CN114919123B

CN114919123B - Injection molding device

Info

Publication number: CN114919123B
Application number: CN202210222733.4A
Authority: CN
Inventors: 王兴东
Original assignee: ACMEPLAS SYSTEM TECHNOLOGIES Ltd
Current assignee: ACMEPLAS SYSTEM TECHNOLOGIES Ltd
Priority date: 2022-03-09
Filing date: 2022-03-09
Publication date: 2023-11-03
Anticipated expiration: 2042-03-09
Also published as: CN114919123A

Abstract

The application discloses an injection molding device, which relates to the technical field of molding processing and comprises an injection device, a cylinder, a screw, a molding die, a demolding mechanism and a supporting guide seat, wherein a heating device is arranged outside the cylinder; a preheating pipe is wound in the supporting guide seat and is connected with a cooling system, the preheating pipe is communicated with a circulating pipe, and the circulating pipe is wound in the heating device; the screw is wound with a heat conducting wire, one end of the heat conducting wire is fixed, and the other end extends to the cylinder material port and the inner side wall of the injection device. The application utilizes one heat source to provide heat for each part through the pipeline circulation and the heat conducting wire, saves energy, prevents the blockage of a material opening through heat transfer, improves the stirring and mixing effects, avoids the condition of poor molding quality caused by suddenly cooling the molten material, and has the effects of improving the working efficiency and improving the quality of finished products.

Description

Injection molding device

Technical Field

The application relates to the technical field of molding processing, in particular to an injection molding device.

Background

Injection molding, also known as injection molding, is a method of injection and molding. The injection molding method has the advantages of high production speed, high efficiency, automation in operation, multiple patterns, various shapes, large size, accurate product size, easy updating of the product, and capability of forming parts with complex shapes, and is suitable for the field of mass production, products with complex shapes and other molding processing.

When the existing injection molding machine is used, as the quality of the finished product of injection molding is greatly influenced by temperature, the temperature is lower and can influence in each step of injection molding, therefore, in the injection molding process, the temperature in a cylinder is usually increased, the temperature in a well controlled mold is not too high or too low, the adopted means is to generally increase the temperature of a heater and control a water cooling system in the mold, but the defect that the control or change is difficult to realize at present still exists in the injection molding process: (1) In the injection molding process, the temperature of the injection nozzle is too low, so that the temperature of the mold is too low, and the finished product is incomplete; (2) The temperature of the material opening is too low, and the initial material is easy to block the material opening, so that normal feeding is affected, and the forming efficiency is low; (3) In order to ensure the quality of finished products, the temperature in the cylinder needs to be greatly increased, so that the injection molding machine wastes energy and has high production cost; (4) The raw and molten materials undergo a large change in temperature as they pass from one process to another, resulting in the quality of the materials being affected and thus the quality of the finished product.

Based on the above problems, the present application provides an injection molding device to solve the above problems.

Disclosure of Invention

The application aims to solve the defects in the prior art and provides an injection molding device.

In order to achieve the above purpose, the present application adopts the following technical scheme:

the injection molding device comprises an injection device, a driving piece, a cylinder, a screw rod, a molding die and a demolding mechanism, wherein the discharging end of the injection device is connected with a cylinder material port, the screw rod is arranged in the cylinder along the length direction of the cylinder and driven by the driving piece, a heating device is arranged outside the cylinder, a backflow stopping valve is arranged in the cylinder, one end, far away from the injection device, of the cylinder is provided with a cylinder nozzle, the cylinder nozzle is connected with the molding die, the molding die is connected with the demolding mechanism, and the molding die is also connected with a cooling system;

the forming die and the demoulding mechanism are positioned in the supporting guide seat, the outer side walls of the forming die and the demoulding mechanism are in close contact with the inner side walls of the supporting guide seat, a preheating pipe is wound in the supporting guide seat, the water inlet end of the preheating pipe is connected with a cooling system, an opening and closing valve is arranged between the cooling system and the preheating pipe, the water outlet end of the preheating pipe is communicated with a circulating pipe, the circulating pipe is wound in a heating device, and an electromagnetic valve and a driving water pump are arranged on the circulating pipe;

the screw rod is wound with a heat conducting wire along the spiral direction of the screw rod, one end of the heat conducting wire is fixed on the screw rod, the other end of the heat conducting wire extends to the cylinder material opening and is wound on the inner side wall of the cylinder material opening, and meanwhile the other end of the heat conducting wire extends towards the inner side wall of the injection device and is attached to the inner side wall of the injection device.

Further, the device also comprises a controller, wherein the controller is electrically connected with the driving piece, the heating device and the demoulding mechanism cooling system.

Further, the heating device comprises a plurality of heaters and a cylinder heat preservation layer, wherein the heaters are sequentially arranged at equal intervals along the length direction of the cylinder, and the heat preservation layer covers the heaters.

Further, the circulation pipe is sequentially wound in order between every two heaters outside the heaters to form a full winding of the circulation pipe along the heaters.

Further, the cylinder nozzle is fixed on an outer frame of the forming die, and a nozzle heat insulation layer surrounds the outer side of the cylinder nozzle.

Further, an intermediate circulation conduit is arranged outside the nozzle of the cylinder, the intermediate circulation conduit is connected between the preheating pipe and the circulation pipe, and the intermediate circulation conduit is arranged in the nozzle heat-insulating layer.

Further, the heat conducting wire in the injection device comprises at least two main wires uniformly arranged along the height direction of the inner side wall of the injection device and a coiling wire which is arranged between the main wires and is attached to the inner side wall of the injection device.

Further, the heat conducting wire is made of aluminum alloy.

Further, the device also comprises a working seat, wherein the cylinder, the injection device, the forming die and the demoulding mechanism are all positioned on the working seat;

the cylinder is connected to the working seat through the supporting seat.

Compared with the prior art, the application has the beneficial effects that:

(1) According to the application, the circulating connection among the circulating pipe, the middle circulating pipe and the preheating pipe is arranged, the heating device on the cylinder is utilized to provide heat sources for the liquid circulation in the three pipelines so as to realize the heat support of the cylinder nozzle, the forming die and the demoulding mechanism, and the heat generated by the heating device is transferred to the cylinder nozzle and the injection device through the heat conducting wires arranged on the screw rod, the cylinder nozzle and the injection device, so that the arrangement of the pipeline circulation and the heat conducting wires realizes the heat supply for each part by utilizing one heat source, thereby being beneficial to saving energy;

(2) According to the application, the temperature of the cylinder material opening is kept by utilizing the heat transfer of the heat conducting wire, so that the material opening is prevented from being blocked, and the working efficiency is improved;

(3) According to the application, the preheating of the injection device is realized by utilizing the heat transfer of the heat conducting wire, so that the stirring and mixing effects are improved, and the quality of a finished product is improved;

(4) In the application, the forming die and the demoulding mechanism are preheated by utilizing the heat transfer from the circulating pipe to the preheating pipe, so that the condition of poor forming quality caused by sudden cooling of the molten material entering the forming die is avoided, and the quality of a finished product is improved;

(5) According to the application, the cylinder nozzle is fixedly arranged, and the heat transfer from the circulating pipe to the middle circulating pipe is utilized, so that the temperature of the nozzle is kept, and the condition that the quality of a finished product is influenced due to the fact that the temperature of the nozzle is too low is avoided.

Drawings

FIG. 1 is a schematic diagram of the overall structure of the present application;

FIG. 2 is a schematic diagram of the connections between the cooling system, the preheating pipe, the intermediate circulation pipe and the circulation pipe according to the present application;

fig. 3 is a schematic diagram of a connection structure of a screw, a cylinder port, and a heat conducting wire 19 disposed in an injection device 1 according to the present application.

In the figure: 1. an injection device; 2. a driving member; 3. a cylinder; 4. a screw; 5. a forming die; 6. a demoulding mechanism; 7. a heating device; 8. a heater; 9. a cylinder heat-insulating layer; 10. a backflow prevention valve; 11. a cylinder nozzle; 12. a cooling system; 13. supporting a guide seat; 14. a preheating tube; 15. opening and closing the valve; 16. a circulation pipe; 17. an electromagnetic valve; 18. driving a water pump; 19. a heat conducting wire; 20. a main line; 21. coiling; 22. a controller; 23. a nozzle thermal insulation layer; 24. an intermediate circulation conduit; 25. a working seat; 26. and a supporting seat.

Detailed Description

The following description of the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present application, but not all embodiments.

Referring to fig. 1, an injection molding apparatus includes an injection apparatus 1, a driving member 2, a cylinder 3, a screw 4, a heating device 7, a molding die 5, and a demolding mechanism 6.

The injection molding process is generally: raw materials are put into the injection device 1, the injection device 1 injects the raw materials into the cylinder 3 through a cylinder material port, the raw materials entering the cylinder 3 are melted into molten materials under the action of the heating device 7, the driving piece 2 drives the screw 4 to rotate, the molten materials are conveyed forwards under the spiral conveying of the screw 4, the molten materials are injected between the forming die 5 and the demoulding mechanism 6 through the cylinder nozzle 11 for cooling forming, after the cooling forming, the demoulding mechanism 6 is far away from the forming die 5, and the cooling forming piece falls from the forming die 5 to obtain a finished product, so that the injection forming is completed.

Specifically, injection device 1, vertical setting is the churn structure of back taper, establishes the stirring thick liquid in to make the raw materials obtain mixing stirring in injection device 1, injection device 1's unloading end is connected in cylinder 3's feed opening department, and injection device 1 and cylinder feed opening department are equipped with the control valve, in order to control whether injection device 1 injects the raw materials in the cylinder feed opening.

The cylinder 3 is transversely arranged, is in a barrel-shaped structure, the screw 4 is arranged in the cylinder 3 along the length direction of the cylinder 3, the screw 4 is driven by the driving piece 2, preferably, the driving piece 2 adopts a driving motor, the driving motor is arranged outside the cylinder 3, the heating device 7 is used for melting and improving the temperature in the cylinder 3 so as to melt raw materials entering the cylinder 3, one end, far away from the injection device 1, of the cylinder 3 is provided with a cylinder nozzle 11, the cylinder 3 is internally provided with a backflow stopping valve 10, and the backflow stopping valve 10 is used for preventing backflow of the molten materials.

The cylinder nozzle 11 is connected with the forming die 5, a channel is arranged between the cylinder nozzle 11 and the forming die 5, so that molten materials in the cylinder 3 enter the forming die 5 through the cylinder nozzle 11 and the channel, the forming die 5 is connected with the demolding mechanism 6, the forming die 5 is also connected with a cooling system 12, and the cooling system 12 is used for cooling the molten materials injected between the forming die 5 and the demolding mechanism 6 to form a formed finished product; wherein, forming die 5 is fixed to be set up, and demoulding mechanism 6 is along the movable setting of horizontal direction.

It should be noted that the specific principles and specific structures of the injection device 1, the cylinder 3, the forming mold 5 and the demolding mechanism 6 belong to the mature prior art, and the technical scheme of the present application does not relate to improvement of the working structure thereof, so the basic principles and basic structures of the several working pieces are not repeated.

In the injection molding process, the quality of the finished product is always poor due to various factors such as blockage of a material opening, too low temperature of a nozzle, too low temperature of a mold and the like, therefore, the application provides a technical scheme to solve the problem of poor finished product caused by certain reasons, and specifically comprises the following steps:

in the application, the injection device also comprises a working seat 25, the cylinder 3, the injection device 1, the forming die 5 and the demoulding mechanism 6 are all arranged on the working seat 25, and the working seat 25 comprises a working table and supporting legs.

The cylinder 3 is connected to the working seat 25 by means of a support seat 26. To ensure stability of the cylinder 3.

The working seat 25 further comprises a supporting guide seat 13, the forming die 5 and the demoulding mechanism 6 are positioned in the supporting guide seat 13, and the outer side walls of the forming die 5 and the demoulding die on the demoulding mechanism 6 are in close contact with the inner side walls of the supporting guide seat 13. Preferably, the forming die 5 is fixed in the supporting guide seat 13, the demoulding mechanism 6 is movably arranged in the supporting guide seat 13, and the supporting guide seat 13 not only can be used for fixing and supporting the forming die 5 and the demoulding mechanism 6, but also can play a role in guiding the movement of the demoulding mechanism 6.

The preheating pipe 14 is wound in the supporting guide seat 13, the preheating pipe 14 is wound in the supporting guide seat 13 in a spring shape, each circle of preheating pipe 14 is in close contact, the water inlet end of the preheating pipe 14 is connected with the cooling system 12, the on-off valve 15 is arranged between the cooling system 12 and the preheating pipe 14, and whether the cooling system 12 is communicated with the preheating pipe 14 or not is controlled through the on-off valve 15.

The water outlet end of the preheating pipe 14 is communicated with the water inlet end of the intermediate circulation pipe 24, the intermediate circulation pipe 24 is wound outside the cylinder nozzle 11 in a spring shape, the water outlet end of the intermediate circulation pipe 24 is communicated with the water inlet end of the circulation pipe 16, the circulation pipe 16 is wound in the heating device 7, the circulation pipe 16 is provided with the electromagnetic valve 17 and the driving water pump 18, and the driving water pump 18 is used for driving to realize water circulation; the water inlet end of the preheating pipe 14 is also communicated with the water outlet end of the circulating pipe 16.

As shown in fig. 2, fig. 2 shows a schematic view of the connections between the cooling system 12, the preheating pipe 14, the intermediate circulation conduit 24 and the circulation pipe 16. Wherein, the arrow points to and represents in the illustration: the preheating pipe 14 corresponds to the supporting guide seat 13, the middle circulating pipe 24 corresponds to the cylinder nozzle 11, and the circulating pipe 16 corresponds to the cylinder 3.

By arranging the preheating pipe 14, the intermediate circulation pipe 24 and the circulation pipe 16, sufficient cold water is introduced into the preheating pipe 14, the intermediate circulation pipe 24 and the circulation pipe 16 through the cooling system 12 in the stage of melting materials in the cylinder 3, and then the on-off valve 15 between the cooling system 12 and the preheating pipe 14 is closed so as to enable the cold water to circulate among the preheating pipe 14, the intermediate circulation pipe 24 and the circulation pipe 16, wherein the circulation purpose is to heat the cold water wound in the circulation pipe 16 outside the heating device 7, absorb heat of the heating device 7 and transfer the heat of the intermediate circulation pipe 24 and the preheating pipe 14.

After circulating hot water in the preheating pipe 14, the preheating pipe is used for increasing the temperature in the supporting guide seat 13, and the supporting guide seat 13 transmits the temperature to the forming die 5 and the demoulding mechanism 6, so that before molten materials are injected into the forming die 5, the molten materials are preheated, and the molten materials are prevented from being suddenly cooled, so that the forming quality of finished products is influenced;

after circulating the hot water in the intermediate circulation duct 24, the heat is transferred to the cylinder nozzle 11 to maintain the temperature of the cylinder nozzle 11, and in the present application, a nozzle heat insulation layer 23 is further provided outside the cylinder nozzle 11, and the intermediate circulation duct 24 is wound around the nozzle heat insulation layer 23. In this way, under the heat transfer of the intermediate circulation duct 24 and the double-layer heat preservation of the nozzle thermal insulation layer 23, the condition that the temperature of the cylinder nozzle 11 is too low is avoided, and the condition that the quality of a finished product is influenced due to the condition is avoided.

In addition, heating device 7 includes a plurality of heaters 8 and cylinder heat preservation 9, and heater 8 are equidistant interval setting in proper order along the length direction of cylinder 3, and preferably, heater 8 can adopt annular heating plate, through the temperature in the heating plate control cylinder 3, and the heat preservation covers outside a plurality of heaters 8. The purpose that the heat preservation set up is used for keeping warm the heat that the heating plate produced to reduce heat loss, the energy saving.

Further, the circulation pipe 16 is sequentially wound in order between every two heaters 8 in between outside the heaters 8 to form a full-scale winding of the circulation pipe 16 around the heaters 8. Thus, the heating area of the circulating pipe 16 can be increased, the heating speed of circulating water in the circulating pipe 16 can be increased, the temperature can be increased, and the rapid heat conduction is facilitated.

In some existing injection molding machines, the transfer of the molten material to the molding die 5 is realized by the cylinder 3 and the cylinder nozzle 11 in the moving process, and the moving cylinder nozzle 11 not only can cause rapid heat loss, but also is unfavorable for heat maintenance, so in the application, the cylinder nozzle 11 is fixed on the outer frame of the molding die 5, and then the heat loss can be effectively reduced and the heat can be effectively maintained by matching with the nozzle heat preservation layer 23 arranged outside the cylinder nozzle 11, thereby having important influence on the quality improvement of the finished product.

In the water circulation structure, the temperature of the heating device 7 on the cylinder 3 is utilized to keep the temperature of the cylinder nozzle 11 and the temperature of the preheating forming die 5 and the demoulding mechanism 6, so that the residual heat except the molten material of the heating device 7 can be effectively utilized, and the utilization of a heat source is improved.

After the preheating is finished, the cylinder 3 injects molten materials into the forming die 5 through the cylinder nozzle 11, at the moment, the improved hot water circulation structure is closed, the preheating is released, the on-off valve 15 between the cooling system 12 and the preheating pipe 14 is opened, and the demoulding is realized by the cooling system 12.

In addition, the screw 4 is wound with a heat conducting wire 19 along the spiral direction, one end of the heat conducting wire 19 is fixed on the screw 4, the other end extends to the cylinder material port and is wound on the inner side wall of the cylinder material port, and the other end extends towards the inner side wall of the injection device 1 and is attached to the inner side wall of the injection device 1.

As shown in fig. 3, fig. 3 is a schematic diagram showing the connection structure of the screw 4, the cylinder port, and the heat conducting wire 19 provided in the injection device 1. Wherein, the arrow points to and represents in the illustration: the first section of the heat conducting wire 19 from left to right corresponds to the screw 4 part, the second section of the heat conducting wire 19 corresponds to the cylinder material port part, and the third section of the heat conducting wire 19 connected with the upper part of the second section corresponds to the injection device 1 part.

Through the arrangement of the screw 4, the cylinder material opening and the heat conducting wires 19 in the injection device 1, after the heating device 7 on the cylinder 3 starts to work, heat is transferred to the heat conducting wires 19 on the screw 4 through the cylinder 3, and the heat conducting wires 19 on the screw 4 transfer the heat to the heat conducting wires 19 in the cylinder material opening and the heat conducting wires 19 in the injection device 1.

Wherein: after heat is transferred by the heat conducting wires 19 in the injection device 1, the temperature in the injection device 1 is increased, the injection device 1 is preheated, when the raw materials are stirred in the injection device 1, the raw materials can be preheated in advance, the mixing of the raw materials can be facilitated, the temperature of the raw materials is increased, and preparation is made for melting the raw materials in the cylinder 3.

After heat is transferred by the heat conducting wires 19 in the cylinder material opening, the temperature of the cylinder material opening is increased, the material opening blocking condition caused by the too low temperature of the material opening can be effectively avoided, and the working efficiency of the whole injection molding can be improved.

To increase the heat transfer rate and range of the heat conducting wire 19 in the injection device 1, the heat conducting wire 19 in the injection device 1 includes at least two main wires 20 uniformly arranged in the height direction of the inner side wall of the injection device 1, and a winding wire 21 interposed between the main wires 20 and attached to the inner side wall of the injection device 1. Preferably, four main lines 20 are provided, and the four main lines 20 are uniformly arranged at equal angles around the inner side wall of the injection device 1. The winding wire 21 is located between the four main wires 20. In this way, the heat transferred from the heat conducting wire 19 is transferred to the coiling wires 21 through the four main wires 20 respectively, so that the inner side wall of the whole injection device 1 can be heated uniformly, the preheating range and the preheating effect are ensured, and the preheating speed is improved.

In order to ensure the heat transfer effect of the heat conducting wire 19, the heat conducting wire 19 is made of aluminum alloy.

Finally, the injection molding device of the application further comprises a controller 22, wherein the controller 22 is arranged on the working seat 25, and the controller 22 is electrically connected with the driving piece 2, the heating device 7 and the cooling system 12 of the demolding mechanism 6. Preferably, the controller 22 adopts a PLC controller 22, and the PLC controller 22 is used for controlling the automation work of each part, so that the automation degree of the whole injection molding device is improved.

The preheating pipe 14, the intermediate circulation pipe 24 and the water circulation in the circulation pipe 16 are used for realizing heat transfer, and the screw 4, the cylinder material port and the heat conducting wire 19 in the injection device 1 are used as the same heat source, so that the preheating or the temperature maintenance of the injection device 1, the cylinder 3 material port, the cylinder nozzle 11 and the forming die 5 by one heat source is realized, and the problem of poor quality of finished products caused by low temperature or large temperature difference is solved.

The foregoing is only a preferred embodiment of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art, who is within the scope of the present application, should make equivalent substitutions or modifications according to the technical scheme of the present application and the inventive concept thereof, and should be covered by the scope of the present application.

Claims

1. Injection moulding device, including injection moulding device (1), driving piece (2), cylinder (3), screw rod (4), forming die (5) and demoulding mechanism (6), cylinder (3) feed inlet is connected to the unloading end of injection moulding device (1), screw rod (4) are installed in cylinder (3) along the length direction of cylinder (3), and screw rod (4) are driven by driving piece (2), heating device (7) are equipped with in cylinder (3) and prevent back flow valve (10), one end that keeps away from injection moulding device (1) on cylinder (3) is cylinder nozzle (11), cylinder nozzle (11) are connected with forming die (5), forming die (5) and demoulding mechanism (6) are connected, forming die (5) still are connected with cooling system (12), its characterized in that:

the forming mold is characterized by further comprising a supporting guide seat (13), wherein the forming mold (5) and the demolding mechanism (6) are positioned in the supporting guide seat (13), the outer side wall of the demolding mold on the forming mold (5) and the demolding mechanism (6) is tightly contacted with the inner side wall of the supporting guide seat (13), a preheating pipe (14) is wound in the supporting guide seat (13), the water inlet end of the preheating pipe (14) is connected with a cooling system (12), an opening and closing valve (15) is arranged between the cooling system (12) and the preheating pipe (14), the water outlet end of the preheating pipe (14) is communicated with a circulating pipe (16), the circulating pipe (16) is wound in the heating device (7), and an electromagnetic valve (17) and a driving water pump (18) are arranged on the circulating pipe (16);

the screw (4) is wound with a heat conducting wire (19) along the spiral direction, one end of the heat conducting wire (19) is fixed on the screw (4), the other end of the heat conducting wire extends to the material opening of the cylinder (3) and is wound on the inner side wall of the material opening of the cylinder (3), and meanwhile, the other end of the heat conducting wire extends towards the inner side wall of the injection device (1) and is attached to the inner side wall of the injection device (1);

an intermediate circulation duct (24) is arranged outside the cylinder nozzle (11), the intermediate circulation duct (24) is connected between the preheating pipe (14) and the circulation pipe (16), and the intermediate circulation duct (24) is arranged in the nozzle heat-insulating layer (23);

the heating device (7) on the cylinder (3) is used as the same heat source for heat transfer realized by water circulation in the preheating pipe (14), the intermediate circulation pipe (24) and the circulation pipe (16) and heat transfer realized by the screw (4), the cylinder material opening and the heat conducting wire (19) in the injection device (1).

2. An injection molding apparatus as claimed in claim 1, further comprising a controller (22), wherein the controller (22) is electrically connected to the driving member (2), the heating device (7), the demolding mechanism (6), and the cooling system (12).

3. An injection molding apparatus according to claim 2, wherein the heating device (7) comprises a plurality of heaters (8) and a cylinder heat-insulating layer (9), the heaters (8) are sequentially equidistantly spaced along the length direction of the cylinder (3), and the heat-insulating layer covers the plurality of heaters (8).

4. An injection molding apparatus according to claim 3, wherein the circulation tube (16) is sequentially wound in an order between every two heaters (8) in between outside the heaters (8) to form a full winding of the circulation tube (16) along the heaters (8).

5. An injection molding apparatus according to claim 4, wherein the cylinder nozzle (11) is fixed to an outer frame of the molding die (5), and a nozzle insulating layer (23) surrounds an outer side of the cylinder nozzle (11).

6. An injection molding apparatus according to claim 1, wherein the heat conducting wire (19) in the injection apparatus (1) comprises at least two main wires (20) uniformly arranged in the height direction of the inner side wall of the injection apparatus (1), and a winding wire (21) interposed between the main wires (20) and attached to the inner side wall of the injection apparatus (1).

7. An injection molding apparatus according to claim 6, wherein the heat conducting wire (19) is made of an aluminum alloy.

8. An injection moulding apparatus according to claim 1, further comprising a working seat (25), wherein the cylinder (3), the injection device (1), the moulding mould (5) and the demoulding mechanism (6) are all located on the working seat (25);

the cylinder (3) is connected to the working seat (25) through a supporting seat (26).