Horizontal injection mold for automobile front bumper trim

Abstract

The present application relates to a horizontal injection mold. It solves the defects of unreasonable design in the prior art. The horizontal injection mold includes a fixed mold and a movable mold, a material injection port is arranged on the fixed mold, a cantilever type core pin is arranged on the fixed mold and protrudes towards the movable mold, a decorative strip forming cavity is arranged on the cantilever type core pin, the cavity wall of the decorative strip forming cavity is shaped to an outer decorative surface and a circumferential decorative surface, a concave mold core is arranged on the movable mold and is above the cantilever type core pin when the mold is closed, the concave mold core has a forming surface shaped to a parting surface, a shaped structure is arranged on the concave mold core and is shaped to a remaining structure of a back surface of a front bumper decorative strip of an automobile, the decorative strip forming cavity, the forming surface and the shaped structure form a product forming cavity, a multi-stage ejecting mechanism is arranged on the movable mold and makes the product remain in the decorative strip forming cavity when the movable mold is opened, and the product is forced to separate from the decorative strip forming cavity by pulling the remaining structure. The present application has the advantages of ensuring stable quality of demolded products.

Description

Technical Field

[0001] This invention belongs to the field of automotive parts manufacturing technology, and in particular relates to a horizontal injection mold for automotive front bumper trim strips. Background Technology

[0002] like Figure 1 As shown, the car front bumper trim strip has an outer trim surface (outer arc convex surface) and a circumferential trim surface (two side surfaces) connecting the outer trim surface. The circumferential trim surface ends at the mold parting surface. The existing injection mold includes an upper moving mold and a lower stationary mold, which are distributed vertically. When the moving mold opens, the ejector pin contacts the trim surface of the trim strip, thereby causing the trim strip to be demolded from the lower stationary mold. Finally, the material is removed.

[0003] Based on the quality requirements of the decorative strip for the decorative surface, the existing molds mentioned above will scratch the decorative surface during mold opening, and will also come into contact with the decorative surface during the final material removal, which also has the defect of scratching and pinching the decorative surface. Summary of the Invention

[0004] The purpose of this invention is to address the above-mentioned problems by providing a horizontal injection mold for automotive front bumper trim strips that can solve the aforementioned technical issues.

[0005] To achieve the above objectives, the present invention adopts the following technical solutions: The decorative strip has an outer decorative surface and a circumferential decorative surface connecting the outer decorative surface, the circumferential decorative surface ending at the mold parting surface.

[0006] This horizontal injection mold for automotive front bumper trim strips includes a fixed mold and a moving mold arranged horizontally. The fixed mold has an injection port and a cantilevered punch protruding towards the moving mold. The cantilevered punch has a trim strip forming cavity, the cavity wall of which conforms to the outer trim surface and the circumferential trim surface. The moving mold has a die core positioned above the cantilevered punch when the mold is closed. The die core has a forming surface conforming to the mold parting surface. The die core also has a conforming structure conforming to the remaining structure on the back of the automotive front bumper trim strip. The trim strip forming cavity, the forming surface, and the conforming structure form a product forming cavity. The moving mold has a multi-stage ejector mechanism that retains the product in the trim strip forming cavity when the moving mold opens, and forces the product out of the trim strip forming cavity by pulling the remaining structure.

[0007] In the above-mentioned horizontal injection mold for automotive front bumper trim strips, the cantilever punch core has an arc-shaped matching concave surface, and the concave core has an arc-shaped matching convex surface that can match the arc-shaped matching concave surface. At least one trim strip forming cavity is provided on the arc-shaped matching concave surface, and at least one contouring structure is provided on the arc-shaped matching convex surface.

[0008] In the aforementioned horizontal injection mold for automotive front bumper trim strips, a first arc-shaped structure is provided on the arc-shaped matching concave surface, located on the outer side of the two ends of the trim strip forming cavity along its length. A second arc-shaped structure is provided on the arc-shaped matching convex surface, which can match the first arc-shaped structure one by one. One of the first arc-shaped structure and the second arc-shaped structure is a concave structure, and the other is a convex structure.

[0009] In the above-mentioned horizontal injection mold for automotive front bumper trim strip, a raised rib is provided on the upper side of the cantilever punch core to form a recessed groove with the arc-shaped matching concave surface, and an outer boss is provided on the upper side of the arc-shaped matching convex surface to match the recessed groove, and the second arc-shaped structure is provided on the outer boss.

[0010] In the above-mentioned horizontal injection mold for automotive front bumper trim strip, the horizontal injection mold for automotive front bumper trim strip further includes a primary ejector core group that moves linearly relative to the moving mold in a first axial direction and a secondary ejector core group located on the side of the primary ejector core group away from the fixed mold, as well as a drive component and a first control component having a first stage control position and a second stage control position. In the first stage control position when mold closing is cancelled, the primary ejector core group and the secondary ejector core group move synchronously; in the second stage control position when mold closing is cancelled, the primary ejector core group can move independently relative to the secondary ejector core group; the driving component drives the primary ejector core group to move closer to the secondary ejector core group; It also includes a second control component with alternating hook and unhooking positions. When in the hook position, the fixed mold drives at least the first-stage ejector core assembly to move through the second control component; when in the unhooking position, the fixed mold is completely separated from the moving mold.

[0011] In the aforementioned horizontal injection mold for automotive front bumper trim strips, there are two sets of the first control components, which are symmetrically distributed on opposite sides of the moving mold; there are two sets of the second control components, which correspond one-to-one with the first control components.

[0012] In the aforementioned horizontal injection mold for automotive front bumper trim strips, the first control component includes a first fixed seat fixed to the primary ejector core assembly, a first locking tongue groove distributed along a second axis perpendicular to the first axis on the first fixed seat, a first locking rod distributed along the first axis and having a first stop surface on the moving mold, and a first locking tongue that retracts and extends in a third axis direction perpendicular to the first axis on the secondary ejector core assembly. At least a portion of the first locking tongue is inserted into the first locking tongue groove, and a first stage control position is formed between the first stop surface and the first locking tongue. The stroke of the first locking tongue after it disengages from the first fixed seat is defined as the second stage control position.

[0013] In the aforementioned horizontal injection mold for automotive front bumper trim strips, the first stop surface is inclined, and a second stop surface with the same inclination direction as the first stop surface is provided on the first latch.

[0014] In the aforementioned horizontal injection mold for automotive front bumper trim strips, the second control component includes a traction rod with one end connected to the primary ejector core assembly, a hook at the other end of the traction rod, a traction seat slidably connected to the traction rod on the moving mold, a hook block on the fixed mold, and a cancellation mechanism between the traction seat and the traction rod that can cancel the connection when the hook is hooked onto the hook block. At least a portion of the cancellation mechanism is located on the traction seat, and the remaining portion is located on the traction rod.

[0015] In the aforementioned horizontal injection mold for automotive front bumper trim strips, the cancellation mechanism includes an unlocking component and an unlocking groove, with either the unlocking component or the unlocking groove located on the traction seat and the other located on the traction rod.

[0016] In the aforementioned horizontal injection mold for automotive front bumper trim strips, the unlocking element or the unlocking groove is provided on opposite sides of the traction rod, and each unlocking element corresponds to one unlocking groove.

[0017] In the aforementioned horizontal injection mold for automotive front bumper trim strips, the primary ejector core assembly includes a primary follower ejector plate. The primary follower ejector plate is provided with a plurality of primary ejector rods that are movably connected to the moving mold in the first axial direction and extend into the product molding cavity. A first contouring core block that conforms to the partial structure of the product is connected to one end of the primary ejector rod near the product molding cavity.

[0018] In the aforementioned horizontal injection mold for automotive front bumper trim strips, the secondary ejector core assembly includes a secondary follower ejector plate. The secondary follower ejector plate is provided with a plurality of secondary ejector rods that are movably connected to the moving mold and the primary follower ejector plate in the first axial direction and extend into the product molding cavity. A second contouring core block that conforms to the partial structure of the product is connected to one end of the secondary ejector rod near the product molding cavity.

[0019] In the aforementioned horizontal injection mold for automotive front bumper trim strips, the secondary ejector rod is an inclined secondary ejector rod, and the secondary ejector rod is fixedly connected to the secondary follower ejector plate via a support.

[0020] Compared with existing technologies, the advantages of this application are: Horizontal injection molding ensures that the final external force pulling the remaining structure is a lateral pull, which causes the decorative strip to detach from the molding cavity. This completely avoids defects such as top damage, scratches, or dents caused by material removal contact on the outer and circumferential decorative surfaces. Furthermore, the parting surface is formed by the molding surface on the mold core, which solves the problem of parting line marks on the circumferential decorative surface of the molded decorative strip, further ensuring the aesthetics and quality of the decorative strip.

[0021] The horizontal design allows the remaining structure to be directly exposed after detaching from the die core, while external force (such as a robotic arm) can directly grasp the remaining structure and move it away from the fixed mold, thus achieving complete demolding.

[0022] The design of the cantilever punch core allows the cantilever punch core to be suspended in the air, which facilitates the horizontal placement of the decorative strip formed on the cantilever punch core and allows for quick material removal without interference from external forces. At the same time, it can also significantly reduce the size of the entire mold to fit smaller injection molding machines and minimize manufacturing costs.

[0023] In the mold-closed state, the primary ejector core assembly and the secondary ejector core assembly are also part of the product molding cavity. When the mold closure is canceled (i.e., the mold is opened), the primary ejector core assembly and the secondary ejector core assembly also perform the function of resisting the front bumper trim strip and moving it with the fixed mold, and separating it from the moving mold. This allows the front bumper trim strip to move with the fixed mold multiple times during mold opening, so that the front bumper trim strip can be completely demolded from the moving mold. The fixed mold does not interfere with the end of removing the front bumper trim strip, and the end only needs to approach and grab the front bumper trim strip to achieve the final efficient material removal. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the decorative strip structure.

[0025] Figure 2 This is a schematic diagram of the three-dimensional structure of the horizontal injection mold provided by the present invention.

[0026] Figure 3 This is a side view structural diagram of the horizontal injection mold provided by the present invention.

[0027] Figure 4 yes Figure 3 Schematic diagram of the cross-sectional structure along line AA.

[0028] Figure 5 This is a schematic diagram of the second-view side view structure of the horizontal injection mold provided by the present invention.

[0029] Figure 6 yes Figure 5 Schematic diagram of the cross-sectional structure along the middle BB line.

[0030] Figure 7 This is a schematic diagram of the cantilever punch core structure provided by the present invention.

[0031] Figure 8 This is a schematic diagram of the structure after removing the fixed mold provided by the present invention.

[0032] Figure 9 This is a partial structural diagram of the control component provided by the present invention.

[0033] In the figure, the outer decorative surface 1a, the circumferential decorative surface 1b, the mold parting surface 1c, the remaining structure 1d, the fixed mold 1, the injection port 10, the cantilever punch core 11, the decorative strip forming cavity 12, the arc-shaped matching concave surface 13, the first arc-shaped structure 14, the raised rib 15, the moving mold 2, the concave mold core 20, the forming surface 21, the contouring structure 22, the arc-shaped matching convex surface 23, the second arc-shaped structure 24, the outer boss 25, the first-stage ejector core assembly 3, the first-stage following ejector plate 30, the first-stage ejector rod 31, the first contouring core block 32, and the second-stage... 4. Ejector core assembly, 40. Secondary follower ejector plate, 41. Secondary ejector rod, 42. Secondary contour core block, 43. Support, 5. Drive assembly, 6. First control assembly, 60. First fixing seat, 61. First locking tongue groove, 62. First locking rod, 620. First stopping surface, 630. First locking tongue, 63. Second control assembly, 7. Traction rod, 70. Hook, 71. Traction seat, 72. Unlocking component, 73. Unlocking groove, 74. Hook block, 75. First stage control position k1, second stage control position k2, hook position k3. Detailed Implementation

[0034] The following are specific embodiments of the invention, which are described in conjunction with the accompanying drawings. The technical solution of the invention will be further described, but the invention is not limited to these embodiments.

[0035] like Figure 1As shown, the decorative strip has an outer decorative surface 1a and a circumferential decorative surface 1b connecting the outer decorative surface 1a. The circumferential decorative surface 1b terminates at the mold parting surface 1c, and the remaining structure 1d is connected to the mold parting surface 1c.

[0036] like Figures 2-6 As shown, this horizontal injection mold for automotive front bumper trim strips includes a fixed mold 1, a moving mold 2, and a multi-stage ejection mechanism. The fixed mold 1 has an injection port 10 that connects to the product molding cavity. Cooling systems (existing technology), such as water cooling pipe systems, are respectively installed inside the fixed mold 1 and the moving mold 2. The cooling systems are used to cool and shape the product in the molding cavity.

[0037] The moving mold 2 moves relative to the fixed mold 1 to complete the mold closing and cancel the mold closing (mold opening).

[0038] like Figures 7-8 As shown, a cantilevered punch core 11 protruding towards the moving mold 2 is provided on the fixed mold 1. A decorative strip forming cavity 12 is provided on the cantilevered punch core 11, and the cavity wall of the decorative strip forming cavity 12 is shaped like an outer decorative surface 1a and a circumferential decorative surface 1b. A cavity core 20 is provided on the moving mold 2, which is located above the cantilevered punch core 11 when the mold is closed. The cavity core 20 has a forming surface 21 that is shaped like a mold closing parting surface 1c. A contouring structure 22 is provided on the cavity core 20 that is shaped like the remaining structure 1d on the back of the front bumper decorative strip of a car. The contouring structure 22 is such as a buckle ear, etc. The decorative strip forming cavity 12, the forming surface 21 and the contouring structure 22 form a product forming cavity. A multi-stage ejection mechanism is provided on the moving mold 2 so that the product is retained in the decorative strip forming cavity 12 when the moving mold 2 is opened. The remaining structure 1d is pulled by external force to force the product out of the decorative strip forming cavity 12.

[0039] In this embodiment, injection molding is performed horizontally, and material is removed from the fixed mold 1. This ensures that the final external force pulling the remaining structure 1d is a lateral pulling force, which causes the decorative strip to detach from the decorative strip forming cavity 12. This completely avoids defects such as top damage, scratches, or dents caused by material removal contact between the outer decorative surface 1a and the circumferential decorative surface 1b. Furthermore, the mold parting surface 1c is formed by the forming surface 21 on the mold core 20, which solves the problem of parting line marks on the circumferential decorative surface 1b of the molded decorative strip, further ensuring the aesthetics and quality of the decorative strip.

[0040] The horizontal design allows the remaining structure 1d to be directly exposed after detaching from the die core 20, while external force (such as a robotic arm) can directly grasp the remaining structure 1d and move it away from the fixed mold 1, thus achieving complete demolding.

[0041] The design of the cantilever punch core 11 allows the cantilever punch core 11 to be suspended in the air, which is conducive to the decorative strip formed on the cantilever punch core 11 being horizontal and to the quick removal of material without interference from external forces.

[0042] Furthermore, the cantilevered punch core 11 has an arc-shaped matching concave surface 13, and the die core 20 has an arc-shaped matching convex surface 23 that can mate with the arc-shaped matching concave surface 13. At least one decorative strip forming cavity 12 is provided on the arc-shaped matching concave surface 13, and at least one contouring structure 22 is provided on the arc-shaped matching convex surface 23. The arc-shaped matching concave surface 13 and the arc-shaped matching convex surface 23 adapt to the arc-shaped structure of the product and can also ensure the stability of the mold closing contact.

[0043] Secondly, a first arc-shaped structure 14 is provided on the arc-shaped matching concave surface 13, located on the outer sides of the two ends of the decorative strip forming cavity 12 along its length. A second arc-shaped structure 24 is provided on the arc-shaped matching convex surface 23, which can match the first arc-shaped structure 14 one by one. One of the first arc-shaped structure 14 and the second arc-shaped structure 24 is a concave structure, and the other is a convex structure. For example, the first arc-shaped structure 14 has a U-shaped or C-shaped convex structure, while the second arc-shaped structure 24 has a contoured groove structure. The cooperation of these structures can strengthen the structure at both ends of the decorative strip forming cavity 12 and can also form a secondary positional alignment correction function, so that the product forming cavity meets the high precision requirements.

[0044] The upper side of the cantilever punch core 11 is provided with a raised rib 15 that forms a recessed groove with the arc-shaped matching concave surface 13, and the upper side of the arc-shaped matching convex surface 23 is provided with an outer boss 25 that matches the recessed groove. The second arc-shaped structure 24 is provided on the outer boss 25. The matching of the recessed groove and the outer boss 25 can ensure the accuracy of mold closing and alignment, and can also strengthen the structure of the mold itself to extend the service life of the mold, while also ensuring the injection quality of the product.

[0045] Specifically, such as Figures 2-6 and Figure 9 As shown, the multi-stage ejector mechanism in this embodiment includes a primary ejector core group 3, a secondary ejector core group 4, a drive component 5, a first control component 6, and a second control component 7. When the fixed mold 1 and the moving mold 2 are closed, a product forming cavity is formed between them, such as the forming cavity of a car front bumper trim strip.

[0046] Under the action of power, the fixed mold 1 moves relative to the moving mold 2 in the first axis X direction, at which time the mold closing or opening of the fixed mold 1 and the moving mold 2 can be completed.

[0047] Of course, in order to ensure the accuracy of mold closing or opening, the two can be detachably connected by a guide rod assembly. For example, a guide rod and a guide sleeve can be used, with one of the guide rod and the guide sleeve located in the fixed mold 1 and the other in the moving mold 2. During the mold closing process, the guide rod is aligned with the guide sleeve and the two are slidably connected. During the mold opening process, the two can be completely separated to avoid interference with material handling.

[0048] Specifically, in this embodiment, the primary ejector core group 3 can move linearly relative to the moving mold 2 in the first axis X direction, while the secondary ejector core group 4 is located on the side of the primary ejector core group 3 away from the fixed mold 1 and also moves linearly along the first axis X direction; in the first state, the primary ejector core group 3 and the secondary ejector core group 4 can move synchronously in the same direction. At this time, the car front bumper trim strip is simultaneously held by the primary ejector core group 3 and the secondary ejector core group 4 and performs the demolding operation from the moving mold 2; based on the first state, this embodiment also has a second state: the primary ejector core group 3 can also move independently relative to the secondary ejector core group 4. At this time, the primary ejector core group 3 independently pushes the car front bumper trim strip away from the moving mold 2.

[0049] To achieve the above objectives, the first control component 6 in this embodiment has a first-stage control position k1 and a second-stage control position k2. The first-stage control position k1 corresponds to the first state described above, and the second-stage control position k2 corresponds to the second state described above. When the mold closing is canceled, the first-stage ejector core group 3 and the second-stage ejector core group 4 move synchronously at the first-stage control position k1. When the mold closing is canceled, the first-stage ejector core group 3 moves independently relative to the second-stage ejector core group 4 at the second-stage control position k2. After one mold opening is completed, the first-stage ejector core group 3 is driven to move closer to the second-stage ejector core group 4 again by the drive component 5. The drive component 5 is, for example, any one of a cylinder, a hydraulic cylinder, and a linear motor.

[0050] Secondly, the second control component 7 in this embodiment has an alternately switching hook position k3 and unhooking position. When it is in the hook position k3, the fixed mold 1 drives at least the first-stage ejector core group 3 to move through the second control component 7; when it is in the unhooking position, the fixed mold 1 and the moving mold 2 are completely separated.

[0051] This embodiment enables the front bumper trim strip of the car to move multiple times with the fixed mold 1 during mold opening, so that the front bumper trim strip of the car can be completely demolded from the moving mold 2. The fixed mold 1 does not interfere with the end of removing the front bumper trim strip of the car, and the end only needs to approach and grab the front bumper trim strip of the car to achieve the purpose of efficient material removal.

[0052] In the mold-closed state, the primary ejector core assembly 3 and the secondary ejector core assembly 4 also serve as a local part of the product molding cavity. When the mold closure is cancelled (i.e., the mold is opened), the primary ejector core assembly 3 and the secondary ejector core assembly 4 also perform the functions of abutting against the front bumper trim strip of the car and moving it along with the fixed mold 1, and disengaging from the moving mold 2. The primary ejector core assembly 3 includes a primary follower ejector plate 30, on which are provided a plurality of primary ejector rods 31 that are movably connected to the moving mold 2 in the first axis X direction and extend into the product molding cavity. At the end of the primary ejector rod 31 near the product molding cavity, a first contouring core block 32 that conforms to the local structure of the product is connected. The secondary ejector core assembly 4 includes a secondary follower ejector plate 40. Several secondary ejector rods 41 are mounted on the secondary follower ejector plate 40, which are movably connected to the moving mold 2 and the primary follower ejector plate 30 in the first axis X direction and extend into the product molding cavity. A second conforming core block 42, representing a local structure of the product, is connected to one end of each secondary ejector rod 41 near the product molding cavity. The secondary ejector rods 41 are inclined secondary ejector rods, and are fixedly connected to the secondary follower ejector plate 40 via supports 43.

[0053] Furthermore, in this embodiment, there are two sets of the first control components 6, symmetrically distributed on opposite sides of the moving mold 2; there are also two sets of the second control components 7, each corresponding to one of the first control components 6. This design of two sets ensures the balance of motion, thereby guaranteeing high demolding efficiency.

[0054] Specifically, the first control component 6 includes a first fixed base 60 fixed to the primary ejector core assembly 3. The first fixed base 60 has a first locking tongue groove 61 distributed along a second axis Y perpendicular to the first axis X. The moving mold 2 has a first locking rod 62 distributed along the first axis X and having a first stop surface 620. The secondary ejector core assembly 4 has a first locking tongue 63 that extends and retracts in a third axis Z direction perpendicular to the first axis X. A spring member is provided between the first locking tongue 63 and the secondary ejector core assembly 4. At least a portion of the first locking tongue 63 is inserted into the first locking tongue groove 61, and a first-stage control position k1 is formed between the first stop surface 620 and the first locking tongue 63. The stroke of the first locking tongue 63 after disengaging from the first fixed base 60 is defined as the second-stage control position k2. When the first locking tongue 63 contacts the first stop surface 620, it indicates that the primary ejector core assembly 3 has moved to its limit position.

[0055] Furthermore, the first fixed base 60 has a through groove along the first axis X for the first locking rod 62 to pass through. One end of the first locking rod 62 is fixed to the moving mold 2, and the other end passes through the through groove and is free. A first stop surface 620 is provided at the free end of the first locking rod 62. Secondly, the first stop surface 620 is inclined, and a second stop surface 630 with the same inclination direction as the first stop surface 620 is provided on the first locking tongue 63. The first stop surface 620 and the second stop surface 630 can fit together or contact each other.

[0056] Specifically, the second control component 7 in this embodiment includes a traction rod 70 connected at one end to the primary ejector core assembly 3, a hook 71 at the other end of the traction rod 70, a traction seat 72 slidably connected to the traction rod 70 on the moving mold 2, and a hook block 75 on the fixed mold 1. A cancellation mechanism is provided between the traction seat 72 and the traction rod 70 to cancel the connection when the hook 71 hooks onto the hook block 75. At least a portion of the cancellation mechanism is located on the traction seat 72, and the remaining portion is located on the traction rod 70. That is, when in the hooked position k3, the primary ejector core assembly 3 and the secondary ejector core assembly 4 move synchronously first, and then the primary ejector core assembly 3 moves independently. When in the unhooked position, the primary ejector core assembly 3 also stops moving, and then the material removal operation is performed.

[0057] The cancellation mechanism includes an unlocking component 73 and an unlocking ramp 74. Either the unlocking component 73 or the unlocking ramp 74 is located on the traction seat 72, and the other is located on the traction rod 70. To ensure the stability of the movement, there are two sets of cancellation mechanisms, with each set containing two unlocking components 73 and two unlocking ramps 74. The unlocking component 73 moves non-linearly within the unlocking ramp 74, such as including a straight groove, an inclined groove connecting the straight groove, and another straight groove connecting the inclined groove. When it passes through the inclined groove, it achieves complete unlocking.

[0058] The working principle of this embodiment is as follows: S1. The fixed mold 1 in the closed state is moved relative to the moving mold 2 by power drive, and the second control component 7 is in the hook position k3 and the first control component 6 is in the first stage control position k1, so that the fixed mold 1 drives the first-stage ejector core group 3 and the second-stage ejector core group 4 to move synchronously. At this time, the car front bumper trim strip is disengaged from the moving mold 2 and remains on the fixed mold 1. S2. Based on the power of S1, when the first control component 6 is in the second stage control position k2, the fixed mold 1 drives the first-level ejector core group 3 to move independently relative to the second-level ejector core group 4, so that the car front bumper trim strip moves further away from the moving mold 2. S3. Based on S2, when the second control component 7 is in the disengagement position, the fixed mold 1 and the moving mold 2 are completely separated. At this time, the car front bumper trim strip remains on the fixed mold 1. Removing the car front bumper trim strip completes the mold opening and material removal.

[0059] The specific embodiments described herein are merely illustrative of the spirit of the invention. Those skilled in the art to which this invention pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of the invention or exceeding the scope defined by the appended claims.

Claims

1. A horizontal injection mold for a decorative strip on a front bumper of an automobile, the decorative strip having an outer decorative surface (1a) and a circumferential decorative surface (1b) connecting the outer decorative surface (1a), the circumferential decorative surface (1b) ending at a parting surface (1c), the horizontal injection mold comprising a fixed mold (1) and a moving mold (2) arranged horizontally, the fixed mold (1) having an injection port (10), characterized in that, The fixed mold (1) is provided with a cantilever punch core (11) protruding towards the moving mold (2). The cantilever punch core (11) is provided with a decorative strip forming cavity (12), and the cavity wall of the decorative strip forming cavity (12) is modeled after the outer decorative surface (1a) and the circumferential decorative surface (1b). The moving mold (2) is provided with a die core (20) that is located above the cantilever punch core (11) when the mold is closed. The die core (20) has a forming surface (21) that is modeled after the mold parting surface (1c). The concave mold core (20) is provided with a contouring structure (22) that conforms to the remaining structure (1d) on the back of the car front bumper decorative strip. The decorative strip forming cavity (12), the forming surface (21) and the contouring structure (22) form a product forming cavity. The moving mold (2) is provided with a multi-stage ejection mechanism that keeps the product in the decorative strip forming cavity (12) when the moving mold (2) is opened. The product is forced to leave the decorative strip forming cavity (12) by pulling the remaining structure (1d). The multi-stage ejector mechanism includes a first-stage ejector core group (3) that moves linearly relative to the moving mold (2) in the first axis (X) direction and a second-stage ejector core group (4) located on the side of the first-stage ejector core group (3) away from the fixed mold (1), and also includes a drive component (5) and a first control component (6) having a first stage control position (k1) and a second stage control position (k2). At the first stage control position (k1) when the mold closing is cancelled, the primary ejector core group (3) and the secondary ejector core group (4) move synchronously; at the second stage control position (k2) when the mold closing is cancelled, the primary ejector core group (3) can move independently relative to the secondary ejector core group (4); the drive component (5) drives the primary ejector core group (3) to move closer to the secondary ejector core group (4). It also includes a second control component (7) with alternating hook position (k3) and unhooking position. When in the hook position (k3), the fixed mold (1) drives at least the first-stage ejector core group (3) to move through the second control component (7); when in the unhooking position, the fixed mold (1) is completely separated from the moving mold (2).

2. The horizontal injection mold for automotive front bumper trim strips according to claim 1, characterized in that, The cantilever punch core (11) has an arc-shaped matching concave surface (13), and the concave core (20) has an arc-shaped matching convex surface (23) that can match the arc-shaped matching concave surface (13). At least one of the decorative strip forming cavities (12) is provided on the arc-shaped matching concave surface (13), and at least one of the contouring structures (22) is provided on the arc-shaped matching convex surface (23).

3. The horizontal injection mold for automotive front bumper trim strips according to claim 2, characterized in that, On the arc-shaped matching concave surface (13), there is also a first arc-shaped structure (14) located on the outer side of the two ends of the decorative strip forming cavity (12) in the length direction. On the arc-shaped matching convex surface (23), there is a second arc-shaped structure (24) that can match the first arc-shaped structure (14) one by one. One of the first arc-shaped structure (14) and the second arc-shaped structure (24) is a concave structure and the other is a convex structure.

4. The horizontal injection mold for automotive front bumper trim strips according to claim 3, characterized in that, The upper side of the cantilever punch core (11) is provided with a raised rib (15) that forms a recessed groove with the arc-shaped matching concave surface (13), and the upper side of the arc-shaped matching convex surface (23) is provided with an outer boss (25) that matches the recessed groove, and the second arc-shaped structure (24) is provided on the outer boss (25).

5. The horizontal injection mold for automotive front bumper trim strips according to claim 1, characterized in that, The first control component (6) includes a first fixed seat (60) fixed to the first-stage ejector core assembly (3), a first locking tongue groove (61) distributed along a second axis (Y) perpendicular to the first axis (X) on the first fixed seat (60), a first locking rod (62) distributed along the first axis (X) and having a first stop surface (620) on the moving mold (2), and a first locking tongue (63) that moves telescopically in a third axis (Z) direction perpendicular to the first axis (X) on the second-stage ejector core assembly (4), at least a portion of the first locking tongue (63) is inserted into the first locking tongue groove (61) and a first stage control position (k1) is formed between the first stop surface (620) and the first locking tongue (63), and the stroke of the first locking tongue (63) after it disengages from the first fixed seat (60) is defined as the second stage control position (k2).

6. The horizontal injection mold for automotive front bumper trim strips according to claim 5, characterized in that, The first stop surface (620) is inclined, and a second stop surface (630) with the same inclination direction as the first stop surface (620) is provided on the first latch (63).

7. The horizontal injection mold for automotive front bumper trim strips according to claim 1, characterized in that, The second control component (7) includes a traction rod (70) with one end connected to the first-stage ejector core assembly (3), a hook (71) at the other end of the traction rod (70), a traction seat (72) slidably connected to the traction rod (70) on the moving mold (2), a hook block (75) on the fixed mold (1), and a cancellation mechanism between the traction seat (72) and the traction rod (70) that can cancel the connection between the two when the hook (71) hooks onto the hook block (75). At least a part of the cancellation mechanism is located on the traction seat (72), and the remaining part of the cancellation mechanism is located on the traction rod (70).

8. The horizontal injection mold for automotive front bumper trim strips according to claim 7, characterized in that, The cancellation mechanism includes an unlocking component (73) and an unlocking groove (74), one of which is located on the traction seat (72), and the other is located on the traction rod (70).

9. The horizontal injection mold for automotive front bumper trim strips according to claim 1, characterized in that, The primary ejector core assembly (3) includes a primary follower ejector plate (30), on which are provided a plurality of primary ejector rods (31) that are movably connected to the moving mold (2) in the first axis (X) direction and extend into the product molding cavity. A first conforming core block (32) of the conforming product's local structure is connected to one end of the primary ejector rod (31) near the product molding cavity. The secondary ejector core assembly (4) includes a secondary follower ejector plate (40). The secondary follower ejector plate (40) is provided with a plurality of secondary ejector rods (41) that are movably connected to the moving mold (2) and the primary follower ejector plate (30) in the first axis (X) direction and extend into the product molding cavity. A second conforming core block (42) of the conforming product's local structure is connected to one end of the secondary ejector rod (41) near the product molding cavity.

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