Reliable mold locking oil cylinder structure and injection molding machine mold locking device thereof

Abstract

The utility model discloses a reliable mould locking oil cylinder structure and an injection molding machine mould locking device thereof, the mould locking oil cylinder structure comprises a piston, a piston rod and a cylinder body, the cylinder body is internally provided with the slidable piston, and the piston is sleeved on the piston rod; a flat key and a flat key fixing ring are further included, the flat key fixing ring is arranged on the lower step face of the fixing plate containing step in a sleeving mode, and the inner ring face of the flat key fixing ring seals the side groove opening of the first flat key containing groove. The piston and the piston rod are connected through the flat key, the flat key is tightly pressed in the first flat key containing groove and the second flat key containing groove through the flat key fixing ring, and the flat key is embedded in the second flat key containing groove of the piston rod, is in non-threaded connection and is even in stress. And the piston is more effectively prevented from loosening, and the connection reliability is higher.

Description

TECHNICAL FIELD

[0001] The utility model relates to injection molding machine technical field, concretely is a reliable mold locking oil cylinder structure and injection molding machine mold locking device thereof. BACKGROUND

[0002] Injection molding machine is a kind of special plastic forming machinery, it is approximately divided into two plate type injection molding machine, horizontal injection molding machine, vertical injection molding machine, angle injection molding machine etc. according to structural form.Injection molding machine injection mold is composed of two parts of movable die and fixed die, movable die is installed on the movable die plate of injection molding machine, fixed die is installed on the fixed die plate of injection molding machine.During injection molding, movable die and fixed die are closed to form pouring system and cavity, and movable die and fixed die are separated to take out plastic products when opening mold.

[0003] And mold locking oil cylinder is mainly responsible for closing mold, and bears the tension and impact of mold;Mold locking oil cylinder generally includes cylinder body, piston rod and piston connected to the piston rod, which can reciprocate inside the cylinder body, one end of the piston rod is fixedly connected with the movable die plate by connecting structure. Among them, the piston can be a nut integrated piston or a piston, nut split type piston, namely independent piston.

[0004] The advantages of nut integrated piston are similar to piston rod integrated piston, but since the nut is threadedly connected with the piston rod, the stress is uneven, and in certain cases, the stress of the nut is amplified, resulting in damage to the threaded structure of the piston rod and the nut, the piston is prone to looseness, and the connection reliability is low.

[0005] Although the piston, nut split type piston does not limit the material of the piston rod and the nut, the cost is moderate, but since the nut is threadedly connected with the piston rod, the disadvantages of threaded connection still exist. INVENTION CONTENTS

[0006] In view of the above defects, the utility model provides a reliable mold locking oil cylinder structure and injection molding machine mold locking device, to solve the problem that the existing piston is only threadedly connected with the piston rod and the nut, and the piston is prone to looseness and low connection reliability.

[0007] To achieve this purpose, the utility model adopts the following technical solutions:

[0008] A solenoid cartridge dust leakage prevention device includes a piston, a piston rod and a cylinder body, the cylinder body is sealed and fitted on the piston rod, the cylinder body is provided with a slidable piston, and the piston is fitted on the piston rod.

[0009] The piston is provided with a fixed plate placement step at one end, an upper step surface of the fixed plate placement step in contact with the piston rod is provided with a first flat key placement groove, the piston rod is provided with a second flat key placement groove, the first flat key placement groove and the second flat key placement groove are corresponding and communicated, and the flat key is embedded in the first flat key placement groove and the second flat key placement groove.

[0010] The flat key fixing ring is sleeved on a lower step surface of the fixed plate placement step, and an inner ring surface of the flat key fixing ring seals a side groove opening of the first flat key placement groove.

[0011] Specifically, a first mounting hole is formed through an end of the flat key fixing ring, a second mounting hole is provided on a lower step surface of the fixed plate placement step of the piston, and the first mounting hole and the second mounting hole are correspondingly arranged; the flat key fixing ring is fixed to the piston by cooperating with a screw through the first mounting hole and the second mounting hole.

[0012] Preferably, the piston rod is provided with a piston mounting portion, a diameter of the piston mounting portion is greater than a rod body diameter of the piston rod, the second flat key placement groove is arranged on the piston mounting portion, and the piston is sleeved on the piston mounting portion.

[0013] Further, an inner ring surface of the other end of the piston is provided with a first sealing ring placement groove, the other end of the piston extends to the rod body outside the piston mounting portion, the first sealing ring placement groove is located at an end of the piston mounting portion, and the first sealing ring placement groove is used for placing a first sealing ring.

[0014] Still further, an end surface of the other end of the piston is provided with a second mounting hole, and the second mounting hole is used for mounting a piston nut.

[0015] The outer ring surface of the piston is provided with a second sealing ring placement groove, and the second sealing ring placement groove is used for placing a second sealing ring.

[0016] More preferably, one end of the flat key fixing ring in contact with the lower step surface of the fixed plate placement step is provided with an inclined surface, the inclined surface is inclined inward from a middle portion of the one end of the flat key fixing ring, and further, the one end of the flat key fixing ring and the fixed plate placement step form a gap.

[0017] More specifically, the front and rear ends of the cylinder body are respectively sealed and sleeved on the piston rod through a front end cover and a rear end cover, the front end of the cylinder body is provided with a front guide sleeve in front of the front end cover, the rear end of the cylinder body is provided with a rear guide sleeve behind the rear end cover, and the front guide sleeve and the rear guide sleeve are sleeved on the piston rod.

[0018] Further, the cylinder is provided with an insertion valve at the front end cover, and a gasket is arranged between the front end cover and the front guide sleeve and sleeved with the piston rod;

[0019] The rear end of the cylinder is further provided with a rear end cover copper sleeve pressing plate sleeved with the piston rod, and the rear guide sleeve is located between the rear end cover and the rear end cover copper sleeve pressing plate.

[0020] Specifically, the mold locking device further comprises a movable mold plate, a fixed mold plate and a rear support, the movable mold plate, the fixed mold plate and the rear support are arranged in sequence, the piston rod is inserted through the movable mold plate, one end of the piston rod is inserted through the fixed mold plate, and the other end of the piston rod is inserted through the rear support, and the front end of the cylinder is fixedly connected with the movable mold plate.

[0021] The technical scheme of the mold locking device can have the following beneficial effects:

[0022] The reliable mold locking oil cylinder structure connects the piston and the piston rod through the flat key, the flat key is tightly pressed in the first flat key placing groove and the second flat key placing groove through the flat key fixing ring, the flat key is embedded in the second flat key placing groove of the piston rod, is not connected through threads, is uniformly stressed, and compared with the structure connected through threads and the piston rod, the flat key can more effectively prevent the piston from loosening and has higher connection reliability. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 is a schematic view of a sectional plane of the mold locking oil cylinder of one embodiment of the mold locking device;

[0024] Figure 2 is an enlarged view of A of Figure 1 ;

[0025] Figure 3 is an assembly structure diagram of the piston and the piston rod of one embodiment of the mold locking device;

[0026] Figure 4 is an assembly structure diagram of the piston and the flat key fixing ring of one embodiment of the mold locking device;

[0027] Figure 5 is a structure diagram of the piston of one embodiment of the mold locking device;

[0028] Figure 6 is a structure diagram of the piston rod of one embodiment of the mold locking device;

[0029] Figure 7 is a structure diagram of the flat key fixing ring of one embodiment of the mold locking device;

[0030] Figure 8 is a structure diagram of the mold locking device of one embodiment of the mold locking device.

[0031] Wherein, piston 1;Piston rod 2;Cylinder 3;Flat key 4;Flat key fixed ring 5;Fixed plate placement step 10;First flat key placement groove 11;Second flat key placement groove 21;Side slot 111;First mounting hole 51;Second mounting hole 12;Piston mounting portion 22;First sealing ring placement groove 13;Second mounting hole 14;Second sealing ring placement groove 15;Inclined surface 52;Front end cover 31;Rear end cover 32;Front guide sleeve 33;Rear guide sleeve 34;Plug valve 35;Gasket 36;Rear end cover copper sleeve pressing plate 37;Moving die plate 6;Fixed die plate 7;Rear support 8. DETAILED DESCRIPTION

[0032] The technical scheme of the present application will be further described below in combination with the drawings and through specific embodiments.

[0033] In the description of the present application, it should be understood that the terms "length", "middle", "upper", "lower", "left", "right", "top", "bottom" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore it cannot be understood as a limitation on the present application.

[0034] In addition, the terms "first", "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined as "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0035] In the description of the present application, it should be noted that, unless otherwise specified and limited, the terms "mounting", "splicing", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected;It can be directly connected, or indirectly connected through an intermediate medium, or the communication between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0036] Example 1

[0037] The present application will be described below in combination with Figures 1 to 8 , a solenoid cylinder dust leakage prevention device, as shown in Figure 1 , comprising a piston 1, a piston rod 2 and a cylinder 3, the cylinder 3 is sealed and fitted on the piston rod 2, the cylinder 3 is provided with a slidable piston 1, and the piston 1 is fitted on the piston rod 2;

[0038] AsFigure 2 and Figure 3 As shown, it also includes a flat key 4 and a flat key fixing ring 5. One end of the piston 1 is provided with a fixing plate placement step 10. The upper step surface of the fixing plate placement step 10 that contacts the piston rod 2 is provided with a first flat key placement groove 11. The piston rod 2 is provided with a second flat key placement groove 21. The first flat key placement groove 11 and the second flat key placement groove 21 correspond to and communicate with each other. The flat key 4 is embedded in the first flat key placement groove 11 and the second flat key placement groove 21.

[0039] The flat key fixing ring 5 is fitted onto the lower step surface of the fixing plate placement step 10, and the inner ring surface of the flat key fixing ring 5 seals the side groove 111 of the first flat key placement groove 11.

[0040] The reliable mold-locking cylinder structure of this embodiment connects the piston 1 and the piston rod 2 via a flat key 4. The flat key 4 is tightly pressed into the first flat key placement groove 11 and the second flat key placement groove 21 by a flat key fixing ring 5. The flat key 4 is embedded in the second flat key placement groove 21 of the piston rod 2. The connection is non-threaded, and the force is evenly distributed. Compared with the structure that is connected by a nut and a threaded connection of the piston rod, it is more effective in preventing the piston from loosening and the connection reliability is higher.

[0041] Specifically, such as Figure 4 and Figure 5 As shown, the end of the key retaining ring 5 has a first mounting hole 51, and the lower step surface of the fixing plate placement step 10 of the piston 1 has a second mounting hole 12. The first mounting hole 51 and the second mounting hole 12 are correspondingly arranged. The key retaining ring 5 is fixed to the piston 1 by screws that engage with the first mounting hole 51 and the second mounting hole 12. The key retaining ring 5 is firmly installed on the fixing plate placement step 10 of the piston 1 by screws, so that the key 4 is tightly pressed into the first key placement groove 11 and the second key placement groove 21, effectively preventing the key 4 from falling off.

[0042] Furthermore, such as Figure 6 As shown, the piston rod 2 is provided with a piston mounting part 22, the diameter of which is larger than the diameter of the piston rod 2. The second flat key placement groove 21 is provided in the piston mounting part 22, and the piston 1 is fitted into the piston mounting part 22. The diameter of the piston mounting part 22 is larger than the diameter of the piston rod 2, so that the piston and piston rod are interference-fitted to prevent the piston from loosening.

[0043] In some embodiments, such as Figure 2As shown, the inner annular surface of the other end of the piston 1 is provided with a first seal ring placement groove 13, the other end of the piston 1 extends to the rod body outside the piston mounting portion 22, the first seal ring placement groove 13 is located at the end of the piston mounting portion 22, and the first seal ring placement groove 13 is used for placing a first seal ring. The first seal ring placed in the first seal ring placement groove 13 seals the end of the piston mounting portion 22 and the inner annular surface of the piston 1.

[0044] Further, as shown in the drawings, Figure 2 As shown, the end surface of the other end of the piston 1 is provided with a second mounting hole 14 for mounting a piston nut; and the outer annular surface of the piston 1 is provided with a second seal ring placement groove 15 for placing a second seal ring.

[0045] The second seal ring placed in the second seal ring placement groove 15 seals the outer annular surface of the piston 1. The other end of the piston 1 can be mounted with a piston nut, which cooperates with the flat key 4 at one end of the piston 1 to improve the connection reliability of the piston 1 and the piston rod 2.

[0046] In other embodiments, as shown in the drawings, Figure 7 As shown, the end of the flat key fixing ring 5 in contact with the lower step surface of the fixing plate placement step 10 is provided with an inclined surface 52, which is inclined inward from the middle of the end of the flat key fixing ring 5, and then the end of the flat key fixing ring 5 and the fixing plate placement step 10 form a gap. The inclined surface 52 can play an avoiding role, which can avoid the transition fillet of the fixing plate placement step 10, so that the end surface of the flat key fixing ring 5 closely adheres to the piston 1, and the two form an integral whole.

[0047] It should be noted that the front and rear ends of the cylinder body 3 are respectively sealed and fitted in the piston rod 2 through the front end cover 31 and the rear end cover 32, the front end of the cylinder body 3 is provided with a front guide sleeve 33 in front of the front end cover 31, and the rear end of the cylinder body 3 is provided with a rear guide sleeve 34 behind the rear end cover 32, and the front guide sleeve 33 and the rear guide sleeve 34 are fitted in the piston rod 2. The front guide sleeve 33 and the rear guide sleeve 34 guide the cylinder body 3 to slide along the piston rod 2 to realize the actions of mold opening and mold locking.

[0048] The cylinder body 3 is provided with an insertion valve 35 at the front end cover 31, and a gasket 36 is further provided between the front end cover 31 and the front guide sleeve 33 and fitted in the piston rod 2.

[0049] Further, the rear end of the cylinder body 3 is further provided with a rear end cover brass sleeve pressing plate 37 fitted in the piston rod 2, and the rear guide sleeve 34 is located between the rear end cover 32 and the rear end cover brass sleeve pressing plate 37. Through the above structure, the sealing performance and structural strength of the two ends of the cylinder body 3 are improved.

[0050] Embodiment 2

[0051] As Figure 8 shown, the injection molding machine clamping device using the reliable clamping cylinder structure described in Embodiment 1 further comprises a movable mold plate 6, a fixed mold plate 7 and a rear support 8, the fixed mold plate 7, the movable mold plate 6 and the rear support 8 are arranged in sequence and arranged oppositely, the piston rod 2 is inserted through the movable mold plate 6, one end of the piston rod 2 is inserted through the fixed mold plate 7, the other end of the piston rod 2 is inserted through the rear support 8, and the front end of the cylinder body 3 is fixedly connected with the movable mold plate 6. Thus, the injection molding machine clamping device of the embodiment realizes the actions of mold opening and clamping between the movable mold plate 6 and the fixed mold plate 7 by sliding the cylinder body 3 along the piston rod 2.

[0052] The technical principles of the utility model are described above in combination with specific embodiments. These descriptions are only for explaining the principles of the utility model, and cannot be interpreted as limiting the protection scope of the utility model in any way. Based on the explanations herein, other specific embodiments of the utility model can be conceived by those skilled in the art without creative labor, and these embodiments will all fall within the protection scope of the utility model.

Claims

1. A reliable mold-locking cylinder structure, comprising a piston, a piston rod, and a cylinder body, wherein the cylinder body is sealed and fitted onto the piston rod, and the piston is slidably disposed within the cylinder body and fitted onto the piston rod, characterized in that: It also includes a flat key and a flat key fixing ring. One end of the piston is provided with a fixing plate placement step. The upper step surface of the fixing plate placement step that contacts the piston rod is provided with a first flat key placement groove. The piston rod is provided with a second flat key placement groove. The first flat key placement groove and the second flat key placement groove correspond to and communicate with each other. The flat key is embedded in the first flat key placement groove and the second flat key placement groove. The flat key fixing ring is fitted onto the lower step surface of the fixing plate placement step, and the inner ring surface of the flat key fixing ring seals the side groove of the first flat key placement groove.

2. A reliable lock cylinder structure according to claim 1, wherein The end of the flat key retaining ring has a first mounting hole, and the lower step surface of the piston fixing plate placement step has a second mounting hole. The first mounting hole and the second mounting hole are correspondingly set. The flat key retaining ring is fixed to the piston by screws that fit into the first mounting hole and the second mounting hole.

3. A reliable lock cylinder structure according to claim 1, wherein The piston rod is provided with a piston mounting part, the diameter of which is larger than the diameter of the piston rod body. The second flat key placement groove is provided in the piston mounting part, and the piston is fitted into the piston mounting part.

4. A reliable lock-off cylinder structure according to claim 3, wherein The inner ring surface of the other end of the piston is provided with a first sealing ring placement groove. The other end of the piston extends to the rod outside the piston mounting part. The first sealing ring placement groove is located at the end of the piston mounting part and is used to place the first sealing ring.

5. A reliable lock cylinder structure according to claim 1, wherein The piston has a second mounting hole on its other end face, which is used to install a piston nut. The piston has a second sealing ring placement groove on its outer ring surface, which is used to place the second sealing ring.

6. A reliable lock-off cylinder structure according to claim 1, wherein The end of the flat key fixing ring that contacts the lower step surface of the fixing plate placement step is provided with an inclined surface. The inclined surface slopes inward from the middle of one end of the flat key fixing ring, thereby forming a gap between one end of the flat key fixing ring and the fixing plate placement step.

7. A reliable lock-off cylinder structure according to claim 1, wherein The front and rear ends of the cylinder are respectively sealed to the piston rod by a front end cover and a rear end cover. A front guide sleeve is provided at the front end of the cylinder in front of the front end cover, and a rear guide sleeve is provided at the rear end of the cylinder behind the rear end cover. Both the front guide sleeve and the rear guide sleeve are fitted onto the piston rod.

8. A reliable lock-off cylinder structure according to claim 7, characterized in that The cylinder body is provided with a cartridge valve on the front end cover, and a gasket that fits with the piston rod is also provided between the front end cover and the front guide sleeve; The rear end of the cylinder is also provided with a rear end cap copper sleeve pressure plate that is fitted with the piston rod, and the rear guide sleeve is located between the rear end cap and the rear end cap copper sleeve pressure plate.

9. An injection molding machine clamping apparatus using the reliable clamping cylinder structure according to any one of claims 1 to 8, characterized in that, It also includes a moving template, a fixed template, and a rear support, which are arranged in sequence and opposite to each other. The piston rod is inserted through the moving template, one end of the piston rod is inserted through the fixed template, and the other end of the piston rod is inserted through the rear support. The front end of the cylinder is fixedly connected to the moving template.

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