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a structural diagram of the knob assembly mentioned in the background technology of this utility model;

[0013] Figure 2 This is a structural diagram of the injection mold of the utility model;

[0014] Figure 3 This is a structural diagram of the first upper mold in the present utility model;

[0015] Figure 4 This is a structural diagram of the first lower mold in the present utility model;

[0016] Figure 5 This is a diagram showing the inner shell molding die base and multiple inner shell molding core pulling cooperation in the utility model;

[0017] Figure 6 This is a core-pulling structure diagram of the inner shell in the utility model;

[0018] Figure 7 This is a structural diagram of the second upper mold in the present utility model;

[0019] Figure 8 This is a diagram of the button ring molding mold core and multiple button ring molding core pulling structures of the utility model;

[0020] Figure 9 This is a diagram of the core-pulling structure of the button ring in the utility model;

[0021] Figure 10 This is a disassembled diagram of the core pulling drive group A in the utility model;

[0022] Figure 11 This is the structural diagram of the second lower mold in the present utility model, with an injection-molded inner shell;

[0023] Figure 12 This is a diagram of the inner shell molding die base and multiple inner shell molding core pulling coordination in the utility model, with an injection molded inner shell.

[0024] In the figure: inner shell 1 ， 、Card block 11 ， , long groove 12 ， 、Button ring 2 ， 、Relief 21， ;

[0025] First color injection mold 1, second color injection mold 2, first upper mold 11, first lower mold 12, second upper mold 21, second lower mold 22,

[0026] The first upper mold core 111, the inner shell molding mold core 11a, the lower mold core 23, the inner shell molding mold base 23a, the inner shell molding core 23b, the inner shell molding ring surface 23c, the block molding cavity 23b1, the convex strip 23b2,

[0027] The second upper mold core 211, the upper fixed plate 211A, the upper mold core plate 212, the upper mold plate 213, the button ring molding core 21a, the button ring molding core 21b, the button ring molding surface 21c, the convex molding surface 21b1, the core pulling drive group A3, the drive block A31, the inclined guide surface 311, the matching seat A32, the inclined guide cavity A321, the avoidance groove 2211, the clamping block 21b2, the clamping groove 322,

[0028] Lower template 221, lower fixed plate 222, matching seat B42, inclined guide cavity B421. DETAILED DESCRIPTION

[0029] The following will clearly and completely describe the technical solutions in this embodiment with reference to the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0030] like Figure 2-12As shown, the utility model is an injection mold for an automobile knob assembly, comprising a first color injection mold group 1 and a second color injection mold group 2, wherein the first color injection mold group 1 comprises a first upper mold group 11 and a first lower mold group 12 arranged opposite to each other, and the second color injection mold group 2 comprises a second upper mold group 21 and a second lower mold group 22 arranged opposite to each other, the first upper mold group 11 and the second upper mold group 21 can synchronously open / close the mold, the first lower mold group 12 and the second lower mold group 22 have the same structure, the first lower mold group 11 and the second lower mold group 22 are arranged on a turntable and rotate with the turntable to achieve position interchangeability, the first upper mold group 11 and the first lower mold group 12 cooperate to injection mold the inner shell; the first lower mold group 12 with the injection inner shell and the vacant second lower mold group 22 are interchangeable. After replacement, the button ring can be injection molded in cooperation with the second upper mold 21; the first upper mold 11 is provided with a first upper mold core 111, and the first upper mold core 111 has an inner shell molding core 11a, and the first lower mold 12 and the second lower mold 22 are both provided with a lower mold core 23, and the lower mold core 23 has an inner shell molding die base 23a and a movable inner shell molding core 23b. The inner shell molding core 11a is used to mold the inner circumference of the injection-molded inner shell, and the inner shell molding core 23b cooperates with the inner shell molding die base 23a to form an inner shell molding ring surface 23c that can mold the outer circumference of the injection-molded inner shell. The molding surface of the inner shell molding core 23b has a card block molding cavity 23b1 and a convex strip 23b2 for forming a long groove.

[0031] The second upper mold 21 is provided with a second upper mold core 211, and the second upper mold core 211 has a button ring molding mold core 21a and multiple movable button ring molding core pulls 21b. The button ring molding mold core 21a is used to mold the inner circumference of the injection-molded button ring, and the multiple button ring molding core pulls 21b cooperate to form a button ring molding ring surface 21c that can mold the outer circumference of the injection-molded button ring. The molding surface of the button ring molding core pull 21b has a convex molding surface 21b1, which is used to mold the convex patterns on the outer circumference of the button ring.

[0032] Specifically, the second upper mold 21 includes an upper fixed plate 211A, an upper mold core pulling plate 212 and an upper mold plate 213 arranged in sequence from top to bottom. The upper mold core pulling plate 212 can also be moved upward and separated relative to the upper mold plate 213. The upper fixed plate can drive the upper mold core pulling plate to move upward. After the upper mold core pulling plate moves up to a certain extent, the upper mold plate is pulled by the pull rod. At this time, the upper mold plate will move upward together with the upper mold core pulling plate. The second upper mold core 211 is arranged on the upper mold plate 213, and each button ring shape core pulling 21b is driven by the corresponding core pulling drive group A3. The core pulling drive group A3 includes a drive block A31 located on the upper mold core pulling plate 212, and a matching seat A32 located on the upper mold plate 213. The button ring shape core pulling 21b is connected to the matching seat A32 (the button ring shape core pulling 21b and the matching seat A32 can be integrally formed, or connected by screws, snaps, etc., and can be achieved by providing a clamping block 21b2 on the end head of the button ring shape core pulling 21b and a clamping groove 322 on the matching seat A32, or providing a clamping groove on the end head of the button ring shape core pulling 21b and a clamping block on the matching seat A32, and the clamping block is installed in the clamping groove to realize the button ring shape core pulling 21b is connected with the matching seat A32, so that the matching seat A32 can drive the button ring shape core pulling 21b to move inward or slide inward, wherein the clamping block can be a T-shaped block or an L-shaped block, and the clamping slot is a T-shaped slot or an L-slot, and the driving block A31 has an inclined guide surface 311, which is inclined from bottom to top toward the side close to the button ring shape core pulling 21b, and the matching seat A32 has an inclined guide cavity A321 for inserting the driving block A31. When the upper mold core pulling plate 212 moves downward and is pressed against the upper mold plate 213, the driving blocks A31 in each core pulling driving group A3 are simultaneously inserted downward into their respective inclined guide cavities A321 and the matching seat A32 is pushed inward by the inclined guide surface 311, so that each button ring shape core pulling 21b can be driven to move toward the center at the same time and form a button ring forming ring surface 21c. Specifically, the first upper mold also includes an upper fixed plate, an upper mold core pulling plate and an upper mold plate. The upper fixed plates of the two upper molds are connected to a pedestal, and the pedestal can drive the opening and closing actions of the two upper molds.

[0033] Specifically, the second lower mold 22 includes a lower mold plate 221 and a lower fixed plate 222, the lower mold core 23 is arranged on the lower mold plate 221, and a matching seat B42 is further provided on the lower mold plate 221, and the inner shell molding core pulling 23b is connected to the matching seat B42 (the inner shell molding core pulling 23b and the matching seat B42 can be integrally formed, or connected by screws, buckles, etc., and can be achieved by providing a clamping block on the end of the inner shell molding core pulling 23b and a clamping groove on the matching seat B42, or providing a clamping groove on the end of the inner shell molding core pulling 23b and a clamping block on the matching seat B42, and the clamping block is installed in the clamping groove to realize the button inner shell molding core pulling 23 b is connected to the mating seat B42, so that the mating seat B42 can drive the inner shell molding core pull 23b inward or slide inward. The clamping block can be a T-shaped block or an L-shaped block, and the clamping slot is a T-shaped slot or an L-slot. The mating seat B42 has an inclined guide cavity B421. At least one driving block A31 is extended downward and can be inserted into the inclined guide cavity B421. When the second upper mold 21 and the second lower mold 22 are closed, the extended driving block A31 is inserted downward into the inclined guide cavity B421 and the mating seat B42 is pushed inward by the inclined guide surface 311, which can drive the inner shell molding core pull 23b to move toward the center and cooperate with the inner shell molding mold base 23a to form the inner shell molding ring surface 23c. Of course, another driving block B that cooperates with the mating seat B42 can also be provided to realize the drive of the inner shell molding core pull 23b. Specifically, there are multiple inner shell molding core pulls 23b. The lower mold plate 221 also has multiple escape grooves 2211 for accommodating the remaining driver blocks A31 not inserted into the corresponding oblique guide cavities B421. Specifically, the first lower mold also includes a lower mold plate 221 and a lower fixing plate 222. The first upper mold corresponding to the first lower mold also has an extended driver block A31 or driver block B that can be inserted into the oblique guide cavities B421.

[0034] The utility model adopts two-color injection molding, with the first color being the inner shell (PC material) and the second color being the button ring (ABS material). The first color is the inner shell, and three point gates are used for pouring to ensure the roundness of the product. The second color is the button ring, and the point gate is converted to three latent gates, with the gate positions evenly distributed to ensure the roundness of the product. Taking advantage of the good fusion of ABS and PC materials, the button ring and the inner shell are directly injection molded together, eliminating the need for manual assembly, thus solving the problems of long manual assembly cycles, high costs, and difficult assembly process control. Furthermore, by directly injection molding the button ring and the inner shell together, the bonding is more reliable, and the problems of shaking and poor stability during long-term use are also solved, thus meeting product quality requirements.

[0035] When in use, first close the mold once, insert the inner shell molding mold core 11a into the inner shell molding mold base 23a, inject the first color material into the first color injection mold group 1, and the inner shell molding mold core 11a forms the inner circumference of the injection-molded inner shell. The inner shell molding ring surface 23c formed by the inner shell molding core 23b and the inner shell molding mold base 23a is used to form the outer circumference of the injection-molded inner shell. The block molding cavity 23b1 is used to mold the block 11 on the inner shell. ， The ridge 23b2 is used to form the long groove 12 on the inner shell. ， ;

[0036] After that, the mold is opened once, but the injection-molded inner shell is not ejected. By rotating the turntable, the first lower mold 12 with the injection-molded inner shell and the empty second lower mold 22 can be interchanged. The original first lower mold with the injection-molded inner shell is transformed into the second lower mold corresponding to the second upper mold, and the original empty second lower mold is transformed into the first lower mold corresponding to the first upper mold.

[0037] After the second mold closing, the upper mold core pulling plate 212 of the second upper mold 21 can be driven to move downward relative to the upper mold plate 213. At this time, the driving blocks A31 in each core pulling driving group A3 are simultaneously inserted downward into their respective inclined guide cavities A321 and the matching seats A32 are pushed inward by the inclined guide surface 311, so that each button ring molding core pulling 21b can be driven to move toward the center at the same time and form a button ring molding ring surface 21c; after the upper mold core pulling plate 212 is pressed downward with the upper mold plate 213, it can drive the upper mold plate 213 to move downward together to achieve alignment with the second lower mold 2 2, when closing the mold, the extended driving block A31 is inserted downward into the inclined guide cavity B421 and the inclined guide surface 311 pushes the matching seat B42 inward, which can drive the inner shell molding core 23b to move toward the center and cooperate with the inner shell molding mold base 23a to form the inner shell molding ring surface 23c; the second color material is injected into the second color injection mold assembly 2, the button ring molding mold core 21a forms the inner circumference of the injection button ring, and the button ring molding ring surface 21c forms the outer circumference of the injection button ring, and the convex molding surface 21b1 is used to form the convex pattern 21 on the outer circumference of the button ring. ， ;

[0038] Then the mold is opened for the second time. First, the upper fixed plate 211A can drive the upper mold core pulling plate 212 to move upward. When the upper mold core pulling plate 212 moves upward relative to the upper mold plate 213, the driving blocks A31 in each core pulling driving group A3 simultaneously leave their respective inclined guide cavities A321 upward. At this time, there is space for each button ring molding core pulling 21b to move outward to withdraw from the injection molded button ring; after the upper mold core pulling plate 212 moves up to a certain extent, it also pulls the upper mold plate 213 through the pull rod. At this time, the upper template 213 will move up together with the upper mold core pulling plate 212 to complete the opening of the second upper mold 21 and the second lower mold 22. When the second upper mold 21 and the second lower mold 22 are opened, the extended driving block A31 moves upward away from the inclined guide cavity B421. At this time, there is space for the inner shell molding core pulling 23b to move outward to withdraw from the injection molded inner shell. The space for the core pulling to move outward makes it easy to eject the product upward after the mold is opened. The injection molding machine only completes the ejection and demoulding once.

[0039] It should be noted that in the description of the present invention, all directional indications (such as up, down, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0040] In addition, terms such as "first," "second," "A," and "B" in this utility model are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the quantity of the technical features indicated. In the description of this utility model, "several" or "a plurality" means at least two, for example, two or three, unless otherwise specifically defined.

[0041] In the description of this utility model, unless otherwise expressly specified or limited, the terms "installed," "connected," "coupled," "connected," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

Claims

1. An injection mold for an automobile knob assembly, characterized in that: The invention comprises a first color injection molding module (1) and a second color injection molding module (2), wherein the first color injection molding module (1) comprises a first upper mold (11) and a first lower mold (12) which are arranged opposite to each other, and the second color injection molding module (2) comprises a second upper mold (21) and a second lower mold (22) which are arranged opposite to each other, the first upper mold (11) and the second upper mold (21) can perform synchronous opening / closing actions, the first lower mold (12) and the second lower mold (22) have the same structure and can realize position conversion, the first upper mold (11) and the first lower mold (12) can cooperate to injection-mold an inner shell; after the first lower mold (12) with the injection-mold inner shell is interchanged with the empty second lower mold (22), the button ring can be injection-molded by cooperating with the second upper mold (21); The first upper mold (11) is provided with a first upper mold core (111), the first upper mold core (111) is provided with an inner shell molding core (11a), the first lower mold (12) and the second lower mold (22) are both provided with lower mold cores (23), the lower mold core (23) is provided with an inner shell molding mold base (23a) and a movable inner shell molding core pull (23b), the inner shell molding core (11a) is used to mold the inner peripheral surface of the injection-molded inner shell, the inner shell molding core pull (23b) cooperates with the inner shell molding mold base (23a) to form an inner shell molding ring surface (23c) capable of molding the outer peripheral surface of the injection-molded inner shell, the molding surface of the inner shell molding core pull (23b) is provided with a block molding cavity (23b1) and a convex strip (23b2) for molding a long groove, The second upper mold (21) is provided with a second upper mold core (211), and the second upper mold core (211) has a button ring molding mold core (21a) and a plurality of movable button ring molding core pulls (21b). The button ring molding mold core (21a) is used to mold the inner circumference of the injection-molded button ring, and the plurality of button ring molding core pulls (21b) cooperate to form a button ring molding ring surface (21c) capable of molding the outer circumference of the injection-molded button ring. The molding surface of the button ring molding core pulls (21b) has a convex molding surface (21b1).

2. The automobile knob assembly injection mold according to claim 1, characterized in that: The second upper mold (21) comprises an upper fixed plate (211A), an upper mold core pulling plate (212) and an upper mold plate (213) which are arranged in sequence from top to bottom. The upper mold core pulling plate (212) can also be moved upward and separated relative to the upper mold plate (213). The second upper mold core (211) is arranged on the upper mold plate (213). Each button ring modeling core pulling (21b) is driven by a corresponding core pulling driving group A (3). The core pulling driving group A (3) comprises a driving block A (31) located on the upper mold core pulling plate (212) and a matching seat A (32) located on the upper mold plate (213). The button ring modeling core pulling (21b) and the matching seat A (32) are connected to each other. ), the driving block A (31) is provided with an inclined guide surface (311), the inclined guide surface (311) is inclined from bottom to top toward the button ring molding core pulling (21b) side, the matching seat A (32) is provided with an inclined guide cavity A (321) for the driving block A (31) to be inserted, when the upper mold core pulling plate (212) moves downward and is pressed with the upper mold plate (213), the driving blocks A (31) in each core pulling driving group A (3) are simultaneously inserted downward into their respective inclined guide cavities A (321) and the matching seat A (32) is pushed inward by the inclined guide surface (311), so that each button ring molding core pulling (21b) can be driven to move toward the center at the same time and surround the button ring molding ring surface (21c).

3. The automobile knob assembly injection mold according to claim 2, characterized in that: The second lower mold (22) comprises a lower mold plate (221) and a lower fixed plate (222). The lower mold core (23) is arranged on the lower mold plate (221). A matching seat B (42) is also arranged on the lower mold plate (221). The inner shell molding core puller (23b) is connected to the matching seat B (42). The matching seat B (42) has an inclined guide cavity B (421). At least one driving block A (31) is extended downward and can be inserted into the inclined guide cavity B (421). When the second upper mold (21) and the second lower mold (22) are molded together, the extended driving block A (31) is inserted downward into the inclined guide cavity B (421) and the matching seat B (42) is pushed inward by the inclined guide surface (311), which can drive the inner shell molding core puller (23b) to move toward the center and cooperate with the inner shell molding mold seat (23a) to form an inner shell molding ring surface (23c).

4. An automobile knob assembly injection mold according to claim 1, 2 or 3, characterized in that: A plurality of inner shell molding core pullers (23b) are provided.

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