CN114261070A - Preparation system and process of injection molding material for automobile parts - Google Patents

Abstract

The invention belongs to the technical field of automobile parts, and particularly relates to a preparation system and a preparation process of an injection molding material of an automobile part, which comprises a vertical molding machine system, wherein the vertical molding machine system comprises an injection system, a mold system, an oil pressure system, a control system and a mold locking system; the die system comprises an upper die base, a lower die base, a telescopic module and an ejection module; the upper die base is connected with the injection system through an upper mounting plate, and a female die communicated with the feeding channel is arranged on the upper die base; a male die is arranged at the position of the lower die holder corresponding to the female die in the upper die holder; according to the invention, by arranging the ejection module, hydraulic oil is introduced into the oil pressure groove by using an oil pressure system and acts on the push block, so that the ejection rod is ejected out, the ejection rod ejects the molded automobile part out of the male die, the possibility of warping of the molded automobile part is reduced, the rejection rate of the molded automobile part is reduced, and the profit margin is further improved.

Description

Preparation system and process of injection molding material for automobile parts

Technical Field

The invention belongs to the technical field of automobile parts, and particularly relates to a system and a process for preparing an injection molding material for automobile parts.

Background

With the vigorous development of the automobile industry, the usage amount of domestic automobile plastics is increased from 45.5 ten thousand tons in 2005 to 72 ten thousand tons in 2010, 213 ten thousand tons in 2015 and 289 ten thousand tons in 2020, and the automobile plastics in China are entering the rapid development period; the precision, the strength and the like of the engineering plastic products are greatly improved, the application range of the plastic products is wider and wider, and the trend of replacing steel with plastics is shown; according to statistics, the yield of the injection molding products in each year worldwide accounts for about 30% of the total yield of the whole plastic products, and the plastic injection molds produced in each year account for 50% of the total quantity of all the plastic molds; the development of the mold industry has become one of the industries with the fastest technological content increase in the manufacturing industry;

one of the main ways of forming plastic products is injection molding, and the quality of the plastic products is determined by the design and manufacturing quality of the mold; the injection molding processing is a plastic processing method developed according to the metal die-casting molding principle, and an injection molding machine and an injection mold are used for converting raw materials into plastic products; the injection molding processing mainly comprises the factors of polymer, injection molding machinery, a mold, an injection molding process and the like, and the factors are mutually connected and limit the quality of an injection molded product; injection molding is a cyclic process, and each cycle mainly comprises the following steps: quantitative feeding → melting and plasticizing → pressure injection → mold filling and cooling → mold opening and part taking; taking out the plastic part, closing the mold, and transferring to the next cycle;

the injection molding cycle includes four parts: filling time, pressure maintaining time, cooling time and mold opening time; the injection molding machine converts the thermoplastic plastic particle materials into final plastic parts through the circulation of melting, injection, pressure maintaining, cooling and the like; a typical injection molding machine mainly comprises five units, namely an injection system, a mold system, an oil pressure system, a control system, a mold locking system and the like;

the filling process of injection molding is a non-isothermal and non-steady-state flow process of non-Newtonian plastic melt under the action of high pressure, and is accompanied with phase change; the filling process is divided into three stages of filling, pressure maintaining and compensation; the flow of the melt in the pressure maintaining stage is mainly used for compensating the shrinkage of the melt and comprises two stages of compaction and solidification; the compaction stage time is short, the density of the workpiece can change along with the change of pressure, and the temperature change of the melt is not large; the temperature in the curing stage cavity is reduced, and the melt is continuously supplemented under the pressure keeping pressure to compensate for volume shrinkage; the stage from the pouring gate solidification to the product ejection is a cooling stage, heat emitted by molten plastic in the cooling process is taken away by a cooling medium through a mold to be solidified, and the production efficiency and quality of a plastic part are directly influenced by the temperature and uniformity of a mold cavity in the process;

for automobile accessory manufacturers, because of great competition and reduced profit margin, the cost of unit product determines profit, on one hand, a plurality of automobile accessory products are one of products with larger energy consumption, on the other hand, the rejection rate of the automobile accessories in the processing is higher, and therefore, the space for saving energy is larger;

based on the purpose, I know that the reason that the rejection rate of automobile parts is high in the machining process is that the temperature of a plastic part in a mold cavity is uneven, so that the plastic part is not formed according to the designed shape, and the plastic part is warped or warped when being taken;

therefore, the research on how to reduce the warping of the plastic part and reduce the rejection rate of the automobile part is urgently needed by the inventor.

Disclosure of Invention

In order to make up for the defects of the prior art and solve the problems of reducing the warping of a plastic part and reducing the rejection rate of automobile parts, the invention provides a preparation system and a preparation process of an injection molding material for automobile parts.

The technical scheme adopted by the invention for solving the technical problems is as follows: a preparation system of injection molding materials for automobile parts comprises a vertical molding machine system, wherein the vertical molding machine system comprises an injection system, a mold system, an oil pressure system, a control system and a mold locking system; the mold system includes:

the injection molding device comprises an upper die base, an injection system, a lower die base and a lower die base, wherein the upper die base is connected with the injection system through an upper mounting plate, the upper die base and the upper mounting plate are provided with feeding channels, the feeding channels are communicated with the injection system, and the upper die base is provided with a female die communicated with the feeding channels;

the lower die base is provided with a male die at a position corresponding to the female die in the upper die base, sliding grooves are symmetrically arranged on the lower die base along the male die, each sliding groove is internally provided with a sliding rod, and one end of each sliding rod is arranged on the lower mounting plate through a mounting block;

the telescopic module is positioned between the two mounting blocks and connected with the lower die holder, and the male die and the female die are matched through the telescopic module;

the ejection module is controlled to work by the control system and comprises an oil pressure groove arranged on the lower die base, a first groove arranged on the lower die base and the male die, a push block arranged in the oil pressure groove and connected in the oil pressure groove through a spring, and an ejection rod, one end of the ejection rod is connected with the push block, and the other end of the ejection rod is positioned in the first groove; and an oil inlet pipe is arranged on the oil pressure groove on the lower side of the push block and is communicated with an oil pressure system.

Specifically, one end of the ejector rod, which is far away from the push block, is provided with an optical thickness gauge, the optical thickness gauge is electrically connected with the control system, and the optical thickness gauge is used for detecting the thickness of the molding material.

Specifically, a first channel is formed in the middle of the ejection rod and the push block, and one end of the first channel penetrates through the lower die base through a hose and is communicated with an external air source; and a group of spray holes communicated with the first channel are symmetrically formed along the first channel.

Specifically, when the spray holes are located in the first groove, each spray hole is obliquely arranged and faces the male die.

Specifically, a convex die at the ejector rod is provided with a groove, and a paraffin block is arranged in the groove.

Specifically, an annular block with a semicircular section is arranged between the paraffin block and the ejector rod and used for covering a gap between the ejector rod and the first groove.

Specifically, be provided with the helicla flute on the outer lane of ejector pad, and lay on the oil pressure inslot inner wall that is located the ejector pad top with helicla flute assorted ball, and keep away from the spring of ejector pad one end and slide in the ring channel of seting up on the die holder through the slider.

Specifically, a flow velocity sensor is arranged on the feeding channel and communicated with a control system, and the upper mounting plate is symmetrically provided with control modules along the feeding channel; the control module comprises a channel arranged on the upper mounting plate, a movable plate slidably mounted in the channel, a piston plate connected with the movable plate, and an elastic push rod, one end of the elastic push rod is connected with the movable plate, and the other end of the elastic push rod is connected with the control system; the flow area of the feeding channel is adjusted by the mutual matching of the flow velocity sensor and the control system.

Specifically, go up the air flue and No. two air flues that are equipped with respectively on mounting panel and the upper die base with the channel intercommunication, an air flue and outside air supply intercommunication, a port slope of No. two air flues sets up and towards feedstock channel, and is provided with the check valve on No. two air flues.

A preparation process of an injection molding material of an automobile part adopts any one of the preparation systems, and comprises the following steps:

s1: sequentially mixing and melting and plasticizing injection molding materials of automobile parts, pressurizing and injecting the melted and plasticized injection molding materials, and simultaneously, before pressurizing and injecting, realizing the movement of the lower die holder to one side close to the upper die holder through the telescopic module, and realizing the die closing work of the female die and the male die;

s2: feeding the molten and plasticized injection molding material into a space between a female die and a male die through a feeding channel for mold filling, and sequentially carrying out pressure-maintaining cooling;

s3: after pressure maintaining and cooling, ejecting the molded injection molding material through an ejection module to realize demolding and part taking;

s4: and (4) reprocessing the injection molding material which is formed and demoulded to obtain the smooth and flat injection molding material.

The invention has the following beneficial effects:

1. according to the system and the process for preparing the injection molding material for the automobile parts, the ejection module is arranged, hydraulic oil is introduced into the oil pressure groove by the oil pressure system and acts on the push block, so that the ejection rod is ejected out, the ejection rod ejects the molded automobile parts out of the male die, the possibility of warping of the molded automobile parts is reduced, the rejection rate of the molded automobile parts is reduced, and the profit margin is improved.

2. According to the system and the process for preparing the injection molding material of the automobile parts, the thickness of the molding material at different positions is detected by arranging the optical thickness gauge and penetrating the molding material by using an optical principle; and the optical thickness gauge is arranged on the ejection rod, so that the non-uniformity of the injection molding material quantity injected into the molding area after mold closing can be avoided, and the acting force of the ejection module can be controlled according to the detected thickness of the molded automobile part, so as to avoid the breakage of the automobile part when the acting force is too large to cause ejection.

3. According to the system and the process for preparing the injection molding material for the automobile parts, the first channel and the group of spray holes communicated with the first channel are arranged, and the first channel is communicated with an external air source through the hose, so that the automobile parts can be conveniently separated from the male die through the action of air on the automobile parts, and the automobile parts and the male die can be blown and cooled, the temperature of the automobile parts is further reduced, the operation workers can be conveniently taken, the operation workers are prevented from being scalded, and the operation safety is improved.

Drawings

The invention will be further explained with reference to the drawings.

FIG. 1 is a perspective view of the present invention;

FIG. 2 is a partial cross-sectional view of the present invention;

FIG. 3 is an enlarged view of a portion of FIG. 2 at A;

FIG. 4 is an enlarged view of a portion of FIG. 2 at B;

FIG. 5 is an enlarged view of a portion of FIG. 2 at C;

FIG. 6 is a perspective view of a ring block of the present invention;

in the figure: the device comprises an upper die holder 1, an upper mounting plate 11, a feeding channel 12, a female die 13, a lower die holder 2, a male die 21, a sliding rod 22, a mounting block 23, a lower mounting plate 24, a telescopic module 3, an ejection module 4, an oil pressure groove 41, a first groove 42, a push block 43, a spiral groove 431, a ball 432, an ejection rod 44, a first passage 441, a hose 442, a spray hole 443, an annular groove 444, an oil inlet pipe 45, an optical thickness gauge 5, a paraffin block 6, an annular block 7, a control module 8, a channel 81, a first air passage 811, a second air passage 812, a movable plate 82, a piston plate 83 and an elastic push rod 84.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present invention, "a plurality" means two or more unless explicitly defined otherwise as a specific embodiment of the present invention. Furthermore, the terms "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The first embodiment is as follows:

an injection molding material preparation system for automobile parts, as shown in fig. 1-4, comprises a vertical molding machine system, wherein the vertical molding machine system comprises an injection system, a mold system, an oil pressure system, a control system and a mold locking system; the method is characterized in that: the mold system includes:

the injection molding device comprises an upper die holder 1, wherein the upper die holder 1 is connected with an injection system through an upper mounting plate 11, a feeding channel 12 is arranged on the upper die holder 1 and the upper mounting plate 11, the feeding channel 12 is communicated with the injection system, and a female die 13 communicated with the feeding channel 12 is arranged on the upper die holder 1;

the die comprises an upper die base 1, a lower die base 2 and a lower die, wherein a male die 21 is arranged at a position of the lower die base 2 corresponding to a female die 13 in the upper die base 1, sliding grooves are symmetrically formed in the lower die base 2 along the male die 21, a sliding rod 22 is arranged in each sliding groove, and one end of each sliding rod 22 is installed on a lower installation plate 24 through an installation block 23;

the telescopic module 3 is positioned between the two mounting blocks 23, the telescopic module 3 is connected with the lower die holder 2, and the male die 21 and the female die 13 are matched through the telescopic module 3; the telescopic module 3 can adopt a hydraulic cylinder or a telescopic cylinder;

the ejection module 4 is controlled by a control system to work, and the ejection module 4 comprises an oil pressure groove 41 arranged on the lower die holder 2, a first groove 42 arranged on the lower die holder 2 and the punch 21, a push block 43 arranged in the oil pressure groove 41 and connected in the oil pressure groove 41 through a spring, and an ejection rod 44 with one end connected with the push block 43 and the other end positioned in the first groove 42; and an oil inlet pipe 45 is arranged on the oil pressure groove 41 positioned on the lower side of the push block 43, and the oil inlet pipe 45 is communicated with an oil pressure system.

The prior art carries out injection molding after mold closing, after the injection molding is finished, how to take the injection molded automobile parts is not involved, the injection molding material is very attached to the mold during the injection molding, so that the injection molding quality of the injection molded automobile parts is improved, but the more tight the attachment is, the more difficult the molded automobile parts are to be separated from the mold, if the operation is improper, the rejection rate of the molded automobile parts is greatly increased, and in the actual rejection rate check, the most rejection rate is caused by the warping of the automobile parts, the invention utilizes the ejection module 4 to introduce hydraulic oil into the hydraulic groove 41 by utilizing an oil pressure system and act on the push block 43, so that the ejection rod 44 ejects the molded automobile parts out of the male mold 21, thereby reducing the possibility of warping of the molded automobile parts and further reducing the rejection rate of the molded automobile parts, thereby improving the profit margin;

the specific working process is as follows:

firstly, the injection molding materials for forming the automobile parts are sequentially mixed, melted and plasticized, the injection molding materials for the automobile parts are the materials commonly used for the automobile parts on the market, and the injection molding materials for the automobile parts are not the core technology protection points of the application, so that the injection molding materials for the automobile parts are not described in detail;

after the injection molding material is melted and plasticized, pressurizing and injecting the injection molding material to enable the injection molding material to enter a mold system after mold closing through the feeding channel 12; before the injection molding material which is melted and plasticized is pressurized and injected, the telescopic module 3 is controlled to work through the control system, the telescopic module 3 drives the lower die holder 2 to move towards one side close to the upper die holder 1, so that the female die 13 on the upper die holder 1 and the male die 21 on the lower die holder 2 are combined together, the die assembly work is realized, when the male die 21 moves towards one side of the female die 13 and the male die 21 enters the female die 13, air in the female die 13 can be extruded out along a forming area of the injection molding material reserved between the female die 13 and the male die 21, and excessive air is prevented from existing in the die assembly;

after the die 13 and the male die 21 are closed, the melted and plasticized injection molding material is injected under pressure and enters a molding area of the injection molding material reserved between the female die 13 and the male die 21 along the feeding channel 12, and air can be extruded due to the fact that the melted and plasticized injection molding material flows from top to bottom;

after the melted and plasticized injection molding material is filled, sequentially carrying out pressure maintaining cooling to realize the shaping of the injection molding material; after the injection molding material is shaped, namely the corresponding automobile part, the control system controls the telescopic module 3 to drive the lower die holder 2 to move towards one side far away from the upper die holder 1, the male die 21 is separated from the female die 13, and the formed automobile part is remained on the male die 21, at the moment, the control system controls the oil pressure system, hydraulic oil is introduced into the oil pressure groove 41 and acts on the push block 43 to realize ejection of the ejection rod 44, so that the formed automobile part is ejected out of the male die 21, the phenomenon that the formed automobile part is warped when the formed automobile part is taken away from the male die 21 due to different skills or proficiency of different operators is avoided, and the rejection rate of the automobile part is improved, so that the profit margin is greatly improved;

according to the operation, the batch production of the automobile parts is realized by repeating the operation repeatedly, and in addition, the ejected automobile parts need to be reprocessed, so that the smooth and flat automobile parts are obtained.

Example two:

a difference from the first embodiment is that, as shown in fig. 4, an optical thickness gauge 5 is disposed at an end of the ejector rod 44 away from the push block 43, the optical thickness gauge 5 is electrically connected to a control system, and the optical thickness gauge 5 is used for detecting the thickness of the molding material;

the thickness of the molding material is detected by arranging an optical thickness gauge 5 and penetrating the molding material by using an optical principle;

in addition, the optical thickness gauge 5 is arranged on the ejection rod 44, so that the non-uniformity of the injection molding material quantity injected into the molding area after mold closing can be avoided, and the acting force of the ejection module 4 can be controlled according to the detected thickness of the molded automobile part, so as to avoid the fracture of the automobile part when the automobile part is ejected due to the overlarge acting force;

the specific working process is as follows:

the difference from the specific working process of the first embodiment is that before the molten and plasticized injection molding material is injected into the mold clamping area under pressure, the control system controls the optical thickness gauge 5 to work so as to ensure the uniformity of the injection molding material in the mold clamping area; after the injection molding of the automobile parts is finished, the thickness of the molded automobile parts is detected by using the optical thickness gauge 5, so that the ejection force of the ejection rod 44 is controlled, the breakage of the automobile parts caused by the consistent ejection force due to different thicknesses is avoided, and the rejection rate of the automobile parts is increased;

when the optical thickness gauge 5 detects that the thickness of the automobile part is thinner relative to the position of the ejection rod 44, the optical thickness gauge 5 feeds back the detected numerical information to the control system, and the control system controls the oil pressure system, so that the acting force of the ejection rod 44 on the automobile part is reduced;

when the optical thickness gauge 5 detects that the thickness of the automobile part at the position corresponding to the ejection rod 44 is thick, the optical thickness gauge 5 feeds back the detected numerical information to the control system, and the control system controls the oil pressure system, so that the acting force of the ejection rod 44 on the automobile part is increased, and the automobile part is ejected quickly;

example three:

a difference from the first embodiment is that, as shown in fig. 2-4, a first channel 441 is formed in the middle of the ejector rod 44 and the push block 43, and one end of the first channel 441 penetrates through the lower die base 2 through a hose 442 and is communicated with an external air source; a group of jet holes 443 communicated with the first channel 441 are symmetrically formed along the first channel 441;

when the injection holes 443 are positioned in the groove number one 42, each injection hole 443 is obliquely arranged and faces the punch 21;

by arranging the first channel 441 and the group of spray holes 443 communicated with the first channel 441, and communicating the first channel 441 with an external air source through the hose 442, on one hand, the automobile parts can be conveniently separated from the male die 21 by acting on the automobile parts through air, on the other hand, the automobile parts and the male die 21 can be blown, the automobile parts can be cooled, the temperature of the automobile parts is further reduced, the operation workers can be conveniently taken, the operation workers can be prevented from being scalded, and therefore the operation safety is improved;

in addition, when the injection holes 443 are positioned in the first groove 42, each injection hole 443 is obliquely arranged and faces the male die 21, when the injection holes 443 are separated from the first groove 42, the gas injected from the injection holes 443 better acts on the automobile parts, and the gas acts on the male die 21 in a reverse direction under the blockage of the automobile parts, so that the blowing of the male die 21 is realized, the separation of the automobile parts is facilitated, and the temperatures of the automobile parts and the male die 21 can be further reduced;

the specific working process is as follows:

the difference from the specific working process of the first embodiment is that when the control system controls the oil pressure system to introduce hydraulic oil into the oil pressure tank 41 and act on the push block 43, the ejector rod 44 is ejected out, so that a group of injection holes 443 formed in the ejector rod 44 are separated from the blocking of the inner wall of the first groove 42, meanwhile, an external air source enters the first channel 441 through the hose 442 and is ejected out along the injection holes 443 to act on the automobile parts, thereby further cooling and ejecting the automobile parts, and the injection holes 443 are symmetrically arranged along the first channel 441, so that the air ejected from the injection holes 443 simultaneously acts on the positions of the automobile parts on both sides of the ejector rod 44, so that the acting force applied to the automobile parts is the same, the separation of the automobile parts from the ejector rod 44 is facilitated, and the quality of the automobile parts is ensured.

Example four:

the difference from the third embodiment is that, as shown in fig. 2, 4 and 6, a concave groove is formed on the male die 21 at the ejector rod 44, and a paraffin block 6 is arranged in the concave groove;

an annular block 7 with a semicircular section is arranged between the paraffin block 6 and the ejector rod 44, and the annular block 7 is used for covering a gap between the ejector rod 44 and the first groove 42;

by arranging the paraffin block 6, the injection molding material which is melted and plasticized can be prevented from being tightly attached to the ejector rod 44, so that the molded automobile parts are not easy to separate from the ejector rod 44, and the rejection rate of the automobile parts is prevented from being improved;

secondly, based on the self characteristics of the paraffin block 6, under the influence of the melted and plasticized injection molding material, the paraffin block 6 is melted, and the melted paraffin block 6 is still positioned at the groove position, so that the injection molding material is still positioned at the upper side of the melted paraffin block 6, the thickness value of the automobile accessory formed at the groove position is prevented from being higher than other positions, the uniformity of the thickness of the automobile accessory is ensured, the acting force for ejecting the automobile accessory is convenient to adjust subsequently, meanwhile, the existence of the paraffin block 6 has a buffering effect on the ejection of the ejection rod 44 on the automobile accessory, and the rejection rate of the automobile accessory is further reduced;

in addition, if the paraffin blocks 6 in the grooves are completely melted, the annular block 7 further prevents the melted paraffin blocks 6 from entering a gap between the ejection rod 44 and the first groove 42, so that on one hand, the ejection rod 44 is not used for ejecting the paraffin blocks 6 after the paraffin blocks 6 entering the gap between the ejection rod 44 and the first groove 42 are cooled and shaped, and on the other hand, the melted paraffin blocks 6 enter the gap between the first groove 42 and the ejection rod 44, so that the volume of the paraffin blocks 6 in the grooves is reduced, injection molding materials can enter the grooves, the thickness of molded automobile parts is uneven, the molding quality of the automobile parts is improved, the increase of the rejection rate of the automobile parts due to warping is reduced, and the profit margin is improved;

the specific working process is as follows:

different from the specific work flow of the third embodiment, when the melted and plasticized injection molding material is injected into the molded area after mold closing, the paraffin block 6 will melt based on the characteristics of the paraffin block 6, but the injection molding material is still positioned on the upper side of the melted paraffin block 6, so that the injection molding material is ensured not to enter the groove area, and the thickness uniformity of the molded automobile part is ensured; when the material of moulding plastics carries out the pressurize cooling, paraffin block 6 solidifies, acts on ejecting with auto-parts at knock-out lever 44, plays the cushioning effect, protects auto-parts, and simultaneously, paraffin block 6's existence, realization that also can be fine and auto-parts's separation to further reduce auto-parts's disability rate, improve its profit margin.

Example five:

the difference from the fourth embodiment is that, as shown in fig. 2-3, a spiral groove 431 is provided on the outer ring of the push block 43, a ball 432 matched with the spiral groove 431 is disposed on the inner wall of the oil pressure groove 41 above the push block 43, and a spring at one end far away from the push block 43 slides in an annular groove 444 provided on the lower die base 2 through a slider;

through the arrangement of the spiral groove 431 and the ball 432, the ejector rod 44 is enabled to rotate and eject upwards, so that damage to automobile accessories due to quick ejection of the ejector rod 44 can be avoided, the automobile accessories can be well separated from the ejector rod 44, the rejection rate of the automobile accessories is reduced, and the profit margin of the automobile accessories is improved;

the specific working process is as follows:

the difference from the fourth specific working flow of the embodiment lies in that when the control system controls the oil pressure system to introduce hydraulic oil into the oil pressure groove 41 and act on the pushing block 43, because the spiral groove 431 is arranged on the outer ring of the pushing block 43, and the ball 432 matched with the spiral groove 431 is arranged on the inner wall of the oil pressure groove 41 above the pushing block 43, the pushing block 43 can move upwards while rotating, and meanwhile, because the ball 432 and the spiral groove 431 are lubricated, the abrasion of the ball 432 is avoided, the service life of the automobile parts is prolonged, the rejection rate of the automobile parts is reduced, and the profit margin of the automobile parts is improved.

Example six:

the difference from the fifth embodiment is that, as shown in fig. 2 and 5, a flow rate sensor is arranged on the feeding channel 12, the flow rate sensor is communicated with a control system, and the control modules 8 are symmetrically arranged on the upper mounting plate 11 along the feeding channel 12; the control module 8 comprises a channel 81 formed on the upper mounting plate 11, a movable plate 82 slidably mounted in the channel 81, a piston plate 83 connected with the movable plate 82, and an elastic pushing rod 84 with one end connected with the movable plate 82 and the other end connected with a control system; the flow area of the feeding channel 12 is adjusted through the mutual matching of the flow velocity sensor and the control system;

the upper mounting plate 11 and the upper die base 1 are respectively provided with a first air passage 811 and a second air passage 812 which are communicated with the channel 81, the first air passage 811 is communicated with an external air source, one port of the second air passage 812 is obliquely arranged and faces the feeding channel 12, and the second air passage 812 is provided with a one-way control valve;

by arranging the control module 8 and the flow velocity sensor, the injection flow velocity of the injection molding material is monitored by the flow velocity sensor and fed back to the control system, and the control module 8 is controlled by the control system to work, so that the overflow of the injection molding material caused by overlarge flow at the end of injection molding is avoided, and the waste of the injection molding material is avoided;

in addition, the control module 8 is matched with the first air passage 811 and the second air passage 812, the one-way control valve is controlled to be opened, an external air source is sprayed out along the second air passage 812 to cool the injection molding material, the cooling rate of the injection molding material is further improved, and meanwhile, the injection molding material is further uniformly cooled, so that the injection molding material is molded according to the designed shape, the warping of the injection molding material is avoided, the rejection rate of automobile parts is reduced, and the profit margin of the automobile parts is further improved;

the specific working process is as follows:

the difference from the fifth embodiment of the specific working process lies in that when the molten and plasticized injection molding material is pressurized and injected and enters the molding area after mold closing along the feeding channel 12, the injection flow rate of the injection molding material is monitored in real time by the flow rate sensor, and at the end of injection molding, the flow rate sensor feeds back the monitored value to the control system, and acts on the control module 8, so that the elastic push rod 84 moves to one side close to the lower mold base 2, and the movable plate 82 moves in the channel 81, so that the two piston plates 83 move to one side close to each other, and the semi-annular notches on the end parts of the two piston plates 83 close to each other are contacted to form a notch, thereby reducing the flow rate area of the feeding channel 12, effectively reducing the speed and limiting the flow of the injection molding material, and avoiding overflow of the injection molding material and waste of the injection material;

in addition, when the elastic pushing plate pushes the movable plate 82 to move towards the side close to the feeding channel 12, the channel 81 is communicated with the air channel 811, and the air channel 811 is communicated with an external air source, so that air is pumped into the channel 81, the movable plate 82 is blocked, the movable plate 82 is prevented from moving, the purpose of limiting the flow of the injection molding material is lost, meanwhile, after the injection molding material is introduced and finished, and pressure maintaining cooling is performed, the one-way control valve is controlled to be opened, the air in the channel 81 on one side of the movable plate 82 acts on the molded injection molding material through the air channel 812, and the injection molding material is further cooled, so that the cooling uniformity of the injection molding material is improved, the rejection rate of automobile accessories is reduced, and the profit rate of the automobile accessories is improved.

A preparation process of an injection molding material of an automobile part adopts any one of the preparation systems, and comprises the following steps:

s1: sequentially mixing and melting and plasticizing injection molding materials of automobile parts, pressurizing and injecting the melted and plasticized injection molding materials, and simultaneously, before pressurizing and injecting, realizing the movement of the lower die holder 2 to one side close to the upper die holder 1 through the telescopic module 3, and realizing the die closing work of the female die 13 and the male die 21;

s2: feeding the molten and plasticized injection molding material into a space between the female die 13 and the male die 21 through the feeding channel 12 for mold filling, and sequentially carrying out pressure maintaining and cooling;

s3: after pressure maintaining and cooling, the molded injection molding material is ejected through the ejection module 4, so that demolding and taking are realized;

s4: and (4) reprocessing the injection molding material which is formed and demoulded to obtain the smooth and flat injection molding material.

The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims (10)

1. A preparation system of injection molding materials for automobile parts comprises a vertical molding machine system, wherein the vertical molding machine system comprises an injection system, a mold system, an oil pressure system, a control system and a mold locking system; the method is characterized in that: the mold system includes:

the injection molding device comprises an upper die holder (1), wherein the upper die holder (1) is connected with an injection system through an upper mounting plate (11), the upper die holder (1) and the upper mounting plate (11) are provided with a feeding channel (12), the feeding channel (12) is communicated with the injection system, and a female die (13) communicated with the feeding channel (12) is arranged on the upper die holder (1);

the die comprises a lower die holder (2), wherein a male die (21) is arranged at a position of the lower die holder (2) corresponding to a female die (13) in an upper die holder (1), sliding grooves are symmetrically formed in the lower die holder (2) along the male die (21), a sliding rod (22) is arranged in each sliding groove, and one end of each sliding rod (22) is mounted on a lower mounting plate (24) through a mounting block (23);

the telescopic module (3) is positioned between the two mounting blocks (23), the telescopic module (3) is connected with the lower die holder (2), and the male die (21) and the female die (13) are matched through the telescopic module (3);

the ejection module (4) is controlled to work by a control system, the ejection module (4) comprises an oil pressure groove (41) formed in the lower die holder (2), a first groove (42) formed in the lower die holder (2) and the male die (21), a push block (43) arranged in the oil pressure groove (41) and connected into the oil pressure groove (41) through a spring, and an ejection rod (44) with one end connected with the push block (43) and the other end positioned in the first groove (42); and an oil inlet pipe (45) is arranged on the oil pressure groove (41) positioned on the lower side of the push block (43), and the oil inlet pipe (45) is communicated with an oil pressure system.

2. The system for preparing injection molding material for automobile parts according to claim 1, wherein: an optical thickness gauge (5) is arranged at one end, far away from the ejector rod (44) of the push block (43), of the ejector rod, the optical thickness gauge (5) is electrically connected with the control system, and the optical thickness gauge (5) is used for detecting the thickness of the molding material.

3. The system for preparing injection molding material for automobile parts according to claim 1, wherein: a first channel (441) is formed in the middle of the ejection rod (44) and the push block (43), and one end of the first channel (441) penetrates through the lower die base (2) through a hose (442) and is communicated with an external air source; a group of spray holes (443) communicated with the first channel (441) are symmetrically formed along the first channel (441).

4. The system for preparing injection molding material for automobile parts according to claim 3, wherein: when the jet holes (443) are at the position of the groove I (42), each jet hole (443) is obliquely arranged and faces the punch (21).

5. The system for preparing injection molding material for automobile parts according to claim 3, wherein: a groove is formed in the male die (21) located at the ejector rod (44), and a paraffin block (6) is arranged in the groove.

6. The system for preparing injection molding material for automobile parts according to claim 5, wherein: and an annular block (7) with a semicircular section is arranged between the paraffin block (6) and the ejector rod (44), and the annular block (7) is used for covering a gap between the ejector rod (44) and the first groove (42).

7. The system for preparing injection molding material for automobile parts according to claim 3, wherein: the outer ring of the push block (43) is provided with a spiral groove (431), the inner wall of the oil pressure groove (41) above the push block (43) is provided with a ball (432) matched with the spiral groove (431), and a spring at one end far away from the push block (43) slides in an annular groove arranged on the lower die holder (2) through a sliding block.

8. The system for preparing injection molding material for automobile parts according to claim 1, wherein: a flow velocity sensor is arranged on the feeding channel (12), the flow velocity sensor is communicated with a control system, and the upper mounting plate (11) is symmetrically provided with control modules (8) along the feeding channel (12); the control module (8) comprises a channel (81) arranged on the upper mounting plate (11), a movable plate (82) slidably mounted in the channel (81), a piston plate (83) connected with the movable plate (82), and an elastic pushing rod (84) with one end connected with the movable plate (82) and the other end connected with a control system; the flow area of the feeding channel (12) is adjusted by the mutual matching of the flow rate sensor and the control system.

9. The system for preparing injection molding material for automobile parts according to claim 8, wherein: go up mounting panel (11) and be equipped with respectively on upper die base (1) with air flue (811) and No. two air flues (812) of channel (81) intercommunication, air flue (811) and outside air supply intercommunication, a port slope of No. two air flues (812) sets up and towards feedstock channel (12), and is provided with the check valve on No. two air flues (812).

10. A preparation process of an injection molding material for automobile parts is characterized by comprising the following steps: the injection molding material preparation process adopts the preparation system of any one of claims 1 to 9, and comprises the following steps:

s1: the injection molding material of the automobile parts is sequentially mixed, melted and plasticized, the melted and plasticized injection molding material is subjected to pressure injection, and meanwhile, before the pressure injection, the lower die holder (2) moves to one side close to the upper die holder (1) through the telescopic module (3), so that the die assembly work of the female die (13) and the male die (21) is realized;

s2: feeding the molten and plasticized injection molding material into a space between a female die (13) and a male die (21) through a feeding channel (12) for mold filling, and sequentially carrying out pressure maintaining and cooling;

s3: after pressure maintaining and cooling, the molded injection molding material is ejected through an ejection module (4), so that demolding and taking are realized;

s4: and (4) reprocessing the injection molding material which is formed and demoulded to obtain the smooth and flat injection molding material.

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