Automobile fender injection molding device and injection molding process thereof

Abstract

The invention discloses an automobile mudguard injection molding device and an injection molding process thereof, relates to the technical field of automobile mudguard injection molding, and aims to solve the problems that an existing automobile mudguard injection molding device is not provided with a vacuumizing structure, and during injection molding, hot-melt plastic easily generates bubbles in the cooling process, so that the mudguard injection molding effect is poor. According to the scheme, the injection molding device comprises a base, an injection molding box is arranged at the top of the base, a lower injection molding plate is arranged in the injection molding box, a telescopic rod is arranged at the top of the base, a lifting plate is arranged at the top of the telescopic rod, an upper injection molding plate is arranged at the bottom of the lifting plate, material taking mechanisms are arranged on the two sides in the lower injection molding plate, and supporting blocks are arranged on the two sides of the base; a heat dissipation air box is arranged at the top of the supporting block, and a vacuumizing mechanism is arranged in the upper injection molding plate. The fender cooling device is novel in structure, hot-melt plastic can be subjected to air exhaust vacuum treatment, the fender can be jacked up after being cooled and formed, and cooling treatment is further conducted on the fender.

Description

Technical Field

[0001] The invention relates to the technical field of automobile fender injection molding, in particular to an automobile fender injection molding device and an injection molding process thereof. Background Art

[0002] The automobile fender is a plate structure installed behind the outer frame of the wheel. It is usually made of high-quality rubber material, and engineering plastics are also used. The injection molding process is a manufacturing technology that uses an injection molding machine to inject molten plastic material into a closed mold, and forms a plastic product of the desired shape and size after cooling. Most traditional automobile fender injection molding devices do not have a vacuum structure. During injection molding, hot-melt plastic is prone to produce bubbles during the cooling process, which will lead to poor fender injection molding effects and affect product quality. A automobile fender injection molding device and its injection molding process are now proposed, which can perform vacuum treatment on hot-melt plastic during injection molding, and can automatically lift up the fender after the fender is cooled and formed, and the fender is further cooled by the heat dissipation bellows to prevent workers from getting scalded when taking materials. Summary of the invention

[0003] The invention provides an automobile fender injection molding device and an injection molding process thereof, which solve the existing problems.

[0004] In order to achieve the above object, the present invention adopts the following technical solutions:

[0005] A car fender injection molding device comprises a base, an injection molding box body is arranged on the top of the base, a lower injection molding plate is arranged inside the injection molding box, a lower injection molding groove is opened on the top of the lower injection molding plate, a telescopic rod is arranged on the top of the base, a lifting plate is arranged on the top of the telescopic rod, an upper injection molding plate is arranged at the bottom of the lifting plate, and an upper injection molding groove is opened at the bottom of the upper injection molding plate, material taking mechanisms are arranged on both sides of the lower injection molding plate, support blocks are arranged on both sides of the base, a heat dissipation bellows is arranged on the top of the support block, and a vacuum extraction mechanism is arranged inside the upper injection molding plate.

[0006] Preferably, the material taking mechanism includes a top plate, and the top plate is symmetrically installed on both sides of the top of the lower injection molding plate, and sinking grooves are opened on both sides of the top of the lower injection molding plate, and the shape and size of the sinking grooves match the top plate, and a lifting motor is arranged at the bottom of the top plate.

[0007] Preferably, the top of the top plate is flush with the top of the lower injection molding plate, and the lifting motors are symmetrically arranged on both sides of the bottom of the top plate, the lifting motors are arranged inside the lower injection molding plate, and the top plate moves along the lifting motors.

[0008] Preferably, the vacuum mechanism includes an exhaust hole, and the exhaust hole is opened at the bottom of the upper injection molding plate, one end of the exhaust hole is connected to the exhaust channel, and the exhaust channel is opened inside the upper injection molding plate, the exhaust channel is a "human" shaped structure, and one end of the top of the exhaust channel is connected to an exhaust duct, the other end of the exhaust duct is provided with a vacuum pump, and a vacuum valve is sleeved on the outside of the exhaust duct, and a control knob is provided on the top of the vacuum valve.

[0009] Preferably, a plurality of injection holes are opened on the top of the lower injection molding plate, and one end of the injection hole is connected to an injection pipe, injection branches are arranged on both sides of the injection pipe, and the ends of the injection branches correspond to the injection holes respectively.

[0010] Preferably, the heat dissipation bellows are symmetrically arranged on both sides of the base, and the position of the heat dissipation bellows corresponds to the position between the lower injection molding groove and the upper injection molding groove.

[0011] Preferably, the shape and size of the injection molding box body matches the upper injection molding plate, and a sealing groove is provided on the top of the lower injection molding plate, and a sealing strip is provided on the bottom of the upper injection molding plate, and the shape and size of the sealing groove matches the sealing strip.

[0012] Preferably, the telescopic rod is installed at the corner between the top of the base and the bottom of the lifting plate, and a telescopic cylinder is provided on the top of the lifting plate, one end of the telescopic cylinder corresponds to the telescopic rod, and the lifting plate moves up and down along the telescopic rod.

[0013] Preferably, the lower injection molding plate and the upper injection molding plate are both made of a high temperature resistant metal material, and the shape and size of the lower injection molding groove match those of the upper injection molding groove.

[0014] An injection molding process of an automobile fender injection molding device comprises the following steps:

[0015] S1. After the plastic particles required for injection molding are heated and melted by a relevant machine, they are injected through the injection pipe connected to the bottom of the base, and then flowed through the injection branch pipe at the top of the injection pipe and evenly injected into the lower injection tank;

[0016] S2, driving the telescopic cylinder to control the telescopic rod, the lifting plate follows the telescopic rod to move up and down, the movement of the lifting plate drives the upper injection molding plate to move, the upper injection molding plate and the lower injection molding plate are pressed together, and the upper injection molding groove and the lower injection molding groove form the required injection fender mold structure;

[0017] S3, injecting hot-melt plastic particles from the injection hole into the upper injection molding groove and the lower injection molding groove through the injection branch pipe, so that the hot-melt plastic particles form the structure of the fender;

[0018] S4. When the hot-melt plastic particles begin to be molded, the vacuum pump extracts the air inside the upper injection molding groove and the lower injection molding groove to prevent the hot-melt plastic particles from generating bubbles during the molding process, which affects the production quality of the fender;

[0019] S5. After the fender is formed by cooling the hot-melt plastic particles, the lifting motor controls the top plate to rise, and the formed fender is lifted up. The heat dissipation bellows further dissipate the heat of the formed fender, so that the fender is completely cooled.

[0020] The beneficial effects of the present invention are:

[0021] 1. The upper injection molding plate and the lower injection molding plate are engaged with each other through the sealing groove and the sealing strip to achieve the purpose of sealing, so as to prevent the leakage of hot melt plastic particles during the injection molding process;

[0022] 2. The hot-melt plastic particles enter the injection branch through the injection pipe, and are injected into the space between the upper injection groove and the lower injection groove from the injection hole at the end of the injection branch. The method of injecting the hot-melt plastic particles from the bottom to the top can effectively reduce the air inside the hot-melt plastic particles;

[0023] 3. The control knob is used to control the vacuum valve, which is used to control the vacuum pump's exhaust progress, and to extract the air between the upper injection molding plate and the lower injection molding plate through the exhaust hole;

[0024] 4. The fender still has a high temperature after injection molding. The top plate is driven by the lifting motor to lift the injection-molded fender to avoid manual removal and effectively prevent burns;

[0025] 5. The cooling bellows are used to further dissipate heat from the hot-melt formed fenders, allowing the fenders to be completely cooled and formed.

[0026] In summary, the structure of the present invention can better solve the problem that most traditional automobile fender injection molding devices do not have a vacuum structure, and during injection molding, hot-melt plastic is prone to generate bubbles during the cooling process, which will lead to poor fender injection molding effect and affect product quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a structural schematic diagram of the automobile fender injection molding device of the present invention;

[0028] Figure 2 It is a structural cross-sectional view of the automobile fender injection molding device of the present invention;

[0029] Figure 3 It is a structural cross-sectional view of the automobile fender injection molding device of the present invention from another angle;

[0030] Figure 4 It is a schematic diagram of the structure of the lower injection molding plate of the present invention;

[0031] Figure 5 It is a schematic diagram of the lifting plate structure of the present invention;

[0032] Figure 6 It is a schematic diagram of the structure of the upper injection molding plate of the present invention;

[0033] Figure 7 It is a schematic diagram of the injection tube structure of the present invention.

[0034] Numbers in the figure: 1. Base; 2. Injection molding box; 3. Lower injection molding plate; 4. Sealing groove; 5. Lower injection molding groove; 6. Lifting plate; 7. Upper injection molding plate; 8. Upper injection molding groove; 9. Sealing strip; 10. Support block; 11. Heat dissipation bellows; 12. Top plate; 13. Lifting motor; 14. Telescopic rod; 15. Telescopic cylinder; 16. Injection hole; 17. Injection pipe; 18. Exhaust channel; 19. Exhaust duct; 20. Vacuum valve; 21. Control knob; 22. Vacuum pump; 23. Injection branch pipe; 24. Exhaust hole; 25. Sinking groove. DETAILED DESCRIPTION

[0035] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0036] Reference Figure 1-Figure 7 A car fender injection molding device comprises a base 1, an injection molding box 2 is arranged on the top of the base 1, and a lower injection molding plate 3 is arranged inside the injection molding box 2, a lower injection molding groove 5 is opened on the top of the lower injection molding plate 3, and a telescopic rod 14 is arranged on the top of the base 1, and a lifting plate 6 is arranged on the top of the telescopic rod 14, an upper injection molding plate 7 is arranged at the bottom of the lifting plate 6, and an upper injection molding groove 8 is opened at the bottom of the upper injection molding plate 7, the upper injection molding groove 8 and the lower injection molding groove 5 constitute the structure of the fender, and material taking mechanisms are arranged on both sides of the lower injection molding plate 3, and support blocks 10 are arranged on both sides of the base 1, and a heat dissipation bellows 11 is arranged on the top of the support block 10, the heat dissipation bellows 11 is used to cool the injection-molded fender, and a vacuum mechanism is arranged inside the upper injection molding plate 7.

[0037] Reference Figure 4The material-retrieving mechanism includes a top plate 12, and the top plate 12 is symmetrically installed on both sides of the top of the lower injection molding plate 3. Sinking grooves 25 are opened on both sides of the top of the lower injection molding plate 3, and the shape and size of the sinking grooves 25 match the top plate 12. A lifting motor 13 is arranged at the bottom of the top plate 12. The top plate 12 is driven by the lifting motor 13 to achieve the purpose of lifting. The top of the top plate 12 is flush with the top of the lower injection molding plate 3, and the lifting motors 13 are symmetrically arranged on both sides of the bottom of the top plate 12. The lifting motor 13 is arranged inside the lower injection molding plate 3, and the top plate 12 moves along the lifting motor 13. The fender still has a high temperature after injection molding. The top plate 12 is used to lift the injection-molded fender to avoid manual picking, which effectively prevents burns.

[0038] Reference Figure 2 , Figure 5 and Figure 6 The vacuum mechanism includes an exhaust hole 24, and the exhaust hole 24 is opened at the bottom of the upper injection molding plate 7. The air between the upper injection molding plate 7 and the lower injection molding plate 3 is exhausted through the exhaust hole 24. One end of the exhaust hole 24 is connected to the exhaust channel 18, and the exhaust channel 18 is opened inside the upper injection molding plate 7. The exhaust channel 18 is a "human" shaped structure, and one end of the top of the exhaust channel 18 is connected to an exhaust duct 19, and the other end of the exhaust duct 19 is provided with a vacuum pump 22. The exhaust duct 19 is used to guide the exhausted air, and a vacuum valve 20 is sleeved on the outside of the exhaust duct 19. A control knob 21 is provided on the top of the vacuum valve 20. The control knob 21 is used to control the vacuum valve 20, and the vacuum valve 20 is used to control the exhaust progress of the vacuum pump 22.

[0039] Reference Figure 7 A plurality of injection holes 16 are provided on the top of the lower injection molding plate 3, and an injection pipe 17 is connected to one end of the injection hole 16. Injection branches 23 are provided on both sides of the injection pipe 17, and the ends of the injection branches 23 correspond to the injection holes 16 respectively. The hot-melt plastic particles enter the injection branches 23 through the injection pipe 17, and are injected into the space between the upper injection molding groove 8 and the lower injection molding groove 5 from the injection holes 16 at the ends of the injection branches 23.

[0040] Reference Figure 1 and Figure 4 The heat dissipation bellows 11 are symmetrically arranged on both sides of the base 1, and the position of the heat dissipation bellows 11 corresponds to the position between the lower injection molding groove 5 and the upper injection molding groove 8. The heat dissipation bellows 11 are used for further heat dissipation treatment of the hot-melt formed fender so that the fender can be completely cooled and formed.

[0041] Reference Figure 4-Figure 6The shape and size of the injection molding box 2 match the upper injection molding plate 7, and a sealing groove 4 is provided on the top of the lower injection molding plate 3, and a sealing strip 9 is provided at the bottom of the upper injection molding plate 7, and the shape and size of the sealing groove 4 match the sealing strip 9. The upper injection molding plate 7 and the lower injection molding plate 3 are mutually engaged with the sealing groove 4 and the sealing strip 9 to achieve the purpose of sealing, so as to prevent the hot-melt plastic particles from leaking during the injection molding process. The telescopic rod 14 is installed at the corner between the top of the base 1 and the bottom of the lifting plate 6, and a telescopic cylinder 15 is provided on the top of the lifting plate 6. The telescopic cylinder 15 is used to drive the telescopic rod 14, and one end of the telescopic cylinder 15 corresponds to the telescopic rod 14, and the lifting plate 6 moves up and down along the telescopic rod 14. The lower injection molding plate 3 and the upper injection molding plate 7 are both made of a high-temperature resistant metal material, and the shape and size of the lower injection molding groove 5 match the upper injection molding groove 8.

[0042] An automobile fender injection molding process comprises the following steps:

[0043] S1. After the plastic particles required for injection molding are heated and melted by a relevant machine, they are injected through the injection pipe 17 connected to the bottom of the base 1, and then flowed through the injection branch pipe 23 at the top of the injection pipe 17 and evenly injected into the lower injection tank 5;

[0044] S2, drive the telescopic cylinder 15 to control the telescopic rod 14, the lifting plate 6 follows the telescopic rod 14 to move up and down, and the upper injection molding plate 7 is driven to move by the movement of the lifting plate 6, and the upper injection molding plate 7 and the lower injection molding plate 3 are pressed together, and the upper injection molding groove 8 and the lower injection molding groove 5 form the required injection fender mold structure;

[0045] S3, injecting hot-melt plastic particles from the injection hole 16 into the upper injection groove 8 and the lower injection groove 5 through the injection branch pipe 23, so that the hot-melt plastic particles form the structure of the fender;

[0046] S4, the vacuum pump 22 extracts the air inside the upper injection molding groove 8 and the lower injection molding groove 5 when the hot-melt plastic particles begin to be molded, so as to prevent the hot-melt plastic particles from generating bubbles during the molding process, thereby affecting the production quality of the fender;

[0047] S5. After the fender is formed by cooling the hot-melt plastic particles, the lifting motor 13 controls the top plate 12 to lift up the formed fender, and the heat dissipation bellows 11 further dissipates heat on the formed fender to completely cool the fender.

[0048] In a specific embodiment of the present invention, first, when in use, check whether there are foreign objects on the surfaces of the upper injection molding plate 7 and the lower injection molding plate 3, then drive the telescopic cylinder 15 to lower the lifting plate 6, so that the upper injection molding plate 7 and the lower injection molding plate 3 are mutually engaged through the sealing groove 4 and the sealing strip 9 to achieve the purpose of sealing, and the hot-melt plastic particles enter the injection branch pipe 23 through the injection pipe 17, and are injected into the space between the upper injection molding groove 8 and the lower injection molding groove 5 from the injection hole 16 at the end of the injection branch pipe 23, and the hot-melt plastic particles are filled into the space between the upper injection molding groove 8 and the lower injection molding groove 5 to form the structure of the mudguard to be produced, and then turn the control knob 21 to open the vacuum valve 20, and control the vacuum pump 22 to press the upper injection molding groove 8 and the lower injection molding groove 5. The space between the molding grooves 5 is vacuumed, and the air between the upper molding groove 8 and the lower molding groove 5 is extracted from the air inside the hot-melt plastic particles through the exhaust holes 24 opened in the upper molding plate 7. The air enters the exhaust duct 19 through the exhaust channel 18, and is guided into the vacuum pump 22 through the exhaust duct 19. The injection molding device is then left to stand, waiting for the injection molded hot-melt plastic particles to cool and form. After the fender is cooled and formed, the lifting motor 13 is driven to lift the top plate 12, and the top plate 12 lifts the fender, and the heat dissipation bellows 11 is controlled to start working, and the hot-melt molded fender is further cooled and formed, so that the fender is completely cooled and formed, and then taken out by the staff to complete the injection molding process of the fender.

[0049] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An automobile fender injection molding device, comprising a base (1), characterized in that: An injection molding box (2) is arranged on the top of the base (1), and a lower injection molding plate (3) is arranged inside the injection molding box (2), and a lower injection molding groove (5) is provided on the top of the lower injection molding plate (3), and a telescopic rod (14) is arranged on the top of the telescopic rod (14), and a lifting plate (6) is arranged on the top of the lifting plate (6), an upper injection molding plate (7) is arranged at the bottom of the lifting plate (6), and an upper injection molding groove (8) is provided at the bottom of the upper injection molding plate (7), and a material taking mechanism is arranged on both sides of the lower injection molding plate (3), and support blocks (10) are arranged on both sides of the base (1), a heat dissipation bellows (11) is arranged on the top of the support block (10), and a vacuum extraction mechanism is arranged inside the upper injection molding plate (7).

2. The automobile fender injection molding device according to claim 1, characterized in that: The material taking mechanism comprises a top plate (12), and the top plate (12) is symmetrically mounted on both sides of the top of the lower injection molding plate (3), and both sides of the top of the lower injection molding plate (3) are provided with sinking grooves (25), and the shape and size of the sinking grooves (25) match those of the top plate (12), and a lifting motor (13) is arranged at the bottom of the top plate (12).

3. The automobile fender injection molding device according to claim 2, characterized in that: The top of the top plate (12) is flush with the top of the lower injection molding plate (3), and the lifting motor (13) is symmetrically arranged on both sides of the bottom of the top plate (12). The lifting motor (13) is arranged inside the lower injection molding plate (3), and the top plate (12) moves along the lifting motor (13).

4. The automobile fender injection molding device according to claim 1, characterized in that: The vacuum pumping mechanism comprises an air suction hole (24), and the air suction hole (24) is provided at the bottom of the upper injection molding plate (7), one end of the air suction hole (24) is connected to an air suction channel (18), and the air suction channel (18) is provided inside the upper injection molding plate (7), the air suction channel (18) is a "human" shaped structure, and one end of the top of the air suction channel (18) is connected to an air suction conduit (19), the other end of the air suction conduit (19) is provided with a vacuum pump (22), and a vacuum valve (20) is sleeved on the outside of the air suction conduit (19), and a control knob (21) is provided on the top of the vacuum valve (20).

5. The automobile fender injection molding device according to claim 1, characterized in that: A plurality of injection holes (16) are provided on the top of the lower injection molding plate (3), and one end of the injection hole (16) is connected to an injection pipe (17), injection branches (23) are provided on both sides of the injection pipe (17), and the ends of the injection branches (23) respectively correspond to the injection holes (16).

6. The automobile fender injection molding device according to claim 1, characterized in that: The heat dissipation bellows (11) are symmetrically arranged on both sides of the base (1), and the position of the heat dissipation bellows (11) corresponds to the position between the lower injection molding groove (5) and the upper injection molding groove (8).

7. The automobile fender injection molding device according to claim 1, characterized in that: The shape and size of the injection molding box (2) match those of the upper injection molding plate (7), and a sealing groove (4) is provided on the top of the lower injection molding plate (3), and a sealing strip (9) is provided on the bottom of the upper injection molding plate (7), and the shape and size of the sealing groove (4) match those of the sealing strip (9).

8. The automobile fender injection molding device according to claim 1, characterized in that: The telescopic rod (14) is installed at the corner between the top of the base (1) and the bottom of the lifting plate (6), and a telescopic cylinder (15) is arranged on the top of the lifting plate (6), one end of the telescopic cylinder (15) corresponds to the telescopic rod (14), and the lifting plate (6) moves up and down along the telescopic rod (14).

9. The automobile fender injection molding device according to claim 1, characterized in that: The lower injection molding plate (3) and the upper injection molding plate (7) are both made of a high-temperature resistant metal material, and the shape and size of the lower injection molding groove (5) match those of the upper injection molding groove (8).

10. An injection molding process using the automobile fender injection molding device according to any one of claims 1 to 9, characterized in that: The following steps are involved: S1. After the plastic particles required for injection molding are heated and melted by a relevant machine, they are injected through the injection pipe (17) connected to the bottom of the base (1), and then flowed through the injection branch pipe (23) at the top of the injection pipe (17) and evenly injected into the lower injection tank (5); S2, driving the telescopic cylinder (15) to control the telescopic rod (14), the lifting plate (6) follows the telescopic rod (14) to move up and down, the movement of the lifting plate (6) drives the upper injection molding plate (7) to move, the upper injection molding plate (7) and the lower injection molding plate (3) are pressed together, and the upper injection molding groove (8) and the lower injection molding groove (5) form the required injection mold structure of the fender; S3, injecting hot-melt plastic particles from the injection hole (16) into the upper injection groove (8) and the lower injection groove (5) through the injection branch pipe (23), so that the hot-melt plastic particles form the structure of the fender; S4, the vacuum pump (22) extracts the air inside the upper injection molding groove (8) and the lower injection molding groove (5) when the hot melt plastic particles begin to be molded; S5. After the fender is formed by cooling the hot-melt plastic particles, the lifting motor (13) controls the top plate (12) to rise, and the formed fender is lifted up. The heat dissipation bellows (11) further dissipates heat from the formed fender, so that the fender is completely cooled.

Images