TW201910097A - 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-performance output double-locking, double-pressure injection molding machine

The invention relates to a double-mode-locking and double-pressure injection molding machine capable of high-efficiency production, in particular to a double-mode-locking and double-pressure-preserving exchange operation to achieve continuous manufacture and energy saving and cost reduction. The double-mode-locking and double-pressure injection molding machine that can produce the inventor is the application.

According to the conventional injection molding machine used in the prior art, the granular thermoplastic resin as a raw material is fed into the heating cylinder, and the resin is melted while the resin is placed on the retractable screw provided in the heating cylinder. On the nozzle side of the screw front end, the molten resin is ejected from the nozzle provided on the tip end side of the screw into the cavity of the mold device, and the molten resin is cooled and solidified in the cavity, and then the mold device is opened, and the ejector pin or the like is attached. The molded article attached to the mold is moved outside the mold, thereby forming the formed body.

For the detailed operation principle of the above-mentioned single-mode injection molding machine, please refer to the ninth to tenth drawings, in order to drive the clamping cylinder (91) on the machine (9), push the movable template (92) to let the public The mother mold is tightly closed, and the motor-driven rotary feed screw (93) is used to convert the plastic from the heated material tube (94) into a flowing state, and the liquid flowing in the direction of the material tube (94) is guided to flow. The reaction force is generated to cause the feed auger (93) to retreat to the set storage position. Then, the feed screw (93) is pushed by the piston rod of the injection hydraulic cylinder (95), and the flow dynamic plastic material stored in the cylinder (94) is pushed into the cavity through the nozzle (941) packing. After the completion of the shot, after the pressure maintaining and cooling process, the mold clamping cylinder (91) is driven to reverse the movable template to form an open mold and eject the molded product in the mold.

However, in the injection molding process of the plastic injection molding machine, the granular plastic is pushed by the hopper through the feeding screw, and is heated by the external heating piece of the material pipe (94) to be converted into a flow dynamic plastic, and the flow dynamic plastic has thermal expansion phenomenon, so when When the flow dynamic plastic injection fills the cavity, the filling must be continued to prevent the shape of the collapse deformation from being unsaturated after the cooling and shrinking of the finished product, and the filling operation is the so-called "holding pressure".

According to the above, the larger the wall thickness of the product produced by the single-mode injection molding machine of the prior art, the longer the pressure holding and cooling time; in contrast, the slower the production speed of the product, the lower the productivity, and Increasing manufacturing costs, but not in line with economic benefits, needs to be improved.

The reason is that the inventor has been rich in design and development and practical production experience of the relevant industry for many years, and has researched and improved the existing structure to provide a double-mode-locking and double-pressure injection molding machine with high efficiency to achieve better. The purpose of practical value.

The main object of the present invention is to provide a double-mode-locking and double-pressure injection molding machine with high efficiency, especially a double-locking mechanism and a double pressure-preserving device with pressure maintaining, blocking and flow-passing functions. The exchange process of exchanging each other achieves the purpose of a double-locking and double-pressure injection molding machine capable of continuously manufacturing and energy-saving and cost-reducing high-efficiency output.

The main purpose and efficacy of the double-mode-locking and double-pressure injection molding machine with high efficiency of the invention are achieved by the following specific technical means:

The utility model is mainly provided with front and rear fixed templates on the machine platform, and first and second movable templates adjacent to each other are arranged between the front and rear fixed templates, and the first and second movable templates are respectively connected and assembled. The first and second clamping mechanisms are further provided with an injection mechanism on the other side of the front fixed template on the machine table, and the injection mechanism is provided with first and second shots corresponding to the first and second movable templates respectively. a first pressure holding device is disposed in the rear portion of the first and second injection nozzles, and a split material tube is disposed between the first and second injection nozzles, and the flow dividing tube is disposed Connect the main material tube head and the injection material tube. Using a single injection tube to be shunted to one of the injection nozzles, the material is filled in a mold after the movable template is clamped, and at the same time, the other injection nozzle is held in pressure with the mold of the other movable template lock. The cooling action; thereby, the cycle principle of double-mode-locking and double-pressure-retaining exchanges enables the continuous manufacture to achieve energy-saving and cost-effective high-efficiency output.

A preferred embodiment of the high-performance double-mode-locking and double-pressure injection molding machine of the present invention, wherein the first and second shot nozzles are respectively provided with first and second discharge channels, and the shunt A splitter is disposed inside the material pipe, and the two ends of the splitter channel respectively communicate with the first and second discharge channels.

A preferred embodiment of the high-performance double-locking and double-pressure injection molding machine of the present invention, wherein the first and second pressure holding devices comprise first and second pressure maintaining cylinders, and first and second Actuating the top pin, the output shaft segments of the first and second pressure maintaining cylinders are correspondingly coupled to the first and second actuating pin pins, and the first and second actuating pin pins are respectively embedded in the first The second discharge channel can be driven by the first and second pressure maintaining cylinders to be displaced at the junction between the first and second discharge channels and the branching passage to form one end stop feed and one end conductive Discharge.

A preferred embodiment of the high-performance double-locking and double-pressure injection molding machine of the present invention, wherein the output shaft segments of the first and second pressure holding cylinders correspond to the first and second actuating pins The way of bonding can be combined with a buckle.

From the above, the composition and use of the structure of the present invention show that the present invention has the following advantages as compared with the existing structure:

1. The high-performance double-locking and double-pressure injection molding machine of the invention can continue the injection molding process of another set of clamping mechanism by using the pressure keeping and cooling time, so as to save time and improve production efficiency. Reduce the cost of production equipment and other effects.

2. The high-performance double-locking and double-pressure injection molding machine of the invention can be used to control the power required in the storage and injection filling process by the main power source, while the pressure and cooling are slow and long-term. The process is controlled by a small power source, thus reducing the load time of the main power source and achieving a large amount of energy saving.

For a more complete and clear disclosure of the technical content, the purpose of the invention and the effects thereof achieved by the present invention, it is explained in detail below, and please refer to the drawings and drawings:

First, the practical application techniques and means of the present invention, as shown in the first to third figures, are the overall appearance, side view and top view of the double-mode-locking and double-pressure injection molding machine with high efficiency output of the present invention, mainly for shooting. The machine table (1) of the molding machine is provided with front and rear fixed templates (11), (12), and on the other side of the front fixed template (11), an injection mechanism (2) is provided, wherein:

Between the front and rear fixed templates (11), (12), first and second movable templates (13), (14) disposed adjacent to each other and capable of parallel relative movable displacement, the first and second The movable templates (13) and (14) are respectively connected to the first and second clamping mechanisms (3) and (4), and the first and second clamping mechanisms (3) and (4) are driving devices. The first and second activity templates (13), (14) are clamped or opened relative to the front fixed template (11); and the injection mechanism (2) corresponds to the first and second activity templates (13) And (14) are respectively provided with first and second shot nozzles (21) and (22), and a split material is arranged between the first and second shot nozzles (21) and (22). a pipe (23), the split pipe (23) is coupled to a main pipe head (24), and the main pipe head (24) is coupled to a plastic injection pipe (25); and the first The second shot nozzles (21) and (22) are respectively provided with the first stage, The second pressure holding devices (5), (6), the first and second pressure maintaining devices (5), (6) are respectively provided with first and second actuating pin pins (51), (61), respectively The first and second actuating pins (51) and (61) are configured to eject and close the diverting tube (23) to communicate with the first and second projecting nozzles (21) and (22). The flow of resistance, pressure to protect the author.

Referring to the first to seventh figures, the technical features of the double-lock, double-pressure and double-shot nozzles of the present invention are mainly applied to an injection molding machine, which can improve the production efficiency of the injection molding machine during production. The model of the injection molding machine includes a vertical injection molding machine or a horizontal injection molding machine. When the vertical type and the horizontal type are used, the difference is the setting direction of the mold end and the direction of the mold clamping, and the one is the vertical mold setting. And the above-mentioned and the lower movement of the clamping and opening operation, and the other is the horizontal and horizontal mold setting, and the clamping and opening operation of the front and rear displacement; therefore, the technology of the present invention can be fully applied to the vertical injection molding. Machine and horizontal injection molding machine. However, the present invention uses a horizontal injection molding machine as an explanation for both the embodiment and the drawings, but does not affect the technical features thereof for use in a vertical injection molding machine, which will be described in detail below.

The injection molding machine of the present invention can adopt a vertical machine or a horizontal machine, and is mainly provided with front and rear fixed templates (11) and (12) on the machine table (1), and then the front fixed template (11). The other side is provided with an injection mechanism (2), and the characteristic technology of the present invention is to provide a first and a second movable template (13) between the front fixed template (11) and the rear fixed template (12). (14), and the first and second activity templates (13), (14) are adjacently disposed [as shown in the third figure], and the front fixed template (11) is first and second A mold (including a male and female mold) is disposed between the movable templates (13) and (14), so that the first and second movable templates (13) and (14) are respectively provided with a male mold, and the first 1. The second movable template (13) and (14) are respectively connected to the first and second clamping mechanisms (3) and (4), and the first and second clamping mechanisms (3), 4) Mainly driving the first and second activity templates (13), (14, respectively) Relative to the front stationary template (11) or the mold clamping.

And an injection mechanism (2) located at the other end of the front fixed template (11), the injection mechanism (2) has an injection tube (25), the injection tube (25) is introduced into the plastic via the feeding end and heated to guide And a main material pipe head (24) is disposed at a front end of the injection pipe (25), and the main material pipe head (24) is coupled with a diverting pipe (23), and the diverting material pipe (23) A splitter passage (231) is disposed inside, and first and second shot nozzles (21) and (22) are disposed on both sides, and the first and second shot nozzles (21), (22) The first and second discharge channels (211) and (221) are respectively disposed inside, and the two ends of the distribution channel (231) are connected to the first and second discharge channels (211), (221). And the first and second shot nozzles (21), (22) respectively correspond to the shot holes (111) of the front fixed template (11) to allow the first and second shots Nozzles (21) and (22) respectively corresponding to the first Second movable template (13), (14), allowing the injected first plastic respectively, between the second movable mold template (13), (14) with said front fixed die plate (11). Subsequently, first and second pressure holding devices (5) and (6) are respectively disposed at the rear portions of the first and second shot nozzles (21) and (22), and the first and second pressure holding devices are respectively arranged. (5), (6) including first and second pressure maintaining cylinders (52), (62) and first and second actuating pin pins (51), (61), said first and second holding pressure The output shaft segments of the cylinders (52) and (62) are combined with the first and second actuating pin pins (51) and (61) [the combination manner thereof may further adopt a buckle (7) combination], the first The second actuating pin pins (51) and (61) are respectively embedded in the first and second discharge channels (211) and (221), and can pass through the first and second pressure maintaining cylinders (52). (62) driving and moving at the junction of the first and second discharge channels (211), (221) and the branching channel (231) to form a one-end stop feed and one end to discharge the feed; It can be seen that the first and second actuating pin pins (51) and (61) are used for shooting After closing the top of the shunt tube (23) communicating said first, second sprue nozzles (21), (22) of the baffle, the pressure keeping operation, or reduce the effectiveness of the plastic flow.

Referring to the sixth to seventh diagrams together, in actual operation, first, the injection mechanism (2) causes the first and second shot nozzles (21) and (22) to correspond to each other via power driving. Embedding into the injection hole (111) of the front fixed template (11); and then driving the first movable template (13) to be driven by the first clamping mechanism (3) corresponding to the front fixed template (11) Mode locking, and at this time, the first actuating pin (51) of the first pressure holding device (5) is retracted to make the branching channel (231) and the first projecting nozzle (21) The first discharge passage (211) maintains the through flow state, and the second discharge passage (221) of the second injection nozzle (22) on the other side is embedded by the second driven top pin (61). The plug and the shunt (231) are in a closed state.

Continuing, the injection pipe (25) is injected and heated to inject the plastic through the main pipe head (24) into the split pipe (23) to be diverted through the branch passage (231). a mold (211) for injecting a mold between the front fixed template (11) and the first movable template (13); after the shot is completed, the first operating top of the first pressure holding device (5) The pin (51) at this time ejects the closed split runner (231) and the first discharge passage (211), on the one hand, the flow blocking, on the other hand, the pressure holding action; and in the first group of the injection, the pressure is maintained. The process is to simultaneously activate the second clamping mechanism (4) to drive the second movable template (14) corresponding to the front fixed template (11) to mold clamping, and the second pressure holding device (6) to the second actuating pin ( 61) retracting to maintain the flow path of the splitter passage (231) and the second discharge passage (221) of the second shot nozzle (22) while also allowing the shot discharge pipe ( 25) Storage and heating of plastic. When the first group of shots is cooled and maintained, the shot tube (25) is caused to inject the plastic through the main tube head (24) into the split tube (23) to pass through the branch (231). The flow is directed to the second discharge channel (221) to inject into the mold between the front fixed template (11) and the second movable template (14).

After the completion of the shot, the second actuating pin (61) of the second pressure holding device (6) at this time ejects the closed shunt (231) and the second chute (221), one The aspect is a flow blocking, and on the other hand, a pressure maintaining action; when the second group of injections is subjected to a process of holding and cooling, the injection material tube (25) continues to store and plasticize, and the first group of injections is performed. Cooling, mold opening and clamping, so that according to the above-mentioned process, the continuous exchange cycle is made, so that the double movable template, the double clamping mechanism, the double injection nozzle and the double pressure maintaining device can continuously exchange the injection process, thereby achieving energy saving and lowering. The efficiency of cost-effective output.

It can be seen from the above that when the holding time is long, the double-action template [mold], double-locking mechanism, double-shot nozzle and double pressure-preserving device are used to make the double-action template [mold] staggered cycle holding time Overlap, the following lists an actual operation cycle table, as shown in the eighth figure, where:

A represents the first group of shots; B represents the second group of shots; injection means injection of plastic; maneuver means mechanical action of mold opening, ejection, retreat, mold closing; plasticization means storage, heating time; pressure holding Indicates the holding time after the shot; cooling indicates the cooling time after the shot; the pump indicates the power source.

It can be seen from the eighth figure that there is overlap between the pressure holding A and the holding pressure B. Therefore, two pressure maintaining devices are provided to shorten the processing time; and the conditions for the two types of pressure maintaining devices are as follows:

Packing pressure A > max (plasticizing B, maneuvering B) + injection B;

And the conditions that can double productivity:

Packing A + cooling A + maneuvering A > max (plasticizing B, maneuvering B) + injecting B + plasticizing A;

As can be seen from the eighth graph, by adding Δ to the right hand side of the double productivity, the inequality can be changed into an equation. When the pump 2 is driven by a servo motor, the time of plasticizing A and plasticizing B can be slowed down, and the cycle is not affected, but the energy saving effect is achieved.

However, the above-described embodiments or drawings are not intended to limit the structure or the use of the present invention, and any suitable variations or modifications of the invention will be apparent to those skilled in the art.

From the above, the composition and use of the structure of the present invention show that the present invention has the following advantages as compared with the existing structure:

1. The high-performance double-locking and double-pressure injection molding machine of the invention can continue the injection molding process of another set of clamping mechanism by using the pressure keeping and cooling time, so as to save time and improve production efficiency. Reduce the cost of production equipment and other effects.

2. The high-performance double-locking and double-pressure injection molding machine of the invention can be used to control the power required in the storage and injection filling process by the main power source, while the pressure and cooling are slow and long-term. The process is controlled by a small power source, thus reducing the load time of the main power source and achieving a large amount of energy saving.

In summary, the embodiments of the present invention can achieve the expected use efficiency, and the specific structure disclosed therein has not been seen in similar products, nor has it been disclosed before the application, and has completely complied with the provisions of the Patent Law. And the request, the application for the invention of a patent in accordance with the law, please forgive the review, and grant the patent, it is really sensible.

this invention:

(1)‧‧‧ Machines

(11) ‧ ‧ front fixed template

(111)‧‧‧ shot hole

(12) ‧ ‧ post fixed template

(13) ‧‧‧ first activity template

(14) ‧‧‧Second activity template

(2) ‧ ‧ injection institutions

(21)‧‧‧First shot nozzle

(211)‧‧‧First discharge channel

(22) ‧‧‧second shot nozzle

(221)‧‧‧Second discharge channel

(23) ‧ ‧ diverting tube

(231) ‧ ‧ tributary runner

(24) ‧‧‧Main tube head

(25)‧‧‧ shot tube

(3) ‧‧‧First clamping mechanism

(4) ‧‧‧Second clamping mechanism

(5) ‧‧‧First pressure holding device

(51) ‧‧‧First actuating

(52) ‧‧‧First holding cylinder

(6) ‧‧‧Second pressure maintaining device

(61) ‧‧‧Second action

(62) ‧‧‧Second holding cylinder

(7) ‧‧‧ buckle

existing:

(9)‧‧‧ Machines

(91)‧‧‧Locking cylinder

(92) ‧‧‧ activity template

(93)‧‧‧

(94) ‧‧‧ material management

(941)‧‧‧Nozzles

(95)‧‧‧Injection hydraulic cylinder

First Figure: Schematic diagram of the overall appearance of the present invention.

Second Figure: A side view of the invention.

Third figure: a schematic top view of the clamping mechanism of the present invention.

Fourth figure: a schematic exploded view of the injection mechanism of the present invention.

Fig. 5 is a schematic view showing the appearance of the injection mechanism of the present invention.

Figure 6 is a cross-sectional view showing the operation of the present invention.

Figure 7 is a cross-sectional view showing the second embodiment of the present invention.

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

Ninth view: Schematic diagram of the stereoscopic appearance of the prior art.

Figure 10: Schematic view of the prior art.

Claims (7)

A high-performance double-locking and double-pressure injection molding machine is mainly provided with a front and a rear fixed template on the machine of the injection molding machine, and an injection mechanism on the other side of the front fixed template, wherein The first and second movable templates are disposed adjacent to each other and can be parallel to the relative movable displacement, and the first and second movable templates are respectively connected to the first and second locks. a mold mechanism, the first and second clamping mechanisms are configured to drive the first and second movable templates to be mold-locked or opened relative to the front fixed template; and the injection mechanism corresponds to the first and second activities The first and second injection nozzles are respectively disposed at the template position, and a diverting tube is disposed between the first and second injection nozzles, and the diverting material tube is coupled to a main material tube head, the main material The first and second injection nozzles are respectively provided with first and second pressure holding devices, and the first and second pressure maintaining devices are respectively provided. First and second actuating pin pins, wherein the first and second actuating pin pins are used After the injection, the flow-blocking tube that closes the first and second injection nozzles is closed and sealed. The double-mode-locking and double-pressure injection molding machine of the high-performance output according to claim 1, wherein the first and second injection nozzles are respectively provided with first and second discharge channels. A splitter is disposed inside the splitter tube, and the two ends of the splitter channel respectively communicate with the first and second discharge channels. The double-mode-locking and double-pressure injection molding machine of the high-performance output according to claim 1 or 2, wherein the first pressure maintaining device comprises a first pressure maintaining cylinder and a first actuating pinning pin, The output shaft segment of the first pressure maintaining cylinder is coupled to the first actuating pin, and the first actuating pin is respectively embedded in the first discharge channel and can be driven by the first pressure maintaining cylinder. Actuating displacement at the junction of the first discharge channel and the runner, forming a conductive or stop feed and a pressure maintaining actor. The double-mode-locking and double-pressure injection molding machine of the high-performance output according to claim 1 or 2, wherein the second pressure holding device comprises a second pressure maintaining cylinder and a second driving top pin. The output shaft segment of the second pressure maintaining cylinder is correspondingly coupled to the second actuating pin, and the second actuating pin is respectively embedded in the second discharge channel and can be driven by the second pressure maintaining cylinder. Actuating displacement at the junction of the second discharge channel and the runner, forming a conductive or stop feed and a pressure maintaining actor. The double-mode-locking and double-pressure injection molding machine of the high-performance output according to claim 3, wherein the output shaft of the first pressure maintaining cylinder corresponds to the manner of combining the first actuating pin A buckle can be used in combination. The double-mode-locking and double-pressure injection molding machine of the high-performance output according to claim 4, wherein the output shaft segment of the second pressure maintaining cylinder corresponds to the manner of combining the second actuating pin A buckle can be used in combination. A high-performance double-locking, double-pressure injection molding machine as described in claim 4, wherein the injection molding machine is a vertical injection molding machine or a horizontal injection molding machine.