Injection molding device for automobile interior moldings

Abstract

The present invention discloses an injection molding device for automotive interior moldings, which relates to the field of molding processing, and includes a housing, and a die and a punch slidably mounted on the housing. The device is characterized in that it further includes: a transmission assembly disposed within the housing, one end of the transmission assembly being connected to the die, and the other end of the transmission assembly being connected to the punch; when the injection nozzle moves toward the mold, the die and punch are driven toward each other to close the mold, and the injection nozzle injects mold liquid, thereby achieving injection molding. The device for automotive interior molding provided by the present invention has the following advantages: during the injection molding stroke of the injection nozzle into the mold, that is, during the injection molding process, the injection nozzle moves in the horizontal direction of the housing, thereby causing the injection nozzle to abut against the punch or the housing, thereby causing the transmission assembly to drive the die or the punch to close the mold in the horizontal direction, thereby shortening the mold closing time.

Description

Technical Field

[0001] The invention relates to an injection molding process technology, and in particular to an injection molding device for automobile interior moldings. Background Art

[0002] Injection molding is a method for producing industrial products. Rubber and plastic injection molding are commonly used. Injection molding can be further categorized into compression molding and die casting. An injection molding machine (abbreviated as injection molding machine or injection molding machine) is the primary molding equipment used to create various shapes of plastic products from thermoplastics or thermosetting materials using plastic molding molds. Injection molding is accomplished using an injection molding machine and molds. For example, in the production of automotive interiors, a molten plastic solution is injected into a mold and then cooled to form the resulting injection molded parts.

[0003] In an invention patent application with publication number CN110142939A, published on August 20, 2019, and entitled "A High-Precision and High-Efficiency Injection Molding Machine," a machine body is disclosed, along with a movable platen, a fixed platen, and an injection mechanism, each mounted thereon. Multiple tie rods are mounted between the movable and fixed platens, and a combined brake mechanism corresponding to the tie rods is mounted on the movable platen. A nitrogen-assisted injection device connected to the injection mechanism is mounted on the side end of the machine body, and the combined brake mechanism locks the tie rods during mold closing. The combined brake mechanism includes a brake cylinder and multiple mold-locking pistons, each connected to one of the mold-locking pistons, with a piston-linking connecting rod eccentrically hingedly mounted between adjacent mold-locking pistons. The high-precision and high-efficiency injection molding machine of the present invention features fast mold change speed, excellent combined mold-locking effect, and high reliability and safety. The entire machine also boasts a fast startup, stable injection rate, and high repeatability. It also boasts a large mold capacity, high production efficiency, and stable and reliable operation.

[0004] In the prior art including the above-mentioned patent, during the injection molding process, generally one of the molds is a fixed mold and the other mold is a movable mold. A driving mechanism is required to drive the female mold or the male mold to move toward the male mold or the female mold, thereby achieving mold closing and then injection molding. Therefore, the moving path of the movable mold is longer and the time consumed will be extended. Summary of the Invention

[0005] The object of the present invention is to provide an injection molding device for automobile interior moldings to solve the above-mentioned deficiencies in the prior art.

[0006] In order to achieve the above object, the present invention provides the following technical solutions:

[0007] A device for molding automotive interior moldings comprises a housing, a die and a punch slidably mounted on the housing, and a transmission assembly disposed within the housing, one end of the transmission assembly being connected to the die, and the other end of the transmission assembly being connected to the punch; when an injection nozzle moves toward a mold part, the die and punch are driven toward each other to close the mold, and the injection nozzle injects mold liquid, thereby achieving injection molding.

[0008] Preferably, it further comprises: two mold bases, each mold base is slidably connected to the shell, one of the mold bases is detachably connected to a female mold, and the other mold base is detachably connected to a male mold.

[0009] The transmission assembly includes a gear rotatably connected to the housing and racks whose ends are fixedly connected to each mold base, and the two racks are respectively engaged with the gears.

[0010] Preferably, a torsion spring is coaxially sleeved on the transmission shaft of the gear, one leg of the torsion spring is fixedly connected to the transmission shaft, and the other leg of the torsion spring is fixedly connected to the housing.

[0011] Preferably, a sliding seat is slidably connected to the male mold, and the sliding seat is used to demould the injection molded part.

[0012] Preferably, the punch and the sliding seat are connected via a plurality of first springs.

[0013] Preferably, two connecting blocks are provided on the sliding seat, and a through groove adapted to each connecting block is provided on the male mold at a position corresponding to each connecting block.

[0014] Preferably, a locking assembly is provided between the punch and the sliding seat, and the locking assembly is unlocked during the reset stroke of the punch, thereby allowing the sliding seat to move relative to the punch to realize demoulding of the injection molded part.

[0015] Preferably, the locking assembly includes a clamping block slidably connected to each connecting block, the clamping block is connected to the connecting block via a second spring, and a clamping groove adapted to the clamping block is provided at a position corresponding to each clamping block on the punch.

[0016] Preferably, two abutment rods are fixedly connected in the shell. When the punch is reset to the initial position, each abutment rod abuts against the block, thereby unlocking the sliding seat.

[0017] In the above technical solution, the present invention provides an injection molding device for automobile interior molding parts, which moves in the horizontal direction of the shell during the injection stroke of the injection nozzle into the mold, so that the injection nozzle abuts against the punch or die, and then the transmission component drives the die or punch to complete the mold closing in the horizontal direction, thereby shortening the mold closing time. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments described in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0019] Figure 1 A schematic structural diagram of the demoulding positions of the concave and convex molds provided in an embodiment of the present invention;

[0020] Figure 2 A schematic structural diagram of the clamping position of the female mold and the male mold provided in an embodiment of the present invention;

[0021] Figure 3 A schematic diagram of the installation structure of the injection nozzle provided in an embodiment of the present invention;

[0022] Figure 4 A schematic diagram of the installation structure of the abutment rod provided in an embodiment of the present invention;

[0023] Figure 5 A schematic diagram of the structure of a gear provided in an embodiment of the present invention;

[0024] Figure 6 A schematic structural diagram of a male mold provided in an embodiment of the present invention;

[0025] Figure 7 A schematic diagram of the installation structure of the sliding seat provided in an embodiment of the present invention;

[0026] Figure 8 A schematic diagram of the installation structure of the second spring provided in an embodiment of the present invention;

[0027] Figure 9 A schematic structural diagram of a sliding seat provided in an embodiment of the present invention;

[0028] Figure 10 A schematic structural diagram of a die according to an embodiment of the present invention.

[0029] Description of reference numerals:

[0030] 1. Housing; 1.00. Waist-shaped groove; 1.1. Mold base; 1.10. Connecting protrusion; 1.11. Rack; 1.12. Gear; 1.120. Torsion spring; 1.2. Abutment rod; 1.3. Die; 1.4. Punch; 1.40. Slot; 1.41. Sliding seat; 1.410. Connecting block; 1.411. Slot; 1.412. First spring; 1.413. Mounting groove; 1.42. Second spring; 2. Injection nozzle. DETAILED DESCRIPTION

[0031] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0032] Reference Figure 1-10 As shown, the present invention provides an injection molding device for automobile interior moldings, comprising a housing 1, a female mold 1.3 and a male mold 1.4 slidably mounted on the housing 1, and further comprising:

[0033] Transmission assembly: It is arranged in the housing 1, one end of the transmission assembly is connected to the female die 1.3, and the other end of the transmission assembly is connected to the male die 1.4;

[0034] When the injection nozzle 2 injects into the mold part, the female mold 1.3 and the male mold 1.4 move toward each other to close the mold, and the injection nozzle injects the mold liquid, thereby realizing injection molding.

[0035] Specifically, such as Figure 1 and 2 As shown, a die 1.3 and a punch 1.4 are horizontally slidably connected in the housing 1, and two sliding doors are slidably connected to the housing 1. The die 1.3 and the punch 1.4 have a first position for mold closing and a second position for demoulding. The die 1.3 and the punch 1.4 are arranged in a one-to-one correspondence, and the die 1.3 and the die 1.3 move toward each other in the horizontal direction to the first position for mold closing, and the die 1.3 and the punch 1.4 move away from each other in the horizontal direction to the second position for demoulding. In this embodiment, the die 1.3 and the punch are arranged in a one-to-one correspondence to each other. 1.4 are the initial positions of the die 1.3 and the punch 1.4 when they are demoulded. Secondly, the die 1.3 and the punch 1.4 can be selected according to the needs of injection molding, and are not limited to the die 1.3 and the punch 1.4 shown in the figure of the present invention. Of course, in this embodiment, in order to be able to transport the injection molded parts from the shell 1 after injection molding to the shell 1, a wheeled tree hole mechanism can be installed at the bottom of the shell, and the driving wheel conveying mechanism is driven by a motor (not shown in the figure).

[0036] like Figure 3 As shown, a gate is provided at the center of the female mold 1.3, so that the injection nozzle 2 can inject the molten injection liquid into the mold cavity formed by the female mold 1.3 and the male mold 1.4. Figure 2 As shown, since the die 1.3 and the punch 1.4 are driven by the injection nozzle 2 in the first position of the mold closing, a through hole adapted to the injection nozzle 2 is opened on the side wall of the shell 1, and a gate is provided on the die 1.3, through which mold liquid is injected into the mold cavity. After the mold liquid is cooled and formed, the abutting force of the injection nozzle 2 on the die 1.3 disappears, and then under the action of the transmission component, the die 1.3 and the punch 1.4 are moved from the first position of the mold closing to the second position of the die 1.3 and the punch 1.4 are demolded, thereby completing an injection molding process.

[0037] Transmission assembly: It is arranged in the shell 1, one end of the transmission assembly is connected to the die 1.3, and the other end of the transmission assembly is connected to the punch 1.4; the transmission assembly is installed in the shell 1, and the transmission assembly converts the horizontal movement into the horizontal movement. In the prior art, the mechanisms that can convert the horizontal movement into the horizontal movement include the gear 1.12 rack 1.11 transmission mechanism, the wedge-shaped abutment structure, the connecting rod transmission mechanism or other mechanisms that can convert the horizontal movement into the linear movement are applicable to this embodiment.

[0038] During use, when the injection nozzle 2 is inserted into the housing 1 through the through hole on the housing 1, the injection nozzle 2 directly abuts against the female mold 1.3 in the housing 1, so that the injection nozzle 2 pushes the female mold 1.3 to move in the horizontal direction toward the direction close to the punch 1.4, and the female mold 1.3 triggers the movement of the transmission assembly, so that the transmission assembly drives the punch 1.4 to move in the direction close to the female mold 1.3 until the female mold 1.3 and the punch 1.4 move from the second demoulding position to the first position (that is, from the second demoulding position to the first position). Figure 1 Move to the position Figure 2 ), at this time, the melted injection liquid in the injection nozzle 2 is injected into the mold cavity formed between the female mold 1.3 and the male mold 1.4, thereby realizing injection molding of the female mold 1.3; after the injection molding is completed and the injection molded part in the mold cavity is cooled and formed, the injection nozzle 2 is reset, and the abutment between the injection nozzle 2 and the female mold 1.3 disappears, so that the transmission assembly drives the female mold 1.3 and the male mold 1.4 to move from the first mold closing position to the second mold demolding position.

[0039] The present invention provides an injection molding device for automobile interior molding parts. During the injection stroke of the injection nozzle 2 into the mold, that is, the injection nozzle 2 moves in the horizontal direction of the shell 1 during the injection process, so that the injection nozzle 2 abuts the punch 1.4 or the die 1.3, and then the transmission component drives the die 1.3 or the punch 1.4 to complete the mold closing in the horizontal direction. Then, the injection nozzle 2 injects the molten plastic into the mold to form the injection molded part, thereby shortening the mold closing time.

[0040] Reference Figure 1-5 As shown, another embodiment provided by the present invention further includes: two mold bases 1.1, each mold base 1.1 is slidably connected to the shell 1, one of the mold bases 1.1 is detachably connected to the female mold 1.3, and the other mold base 1.1 is detachably connected to the male mold 1.4.

[0041] The transmission assembly includes a gear 1.12 rotatably connected to the housing 1 and racks 1.11 whose ends are fixedly connected to the mold bases 1.1, and the two racks 1.11 are respectively engaged with the gear 1.12.

[0042] A torsion spring 1.120 is coaxially sleeved on the transmission shaft of the gear 1.12. One leg of the torsion spring 1.120 is fixedly connected to the transmission shaft, and the other leg of the torsion spring 1.120 is fixedly connected to the housing 1.

[0043] A sliding seat 1.41 is slidably connected to the punch 1.4, and the sliding seat 1.41 is used to demould the injection molded part.

[0044] The punch 1.4 and the sliding seat 1.41 are connected via a plurality of first springs 1.412.

[0045] Two connecting blocks 1.410 are provided on the sliding seat 1.41, and a through slot adapted to each connecting block 1.410 is provided on the punch 1.4 at a position corresponding to each connecting block 1.410.

[0046] Specifically, the shell 1 has two waist-shaped grooves 1.00 symmetrically provided with its longitudinal midline as a mirror line, and each mold base 1.1 is fixedly connected with a connecting protrusion 1.10 adapted to the waist-shaped groove 1.00 at a position corresponding to each waist-shaped groove 1.00, so that each mold base 1.1 can slide in the horizontal direction inside the shell 1, and each mold base 1.1 has two convex sliding grooves, and the side walls of the die 1.3 and the punch 1.4 have a convex sliding block adapted to the convex sliding groove at a position corresponding to each convex sliding groove, so that the die 1.3 or the punch 1.4 can be detachably connected to the mold base 1.1 set accordingly.

[0047] A gear 1.12 is rotatably connected inside the housing 1, and a torsion spring 1.120 is sleeved on the outside of the transmission shaft of the gear 1.12. One of the legs of the torsion spring 1.120 is fixedly connected to the transmission shaft, and the other leg of the torsion spring 1.120 is fixedly connected to the housing 1. A rack 1.11 is meshed on the upper and lower sides of the gear 1.12, and the ends of each rack 1.11 are respectively fixedly connected to the mold base 1.1 set accordingly.

[0048] During use, when the injection nozzle 2 is inserted into the shell 1 through the through hole on the shell 1, the injection nozzle 2 directly abuts against the female mold 1.3 in the shell 1, so that the injection nozzle 2 pushes the female mold 1.3 to move in the horizontal direction toward the direction close to the punch 1.4, so that the female mold 1.3 drives the mold base 1.1 connected to it to move in the horizontal direction during the movement, so that the female mold 1.3 and the mold base 1.1 drive the rack 1.11 to move, and so that the rack 1.11 drives the corresponding gear 1.12 to move during the movement. At this time, the torsion spring 1.120 on the gear 1.12 accumulates force, so that the mold base 1.1 connected to the punch 1.4 moves in the direction close to the female mold 1.3 under the action of the gear 1.12, so that the female mold 1.3 and the punch 1.4 move from the second demolding position to the first mold closing position, and the injection nozzle 2 opens to inject mold liquid into the mold cavity.

[0049] Reference Figure 6-10 As shown, in another embodiment provided by the present invention, a locking assembly is provided between the punch 1.4 and the sliding seat 1.41, and the locking assembly is unlocked during the return stroke of the punch 1.4, thereby allowing the sliding seat 1.41 to move relative to the punch 1.4 to realize demoulding of the injection molded part.

[0050] Among them, the locking assembly includes a card block 1.411 slidably connected to each connecting block 1.410, and the card block 1.411 is connected to the connecting block 1.410 through a second spring 1.42. A card slot 1.40 adapted to the card block 1.411 is provided at a position corresponding to each card block 1.411 on the punch 1.4.

[0051] Two abutment rods 1.2 are fixedly connected to the housing 1. When the punch 1.4 is reset to its initial position, each abutment rod 1.2 abuts against the clamping block 1.411, thereby unlocking the sliding seat 1.41.

[0052] Specifically, a connecting block 1.410 is horizontally slidably connected to the male mold 1.4. The connecting block 1.410 separates the injection molded part on the male mold 1.4 from the male mold 1.4 after the female and male molds 1.4 are demoulded. Figure 8As shown, the connecting block 1.410 has two clamping blocks 1.411, and the punch 1.4 is provided with a through-connection groove 1.40 adapted to each clamping block 1.411, and the position where the clamping block 1.411 is connected to the punch 1.4 can be sealed by a rubber ring to prevent leakage of the mold liquid during the injection molding process. The connecting block 1.410 and the punch 1.4 are connected by a first spring 1.412 on all sides, and a clamping groove 1.40 is correspondingly provided on the punch 1.4. Each clamping block 1.411 is provided with a mounting groove 1.413, and a second spring 1.42 is fixedly connected in the mounting groove 1.413. The end of each second spring 1.42 is fixedly connected in the clamping block 1.411, and the clamping block 1.411 is provided with a wedge-shaped surface or an arc surface on the side close to the punch 1.4, as shown in FIG. Figure 9 shown.

[0053] like Figure 3 As shown, an abutment rod 1.2 is fixedly connected to the upper and lower sides of the housing 1, and the end of the abutment rod 1.2 can just abut against each block 1.411. The punch 1.4 and the upper and lower sides of the die base 1.1 connected to the punch 1.4 are provided with horizontal abutment grooves at the positions corresponding to each block 1.411. The punch 1.4 is provided with a card slot 1.40 adapted to the card block 1.411 on both the upper and lower sides. Figure 6 shown.

[0054] During use, when the injection nozzle 2 is inserted into the housing 1 through the through hole on the housing 1, the injection nozzle 2 directly abuts against the female mold 1.3 in the housing 1, so that the injection nozzle 2 pushes the female mold 1.3 to move in the horizontal direction toward the direction close to the punch 1.4, so that the female mold 1.3 drives the mold base 1.1 connected thereto to move in the horizontal direction during the movement, and then the female mold 1.3 and the mold base 1.1 drive the rack 1.11 to move, and then the rack 1.11 drives the corresponding gear 1.12 to move during the movement, and at this time the torsion spring 1.120 on the gear 1.12 accumulates force, so that The punch 1.4 and the mold base 1.1 connected thereto are moved toward the die 1.3 by the action of the gear 1.12. As the die 1.3 and the punch 1.4 move from the second demolding position to the first mold closing position, the die 1.3 abuts against the sliding surface, causing the sliding surface to compress each first spring 1.412. After each first spring 1.412 is compressed to its maximum deformation, the clamping block 1.411 on each connecting block 1.410 is inserted into the corresponding clamping groove 1.40, thereby locking the sliding seat 1.41 and limiting its position. The injection nozzle 2 is opened to inject mold liquid into the mold cavity.

[0055] After the mold liquid is cooled and formed, the injection nozzle 2 is reset, so that the abutment force of the injection nozzle 2 on the die 1.3 gradually decreases until it disappears. At this time, the torsion spring 1.120 has a drive to restore the original state, so that the gear 1.12 turns and drives the racks 1.11 to move, and then the racks 1.11 drive the die 1.3 and the punch 1.4 to move toward the demolding position, until the punch 1.4 and the corresponding mold base 1.1 move to the position of the abutment rods 1.2, so that the punch 1.4 and the corresponding mold base 1.1 move to the position of the abutment rods 1.2. The mold 1.4 and the corresponding mold base 1.1 move relative to each other, causing each abutting rod 1.2 to abut against the clamping block 1.411, so that each clamping block 1.411 moves toward the installation groove 1.413 and compresses the second spring 1.42 until each clamping block 1.411 is completely inserted into the installation groove 1.413, so that the elastic force generated by each first spring 1.412 pushes the sliding seat 1.41 to move, and then the sliding seat 1.41 separates the injection molded part from the punch 1.4.

[0056] The above description is merely illustrative of certain exemplary embodiments of the present invention. It goes without saying that those skilled in the art will be able to modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and description are illustrative in nature and should not be construed as limiting the scope of protection of the claims.

Claims

1. An injection molding device for automobile interior moldings, comprising a housing (1) and a concave mold (1.3) and a convex mold (1.4) slidably mounted on the housing (1), characterized in that: Also includes: A transmission assembly is arranged in the housing (1), one end of the transmission assembly is connected to the female die (1.3), and the other end of the transmission assembly is connected to the male die (1.4); The injection nozzle moves toward the mold part, driving the concave mold (1.3) and the convex mold (1.4) to move toward each other to close the mold, and then the injection nozzle injects the mold liquid, thereby achieving injection molding; A sliding seat (1.41) is slidably connected to the male mold (1.4), and the sliding seat (1.41) is used for demoulding the injection molded part; The punch (1.4) and the sliding seat (1.41) are connected via a plurality of first springs (1.412); two connecting blocks (1.410) are provided on the sliding seat (1.41); and a through groove adapted to each connecting block (1.410) is provided on the punch (1.4); A locking assembly is provided between the punch (1.4) and the sliding seat (1.41), and the locking assembly is unlocked during the return stroke of the punch (1.4), thereby allowing the sliding seat (1.41) to move relative to the punch (1.4) to demould the injection molded part; The locking assembly comprises a clamping block (1.411) slidably connected to each connecting block (1.410), the clamping block (1.411) being connected to the connecting block (1.410) via a second spring (1.42), and a clamping groove (1.40) adapted to the clamping block (1.411) being provided at a position corresponding to each clamping block (1.411) on the punch (1.4); Two abutment rods (1.2) are fixedly connected inside the housing (1); after injection molding is completed, the injection nozzle moves in a reset direction, and the female mold (1.3) and the male mold (1.4) move relative to each other in a separation direction to reset; when the male mold (1.4) is reset to an initial position, each abutment rod (1.2) abuts against the clamping block (1.411), thereby unlocking the sliding seat (1.41).

2. The injection molding device for automobile interior molding according to claim 1, characterized in that: Also includes: Two mold bases (1.1), each mold base (1.1) is slidably connected to the housing (1), one of the mold bases (1.1) is detachably connected to a concave mold (1.3), and the other mold base (1.1) is detachably connected to a convex mold (1.4).

3. The device for molding automobile interior moldings according to claim 1, characterized in that: The transmission assembly comprises a gear (1.12) rotatably connected to the housing (1) and a rack (1.11) whose ends are respectively fixedly connected to each mold base (1.1), and the two racks (1.11) are respectively engaged with the gear (1.12).

4. The device for molding automobile interior moldings according to claim 3, characterized in that: A torsion spring (1.120) is coaxially sleeved on the transmission shaft of the gear (1.12), one leg of the torsion spring (1.120) is fixedly connected to the transmission shaft, and the other leg of the torsion spring (1.120) is fixedly connected to the housing (1).

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