One-piece molding processing equipment for automobile exterior injection molding parts

Abstract

The present invention discloses an integrated molding processing equipment for automobile exterior injection molding parts, and relates to the technical field of automobile accessories processing. The present invention comprises a bottom plate, an injection molding assembly is installed on the top of the bottom plate, a bottom frame is installed on the top of the bottom plate, a reset table is installed on the top of the bottom frame, an injection assembly is installed on the top of the reset table, a feeding piece is installed on one side of the injection assembly, and the injection assembly comprises a crushing roller, and the crushing roller is used to crush the injection molding raw materials fed by the feeding piece; a reciprocating assembly is installed on the top of the reset table, and the reciprocating assembly is used to vertically move the injection assembly. While crushing the plastic raw materials, the present invention uses intermittent reciprocating scraping and active extrusion injection to greatly exhaust the air in the raw materials when they are injected into the injection mold, which is beneficial to solve the problem of shrinkage marks in the injection molded products.

Description

Technical Field

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

[0002] Injection molding is a common method for producing industrial products. It uses plastic molding molds to make thermoplastic materials or thermosetting materials into plastic products of various shapes. Automotive accessories are divided into exterior accessories, interior accessories and functional decorative parts. The plastic products in these accessories are mostly produced by injection molding.

[0003] The patent specification with publication number CN115782033A discloses a processing device and a processing technology of a car wiper motor cover, which includes a workbench and a wiper motor cover mold. A cleaning box is arranged on one side of the top surface of the workbench, and a rotating shaft that penetrates and extends to the outside of the cleaning box is rotatably connected to the inner wall of one side of the cleaning box. The plastic raw material particles are crushed by a second drive motor, a first screw conveyor, a material receiving trough, a third drive motor, a second screw conveyor and a crushing blade.

[0004] The purpose of cutting the plastic raw materials before injection molding is to reduce the spacing between the raw materials before heating and melting the raw materials, that is, to reduce the air ratio. Raw materials with a high air ratio will accumulate more bubbles after melting, resulting in partial filling problems, which will cause shrinkage marks on the finished product. In the pretreatment process of the plastic raw materials for automobile exterior parts, the injection molding equipment adopts a technical solution of first feeding and then crushing and finally flowing into the heating module from the discharge pipe. The shortcoming of this technical solution is that when it is injection molding, the raw material crushing step and the raw material injection step in the injection molding process are separated. This reduces the air ratio between the crushed plastic particles, but there is no external force pushing between the particles. In the process of flowing from the crushed particle structure into the injection mold, air will be mixed in for the second time, resulting in incomplete air exhaust and the finished product is prone to shrinkage. Summary of the invention

[0005] The purpose of the present invention is to provide an integrated molding processing equipment for automobile exterior injection molding parts. The technical problems to be solved are as follows: In the process of crushing plastic raw materials, the existing automobile exterior processing equipment fails to prevent the crushed raw materials from being mixed with air again when flowing into the injection mold, and the finished product is prone to shrinkage marks.

[0006] The purpose of the present invention can be achieved through the following technical solutions:

[0007] A one-piece molding processing equipment for automobile exterior injection molding parts, including a base plate, an injection molding component is installed on the top of the base plate, a base frame is installed on the top of the base plate, a reset platform is installed on the top of the base frame, an injection molding component is installed on the top of the reset platform, a feeding piece is installed on one side of the injection molding component, the injection molding component includes a crushing roller and an injection molding block, a cavity is provided at the injection molding block, the crushing roller is used for crushing the injection molding raw material fed by the feeding piece; a reciprocating component is installed on the top of the reset platform, and the reciprocating component is used for vertically moving the injection molding component.

[0008] As a further solution of the present invention: the injection molding component includes a plurality of support rods 1 fixedly connected to the top of the bottom plate, the bottom frame includes a bottom plate fixedly connected to the top of each of the support rods 1, a material passing block is fixedly connected to the middle of the bottom plate, a plurality of support rods 2 are fixedly connected to the peripheral side of the bottom plate, a middle plate is fixedly connected between the tops of each of the support rods 2, and a fixed barrel mouth is arranged in the middle of the middle plate.

[0009] As a further solution of the present invention: the reset platform includes a plurality of guide rods fixedly connected to the top of the middle layer plate, a reset spring is installed at the bottom of each guide rod, an injection molding plate is slidably connected between the middle parts of each guide rod, and the bottom surface of the injection molding plate is fixedly connected to each adjacent reset spring.

[0010] As a further solution of the present invention: the reciprocating assembly includes a plurality of support rods fixedly connected to the top of the injection molding plate, the top of each support rod is fixedly connected to a shift plate, the top of each guide rod is fixedly connected to a top plate, a telescopic cylinder is installed in the middle of the top plate, and the output end of the telescopic cylinder is fixedly connected to the shift plate.

[0011] As a further solution of the present invention: the injection assembly includes a crushing motor fixedly connected to the top of the injection molding plate, a crushing roller is installed at the output end of the crushing motor, a crushing barrel is fixedly connected between the middle plate and the bottom plate, the bottom surface of the crushing barrel is fixedly connected to the bottom plate, and the top is far away from the injection molding plate, the injection block is fixedly connected to the bottom of the crushing barrel, and a feed port is arranged on one side of the crushing barrel.

[0012] As a further solution of the present invention: spiral crushing blades are arranged on the peripheral side of the crushing roller, and the distance between the crushing blades and the inner wall of the crushing barrel in a single circle gradually decreases towards the bottom plate, and the cavity is arranged between the injection block and the bottom end of the crushing barrel.

[0013] As a further solution of the present invention: the feeding piece includes a hopper, an inclined cavity is provided at the bottom of the hopper, a feeding port is provided at the bottom end of the inclined cavity, a connecting tube block is fixedly connected to one side of the feeding port, the connecting tube block is fixedly connected to the crushing tube, a meter is provided on one side of the hopper, the feeding piece is transparent, and the feeding port is connected to the feeding port.

[0014] Beneficial effects of the present invention:

[0015] 1. In the present invention, an injection molding assembly is installed on a bottom plate, and a base frame and a reset platform are installed above the injection molding assembly, an injection molding assembly is installed between the base frame and the reset platform, and a feeding piece is installed on one side of the injection molding assembly. When in use, the material is fed into the crushing cylinder in the injection molding assembly from the feeding piece, and a crushing roller driven by a crushing motor is installed in the crushing cylinder. The crushing roller cooperates with the crushing cylinder to crush the plastic raw material and transmits it downward. The crushed raw material is located in the cavity between the bottom end of the crushing roller and the injection molding block. Then, the crushing motor is pressed down by the reciprocating assembly, and the crushing roller squeezes the raw material through the discharge hole of the injection molding block into the final injection mold. That is, after the raw material is crushed and transmitted, the crushing roller squeezes the raw material into the closed space with a single outlet to exhaust the air, thereby avoiding the interference of secondary air mixing when the raw material is transmitted after crushing, and effectively reducing the air proportion of the raw material;

[0016] The present invention first utilizes a crushing roller to crush large-particle raw materials into small-particle raw materials in a crushing barrel. During this crushing process, raw material powder will remain adhered to the inner wall of the crushing barrel. The present invention utilizes the downward movement of the crushing roller in conjunction with the cavity to achieve compression of the raw materials. The technical advantage lies in that the crushing roller will scrape off the raw material powder remaining adhered to the inner wall of the crushing barrel during the downward movement, causing the raw material powder to fall into the inner cavity. The raw material powder will further fill the gaps between the small-particle raw materials, causing the raw materials in the inner cavity to be in a denser state before compression. This technical means can ensure that the gaps between the small-particle raw materials are further reduced before compression. That is to say, in this case, an integrated technical solution is constructed by crushing the raw materials using a crushing roller and compressing the raw materials using a crushing roller in conjunction with the inner cavity, which aims to effectively solve the problem of the proportion of air when the product raw materials are crushed, thereby helping to avoid shrinkage marks in the finished product.

[0017] 2. In the present invention, the crushing motor of the injection assembly is installed on the injection molding plate supported by the return spring, and the injection molding plate is controlled by the vertical displacement of the telescopic cylinder in the reciprocating assembly. At the same time, since the hopper is in a transparent state with a meter, the injection molding required for injection molding can be fed in batches during the actual feeding process. The crushing roller is first moved up before a single feeding. After the crushing and transmission are completed, the raw material is stored in the cavity above the injection molding block, and then the crushing roller is moved down for injection molding. After that, the return spring cooperates with the telescopic cylinder to move up for another feeding and injection molding. The two crushing processes of the crushing roller between adjacent injections are controlled by the reciprocating assembly, and there is an interval time. The significance of intermittently controlling the injection process by cooperating with the feeding piece with a metering function and the reciprocating assembly is that the shrinkage marks of the finished injection molding product are not only affected by the air proportion before the raw material is injected, but also by the temperature change during the injection process. The phased injection can wait until the melting temperature of the raw material injected last time is stable before the next injection, thereby avoiding the shrinkage mark phenomenon caused by the shrinkage of the finished product due to temperature change. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention will be further described below in conjunction with the accompanying drawings.

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0020] Figure 2 It is a partial half-section diagram of the present invention;

[0021] Figure 3 The present invention Figure 1 A magnified detail of the center point A;

[0022] Figure 4 The present invention Figure 2 A magnified view of the detail at B in the middle;

[0023] Figure 5 The present invention Figure 2 A magnified view of the details at C in the middle;

[0024] Figure 6 It is a structural schematic diagram of the feeding piece of the present invention;

[0025] Figure 7 The present invention Figure 1 Enlarged detail of point D in the middle.

[0026] In the figure: 1. bottom plate; 2. injection molding assembly; 21. support rod 1; 22. baffle; 23. injection molding mold; 24. slider; 25. slide rail; 26. lock; 3. bottom frame; 31. bottom plate; 32. feeding block; 33. support rod 2; 34. middle plate; 35. fixed barrel mouth; 4. reset table; 41. guide rod; 42. reset spring; 43. injection molding plate; 5. injection molding assembly; 51. crushing motor; 52. crushing roller; 53. crushing barrel; 54. injection molding block; 55. feeding port; 6. feeding piece; 61. hopper; 62. inclined cavity; 63. feeding port; 64. barrel block; 65. meter; 7. reciprocating assembly; 71. support rod; 72. shift plate; 73. top plate; 74. telescopic cylinder. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] like Figures 1 to 7 As shown, an integrated molding processing equipment for automobile exterior injection molding parts includes a base plate 1, an injection molding component 2 is installed on the top of the base plate 1, and the injection molding component 2 is used to receive the injection molding material for the final injection molding operation. A base frame 3 is installed on the top of the base plate 1 on the surrounding side of the injection molding component 2, a reset platform 4 is installed on the top of the base frame 3, an injection assembly 5 is installed on the top of the reset platform 4, a feeding piece 6 is installed on one side of the injection assembly 5, the injection assembly 5 includes a crushing roller 52, the crushing roller 52 is used to crush the injection molding material fed by the feeding piece 6, and a reciprocating assembly 7 is installed on the top of the reset platform 4, and the reciprocating assembly 7 is used to vertically move the injection assembly 5.

[0029] like Figure 1 and Figure 7 As shown, the injection molding assembly 2 includes three support rods 21 arranged in a triangular orientation and fixedly connected to the base plate 1, a baffle 22 is fixedly connected between the inner side of one of the support rods 21 and the base plate 1, an injection mold 23 is arranged on one side of the baffle 22, two parallel sliders 24 are installed at the bottom of the injection mold 23, the base plate 1 is adapted to the sliders 24 to open two slide rails 25, the sliders 24 are slidably connected to the adjacent slide rails 25, and a limiting hole is opened at the bottom of the slide rails 25, and a lock buckle 26 is installed on one side of the injection mold 23 just above the two slide rails 25, and the lock buckle 26 is used to cooperate with the limiting hole and the baffle 22 to limit the injection mold 23;

[0030] Specifically, since the injection mold 23 needs to be accurately positioned during injection molding and needs to be easily demolded after the injection molding is completed, a sliding structure of a slider 24 and a slide rail 25 is provided at the bottom of the injection mold 23 to facilitate movement during entry and exit. After the injection mold 23 is pushed between the two slide rails 25, the injection mold 23 can be positioned by the lock buckle 26 cooperating with the limiting hole on the slide rail 25, wherein the lock buckle 26 includes a lock box, and a plug rod is installed in the lock box to limit the position. The plug rod is located inside the lock box. The middle part is connected by a spring, and a limit rod is installed laterally on the top of the plug rod. A lock hole is set on the outside of the lock box to match the limit rod. The lock hole is connected by a vertical slot and an oblique upward slot. The bottom of the plug rod is connected to the limit hole. When locking, the user grabs the limit rod and moves it downward. The spring in the plug rod pushes the bottom of the plug rod to insert into the limit hole, and then the limit rod is pulled sideways to make it stuck in the oblique slot. When unlocking is required, the limit rod is pulled back to the vertical slot. At the same time, the compressed spring drives the bottom of the plug rod to move upward to achieve unlocking.

[0031] That is, on the bottom plate 1, the bottom layer of the device, the injection mold 23 used for the final injection molding is conveniently locked and moved through the injection molding assembly 2, so as to facilitate the convenient cycle of the injection molding process.

[0032] like Figures 1 to 3 As shown, the base frame 3 includes a bottom plate 31 fixedly connected to the top of three support rods 21, a feeding block 32 is fixedly connected to the center of the bottom plate 31, the feeding block 32 is used to assist the injection action of the injection assembly 5, three support rods 2 33 are fixedly connected to the sides of the bottom plate 31, a middle plate 34 is fixedly connected between the tops of the three support rods 2 33, and a fixed barrel mouth 35 is set at the center of the middle plate 34.

[0033] The reset platform 4 includes three guide rods 41 fixedly connected to the top of the middle plate 34, and reset springs 42 are installed at the bottom of the three guide rods 41. An injection molding plate 43 is slidably connected between the middle parts of the three guide rods 41, and the bottom surface of the injection molding plate 43 is fixedly connected to each adjacent reset spring 42;

[0034] The reciprocating assembly 7 includes three support rods 71 ​​fixedly connected to the top of the injection molding plate 43, the top of each support rod 71 is fixedly connected to the shift plate 72, the top of each guide rod 41 is fixedly connected to the top plate 73, and the center of the top plate 73 is equipped with a telescopic cylinder 74, and the piston rod of the telescopic cylinder 74 passes through the top plate 73 and is fixedly connected to the shift plate 72;

[0035] It should be noted that when the telescopic cylinder 74 is telescoping and controlling the piston rod, it drives the shift plate 72 fixedly connected to the bottom end of the piston rod to move longitudinally. The bottom of the shift plate 72 is fixedly connected to the injection molding plate 43 by means of the support rod 71, and the injection assembly 5 is installed on the injection molding plate 43 of the reset table 4, thereby realizing the vertical reset displacement of the injection assembly 5. When the injection molding plate 43 moves downward, the reset spring 42 is compressed by force. When the injection molding plate 43 moves upward, the reset spring 42 is affected by the elastic force to assist in reset. Since the injection assembly 5 moves downward during the injection molding process, there is a certain reset resistance. Therefore, the reset spring 42 is used to assist the telescopic cylinder 74 to move the injection assembly 5 upward.

[0036] like Figures 1 to 5 As shown, the injection assembly 5 includes a crushing motor 51 fixedly connected to the top of the injection molding plate 43, a crushing roller 52 is installed at the output end of the crushing motor 51, a crushing barrel 53 is fixedly connected between the middle plate 34 and the bottom plate 31, the bottom surface of the crushing barrel 53 is fixedly connected to the bottom plate 31, and the middle part is fixedly connected to the middle plate 34 through the fixed barrel opening 35, and the top is in a state of being away from the injection molding plate 43 in the uncompressed state of the return spring 42, the bottom of the crushing barrel 53 is fixedly connected to the injection molding block 54, the feed block 32 is used to fix the injection molding block 54, and the injection molding block 54 is used for the final injection molding of the raw material, and a feed port 55 is set on one side of the crushing barrel 53, and the bottom of the feeding piece 6 is connected to the feed port 55;

[0037] It should be noted that the raw materials injected into the crushing drum 53 through the feeding port 55 by the feeding member 6 will be crushed and transmitted downward by the crushing roller 52 driven by the crushing motor 51. The side surface of the crushing roller 52 is a spiral crushing blade, and the feeding gap of the side section of the crushing blade is gradually reduced from the inner wall of the crushing drum 53 (see Figure 5 ), that is, the raw material is gradually compressed during the process of being spirally conveyed downward, so as to achieve the effect of crushing during the transmission process. The bottom end of the crushing roller 52 is conical, and a cavity is set on the upper part of the injection block 54 installed at the bottom end of the crushing cylinder 53. It should be clear that the cavity specifically refers to the sum of the inner cavity body of the injection block 54 and the space above it reserved for the reciprocating motion of the crushing roller 52 (see Figure 4 ), the cavity is used to receive the crushed raw materials, and a discharge hole is set at the bottom of the injection block 54, which is connected to the injection inlet at the top of the injection mold 23. The aperture of the discharge hole is small, which is convenient for preventing air from entering the injection mold 23 during pressure extrusion. In particular, when the return spring 42 is in an uncompressed state, the distance between the top of the crushing cylinder 53 and the injection plate 43 is equal to the distance between the bottom of the crushing roller 52 and the injection block 54, so that when the bottom of the crushing roller 52 compresses and feeds to the bottom, the top downward stroke reaches the maximum value synchronously, and then the reciprocating assembly 7 drives the crushing roller 52 to move upward to wait for the next feeding;

[0038] In addition, in the process of raw material crushing by this processing equipment, the raw materials have three forms, namely, large-particle raw materials before feeding and not crushed, small-particle raw materials after being crushed by the crushing roller 52, and raw material powder remaining on the inner wall of the crushing tube 53 during the squeezing and crushing process of the crushing roller 52 toward the inner wall of the crushing tube 53. When the crushing roller 52 moves downward, in addition to squeezing and crushing the large-particle raw materials into small-particle raw materials, the raw material powder will also be scraped into the cavity, so that the raw material powder fills the gaps between the small-particle raw materials.

[0039] like Figure 2 , Figure 5 and Figure 6 As shown, the feeding piece 6 includes a hopper 61 at the top, an oblique cavity 62 is provided at the bottom of the hopper 61, a feeding port 63 is provided at the bottom of the oblique cavity 62, a tube block 64 is fixedly connected to one side of the feeding port 63, the tube block 64 is fixedly connected to the crushing cylinder 53, a meter 65 is provided on one side of the hopper 61, and the feeding piece 6 is transparent as a whole, and is preferably an acrylic plate;

[0040] It should be noted that the feeding piece 6 is fixedly connected to the crushing barrel 53 through the tube block 64 at the bottom, and the feeding port 63 is connected to the feeding port 55 on the crushing barrel 53, so that the raw material can be injected into the hopper 61, and then the reciprocating component 7 drives the injection component 5 to crush and transport the raw material; because the hopper 61 is transparent and has a meter 65, when it cooperates with the telescopic cylinder 74 to feed, the material can be fed in stages and the feeding amount can be observed, and the telescopic cylinder 74 can be moved upward at the same time to achieve the crushing accumulation of the raw material in the crushing barrel 53 without performing the final injection operation, so that the injection molding process is carried out in stages. Since the automotive exterior accessories parts are in a high-temperature molten state in the injection mold 23, the uninterrupted injection of molten raw materials will result in the failure of the front and rear temperatures to be transmitted in time, resulting in heat accumulation inside the product, thereby causing stress changes and shrinkage deformation. Therefore, the staged injection molding can be carried out after the temperature of the front raw material is stable, which effectively avoids the shrinkage of the product caused by uneven temperature.

[0041] In addition, by arranging an injection molding component 2 on the base plate 1, installing a base frame 3 on the injection molding component 2, installing a reset platform 4 on the top of the base frame 3, installing an injection component 5 on the reset platform 4, and installing a reciprocating component 7 on the top of the reset platform 4 to perform vertical and time-interval periodic control on the injection component 5, and installing a feeding piece 6 on one side of the injection component 5, the equipment can lock and unlock the injection mold 23 with the help of the injection molding component 2, control the feeding process with the help of the feeding piece 6, and crush and inject the input raw materials by the reciprocating component 7 and the injection component 5, that is, the equipment realizes the integrated molding function of feeding, crushing, injecting and discharging in the injection molding process through the organic combination of the vertical structure, and the vertical structure has a low lateral space occupancy rate, that is, the required production space is small, and it has the ability of integrated molding, making it very suitable for small and micro enterprises to carry out injection molding production of automotive exterior parts.

[0042] The above is a detailed description of an embodiment of the present invention, but the content is only a preferred embodiment of the present invention and cannot be considered to limit the scope of implementation of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of the patent coverage of the present invention.

Claims

1. An integrated molding processing device for automobile exterior injection molding parts, comprising a base plate (1), an injection molding component (2) being installed on the top of the base plate (1), characterized in that: A bottom frame (3) is mounted on the top of the bottom plate (1), a reset platform (4) is mounted on the top of the bottom frame (3), an injection assembly (5) is mounted on the top of the reset platform (4), a feeding piece (6) is mounted on one side of the injection assembly (5), the injection assembly (5) comprises a crushing roller (52) and an injection block (54), a cavity is provided at the injection block (54), the crushing roller (52) is used to crush the injection material fed by the feeding piece (6); a reciprocating assembly (7) is mounted on the top of the reset platform (4), the reciprocating assembly (7) is used to vertically move the injection assembly (5); The injection molding assembly (2) includes a plurality of support rods (21) fixedly connected to the top of the bottom plate (1), the bottom frame (3) includes a bottom plate (31) fixedly connected to the top of each support rod (21), a material passing block (32) fixedly connected to the middle of the bottom plate (31), a plurality of support rods (33) fixedly connected to the side surface of the bottom plate (31), a middle plate (34) fixedly connected between the tops of each support rod (33), and a fixed barrel opening (35) is provided in the middle of the middle plate (34); The reset platform (4) includes a plurality of guide rods (41) fixedly connected to the top of the middle plate (34), a reset spring (42) is installed at the bottom of each guide rod (41), an injection molding plate (43) is slidably connected between the middle parts of each guide rod (41), and the bottom surface of the injection molding plate (43) is fixedly connected to each adjacent reset spring (42); The reciprocating assembly (7) comprises a plurality of support rods (71) fixedly connected to the top of the injection molding plate (43), the top of each support rod (71) being fixedly connected to a shift plate (72), the top of each guide rod (41) being fixedly connected to a top plate (73), a telescopic cylinder (74) being installed in the middle of the top plate (73), and the output end of the telescopic cylinder (74) being fixedly connected to the shift plate (72); The injection assembly (5) comprises a crushing motor (51) fixedly connected to the top of the injection molding plate (43), a crushing roller (52) is installed at the output end of the crushing motor (51), a crushing cylinder (53) is fixedly connected between the middle plate (34) and the bottom plate (31), the bottom surface of the crushing cylinder (53) is fixedly connected to the bottom plate (31), and the top end is far away from the injection molding plate (43), the injection molding block (54) is fixedly connected to the bottom of the crushing cylinder (53), and a feeding port (55) is arranged on one side of the crushing cylinder (53).

2. The one-piece molding processing equipment for automobile exterior injection molding according to claim 1 is characterized in that: The crushing roller (52) is provided with spiral crushing blades on its circumferential side, and the distance between the crushing blades and the inner wall of the crushing cylinder (53) in a single circle gradually decreases in a direction approaching the bottom plate (1), and the cavity is provided between the injection block (54) and the bottom end of the crushing cylinder (53).

3. The one-piece molding processing equipment for automobile exterior injection molding according to claim 1 is characterized in that: The feeding piece (6) comprises a hopper (61), an oblique cavity (62) is arranged at the bottom of the hopper (61), a feeding port (63) is arranged at the bottom end of the oblique cavity (62), a connecting tube block (64) is fixedly connected to one side of the feeding port (63), the connecting tube block (64) is fixedly connected to the crushing tube (53), a meter (65) is arranged on one side of the hopper (61), the feeding piece (6) is transparent, and the feeding port (63) is connected to the feeding port (55).

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