Anti-loosening non-melting-mark injection molding device based on automotive trim plastic part

Abstract

The utility model relates to the technical field of injection molding devices, in particular to an anti-loosening melt-mark-free injection molding device based on automotive trim plastic parts, which comprises an injection molding machine tool and a cooling water pump, the cooling water pump is mounted on the inner side of the injection molding machine tool, a fixed mold component is fixedly connected to the inner side of the injection molding machine tool, and a discharging hopper is fixedly connected to the inner side of the top end of the injection molding machine tool. The fixed mold assembly comprises a molding cavity pipe, an injection molding hole is formed in the upper end of the molding cavity pipe, a cooling pipe is rotationally connected to the outer side of the molding cavity pipe, and a vertical plate is fixedly connected to the outer side of the cooling pipe; according to the injection molding machine disclosed by the utility model, a stirring system is introduced on the basis of effectively preventing a mold from loosening, so that the uniformity and the flowability of an injection molding material in a molten state are ensured, and the compactness and the strength of a finished product are remarkably improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to injection molding device technical field, concretely is based on the anti-loose no melt mark injection molding device of interior trim plastic part of car. BACKGROUND

[0002] Injection molding device, also known as injection molding machine, its working principle is to add plastic raw materials into the cylinder, melt plastic raw materials through heating, then melt plastic is injected into the mold cavity by high pressure, after cooling solidification, the equipment of getting the required plastic product, mainly used for producing various shapes of plastic products, such as automobile parts, household appliance shell, toys etc.;

[0003] Automobile interior trim plastic part needs to meet strict safety standards, and the looseness of the mold may lead to product unqualified in safety test, which affects the safety performance of the whole vehicle, therefore, the automobile interior trim plastic part needs to prevent the mold from loosening during injection molding to ensure the stability and safety of the interior trim part and improve the durability and reliability;

[0004] The anti-loose measure taken to the mold during injection molding of automobile interior trim plastic part will lead to the complication of mold design, and the complex mold will make the flowability of plastic material in molten state worse, so that the melt stays in the mold for too long, which leads to temperature reduction, thereby increasing the risk of forming product weld mark, therefore, the anti-loose no melt mark injection molding device based on automobile interior trim plastic part is proposed for the above problems. UTILITY MODEL CONTENTS

[0005] The utility model aims at providing the anti-loose no melt mark injection molding device based on automobile interior trim plastic part to solve the problem that the complex mold will make the flowability of plastic material in molten state worse, so that the melt stays in the mold for too long, which leads to temperature reduction, thereby increasing the risk of forming product weld mark.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical scheme:

[0007] The utility model provides an anti -loosening no -fusing mark injection device based on car interior plastic spare, including injection machine and cooling water pump, the inside of injection machine is installed with cooling water pump, the inside of injection machine is fixedly connected with fixed mode subassembly, the top inside of injection machine fixedly connected with the hopper, the hopper lower end fixedly connected with hot melt injection bin, the inside of hot melt injection bin is installed with injection assembly, the inside of injection machine is equipped with inclined hole, the fixed mode subassembly includes forming cavity pipe, the upper end of forming cavity pipe is equipped with injection hole, the outside of forming cavity pipe rotatably connected with cooling pipe, the outside of cooling pipe fixedly connected with vertical board, the upper end of vertical board fixedly connected with sealing ring, the upper end of sealing ring fixedly connected with clamping column, the inside of clamping column is installed with clamping assembly, the clamping assembly includes extrusion piece, the outside of extrusion piece is slidably connected with fixed ring, one side of fixed ring is fixedly connected with extrusion spring, one end of extrusion spring is fixedly connected with connecting block, one side of connecting block is equipped with block slot, the injection assembly includes shell, the inside of shell rotatably connected with injection inner tube, the inside of injection inner tube is equipped with clamping groove, the inside of injection inner tube is equipped with limiting groove, the bottom of injection inner tube fixedly connected with pipe nozzle, the inside of shell fixedly connected with feed inlet, the inside of shell fixedly connected with stirring assembly, the inside of shell fixedly connected with limiting ring, the inside of limiting ring is installed with ball, the stirring assembly includes shaft, the outside of shaft rotatably connected with rotating column, the outside of rotating column fixedly connected with clamping rod, the outside of rotating column rotatably connected with protection shell, the bottom of rotating column fixedly connected with transmission crown tooth, the shaft is fixedly connected with limiting pipe, the inside of limiting pipe rotatably connected with stirring rod, the outside of stirring rod fixedly connected with driven crown tooth, the outside of stirring rod fixedly connected with stirring blade.

[0008] As the further optimization of the utility model, the cooling water pump is provided with two, the two cooling water pumps are symmetrically distributed in the inside of the injection machine, the fixed mode subassembly and the injection assembly are coaxial, the inclined hole is provided with two, the two inclined holes are centrally symmetrically distributed in the inside of the injection machine.

[0009] As the further optimization of the utility model, the bottom of the forming cavity pipe is fixedly connected with the injection machine, the outside of the forming cavity pipe is attached to the inside of the cooling pipe, the vertical board is provided with a plurality of, the vertical boards are evenly and equidistantly distributed in the outside of the cooling pipe in annular array.

[0010] As the further optimization of the utility model, the sealing ring is annular, the outside of the sealing ring is attached to the inside of the injection machine, the inside of the sealing ring is attached to the outside of the forming cavity pipe, the clamping column is provided with two, the two clamping columns are symmetrically distributed on the upper end of the sealing ring.

[0011] As the further optimization of the utility model, wherein: the extrusion block one end is arc-shaped, the fixed circle outside is fixedly connected with the clamping column, the extrusion spring center shaft and the connecting block center shaft are on the same straight line, the connecting block lower end is arc-shaped, the block slot inside and the clamping rod outside are attached.

[0012] As the further optimization of the utility model, wherein: the shell bottom end and the injection molding inner tube bottom end are on the same horizontal plane, the injection molding inner tube bottom end and the sealing ring upper end are attached, the nozzle outside and the injection molding hole inside are attached, one side of the clamping groove is arc-shaped, the limiting groove inside is rotatably connected with the limiting ring, the ball is provided with a plurality of, the ball is evenly distributed in the limiting ring inside in annular array.

[0013] As the further optimization of the utility model, wherein: the transmission crown tooth bottom end is engaged with the driven crown tooth, the driven crown tooth is provided with two, two driven crown teeth are symmetrically distributed in the protective shell inside, the stirring rod center shaft and the driven crown tooth center shaft are on the same straight line.

[0014] Compared with the prior art, the utility model has the advantages that:

[0015] In the utility model, the setting of the fixed mold assembly and the injection molding assembly introduces the stirring system on the basis of effectively preventing the mold loosening, ensures the uniformity and flowability of the injection molding material in the molten state, thereby significantly improves the compactness and strength of the finished product, and optimizes and upgrades the cooling system, guarantees the heat distribution characteristics and heat dissipation demand in the injection molding process, effectively avoids the product surface welding mark problem caused by uneven cooling or insufficient stirring of raw materials. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is whole structure schematic diagram of the utility model;

[0017] Figure 2 It is whole cross section structure schematic diagram of the utility model;

[0018] Figure 3 It is fixed mold assembly structure schematic diagram of the utility model;

[0019] Figure 4 It is fixed mold assembly explosion structure schematic diagram of the utility model;

[0020] Figure 5 It is injection molding assembly explosion structure schematic diagram of the utility model;

[0021] Figure 6 It is clamping assembly explosion structure schematic diagram of the utility model;

[0022] Figure 7 It is stirring assembly cross section structure schematic diagram of the utility model.

[0023] Fig. 1, injection molding machine; 2, cooling water pump; 3, fixed mold assembly;

[0024] 31, forming cavity tube; 32, injection hole; 33, cooling pipe; 34, vertical plate; 35, sealing ring; 36, clamping column; 37, clamping assembly; 371, extrusion block; 372, fixing ring; 373, extrusion spring; 374, connecting block; 375, inter-block groove;

[0025] 4, lower hopper; 5, hot melt injection material bin; 6, injection assembly;

[0026] 61, shell; 62, injection inner tube; 63, clamping groove; 64, limiting groove; 65, nozzle; 66, feeding port; 67, stirring assembly; 671, shaft rod; 672, rotating column; 673, clamping rod; 674, protective shell; 675, transmission crown tooth; 676, limiting tube; 677, stirring rod; 678, driven crown tooth; 679, stirring blade; 68, limiting ring; 69, ball bearing;

[0027] 7, inclined hole. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0029] It should be noted that the terms used herein are only for the purpose of describing specific embodiments, and are not intended to limit the exemplary embodiments according to the present application. As used herein, the singular form is intended to include the plural form unless the context clearly indicates otherwise, and furthermore, it should be understood that when the terms "comprise" and / or "include" are used in the specification, there is a feature, step, operation, device, component and / or combination thereof.

[0030] Please refer to Figures 1-7 The present application provides a technical solution:

[0031] The application discloses an anti-loosening and no-fusion mark injection device for an automotive interior plastic part, which comprises an injection machine 1 and a cooling water pump 2, wherein the cooling water pump 2 is arranged on the inner side of the injection machine 1, a fixed mold assembly 3 is fixedly connected to the inner side of the injection machine 1, a lower hopper 4 is fixedly connected to the top end of the injection machine 1, a hot-melt injection bin 5 is fixedly connected to the lower end of the lower hopper 4, an injection assembly 6 is arranged on the inner side of the hot-melt injection bin 5, and an inclined hole 7 is formed in the inner side of the injection machine 1.

[0032] As a further implementation of the application, the transmission crown tooth 675 is meshed with the driven crown tooth 678, the driven crown tooth 678 is provided with two, the two driven crown teeth 678 are symmetrically distributed on the inner side of the protection shell 674, and the central shaft of the stirring rod 677 and the central shaft of the driven crown tooth 678 are on the same straight line, so that the force is transmitted between the parts, and the operation effect of the device is better realized.

[0033] As a further implementation of the scheme, the cooling water pump 2 is provided with two, two cooling water pump 2 is symmetrically distributed in the injection molding machine 1 inside, between the mold assembly 3 and the injection assembly 6 is the same axis, the inclined hole 7 is provided with two, two inclined hole 7 is centrally symmetrically distributed in the injection molding machine 1 inside, the bottom end of the forming cavity tube 31 is fixedly connected with the injection molding machine 1, the outside of the forming cavity tube 31 is attached to the inside of the cooling pipe 33, the vertical plate 34 is provided with several, the vertical plate 34 is evenly and equidistantly distributed in the annular array outside the cooling pipe 33, such design makes the parts fit closely, which is beneficial to heat transfer;

[0034] As a further implementation of the scheme, the sealing ring 35 is annular, the sealing ring 35 is attached to the inside of the injection molding machine 1, the sealing ring 35 is attached to the outside of the forming cavity tube 31, the clamping column 36 is provided with two, two clamping columns 36 are symmetrically distributed on the upper end of the sealing ring 35, such design can improve the sealing of the device, prevent raw material leakage;

[0035] As a further implementation of the scheme, the extrusion block 371 is arc-shaped at one end, the fixed ring 372 is fixedly connected with the clamping column 36 outside, the center axis of the extrusion spring 373 is on the same straight line with the center axis of the connecting block 374, the lower end of the connecting block 374 is arc-shaped, the inside of the block slot 375 is attached to the outside of the clamping rod 673, such design improves the fit between parts, which is beneficial to the mutual cooperation between parts;

[0036] As a further implementation of the scheme, the bottom end of the shell 61 is on the same horizontal plane with the bottom end of the injection inner tube 62, the bottom end of the injection inner tube 62 is attached to the upper end of the sealing ring 35, the outside of the nozzle 65 is attached to the inside of the injection hole 32, one side of the clamping groove 63 is arc-shaped, the inside of the limiting groove 64 is rotatably connected with the limiting ring 68, the ball 69 is provided with several, the ball 69 is evenly and equidistantly distributed in the annular array inside the limiting ring 68, such design can reduce the friction between parts, save work.

[0037] Work flow: when the device is in use, pour the plastic particles into the hopper 4, the plastic particles into the hot melt injection bin 5 are melted, will enter the shell 61 through the feed port 66, at this time the lifting rod on the injection molding machine 1 will control the injection molding assembly 6 to slide down in the hot melt injection bin 5, finally make the nozzle 65 outside and the inside of the injection hole 32 completely fit, at this time the lower end of the injection inner tube 62 and the upper end of the sealing ring 35 fit, the outside of the sealing ring 35 and the inside of the injection molding machine 1 fit, which can ensure that there is no leakage during injection molding, while the injection molding assembly 6 slides down, the clamping assembly 37 installed inside the clamping column 36 will enter the clamping groove 63, due to the arc shape of one side of the clamping groove 63, the extrusion block 371 slides up in the clamping groove 63 at the same time, will be extruded by the injection inner tube 62, at this time the extrusion block 371 and the block groove 375 together compress the compression spring 373, so that the clamping assembly 37 can pass through the clamping groove 63, when the clamping assembly 37 passes through the clamping groove 63, the compression spring 373 restores the deformation, so that the connecting block 374 moves, this time the clamping rod 673 will be clamped into the block groove 375, start the cooling water pump 2, the cooling water pump 2 will make the water flow through the inclined hole 7, due to the special shape of the inclined hole 7, after the water flow, it can better promote the vertical plate 34, make the vertical plate 34 drive the cooling pipe 33 to rotate, so that the cooling pipe 33 can cool the forming cavity pipe 31 more evenly, the rapid cooling and solidification of the molten plastic can effectively eliminate the fusion mark, at the same time, the rotation of the vertical plate 34 will drive the clamping column 36 to rotate through the sealing ring 35, when the clamping column 36 rotates, it will drive the injection inner tube 62 to rotate, due to the setting of the limiting ring 68 and the ball 69, it can reduce the friction resistance of the injection inner tube 62 when rotating, the rotation of the clamping column 36 will also drive the clamping rod 673 to rotate through the clamping assembly 37, the rotation of the clamping rod 673 drives the rotation of the fixedly connected rotating column 672, the rotation of the rotating column 672 drives the rotation of the transmission crown tooth 675 fixedly connected at the lower end, the rotation of the transmission crown tooth 675 drives the rotation of the two meshing driven crown teeth 678, the rotation of the driven crown tooth 678 drives the rotation of the stirring rod 677 fixedly connected, the rotation of the stirring rod 677 makes the stirring blade 679 fully stir the injection material in the shell 61, which can greatly reduce the probability of air pocket in the injection part.

[0038] Although the embodiments of the present application have been shown and described, it should be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. An anti-loosening, melt-mark-free injection molding device for automotive interior plastic parts, comprising an injection molding machine (1) and a cooling water pump (2), characterized in that: A cooling water pump (2) is installed inside the injection molding machine (1). A fixed mold assembly (3) is fixedly connected inside the injection molding machine (1). A feeding hopper (4) is fixedly connected inside the top of the injection molding machine (1). A hot melt injection chamber (5) is fixedly connected to the lower end of the feeding hopper (4). An injection molding assembly (6) is installed inside the hot melt injection chamber (5). An oblique hole (7) is opened inside the injection molding machine (1). The fixed mold assembly (3) includes a molding cavity tube (31), an injection hole (32) is provided at the upper end of the molding cavity tube (31), a cooling pipe (33) is rotatably connected to the outside of the molding cavity tube (31), a vertical plate (34) is fixedly connected to the outside of the cooling pipe (33), a sealing ring (35) is fixedly connected to the upper end of the vertical plate (34), a locking post (36) is fixedly connected to the upper end of the sealing ring (35), and a locking assembly (37) is installed on the inner side of the locking post (36). The engaging assembly (37) includes a pressing block (371), a fixing ring (372) is slidably connected to the outside of the pressing block (371), a pressing spring (373) is fixedly connected to one side of the fixing ring (372), a connecting block (374) is fixedly connected to one end of the pressing spring (373), and a block groove (375) is opened on one side of the connecting block (374). The injection molding assembly (6) includes a housing (61), an injection molding inner tube (62) rotatably connected to the inner side of the housing (61), a slot (63) is provided on the inner side of the injection molding inner tube (62), a limiting groove (64) is provided on the outer side of the inner side of the injection molding inner tube (62), a nozzle (65) is fixedly connected to the bottom end of the injection molding inner tube (62), a feed port (66) is fixedly connected to the inner side of the housing (61), a stirring assembly (67) is fixedly connected to the inner side of the housing (61), a limiting ring (68) is fixedly connected to the inner side of the housing (61), and a ball bearing (69) is installed on the inner side of the limiting ring (68). The stirring assembly (67) includes a shaft (671), a rotating column (672) rotatably connected to the outside of the shaft (671), a locking rod (673) fixedly connected to the outside of the rotating column (672), a protective shell (674) rotatably connected to the outside of the rotating column (672), a transmission crown tooth (675) fixedly connected to the bottom end of the rotating column (672), a limiting tube (676) fixedly connected through the shaft (671), a stirring rod (677) rotatably connected to the inside of the limiting tube (676), a driven crown tooth (678) fixedly connected to the outside of the stirring rod (677), and a stirring blade (679) fixedly connected to the outside of the stirring rod (677).

2. The anti-loosening, melt-mark-free injection molding device for automotive interior plastic parts according to claim 1, characterized in that: There are two cooling water pumps (2), which are symmetrically distributed inside the injection molding machine (1). The fixed mold assembly (3) and the injection molding assembly (6) are on the same axis. There are two oblique holes (7), which are centrally symmetrically distributed inside the injection molding machine (1).

3. The anti-loosening, melt-mark-free injection molding device for automotive interior plastic parts according to claim 1, characterized in that: The bottom end of the molding cavity tube (31) is fixedly connected to the injection molding machine tool (1). The outer side of the molding cavity tube (31) is attached to the inner side of the cooling tube (33). Several vertical plates (34) are provided. The vertical plates (34) are evenly and equidistantly distributed on the outer side of the cooling tube (33) in a ring array.

4. The anti-loosening, melt-mark-free injection molding device for automotive interior plastic parts according to claim 1, characterized in that: The sealing ring (35) is annular in shape. The outer side of the sealing ring (35) is in contact with the inner side of the injection molding machine tool (1), and the inner side of the sealing ring (35) is in contact with the outer side of the molding cavity tube (31). There are two locking posts (36), which are symmetrically distributed on the upper end of the sealing ring (35).

5. The anti-loosening, melt-mark-free injection molding device for automotive interior plastic parts according to claim 1, characterized in that: One end of the extrusion block (371) is arc-shaped, and a locking post (36) is fixedly connected to the outside of the fixing ring (372). The central axis of the extrusion spring (373) and the central axis of the connecting block (374) are on the same straight line. The lower end of the connecting block (374) is arc-shaped, and the inner side of the inter-block groove (375) is in contact with the outer side of the locking rod (673).

6. The anti-loosening, melt-mark-free injection molding device for automotive interior plastic parts according to claim 1, characterized in that: The bottom end of the outer shell (61) and the bottom end of the injection-molded inner tube (62) are on the same horizontal plane. The bottom end of the injection-molded inner tube (62) is attached to the upper end of the sealing ring (35). The outer side of the nozzle (65) is attached to the inner side of the injection hole (32). One side of the slot (63) is arc-shaped. The inner side of the limiting groove (64) is rotatably connected to the limiting ring (68). Several balls (69) are provided. The balls (69) are evenly and equidistantly distributed in a ring array inside the limiting ring (68).

7. The anti-loosening, melt-mark-free injection molding device for automotive interior plastic parts according to claim 1, characterized in that: The bottom end of the transmission crown tooth (675) is engaged with the driven crown tooth (678). There are two driven crown teeth (678), which are symmetrically distributed inside the protective shell (674). The central axis of the stirring rod (677) and the central axis of the driven crown tooth (678) are on the same straight line.

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