Secondary ejection mold for plastic part of electric vehicle

Abstract

The utility model belongs to the technical field of molds, and relates to a secondary ejection mold for an electric vehicle plastic part. The electric vehicle plastic part forming die comprises an electric vehicle plastic part forming lower die and an electric vehicle plastic part forming upper die. In the injection molding process, molten materials are injected into the cavity through the injection molding part, after injection molding is completed, the electric vehicle plastic part forming lower mold and the electric vehicle plastic part forming upper mold are separated, and at the moment, the embedded auxiliary forming lower demolding assembly moves downwards to drive the electric vehicle plastic part forming lower mold to move downwards synchronously; at the moment, a sufficient demolding space is formed, an ejector rod structure in the embedded auxiliary forming lower demolding assembly carries out preliminary ejection demolding on the two sides of a plastic part, then all-around secondary demolding is carried out on the plastic part through a secondary upper ejection demolding part, secondary ejection at different positions is adopted, it is guaranteed that the plastic part and a lower mold are not bonded, ejection is smooth, and the demolding efficiency is improved. The structure is compact and reasonable.

Description

Technical Field

[0001] The utility model belongs to the technical field of molds and relates to a secondary ejection mold for electric vehicle plastic parts. Background Art

[0002] With the continuous development of the electric vehicle industry, plastic parts such as electric vehicle covers are currently generally injection molded. Injection molds are tools for producing plastic products; they are also tools that give plastic products a complete structure and precise dimensions. Injection molding is a processing method used in the mass production of certain parts with complex shapes. Specifically, it refers to the high-pressure injection of heated and molten plastic into the mold cavity by an injection molding machine, and after cooling and solidification, a molded product is obtained. After the injection molding is completed, the existing electric vehicle plastic part molds generally use a single ejector structure to eject the plastic part. Because plastic parts have various uneven structures, this type of ejection method is prone to adhesion between the plastic part and the lower mold during ejection, resulting in uneven demolding and requiring manual demolding, which is more troublesome. Therefore, there is an urgent need to design a secondary ejection mold for electric vehicle plastic parts that can overcome the above defects.

[0003] In order to overcome the shortcomings of the existing technology, people have proposed various solutions through continuous exploration. For example, a Chinese patent discloses a plastic product processing and molding mold for electric vehicle accessories [application number: 202311531303.1], which includes a base, and the upper end of the base is connected to multiple guide rods, and the upper ends of the multiple guide rods are commonly fixedly connected to a top plate. A hydraulic telescopic rod is installed on the upper end of the top plate, and the telescopic end of the hydraulic telescopic rod passes through the top plate and is fixedly connected to the guide plate. The multiple guide rods all pass through the top plate and are slidably connected to the top plate. Two columnar cavities are symmetrically arranged in the base, and a through groove is penetrated through the front and back sides of the base. A rectangular cavity is arranged in the base; a molding mechanism, the molding mechanism includes a cooling trough opened at the upper end of the base, and the lower mold body is installed at the inner bottom of the cooling trough. Utility Model Content

[0004] The purpose of the utility model is to provide a secondary ejection mold for electric vehicle plastic parts in order to solve the above problems.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A secondary ejection mold for electric vehicle plastic parts, comprising an electric vehicle plastic part molding lower mold and an electric vehicle plastic part molding upper mold, wherein the electric vehicle plastic part molding lower mold is provided with a lower molding surface, and the electric vehicle plastic part molding upper mold is provided with an upper molding surface, the lower molding surface corresponds in position to the upper molding surface and has a shape that matches that of the upper molding surface, an injection molded part is provided above the electric vehicle plastic part molding upper mold, an embedded auxiliary molding lower demolding component is provided in the lower molding surface, the embedded auxiliary molding lower demolding component is adapted to the shape of the upper molding surface, and a secondary upper ejection mold part is provided below the electric vehicle plastic part molding lower mold, which passes through the electric vehicle plastic part molding lower mold and extends into the lower molding surface, and the secondary upper ejection mold part and the embedded auxiliary molding lower demolding component are staggered.

[0007] In the above-mentioned secondary ejection mold for electric vehicle plastic parts, the embedded auxiliary molding lower demolding assembly includes two embedded auxiliary molding blocks arranged in the lower molding surface. The two embedded auxiliary molding blocks are symmetrically arranged along the center line of the electric vehicle plastic part molding lower mold, and a molding block connector is provided at the bottom of the embedded auxiliary molding block.

[0008] In the above-mentioned secondary ejection mold for electric vehicle plastic parts, the molding block connecting part includes a fixed connecting square rod arranged at the bottom of the embedded auxiliary molding block, the fixed connecting square rod and the embedded auxiliary molding block are integrally formed, and a lifting bottom plate is provided under the electric vehicle plastic part molding lower mold, and the fixed connecting square rod and the lifting bottom plate are fixed by bolts.

[0009] In the above-mentioned secondary ejection mold for electric vehicle plastic parts, a fixed base plate and a push rod fixing plate are provided between the lifting bottom plate and the lower mold for forming electric vehicle plastic parts. The secondary ejection demolding part is connected to the push rod fixing plate, and the fixed connecting square rod passes through the fixed base plate and the push rod fixing plate.

[0010] In the above-mentioned secondary ejection mold for electric vehicle plastic parts, two oil cylinders are provided on the fixed base plate, and the power shafts of the oil cylinders are connected with clamping joints, which are clamped and matched with the lifting base plate.

[0011] In the above-mentioned secondary ejection mold for electric vehicle plastic parts, the embedded auxiliary molding block is provided with a side straight ejector rod passing through the embedded auxiliary molding block, and the side straight ejector rod is connected to the ejector rod fixing plate.

[0012] In the above-mentioned secondary ejection mold for electric vehicle plastic parts, the secondary upper ejection demolding parts include a number of middle straight ejector rods arranged below the electric vehicle plastic part molding lower mold, passing through the electric vehicle plastic part molding lower mold and extending into the lower molding surface, and the middle straight ejector rods and the side straight ejector rods are parallel to each other.

[0013] In the above-mentioned secondary ejection mold for electric vehicle plastic parts, an ejector block connecting rod is provided below the lower mold for forming electric vehicle plastic parts and passes through the lower mold for forming electric vehicle plastic parts. A large-area ejector block is provided on the top of the ejector block connecting rod, and the large-area ejector block is adapted to the shape of the lower molding surface.

[0014] In the above-mentioned secondary ejection mold for electric vehicle plastic parts, a supporting vertical plate is provided between the lower mold for forming the electric vehicle plastic parts and the lifting bottom plate.

[0015] In the above-mentioned secondary ejection mold for electric vehicle plastic parts, the injection molded part includes an injection molding main board and an injection molding tube arranged above the upper mold for forming the electric vehicle plastic part.

[0016] Compared with the existing technology, the advantages of this utility model are:

[0017] 1. During the injection molding process, the utility model brings the electric vehicle plastic part molding lower mold and the electric vehicle plastic part molding upper mold close to each other, so that the lower molding surface fits with the upper molding surface to form a complete cavity. The embedded auxiliary molding lower demolding component is used to assist in molding the two side structures of the plastic part. The molten material is injected into the cavity through the injection molding part. After the injection molding is completed, the electric vehicle plastic part molding lower mold and the electric vehicle plastic part molding upper mold are first separated. At this time, the embedded auxiliary molding lower demolding component is moved downward to drive the electric vehicle plastic part molding lower mold to move downward synchronously. At this time, sufficient demolding space is formed. The ejector structure in the embedded auxiliary molding lower demolding component first performs preliminary ejection and demolding on both sides of the plastic part, and then performs a secondary ejection on the plastic part in all directions through the secondary ejection component. The secondary ejection at different positions is adopted to ensure that the plastic part and the lower mold do not adhere to each other, the ejection is smooth, and the structure is compact and reasonable.

[0018] 2. In the present invention, after the embedded auxiliary molding block moves downward, the side straight ejector rods are used to initially eject and demould the two sides of the plastic part.

[0019] Other advantages, objectives and features of the present invention will be reflected in part through the following description, and in part will be understood by those skilled in the art through research and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural diagram of the present utility model.

[0021] Figure 2 It is a partial structural diagram of the utility model.

[0022] Figure 3 It is a partial structural diagram of the utility model in another direction.

[0023] Figure 4 It is a structural diagram of the upper mold for molding plastic parts of electric vehicles.

[0024] In the figure: electric vehicle plastic part molding lower mold 1, electric vehicle plastic part molding upper mold 2, lower molding surface 3, upper molding surface 4, injection molded part 5, embedded auxiliary molding lower demoulding component 6, secondary upper ejection demoulding part 7, embedded auxiliary molding block 8, molding block connecting part 9, fixed connecting square rod 10, lifting bottom plate 11, fixed base plate 12, ejector fixing plate 13, oil cylinder 14, clamping joint 15, side straight ejector 16, middle straight ejector 17, ejector block connecting rod 18, large area ejector block 19, supporting vertical plate 20, injection molding main board 21, injection molding tube 22. DETAILED DESCRIPTION

[0025] The present invention will be further described below with reference to the accompanying drawings.

[0026] like Figure 1-4 As shown, a secondary ejection mold for electric vehicle plastic parts includes a lower mold 1 for electric vehicle plastic parts and an upper mold 2 for electric vehicle plastic parts. The lower mold 1 for electric vehicle plastic parts is provided with a lower molding surface 3, and the upper mold 2 for electric vehicle plastic parts is provided with an upper molding surface 4. The lower molding surface 3 corresponds to the position of the upper molding surface 4 and the shape is matched. An injection molded part 5 is provided above the upper mold 2 for electric vehicle plastic parts, and an embedded auxiliary molding lower demolding component 6 is provided in the lower molding surface 3. The embedded auxiliary molding lower demolding component 6 is matched with the shape of the upper molding surface 4. A secondary upper ejection mold part 7 is provided below the lower mold 1 for electric vehicle plastic parts, which passes through the lower mold 1 for electric vehicle plastic parts and extends into the lower molding surface 3. The secondary upper ejection mold part 7 and the embedded auxiliary molding lower demolding component 6 are staggered.

[0027] In this embodiment, during the injection molding process, the electric vehicle plastic part molding lower mold 1 and the electric vehicle plastic part molding upper mold 2 are brought close to each other so that the lower molding surface 3 and the upper molding surface 4 are fitted together to form a complete cavity. The embedded auxiliary molding lower demolding component 6 is used to assist in molding the two side structures of the plastic part. The molten material is injected into the cavity through the injection molding part 5. After the injection molding is completed, the electric vehicle plastic part molding lower mold 1 and the electric vehicle plastic part molding upper mold 2 are separated first. At this time, the embedded auxiliary molding lower demolding component 6 is moved downward to drive the electric vehicle plastic part molding lower mold 1 to move downward synchronously. At this time, sufficient demolding space is formed. The ejector structure in the embedded auxiliary molding lower demolding component 6 first performs preliminary ejection and demolding on both sides of the plastic part, and then performs a secondary ejection on the plastic part in all directions through the secondary ejection component 7. The secondary ejection at different positions is adopted to ensure that the plastic part and the lower mold do not stick, the ejection is smooth, and the structure is compact and reasonable.

[0028] Combine Figure 1-4As shown, the embedded auxiliary molding lower demolding component 6 includes two embedded auxiliary molding blocks 8 arranged in the lower molding surface 3. The two embedded auxiliary molding blocks 8 are symmetrically arranged along the center line of the electric vehicle plastic part molding lower mold 1. A molding block connector 9 is provided at the bottom of the embedded auxiliary molding block 8.

[0029] Specifically, during the injection molding process, the embedded auxiliary molding block 8 is used to assist in molding the two side structures of the plastic part. After the injection molding is completed, the molding block connector 9 can move the embedded auxiliary molding block 8 downward, driving the electric vehicle plastic part molding lower mold 1 to move downward synchronously, at this time forming sufficient demolding space.

[0030] The forming block connecting member 9 includes a fixed connecting square rod 10 arranged at the bottom of the embedded auxiliary forming block 8. The fixed connecting square rod 10 is integrally formed with the embedded auxiliary forming block 8. A lifting bottom plate 11 is provided under the electric vehicle plastic part forming lower mold 1. The fixed connecting square rod 10 and the lifting bottom plate 11 are fixed by bolts.

[0031] In this embodiment, after the injection molding is completed, the lifting base plate 11 is moved downward, and the fixed connecting square rod 10 is fixed to the lifting base plate 11 by bolts. The fixed connecting square rod 10 can move the embedded auxiliary molding block 8 downward, driving the electric vehicle plastic part molding lower mold 1 to move downward synchronously, at this time forming sufficient demolding space.

[0032] Combine Figure 2 、 Figure 3 As shown, a fixed base plate 12 and a push rod fixing plate 13 are provided between the lifting base plate 11 and the electric vehicle plastic part molding lower mold 1, the secondary upper ejection part 7 is connected to the push rod fixing plate 13, the fixed connecting square rod 10 passes through the fixed base plate 12 and the push rod fixing plate 13, two oil cylinders 14 are provided on the fixed base plate 12, and a card joint 15 is connected to the power shaft of the oil cylinder 14, and the card joint 15 is card-engaged with the lifting base plate 11.

[0033] In this embodiment, the fixed base plate 12 is used to connect the oil cylinder 14, and the push rod fixing plate 13 is used to fix the push rod. When the embedded auxiliary molding block 8 needs to be moved downward, the oil cylinder 14 is started, and the card joint 15 on the power shaft of the oil cylinder 14 is engaged with the lifting base plate 11, driving the lifting base plate 11, the fixed connecting square rod 10 and the embedded auxiliary molding block 8 to move downward, with a high degree of automation.

[0034] Combine Figure 3 As shown, the embedded auxiliary forming block 8 is provided with a side straight push rod 16 passing through the embedded auxiliary forming block 8 , and the side straight push rod 16 is connected to the push rod fixing plate 13 .

[0035] In this embodiment, after the embedded auxiliary molding block 8 moves downward, the side straight ejector rods 16 are used to perform preliminary ejection and demoulding on both sides of the plastic part.

[0036] The secondary ejector demolding component 7 includes a plurality of middle straight ejector rods 17 which are arranged below the electric vehicle plastic part molding lower mold 1, pass through the electric vehicle plastic part molding lower mold 1 and extend into the lower molding surface 3. The middle straight ejector rods 17 and the side straight ejector rods 16 are parallel to each other. A ejector block connecting rod 18 which passes through the electric vehicle plastic part molding lower mold 1 is also provided below the electric vehicle plastic part molding lower mold 1. A large-area ejector block 19 is provided on the top of the ejector block connecting rod 18, and the large-area ejector block 19 is adapted to the shape of the lower molding surface 3.

[0037] In this embodiment, the ejector pin fixing plate 13 is connected to the middle straight ejector pin 17. After the initial ejection, the ejector pin fixing plate 13 is moved upward, driving the middle straight ejector pin 17, the ejector block connecting rod 18 and the large-area ejection block 19 to move upward, thereby realizing secondary multi-directional ejection and demolding of the plastic part. The use of secondary ejection at different positions ensures that the plastic part does not adhere to the lower mold, the ejection is smooth, and the structure is compact and reasonable.

[0038] Combine Figure 1-2 As shown, a supporting vertical plate 20 is provided between the lower mold 1 for forming the electric vehicle plastic part and the lifting bottom plate 11 .

[0039] In this embodiment, the supporting vertical plate 20 plays a supporting role.

[0040] Combine Figure 1-3 As shown, the injection molded part 5 includes an injection molded main board 21 and an injection molded tube 22 which are arranged above the upper mold 2 for forming the electric vehicle plastic part.

[0041] In this embodiment, during injection molding, the molten material is injected into the mold cavity through the injection molding main plate 21 and the injection molding tube 22 .

[0042] The working principle of this utility model is:

[0043] During the injection molding process, the electric vehicle plastic part molding lower mold 1 and the electric vehicle plastic part molding upper mold 2 are brought close to each other so that the lower molding surface 3 and the upper molding surface 4 fit together to form a complete cavity. The embedded auxiliary molding block 8 is used to assist in molding the two side structures of the plastic part. The molten material is injected into the cavity through the injection molding main board 21 and the injection molding tube 22. After the injection molding is completed, the lifting bottom plate 11 is moved down, and the fixed connecting square rod 10 is fixed to the lifting bottom plate 11 by bolts. The fixed connecting square rod 10 can move the embedded auxiliary molding block 8 downward to drive the electric vehicle plastic part. The lower molding die 1 moves downward synchronously, forming sufficient demoulding space at this time. After the embedded auxiliary molding block 8 moves downward, the side straight ejector rods 16 are used to perform preliminary demoulding on both sides of the plastic part. The ejector rod fixing plate 13 is connected to the middle straight ejector rod 17. After preliminary ejection, the ejector rod fixing plate 13 is moved upward, driving the middle straight ejector rod 17, the ejector block connecting rod 18 and the large-area ejection block 19 to move upward, realizing secondary multi-directional ejection and demoulding of the plastic part. The use of secondary ejection at different positions ensures that the plastic part does not adhere to the lower mold, the ejection is smooth, and the structure is compact and reasonable.

[0044] The fixed base plate 12 is used to connect the oil cylinder 14, and the push rod fixing plate 13 is used to fix the push rod. When the embedded auxiliary molding block 8 needs to be moved downward, the oil cylinder 14 is started, and the card joint 15 on the power shaft of the oil cylinder 14 is engaged with the lifting base plate 11, driving the lifting base plate 11, the fixed connecting square rod 10 and the embedded auxiliary molding block 8 to move downward. The degree of automation is high, and the supporting vertical plate 20 plays a supporting role.

[0045] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described, or replace them with similar methods, without departing from the spirit of the present invention.

[0046] Although this document frequently uses terms such as electric vehicle plastic part molding lower mold 1, electric vehicle plastic part molding upper mold 2, lower molding surface 3, upper molding surface 4, injection molding part 5, embedded auxiliary molding lower demolding assembly 6, secondary ejection demolding part 7, embedded auxiliary molding block 8, molding block connector 9, fixed connecting square rod 10, lifting base plate 11, fixed base plate 12, ejector fixing plate 13, oil cylinder 14, clamping joint 15, side straight ejector 16, middle straight ejector 17, ejector block connecting rod 18, large-area ejector block 19, supporting vertical plate 20, injection molding main board 21, injection molding tube 22, etc., the possibility of using other terms is not excluded. The use of these terms is only for the purpose of more conveniently describing and explaining the essence of the present invention. Interpreting them as any additional restrictions is contrary to the spirit of the present invention.

Claims

1. A secondary ejection mold for electric vehicle plastic parts, comprising a lower mold (1) for forming electric vehicle plastic parts and an upper mold (2) for forming electric vehicle plastic parts, characterized in that: The electric vehicle plastic part molding lower mold (1) is provided with a lower molding surface (3), the electric vehicle plastic part molding upper mold (2) is provided with an upper molding surface (4), the lower molding surface (3) corresponds to the position of the upper molding surface (4) and the shape is matched, an injection molded part (5) is provided above the electric vehicle plastic part molding upper mold (2), the lower molding surface (3) is provided with an embedded auxiliary molding lower demoulding component (6), the embedded auxiliary molding lower demoulding component (6) is matched with the shape of the upper molding surface (4), and a secondary top demoulding component (7) is provided below the electric vehicle plastic part molding lower mold (1) that passes through the electric vehicle plastic part molding lower mold (1) and extends into the lower molding surface (3), and the secondary top demoulding component (7) and the embedded auxiliary molding lower demoulding component (6) are staggered.

2. The secondary ejection mold for electric vehicle plastic parts according to claim 1, characterized in that: The embedded auxiliary molding lower demoulding assembly (6) comprises two embedded auxiliary molding blocks (8) arranged in the lower molding surface (3), the two embedded auxiliary molding blocks (8) are symmetrically arranged along the center line of the electric vehicle plastic part molding lower mold (1), and the bottom of the embedded auxiliary molding block (8) is provided with a molding block connector (9).

3. The secondary ejection mold for electric vehicle plastic parts according to claim 2, characterized in that: The molding block connector (9) comprises a fixed connecting square rod (10) arranged at the bottom of the embedded auxiliary molding block (8), the fixed connecting square rod (10) and the embedded auxiliary molding block (8) are integrally formed, and a lifting bottom plate (11) is provided below the electric vehicle plastic part molding lower mold (1), and the fixed connecting square rod (10) and the lifting bottom plate (11) are fixed by bolts.

4. The secondary ejection mold for electric vehicle plastic parts according to claim 3, characterized in that: A fixed base plate (12) and a push rod fixing plate (13) are provided between the lifting bottom plate (11) and the electric vehicle plastic part molding lower mold (1); the secondary ejection demoulding component (7) is connected to the push rod fixing plate (13); and the fixed connecting square rod (10) passes through the fixed base plate (12) and the push rod fixing plate (13).

5. The secondary ejection mold for electric vehicle plastic parts according to claim 4, characterized in that: Two oil cylinders (14) are provided on the fixed base plate (12), and a clamping joint (15) is connected to the power shaft of the oil cylinder (14), and the clamping joint (15) is clamped and matched with the lifting base plate (11).

6. The secondary ejection mold for electric vehicle plastic parts according to claim 5, characterized in that: The embedded auxiliary forming block (8) is provided with a side straight push rod (16) passing through the embedded auxiliary forming block (8), and the side straight push rod (16) is connected to the push rod fixing plate (13).

7. The secondary ejection mold for electric vehicle plastic parts according to claim 6, characterized in that: The secondary ejector (7) comprises a plurality of middle straight ejector rods (17) arranged below the lower mold (1) for forming the electric vehicle plastic part, passing through the lower mold (1) for forming the electric vehicle plastic part and extending into the lower molding surface (3); the middle straight ejector rods (17) and the side straight ejector rods (16) are parallel to each other.

8. The secondary ejection mold for electric vehicle plastic parts according to claim 7, characterized in that: A top block connecting rod (18) passing through the electric vehicle plastic part forming lower mold (1) is further provided below the electric vehicle plastic part forming lower mold (1), and a large-area ejection block (19) is provided on the top of the ejection block connecting rod (18), and the large-area ejection block (19) is adapted to the shape of the lower molding surface (3).

9. The secondary ejection mold for electric vehicle plastic parts according to claim 8, characterized in that: A supporting vertical plate (20) is provided between the electric vehicle plastic part molding lower die (1) and the lifting bottom plate (11).

10. The secondary ejection mold for electric vehicle plastic parts according to claim 9, characterized in that: The injection molded part (5) comprises an injection molded main board (21) and an injection molded tube (22) arranged above an upper mold (2) for molding an electric vehicle plastic part.

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