KR102005014B1 - Pre-compression injection machine - Google Patents

Abstract

The present invention is used in the processing of injection molded products, and in particular, in a pre-molded injection molding machine including an injection molding machine main body for molding and molding a processing atmospheric injection molding product having a complicated structural form, the processing atmospheric injection molding A diehead used for making the first stage molding of the article and for producing blanks; Disclosed is a premolded injection molding machine further comprising a pretreatment structure including a compression molding machine for the manufacture of molding preforms. Through the installation of the pre-treatment structure, integrated processing molding can be realized for injection molding products of complex structure type, and the complicated structure type injection molding product under common circumstances solved the trouble of processing and transporting in different equipment by dividing the order. Due to different combination ratios of different equipment, it also prevents inadequate post-inconsistency of the resulting product structure strength; This greatly improves the processing efficiency of complex injection molding products.

Description

Pre-molded Injection Molding Machine {PRE-COMPRESSION INJECTION MACHINE}

FIELD OF THE INVENTION The present invention relates to the field of injection molding machines, specifically referring to premold injection molding machines.

Composite reinforced fiber is a typical high-performance fiber material with a series of superior performances such as high ratio strength, high ratio coefficient, high temperature resistance, corrosion resistance, fatigue resistance, yield radiation, conductivity, heat transfer, and relatively low density. Composite reinforcing fiber is applied to injection molding products to increase the structural strength of injection molding products. However, there are mainly four types of application of mature mature reinforced fiber. The first method is to cut the composite reinforced fiber pieces soaked in the grass by the manual pressure layer method to form a layer or to build a layer by further heating and compressing the resin. Low efficiency The second method is the method of winding the composite reinforced fiber yarn around the fiber shaft by the rotational molding method. This method is applied only to the cylindrical and hollow core containers and has low production efficiency. Thirdly, the compression molding method is a method in which a composite reinforced fiber in which resin is pre-soaked is put into a metal model to apply pressure to remove the remaining paste, and then solidified and molded at a high temperature. Likewise, production efficiency is low and structural parts cannot be manufactured. Fourth, the long fiber raw material injection molding method is a method of pre-treatment of composite reinforced fiber into raw material and then injection molding through injection molding machine. Although this method solves the production efficiency problem, the fiber with relatively long fiber length is screwed in the injection molding machine. Under cutting and heating of the shaft and hot runner, only 30% of finished products with fiber length of more than 5mm greatly reduced the strength of the finished product.

As some injection molded products have complicated structural forms, the primary injection molding cannot be realized. Therefore, complicated injection molded products need to double the processing difficulty in order to meet the demand for high strength during production processing.

Adding composite mineral fiber is a very necessary means to improve the strength of injection molded products. However, at the same time, the strength of the composite reinforced fiber material itself is susceptible to damage at high temperatures when processing the composite reinforced fiber material, and the fiber length and the intricate complexity of the finished product affect the strength of the finished product.

Therefore, it is very necessary to design the equipment that can satisfy the high strength requirements of injection molded products and at the same time realize the integrated processing of injection molded products with complex structural forms and satisfy the efficiency requirements of industrial mass production. will be.

The creator of the present invention with reference to the above defects obtained the present invention through a long time research and practice.

Some injection molded products are complicated in structure, so they cannot be injection molded once and have to go through various procedures. Satisfying high strength requirements when producing products with complex structures adds to the complexity of machining.

In order to increase the strength of injection molded products, it is essential to inject composite reinforced fiber. In addition, the original strength of the composite reinforcing fiber when processing the composite reinforcing fiber material will be affected by the high temperature damage and will affect the strength of the molded article depending on the length of the fiber and the degree of complexity in the manufacturing process.

Therefore, it is necessary to produce equipment that satisfies the high strength of injection molded products, realizes the integrated processing of injection molded products with complex structures, and satisfies the industrialized large-scale production rate.

Technical solutions taken by the present invention to solve the above technical defects are as follows. In the pre-molding injection molding machine which is used for the processing of injection molded products, in particular, the molding process for the processing atmospheric injection molding product having a complicated structural form and including the injection molding machine main body for molding molding, A die head used to proceed first stage molding and for blank production; It provides a pre-molded injection molding machine further comprising a pretreatment structure including a compression molding machine for the production of molding pre-molded product.

Preferably, the pretreatment structure is connected to the injection molding machine body through a directional valve, and the injection molding melt is changed into the pretreatment structure and the storage spray switching structure by changing the direction of the flow of the injection molding melt by switching the directional valve. It realizes the change of direction of the flow between.

Preferably, the pretreatment structure further comprises a cutting device for cutting the continuous blank into an independent blank.

Preferably, the pretreatment structure further comprises a transition mechanism for moving the blank and the molding preform to a subsequent structure.

Preferably, the type of transition mechanism comprises a conveyor belt and a money plate.

Preferably, the pretreatment structure is subjected to pretreatment for the injection molded product, and then transferred by the transfer mechanism into the injection molding machine clamping device installed in the premold injection molding machine to perform molding molding.

Preferably, the pretreatment structure is subjected to pretreatment for the injection molded article, and then transferred to other mechanisms by the transfer mechanism for subsequent processing.

Preferably, when the pre-mold injection molding machine is processing the injection molded product, the pre-molding process is carried out directly to the injection molding machine clamping device, without performing the pre-treatment for the injection molded product through the pretreatment structure.

Preferably, the pre-molding injection molding machine includes a first extruder having a first material inlet, the pre-molding injection molding machine further comprises a second extruder having a second material inlet, the second extruder Is in a downstream position of the first extruder.

Compared with the prior art, the advantageous effects of the present invention are as follows.

1. Through the installation of the pretreatment structure, it is possible to realize the integrated process molding for the injection molded product of the complicated structure type, so that the injection molded product of the complicated structure type should be processed and transferred in different equipment under the general circumstances. This eliminates the hassle and prevents inconsistent product structural strength caused by different combination ratios of different equipment, greatly improving the processing efficiency for complex injection molding products.

2. If the injection molding melt is continuously spilled in the compounding structure, if only two corresponding procedures of storing at the injection and non-injection stages are inevitably, the production efficiency is greatly reduced. The pre-molding injection molding machine introduces the pretreatment structural unit under the premise that it does not affect the injection process, and performs the normal injection procedure on the one hand, and also performs the pre-treatment for the injection molded product to realize simultaneous compression molding and injection molding. Significantly improved the utilization of equipment over time. This solved the problem of low utilization rate of equipment that uses different compounding structure and then press molding and injection molding separately in general production of equipment. Combining through the same compounding structure, compression molding and injection molding are processed separately. In this case, the use of a single extruder was relatively reduced, thereby lowering the cost of equipment and ensuring consistency of the mixing method.

3. By adopting twin extruder structure, professionally designed extruder for textile material to process and process fiber material and filler material through different extruders to secure maximum length after cutting of fiber material and minimize damage of high temperature . Taking the twin extruded mixing structure can widen the adjustment range of the product processing process and realize different rotation speeds to satisfy the melting of the raw material and the mixing of the fiber material and the molten material. The strength of the fiber material itself is susceptible to damage at high temperatures when processing the fiber material and the length of the fiber and the degree of intricate complexity in the finished product affects the strength of the finished product. It reduces the time the fiber material is damaged at high temperature during the compounding process, lowers the temperature that the fiber material receives during the compounding process, reduces the cutting time of the fiber material during the compounding process, and takes the specific screw type. Increasing the form of cutting increases the length of the finished product of the fiber.

BRIEF DESCRIPTION OF DRAWINGS To describe the technical solutions in the embodiments of the present invention more clearly, the drawings to be used in the description of the embodiments will be briefly introduced.
1 is a diagram illustrating the equipment of the present invention.
2 is a diagram illustrating the equipment of the present invention.
3 is a diagram illustrating the equipment of the present invention.
4 is an explanatory view of the storage spray structure of the present invention.
5 is a cross-sectional explanatory view of a front view of the buffer latex storage cylinder of the present invention.
Figure 6 is a cross-sectional explanatory view of the right side buffer buffer storage cylinder of the present invention.
7 is an explanatory cross-sectional view of the storage injection gate valve and the injection gate valve of the present invention.
8 is an explanatory cross-sectional view of the storage injection gate valve and the injection gate valve of the present invention.
9 is an explanatory cross-sectional view of the storage injection gate valve and the injection gate valve of the present invention.

Combining the drawings to describe the above-described technical features and other technical features and advantages of the present invention in more detail.

Pre-molding injection molding machine, used for processing injection molded products, especially molding process processing for complex injection molding products, compounding structure, storage spray conversion structure, injection molding structure, injection molding machine clamping device, pretreatment structure It includes.

Example 1

The difference between the above-described pre-molded injection molding machine and the present embodiment is that the compounding structure is used to cut and melt the different types of processing atmospheric materials.

The processing standby material includes fibers and raw materials, the length of the fibers includes continuous fibers and short fibers, and the fibers include carbon fibers.

The compounding structure includes one motor 23 and one extruder 1. The motor 23 is used to power the compounding process. The output shaft of the motor 23 is connected to the import end of one reducer and the output end of the reducer is connected to the extruder 1. One screw assembly is installed in the extruder 1, and the screw assembly rotates in the axial direction under the guidance of the reducer. The screw assembly is composed of at least one screw and a minimum helix is installed on the screw, and when the processing material moves along the direction in which the helix is advanced, a helix of various types is installed and a variety of types Combination of spirals is more advantageous for cutting against the processing air. At least two through holes are left on the extruder 1, which includes a first through hole 8 and a second through hole 10. The first charge through hole 8 is used to feed the raw material and the second charge through hole 10 is used to connect with the fiber material feeding device 7 and to feed the fiber material, at least one of the second The charge through hole 10 should be in the downward position of the first charge through hole 8.

The motor 23 drives the speed reducer as a power output device. The reducer leads the screw assembly to rotate in the same direction as the axis through the deceleration test of the internal structure. The screw assembly naturally cuts the raw material and melts it under the action of one heating device. The fiber material forms a piece of fiber under the cutting action of the screw assembly. The fiber pieces are mixed with the prescription material in a molten state to form an injection molding melt, and the injection molding melt is transferred to a downward unit under the action of the driving force generated when the screw rotates. Joining the continuous fiber from the corresponding distal end of the speed reducer to reduce the cutting and melting time of the continuous fiber to ensure a sufficient length of the fiber piece.

The fibrous material and the raw material are respectively introduced into the compounding structure, but the input position of the fibrous material should be a downward position of the raw material. Cutting and heating time of the fiber material can be reduced to avoid breaking the strength of the fiber material due to excessive cutting and melting. Therefore, the length of the fiber pieces formed after the cutting of the fiber material is longer, and the ratio of the fiber pieces of 5 mm or more is greater so that the finished product after injection molding has a relatively long heating and cutting time for the continuous fiber in terms of tensile strength and anti-impact strength. Compared to all greatly improved.

Example 2

As can be seen from FIG. 1, the above-described pre-mold injection molding machine is different from the present embodiment, the storage injection switching structure includes a material storage cylinder (3), a storage injection hydraulic cylinder, a storage injection gate valve (12). .

Since the compounding structure is a continuous material supply state during operation, the injection molding melt is continuously extruded continuously. However, since the injection structure is an intermittent working state, there is both injection and compression time in each molding cycle. Therefore, by installing one temporary storage space in the continuously injection technology injection molding melt continuously flows when the injection molding melt is continuously supplied from the compound structure to prevent equipment clogging and continuous of the compound structure The material supply can be realized to improve the production rate. The buffer material storage cylinder (3) is used to install a temporary storage space in the injection molding melt and the heating device is further installed on the outside of the buffer material storage cylinder (3) is continuously heated to the injection molding melt It is used to keep the injection molded melt in a continuous melt state.

The storage spray hydraulic cylinder is used to provide power to the buffer material storage cylinder (3), and the storage spray hydraulic cylinder is provided with two hydraulic cylinder bodies symmetrically on both sides of the buffer material storage cylinder (3) to symmetric bi-hydraulic cylinder. The form of installation was taken. Therefore, the height of the equipment is lowered to make the structure tighter, and the symmetrically installed storage valve bar is more stable in structure to receive the force, so that the storage injection hydraulic cylinder and the buffer material storage cylinder are not evenly applied to the force, thereby reducing the use damage. Extends life

The storage injection gate valve 12 is used for the injection molding melt to realize the switching between the material storage state and the material injection state. When the injection molding melt flows into the injection structure, the storage injection gate valve 12 conducts a passage between the compounding structure and the injection structure and at the same time conducts a passage between the storage injection switching structure and the injection structure to allow the injection. Molding melt flows into the injection cylinder 2 simultaneously with the buffer material storage cylinder 3 and the extruder 1. When the injection molding melt flows into the storage spray switching structure, the storage spray gate valve 12 moves and conducts a passage between the compounding structure and the storage spray switching structure, thereby causing the injection molding melt to flow into the storage spray hydraulic cylinder. Under the action to flow into the buffer material storage cylinder 3, wherein the passage to the injection cylinder 2 is cut.

After the injection molding melt fills the injection cylinder 2, it flows upward into the buffer material storage cylinder 3 to perform temporary material storage. If the injection structure is completed injection, the injection molding melt transferred from the compounding structure flows into the injection cylinder 2 and the injection molding melt stored in the buffer material storage cylinder 3 is pressurized by the storage injection hydraulic cylinder. The same flows into the injection cylinder 2 under action.

The storage spray conversion structure provides a temporary storage space for the injection molding melt continuously supplied from the compounding structure, greatly increasing the production efficiency during industrial production, and repeatedly stopping the operation to prevent the equipment from being damaged. Repeated heating of the molding melt prevents wasting energy.

Example 3

The above-mentioned pre-molded injection molding machine is different from the present embodiment in that the injection structure is for completing the injection process of the injection molding melt, and includes an injection cylinder 2, an injection rod and an injection gate valve 14. The injection cylinder 2 is used to store a certain amount of the injection molding melt, and after the injection molding melt injected into the injection cylinder 2 reaches the set amount, the storage injection gate valve 12 is the injection molding The flow of melt is stopped and the injection rod propels the injection molded melt through the injection gate valve 14.

The injection rod is installed inside the injection cylinder 2 and the outer size of the injection rod coincides with the interval of the inner edge of the injection cylinder 2.

The injection gate valve 14 opens during injection, closes during material storage, and has a high melt pressure during material storage to prevent the melt from being ejected from the injection hole to affect melt molding.

Example 4

As can be seen from FIG. 1, the above-mentioned pre-molded injection molding machine is different from the present embodiment, the injection molding machine clamping device 5 is used to fix the mold and one end of the injection molding machine clamping device 5 is In coordination with the injection structure, compression molding is performed on the injection molding melt that has been injected. The injection molding machine clamping device 5 provides the clamping force to the mold when the injection structure proceeds to injection so that the injection molding melt is fixedly molded.

Example 5

The above-mentioned premolded injection molding machine is different from the present embodiment in that the premolded injection molding machine further includes a pretreatment structure, which is used to perform the first step processing on the injection molded melt. The pretreatment structure includes a die head 18, a cutting device 9, a transition mechanism, a compression molding machine 4.

The pre-molding injection molding machine is provided with a diverting valve 13, which is located in a direction downstream passage of the flow of the injection molding melt extruded from the compounding structure. When the injection molding melt constantly flows out of the compounding structure, the flow direction of the injection molding melt is changed by cutting the directional valve 13. When the directional valve 13 guides the injection molded melt to the pretreatment structure, the injection molded melt is injected into the die head 18 and the pre-mode gate valve 11 is adjusted so that the injection molded melt The flow rate and volume flowing into the die head 18 is controlled. After a certain amount of the injection molding melt is injected into the die head 18, the pre-mode gate valve 11 is cut to stop the injection of the injection molding melt, and the injection molding melt is first inserted into the die head 18. Step molding is performed to form the blanks 17 and the blanks 17 are cut into one independent blank through the cutting device 9.

The blank 17 is transferred to the compression molding machine 4 through the transition mechanism, and the blank 17 is compressed in the compression molding machine 4 to form a molding pre-molded product 15. (15) is transferred into the injection molding machine clamping device (5). When one end of the injection molding machine clamping device 5 is connected to the injection molding device and the molding pre-molded product 15 is placed inside the injection molding machine clamping device 5, the injection molding melt is transferred through the injection molding device. The injection molding machine clamping device (5) is injected into the molding pre-molded product 15 to perform secondary molding.

The transition mechanism may include a mechanism such as a conveyor belt 6, money plater 1 19, money plater 2 20, and the like.

Through the installation of the pretreatment structure, the integrated molding process can be performed on the injection molded product of a complicated structure type, and solves the trouble of having to process and transport the complicated structure type injection molded product by dividing the order under different circumstances. It prevented the defective post-inconsistency that the product structure strength was inconsistent due to the difference in the distribution ratio of different equipments, and greatly improved the processing efficiency for the injection molded products of complex structure type.

The pretreatment structure is provided in a passage between the compounding structure and the storage spray switching structure. The pretreatment structure may be provided between the storage spray conversion structure and the injection structure.

The pretreatment structure can be adjusted via the divert valve 13 and the injection molded melt can realize a change in direction of flow between the pretreatment structure and the storage spray divert structure. When the injection molding melt is constantly flowing out of the compounding structure, if only two procedures of storing in the injection and non-injection stages are performed, it will inevitably decrease the production efficiency. The pre-molding injection molding machine adopts the pretreatment structure unit under the premise that it does not affect the injection process, and performs the normal injection procedure and the pretreatment for the injection molded product, and simultaneously performs the compression molding and the injection molding. It greatly improves the utilization of equipment over time. This solved the problem of low utilization rate of equipment that needs to be compounded through different compounding structure in the production of general equipment, and then compression molding and injection molding respectively, and process compression molding and injection molding separately by proceeding compounding through the same compounding structure. Relative to the situation, the use of a set of extruders was reduced, lowering equipment costs and ensuring consistency of prescription. In addition, the pre-molding injection molding machine can be used in the demand to proceed with the production of injection molded products of a complicated structure type.

Example 6

The above-mentioned pre-mold injection molding machine is different from the present embodiment in that the divert valve 13 is a three-way valve, when the divert valve 13 is closed, the free mode gate valve 11 and the storage spray gate valve. All passages to (12) are closed. When the divert valve 13 is opened, all the passages flowing into the free mode gate valve 11 and the storage injection gate valve 12 are opened. Under normal circumstances, the divert valve 13 is in an open state. The free mode gate valve 11 and the storage injection gate valve 12 are locked to each other and the other is closed when one is opened. Therefore, the selection operation of the processing structure and the injection structure is realized by switching between the free mode gate valve 11 and the storage injection gate valve 12.

Example 7

The difference between the pre-molded injection molding machine and the present embodiment in Example 5 is that the pretreatment structure is transferred to other equipment without transferring into the injection molding machine clamping device 5 through the transfer mechanism after the pretreatment for the injection molded product. Proceed with subsequent processing.

Example 8

The difference between the premold injection molding machine and the present embodiment in Example 5 is that the pre-treatment structure does not need to be pretreated for the injection molded product when the premolded injection molding machine is processed on the injection molded product according to the demand of the structural type. The primary molding is performed through the injection molding machine clamping device (5).

Example 9

The difference between the pre-molded injection molding machine and the present embodiment is as shown in FIG. 2.

The premolded injection molding machine has a structure of a twin extruder type mixing structure, that is, the first motor 29 drives the first extruder 24 to operate, and the first extruder 24 has a first entrance port ( 26) is installed and the first entrance 26 is used for raw material input; The second motor 28 drives the lower second extruder 25, and the second extruder 25 is provided with a second entrance port 27 for inputting a fiber material, and the second extruder 25 is provided with the second extruder 25. Downstream of the first extruder 24 and the first extruder 24 is only used for raw material melting, and after the raw material is melted, flows into the second extruder 25 through the first extruder 24. do. The second extruder 25 is used to cut and melt the fiber material. The screw length of the second extruder 25 is shorter than the first extruder 24 and the heating temperature of the second extruder 25 is not higher than the first extruder 24. The second extruder 25 and the first extruder 24 take different drive mechanisms and operate them to realize different rotational speeds. The drive mechanism includes a fluid power motor, a motor, a gas power motor. Since the rotational speed of the second extruder 25 is lower than the rotational speed of the first extruder 24, the cutting order of the fiber material is reduced, so that the length of the fiber material held by the molded product is longer.

A raw material groove is installed on the second extruder, a conduit is installed on the first extruder, and the raw material after cutting and melting of the raw material groove and the conduit position correspond to each other flows into the second extruder through the first extruder. Be sure to In addition, the second extruder and the first extruder may be connected in the form of connecting a conductive passage.

In particular, when processing carbon fiber material, the strength of the carbon fiber material itself is easily damaged under high temperature, and the length of the carbon fiber and the degree of intrication in the finished product may affect the strength of the finished product. To solve this problem, it reduces the time that carbon fiber material is damaged at high temperature during the compounding process, decreases the temperature that carbon fiber material takes during the compounding process, reduces the cutting time of the carbon fiber material during the compounding process, and It is very important that the carbon fiber increases the length in the finished product by taking the form and increasing the cutting form during the blending process. In the present embodiment, one extruder is designed for the fiber material separately, and the processing is performed, and the fiber material and the raw material are processed through different extruders to secure the maximum length and the minimum high temperature damage after cutting the fiber material. The use of a twin-extruded compounding structure allows the processing range of the product to be adjusted to a greater extent, thereby realizing different rotational speeds to satisfy the melting of the raw materials and the mixing of the fiber materials and the molten raw materials.

Example 10

The premolded injection molding machine described above is different from the present embodiment in that the premolded injection molding machine takes a structure of a compound structure in which several extruders cooperate with each other, and the plurality of extruder cooperative types may be a multilevel progressive cooperative method. In other words, by installing a corresponding mouth on each level extruder, different raw materials are injected according to demand, and the rotation speed, length, and heating temperature of the extruder are different, and the injection molding melt of each level is directly introduced into the next level extruder.

The plurality of extruder cooperative types may be designed to design two or more extruders in the first level, the rotational speed, length, heating temperature of each extruder of the level is different, injection molding processed by the first level extruder The melt is introduced into the next level of extruder.

The plurality of extruder cooperative forms may be to design one extruder at the first level, the injection molding melt processed by each extruder of the level is introduced into a plurality of extruders of each next level. The rotation speed, length and heating temperature of each extruder of the next level extruder are all different.

Combinations of the various types of extruders can be used to meet rational batches of different raw materials and different processing demands.

Example 11

3, the premolded injection molding machine includes a pretreatment structure according to Example 5 and the twin-extruder blending structure according to Example 6 as shown in FIG. do.

The twin extruded compounding structure adopts a specific screw type to increase the cutting type of the fiber material in the compounding process, thereby increasing the length of the fiber in the finished product, thereby reducing the time for the fiber material to be damaged at high temperature during the compounding process and It lowers the temperature tolerated during the compounding process and shortens the cutting time of the fiber material during the compounding process. Separately designing an extruder for the fiber material to proceed with the processing and processing through a different extruder for the fiber material and raw material to ensure the maximum length after cutting the fiber material and to ensure the minimum degree of high temperature damage. By adopting a twin-extruded compounding structure, it is possible to widen the adjustment range of the product processing example to realize different rotational speeds to satisfy the melting of the raw materials and the mixing of the fiber materials and the molten raw materials.

By installing the pretreatment structure, it is possible to realize the integrated processing molding of the injection molded product of a complicated structure type, and solve the trouble that the injection molded product of the complicated structure type should be processed and transported in different equipment by dividing the order under a general situation. In addition, the processing efficiency of injection molded products of complex structure type has been greatly improved by avoiding poor after-sales, which are inconsistent product strength due to different prescription ratios. Under the premise that the injection process does not affect the flow demand of the injection molding melt, the pretreatment structure unit is introduced and the normal injection procedure is carried out while the pretreatment for the injection molded product is carried out simultaneously. In order to improve the utilization rate of equipment over time, solve the problem of low utilization rate of equipment, which must be mixed through different compounding structure in production of general equipment, and then press compression and injection molding respectively. By proceeding through the formulation, the use of a set of extruders was reduced to reduce equipment costs and ensure consistency of prescription. Pre-molded injection molding machines can also be used to meet the demand for production of complex molded injection molded products.

Example 12

The above-mentioned pre-molded injection molding machine is different from the present embodiment in that the pressure sensor 21 is installed at the outlet end of the extruder 1, and the pressure sensor 21 has a pressure value of the injection molding melt flowing out of the extruder. It is used to reduce the pressure value is converted into an electrical signal and transmitted to the control module 22. When the pressure exceeds the set value against the pressure signal and one preset value, the control module 22 stops the operation of the motor 23 to cause the extruder 1 to stop running, thereby causing the injection molding melt to flow out continuously. It serves as a safety protection to avoid excessive pressure.

The raw material may be polyamide, polyolefin, thermoplastic polyester, polycarbonate, high performance process plastic or other general purpose resin, polyester fiber, polyphenylene sulfide, modified polyphenylene oxide or polyetherimide, polyvinyl chloride, acrylonitrile Butadiene-styrene community, polystyrene or impact resistant polystyrene.

Example 13

As shown in FIG. 4, the above-described pre-molding injection molding machine is different from the present embodiment, and the storage injection switching structure includes a buffer material storage cylinder 41, a storage injection hydraulic cylinder 42, and a storage injection gate valve 43. And a storage injection gate valve cylinder 44, a material introduction pipe 45, an injection gate valve 46, and an injection gate valve cylinder 47.

As shown in FIG. 5, the buffer material storage cylinder 41 includes a material storage cylinder body 411 and a material storage cylinder plunger 412. Inside the material storage cylinder body 411 is a concentric structure and the material storage cylinder plunger 412 is located inside the material storage cylinder body 411. The outer diameter of the material storage plunger 412 and the inner diameter of the material storage cylinder body 411 coincide with the gaps. As shown in FIG. 6, an annular ferrule groove 4111 is installed on an inner wall of the material storage cylinder body 411, and a fertilizer tube 4112 is installed outside the die groove 4111. The raw material groove 4111 is used to collect the injection-molded melt overflowing from the gap between the material storage plunger 412 and the inner wall of the material storage cylinder body 411 and is discharged through the raw material pipe 4112 to collect waste. It falls within and prevents the raw material from falling down and contaminating the equipment. A heating device is also provided outside the buffer material storage cylinder 41 to be used for continuous heating of the injection molding melt and to cause the injection molding melt to remain molten every moment.

As shown in FIG. 5, a hydraulic cylinder body 421, a storage piston rod 422, and a connecting plate 423 are provided on the storage spray hydraulic cylinder 42. The material storage cylinder plunger 412 is connected to the connecting plate 423 located above the storage injection hydraulic cylinder 42 and the connecting portion is located at the center of the connecting plate 423. The storage spray hydraulic cylinder 42 is provided with two hydraulic cylinder body 421 symmetrically on both sides of the buffer material storage cylinder 41, the storage piston rod 422 is installed in each of the two hydraulic cylinder body It is. Two end portions of the storage piston rod 422 and the connecting plate 423 are fixedly connected to each other, and the connecting portions are formed on both sides symmetrical with the connection positions of the material storage cylinder plunger 412 and the connecting plate 423. . The twin hydraulic cylinder symmetrical installation reduces the height of the equipment, makes the structure tighter, and the force applied by the symmetrically installed storage piston rod is uniform so that the structure is more stable. The service life is extended by reducing breakage caused by not receiving uniformly.

Here, a positioning device is installed in one hydraulic cylinder body 421 and used to indicate the push height of the material storage cylinder plunger 412. The position sensing device may further connect a detector to remotely monitor the push height of the material storage cylinder plunger 412 in real time. A remote position sensing device may be further connected to the storage spray hydraulic cylinder, which is used to remotely monitor the material storage amount of the buffer material storage cylinder.

As shown in FIG. 6, the storage injection gate valve 43 includes a storage injection gate valve seat 431 and a storage injection gate valve spool 432. The storage spray gate valve seat 431 is provided with a first passage 4311 and a second passage 4312. Upper portions of the first passage 4311 and the second passage 4312 are both connected to the inner space of the material storage cylinder body 411. A two-way through hole 4321 and a three-way through hole 4322 are provided on the storage injection gate valve spool 432. As shown in FIGS. 7 and 8, the two-way through hole 4321 can switch the conduction state and the non-conduction state with the movement of the storage injection gate valve spool 432. In the conduction state, the two-way through hole 4321 is used to introduce the injection molding melt into the material discharge pipe 45. The three-way through hole 4322 can realize a three-way through state and a two-way through state as the storage injection gate valve spool 432 moves. In the two-way through state, the three-way through hole 4322 may realize conduction between the storage injection gate valve spool 432 and the storage injection gate valve seat 431. The upper portion of the three-way through hole 4322 is connected to the second passage 4312 provided on the storage injection gate valve seat 431, and the lower portion is connected to the material discharge pipe 45. Entry of injection molding melt can be additionally received. One end of the three-way through hole 4322 is connected to the operation valve 35 port of the compound structure, and an upper portion thereof is connected to the first passage 4311 installed on the storage spray gate valve seat 431. The lower part is electrically connected to the material extraction pipe 45. When the storage injection gate valve of the type is taken, the buffer material storage cylinder 41 and the material discharge pipe 45 can be electrically connected at any time. Since the injection molding melt has a constant viscosity, it takes two passages and connects the buffer material storage cylinder 41 to divide the buffer material storage cylinder 41 in an intangible into two parts. Inflow from the first passage (4311), a number of new material is located above the first passage (4311). In the non-storage state, the injection-molded melt flows out of the second passage, where a large number of the old material flows out of the second passage 4312 to reduce the accumulation of the old material in the buffer material storage cylinder.

As shown in FIG. 6, the storage injection gate valve cylinder 44 includes a storage injection gate valve, a cylinder body 441, and a storage injection gate valve cylinder pusher 422. The storage injection gate valve cylinder pusher 442 and the storage injection gate valve spool 432 are connected to each other to lead the storage injection gate valve spool 432 to move and to switch the conduction state.

The injection gate valve 46 includes an injection gate valve seat 461 and an injection gate valve spool 462. When the injection gate valve spool 462 is in the position shown in the figure, the injection gate valve 46 is closed and the passage connected thereto is not conductive. When the injection gate valve spool 462 is in the position shown in Fig. 9, the injection gate valve 46 is opened, the upper part is in communication with the material outlet pipe 45 and the lower part is in contact with the injection structure.

The injection gate valve cylinder 47 includes an injection gate valve cylinder body 471 and an injection gate valve cylinder pusher 472. The injection gate valve cylinder pusher 472 and the injection gate valve spool 462 are connected to each other to lead and move the injection gate valve stopper 462 to realize the opening and closing of the injection gate valve 46.

At least one heating device is installed in the storage injection gate valve 43, the material discharge pipe 45, and the injection gate valve 46, respectively, and is used for continuous heating of the injection molding melt and the injection molding melt. Always keep the molten state.

Each of the storage injection gate valve 43 and the injection gate valve 46 is further provided with a temperature sensor element, which is used to monitor the temperature in the conduit in real time.

Cooling water conduits are installed in the storage injection gate valve cylinder body 441 and the injection gate valve cylinder body 471, respectively. Used to avoid injured situations.

In addition to the storage spray switching structure, a protective cover is also provided, which is used to prevent a worker from being injured unexpectedly.

Since the compounding structure is a continuous material supply state during the operation, the injection molding melt is continuously extruded continuously. Since the injection structure is a hepatic working state, the mold has a compression holding time for a long time after injection. One temporary storage space must be installed for the molding melt. The injection gate valve 46 is closed under operation of the injection valve cylinder 47 when the injection structure has completed the material supply when the injection molding melt flows into the storage spray conversion structure. At the same time, the storage injection gate valve 43 moves to the position indicated in FIG. 8 under the operation of the storage injection gate valve cylinder 44. The injection molding melt flows into the buffer material storage cylinder 41 through the first passage 4311 when the material discharge pipe 45 is full, and performs temporary material storage. When the injection structure has finished injection molding and maintaining pressure, the injection gate valve 46 is opened under the operation of the injection gate valve cylinder 47 while the storage injection gate valve 43 is opened at the storage injection gate valve cylinder 44. Under operation, it moves to the position indicated in FIG. The injection molding melt conveyed by the compounding structure flows into the material extraction pipe 45 through the two-way through hole 4321. At the same time, the injection molded melt stored in the buffer material storage cylinder 41 is discharged through the second passage 4312 and the three-way through hole 4322 under the pressurization action of the storage injection hydraulic cylinder 42. 45). One of the buffer material storage is completed during the actual production process, and the injection molded melt flows out of the buffer material storage cylinder 41. However, since the viscosity of the injection molded melt is relatively large, some of the injection molded melt is a buffer material storage cylinder ( 41) remaining inside When the new injection molding melt flows into the buffer material storage cylinder 41 through the first passage 4311, a portion of the injection molding melt remaining is pushed over the second passage 4312 to complete the buffer material storing. Part of the remaining injection molding melt is discharged through the second passage (4312). This circulation replaces the old injection molding melt with a new injection molding melt to allow the injection molding melt to exchange through two passages, reducing the time that the old material remains in the storage spray conversion structure.

The storage spray conversion structure provides a temporary storage space for the injection molding melt continuously supplied by the compounding structure, which greatly increases the production efficiency during industrial production, and prevents damage to the equipment by repeatedly stopping the operation. Energy wasted due to repeated heating of the injection molded melt.

The foregoing descriptions are merely exemplary embodiments of the present invention, are merely illustrative of the present invention, and are not intended to be limiting. It will be understood by those skilled in the art that many changes, modifications, and even substitutions may be made to the invention within the spirit and scope defined by the protection scope of the invention, all of which fall within the protection scope of the invention.

1: extruder 2: injection barrel
3: material storage cylinder 4: compression molding machine
5: clamping device 6: conveyor belt
7: Fibrous material injection device 8: First entrance hole
9: cutting device 10: second entrance hole
11: gate valve 12: gate valve
13: directional valve 14: injection gate valve
15: molding before molding 17: blank
18: Die Head 19: Money Plate 1
20: Money Plate 2 21: Pressure Sensor
22: control module 23: motor
24: first extruder 25: second extruder

Claims (10)

As a pre-mold injection molding machine,
It is used in the processing of injection molded products, and the molding process for the processing atmospheric injection molded products having a complicated structural form, and includes an injection molding machine body for molding molding,
In the pre-molding injection molding machine, further comprising a pretreatment structure used to perform the first stage molding for the processing atmosphere injection molded product,
The pretreatment structure includes a die head for blank production; A pre-molded injection molding machine further comprising a pretreatment structure including a compression molding machine for the production of molding pre-molded products. The method of claim 1,
The pretreatment structure is connected to the injection molding machine body via a turnover valve, and by switching the turnover valve to change the direction of the flow of the injection molding melt, the injection molding melt is transferred between the pretreatment structure and the storage spray changeover structure. A pre-molding injection molding machine characterized by realizing the change of flow direction. The method according to claim 1 or 2,
The pretreatment structure further comprises a cutting device for cutting the continuous blank into independent blanks. The method according to claim 1 or 2,
And the pretreatment structure further comprises a transition mechanism for moving the blank and the molding preform to a subsequent structure. The method of claim 4, wherein
The transition mechanism type is a pre-molded injection molding machine comprising a conveyor belt, a money plate. The method of claim 4, wherein
The pre-treatment structure is a pre-molding injection molding machine characterized in that after the pre-treatment for the injection molded product, the transition mechanism is transferred into the injection molding machine clamping device installed in the pre-mold injection molding machine by the transition mechanism to perform molding molding. The method of claim 4, wherein
The pretreatment structure is a pre-molded injection molding machine characterized in that after the pre-treatment for the injection-molded product, the transfer mechanism is transferred to the other mechanism by the transfer mechanism and subsequent processing. The method of claim 4, wherein
When the premolded injection molding machine processes the injection molded product, the premolded injection molding process is performed by a direct injection molding machine clamping device without performing pretreatment on the injection molded product through the pretreatment structure. Molding machine. The method of claim 1,
The premold injection molding machine includes a first extruder having a first material inlet, the premold injection molding machine further includes a second extruder having a second material inlet, and the second extruder A premolded injection molding machine, characterized in that it is in a downstream position of the extruder. The method of claim 1,
The premolded injection molding machine further comprises a storage spray diverting structure, wherein the storage spray diverting structure includes a storage spray gate valve for changing a direction of flow of the injection molding melt; The storage spray gate valve is provided with a first passage and a second passage through which the injection molding melt flows, and the storage spray gate valve seat penetrates by the first passage; A storage injection gate valve spool positioned inside the storage injection gate valve seat and configured to change a distribution state of the injection molding melt; The storage injection gate valve spool includes a two-way through hole and a three-way through hole, and the two-way through hole realizes switching between a conduction state and a non-conduction state according to the movement of the storage injection gate valve spool. And the two-way through hole is used to draw and eject the injection molded melt into the storage injection gate valve in the conduction state, and the three-way through hole is divided into a three-way through state and two according to the movement of the storage injection gate valve spool. It is possible to realize the change of the room penetration state, wherein the three-way through hole realizes the conduction of the storage injection gate valve spool and the storage injection gate valve seat in the two-way penetration state, and the injection molding melt enters the three-way penetration state. Premolded injection molding machine, characterized in that additional reception.

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