Quick-cooling and quick-heating injection mold for highlight automobile exterior trimming part

Abstract

The utility model belongs to the technical field of molds, and particularly relates to a quick-cooling and quick-heating injection mold for a highlight automobile exterior trimming part. The outer decorative part forming mold comprises an outer decorative part forming lower mold and an outer decorative part forming upper mold, and an injection molding part is arranged above the outer decorative part forming upper mold. According to the utility model, the exterior trimming part forming lower mold and the exterior trimming part forming upper mold are close to each other, so that the two lower mold forming insert panels and the upper mold forming insert panel are attached to each other, the forming bulges and the forming concave cavities are matched to form two complete cavities, and a molten material is injected into the cavities through the injection molding parts; cooling water is synchronously injected into the lower cooling structure and the upper cooling structure, the upper surface and the lower surface of a molded plastic part are cooled in an all-around and large-range mode through the lower cooling structure and the upper cooling structure, rapid transition from rapid heating to rapid cooling of molten materials is achieved, the solidification speed of the plastic part is increased, the injection molding period is shortened, and the injection molding efficiency is improved. Meanwhile, thermal deformation and bubbles of the plastic part can be reduced, the glossiness is high, and the overall quality of the plastic part is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of molds and relates to a high-gloss injection mold for rapidly cooling and heating automotive exterior parts. Background Art

[0002] A mold is various molds and tools used in industrial production to obtain required products through injection molding, blow molding, extrusion, die casting, forging, smelting, stamping, etc. In short, a mold is a tool for making formed articles. This tool is composed of various parts, and different molds are composed of different parts. It mainly realizes the processing of the outer shape of articles by changing the physical state of the formed material. It is known as the "mother of industry". It is a tool that makes a blank into a workpiece with a specific shape and size under the action of external force. It is widely used in blanking, die forging, cold heading, extrusion, powder metallurgy part pressing, pressure casting, and the compression molding or injection molding of products such as engineering plastics, rubber, and ceramics. Among them, with the demand for automotive lightweighting, automotive exterior parts are gradually becoming plastic materials and are injection molded through injection molds. In the injection process of existing automotive exterior part molds, due to the large area of automotive exterior part plastic parts, it is difficult to cool the upper and lower surfaces of the plastic parts in a full range and large area during cooling after injection molding. The solidification speed of the plastic parts is slow, the injection cycle is long, and the thermal deformation and bubbles of the plastic parts will be large, affecting the overall quality of the plastic parts. Therefore, there is an urgent need to design a high-gloss injection mold for rapidly cooling and heating automotive exterior parts that can overcome the above defects.

[0003] In order to overcome the deficiencies of the prior art, people have continuously explored and proposed various solutions. For example, a Chinese patent discloses an automotive exterior part mold [Application No.: 202023332415.9]. An upper shortened working belt and an upper enlarged shunt hole circumcircle are arranged inside the upper die base, and both the upper shortened working belt and the upper enlarged shunt hole circumcircle are integrally structured with the upper die base. A lower shortened working belt and a lower enlarged shunt hole circumcircle are arranged inside the lower die base, and both the lower shortened working belt and the lower enlarged shunt hole circumcircle are integrally structured with the lower die base. An upper welding chamber is arranged inside the upper die base, and the upper welding chamber is integrally structured with the upper die base. A lower welding chamber is arranged inside the lower die base, and the lower welding chamber is integrally structured with the lower die base. Summary of the Invention

[0004] The purpose of the utility model is to provide a high-gloss injection mold for rapidly cooling and heating automotive exterior parts in view of the above problems.

[0005] To achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A rapid cooling and heating injection mold for a high-gloss automotive exterior part, comprising a lower mold for forming the exterior part and an upper mold for forming the exterior part. An injection part is arranged above the upper mold for forming the exterior part. Two lower mold forming panels and an upper mold forming panel are arranged between the lower mold for forming the exterior part and the upper mold for forming the exterior part. Forming protrusions are arranged in the lower mold forming panels, and forming cavities are arranged in the upper mold forming panel. The positions of the forming protrusions and the forming cavities correspond to each other and their shapes are matched. A lower cooling structure is arranged in the lower mold forming panel, and an upper cooling structure is arranged in the upper mold forming panel. The lower cooling structure and the upper cooling structure are arranged in an alternating manner. An embedded ejection and demolding assembly is arranged in the lower mold forming panel, and the embedded ejection and demolding assembly is slidably matched with the lower mold forming panel.

[0007] In the above-mentioned rapid cooling and heating injection mold for a high-gloss automotive exterior part, the lower cooling structure includes a plurality of radial cooling channels arranged in the lower mold forming panel. The radial cooling channels penetrate through the lower mold forming panel and are arranged in an alternating manner with the embedded ejection and demolding assembly.

[0008] In the above-mentioned rapid cooling and heating injection mold for a high-gloss automotive exterior part, a plurality of lower connecting channels are arranged in the lower mold for forming the exterior part. The lower connecting channels are communicated with the radial cooling channels.

[0009] In the above-mentioned rapid cooling and heating injection mold for a high-gloss automotive exterior part, the upper cooling structure includes a plurality of axial cooling channels arranged in the upper mold forming panel. The axis of the axial cooling channels is perpendicular to the axis of the radial cooling channels.

[0010] In the above-mentioned rapid cooling and heating injection mold for a high-gloss automotive exterior part, a plurality of upper connecting channels are arranged in the upper mold for forming the exterior part. The upper connecting channels are communicated with the axial cooling channels.

[0011] In the above-mentioned rapid cooling and heating injection mold for a high-gloss automotive exterior part, the embedded ejection and demolding assembly includes a plurality of embedded ejection blocks arranged in the lower mold forming panel. The shapes of the embedded ejection blocks are matched with the forming protrusions, and the embedded ejection blocks are slidably matched with the lower mold forming panel.

[0012] In the above-mentioned rapid cooling and heating injection mold for a high-gloss automotive exterior part, a slant ejector rod is arranged at the bottom of the embedded ejection block, and the slant ejector rod is arranged obliquely.

[0013] In the above-mentioned rapid cooling and heating injection mold for a high-gloss automotive exterior part, an ejection connecting plate is arranged below the lower mold for forming the exterior part, and the slant ejector rod is connected with the ejection connecting plate.

[0014] In the above-mentioned high-gloss automotive exterior component rapid heating and cooling injection mold, a plurality of straight ejector rods are provided on the ejector connection plate, and the straight ejector rods penetrate through the lower mold forming panel and are arranged staggered with the embedded ejector blocks.

[0015] In the above-mentioned high-gloss automotive exterior component rapid heating and cooling injection mold, the injection molded part includes an injection main board and an injection manifold plate arranged above the exterior component forming upper mold.

[0016] Compared with the existing technology, the advantages of the present utility model are as follows:

[0017] 1. In the present utility model, the exterior component forming lower mold and the exterior component forming upper mold are brought closer to each other, so that the two lower mold forming panels and one upper mold forming panel are fitted together, and the forming protrusions and the forming cavities cooperate to form two complete cavities. The molten material is injected into the cavities through the injection molded part. After the injection molding is completed, cooling water is synchronously injected into the lower cooling structure and the upper cooling structure, and the upper and lower surfaces of the molded plastic part are cooled in a full range and a large range by the lower cooling structure and the upper cooling structure, realizing a rapid transition of the molten material from rapid heating to rapid cooling, accelerating the solidification speed of the plastic part, shortening the injection molding cycle, and at the same time reducing the thermal deformation and bubbles of the plastic part, with high gloss and improving the overall quality of the plastic part.

[0018] 2. During the injection molding of the present utility model, the embedded ejector blocks can cooperate with the forming protrusions to form the lower structure of the plastic part. After the injection molding and cooling are completed, the mold is opened and the ejector connection plate is moved. The ejector connection plate drives the inclined ejector rods and the embedded ejector blocks to perform inclined ejection demolding. The straight ejector rods play a straight ejection role, forming a combined inclined and straight ejection demolding. The ejection area is large and the ejection effect is good.

[0019] Other advantages, objectives and features of the present utility model will be partially reflected by the following description, and partially will also be understood by those skilled in the art through the research and practice of the present utility model. Brief Description of the Drawings

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

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

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

[0023] Figure 4 is a schematic partial structural diagram of the present utility model in another direction.

[0024] Figure 5 is a schematic structural diagram of the embedded ejector demolding assembly.

[0025] Figure 6It is a schematic structural diagram of the upper mold forming panel.

[0026] In the figure: the lower mold 1 for forming the exterior trim part, the upper mold 2 for forming the exterior trim part, the injection molded part 3, the lower mold forming panel 4, the upper mold forming panel 5, the forming protrusion 6, the forming cavity 7, the lower cooling structure 8, the upper cooling structure 9, the embedded ejecting and demolding assembly 10, the radial cooling channel 11, the lower connecting channel 12, the axial cooling channel 13, the upper connecting channel 14, the embedded ejecting block 15, the angled ejector rod 16, the ejecting connecting plate 17, the straight ejector rod 18, the injection main board 19, the injection flow splitter plate 20. Specific embodiments

[0027] The present utility model will be further described below with reference to the accompanying drawings.

[0028] As Figures 1-6 shown, a high-gloss automotive exterior trim part rapid cooling and heating injection mold includes a lower mold 1 for forming the exterior trim part and an upper mold 2 for forming the exterior trim part. An injection molded part 3 is provided above the upper mold 2 for forming the exterior trim part. Two lower mold forming panels 4 and an upper mold forming panel 5 are provided between the lower mold 1 for forming the exterior trim part and the upper mold 2 for forming the exterior trim part. A forming protrusion 6 is provided in the lower mold forming panel 4, and a forming cavity 7 is provided in the upper mold forming panel 5. The positions of the forming protrusion 6 and the forming cavity 7 correspond to each other and the shapes are matched. A lower cooling structure 8 is provided in the lower mold forming panel 4, and an upper cooling structure 9 is provided in the upper mold forming panel 5. The lower cooling structure 8 and the upper cooling structure 9 are arranged in an interleaved manner. An embedded ejecting and demolding assembly 10 is provided in the lower mold forming panel 4, and the embedded ejecting and demolding assembly 10 is slidably matched with the lower mold forming panel 4.

[0029] In this embodiment, the lower mold 1 for forming the exterior trim part and the upper mold 2 for forming the exterior trim part are moved closer to each other, so that the two lower mold forming panels 4 and the upper mold forming panel 5 are fitted together, and the forming protrusion 6 and the forming cavity 7 are cooperated to form two complete cavities. The molten material is injected into the cavities through the injection molded part 3. After the injection is completed, cooling water is synchronously injected into the lower cooling structure 8 and the upper cooling structure 9. The upper and lower surfaces of the molded plastic part are cooled in a full range and a large range by the lower cooling structure 8 and the upper cooling structure 9, realizing a rapid transition of the molten material from rapid heating to rapid cooling, accelerating the solidification speed of the plastic part, shortening the injection cycle, and at the same time reducing the thermal deformation and bubbles of the plastic part, with high gloss and improving the overall quality of the plastic part.

[0030] Combined with Figures 1-6As shown, the lower cooling structure 8 includes a plurality of radial cooling channels 11 disposed within the lower mold forming panel 4. The radial cooling channels 11 penetrate through the lower mold forming panel 4 and are staggered with the embedded ejection and demolding assembly 10. A plurality of lower connecting channels 12 are provided within the exterior part forming lower mold 1, and the lower connecting channels 12 communicate with the radial cooling channels 11.

[0031] In this embodiment, after injection molding is completed, cooling water is introduced into the lower connecting channels 12 and enters the radial cooling channels 11 through the lower connecting channels 12, cooling the lower surface of the plastic part in multiple directions over a large range, and the cooling effect is good.

[0032] The upper cooling structure 9 includes a plurality of axial cooling channels 13 disposed within the upper mold forming panel 5. The axis of the axial cooling channels 13 is perpendicular to the axis of the radial cooling channels 11. A plurality of upper connecting channels 14 are provided within the exterior part forming upper mold 2, and the upper connecting channels 14 communicate with the axial cooling channels 13.

[0033] In this embodiment, after injection molding is completed, cooling water is introduced into the upper connecting channels 14 and enters the axial cooling channels 13 through the upper connecting channels 14, cooling the upper surface of the plastic part in multiple directions over a large range, and the cooling effect is good.

[0034] The embedded ejection and demolding assembly 10 includes a plurality of embedded ejection blocks 15 disposed within the lower mold forming panel 4. The embedded ejection blocks 15 are adapted to the shape of the forming protrusions 6. The embedded ejection blocks 15 are slidably engaged with the lower mold forming panel 4. An inclined ejector rod 16 is provided at the bottom of the embedded ejection block 15. The inclined ejector rod 16 is inclined. An ejection connecting plate 17 is provided below the exterior part forming lower mold 1. The inclined ejector rod 16 is connected to the ejection connecting plate 17. A plurality of straight ejector rods 18 are provided on the ejection connecting plate 17. The straight ejector rods 18 penetrate through the lower mold forming panel 4 and are staggered with the embedded ejection blocks 15.

[0035] In this embodiment, during injection molding, the embedded ejection blocks 15 can cooperate with the forming protrusions 6 to form the lower structure of the plastic part. After injection molding and cooling are completed, the mold is opened and the ejection connecting plate 17 is moved. The inclined ejector rod 16 and the embedded ejection blocks 15 are driven by the ejection connecting plate 17 for inclined ejection and demolding. The straight ejector rods 18 play a straight ejection role, forming a combined inclined and straight ejection and demolding, with a large ejection area and good ejection effect.

[0036] Combined Figures 1-2 As shown, the injection molded part 3 includes an injection main board 19 and an injection manifold 20 disposed above the exterior part forming upper mold 2.

[0037] In this embodiment, during injection molding, the molten material is injected from the injection molding main board 19, and then is branched through the injection molding splitter plate 20 and enters the mold cavity.

[0038] The working principle of the present utility model is as follows:

[0039] The lower mold for exterior part molding 1 and the upper mold for exterior part molding 2 are moved closer to each other, so that the two lower mold molding inserts 4 and one upper mold molding insert 5 are fitted together, and the molding protrusions 6 and the molding cavities 7 cooperate to form two complete mold cavities. The molten material is injected from the injection molding main board 19, and then is branched through the injection molding splitter plate 20 and enters the mold cavity. After the injection molding is completed, cooling water is introduced into the lower connecting channel 12, and enters the radial cooling channel 11 through the lower connecting channel 12 to cool the lower surface of the plastic part in a multi-directional and large range. Cooling water is introduced into the upper connecting channel 14, and enters the axial cooling channel 13 through the upper connecting channel 14 to cool the upper surface of the plastic part in a multi-directional and large range. The cooling effect is good, realizing a rapid transition of the molten material from rapid heating to rapid cooling, accelerating the solidification speed of the plastic part, shortening the injection molding cycle, and at the same time reducing the thermal deformation and bubbles of the plastic part, with high gloss and improving the overall quality of the plastic part.

[0040] During injection molding, the embedded ejector block 15 can cooperate with the molding protrusion 6 to form the lower structure of the plastic part. After the injection molding and cooling are completed, the mold is opened and the ejector connecting plate 17 is moved. The angled ejector rod 16 and the embedded ejector block 15 are driven by the ejector connecting plate 17 for angled ejection demolding. The straight ejector rod 18 plays a role of straight ejection, forming a combined angled and straight ejection demolding. The ejection area is large and the ejection effect is good.

[0041] The specific embodiments described herein are merely illustrative of the spirit of the present utility model. Those skilled in the technical field to which the present utility model pertains can make various modifications or supplements to the described specific embodiments or use similar methods for substitution, but will not deviate from the spirit of the present utility model.

[0042] Although terms such as the lower mold for exterior part molding 1, the upper mold for exterior part molding 2, the injection molded part 3, the lower mold molding insert 4, the upper mold molding insert 5, the molding protrusion 6, the molding cavity 7, the lower cooling structure 8, the upper cooling structure 9, the embedded ejection demolding assembly 10, the radial cooling channel 11, the lower connecting channel 12, the axial cooling channel 13, the upper connecting channel 14, the embedded ejector block 15, the angled ejector rod 16, the ejector connecting plate 17, the straight ejector rod 18, the injection molding main board 19, and the injection molding splitter plate 20 are used more frequently in this article, the possibility of using other terms is not excluded. The use of these terms is only for more conveniently describing and explaining the essence of the present utility model, and interpreting them as any additional limitation is contrary to the spirit of the present utility model.

Claims

1. A high-gloss automobile exterior trim rapid cooling and rapid heating injection mold, comprising an exterior trim molding lower mold (1) and an exterior trim molding upper mold (2), characterized in that: An injection molded part (3) is arranged above the exterior molding upper mold (2); two lower mold molding panels (4) and one upper mold molding panel (5) are arranged between the exterior molding lower mold (1) and the exterior molding upper mold (2); a molding protrusion (6) is arranged inside the lower mold molding panel (4); a molding cavity (7) is arranged inside the upper mold molding panel (5); the molding protrusion (6) corresponds to the position of the molding cavity (7) and the shape is matched; a lower cooling structure (8) is arranged inside the lower mold molding panel (4); an upper cooling structure (9) is arranged inside the upper mold molding panel (5); the lower cooling structure (8) and the upper cooling structure (9) are arranged alternately; an embedded ejection demoulding component (10) is arranged inside the lower mold molding panel (4); the embedded ejection demoulding component (10) is slidably matched with the lower mold molding panel (4).

2. The high-gloss automobile exterior parts rapid cooling and heating injection mold according to claim 1 is characterized in that: The lower cooling structure (8) comprises a plurality of radial cooling channels (11) arranged in the lower mold forming panel (4), wherein the radial cooling channels (11) penetrate through the lower mold forming panel (4) and are arranged in an interlaced manner with the embedded ejection demoulding components (10).

3. The high-gloss automobile exterior parts rapid cooling and heating injection mold according to claim 2 is characterized in that: A plurality of lower connecting channels (12) are arranged in the exterior trim molding lower die (1), and the lower connecting channels (12) are connected to the radial cooling channels (11).

4. The high-gloss automobile exterior parts rapid cooling and heating injection mold according to claim 3 is characterized in that: The upper cooling structure (9) comprises a plurality of axial cooling channels (13) arranged in the upper mold forming panel (5), wherein the axis center lines of the axial cooling channels (13) and the axis center lines of the radial cooling channels (11) are perpendicular to each other.

5. The high-gloss automobile exterior parts rapid cooling and heating injection mold according to claim 4, characterized in that: A plurality of upper connecting channels (14) are arranged in the exterior trim molding upper die (2), and the upper connecting channels (14) are connected to the axial cooling channels (13).

6. The high-gloss automobile exterior parts rapid cooling and heating injection mold according to claim 5, characterized in that: The embedded ejection demoulding assembly (10) comprises a plurality of embedded ejection blocks (15) arranged in the lower mold forming panel (4), the embedded ejection blocks (15) are adapted to the shape of the forming protrusions (6), and the embedded ejection blocks (15) are slidably matched with the lower mold forming panel (4).

7. The high-gloss automobile exterior trim rapid cooling and heating injection mold according to claim 6, characterized in that: The bottom of the embedded ejection block (15) is provided with an inclined ejector rod (16), and the inclined ejector rod (16) is arranged in an inclined manner.

8. The high-gloss automobile exterior parts rapid cooling and heating injection mold according to claim 7, characterized in that: An ejector connecting plate (17) is provided below the exterior trim molding lower die (1), and the inclined ejector rod (16) is connected to the ejector connecting plate (17).

9. The high-gloss automobile exterior parts rapid cooling and heating injection mold according to claim 8, characterized in that: A plurality of straight ejector rods (18) are arranged on the ejection connecting plate (17), and the straight ejector rods (18) penetrate through the lower mold forming panel (4) and are arranged alternately with the embedded ejection blocks (15).

10. The high-gloss automobile exterior parts rapid cooling and heating injection mold according to claim 9, characterized in that: The injection molded part (3) comprises an injection molded main board (19) and an injection molded diverter plate (20) which are arranged above the exterior molding upper mold (2).

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