Instrument panel plastic part anti-injection molding air hole exhaust groove mold

Abstract

The utility model discloses an anti-injection molding air hole exhaust groove mold for a plastic part of an instrument panel. The injection molding prevention air hole exhaust groove mold for the plastic part of the instrument panel comprises a lower mold and an upper mold, a cavity is formed in the top of the lower die, a plurality of parallel exhaust grooves are formed in the top of the lower die, and a cleaning mechanism is arranged on the side face of the lower die. The cleaning mechanism comprises a supporting frame fixedly installed on the side face of the lower die, an electric push rod is installed on the supporting frame, a push plate is fixedly installed at the output end of the electric push rod, and a plurality of scraping blocks are fixedly installed at the bottom of the push plate. According to the instrument panel plastic part injection molding prevention air hole exhaust groove mold, the lower mold body and the upper mold body are arranged, the cleaning mechanism comprising the supporting frame, the electric push rod, the push plate and the multiple scraping blocks is arranged on the side face of the lower mold body, when the mold stops working, the exhaust groove can be conveniently cleaned, and compared with a traditional manual cleaning means, the mold has the advantages that the mold is simple in structure and convenient to use. And the cleaning efficiency of the exhaust groove can be effectively improved.

Description

Technical Field

[0001] This utility model relates to the field of mold technology, and in particular to a mold for preventing air vents in injection molding of plastic parts for instrument panels. Background Technology

[0002] Instrument panel plastic parts are usually processed using injection molds. During the injection molding process, the plastic (such as ABS, PC / ABS) releases low molecular weight volatiles at high temperatures. When the melt fronts converge, the gas cannot be discharged (such as at the intersection of ribs). This may cause air entrapment and porosity during injection molding, affecting the appearance and mechanical properties.

[0003] The conventional solution is to add venting channels in the air-trapping areas of the mold (such as the holes on the edge of the instrument panel). However, under long-term operation, the venting channels are easily blocked by raw materials, causing them to fail. Therefore, every certain period of time, it is necessary to manually clean the venting channels one by one with a rag or other tools, which is not convenient and quick.

[0004] Therefore, it is necessary to provide a mold for preventing injection molding air holes and venting grooves in instrument panel plastic parts to solve the above-mentioned technical problems. Utility Model Content

[0005] In view of the above situation and to overcome the defects of the existing technology, this utility model provides a mold for preventing injection molding air holes and venting grooves in instrument panel plastic parts, which can improve the cleaning efficiency of the venting grooves.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0007] A mold for preventing air vents in injection molding of plastic parts for dashboards includes a lower mold and an upper mold. The lower mold has a cavity at its top and multiple parallel air vents at its top. A cleaning mechanism is provided on the side of the lower mold. The cleaning mechanism includes a support frame fixedly installed on the side of the lower mold. An electric push rod is installed on the support frame. A push plate is fixedly installed at the output end of the electric push rod. Multiple scrapers are fixedly installed at the bottom of the push plate, and each scraper corresponds to one of the air vents.

[0008] Preferably, a plug-in plate is fixedly installed at the bottom of the push plate, and a plug-in groove is opened at the top of the scraper, into which the plug-in plate is inserted.

[0009] Preferably, the scraper has a threaded hole on its side that communicates with the insertion slot.

[0010] Preferably, multiple U-shaped temporary storage slots are formed on the scraper block.

[0011] Preferably, multiple guide tubes are installed on the support frame, and guide rods are slidably installed inside the guide tubes, with one end of the guide rods fixedly connected to the push plate.

[0012] Preferably, multiple electric heating rods are installed on the lower mold.

[0013] Preferably, a positioning post is installed on the lower mold, and a positioning groove is opened at the bottom of the upper mold.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] (1) By setting up a lower mold and an upper mold, and setting up a cleaning mechanism including a support frame, an electric push rod, a push plate and multiple scrapers on the side of the lower mold, the exhaust groove can be cleaned conveniently when the mold stops working. Compared with the traditional manual cleaning method, it can effectively improve the cleaning efficiency of the exhaust groove.

[0016] (2) By setting up a plug-in plate and a plug-in slot, the scraper can be easily replaced, reducing maintenance costs;

[0017] (3) By opening multiple temporary storage slots on the scraper, this utility model can help improve the cleaning efficiency of the scraper on the exhaust slot.

[0018] (4) By setting guide tubes and guide rods, this utility model can improve the moving stability of the push plate;

[0019] (5) By installing an electric heating rod on the lower mold, this utility model helps to reduce the viscosity of the melt and accelerate the gas discharge. Attached Figure Description

[0020] Figure 1 A schematic diagram of the mold for preventing injection molding air holes and venting grooves in instrument panel plastic parts provided by this utility model;

[0021] Figure 2 for Figure 1 The diagram shows the structure of the lower mold in the mold for the anti-injection molding vent groove of the instrument panel plastic parts.

[0022] Figure 3 for Figure 1 The diagram shows the structure of the upper mold in the mold for the anti-injection molding vent groove of the instrument panel plastic parts.

[0023] Figure 4 for Figure 1 The diagram shows the structure of the push plate in the mold for the anti-injection molding vent groove of the plastic parts of the instrument panel.

[0024] Figure 5 for Figure 1 The diagram shows the structure of the scraper block in the mold for the anti-injection molding vent groove of the instrument panel plastic parts.

[0025] The corresponding names of the reference numerals in the attached drawings are as follows: 1-lower mold, 2-upper mold, 11-cavity, 12-venting groove, 13-support frame, 14-electric push rod, 15-push plate, 151-scraper block, 1510-insertion groove, 1511-threaded hole, 1512-temporary storage groove, 1513-scraped edge, 152-insertion plate, 153-screw, 16-guide tube, 17-guide rod, 18-electric heating rod, 19-positioning post, 21-injection hole, 22-venting hole. Detailed Implementation

[0026] The present invention will be further described below with reference to the accompanying drawings and embodiments. The embodiments of the present invention include, but are not limited to, the following embodiments.

[0027] Example 1:

[0028] like Figure 1-5As shown, this utility model provides a mold for preventing air vents in instrument panel plastic parts, including a lower mold 1 and an upper mold 2. The lower mold 1 has a cavity 11 at its top, which is adapted to fit the instrument panel plastic part. Multiple parallel venting grooves 12 are formed at the top of the lower mold 1, extending the length of each groove to prevent air accumulation at blind ends. The depth of the venting grooves 12 can be designed from 0.01 to 0.03 mm depending on the instrument panel material; too deep and overflow is likely, while too shallow and insufficient venting is required (for PA material, the depth must be >0.02 mm). The width of the venting grooves 12 can be designed from 5 to 15 mm; wider grooves require a stepped design to match the parting surface. The spacing between the venting grooves can be set from 20 to 50 mm, adjusted according to mold flow analysis results. A cleaning mechanism is provided on the side of the lower mold 1. The cleaning mechanism is used to clean the venting groove 12. The cleaning mechanism includes a support frame 13 fixedly installed on the side of the lower mold 1. An electric push rod 14 is installed on the support frame 13. A push plate 15 is fixedly installed at the output end of the electric push rod 14. Multiple scrapers 151 are fixedly installed at the bottom of the push plate 15. The width of the scraper 151 is adapted to the width of the venting groove 12 (slightly smaller than the width of the venting groove 12). The scraper 151 corresponds one-to-one with the venting groove 12. When using the mold, after multiple uses, it is necessary to clean the blockage in the venting groove 12. At this time, the upper mold 2 and the lower mold 1 are separated. The electric push rod 14 is manually activated, extending its output shaft, which causes the push plate 15 to move to the other side of the lower mold 1. This allows the scraper 151 to enter the venting groove 12, with its bottom contacting the bottom of the venting groove 12 and its side contacting the side wall of the venting groove 12. As the scraper 151 moves, some of the blockage in the venting groove 12 is pushed into the cavity 11, while some is pushed to the other side of the lower mold 1 and falls out. Then, the output shaft of the electric push rod 14 shortens, causing the push plate 15 to move back to its original position. Then, using tools such as an air gun, the debris in the cavity is cleaned out, and the processing of the instrument panel plastic parts can continue. This mold allows for convenient and quick cleaning of the venting groove 12. It is worth noting that if scraper 151 cannot completely clear the blockage in exhaust groove 12 in one round trip, it can be repeated multiple times until the blockage in exhaust groove 12 is cleaned.

[0029] By setting up a lower mold 1 and an upper mold 2, and setting up a cleaning mechanism including a support frame 13, an electric push rod 14, a push plate 15 and multiple scrapers 151 on the side of the lower mold 1, the venting groove 12 can be easily cleaned when the mold stops working. Compared with traditional manual cleaning methods, the cleaning efficiency of the venting groove 12 can be effectively improved.

[0030] Example 2:

[0031] like Figure 4-5As shown, in this embodiment, a plurality of plug-in plates 152 are fixedly installed at the bottom of the push plate 15, and a plug-in groove 1510 is provided on the top of the scraper block 151. The plug-in plates 152 are inserted into the plug-in groove 1510, so that the push plate 15 and the scraper block 151 are plugged in. This allows the scraper block 151 to be easily replaced after it is worn to a certain extent, thereby reducing maintenance costs.

[0032] By setting up the plug-in plate 152 and the plug-in slot 1510, the scraper 151 can be easily replaced, reducing maintenance costs.

[0033] Example 3:

[0034] like Figure 4-5 As shown, a threaded hole 1511 communicating with the insertion slot 1510 is provided on the side of the scraper 151. In use, the screw 153 is screwed into the threaded hole 1511 and pressed tightly onto the insertion plate 152, fixing the insertion plate 152 in the insertion slot 1510 and improving the connection stability between the two. At the same time, this structural design also makes the height of the scraper 151 adjustable, and the adjustment process will not be described in detail here.

[0035] By opening a threaded hole 1511 on the side of the scraper 151, it is easy to install screws 153 to press and fix the plug plate 152.

[0036] Example 4:

[0037] like Figure 5 As shown, in this embodiment, multiple U-shaped temporary storage grooves 1512 are provided on the scraper 151, so that the side edges of the temporary storage grooves 1512 form scraping edges 1513. During the process of the scraper 151 moving in and out of the exhaust groove 12, in addition to the front and rear ends of the scraper 151 cleaning the exhaust groove 12, the scraping edges 1513 on both sides of the temporary storage groove 12 can also scrape off the debris adhering to the inner wall of the exhaust groove 12. The scraped debris is temporarily stored in the temporary storage groove 1512 until the scraper 151 leaves the exhaust groove 12 and the debris in the temporary storage groove 1512 falls off. Through this structure, the scraper 151 can achieve the effect of cleaning the exhaust groove 12 multiple times by moving back and forth once, thereby improving the cleaning efficiency of the scraper 151 on the exhaust groove 12.

[0038] By opening multiple temporary storage slots 1512 on the scraper 151, it is beneficial to improve the cleaning efficiency of the scraper 151 on the exhaust slot 12.

[0039] Example 5:

[0040] like Figure 2As shown, in this embodiment, multiple guide tubes 16 are installed on the support frame 13, and guide rods 17 are slidably installed inside the guide tubes 16. One end of the guide rod 17 is fixedly connected to the push plate 15. When the push plate 15 moves, the guide rod 17 slides along the axial direction of the guide tube 16. This structure can improve the movement stability of the push plate 15.

[0041] By setting the guide tube 16 and the guide rod 17, the movement stability of the push plate 15 can be improved.

[0042] Example 6:

[0043] like Figure 2 As shown, multiple miniature electric heating rods 18 are inserted and installed on the lower mold 1. The electric heating rods 18 are powered by an external power source and their temperature is controlled by a controller. The electric heating rods 18 can locally heat the area where the exhaust groove 12 is located, thereby raising the temperature of the lower mold 1 locally, reducing the viscosity of the melt, and accelerating the gas discharge.

[0044] Installing an electric heating rod 18 on the lower mold 1 helps to reduce the viscosity of the melt and accelerate the gas discharge.

[0045] Example 7:

[0046] like Figure 1 and Figure 3 As shown, in this embodiment, multiple positioning pins 19 are installed on the lower mold 1, and corresponding positioning grooves are formed at the bottom of the upper mold 2. The positioning pins 19 are inserted into the positioning grooves to improve the mold closing accuracy of the lower mold 1 and the upper mold 2. Injection holes 21 and venting holes 22 are formed on the upper mold 2. When the upper mold 2 and the lower mold 1 are closed, the cavity 11 is closed, and injection is performed into the cavity 11 through the injection holes 21 and venting is performed through the venting holes 22. The number and position of the injection holes 21 and venting holes 22 are designed as needed and will not be described in detail here.

[0047] By setting positioning pins 19 and positioning slots, the mold closing accuracy of the lower mold 1 and the upper mold 2 can be improved.

[0048] Working principle: In use, the electric push rod 14 is manually activated, extending its output shaft. This causes the push plate 15 to move to the other side of the lower mold 1, allowing the scraper block 151 to enter the venting groove 12. The bottom of the scraper block 151 contacts the bottom of the venting groove 12, and the side of the scraper block 151 contacts the side wall of the venting groove 12. As the scraper block 151 moves, some of the blockage in the venting groove 12 is pushed into the cavity 11, while some is pushed to the other side of the lower mold 1 and falls out. Then, the output shaft of the electric push rod 14 shortens, causing the push plate 15 to move back to its original position. Finally, a pneumatic gun or other tools are used to clean out the debris from the cavity.

Claims

1. A mold for preventing air vents and venting grooves in plastic parts of an instrument panel, characterized in that, include: Lower mold (1) and upper mold (2); The lower mold (1) has a cavity (11) on its top, and multiple parallel venting grooves (12) are provided on the top of the lower mold (1). A cleaning mechanism is provided on the side of the lower mold (1). The cleaning mechanism includes a support frame (13) fixedly installed on the side of the lower mold (1), an electric push rod (14) is installed on the support frame (13), a push plate (15) is fixedly installed at the output end of the electric push rod (14), and multiple scrapers (151) are fixedly installed at the bottom of the push plate (15), and the scrapers (151) correspond one-to-one with the exhaust groove (12).

2. The mold for the anti-injection molding vent groove (12) of the instrument panel plastic parts according to claim 1, characterized in that, A plug-in plate (152) is fixedly installed at the bottom of the push plate (15), and a plug-in groove (1510) is opened at the top of the scraper (151). The plug-in plate (152) is inserted into the plug-in groove (1510).

3. The mold for the anti-injection molding vent groove (12) of the instrument panel plastic parts according to claim 2, characterized in that, The scraper (151) has a threaded hole (1511) on its side that communicates with the insertion slot (1510).

4. The mold for the anti-injection molding vent groove (12) of the instrument panel plastic parts according to claim 1, characterized in that, Multiple U-shaped temporary storage slots (1512) are provided on the scraper (151).

5. The mold for the anti-injection molding vent groove (12) of the instrument panel plastic parts according to claim 1, characterized in that, Multiple guide tubes (16) are installed on the support frame (13), and guide rods (17) are slidably installed inside the guide tubes (16). One end of the guide rods (17) is fixedly connected to the push plate (15).

6. The mold for the anti-injection molding vent groove (12) of the instrument panel plastic parts according to claim 1, characterized in that, Multiple electric heating rods (18) are installed on the lower mold (1).

7. The mold for the anti-injection molding vent groove (12) of the instrument panel plastic parts according to claim 1, characterized in that, Positioning pins (19) are installed on the lower mold (1), and positioning grooves are opened at the bottom of the upper mold (2).

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