TWI735631B - Dual-clamp and dual-holding pressure device injection moulding machine to raise productivity - Google Patents

Abstract

This invention is about raising productivity using a dual-clamp and dual-holding pressure device injection moulding machine. The essence is left and right moveable platens, driven by their respective clamping cylinders, moving between a fixed platen and a tail platen. On the other side of the fixed platen is an injection unit with two nozzles for the two moulds the moveable halves of which are mounted on the two moveable platens. On the opposite side of the nozzles are their respective holding pressure devices. A 3-way channel connects the two nozzles. The 3-way channel is also connected to the barrel through an adaptor. Using a single screw and barrel, the melt is plasticized and injected through the 3-way channel to an open nozzle (the other being blocked by its holding pressure device). At the same time, the other (closed nozzle) is doing holding pressure and cooling on the other mould which is at the holding pressure and cooling stage. Accordingly, the dual-clamp and dual-holding pressure device are staggered in their injection moulding cycles on their respective moulds to achieve high productivity and low energy consumption.

Description

High-efficiency output double-locking, double-pressure-holding injection molding machine

The present invention relates to a double-clamping and double-pressure-holding injection molding machine with high-efficiency output, in particular to a dual-locking and double-pressure-holding injection molding machine to achieve continuous manufacturing, energy-saving, and cost-reducing efficiency. It is the inventor of the dual-locking and dual-pressure-holding injection molding machine that can produce.

Press, in the general injection molding machine used previously, the granular thermoplastic resin as a raw material is fed into the heating cylinder, and the resin is melted while the resin is melted while the resin is sent to the heating cylinder. On the nozzle side of the screw front end, the molten resin is injected into the cavity of the mold device from the nozzle installed at the front end of the screw. After the molten resin is cooled and solidified in the cavity, the mold device is opened, and the paste is applied by ejector pins, etc. The molded article attached to the mold moves out of the mold, thereby forming the molded article.

For the detailed operating principle of the above single-mode injection molding machine, please refer to the diagrams ninth to tenth. The clamping cylinder (91) is driven at the beginning of the machine (9), and the movable template (92) is pushed to allow the , The master mold is tightly closed, and the motor is driven to rotate the feeding screw (93) to transform the plastic from the heated material tube (94) into a flowing state, and the material liquid flowing in the direction of the material tube (94) is guided to flow When a reaction force is generated, the feeding screw (93) is moved back to the set storage position. After that, the feed screw (93) is pushed through the piston rod of the injection hydraulic cylinder (95), and the inside of the barrel (94) The stored flow-dynamic plastic is squeezed into the mold cavity through the material pipe head and the nozzle (941) filler. After the injection is completed, the pressure holding and cooling process is carried out, and then the clamping cylinder (91) is driven to reverse the movable template. , To form an open mold and eject the cured product in the mold.

However, during the injection process of the plastic injection molding machine, the granular plastic is pushed from the hopper through the feeding screw and is heated by the external electric heating plate of the material pipe (94) to transform into fluid dynamic plastic. The fluid dynamic plastic has thermal expansion phenomenon, so when When the flow dynamic plastic injection fills the mold cavity, the filling must be continued to prevent the collapsed and unsaturated shape of the finished product after cooling and shrinking. This filling action is the so-called "holding pressure".

From the above, it can be seen that the larger the wall thickness of the product produced by the single-mode injection molding machine of the prior art, the longer the holding and cooling time; relatively, the production speed of the product will be slower, the productivity will be reduced, and Increasing manufacturing costs is not in line with economic benefits and needs to be improved.

The reason is that the inventor upholds many years of rich experience in design, development and actual production in the related industry, and then researches and improves the existing structure to provide a high-efficiency output double-clamping, double-pressure-holding injection molding machine, in order to achieve better The purpose of practical value.

The main purpose of the present invention is to provide a dual-clamping and dual-pressure-holding injection molding machine with high-efficiency output, in particular to a dual-clamping mechanism and a dual-pressure holding device with the functions of holding pressure, blocking flow, and passing flow. The mutual exchange of the injection molding process achieves the purpose of a dual-locking and dual-pressure-holding injection molding machine that can be continuously manufactured and has energy saving and cost-reducing high-efficiency output.

The main purpose and effect of the double-locking and double-pressure-holding injection molding machine of the present invention are achieved by the following specific technical means: it is mainly provided with front and rear fixed templates on the machine table, and The first and second movable templates adjacent to the left and right are arranged between the rear fixed templates, and the first and second movable templates are respectively connected to form a first 1. The second clamping mechanism, and an injection mechanism is provided on the other side of the front fixed template on the machine table. The injection mechanism is provided with first and second injection nozzles corresponding to the first and second movable templates. , The first and second pressure holding devices are respectively provided in the rear section of the first and second injection nozzles, and a splitting material tube is arranged between the first and second injection nozzles, and the splitting material tube is connected The main material pipe head and the injection material pipe. A single injection tube is used to branch to one of its injection nozzles, and the material is stored and filled in the mold after a movable template is locked, and at the same time, the other injection nozzle and the mold locked on the other movable template are pressure-maintained. Cooling action; in this way, the cyclic principle of double-locking and double-holding pressure mutual exchange enables continuous manufacturing to achieve energy-saving and cost-reducing high-efficiency output effects.

The present invention is a preferred embodiment of the double-clamping and double-pressure-holding injection molding machine with high-efficiency output, wherein the first and second injection nozzles are provided with first and second discharge channels respectively, and the split flow A flow channel is arranged inside the material pipe, and two ends of the flow channel are respectively connected to the first and second discharge channels.

The present invention is a preferred embodiment of the high-efficiency double-clamping and double-pressure-holding injection molding machine, wherein the first and second pressure-holding devices include first and second pressure-holding cylinders, and first and second pressure-holding cylinders. Actuating ejector pins, the output shaft sections of the first and second pressure holding cylinders are correspondingly combined with the first and second actuating ejector pins, and the first and second actuating ejector pins are respectively embedded in the first and second actuating ejector pins. The second discharge channel can be driven by the first and second pressure-holding cylinders to move and move at the junction of the first and second discharge channels and the branch runner to form one end to stop the feeding and one end to be connected. Discharge.

The present invention is a preferred embodiment of the double-clamping and double-pressure-holding injection molding machine with high-efficiency output, wherein the output shaft sections of the first and second pressure-holding cylinders correspond to the first and second actuating ejector pins The way of joining can be buckle joining.

Based on the above, the composition of the structure of the present invention and the use and implementation description show that, compared with the existing structure, the present invention has the following advantages:

1. The high-efficiency double-locking and double-pressure-holding injection molding machine of the present invention uses pressure-holding and cooling time to continue the injection and filling process of another set of locking mechanisms to save time and improve production efficiency , Reduce the cost of production equipment and other effects.

2. The double-clamping and double-pressure-holding injection molding machine of the present invention can produce high-efficiency, so that the power required in the storage, injection and filling process is controlled by the main power source, and the pressure holding and cooling are slow and long for a long time. The process is controlled by a small power source, so that the load time of the main power source is reduced and a large amount of energy is saved.

this invention:

1: Machine

11: Front fixed template

111: Shot hole

12: Post fixed template

13: The first activity template

14: The second activity template

2: Injection mechanism

21: The first injection nozzle

211: First Outlet Channel

22: The second injection nozzle

221: Second Outlet Channel

23: Dividing material pipe

231: Shunt

24: Main feed pipe head

25: Injection tube

3: The first clamping mechanism

4: The second clamping mechanism

5: The first pressure holding device

51: First actuation ejector pin

52: The first pressure holding cylinder

6: The second pressure holding device

61: second actuation ejector pin

62: The second pressure holding cylinder

7: Buckle

existing:

9: Machine

91: Clamping cylinder

92: Event template

93: Material screw

94: Material pipe

941: Nozzle

95: Injection hydraulic cylinder

Figure 1: A schematic diagram of the overall appearance of the present invention.

Figure 2: A schematic side view of the present invention.

Figure 3: A schematic top view of the clamping mechanism of the present invention.

Figure 4: The three-dimensional exploded schematic view of the injection mechanism of the present invention.

Figure 5: A schematic diagram of the appearance of the injection mechanism assembly of the present invention.

Figure 6: The first schematic view of the action of the present invention.

Figure 7: The second schematic diagram of the action of the present invention.

Figure 8: Schematic diagram of the dual-mode injection cycle of the present invention.

Figure 9: A schematic diagram of the stereoscopic appearance of the prior art.

Figure 10: A schematic side view of the prior art.

In order to make the technical content, the purpose of the invention and the effects achieved by the present invention more complete and clear, the following detailed descriptions are given, and please refer to the disclosed drawings and figure numbers together: First of all, the actual application of the technology and methods of the present invention, please refer to the first to third figures, which are the overall appearance, side view and top view schematic diagrams of the double clamping and double pressure holding injection molding machine of the present invention for high-efficiency production. The machine table (1) of the molding machine is provided with front and rear fixed templates (11), (12), and an injection mechanism (2) is provided on the other side of the front fixed template (11), wherein: the front , The rear fixed templates (11), (12) are provided with first and second movable templates (13), (14) adjacent to each other and movable in parallel and movable relative to each other. The first and second movable templates ( 13) and (14) are respectively connected with the first and second clamping mechanisms (3), (4), the first and second clamping mechanisms (3), (4) drive the first , The second movable template (13), (14) is locked or opened relative to the front fixed template (11); and the injection mechanism (2) corresponds to the first and second movable templates (13), ( 14) The first and second injection nozzles (21), (22) are respectively arranged at the position, and a splitting material pipe (23) is arranged between the first and second injection nozzles (21) and (22). ), the shunt material pipe (23) is connected to a main material pipe head (24), and the main material pipe head (24) is connected to an injection material pipe (25) into which plastic is introduced; and the first and second The rear section of the injection nozzles (21) and (22) are respectively provided with first and second pressure holding devices (5), (6), and the first and second pressure holding devices (5) and (6) are respectively provided There are first and second actuating ejector pins (51), (61), the first and second actuating ejector pins (51), (61) are used to eject and close the shunt pipe (23) after injection Connecting the choke and pressure maintaining actors of the first and second injection nozzles (21) and (22).

Please refer to the first to seventh figures, the technical features of the double clamping, double holding pressure and double injection nozzle of the present invention are mainly applied to the injection molding machine, which can improve the production efficiency of the injection molding machine during production. The models of the injection molding machine include vertical injection molding machines or horizontal injection molding machines. When the vertical and horizontal models are used, the difference lies in the setting direction and the clamping direction of the mold end. One is a vertical mold. Set up, and move up and down the clamping and mold opening actions, while the other is horizontal mold setting, and the clamping and mold opening actions of front and back displacement; therefore, the technology of the present invention can be fully applied to vertical injection Molding machine and horizontal injection molding machine. However, the present invention uses a horizontal injection molding machine as an explanation in both the implementation description and the schematic representation, but it does not affect the application of its technical features to the vertical injection molding machine, which will be described in detail below.

The injection molding machine of the present invention can be a vertical machine or a horizontal machine. The machine (1) is mainly provided with front and rear fixed templates (11), (12), and then the front fixed template (11) ) Is provided with an injection mechanism (2) on the other side, and the characteristic technology of the present invention is that the first and second movable templates (13), (14), and the first and second movable templates (13), (14) are arranged adjacent to each other (as shown in the third figure), and the front fixed template (11) is connected to the first and second There are molds (including male and female molds) between the movable templates (13) and (14), so that the first and second movable templates (13) and (14) are respectively equipped with male molds, and the first 1. The first and second clamping mechanisms (3), (4) are respectively connected to the rear of the second movable template (13), (14), and the first and second clamping mechanisms (3), ( 4) It can drive the first and second movable templates (13), (14) to lock or open the mold relative to the front fixed template (11) respectively.

And the injection mechanism (2) at the other end of the front fixed template (11), the injection mechanism (2) has an injection tube (25), the injection tube (25) introduces the plastic through the inlet end and heats the guide And the front end of the injection material pipe (25) is provided with a main material pipe head (24), and the main material pipe head (24) is connected with a branch material pipe (23), and the branch material pipe (23) There is a branching channel (231) inside, and the first and second injection nozzles (21), (22) are separately arranged on both sides, and the first and second injection nozzles (21), (22) ) Are respectively provided with first and second discharge channels (211), (221) inside, and the two ends of the branch channel (231) are correspondingly connected with the first and second discharge channels (211), (221) The second discharge channels (211), (221); and the first and second injection nozzles (21), (22) correspond to the injection holes (111) of the front fixed template (11), respectively, So that the first and second injection nozzles (21), (22) correspond to the first and second movable templates (13), (14), respectively, so that plastic can be injected into the first and second A mold between the movable template (13), (14) and the front fixed template (11). Continuing, the first and second pressure holding devices (5), (6) are respectively provided in the rear section of the first and second injection nozzles (21), (22), and the first and second pressure holding devices (5) and (6) include first and second pressure holding cylinders (52), (62) and first and second actuating ejector pins (51), (61). The first and second pressure holding cylinders The output shaft sections of the cylinders (52) and (62) are correspondingly combined with the first and second actuating pins (51) and (61) [the combination method can be further combined with a buckle (7)], the first , The second actuating ejector pins (51), (61) are respectively embedded in the first and second discharge channels (211), (221), and can pass through the first and second pressure holding cylinders (52), (62) Drive and move to move at the junction of the first and second discharging channels (211), (221) and the branch runner (231) to form one end to stop the input and one end to conduct the discharge; therefore It can be seen that the first and second actuating ejector pins (51), (61) are used for ejecting and closing the splitting material pipe (23) after injection to communicate with the first and second injection nozzles (21), (22) The effect of choking, holding pressure, or shrinking and guiding plastic.

Please refer to Figures 6 to 7 together. In actual operation, first, the injection mechanism (2) is driven by power to make the first and second injection nozzles (21), (22) correspond to Embedded in the injection hole (111) of the front fixed template (11); and then the first movable template (13) is driven by the first clamping mechanism (3) to correspond to the front fixed template (11) The mold is locked, and at this time, the first actuating pin (51) of the first pressure holding device (5) is retracted so that the branch runner (231) and the first injection nozzle (21) The first spout (211) keeps flowing State, and the second discharge channel (221) of the second injection nozzle (22) on the other side is plugged by the second actuating pin (61) that is pushed out, and it is closed with the runner (231) state.

Next, let the injection material pipe (25) be stored and heated to inject the plastic into the shunt material pipe (23) through the main material pipe head (24), so as to guide the flow through the shunt channel (231) to the second A discharge channel (211) to inject the mold between the front fixed template (11) and the first movable template (13); after the injection is completed, the first actuating top of the first pressure holding device (5) At this time, the pin (51) is ejected out of the closed branch channel (231) and the first discharge channel (211). On the one hand, it blocks the flow and on the other hand performs pressure-keeping action; while the first group of injections is pressure-maintained During the process, the second clamping mechanism (4) is activated at the same time to drive the second movable template (14) to lock the mold corresponding to the front fixed template (11), and the second actuation pin (6) of the second pressure holding device (6) 61) Retracted to keep the flow-through state of the branching channel (231) and the second discharge channel (221) of the second injection nozzle (22), while also allowing the injection tube ( 25) Storage and heating of plastics. When the first group of injections are kept under pressure and cooled, the injection tube (25) is made to inject the plastic into the splitting tube (23) through the main tube head (24) to pass through the splitting channel (231) The flow is guided to the second discharge channel (221) to inject into the mold between the front fixed template (11) and the second movable template (14).

Following the above, after the injection is completed, the second actuating ejector pin (61) of the second pressure holding device (6) is ejected out of the closed branch channel (231) and the second discharge channel (221) at this time. On the one hand, the flow is blocked, and on the other hand, the pressure is maintained; when the second group of injections are in the process of pressure retention and cooling, the injection tube (25) continues to store and plasticize, while the first group of injections perform Cooling, mold opening and mold clamping. In this way, according to the above-mentioned process, the continuous exchange cycle is produced, so that the double movable template, double clamping mechanism, double injection nozzle and double pressure holding device continuously exchange the injection process in turn to achieve energy saving and reduction The efficiency of cost and efficiency.

It can be seen from the above that when the pressure holding time is long, the double movable template (mold), double clamping mechanism, double injection nozzle and double pressure holding device are used to make the double movable template (mold) stagger the holding time of the cycle. Overlap, the following is a list of actual operation periodic table, as shown in Figure 8, where: A represents the first group of injections; B represents the second group of injections; injection represents injection of plastic; motorized represents mold opening, ejection, ejection The mechanical action of retreating and closing the mold; plasticizing means the storage and heating time; holding pressure means the holding time after injection; cooling means the cooling time after injection; pump means the power source.

From the eighth figure, it can be seen that there is an overlap between holding pressure A and holding pressure B, so two pressure holding devices can shorten the process time; and the condition that two sets of pressure holding devices are required is: holding pressure A>max (plasticized B, Motor B) + Injection B; and the conditions for double productivity: Holding pressure A + Cooling A + Motor A>max (plasticizing B, motor B) + injection B + plasticizing A; from the eighth figure, it can be seen that at double productivity Add △ to the right to change the inequality into an equation. When pump 2 is driven by a servo motor, it can slow down the time of plasticizing A and plasticizing B, which does not affect the cycle, but achieves the effect of energy saving.

However, the foregoing embodiments or drawings do not limit the product structure or usage of the present invention, and any appropriate changes or modifications by those with ordinary knowledge in the technical field should be regarded as not departing from the patent scope of the present invention.

Based on the above, the composition of the structure of the present invention and the use and implementation description show that, compared with the existing structure, the present invention has the following advantages:

1. The high-efficiency double-locking and double-pressure-holding injection molding machine of the present invention uses pressure-holding and cooling time to continue the injection and filling process of another set of locking mechanisms to save time and improve production efficiency , Reduce the cost of production equipment and other effects.

2. The double-clamping and double-pressure-holding injection molding machine of the present invention can produce high-efficiency, so that the power required in the storage, injection and filling process is controlled by the main power source, and the pressure holding and cooling are slow and long for a long time. The process is controlled by a small power source, so that the load time of the main power source is reduced and a large amount of energy is saved.

In summary, the embodiments of the present invention can indeed achieve the expected use effect, and the specific structure disclosed by it has not been seen in similar products, nor has it been disclosed before the application, since it has fully complied with the provisions of the patent law. In accordance with the requirements, Yan filed an application for a patent for invention in accordance with the law, and asked for favors for examination and granted a patent.

1: Machine

11: Front fixed template

111: Shot hole

12: Post fixed template

13: The first activity template

14: The second activity template

2: Injection mechanism

21: The first injection nozzle

22: The second injection nozzle

23: Dividing material pipe

25: Injection tube

3: The first clamping mechanism

4: The second clamping mechanism

5: The first pressure holding device

6: The second pressure holding device

Claims (7)

A high-efficiency output double-clamping, double-pressure-holding injection molding machine. The injection molding machine is mainly equipped with front and rear fixed templates on the machine table, and an injection mechanism is provided on the other side of the front fixed template. : Between the front and rear fixed templates, there are adjacently arranged first and second movable templates that can move in parallel relative to each other, and the first and second movable templates are connected in groups with first and second locks respectively. The first and second clamping mechanisms drive the first and second movable mold plates to lock or open the mold relative to the front fixed mold plate; and the injection mechanism corresponds to the first and second movable mold plates. The first and second injection nozzles are respectively arranged at the position of the template, and a splitting material tube is arranged between the first and second injection nozzles. The splitting material tube is connected to a main material pipe head. The pipe head is connected with a plastic injection pipe; and the rear section of the first and second injection nozzles are respectively provided with first and second pressure holding devices, and the first and second pressure holding devices are respectively provided with The first and second actuated ejector pins, the first and second actuated ejector pins are used to push out and close the shunt pipe after injection to connect the flow blocking and pressure maintaining actions of the first and second injection nozzles By. The high-efficiency output double-clamping and double-pressure-holding injection molding machine described in claim 1, wherein the first and second injection nozzles are provided with first and second discharge channels respectively, and the split flow A flow channel is arranged inside the material pipe, and two ends of the flow channel are respectively connected to the first and second discharge channels. The high-efficiency output double-clamping and double-pressure-holding injection molding machine as described in claim 2, wherein the first pressure-holding device includes a first pressure-holding cylinder and a first actuating ejector pin, and the first pressure-holding device The output shaft section of the pressure cylinder is correspondingly combined with the first actuating ejector pin, and the first actuating ejector pins are respectively embedded in the first discharge channel and can be driven by the first pressure holding cylinder to be driven by the first pressure holding cylinder. The joint of the discharging channel and the sub-runner is movable and displaced to form an action of conducting the injection material or stopping the material input and pressure maintaining. The high-efficiency output double-clamping and double-pressure-holding injection molding machine according to claim 2, wherein the second pressure-holding device includes a second pressure-holding cylinder and a second actuating ejector pin, and the second pressure-holding device The output shaft section of the pressure cylinder is correspondingly combined with the second actuating ejector pin, and the second actuating ejector pins are respectively embedded in the second discharge channel and can be driven by the second pressure holding cylinder to be driven by the second pressure holding cylinder. The joint of the discharging channel and the sub-runner is movable and displaced to form an action of conducting the injection material or stopping the material input and pressure maintaining. The high-efficiency output double-clamping and double-pressure-holding injection molding machine as described in claim 3, wherein the output shaft section of the first pressure-holding cylinder corresponds to the first actuating ejector pin in combination with a buckle环合。 Ring combination. The high-efficiency output double-clamping and double-pressure-holding injection molding machine described in claim 4, wherein the output shaft section of the second pressure-holding cylinder corresponds to the second actuating ejector pin in combination with a buckle环合。 Ring combination. The high-efficiency output double-clamping and double-pressure-holding injection molding machine described in claim 4, wherein the injection molding machine is a vertical injection molding machine or a horizontal injection molding machine.

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