KR101648462B1 - Injection cylinder unit of injection apparatus - Google Patents

Injection cylinder unit of injection apparatus Download PDF

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Publication number
KR101648462B1
KR101648462B1 KR1020150115226A KR20150115226A KR101648462B1 KR 101648462 B1 KR101648462 B1 KR 101648462B1 KR 1020150115226 A KR1020150115226 A KR 1020150115226A KR 20150115226 A KR20150115226 A KR 20150115226A KR 101648462 B1 KR101648462 B1 KR 101648462B1
Authority
KR
South Korea
Prior art keywords
housing
injection
piston
cylinder rod
space
Prior art date
Application number
KR1020150115226A
Other languages
Korean (ko)
Inventor
전윤선
하종기
김영신
모하비차 디트마르
소보다 조지
Original Assignee
주식회사 우진플라임
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 주식회사 우진플라임 filed Critical 주식회사 우진플라임
Priority to KR1020150115226A priority Critical patent/KR101648462B1/en
Application granted granted Critical
Priority to PCT/KR2016/009017 priority patent/WO2017030358A1/en
Publication of KR101648462B1 publication Critical patent/KR101648462B1/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17—Component parts, details or accessories; Auxiliary operations
    • B29C45/46—Means for plasticising or homogenising the moulding material or forcing it into the mould
    • B29C45/47—Means for plasticising or homogenising the moulding material or forcing it into the mould using screws
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17—Component parts, details or accessories; Auxiliary operations
    • B29C45/46—Means for plasticising or homogenising the moulding material or forcing it into the mould
    • B29C45/47—Means for plasticising or homogenising the moulding material or forcing it into the mould using screws
    • B29C45/50—Axially movable screw
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17—Component parts, details or accessories; Auxiliary operations
    • B29C45/46—Means for plasticising or homogenising the moulding material or forcing it into the mould
    • B29C45/47—Means for plasticising or homogenising the moulding material or forcing it into the mould using screws
    • B29C45/50—Axially movable screw
    • B29C45/5008—Drive means therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17—Component parts, details or accessories; Auxiliary operations
    • B29C45/46—Means for plasticising or homogenising the moulding material or forcing it into the mould
    • B29C45/47—Means for plasticising or homogenising the moulding material or forcing it into the mould using screws
    • B29C45/50—Axially movable screw
    • B29C45/5008—Drive means therefor
    • B29C2045/5028—Drive means therefor screws axially driven by the coaxial rotor of an electric motor

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)

Abstract

The present invention relates to an injection cylinder device for injection molders, which comprises: a housing in which an internal space and a through hole are formed; a piston dividing the internal space into a first sealed space and a second sealed space; a first cylinder rod fixed on one external side; a second cylinder rod of which a front end part is installed on the other side of the piston and a rear end part is extended toward a rear side of the housing; and an auxiliary housing having the smaller diameter than that of the housing. According to the present invention, it is possible to acquire energy saving effects due to reduced rotation number in an oil hydraulic pump involved in pumping fluid.

Description

[0001] The present invention relates to an injection cylinder unit for an injection molding machine,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an injection cylinder apparatus for an injection molding machine, and more particularly, to an injection cylinder apparatus for an injection molding machine, which is capable of reducing the supply amount of fluid supplied to the interior of a housing for retracting an injection screw, To an injection cylinder device of an injection molding machine capable of achieving an energy saving effect and reducing the cost by applying a small valve body.

Generally, an injection molding machine is a device for heating and melting a thermoplastic plastic molding material, and molding the molding material by injecting it from a nozzle into a cavity in an injection mold at a high pressure.

Such an injection molding machine is roughly divided into a mold-clamping apparatus section and an injection apparatus section. When the molding material is injected from the outside into the injection apparatus section, the injection apparatus section melts the injection molding section to generate injection resin, And then injected into a cavity to form a product. An example of such a conventional injection molding machine is shown in Fig.

FIG. 1 is a perspective view showing a conventional injection molding machine, and FIG. 2 is an enlarged sectional view of 'A' shown in FIG.

1, the conventional injection molding machine 100 includes a mold part 111 in which a cavity 111a corresponding to the shape of a product to be molded is formed, and a cavity 111a is formed at one side thereof with a cavity 111a, Injecting resin is injected into the cavity 111a when the leading end portion is inserted into the injection hole 110a, the injecting hole 110a being formed in the injection hole 110a, And an injection apparatus unit 120.

The injection apparatus unit 120 includes a barrel unit 121a and a barrel unit 121a which are installed in front of the mold unit 110 in the installation target area and inject injection resin into the cavity 111a through the injection hole 110a, An injection part 121 including an injection screw 121b rotatably mounted in the interior of the injection unit 121 and one end of the injection part 121 being connected to one side of the injection unit 121 and the injection screw 121b, And a pair of cylinder devices 122 for providing forward and backward power to the injection screw 121b.

In the conventional injection molding machine 100, when the molding material is supplied from the outside, the molding material is transferred in the tip direction of the barrel portion 121a while the injection screw 121b rotates, (Not shown) and the injection screw 121b provided in the cylinder 121a and is transferred to the tip end of the cylinder 121a while being advanced by the injection screw 121b by the cylinder device 122, Material, that is, injection resin is injected into the cavity 111a.

2, the conventional injection molding machine 100 includes a housing 122a having a space portion 122aa formed therein, a cylinder device 122 installed inside the housing 122a so as to be movable in forward and backward directions, A piston 122b for partitioning the inside of the housing 122a and defining a pair of space portions 122aa and 122ab and a cylinder rod 122b having a rear end coupled to the piston 122b and a front end connected to one side of the barrel 121a, The piston 122b and the cylinder rod 122c are moved in the forward and backward direction as the fluids are alternately supplied to both the space portions 122aa and 122ab of the partitioned housing 122a so that the injection screws 121b ). ≪ / RTI >

However, in the conventional injection molding machine 100, since the cylinder device 122 is also formed in a large size in the large injection device, the supply amount of the fluid flowing into the housing space portion 122aa for driving the cylinder device 122 is considerable The amount of fluid supplied per hour for retracting the injection screw 121b at a desired speed is larger than the allowable flow rate of the valve body provided on the fluid supply path, so that an expensive valve body having a high allowable flow rate is required, There was a rising problem.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a hydraulic pump capable of reducing the supply amount of fluid supplied to the interior of the housing to retract the injection screw, Which is capable of reducing the number of revolutions of the injection valve and achieving an energy saving effect as well as being able to apply a small valve body, thereby achieving cost reduction.

According to an aspect of the present invention, there is provided an injection cylinder device for an injection molding machine, which provides a forward and backward movement force to an injection screw for injecting injection resin into a cavity of an injection mold, A housing which is coupled to one side of the injection screw and is formed with an internal space therein and has a through hole formed on one side of the housing; A first cylinder rod having a rear end portion provided on one side of the piston and a front end portion exposed to the outside of the housing and fixed to an outer side of the piston; A second cylinder rod provided on the other side of the piston and having a rear end portion extending to the rear of the housing, An auxiliary housing formed outside the second cylinder rod at a rear end of the auxiliary cylinder and having a smaller diameter than the diameter of the housing and having a volume smaller than that of the first closed space, 1, when the piston is moved in the forward and backward direction, the air is drawn in and out of the second closed space through the through hole, An injection cylinder device of an injection molding machine is provided.

The auxiliary housing is preferably formed in a shape corresponding to the shape of the second cylinder rod.

The apparatus may further include a filter member installed at one side of the housing corresponding to the passage hole to filter foreign substances contained in the air flowing into the second closed space.

The auxiliary cylinder may further include an auxiliary piston coupled to a rear end of the second cylinder rod to partition the internal space of the auxiliary housing.

According to the present invention as described above, the fluid is supplied to the interior of the auxiliary housing surrounding the second cylinder rod to retract the injection screw, thereby reducing the supply amount of the fluid supplied to the interior of the housing in order to retract the injection screw, In addition, it is possible to reduce energy consumption by reducing the number of rotations of the hydraulic pump that pressurizes the fluid, and it is also possible to apply a small valve body, thereby achieving cost reduction.

1 is a perspective view showing a conventional injection molding machine,
FIG. 2 is an enlarged sectional view of 'A' shown in FIG. 1,
3 is a perspective view of an injection apparatus unit provided with an injection cylinder apparatus of an injection molding machine according to an embodiment of the present invention,
FIG. 4 is a plan sectional view of an injection apparatus unit provided with an injection cylinder apparatus of an injection molding machine according to an embodiment of the present invention,
5 is a view illustrating a state in which an injection screw is advanced according to an embodiment of the present invention;
6 is a view showing a state in which an injection screw is retracted according to an embodiment of the present invention;

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 3 is a perspective view of an injection apparatus unit provided with an injection cylinder apparatus of an injection molding machine according to an embodiment of the present invention, and FIG. 4 is a plan sectional view of an injection apparatus unit provided with an injection cylinder apparatus of an injection molding machine according to an embodiment of the present invention .

3 and 4, an injection cylinder device 1 of an injection molding machine according to an embodiment of the present invention includes a housing 10, a piston 20, a first cylinder rod 30, A cylinder rod 40 and an auxiliary housing 50.

The housing 10 includes an injection screw S1, a hydraulic motor S2 connected to one side of the injection screw S1 to provide a rotational force to the injection screw S1, an injection screw S1 and a hydraulic motor S2, And a pair of mutually opposed surfaces are provided on one side of the main body of the injection apparatus S provided with an injection ramshaft S3 for transferring the rotational force of the hydraulic motor S2 to the injection screw S1.

The housing 10 is formed in a substantially cylindrical shape and an inner space 11 is formed in the inner space 11. The inner space 11 is divided into a first closed space 11a and a second closed space 11a by a piston 20, The first closed space 11a serves to advance the injection screw S1 by causing the piston 20 to be described later to move to the rear side of the housing 10 when the fluid flows therein do.

The housing 10 is formed with a through hole 12 through which the air flows in and out at a position corresponding to the second enclosed space 11b and when the fluid flows in and out of the inner space 11 of the auxiliary housing 50 And provides a passage of air so that air can flow in and out of the second closed space 11b through the passage hole 12. [

When the filter member 13 is installed on one side of the housing 10 where the through hole 12 is formed and the air is introduced into the second closed space 11b through the through hole 12, It is preferable to prevent the inside of the housing 10 from being contaminated by foreign substances contained in the air flowing into the second closed space 11b by allowing the foreign substances contained in the air to be filtered.

The piston 20 is formed in a substantially circular plate shape corresponding to the inner shape of the housing 10 and is disposed inside the housing 10 to connect the inner space 11 of the housing 10 to the first sealing space 11a When the fluid flows into the first closed space 11a and the auxiliary housing 50, the fluid is moved in the front and rear direction inside the housing 10, Backward power to the first cylinder rod 30 and the second cylinder rod 40, respectively.

The first cylinder rod 30 is formed in a substantially rod shape and has a rear end portion fixedly coupled to the front center of the piston 20 and a barrel portion S4 having a front end exposed to the outside of the housing 10 and fixed to the outside And is fixedly coupled to one side.

When the fluid is supplied to the first closed space 11a, the first cylinder rod 30 pulls the housing 10 in the direction of the barrel S4 so that the injection screw S, (S1) advances forward within the barrel portion (S4) to inject the injection resin into the injection mold.

The second cylinder rod 40 is formed in a substantially rod shape like the first cylinder rod 30. The front end portion of the second cylinder rod 40 is fixedly coupled to the rear center of the piston 20 and the rear end thereof is exposed to the outside of the housing 10, When the second cylinder rod 40 is moved along the auxiliary housing 50 to guide the moving direction of the first cylinder rod 30 and fluid is supplied into the auxiliary housing 50 to be described later, The first cylinder rod 30 is moved forward.

The auxiliary piston 41 is coupled to the rear end of the second cylinder rod 40 and the auxiliary piston 41 defines the inner space 11 of the auxiliary housing 50 to be described later, It is preferable to prevent the fluid introduced into the space 11 from being introduced into the second closed space lib in advance.

The auxiliary housing 50 is formed at the rear end of the housing 10 on the outside of the second cylinder rod 40 and is formed with a diameter smaller than the diameter of the housing 10 and has a fluid inlet And the fluid inlet is connected to the hydraulic pump to supply the fluid from the outside to the inside.

The auxiliary housing 50 is provided with a separate fluid supply space for retracting the injection screw S1 in addition to the internal space 11 of the housing 10 and has a diameter smaller than the diameter of the housing 10, 11 are formed to have a smaller volume than the first closed space 11a.

That is, the auxiliary housing 50 supplies the fluid to the internal space 11 having a volume smaller than that of the first closed space 11a to allow the injection screw S1 to retreat, thereby greatly reducing the supply amount of the fluid The maintenance and repair cost can be greatly reduced, and the movement of the injection screw S1 can be easily controlled at a desired speed.

FIG. 5 is a view showing a state in which an injection screw according to an embodiment of the present invention is advanced, and FIG. 6 is a view illustrating a state in which an injection screw is retracted according to an embodiment of the present invention.

The operation of the injection cylinder device 1 of the injection molding machine having such a configuration according to the embodiment of the present invention will be described with reference to FIGS. 5 and 6. FIG.

First, fluid is supplied to the first closed space 11a to inject the injection resin into the cavity of the injection mold while the injection screw S1 rotates and the injection resin is fed to the tip of the barrel S4.

As the fluid is supplied to the first closed space 11a, the piston 20 is moved to the rear of the housing 10. As the tip of the first cylinder rod 30 is fixedly coupled to the barrel S4, 10 are slidingly moved forward of the housing 10 and the injection screw S1 coupled to the main body is advanced to inject the injection resin into the cavity of the injection mold.

When injection of the injection resin is completed, the supply of the fluid to the first closed space 11a is stopped, and the fluid is supplied to the interior of the auxiliary housing 50 to move the piston 20 forward of the housing 10, The front end portion of the first cylinder rod 30 is fixedly coupled to the barrel portion S4 so that the main body of the injection apparatus to which the housing 10 is coupled is slid rearward of the housing 10, The injection screw S1 is retracted.

On the other hand, when the housing 10 is moved back and forth as the main body of the injection apparatus is slid rearward of the housing 10, air is drawn in and out from the outside through the through holes 12 in the second closed space 11b , The air introduced into the second closed space 11b passes through the filter member 13 and foreign substances are filtered so that the second closed space 11b can be prevented from being contaminated by foreign substances contained in the air .

Although the present invention has been described in connection with the above-mentioned preferred embodiments, it is possible to make various modifications and variations without departing from the spirit and scope of the invention. Accordingly, the appended claims are intended to cover such modifications or changes as fall within the scope of the invention.

10: housing 11: inner space
11a: first closed space 11b: second closed space
12: through hole 13: filter member
20: piston 30: first cylinder rod
40: second cylinder rod 41: auxiliary piston
50: auxiliary housing

Claims (4)

An injection cylinder device of an injection molding machine for providing a forward and backward movement force to an injection screw for injecting injection resin into a cavity of an injection mold,
A housing coupled to one side of the injection screw movably in a forward and backward direction, the housing having an internal space formed therein and a through hole formed at one side thereof;
A piston movably installed in the inner space of the housing in the front and rear direction, the piston dividing the inner space into a first closed space and a second closed space communicating with the through hole;
A first cylinder rod having a rear end portion provided on one side of the piston and a tip end portion exposed to the outside of the housing and fixed to an outer side;
A second cylinder rod having a front end portion provided on the other side of the piston and a rear end portion extending toward the rear of the housing; And
And an auxiliary housing formed at a rear end of the housing on the outer side of the second cylinder rod and having a smaller diameter than the diameter of the housing and having a volume smaller than that of the first sealed space,
Wherein the piston is moved in the forward and backward directions while the fluid is alternately introduced into the interior of the auxiliary housing and the first closed space and the air is introduced into the second closed space through the passage hole And the injection cylinder unit is pulled out.
The method according to claim 1,
Wherein the auxiliary housing is formed in a shape corresponding to the shape of the second cylinder rod.
The method according to claim 1,
Further comprising: a filter member installed at one side of the housing corresponding to the passage hole to filter foreign substances contained in the air flowing into the second closed space.
The method according to claim 1,
Further comprising an auxiliary piston coupled to a rear end of the second cylinder rod to define an inner space of the auxiliary housing.
KR1020150115226A 2015-08-17 2015-08-17 Injection cylinder unit of injection apparatus KR101648462B1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
KR1020150115226A KR101648462B1 (en) 2015-08-17 2015-08-17 Injection cylinder unit of injection apparatus
PCT/KR2016/009017 WO2017030358A1 (en) 2015-08-17 2016-08-17 Injection cylinder device of injection molder

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020150115226A KR101648462B1 (en) 2015-08-17 2015-08-17 Injection cylinder unit of injection apparatus

Publications (1)

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KR101648462B1 true KR101648462B1 (en) 2016-08-17

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WO (1) WO2017030358A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113977887A (en) * 2021-09-28 2022-01-28 冯杰 Feeding device and feeding method based on liquid silica gel injection molding machine

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH1134132A (en) * 1997-07-23 1999-02-09 Mitsubishi Heavy Ind Ltd Cylinder apparatus
JPH11198205A (en) * 1998-01-12 1999-07-27 Nissei Plastics Ind Co Method and apparatus for preventing impact pressure of injection molding machine
KR20120080723A (en) * 2011-01-10 2012-07-18 삼성전자주식회사 Injection molding apparatus
KR20130082380A (en) * 2012-01-11 2013-07-19 주식회사동신유압 A injection molding machine

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101471360B1 (en) * 2014-05-20 2014-12-10 신덕수 Injection Apparatus In An Injection Molding Machine

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH1134132A (en) * 1997-07-23 1999-02-09 Mitsubishi Heavy Ind Ltd Cylinder apparatus
JPH11198205A (en) * 1998-01-12 1999-07-27 Nissei Plastics Ind Co Method and apparatus for preventing impact pressure of injection molding machine
KR20120080723A (en) * 2011-01-10 2012-07-18 삼성전자주식회사 Injection molding apparatus
KR20130082380A (en) * 2012-01-11 2013-07-19 주식회사동신유압 A injection molding machine

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113977887A (en) * 2021-09-28 2022-01-28 冯杰 Feeding device and feeding method based on liquid silica gel injection molding machine
CN113977887B (en) * 2021-09-28 2024-01-05 志源表面处理(惠州)有限公司 Feeding device and feeding method based on liquid silica gel injection molding machine

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