An automobile side wall injection molding part upside-down mold

Abstract

The utility model discloses an automobile side wall injection molding part upside -down mould, including core side mould support, the upper end fixedly connected with cavity side mould support of core side mould support, the front side of cavity side mould support and the back of core side mould support are fixedly connected with the support guide rod, is provided with the mounting plate frame on the support guide rod and penetrates, the core side mould support includes core side mould, the back of core side mould support is provided with the core side mould, the fixedly connected limit rod of core side mould's parting surface, the front side of core side mould is seted up with the groove, is provided with the ejection plate in the groove, and nitrogen gas spring is set up in the core side mould, and nitrogen gas spring accumulates force when closing mould, and multiple nitrogen gas springs synchronous drive when opening mould, provide smooth, huge initial demolding force, make the product from the core side mould large -area peeling, greatly reduced local stress, avoided traditional direct through the hydraulic or pneumatic ejection, caused the product top white even the problem of breakage.

Description

Technical Field

[0001] This utility model relates to the field of injection molding technology, specifically to a reverse mold for automotive side panel injection molding parts. Background Technology

[0002] Automotive side panels are large external body panels of automobiles, characterized by their large size, complex structure (often integrating features such as waistlines, door openings, and wheel arches), and high requirements for appearance quality (no weld lines, shrinkage marks, etc.). Inverted molds are special mold structures where the mold core is mounted on one end of the injection molding machine barrel, and the cavity is mounted on the other end. They are primarily used to address the process requirement of having the injection and ejection points on the same side. Their core features include: injection and ejection on the same side: the hot runner injects the material from the core side, and the ejection and injection devices are located on the same side, requiring a hydraulic cylinder or push plate for ejection. Application scenarios include injection molding: suitable for complex products with high appearance requirements and where surface defects are unacceptable due to the large coverage area of ​​the side panel. The inverted structure allows for back-side injection to avoid surface defects. Traditional hydraulic or pneumatic ejection systems are prone to uneven ejection force when ejecting large, thin-walled parts, which can lead to product whitening, deformation, or even breakage. Under the huge injection pressure, the moving and fixed molds may experience slight misalignment (flash) or elastic deformation, affecting the dimensional accuracy and fit of the product. Utility Model Content

[0003] The purpose of this section is to outline some aspects of the embodiments of this utility model and to briefly introduce some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be used to limit the scope of this utility model.

[0004] In view of the problems existing in the above and / or existing reverse molds for automotive side panel injection molding, this utility model is proposed.

[0005] Therefore, the purpose of this utility model is to provide an inverted mold for automotive side panel injection molding parts. A nitrogen spring is installed inside the core mold. During mold closing, the nitrogen spring stores force, and during mold parting, multiple nitrogen springs drive synchronously, providing a stable and powerful initial demolding force. This allows the product to peel off from the core mold over a large area, greatly reducing local stress and avoiding the problems of product whitening or even cracking caused by traditional direct hydraulic or pneumatic ejection. A limiting rod on the parting surface of the core mold corresponds to a limiting hole on the parting surface of the cavity mold. During mold closing, the limiting rod inserts into the limiting hole, limiting and fixing the core and cavity molds, effectively resisting the lateral force generated by injection pressure and preventing flash and misalignment.

[0006] To solve the above-mentioned technical problems, according to one aspect of the present invention, the present invention provides the following technical solution: A reverse mold for automotive side panel injection molding includes a core side mold bracket, a cavity side mold bracket fixedly connected to the upper end of the core side mold bracket, a support guide rod fixedly connected between the front side of the cavity side mold bracket and the rear side of the core side mold bracket, and a mounting plate frame passing through the support guide rod.

[0007] The core side mold support includes a core side mold. The core side mold is provided on the rear side of the core side mold support. A limit rod is fixedly connected to the parting surface of the core side mold. A groove is opened on the front side of the core side mold. An ejector plate is provided in the groove. A nitrogen spring is connected between the ejector plate and the core side mold support. A demolding insert is fixedly connected to the rear side of the ejector plate. A miniature hydraulic telescopic rod is fixedly installed on the rear side of the ejector plate. A push rod is fixedly connected to the telescopic end of the miniature hydraulic telescopic rod.

[0008] As a preferred embodiment of the inverted mold for automotive side panel injection molding according to this utility model, the rear side of the mounting plate frame and the telescopic end of the hydraulic telescopic rod are fixedly connected, the hydraulic telescopic rod is fixedly installed through the side wall of the cavity side mold support, and the lower end of the cavity side mold support and the lower end of the core side mold support are both provided with opening slots.

[0009] As a preferred embodiment of the inverted mold for automotive side panel injection molding according to the present invention, the core side mold support further includes a first annular ear plate. The first annular ear plate is fixedly connected to the outer side of the core side mold near the front. A first countersunk hole is opened through the first annular ear plate. A first bolt is installed through the first countersunk hole. The front end of the first bolt is threaded into a bolt hole opened on the core side mold support.

[0010] As a preferred embodiment of the inverted mold for automotive side panel injection molding according to the present invention, the core side mold support further includes an injection channel. The core side mold support is provided with an injection channel, and a sealing groove is provided on the outer side of the injection port of the injection channel. A sealing ring is provided in the sealing groove.

[0011] As a preferred embodiment of the inverted mold for automotive side panel injection molding according to the present invention, the core side mold support further includes a through hole, the through hole is provided through the rear side of the groove, the through slot and the top hole are provided through the rear side of the groove, the top hole is disposed between the through slot, the demolding insert is disposed through the through slot, and the ejector rod is disposed through the top hole.

[0012] As a preferred embodiment of the inverted mold for automotive side panel injection molding according to the present invention, the core side mold support further includes a reset rod, and the reset rod is fixedly connected to the rear side of the ejector plate, and the reset rod is disposed through the through hole.

[0013] As a preferred embodiment of the inverted mold for automotive side panel injection molding according to the present invention, the mounting plate frame includes a cavity side mold, a cavity side mold is provided at the front side of the mounting plate frame, and a second annular ear plate is fixedly connected to the outer side of the cavity side mold near the rear, and a second countersunk hole is provided through the second annular ear plate.

[0014] As a preferred embodiment of the inverted mold for automotive side panel injection molding described in this utility model, a second bolt is provided through the second countersunk hole, and the rear end of the second bolt is threadedly connected to a bolt hole opened on the mounting plate.

[0015] As a preferred embodiment of the inverted mold for automotive side panel injection molding described in this utility model, a limiting hole is provided at the parting surface of the cavity side mold, and the limiting hole and the limiting rod are provided in a one-to-one correspondence.

[0016] Compared with the prior art, the beneficial effects of this utility model are as follows: By setting nitrogen springs in the core-side mold, the nitrogen springs store force when the mold is closed, and multiple nitrogen springs drive synchronously when the mold is opened, providing a stable and huge initial demolding force, which allows the product to peel off from the core-side mold over a large area, greatly reducing local stress and avoiding the problem of product whitening or even cracking caused by traditional direct hydraulic or pneumatic ejection. In addition, the ejector rod is pushed by a micro hydraulic telescopic rod, and the ejector rod further ejects the peeled product under the action of the ejector rod, ensuring that the product is completely demolded. The limiting rod set on the parting surface of the core-side mold and the limiting hole set on the parting surface of the cavity-side mold correspond to each other. When the mold is closed, the limiting rod is inserted into the limiting hole, which limits and fixes the core-side mold and the cavity-side mold, effectively resisting the lateral force generated by the injection pressure and preventing flash and misalignment. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this utility model, the present utility model will be described in detail below with reference to the accompanying drawings and detailed embodiments. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Among them: Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the core side mold support, core side mold, and first annular ear plate structure of this utility model; Figure 3 This is a schematic diagram of the core-side mold and groove structure of this utility model; Figure 4 This is a schematic diagram of the structure of the groove, the top plate, and the nitrogen spring of this utility model; Figure 5 This is a schematic diagram of the ejector plate, reset rod, and demolding insert of this utility model. Figure 6 This is a schematic diagram of the cavity side mold and the second annular ear plate structure of this utility model.

[0018] In the diagram: 1. Core side mold support; 101. Core side mold; 102. First annular ear plate; 103. First countersunk hole; 104. First bolt; 105. Limiting rod; 106. Groove; 107. Injection channel; 108. Sealing groove; 109. Perforation; 110. Through groove; 111. Top hole; 112. Ejector plate; 113. Nitrogen spring; 114. Reset rod; 115. Demolding insert; 116. Miniature hydraulic telescopic rod; 117. Ejector rod; 2. Cavity side mold support; 3. Support guide rod; 4. Mounting plate frame; 401. Cavity side mold; 402. Second annular ear plate; 403. Second countersunk hole; 404. Second bolt; 405. Limiting hole; 5. Hydraulic telescopic rod; 6. Opening groove. Detailed Implementation

[0019] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0020] Secondly, this utility model is described in detail with reference to the schematic diagrams. When describing the embodiments of this utility model, for ease of explanation, the cross-sectional views showing the device structure may be partially enlarged, not according to the usual scale. Furthermore, the schematic diagrams are merely examples and should not limit the scope of protection of this utility model. In addition, in actual manufacturing, the three-dimensional spatial dimensions of length, width, and depth should be included.

[0021] To make the objectives, technical solutions, and advantages of this utility model clearer, the embodiments of this utility model will be described in further detail below with reference to the accompanying drawings.

[0022] This utility model provides an inverted mold for automotive side panel injection molding parts. A nitrogen spring is installed inside the core mold. During mold closing, the nitrogen spring stores force, and during mold parting, multiple nitrogen springs drive synchronously, providing a stable and powerful initial demolding force. This allows the product to peel off from the core mold over a large area, greatly reducing local stress and avoiding the problems of product whitening or even cracking caused by traditional hydraulic or pneumatic ejection. A limiting rod on the parting surface of the core mold corresponds to a limiting hole on the parting surface of the cavity mold. During mold closing, the limiting rod inserts into the limiting hole, limiting and fixing the core and cavity molds, effectively resisting the lateral force generated by injection pressure and preventing flash and misalignment.

[0023] Figures 1-6The diagram shown is an overall structural schematic of one embodiment of the inverted mold for automotive side panel injection molding according to this utility model. Please refer to [link / reference]. Figures 1-6 This embodiment of an inverted mold for automotive side panel injection molding includes a core side mold support 1, a cavity side mold support 2 fixedly connected to the upper end of the core side mold support 1, a support guide rod 3 fixedly connected between the front side of the cavity side mold support 2 and the rear side of the core side mold support 1, and a mounting plate frame 4 passing through the support guide rod 3.

[0024] The core side mold support 1 includes a core side mold 101. The core side mold 101 is provided on the rear side of the core side mold support 1. A limit rod 105 is fixedly connected to the parting surface of the core side mold 101. A groove 106 is provided on the front side of the core side mold 101. An ejector plate 112 is provided in the groove 106. A nitrogen spring 113 is connected between the ejector plate 112 and the core side mold support 1. A demolding insert 115 is fixedly connected to the rear side of the ejector plate 112. A miniature hydraulic telescopic rod 116 is fixedly installed on the rear side of the ejector plate 112. A push rod 117 is fixedly connected to the telescopic end of the miniature hydraulic telescopic rod 116.

[0025] By incorporating nitrogen springs 113 within the core-side mold 101, the nitrogen springs 113 store energy during mold closing and are simultaneously driven during mold opening, thereby pushing the ejector plate 112. This, in turn, acts on the product via the demolding insert 115, providing a stable and substantial initial demolding force. This allows the product to peel off from the core-side mold 101 over a large area, significantly reducing localized stress and avoiding the problems of product whitening or even cracking that can occur with traditional direct hydraulic or pneumatic ejection. Furthermore, a micro hydraulic telescopic rod 116 pushes the ejector rod 117, which further ejects the peeled product, ensuring complete demolding.

[0026] The rear side of the mounting plate 4 is fixedly connected to the telescopic end of the hydraulic telescopic rod 5. The hydraulic telescopic rod 5 is fixedly installed through the side wall of the cavity side mold support 2. The lower end of the cavity side mold support 2 and the lower end of the core side mold support 1 are both provided with opening slots 6.

[0027] The hydraulic telescopic rod 5 acts on the mounting plate frame 4 to drive mold closing and opening.

[0028] The core side mold support 1 also includes a first annular ear plate 102. The first annular ear plate 102 is fixedly connected to the outer side of the core side mold 101 near the front. A first countersunk hole 103 is provided through the first annular ear plate 102. A first bolt 104 is provided through the first countersunk hole 103. The front end of the first bolt 104 is threaded into the bolt hole provided on the core side mold support 1. The core side mold 101 is threadedly connected to the bolt hole opened on the core side mold bracket 1 through the first annular ear plate 102 under the action of the first bolt 104 passing through the first countersunk hole 103, for the installation and fixation of the core side mold 101.

[0029] The core side mold support 1 also includes an injection channel 107. The injection channel 107 is provided inside the core side mold support 1. A sealing groove 108 is provided on the outside of the injection port of the injection channel 107. A sealing ring is provided inside the sealing groove 108.

[0030] The injection channel 107 corresponds to the injection nozzle on the side of the core side mold support 1 and is used for injecting plastic. The sealing ring enhances the seal between the injection port of the injection channel 107 and the core side mold support 1.

[0031] The core side mold support 1 also includes a through hole 109. A through hole 109 is provided through the rear side of the groove 106. A through slot 110 and a top hole 111 are provided through the rear side of the groove 106. The top hole 111 is located between the through slot 110. A demolding insert 115 is provided through the through slot 110. An ejector rod 117 is provided through the top hole 111. The core side mold support 1 also includes a reset rod 114. A reset rod 114 is fixedly connected to the rear side of the ejector plate 112. The reset rod 114 is provided through the through hole 109.

[0032] The reset rod 114 contacts the cavity surface inside the mold cavity side 401 during mold closing, which helps the ejector plate 112 to reset. The length of the reset rod 114 is greater than the length of the ejector pin 117 and the demolding insert 115. Furthermore, the reset rod 114 is positioned outside the molding area of ​​the product, typically in the "empty" area of ​​the mold blank. The reset rod 114 passes precisely through the through hole 109, the demolding insert 115 passes precisely through the through slot 110, and the ejector pin 117 passes precisely through the top hole 111. The reset rod 114 is used to reset the ejector plate 112. The ejector insert 115 passes through the through hole 109 and the ejector pin 115 passes through the through slot 110 for initial product demolding. The ejector pin 117 passes through the top hole 111 for further product removal. The reset rod 114, ejector insert 115 and ejector pin 117 can move freely in the through hole 109, through slot 110 and top hole 111, while avoiding the plastic melt from seeping in and causing flash. The gap between them is very small, about 0.01-0.03mm.

[0033] The mounting frame 4 includes a cavity-side mold 401. The cavity-side mold 401 is provided at the front side of the mounting frame 4. A second annular ear plate 402 is fixedly connected to the outer side of the cavity-side mold 401 near the rear. A second countersunk hole 403 is provided through the second annular ear plate 402. A second bolt 404 is provided through the second countersunk hole 403. The rear end of the second bolt 404 is threaded into the bolt hole provided on the mounting frame 4. A limiting hole 405 is provided at the parting surface of the cavity-side mold 401. The limiting hole 405 and the limiting rod 105 are provided in a one-to-one correspondence.

[0034] The cavity-side mold 401 is threaded into the bolt hole on the mounting plate frame 4 through the second annular ear plate 402 and the second countersunk hole 403 under the action of the second bolt 404. It is used for the installation and fixation of the cavity-side mold 401. When the mold is closed, the limiting rod 105 is inserted into the limiting hole 405 to limit and fix the core-side mold 101 and the cavity-side mold 401, effectively resisting the lateral force generated by the injection pressure and preventing flash and misalignment.

[0035] Combination Figures 1-6 This embodiment of an inverted injection mold for automotive side panels is used as follows: The cavity side mold 401 is threaded into the bolt hole on the mounting plate 4 through the second annular ear plate 402 and the second countersunk hole 403 under the action of the second bolt 404, for mounting and fixing the cavity side mold 401. When the mold is closed, the limiting rod 105 is inserted into the limiting hole 405 to limit and fix the core side mold 101 and the cavity side mold 401, effectively resisting the lateral force generated by the injection pressure and preventing flash and misalignment. The core side mold 101 is threaded into the bolt hole on the core side mold bracket 1 through the first annular ear plate 102 and the first countersunk hole 103 under the action of the first bolt 104, for mounting and fixing the core side mold 101. The pressure telescopic rod 5 acts on the mounting plate frame 4 for mold closing and mold opening drive. Nitrogen springs 113 are installed in the core side mold 101. When the mold is closed, the nitrogen springs 113 store force. When the mold is opened, multiple nitrogen springs 113 drive synchronously, thereby pushing the ejector plate 112. Through the demolding insert 115, it acts on the product, providing a stable and huge initial demolding force, so that the product is peeled off from the core side mold 101 over a large area. Then, the micro hydraulic telescopic rod 116 pushes the ejector rod 117. Under the action of the ejector rod 117, the peeled product is further ejected, ensuring that the product is completely demolded. The reset rod 114 contacts the cavity surface in the cavity side mold 401 when the mold is closed, which helps the ejector plate 112 to reset. The ejector plate 112 is where the nitrogen springs 113 store force.

[0036] Although the present invention has been described above with reference to embodiments, various modifications can be made and components can be replaced with equivalents without departing from the scope of the present invention. In particular, as long as there is no structural conflict, the features in the embodiments disclosed in this invention can be combined with each other in any way. The lack of an exhaustive description of these combinations in this specification is merely for the sake of brevity and resource conservation. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A reverse mold for automotive side panel injection molding, comprising a core side mold support (1), characterized in that: The upper end of the core side mold support (1) is fixedly connected to the cavity side mold support (2), and a support guide rod (3) is fixedly connected between the front side of the cavity side mold support (2) and the rear side of the core side mold support (1). A mounting plate frame (4) is provided through the support guide rod (3). The core side mold support (1) includes a core side mold (101). The core side mold (101) is provided on the rear side of the core side mold support (1). A limit rod (105) is fixedly connected to the parting surface of the core side mold (101). A groove (106) is provided on the front side of the core side mold (101). An ejector plate (112) is provided in the groove (106). A nitrogen spring (113) is connected between the ejector plate (112) and the core side mold support (1). A demolding insert (115) is fixedly connected to the rear side of the ejector plate (112). A miniature hydraulic telescopic rod (116) is fixedly installed on the rear side of the ejector plate (112). A push rod (117) is fixedly connected to the telescopic end of the miniature hydraulic telescopic rod (116).

2. The inverted mold for automotive side panel injection molding according to claim 1, characterized in that: The rear side of the mounting plate frame (4) and the telescopic end of the hydraulic telescopic rod (5) are fixedly connected. The hydraulic telescopic rod (5) is fixedly installed through the side wall of the cavity side mold support (2). The lower end of the cavity side mold support (2) and the lower end of the core side mold support (1) are both provided with opening slots (6).

3. The inverted mold for automotive side panel injection molding according to claim 1, characterized in that: The core side mold support (1) also includes a first annular ear plate (102). The first annular ear plate (102) is fixedly connected to the outer side of the core side mold (101) near the front. A first countersunk hole (103) is provided through the first annular ear plate (102). A first bolt (104) is provided through the first countersunk hole (103). The front end of the first bolt (104) is threaded into the bolt hole provided on the core side mold support (1).

4. The inverted mold for automotive side panel injection molding according to claim 1, characterized in that: The core side mold support (1) also includes an injection channel (107). The core side mold support (1) is provided with an injection channel (107). A sealing groove (108) is provided on the outside of the injection port of the injection channel (107). A sealing ring is provided in the sealing groove (108).

5. The inverted mold for automotive side panel injection molding according to claim 1, characterized in that: The core side mold support (1) also includes a through hole (109). The through hole (109) is provided through the rear side of the groove (106). The through groove (110) and the top hole (111) are provided through the rear side of the groove (106). The top hole (111) is located between the through groove (110). The demolding insert (115) is provided through the through groove (110). The ejector rod (117) is provided through the top hole (111).

6. The inverted mold for automotive side panel injection molding according to claim 1, characterized in that: The core side mold support (1) also includes a reset rod (114), and the reset rod (114) is fixedly connected to the rear side of the ejector plate (112). The reset rod (114) is disposed through the through hole (109).

7. The inverted mold for automotive side panel injection molding according to claim 1, characterized in that: The mounting plate frame (4) includes a cavity side mold (401). A cavity side mold (401) is provided at the front side of the mounting plate frame (4). A second annular ear plate (402) is fixedly connected to the outer side of the cavity side mold (401) near the rear. A second countersunk hole (403) is provided through the second annular ear plate (402).

8. The inverted mold for automotive side panel injection molding according to claim 7, characterized in that: A second bolt (404) is provided through the second countersunk hole (403), and the rear end of the second bolt (404) is threaded into the bolt hole opened on the mounting plate (4).

9. The inverted mold for automotive side panel injection molding according to claim 7, characterized in that: The cavity-side mold (401) has a limiting hole (405) at the parting surface, and the limiting hole (405) and the limiting rod (105) are provided in a one-to-one correspondence.

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