CN210100605U

CN210100605U - Built-in oil cylinder for injection molding machine

Info

Publication number: CN210100605U
Application number: CN201920905308.9U
Authority: CN
Inventors: 姜洪; 马海舟; 李鹏飞; 方思令; 陈城; 胡府泼
Original assignee: Zhejiang Shengbang Intelligent Equipment Co Ltd; Zhejiang Sunbun Technology Co Ltd; Sunbun Group Co Ltd
Current assignee: Zhejiang Shengbang Intelligent Equipment Co Ltd; Zhejiang Sunbun Technology Co Ltd; Sunbun Group Co Ltd
Priority date: 2019-06-17
Filing date: 2019-06-17
Publication date: 2020-02-21
Anticipated expiration: 2029-06-17

Abstract

A built-in oil cylinder for an injection molding machine. The problem of when the hydro-cylinder of current injection molding machine was installed, the volume was great and occupy the seat and advance the mounted position of hydro-cylinder for product installation, operation, maintenance are difficult is solved. The piston rod divides the space in the cylinder body into a first accommodating cavity and a second accommodating cavity, the cylinder body is provided with a first oil hole and a second oil hole, the second accommodating cavity is internally provided with an ejecting and retreating rod, the piston rod is provided with an air cavity, the ejecting and retreating rod penetrates through the piston to be inserted into the air cavity and enables the piston to form sliding fit with the ejecting and retreating rod, the ejecting and retreating rod is provided with a channel, the cylinder body is provided with a second channel communicated with the outside, and the air cavity is communicated with the second channel through the first channel. The utility model discloses simple structure still has, convenient assembling, and the action is reliable, and is small, advantages such as long service life.

Description

Built-in oil cylinder for injection molding machine

Technical Field

The utility model relates to an injection molding machine, concretely relates to built-in hydro-cylinder for injection molding machine.

Background

An injection molding machine is also known as an injection molding machine or an injection machine. It is a main forming equipment for making various shaped plastic products from thermoplastic plastics or thermosetting plastics by using plastic forming mould. The injection molding machine can heat plastic and apply high pressure to the molten plastic to inject the plastic to fill the mold cavity.

At present, an oil cylinder is needed to be used in the using process of an injection molding machine, the oil cylinder is arranged on a mounting seat and controls an injection screw to move relatively through the oil cylinder, the injection screw moves forwards relatively through ejection of the oil cylinder, and the injection screw moves backwards relatively through retraction of the oil cylinder. According to the conversion formula of the flow and the flow velocity, the area is inversely proportional to the flow velocity, and when a common oil cylinder is adopted, the oil discharge is not smooth when the oil cylinder moves forwards due to the large volume of the rodless cavity, namely the forward movement of the injection screw rod is relatively slow when the injection is performed. In order to solve the problem of slow action of the existing injection screw, the structure with an external oil cylinder front cavity commonly used by the existing injection molding machine is shown in figure 1, the piston of the structure is longer, and the piston rod extends out of the injection retreating cylinder cover, so that the whole appearance space structure is reduced.

SUMMERY OF THE UTILITY MODEL

The utility model provides a great and occupy the mounted position that seat advances the hydro-cylinder when solving the hydro-cylinder installation of current injection molding machine among the background art for the problem of product installation, operation, maintenance difficulty, the utility model provides a built-in hydro-cylinder for injection molding machine.

The technical scheme of the utility model is that: a built-in oil cylinder for an injection molding machine comprises a cylinder body, a piston rod and a piston, wherein the piston rod divides the space in the cylinder body into a first containing cavity and a second containing cavity, one end of the piston rod is inserted into the cylinder body and connected with the piston, the other end of the piston rod penetrates out of the cylinder body from the first cavity and is used for controlling the action of the injection molding machine, the cylinder body is provided with a first oil hole and a second oil hole, the first oil hole is communicated with the first cavity, the second oil hole is communicated with the second containing cavity, an injection rod and a retreat rod are arranged in the second containing cavity, an air cavity is arranged on the piston rod, the ejection rod penetrates through the piston and is inserted into the air cavity, so that the piston forms sliding fit with the ejection rod, the ejection rod is provided with a channel, the cylinder body is provided with a second channel communicated with the outside, and the air cavity is communicated with the second channel through the first channel.

As an improvement of the utility model, the cylinder body on be equipped with the third passageway, third passageway and first passageway be linked together, the exit of third passageway is linked together through stop valve and oilcan.

As a further improvement of the utility model, the stop valve and the oil can are communicated through a nylon pipe.

As a further improvement of the present invention, the outlet of the second channel is disposed upward, and the outlet of the third channel is disposed downward.

As a further improvement of the utility model, the cylinder body include injection cylinder cap, hydro-cylinder casing and penetrate and move back the cylinder cap, second passageway and third passageway all locate to penetrate and move back on the cylinder cap.

As a further improvement of the utility model, the hydro-cylinder shell locate the injection cylinder lid and penetrate and move back between the cylinder lid, the hydro-cylinder shell be equipped with the hydro-cylinder foundry goods outward.

As a further improvement, the rear of the ejection cylinder cover is provided with a seat-in oil cylinder.

As a further improvement of the utility model, the first oilhole locate to inject the cylinder cover on, the second oilhole locate to penetrate and move back the cylinder cover on, first oilhole and second oilhole all be linked together with the switching-over valve.

As a further improvement of the utility model, an air filter is arranged at the outlet of the second channel.

As a further improvement, the piston and the cylinder inner wall between be equipped with first sealing member, the piston inner wall with penetrate and retreat and be equipped with the second sealing member between the pole outer wall.

The beneficial effects of the utility model are that, set up a built-in hydro-cylinder and can guarantee the high-speed action of product, simultaneously again can the space in the rational utilization product, the installation and the maintenance of the product of being convenient for. The utility model discloses the whole space that does not account for of appearance, the installation of other parts of being convenient for because the second holds the built-in area that has installed the penetrating pole that moves back and has reduced the second and hold the chamber for injection speed improves, can realize high-speed injection. The utility model discloses simple structure still has, convenient assembling, and the action is reliable, and is small, advantages such as long service life.

Drawings

Fig. 1 is a schematic structural diagram of a conventional oil cylinder.

Fig. 2 is a schematic structural diagram of an embodiment of the present invention.

In the figure, 1, a cylinder body; 11. a first cavity; 12. a second cavity; 13. a first oil hole; 14. a second oil hole; 15. an injection cylinder cover; 16. a cylinder housing; 17. ejecting and retreating the cylinder cover; 18. an oil cylinder casting; 19. a seat-in oil cylinder; 2. a piston rod; 21. an air cavity; 3. a piston; 31. a first seal member; 32. a second seal member; 4. ejecting and retreating the rod; 41. a first channel; 51. a second channel; 52. a third channel; 6. a stop valve; 7. an oil can; 8. a nylon tube; 9. a diverter valve; 10. an air cleaner.

Detailed Description

The embodiments of the present invention will be further explained with reference to the accompanying drawings:

as shown in fig. 2, a built-in oil cylinder for an injection molding machine comprises a cylinder body 1, a piston rod 2 and a piston 3, wherein the piston rod 2 divides the space in the cylinder body 1 into a first containing cavity 11 and a second containing cavity 12, one end of the piston rod 2 is inserted into the cylinder body 1 and connected with the piston 3, the other end of the piston rod 2 penetrates out of the cylinder body 1 from the first containing cavity 11 to control the action of the injection molding machine, the cylinder body 1 is provided with a first oil hole 13 and a second oil hole 14, the first oil hole 13 is communicated with the first containing cavity 11, the second oil hole 14 is communicated with the second containing cavity 12, the second containing cavity 12 is internally provided with an injection rod 4, the piston rod 2 is provided with an air cavity 21, the injection rod 4 penetrates through the piston 3 and is inserted into the air cavity 21 to enable the piston 3 to form sliding fit with the injection rod 4, the injection rod 4 is provided with a first channel 41, the cylinder body 1 is provided with a second channel 51 communicated, the air chamber 21 communicates with the second passage 51 through the first passage 41. The utility model discloses set up a built-in hydro-cylinder and can guarantee the high-speed action of product, simultaneously again can the space in the rational utilization product, the installation and the maintenance of the product of being convenient for. The utility model discloses the whole space that does not account for of appearance, the installation of other parts of being convenient for because the second holds the built-in area that has installed the penetrating pole that moves back and has reduced the second and hold the chamber for injection speed improves, can realize high-speed injection. The utility model discloses simple structure still has, convenient assembling, and the action is reliable, and is small, advantages such as long service life. Specific theory adopts the utility model discloses back injection hydrovalve latus rectum can reduce, and the volume of oil circuit manifold block is whole to be dwindled, can realize high-speed injection. The utility model 1 has compact and simple appearance structure, and is convenient for mounting a base oil inlet cylinder at the position of the cylinder cover during injection and retreat; 2. high-speed high-pressure injection can be realized, and the efficiency is high; 3. the hydraulic system is simple and easy to process, and the cost is reduced; 4. the original installation size and appearance structure can not be changed, and the universal matching performance is good.

The cylinder body 1 is provided with a third channel 52, the third channel 52 is communicated with the first channel 41, and the outlet of the third channel 52 is communicated with the oil can 7 through a stop valve 6. Specifically, the stop valve 6 is communicated with the oil can 7 through a nylon pipe 8. Because the injection and retreat rod is hidden in the piston with the air cavity, the service life of the sealing element and the leakage of oil are considered in the long-time injection or injection and retreat process, an oil pot of an outward leakage oil cylinder is connected at the bottom of the injection and retreat cylinder cover, air generated in the moving process of the piston is discharged into the atmosphere from the second channel of the injection and retreat cylinder cover and then from an air filter at ordinary times, and more specifically, the air filter 10 is arranged at the outlet of the second channel 51. The structure enables the gas exhausted into the atmosphere to be cleaner and more environment-friendly, and particularly air pollution is not easy to cause in the working environment, so that the physical and mental health of operators is influenced.

The outlet of the second channel 51 is arranged upwards, and the outlet of the third channel 52 is arranged downwards. The outlet of the third channel faces downwards (bottom) so as to facilitate the collection of leakage oil, and the outlet of the second channel faces upwards so as to facilitate the discharge and flow of air and the replacement of an air filter.

The cylinder body 1 comprises an injection cylinder cover 15, an oil cylinder shell 16 and an injection and retreat cylinder cover 17, and the second channel 51 and the third channel 52 are arranged on the injection and retreat cylinder cover 17. Specifically, the oil cylinder shell 16 is arranged between the injection cylinder cover 15 and the injection and retraction cylinder cover 17, and an oil cylinder casting 18 is arranged outside the oil cylinder shell 16. The structure is convenient for disassembly and assembly maintenance, and particularly, when the sealing element leaks due to service life or damage, the sealing element can be quickly maintained and replaced.

And an oil inlet cylinder 19 is arranged behind the injection cylinder cover 17. The seating oil cylinder is arranged to play a role in fixing, so that a casting (mounting seat) for injection can be pulled to prevent the casting from retreating.

The first oil hole 13 is arranged on the injection cylinder cover 15, the second oil hole 14 is arranged on the injection cylinder cover 17, and the first oil hole 13 and the second oil hole 14 are communicated with the reversing valve 9. Specifically, the reversing valve is a three-position four-way electromagnetic reversing valve, and the structure can reliably feed and discharge oil and control the piston rod to rapidly move.

A first sealing element 31 is arranged between the piston 3 and the inner wall of the cylinder body 1, and a second sealing element 32 is arranged between the inner wall of the piston 3 and the outer wall of the ejection rod 4. The first sealing element and the second sealing element enable the product to have good sealing performance, and the piston rod can move reliably and continuously.

When the change valve D1 is electrified for injection, pressure oil P enters the first cavity from the first oil hole 13 through the change valve to push the piston to move, namely injection action, oil in the second cavity flows back to the oil tank T from the second oil hole 14 through the change valve, and meanwhile, the built-in injection and retraction rod and the injection and retraction cylinder cover are fixed into a whole because the built-in injection and retraction rod and the injection and retraction cylinder cover are fixed. The area of the air cavity in the piston rod is compressed, and the air in the air cavity is directly discharged to the atmosphere through the first channel, the second channel with the upward ejection cylinder cover and the air filter, so that the injection action is completed.

When the reversing valve D2 is electrified to perform ejection and retraction, pressure oil P enters the second cavity from the second oil hole through the reversing valve to push the piston to move, namely, the ejection and retraction action, oil in the first cavity flows back to the oil tank T from the first oil hole through the reversing valve, meanwhile, because the built-in ejection and retraction rod is fixed with the ejection and retraction cylinder cover, the area of an air cavity in the piston rod generates negative pressure, and outside air enters the air cavity through the air filter, the second channel of the ejection and retraction cylinder cover and the first channel of the built-in ejection and retraction rod to complete the ejection and retraction action.

When the machine runs for a long time, due to the reduction of the service life and the sealing effect of the second sealing element, a third channel is formed at the bottom of the injection cylinder cover to prevent oil liquid leaked from the second containing cavity from being discharged into air, the third channel is an oil drainage hole, a stop valve and a nylon pipe leading to an oil can are connected to the outside of the third channel, the stop valve is closed during the running of the machine, and the stop valve is opened to discharge waste oil during the maintenance of the machine.

In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art. In addition, in the description of the present invention, "a plurality" means two or more unless otherwise specified.

The skilled person should understand that: although the present invention has been described in accordance with the above embodiments, the inventive concept is not limited to this embodiment, and any modification of the inventive concept will be included in the scope of the patent claims.

Claims

1. A built-in oil cylinder for an injection molding machine comprises a cylinder body (1), a piston rod (2) and a piston (3), and is characterized in that the piston rod (2) divides the space in the cylinder body (1) into a first containing cavity (11) and a second containing cavity (12), one end of the piston rod (2) is inserted into the cylinder body (1) and connected with the piston (3), the other end of the piston rod penetrates out of the cylinder body (1) from the first containing cavity (11) and is used for controlling the action of the injection molding machine, the cylinder body (1) is provided with a first oil hole (13) and a second oil hole (14), the first oil hole (13) is communicated with the first containing cavity (11), the second oil hole (14) is communicated with the second containing cavity (12), an injection rod (4) is arranged in the second containing cavity (12), the piston rod (2) is provided with an air cavity (21), and the injection rod (4) penetrates through the piston (3) and is inserted into the air cavity (21) so that the piston (3) can inject and eject the rod (4 The injection and retraction rod (4) is provided with a first channel (41), the cylinder body (1) is provided with a second channel (51) communicated with the outside, and the air cavity (21) is communicated with the second channel (51) through the first channel (41).

2. The built-in oil cylinder for the injection molding machine according to claim 1, characterized in that the cylinder body (1) is provided with a third channel (52), the third channel (52) is communicated with the first channel (41), and the outlet of the third channel (52) is communicated with the oil pot (7) through a stop valve (6).

3. The built-in oil cylinder for the injection molding machine according to claim 2, characterized in that the stop valve (6) is communicated with the oil pot (7) through a nylon pipe (8).

4. The built-in oil cylinder for an injection molding machine according to claim 2, characterized in that the outlet of the second passage (51) is disposed upward and the outlet of the third passage (52) is disposed downward.

5. The built-in oil cylinder for the injection molding machine according to claim 2, characterized in that the cylinder body (1) comprises an injection cylinder cover (15), an oil cylinder shell (16) and an injection and retraction cylinder cover (17), and the second channel (51) and the third channel (52) are both arranged on the injection and retraction cylinder cover (17).

6. The built-in oil cylinder for the injection molding machine according to claim 5, characterized in that the oil cylinder housing (16) is arranged between the injection cylinder cover (15) and the injection and retraction cylinder cover (17), and the oil cylinder casting (18) is arranged outside the oil cylinder housing (16).

7. The built-in oil cylinder for the injection molding machine according to claim 5, characterized in that a seat-in oil cylinder (19) is arranged behind the ejection cylinder cover (17).

8. The built-in oil cylinder for the injection molding machine according to claim 5, characterized in that the first oil hole (13) is arranged on the injection cylinder cover (15), the second oil hole (14) is arranged on the injection cylinder cover (17), and the first oil hole (13) and the second oil hole (14) are both communicated with the reversing valve (9).

9. The built-in cylinder for an injection molding machine according to claim 8, characterized in that an air cleaner (10) is provided at an outlet of the second passage (51).

10. The built-in oil cylinder for the injection molding machine according to claim 1, characterized in that a first sealing member (31) is arranged between the piston (3) and the inner wall of the cylinder body (1), and a second sealing member (32) is arranged between the inner wall of the piston (3) and the outer wall of the ejection rod (4).