Injection molding processing equipment for automobile exterior trimming parts

Abstract

The invention relates to the technical field of automobile part processing equipment, in particular to automobile exterior trimming part injection molding processing equipment which comprises a charging barrel, an injection molding screw, a hopper, a screening plate, screening holes, a storage plate, a fine screening plate, a coarse screening plate, a limiting groove, a limiting rod, a vibrating wheel, a conical funnel, a discharging opening and a spiral sliding way. A limiting rod at the bottom of a screening plate is matched with a limiting groove vertically formed in the side wall of a hopper, so that when a vibrating wheel at the bottom of the screening plate rotates under the action of a driving motor of the vibrating wheel, the screening plate vibrates up and down in a reciprocating mode under the matching of the limiting rod and the limiting groove; and the plastic raw materials rolling on the surface of the screening plate can be screened more rapidly through the screening plate which vibrates in a reciprocating mode.

Description

Technical Field

[0001] The invention relates to the technical field of automobile parts processing equipment, in particular to an automobile exterior parts injection molding processing equipment. Background Art

[0002] Automobiles are generally composed of four major systems: powertrain, chassis system, body system and electrical equipment. The body system is a spatial structure used to accommodate drivers, carry passengers and load cargo. It mainly includes body shells, doors, exterior trims, interior trims, seats and body accessories. Automobile exterior trims are generally external plastic parts such as front and rear bumpers that are connected to the body by bolts or buckles, which play a decorative and protective role on the vehicle. The production efficiency requirements for automobiles are extremely high. For this reason, most automobile exterior trims are usually processed and molded in large quantities at one time using injection molding technology to produce multiple parts with high precision and strong consistency, thereby reducing production costs and greatly improving production efficiency.

[0003] When injection molding automotive exterior parts, plastic particles must first be injected into the barrel through a hopper. The plastic particles are gradually heated to a molten state in the barrel while being pushed forward by the injection screw. The molten plastic is then injected into the designed exterior mold to form the basic shape of the exterior. After injection molding, the plastic in the mold needs to be cooled and solidified to ensure that the appearance and size of the final product are stable. After cooling and solidification, the product in the mold can be demolded and removed from the mold, and after polishing and quality inspection, it can be put into automotive production.

[0004] During the injection molding process of the above-mentioned automobile exterior trim, it is often inevitable that there will be trapped gas inside the mold. The causes of these gases are complex. In addition to the air that remains in the mold itself, it may also be due to insufficient drying of the plastic raw materials themselves or the moisture attached to the surface of the particles due to humidity in the air. Before being injected into the mold, the water vapor is not completely removed, thereby vaporizing during the injection molding process. In addition, if the particle uniformity of the plastic raw materials in the barrel is insufficient, the melting speed of plastic raw materials of different sizes is different, and some of the plastic raw materials that are already in a molten state will undergo thermal cracking, resulting in excess gas in the mold that mixes with the molten plastic. If these gases are not discharged from the mold in time, it is easy to cause defects such as flow marks and splashes on the surface of the injection molded plastic parts, bubbles are generated inside the plastic parts, and in severe cases, it will lead to dissatisfaction of the filling. The residual gas may even cause obvious defects such as burns and voids on the plastic parts, which not only affects the aesthetics of the product surface, but also weakens the strength of the plastic parts, making it impossible to meet the expected assembly requirements, thereby reducing the production yield of automobile exterior trims and slowing down the production efficiency of automobiles.

[0005] In view of this, in order to overcome the above technical problems, the present invention proposes an injection molding processing equipment for automobile exterior parts. Summary of the invention

[0006] In order to make up for the deficiencies of the prior art, the technical solution adopted by the present invention to solve the technical problem is: an automobile exterior parts injection molding processing equipment described in the present invention comprises:

[0007] frame;

[0008] A driving device, which is fixedly connected to one end of the frame and is used to provide power for injection work;

[0009] A molding device, which is installed at the other end of the frame and is used to process and mold the raw materials injected therein;

[0010] Also includes:

[0011] A barrel, in which an injection screw connected to a driving device is rotatably installed, and the barrel is used to melt the plastic raw material into a molten state and inject it into the molding device;

[0012] A hopper is fixedly connected to one end of the barrel close to the driving device. The hopper is installed above the barrel and is connected to the barrel. The hopper includes a screening mechanism and a drying mechanism. The screening mechanism is located at the upper end of the drying mechanism. The hopper is used to inject the uniform particles after screening and drying into the barrel.

[0013] Preferably, the screening mechanism comprises:

[0014] A feed inlet, the feed inlet being opened at one end of the top of the hopper;

[0015] A screening plate, which is obliquely installed inside the hopper, and has screening holes evenly formed thereon, and is used to screen out a portion of particles with uniform size from the plastic raw material injected into the hopper from the feed port;

[0016] A material storage plate is fixedly connected to the side wall of the hopper and is used to store the uneven plastic raw materials screened out by the screening plate.

[0017] Preferably, the sieve plate consists of a fine sieve plate close to the feed inlet and a coarse sieve plate far from the feed inlet, the aperture of the sieve holes on the fine sieve plate is smaller than the standard aperture, and the aperture of the sieve holes on the coarse sieve plate is larger than the standard aperture.

[0018] Preferably, the length of the coarse screen plate is greater than that of the fine screen plate, and the inclination of the coarse screen plate is greater than that of the fine screen plate.

[0019] Preferably, the screen plate is slidably matched with the side wall of the hopper, and the bottom and top side walls of the screen plate are evenly fixedly connected to a limit rod that extends into the limit groove of the side wall of the hopper, and the limit groove is a vertical long groove, and the limit groove and the limit rod are gap-matched; a vibration wheel is also rotatably connected to the side wall of the hopper at the bottom of the screen plate, and during the rotation of the vibration wheel, the screen plate is in an up and down vibration state under the cooperation of the limit rod and the limit groove.

[0020] Preferably, the material storage plate is an "L"-shaped plate, and the vertical portion of the material storage plate is slidably connected to the screening plate.

[0021] Preferably, the horizontal section of the material storage plate is inclined downward, and a fine particle opening is provided at the junction of the end of the horizontal section of the material storage plate and the side wall of the hopper, and the fine particle opening is connected to an exhaust fan that extracts the screened waste from the material storage plate.

[0022] Preferably, a coarse particle opening is provided at the upper end of the hopper side wall connected to the coarse screen plate, the coarse particle opening is inclined downward, and a wind separator for blowing air horizontally toward the coarse particle opening is fixedly connected at a horizontal relative position of the coarse particle opening.

[0023] Preferably, the drying mechanism includes a conical funnel and a discharge port located at the bottom of the conical funnel, the conical funnel is fixedly connected to the drying mechanism below the hopper, a spiral slide is also fixedly connected to the inner wall of the conical funnel, and an electric heating wire is fixedly connected to the spiral slide for heating and drying the plastic raw material passing through the spiral slide.

[0024] Preferably, the spiral slide heating wire is connected to a thermal bimetallic strip.

[0025] The beneficial effects of the present invention are as follows:

[0026] 1. Through the two-layer sieve plate design of the screening plate, all large and small particles in the plastic raw materials that do not meet the standard raw material size are screened out, and only the plastic raw materials that meet the standard size are allowed to enter the barrel through the hopper. When the driving device on the frame is started, these plastic raw materials are melted under the action of the injection molding screw and the heating device on the barrel. The time required for plastic particles of the same size to enter the molten state is also roughly the same, thereby avoiding the influence of additional gas generated by thermal decomposition of raw materials in the melting stage due to the difference in raw material particle size on the molding device during the injection molding process, enhancing the strength and quality of the automotive exterior parts obtained after injection molding, and improving the product yield and safety.

[0027] 2. The wind speed of the air separator is adjusted according to the mass of the standard particles, ensuring that the standard plastic raw materials thrown up due to the vibration of the coarse screen plate will be blown away from the coarse particle opening by the air separator when passing through the coarse particle opening, so that the standard raw materials will not be mistakenly screened out of the hopper, achieving the technical effect of screening out large particles on the coarse screen plate and ensuring the screening accuracy of the screening mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The present invention will be further described below in conjunction with the accompanying drawings.

[0029] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0030] Figure 2 It is a partial structural cross-sectional view of the present invention;

[0031] Figure 3 is a three-dimensional structural cross-sectional view of the hopper of the present invention;

[0032] Figure 4 yes Figure 3 Enlarged view of point A in .

[0033] In the figure: 1. frame; 2. driving device; 3. molding device; 4. barrel; 5. injection screw; 6. hopper; 7. screening mechanism; 8. drying mechanism; 9. feed port; 10. screening plate; 11. screening holes; 12. storage plate; 13. fine screen plate; 14. coarse screen plate; 15. limiting groove; 16. limiting rod; 17. vibrating wheel; 18. fine particle port; 19. coarse particle port; 20. air separator; 21. conical funnel; 22. discharge port; 23. spiral slide. DETAILED DESCRIPTION

[0034] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention will be further explained below in conjunction with the accompanying drawings and specific implementation methods.

[0035] like Figures 1 to 4 As shown, the present invention provides an automobile exterior parts injection molding processing equipment, comprising:

[0036] Rack 1;

[0037] A driving device 2, which is fixedly connected to one end of the frame 1 and is used to provide power for injection work;

[0038] A molding device 3, which is installed at the other end of the frame 1 and is used to process and mold the raw materials injected therein;

[0039] Also includes:

[0040] A barrel 4, in which an injection screw 5 connected to the driving device 2 is rotatably installed, and the barrel 4 is used to melt the plastic raw material into a molten state and inject it into the molding device 3;

[0041] The hopper 6 is fixedly connected to one end of the barrel 4 close to the driving device 2. The hopper 6 is installed above the barrel 4 and is connected to the barrel 4. The hopper 6 includes a screening mechanism 7 and a drying mechanism 8. The screening mechanism 7 is located at the upper end of the drying mechanism 8. The hopper 6 is used to inject the uniform particles after screening and drying into the barrel 4.

[0042] As an embodiment of the present invention, the screening mechanism 7 comprises:

[0043] A feed port 9, the feed port 9 is opened at one end of the top of the hopper 6;

[0044] A screening plate 10, the screening plate 10 is obliquely installed inside the hopper 6, the screening plate 10 is evenly provided with screening holes 11, and the screening plate 10 is used to screen out a portion with uniform particle size from the plastic raw material injected into the hopper 6 from the feed inlet 9;

[0045] A material storage plate 12 is fixedly connected to the side wall of the hopper 6 , and is used to store the uneven plastic raw materials screened out by the screening plate 10 .

[0046] As an embodiment of the present invention, the screening plate 10 is composed of a fine screening plate 13 close to the feed port 9 and a coarse screening plate 14 far away from the feed port 9, the aperture of the screening holes 11 on the fine screening plate 13 is smaller than the standard aperture, and the aperture of the screening holes 11 on the coarse screening plate 14 is larger than the standard aperture.

[0047] As an embodiment of the present invention, the length of the coarse screen plate 14 is greater than that of the fine screen plate 13 , and the inclination of the coarse screen plate 14 is greater than that of the fine screen plate 13 .

[0048] As an embodiment of the present invention, the material storage plate 12 is an "L"-shaped plate, the horizontal section of the material storage plate 12 is tilted downward, a fine particle opening 18 is provided at the end of the horizontal section of the material storage plate 12 where it connects with the side wall of the hopper 6, and the fine particle opening 18 is connected to an exhaust fan that extracts the screened waste from the material storage plate 12.

[0049] When performing the injection molding of automobile exterior parts, first, pour the plastic raw material for injection molding into the hopper 6 from the feed port 9 above the hopper 6, and the plastic raw material particles entering the hopper 6 along the feed port 9 first fall onto the screening plate 10 obliquely installed on the side wall of the hopper 6 just below the feed port 9. Since the particles in the plastic raw material are of different sizes, there are both plastic raw materials larger than the standard size and plastic raw materials smaller than the standard size, and there are also some dust, debris, etc., for this reason, the screening plate 10 is divided into a fine screening plate 13 close to the feed port 9 and with a longer length, and a coarse screening plate 14 relatively far from the feed port 9 and with a shorter length, wherein the aperture of the screening hole 11 on the fine screening plate 13 is smaller than the diameter of the standard plastic raw material, so that a large amount of unscreened plastic raw materials are not screened. When the plastic raw materials fall onto the fine screen plate 13 from the feed inlet 9, the plastic particles smaller than the standard size and the dust and debris mixed therein can fall from the screening holes 11 of the fine screen plate 13 during the rolling process of the fine screen plate 13 and fall onto the storage plate 12. The small plastic particles roll along the downwardly inclined storage plate 12 to the fine particle opening 18 and roll out of the hopper 6 from the fine particle opening 18, while the dust and debris that will not roll will also be blown out from the fine particle opening 18 by the wind force of the exhaust fan, thereby ensuring that the space on the storage plate 12 under the fine screen plate 13 is always sufficient and will not be filled up and lose the screening function; the longer fine screen plate 13 provides a sufficiently long screening time for a large amount of plastic raw materials, thereby ensuring that the plastic raw materials that have just fallen from the feed inlet 9 Small particles of raw materials and dust that do not meet the standards can be successfully screened out at the fine screen plate 13, thereby avoiding the influence of the smaller part of these injection molding raw materials that do not meet the standards on the injection molding process, reducing the amount of gas generated when the plastic raw materials are melted in the barrel 4, thereby reducing the possibility of defects on the surface of the injection molded product; after being screened by the fine screen plate 13, the plastic raw materials arrive at the fine screen plate 13 where the inclination is reduced to compensate for the shorter length. At this time, the plastic raw materials with larger particle sizes in the plastic raw materials cannot fall through the screening holes 11 of the coarse screen plate 14, and are thus intercepted on the coarse screen plate 14, while the raw material particles that meet the standard size can fall through the screening holes 11 of the coarse screen plate 14, thereby leaving the screening mechanism 7 and entering the drying process. Mechanism 8; through the two-layer sieve plate design of the sieve plate 10, all large particles and small particles that do not meet the standard raw material size in the plastic raw material are screened out, and only the plastic raw material that meets the standard size is allowed to enter the barrel 4 through the hopper 6, so that when the driving device 2 on the frame 1 is started, these plastic raw materials are melted under the action of the injection molding screw 5 and the heating device on the barrel 4, the time required for plastic particles of the same size to enter the molten state is also roughly the same, thereby avoiding the influence of additional gas generated by thermal decomposition of the raw material in the melting stage due to the difference in raw material particle size on the molding device 3 during the injection molding process, thereby enhancing the strength and quality of the automotive exterior parts obtained after injection molding, and improving the product yield and safety.

[0050] As an embodiment of the present invention, the screening plate 10 is slidably matched with the side wall of the hopper 6, and the bottom and top side walls of the screening plate 10 are evenly fixedly connected to a limiting rod 16 extending into a limiting groove 15 on the side wall of the hopper 6, and the limiting groove 15 is a vertical long groove, and the limiting groove 15 and the limiting rod 16 are clearance-matched; a vibration wheel 17 is also rotatably connected to the side wall of the hopper 6 at the bottom of the screening plate 10, and during the rotation of the vibration wheel 17, the screening plate 10 is in an up and down vibration state under the cooperation of the limiting rod 16 and the limiting groove 15.

[0051] As an embodiment of the present invention, the material storage plate 12 is an “L”-shaped plate, and the vertical portion of the material storage plate 12 is slidably connected to the screening plate 10 .

[0052] As an embodiment of the present invention, a coarse particle opening 19 is provided at the upper end of the side wall of the hopper 6 connected to the coarse screen plate 14. The coarse particle opening 19 is inclined downward, and a wind separator 20 for blowing air horizontally toward the coarse particle opening 19 is fixedly connected at a horizontal relative position of the coarse particle opening 19.

[0053] When working, the limiting rod 16 at the bottom of the screening plate 10 is matched with the limiting groove 15 vertically opened on the side wall of the hopper 6, so that when the vibration wheel 17 at the bottom of the screening plate 10 rotates under the action of its driving motor, the screening plate 10 performs reciprocating vibration up and down under the cooperation of the limiting rod 16 and the limiting groove 15. The reciprocating vibration of the screening plate 10 makes the screening of the plastic raw materials rolling on its surface faster, and the dust and debris originally attached to the gap between the screening holes 11 and the screening holes 11 on the fine screen plate 13 will also fall into the screening holes 11 and be screened under the continuous vibration. The dust and debris are separated out and will not always exist on the surface of the fine screen plate 13, thereby avoiding the possibility that these dust and debris block other plastic raw materials or adhere to other plastic raw materials and enter the drying mechanism 8, thereby improving the screening efficiency of the fine screen plate 13; since the length of the coarse screen plate itself is relatively small, even if the inclination angle is reduced, the available screening length is much smaller than the fine screen plate 13, and the distribution range of the screening holes 11 is limited. The screening holes 11 cannot be opened at the edge of the coarse screen plate 14 where the particle size is less than the standard particle size. If the standard particles roll to the edge when rolling along the coarse screen plate 14, the part The standard particles cannot be screened out from the screening holes 11 by the coarse screen plate 14, and the coarse particles are always accumulated on the coarse screen plate 14, which will affect the screening effect of the coarse screen plate 14 over time. The reciprocating vibrating coarse screen plate 14 allows the standard particles at the edge to be screened out to the drying mechanism 8 by the screening holes 11 of the coarse screen plate 14 during multiple vibrations, thereby improving the screening accuracy. The coarse particle opening 19 opened on the side wall of the hopper 6 above the coarse screen plate 14 also allows the large particles accumulated on the coarse screen plate 14 to be thrown out during multiple vibrations of the inclined coarse screen plate 14. The standard plastic raw materials are ensured to be thrown up by the vibration of the coarse screen plate 14 and blown away from the coarse particle opening 19 by the wind separator 20 when passing through the coarse particle opening 19, so that the standard raw materials will not be mistakenly screened out of the hopper 6, which has the technical effect of screening out the large particles on the coarse screen plate 14 and ensuring the screening accuracy of the screening mechanism 7.

[0054] As an embodiment of the present invention, the drying mechanism 8 includes a conical funnel 21 and a discharge port 22 located at the bottom of the conical funnel 21. The conical funnel 21 is fixedly connected to the drying mechanism 8 below the hopper 6. A spiral slide 23 is also fixedly connected to the inner wall of the conical funnel 21. The spiral slide 23 is fixedly connected to an electric heating wire for heating and drying the plastic raw material passing through the spiral slide 23.

[0055] As an embodiment of the present invention, the heating wire of the spiral slideway 23 is connected to a thermal bimetallic strip.

[0056] During operation, when the standard particles are screened out by the screening mechanism 7 and fall into the conical funnel 21 of the drying mechanism 8, the electric heating wire of the spiral slide 23 fixedly connected to the conical funnel 21 has heated the spiral slide 23. Therefore, when the standard particles roll down in the conical funnel 21 along the spiral slide 23 in a sufficiently long sliding stroke, the moisture and water vapor on the surface of the standard particles can be converted into water vapor by the high temperature conducted by the spiral slide 23 and removed from the surface of the standard particles, and rise along the screening holes 11 of the coarse screen plate 14, and finally be screened by the fine screen. The exhaust fan of the coarse particle port 19 under the plate 13 draws out from the hopper 6; the electric heating wire on the spiral slide 23 is also connected to a hot bimetallic strip. The hot bimetallic strip deforms and stops heating after exceeding the set temperature range, which makes the heating temperature of the spiral slide 23 by the heating wire maintained within a reasonable range, thereby ensuring that the standard particles are not overheated in the spiral slide 23, thereby avoiding the possibility of accidents when the standard particles enter the barrel 4 along the discharge port 22 after being heated and are subsequently melted in the barrel 4.

[0057] The above shows and describes the basic principles, main features and significant advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above specific embodiments. Without departing from the spirit and scope of the present invention, the present invention may also be modified and improved to adapt to different usage environments and customer needs. These modifications and improvements fall within the scope of protection of the present invention. The scope of protection claimed by the present invention is defined by the attached claims and their equivalents.

Claims

1. An injection molding processing equipment for automobile exterior parts, comprising: Rack(1); A driving device (2), the driving device (2) being fixedly connected to one end of the frame (1) and used to provide power for injection work; A molding device (3), the molding device (3) being mounted at the other end of the frame (1) and being used to process and mold the raw material injected therein; It is characterized by further comprising: A barrel (4), wherein an injection screw (5) connected to the drive device (2) is rotatably mounted in the barrel (4), and the barrel (4) is used to melt the plastic raw material into a molten state and inject it into the molding device (3); A hopper (6), the hopper (6) being fixedly connected to one end of the barrel (4) close to the driving device (2), the hopper (6) being installed above the barrel (4) and being connected to the barrel (4), the hopper (6) comprising a screening mechanism (7) and a drying mechanism (8), the screening mechanism (7) being located at the upper end of the drying mechanism (8), and the hopper (6) being used to inject the uniform particles after screening and drying into the barrel (4).

2. The automotive exterior parts injection molding equipment according to claim 1, characterized in that: The screening mechanism (7) comprises: A feed inlet (9), the feed inlet (9) being opened at one end of the top of the hopper (6); A screening plate (10), the screening plate (10) being obliquely mounted inside the hopper (6), the screening plate (10) being evenly provided with screening holes (11), the screening plate (10) being used to screen out a portion of particles having a uniform particle size from the plastic raw material injected into the hopper (6) from the feed inlet (9); A material storage plate (12), the material storage plate (12) being fixedly connected to a side wall of the hopper (6), the material storage plate (12) being used to store the non-uniform plastic raw material screened out by the screening plate (10).

3. The automobile exterior parts injection molding equipment according to claim 2, characterized in that: The screening plate (10) is composed of a fine screening plate (13) close to the feed inlet (9) and a coarse screening plate (14) far from the feed inlet (9); the aperture of the screening holes (11) on the fine screening plate (13) is smaller than the standard aperture, and the aperture of the screening holes (11) on the coarse screening plate (14) is larger than the standard aperture.

4. The automobile exterior parts injection molding equipment according to claim 3, characterized in that: The length of the coarse screen plate (14) is greater than the length of the fine screen plate (13), and the inclination of the coarse screen plate (14) is greater than the inclination of the fine screen plate (13).

5. The automobile exterior parts injection molding equipment according to claim 2, characterized in that: The screening plate (10) is slidably engaged with the side wall of the hopper (6); the bottom and top side walls of the screening plate (10) are evenly and fixedly connected to a limit rod (16) extending into a limit groove (15) on the side wall of the hopper (6); the limit groove (15) is a vertical long groove; the limit groove (15) and the limit rod (16) are clearance-matched; a vibration wheel (17) is also rotatably connected to the side wall of the hopper (6) at the bottom of the screening plate (10); during the rotation of the vibration wheel (17), the screening plate (10) is in an up and down vibration state under the cooperation of the limit rod (16) and the limit groove (15).

6. The automobile exterior parts injection molding equipment according to claim 5, characterized in that: The material storage plate (12) is an "L"-shaped plate, and a vertical portion of the material storage plate (12) is slidably connected to the screening plate (10).

7. The automobile exterior parts injection molding equipment according to claim 4 or 6, characterized in that: The horizontal section of the material storage plate (12) is in a downwardly inclined state, and a fine particle opening (18) is provided at the junction of the end of the horizontal section of the material storage plate (12) and the side wall of the hopper (6). The fine particle opening (18) is connected to an exhaust fan for extracting screened waste from the material storage plate (12).

8. The automobile exterior parts injection molding equipment according to claim 7, characterized in that: A coarse particle opening (19) is provided at the upper end of a side wall of the hopper (6) connected to the coarse screen plate (14). The coarse particle opening (19) is inclined downward, and a wind separator (20) for blowing air horizontally toward the coarse particle opening (19) is fixedly connected at a horizontal relative position of the coarse particle opening (19).

9. The automobile exterior parts injection molding equipment according to claim 1, characterized in that: The drying mechanism (8) comprises a conical funnel (21) and a discharge port (22) located at the bottom of the conical funnel (21). The conical funnel (21) is fixedly connected to the bottom of the drying mechanism (8) of the hopper (6). A spiral slideway (23) is also fixedly connected to the inner wall of the conical funnel (21). A heating wire is fixedly connected to the spiral slideway (23) for heating and drying the plastic raw material passing through the spiral slideway (23).

10. The automobile exterior parts injection molding equipment according to claim 9, characterized in that: The spiral slideway (23) is connected to the heating wire with a thermal bimetallic strip.

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