Demolding mechanism for exterior trimming part mold of new energy automobile
By using slider release components and high-temperature and high-pressure gas injection technology in new energy vehicle exterior parts molds, the problem of demolding difficulties caused by cooling stress is solved, and efficient demolding and product protection are achieved.
Patent Information
- Application Number
- CN202422544250.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-21
- Publication Date
- 2025-08-15
- Estimated Expiration
- 2034-10-21
AI Technical Summary
During the cooling process of the exterior parts of new energy vehicles, the physical adsorption force on the mold surface increases due to shrinkage stress. The friction force is high during demolding, which can easily cause the mold to pull and plastic parts and damage the product.
The slider release assembly is combined with high-temperature and high-pressure gas injection technology, and the principle of thermal expansion and contraction is used to reduce the physical adsorption force between the product and the mold. The high-temperature and high-pressure gas is sprayed to the side of the product through a high-pressure nozzle, increasing the gap and injecting gas, reducing friction, and the slider slides along the rear template to achieve mold release.
It improves the mold release effect, reduces the pulling of molds and plastic parts, avoids product damage, reduces energy consumption and improves mold release efficiency.
Smart Images
Figure CN223223800U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of molds and relates to a demoulding mechanism for a mold of an exterior decoration part of a new energy vehicle. Background Art
[0002] New energy vehicle exterior trim refers to the observable parts of the vehicle body other than the body itself, mainly including bumpers, air intake grilles, side skirts, headlight mounting frames, pillar decorative panels and sunroofs, etc. Most of them are deep-cavity shell products with buckles or steps formed on their sides, and are generally demolded by core pulling with sliders.
[0003] During the cooling process, these injection molded products release significant shrinkage stress, which increases the physical adhesion to the mold surface. This leads to greater friction between the mold and the part during demolding, which can easily cause the mold and part to pull apart. Therefore, improvements are needed to enhance demolding efficiency and prevent damage to the product. Utility Model Content
[0004] The purpose of this utility model is to address the above-mentioned problems in the existing technology and to propose a demoulding mechanism for a mold of an exterior trim part of a new energy vehicle.
[0005] The purpose of the utility model can be achieved through the following technical solutions: a demoulding mechanism for a mold of an exterior trim part of a new energy vehicle, comprising a front template, a rear template and a slider demoulding assembly, wherein the front template and the rear template are respectively provided with a female mold core and a male mold core, the female mold core and the male mold core are buckled to form a cavity for molding the product, the slider demoulding assembly comprises a slider and an oblique support pin, the oblique support pin is fixedly connected to the front template and slidably penetrates the slider, and when the front template and the rear template are parted, the slider can be driven to slide along the rear template to the side away from the product to realize demoulding, and a heat insulation box is embedded in the rear template, and a heating chamber for storing gas is provided in the heat insulation box, and the heating chamber is provided with a heat insulation box. An electric heating tube is provided, and an air inlet nozzle for connecting to an air source device is provided on one side of the rear template. The air inlet nozzle is connected to the heating chamber through the air inlet pipe. A step is provided on the side where the slider fits with the male mold core, and a recess is provided on the male mold core for the step to be embedded. A high-pressure nozzle facing the product is embedded in the step. The heat insulation box is connected to a connecting nozzle embedded in the rear template and connected to the bottom of the slider. The connecting nozzle has an air hole running through it, and a compression spring is provided in the air hole. A spherical card is connected to the compression spring, and the card is provided with a secondary air hole in the same direction as the air hole. An arc-shaped limit groove is provided at the bottom of the slider for the card to be embedded, and the high-pressure nozzle is connected to the limit groove.
[0006] Preferably, a reset assembly for resetting the slider is provided on one side of the rear template, and the reset assembly includes a reset plate, a reset rod and a reset spring. The reset plate is fixedly connected to one side of the rear template, and the reset rod is slidably passed through the reset plate. The inner end of the reset rod is fixedly connected to the side of the slider opposite to the step, and the reset spring is sleeved outside the reset rod, and its two ends are respectively abutted against the reset plate and the outer end of the reset rod.
[0007] Preferably, the heat-insulating box is connected to a barometer for measuring the air pressure in the heating chamber, and the heat-insulating box is also connected to a thermometer for measuring the temperature in the heating chamber.
[0008] Preferably, a sealing gasket is fixedly connected to the inner surface of the limiting groove.
[0009] Compared with the prior art, the utility model has the following advantages:
[0010] High-temperature and high-pressure gas is sprayed toward the lower side of the product. The principle of thermal expansion and contraction is used to slightly increase the gap between the plastic product and the mold due to its expansion. A certain amount of gas is injected into the gap to reduce the physical adsorption force between the product and the mold surface, reduce the pulling between the mold and the plastic part, improve the demoulding effect, and avoid damage to the product. BRIEF DESCRIPTION OF THE DRAWINGS
[0011] Figure 1 It is a schematic diagram of the overall cross-sectional structure of the utility model.
[0012] Figure 2 yes Figure 1 Enlarged schematic diagram of the structure at point A.
[0013] In the figure, 1. front template; 11. female mold core; 2. rear template; 21. male mold core; 211. clearance groove; 3. slider demoulding assembly; 31. slider; 311. step; 312. limit groove; 313. sealing gasket; 32. diagonal support pin; 4. mold cavity; 5. heat insulation box; 51. heating cavity; 52. electric heating tube; 53. barometer; 54. thermometer; 6. air inlet nozzle; 61. air inlet pipe; 7. high-pressure nozzle; 8. connecting nozzle; 81. air hole; 82. compression spring; 83. card bead; 831. secondary air hole; 9. reset assembly; 91. reset plate; 92. reset rod; 93. reset spring. DETAILED DESCRIPTION
[0014] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.
[0015] like Figure 1-Figure 2As shown, a demoulding mechanism for a mold of a new energy vehicle exterior trim part comprises a front template 1, a rear template 2 and a slider demoulding assembly 3, wherein the front template 1 and the rear template 2 are respectively provided with a female mold core 11 and a male mold core 21, and the female mold core 11 and the male mold core 21 are buckled together to form a cavity 4 for molding a product, and the slider demoulding assembly 3 comprises a slider 31 and an oblique support pin 32, wherein the oblique support pin 32 is fixedly connected to the front template 1 and slidably penetrates the slider 31, and when the front template 1 and the rear template 2 are parted, the slider 31 can be driven to slide along the rear template 2 toward the side away from the product to realize demoulding, and is characterized in that a heat insulation box 5 is embedded in the rear template 2, and a heating chamber 51 for storing gas is provided in the heat insulation box 5, and an electric heating pipe 52 is provided in the heating chamber 51, and a gas heater 52 is provided on one side of the rear template 2. The air inlet nozzle 6 is connected to the air source equipment, and the air inlet nozzle 6 is connected to the heating chamber 51 through the air inlet pipe 61. The slider 31 has a step 311 on the side that fits with the male mold core 21. The male mold core 21 has a makeshift groove 211 for the step 311 to be embedded. The step 311 is embedded with a high-pressure nozzle 7 facing the product. The heat insulation box 5 is connected to a connecting nozzle 8 embedded in the rear template 2 and connected to the bottom of the slider 31. The connecting nozzle 8 has an air hole 81 running through it, and a compression spring 82 is provided in the air hole 81. A spherical clamping bead 83 is connected to the compression spring 82. The clamping bead 83 is provided with a secondary air hole 831 in the same direction as the air hole 81. The bottom of the slider 31 is provided with an arc-shaped limiting groove 312 for the clamping bead 83 to be embedded, and the high-pressure nozzle 7 is connected to the limiting groove 312.
[0016] The working principle of the present invention in actual application is as follows: during demoulding, first, the air source device air inlet nozzle 6 is connected, and gas is injected into the heating chamber 51 through the air inlet pipe 61. The gas is heated by the electric heating tube 52 to form high-temperature and high-pressure gas. The front template 1 and the rear template 2 are separated, which can drive the slider 31 to slide along the rear template 2 to the side away from the product until the card bead 83 is embedded in the limit groove 312. The card bead 83 plays a positioning role. The high-temperature and high-pressure gas in the heating chamber 51 passes through the air hole 81 and the secondary air hole 831 in turn, and is finally further pressurized and sprayed toward the lower end of the side of the product through the high-pressure nozzle 7. The principle of thermal expansion and contraction is used to make the gap between the plastic product and the mold slightly larger due to heating and expansion. At the same time, a part of the gas will be filled into the above gap, reducing the physical adsorption force between the product and the mold surface. Finally, the mold is pushed out as a whole through the ejector pin, which can effectively improve the demoulding effect and avoid damage to the product.
[0017] When the mold is closed, the high-pressure nozzle 7 is placed into the clearance groove 211 along with the step 311, which prevents the molten plastic in the cavity 4 from entering the high-pressure nozzle 7 during injection molding, and the high-pressure nozzle 7 will not affect the pressure holding of the injection molded product. The heat insulation box 5 prevents the high-temperature gas from directly contacting the rear template 2 to produce a thermal bridge effect, thereby reducing energy consumption and avoiding affecting other cooling systems of the mold.
[0018] In this embodiment, a reset assembly 9 for resetting the slider 31 is provided on one side of the rear template 2. The reset assembly 9 includes a reset plate 91, a reset rod 92 and a reset spring 93. The reset plate 91 is fixedly connected to one side of the rear template 2, and the reset rod 92 is slidably passed through the reset plate 91. The inner end of the reset rod 92 is fixedly connected to the side of the slider 31 opposite to the step 311. The reset spring 93 is sleeved on the outside of the reset rod 92, and its two ends are respectively abutted against the outer ends of the reset plate 91 and the reset rod 92.
[0019] When closing the mold, the inclined support pin 32 is inserted into the slider 31 and drives the slider 31 to fit with the male mold core 21. During this period, the slider 31 drives the reset rod 92 to slide along the reset plate 91 to compress the reset spring 93. When opening the mold, the inclined support pin 32 is pulled away from the slider 31, and the reset spring 93 squeezes the end of the reset rod 92 to drive the slider 31 away from the male mold core 21. The reset component 9 is set on the side away from the step 311 to avoid interference with the high-pressure nozzle 7, which causes mutual influence and reduces the demoulding efficiency.
[0020] The heat-insulating box 5 is connected to a barometer 53 for measuring the air pressure in the heating chamber 51 . The heat-insulating box 5 is also connected to a thermometer 54 for measuring the temperature in the heating chamber 51 .
[0021] Very few products will get stuck during demoulding and require manual demoulding. It should be noted that during manual demoulding, the pressure gauge 53 and the thermometer 54 should be observed to ensure that the high-temperature and high-pressure gas in the heating chamber 51 is emptied to increase the safety of the operator.
[0022] A sealing gasket 313 is fixedly connected to the inner surface of the limiting groove 312. The sealing gasket 313 acts as a buffer when the card bead 82 is inserted into the limiting groove 312 and prevents high-temperature and high-pressure gas from leaking from the peripheral wall of the limiting groove 312.
[0023] The specific embodiments described herein are merely illustrative of the spirit of the present invention. Persons skilled in the art may make various modifications, additions, or substitutions to the described specific embodiments without departing from the spirit of the present invention or exceeding the scope defined by the appended claims.
Claims
1. A new energy vehicle exterior trim mold demoulding mechanism, comprising a front template (1), a rear template (2) and a slider demoulding assembly (3), wherein the front template (1) and the rear template (2) are respectively provided with a female mold core (11) and a male mold core (21), the female mold core (11) and the male mold core (21) are buckled together to form a cavity (4) for molding a product, the slider demoulding assembly (3) comprises a slider (31) and an inclined support pin (32), the inclined support pin (32) is fixedly connected to the front template (1) and slidably penetrated in the slider (31), and when the front template (1) and the rear template (2) are parted, the slider (31) can be driven to slide along the rear template (2) toward the side away from the product to achieve demoulding, characterized in that The rear template (2) is embedded with a heat-insulating box (5), which has a heating chamber (51) for storing gas, and an electric heating pipe (52) is provided in the heating chamber (51). An air inlet nozzle (6) for connecting to an air source device is provided on one side of the rear template (2), and the air inlet nozzle (6) is connected to the heating chamber (51) through an air inlet pipe (61). The slider (31) has a step (311) on the side where it fits with the male mold core (21), and the male mold core (21) has a recess (211) for the step (311) to be embedded, and a gas outlet (52) is embedded in the step (311) facing the product. The high-pressure nozzle (7) is connected to the heat-insulating box (5) with a connecting nozzle (8) embedded in the rear template (2) and connected to the bottom of the slider (31). The connecting nozzle (8) has an air hole (81) running through it. A compression spring (82) is provided in the air hole (81). A spherical clamping bead (83) is connected to the compression spring (82). The clamping bead (83) is provided with a secondary air hole (831) in the same direction as the air hole (81). The bottom of the slider (31) is provided with an arc-shaped limiting groove (312) for the clamping bead (83) to be embedded. The high-pressure nozzle (7) is connected to the limiting groove (312).
2. A new energy vehicle exterior trim mold demoulding mechanism according to claim 1, characterized in that: A reset assembly (9) for resetting the slider (31) is provided on one side of the rear template (2). The reset assembly (9) comprises a reset plate (91), a reset rod (92) and a reset spring (93). The reset plate (91) is fixedly connected to one side of the rear template (2). The reset rod (92) is slidably inserted into the reset plate (91). The inner end of the reset rod (92) is fixedly connected to one side of the step (311) on the slider (31). The reset spring (93) is sleeved outside the reset rod (92). The two ends of the reset spring respectively abut against the outer ends of the reset plate (91) and the reset rod (92).
3. A new energy vehicle exterior trim mold demoulding mechanism according to any one of claims 1 or 2, characterized in that: The heat-insulating box (5) is connected to a barometer (53) for measuring the air pressure in the heating chamber (51), and the heat-insulating box (5) is also connected to a thermometer (54) for measuring the temperature in the heating chamber (51).
4. A new energy vehicle exterior trim mold demoulding mechanism according to any one of claims 1 or 2, characterized in that: A layer of sealing gasket (313) is fixedly connected to the inner surface of the limiting groove (312).