A parting mechanism in the mold of a front grille trim

Abstract

The present invention provides an internal parting mechanism for a front grille trim mold, comprising a large inclined top, a tensile deformation mechanism, and a front mold slider mechanism. The tensile deformation mechanism comprises a longitudinally arranged tensile deformation guide rail, a transversely arranged pull rod, and a pull block. One end of the pull rod is fixedly connected to the pull block, and the other end of the pull rod can move up and down along the tensile deformation guide rail. A guide groove is provided on one side of the tensile deformation guide rail, and the middle portion of the guide groove is concave toward the inner side of the front grille trim. A receiving groove is provided on the side of the large inclined top proximal to the front grille trim, and the pull block is positioned within the receiving groove. A clearance groove for accommodating the front grille trim is also provided between the pull block and the large inclined top. The tensile deformation mechanism is provided to pull the undercut portion of the front grille trim during mold opening, thereby achieving smooth demolding. This allows the parting line to be hidden on a surface not in the primary viewing area, forming an internal parting line, thereby preventing the parting line of the product from being exposed.

Description

Technical Field

[0001] The present invention relates to the field of automobile manufacturing, and in particular to a parting mechanism in a front grille trim mould. Background Art

[0002] The rationality of the location and shape of the injection mold's parting surface not only impacts the mold's complexity, but also its quality, performance, and ease of operation. Therefore, parting surface design is a crucial step in mold design. With the development of the automotive industry, consumers are increasingly demanding the exterior quality of their vehicles, especially sedans. Key exterior trim components like chrome trim have become increasingly prominent in the decorative role they play.

[0003] For grille trim parts with large height differences, such as Figure 1 As shown, in traditional mold design, in order to avoid the formation of undercuts, the parting surface is set at C outside the transition radius between surface A and surface B (where the outer circle curvature is the largest), resulting in the parting line being on the visible surface.

[0004] The main defects of this external parting design are:

[0005] 1) The parting line at one end of the product is located on the R angle of the appearance. After the part is loaded on the vehicle, the parting line is visible;

[0006] 2) After the grille trim is electroplated, the visibility of the parting line on the part surface is magnified, resulting in poor perceived quality of the part;

[0007] 3) Due to the mold manufacturing precision and wear during the injection production process, misalignment and flash often occur at the parting line, which seriously affects the appearance quality of the plastic part and reduces the qualified rate of plastic part injection molding production.

[0008] In order to solve the above problem, the parting surface can only be set on the inner side of the excessively rounded corners. However, this inner parting design forms an undercut shape in the mold opening direction, making it impossible to open the mold. Summary of the Invention

[0009] In order to solve the problems in the prior art, the present invention provides a parting mechanism in a front grille trim mold.

[0010] The present invention provides a parting mechanism in a front grille trim mold, comprising a large inclined top for supporting the inner side of the front grille trim with an inverted end, a pulling deformation mechanism for pulling the inverted end of the front grille trim inward, and a front mold slider mechanism for allowing the inverted end of the front grille trim to escape from the corresponding mold core. The pulling deformation mechanism comprises a longitudinally arranged pulling deformation guide rail, a transversely arranged pull rod and a pull block, one end of the pull rod is fixedly connected to the pull block, and the other end of the pull rod can move up and down along the pulling deformation guide rail, a guide groove is provided on one side of the pulling deformation guide rail, and the middle part of the guide groove is concave toward the inner side of the front grille trim, a accommodating groove is provided on the side of the large inclined top close to the front grille trim, the pull block is placed in the accommodating groove, and a gap groove for accommodating the front grille trim is also provided between the pull block and the large inclined top.

[0011] As a further improvement of the present invention, the front mold slider mechanism includes a slider body, a slider base and an inclined guide column, the slider base is fixed on the mold cavity, the inclined guide column is fixed on the mold core, and the slider body is sleeved on the inclined guide column and is slidably connected to the slider base.

[0012] As a further improvement of the present invention, the parting mechanism in the front grille trim mold further includes an ejector plate, and the lower end of the large inclined ejector is connected to the ejector plate via a large inclined ejector connecting rod.

[0013] As a further improvement of the present invention, the parting mechanism in the front grille trim mold further includes a large straight top, the lower end of which is connected to the ejector plate via a large straight top connecting rod.

[0014] As a further improvement of the present invention, the parting mechanism in the front grille trim mold further includes a small straight top, the lower end of which is connected to the ejector plate via a small straight top connecting rod.

[0015] As a further improvement of the present invention, the parting mechanism in the front grille trim mold further includes a small inclined top, and the lower end of the small inclined top is connected to the ejector plate through a small inclined top connecting rod.

[0016] The beneficial effects of the present invention are as follows: the present invention can pull the undercut portion of the front grille trim strip when the mold is opened by arranging a pulling and deforming mechanism, thereby achieving smooth demolding, so that the parting line can be hidden on the non-main viewing area surface to form an internal parting line, so that the parting line of the product is not exposed, thereby improving the perceived quality of the product appearance; avoiding the risk of potential parting line polishing of the product, reducing the development cost of the product; and improving the pass rate of the product post-processing painting or electroplating. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a structural schematic diagram of a parting mechanism in a front grille trim mold of the present invention;

[0018] Figure 2 It is a structural schematic diagram of a pulling and deforming mechanism of a parting mechanism in a front grille trim mold of the present invention;

[0019] Figure 3 yes Figure 2 A partial enlarged view of

[0020] Figure 4 It is a structural schematic diagram of a front mold slider mechanism of a parting mechanism in a front grille trim mold of the present invention;

[0021] Figure 5 This is a structural diagram of the working principle of a parting mechanism in a front grille trim mold of the present invention.

[0022] Figure numerals: 1-large inclined top; 21-pull deformation guide rail; 22-pull rod; 23-pull block; 31-slider body; 32-slider base; 33-inclined guide column; 4-thrust pin plate; 5-large inclined top connecting rod; 6-large straight top; 7-small straight top; 8-small inclined top; 9-front grille trim; 10-inverted mounting structure. DETAILED DESCRIPTION

[0023] like Figures 1 to 5As shown, the present invention discloses a parting mechanism in a front grille trim mold, comprising a large inclined top 1 for supporting the inner side of the front grille trim 9 provided with an inverted end, a pulling deformation mechanism for pulling the inverted end of the front grille trim 9 inward, and a front mold slider mechanism for the front grille trim 9 provided with an inverted end to disengage the inverted end from the corresponding core. The pulling deformation mechanism comprises a longitudinally arranged pulling deformation guide rail 21, a transversely arranged pull rod 22 and a pull block 23, one end of the pull rod 22 is fixedly connected to the pull block 23, and the other end of the pull rod 22 can move up and down along the pulling deformation guide rail 21, a guide groove is provided on one side of the pulling deformation guide rail 21, and the middle part of the guide groove is concave toward the inner side of the front grille trim 9, the large inclined top 1 is provided with a accommodating groove on the side close to the front grille trim 9, the pull block 23 is placed in the accommodating groove, and a gap groove for accommodating the front grille trim 9 is also provided between the pull block 23 and the large inclined top 1. When the mold injection filling is completed and the mold opening action is performed, the pulling and deformation mechanism moves synchronously first, and the synchronous movement is divided into two steps. In the first step, the large inclined top 1 moves backward to make room for the product to be pulled and deformed; in the second step, the large inclined top 1 continues to retreat, and the pulling block 23 pulls the product inward through the pulling and deformation guide rail 21, and pulls out the undercut of the product in the main demolding direction due to the internal parting, completing the pulling and deformation action. At this time, the product can be demolded normally, and then the mold continues to perform subsequent injection molding actions. When performing the first step of the pulling and deformation synchronization stage, since the front grille trim 9 has other undercut mounting structures 10 near the pulling and deformation area, the structure of this area will prevent the product from being pulled and deformed in the next step. Therefore, before performing the second step of the pulling and deformation action, the front grille trim 9 product part near the pulling and deformation area is first removed from the core through the front mold slider mechanism, so that there is no undercut in the pulling and deformation direction, ensuring the smooth progress of the second step of the pulling and deformation action.

[0024] In this technical solution, the front mold slider mechanism includes a slider body 31, a slider base 32, and an inclined guide post 33. The slider base 32 is fixed to the mold cavity, and the inclined guide post 33 is fixed to the mold core. The slider body 31 is sleeved on the inclined guide post 33 and is slidably connected to the slider base 32, wherein the slider base 32 is fixed to the mold cavity, the inclined guide post 33 is fixed to the mold core, and the slider body 31 is connected to the slider base 32 and slides on the slider base 32. During the first step of the synchronous stretching and deformation stage, the core and cavity are opened 30 mm. At this time, the slider body 31 moves along the slider base 32 through the mold opening drive of the inclined guide post 33, disengaging the product structure in the stretching and deformation area of the product so that there is no undercut in the stretching and deformation direction, ensuring the smooth progress of the second step of the stretching and deformation action.

[0025] In this technical solution, the parting mechanism in the front grille trim mold also includes a pin plate 4. The lower end of the large inclined ejector 1 is connected to the pin plate 4 through a large inclined ejector connecting rod 5. The pin plate 4 controls the lifting and lowering of the large inclined ejector connecting rod 5, thereby controlling the forward and backward movement of the large inclined ejector 1.

[0026] In this technical solution, the parting mechanism in the front grille trim mold also includes a large straight top 6, a small straight top 7 and a small inclined top 8. The lower end of the large straight top 6 is connected to the ejector plate 4 through a large straight top connecting rod, the lower end of the small straight top 7 is connected to the ejector plate 4 through a small straight top connecting rod, and the lower end of the small inclined top 8 is connected to the ejector plate 4 through a small inclined top connecting rod. The large straight top 6, the small straight top 7 and the small inclined top 8 are all used to support the front grille trim 9 product to complete its demolding.

[0027] The present invention provides a pulling deformation mechanism that can pull the undercut portion of the front grille trim 9 when the mold is opened, thereby achieving smooth demolding. In this way, the parting line can be hidden on the non-main viewing area surface to form an internal parting line, so that the parting line of the product is not exposed, thereby improving the perceived quality of the product appearance; avoiding the risk of potential polishing of the parting line of the product, reducing the development cost of the product; and improving the pass rate of the product post-processing painting or electroplating.

[0028] The above is a further detailed description of the present invention in conjunction with specific preferred embodiments, and the specific implementation of the present invention should not be considered to be limited to these descriptions. For those skilled in the art of the present invention, without departing from the concept of the present invention, several simple deductions or substitutions can be made, which should be considered to fall within the scope of protection of the present invention.

Claims

1. A parting mechanism in a front grille trim mold, characterized by: The front grille trim strip is provided with an inverted end, and the front grille trim strip is provided with an inverted end, and the front grille trim strip is provided with an inverted end. The inverted end of the front grille trim strip is pulled out of the corresponding mold core by a front mold slider mechanism; the deformation mechanism includes a longitudinal deformation guide rail, a transverse pull rod and a pull block, one end of the pull rod is fixedly connected to the pull block, and the other end of the pull rod can move up and down along the deformation guide rail, and a guide groove is provided on one side of the deformation guide rail, and the middle part of the guide groove is concave toward the inner side of the front grille trim strip; the large slanted top is close to the front grille trim strip. A receiving groove is provided on one side of the mold, and the pulling block is placed in the receiving groove, and a gap groove for accommodating the front grille decorative strip is further provided between the pulling block and the large inclined top; when the mold injection filling is completed and the mold opening action is performed, the pulling deformation mechanism first moves synchronously, and the synchronous movement is divided into two steps. In the first step, the large inclined top moves backward to make room for the product to be pulled and deformed; in the second step, the large inclined top continues to retreat, and the pulling block pulls the product inward through the pulling deformation guide rail, pulling out the undercut of the product in the main ejection direction due to the internal parting, completing the pulling deformation action. At this time, the product can be ejected normally, and then the mold continues to perform subsequent injection molding actions; The front mold slider mechanism includes a slider body, a slider base and an inclined guide column, the slider base is fixed on the mold cavity, the inclined guide column is fixed on the mold core, the slider body is sleeved on the inclined guide column and is slidably connected to the slider base; when performing the first step of the pulling deformation synchronization stage, the slider body moves along the slider base through the mold opening driving action of the inclined guide column, and the product structure in the pulling deformation area of the product is disengaged, so that there is no undercut in the pulling deformation direction, thereby ensuring the smooth progress of the second step of pulling deformation action.

2. The front grille trim mold internal parting mechanism according to claim 1, characterized in that: The parting mechanism in the front grille trim mold also includes an ejector plate, and the lower end of the large inclined ejector is connected to the ejector plate through a large inclined ejector connecting rod.

3. The front grille trim mold internal parting mechanism according to claim 2, characterized in that: The parting mechanism in the front grille trim mold also includes a large straight top, the lower end of which is connected to the ejector plate via a large straight top connecting rod.

4. The front grille trim mold internal parting mechanism according to claim 2, characterized in that: The parting mechanism in the front grille trim mold also includes a small straight top, the lower end of which is connected to the ejector plate via a small straight top connecting rod.

5. The front grille trim mold internal parting mechanism according to claim 2, characterized in that: The parting mechanism in the front grille trim mold also includes a small inclined top, the lower end of which is connected to the ejector plate via a small inclined top connecting rod.

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