High-speed injection oil cylinder

Abstract

The utility model relates to the technical field of injection oil cylinders, and particularly discloses a high-speed injection oil cylinder which comprises an oil cylinder barrel, an oil cylinder front cover and a piston rod, the oil cylinder front cover is installed at the front end of the oil cylinder barrel, the piston rod is inserted into the oil cylinder barrel, a sealing groove is formed in the outer side of the front end of the oil cylinder barrel, a positioning portion is arranged on the oil cylinder front cover, and the sealing groove is communicated with the positioning portion. The positioning part can wrap the outer side of the front end of the oil cylinder barrel, so that the oil cylinder front cover is installed at the front end of the oil cylinder barrel, the sealing groove plays a sealing role, oil liquid is prevented from spilling out, an injection cavity is formed between the inner wall of the oil cylinder barrel and the piston rod, and an oil inlet is formed in the oil cylinder front cover. The first runner used for communicating the injection cavity with the oil inlet is arranged between the piston rod and the inner wall of the oil cylinder front cover, and the positioning part is attached to the outer side of the oil cylinder barrel and cannot block the first runner, so that the first runner can be formed to be larger, and the injection efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of injection oil cylinders, in particular to a high-speed injection oil cylinder. Background Art

[0002] The injection mechanism is an important component of the injection molding machine. Its injection performance greatly affects the production performance of the injection molding machine. The injection performance is determined by the injection cylinder in the injection mechanism. The injection cylinder generally includes a cylinder barrel and a piston rod. The piston rod is driven to move by introducing hydraulic oil into the injection chamber in the cylinder barrel. Therefore, the speed of introducing hydraulic oil determines the displacement speed of the piston rod, that is, the injection speed of the injection cylinder.

[0003] In the prior art, the outside of the oil cylinder is covered with a shooting platform front plate. Since the length of the shooting platform front plate is consistent with the length of the oil cylinder, the front cover and the rear cover of the oil cylinder can only be buckled on the inside of the oil cylinder. However, since the oil inlet is located on the front cover of the oil cylinder, it is necessary to set a connecting channel between the piston rod and the front cover of the oil cylinder to connect the oil inlet and the injection chamber. However, due to the obstruction caused by the inward protruding part of the front cover of the oil cylinder, the connecting channel is smaller, which leads to a slower liquid inlet speed into the injection chamber and a slow overall injection speed. Summary of the invention

[0004] The utility model is made in consideration of the above-mentioned problems. The purpose of the utility model is to provide a high-speed injection cylinder. The cylinder front cover is buckled onto the outer side of the front end of the cylinder barrel, which can avoid the cylinder front cover from interfering with the first flow channel connecting the injection chamber and the oil inlet, thereby improving the injection efficiency.

[0005] To achieve the above object, the utility model provides a high-speed injection oil cylinder, comprising an oil cylinder barrel, an oil cylinder front cover installed at the front end of the oil cylinder barrel, and a piston rod inserted in the oil cylinder barrel;

[0006] A sealing groove is provided on the outer side of the front end of the oil cylinder barrel, and a positioning portion is provided on the oil cylinder front cover, and the positioning portion covers the outer side of the front end of the oil cylinder barrel so as to install the oil cylinder front cover on the front end of the oil cylinder barrel;

[0007] An injection cavity is provided between the inner wall of the oil cylinder barrel and the piston rod, an oil inlet is provided on the oil cylinder front cover, and a first flow channel for connecting the injection cavity and the oil inlet is provided between the piston rod and the inner wall of the oil cylinder front cover.

[0008] According to the high-speed injection cylinder described above, it also includes a shooting platform front plate, the length of which is smaller than the length of the cylinder barrel, and the shooting platform front plate can be covered on the middle part of the outer side of the cylinder barrel to expose the front and rear ends of the cylinder barrel.

[0009] According to the above-mentioned high-speed injection cylinder, it also includes a cylinder rear cover, and the outer sides of the front end and rear end of the cylinder barrel are provided with the sealing groove. The cylinder rear cover is buckled on the outer side of the rear end of the cylinder barrel, and the cylinder front cover is buckled on the outer side of the front end of the cylinder barrel.

[0010] According to the high-speed injection cylinder described above, a rodless cavity is also provided in the cylinder barrel, an oil unloading port and a second flow channel are provided on the rear cover of the cylinder, the oil unloading port is connected to the rodless cavity through the second flow channel, and one end of the second flow channel can be attached to the side wall of the cylinder barrel.

[0011] The high-speed injection cylinder described above further includes an air filter, which is installed on one side of the cylinder rear cover. The cylinder rear cover is provided with an exhaust duct for connecting the air filter and the rodless chamber.

[0012] According to the high-speed injection cylinder described above, the width of the first flow channel is equal to the width of the injection cavity.

[0013] According to the high-speed injection cylinder described above, a limiting step is provided on the outer side of the piston rod, and the limiting step can abut against the inner wall of the cylinder barrel to limit the piston rod from detaching from the cylinder barrel.

[0014] The utility model has the following beneficial effects:

[0015] 1. The length of the front plate of the shooting platform is set to be lower than the length of the oil cylinder barrel. When the front plate of the shooting platform is covered on the middle part of the oil cylinder barrel, the front and rear ends of the oil cylinder barrel can be exposed. Then, the front cover of the oil cylinder barrel can be buckled to the front outer side of the oil cylinder barrel. Then, the first flow channel for connecting the injection chamber and the oil inlet is not restricted by the front cover of the oil cylinder. The first flow channel can be enlarged, thereby increasing the liquid inlet speed of the injection chamber, thereby improving the injection efficiency.

[0016] 2. The rear cover of the oil cylinder can be buckled onto the outer side of the rear end of the oil cylinder barrel, and the second flow channel used to connect the oil discharge port and the rodless chamber can be attached to the side wall of the oil cylinder barrel. The hydraulic oil in the rodless chamber can be discharged in time to avoid entering the air filter due to squeezing. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a cross-sectional view of the overall structure of the embodiment.

[0018] In the figure:

[0019] 1. Cylinder barrel; 11. Sealing groove; 12. Injection chamber; 13. Rodless chamber; 2. Cylinder front cover; 21. Positioning part; 22. Oil inlet; 23. First flow channel; 3. Piston rod; 31. Limiting step; 4. Shooting platform front plate; 5. Cylinder rear cover; 51. Oil unloading port; 52. Second flow channel; 53. Exhaust duct; 6. Air filter. DETAILED DESCRIPTION

[0020] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0021] like Figure 1 As shown, a high-speed injection cylinder comprises a cylinder barrel 1, a cylinder front cover 2 and a piston rod 3, wherein the cylinder front cover 2 is installed on the front end of the cylinder barrel 1, and the piston rod 3 is inserted in the cylinder barrel 1, wherein a sealing groove 11 is provided on the outer side of the front end of the cylinder barrel 1, and a positioning portion 21 is provided on the cylinder front cover 2, wherein the positioning portion 21 can be covered on the outer side of the front end of the cylinder barrel 1, so that the cylinder front cover 2 is installed on the front end of the cylinder barrel 1, and the sealing groove 11 plays a sealing role to prevent oil from spilling out, an injection cavity 12 is provided between the inner wall of the cylinder barrel 1 and the piston rod 3, an oil inlet 22 is provided on the cylinder front cover 2, and a first flow channel 23 for connecting the injection cavity 12 and the oil inlet 22 is provided between the piston rod 3 and the inner wall of the cylinder front cover 2, since the positioning portion 21 is attached to the outer side of the cylinder barrel 1, it will not cause obstruction to the first flow channel 23, so the first flow channel 23 can be opened larger, thereby improving the injection efficiency.

[0022] In order to reserve installation space on the outside of the front end and the rear end of the cylinder barrel 1, it also includes a shooting platform front plate 4 installed on the cylinder barrel 1. The length of the shooting platform front plate 4 is less than the length of the cylinder barrel 1, and the shooting platform front plate 4 is arranged to cover the middle part of the outside of the cylinder barrel 1, exposing the outside of the front end and the rear end of the cylinder barrel 1, so as to facilitate the installation of the cylinder front cover 2 to the outside of the cylinder barrel 1. Therefore, sealing grooves 11 can be provided on the outside of the front end and the rear end of the cylinder barrel 1, and the cylinder also includes a cylinder rear cover 5, and the cylinder barrel 1 is provided with a seal through the cylinder rear cover 5 and the cylinder front cover 2. The cylinder rear cover 5 can be buckled on the outside of the rear end of the cylinder barrel 1, and the cylinder front cover 2 can be buckled on the outside of the front end of the cylinder barrel 1, so as to distinguish the cylinder front cover 2 and the rear cover in the prior art from being connected to the inner wall of the cylinder barrel 1, and the two sealing grooves 11 are used to provide a sealing effect for the installation of the cylinder front cover 2 and the cylinder rear cover 5.

[0023] A rodless chamber 13 is also provided in the oil cylinder barrel 1. Since the air pressure in the rodless chamber 13 needs to change in real time, an air filter 6 is also required to be provided. The air needs to be discharged or clean air needs to be inhaled. The air filter 6 is fixed to one side of the oil cylinder rear cover 5, and an exhaust duct 53 for connecting the air filter 6 and the rodless chamber 13 is provided on the oil cylinder rear cover 5. The excess gas in the rodless chamber 13 can be discharged through the exhaust duct 53. At the same time, after the injection is completed, the hydraulic oil in the rodless chamber 13 needs to be discharged. Therefore, the exhaust duct 53 is provided on the oil cylinder rear cover 5. 5 is also provided with an oil discharge port 51 and a second flow channel 52, the oil discharge port 51 is connected with the rodless chamber 13 through the second flow channel 52. Since the cylinder rear cover 5 is snapped on the outer side of the rear end of the cylinder barrel 1, there is no need to reserve a connecting portion protruding inward, so there is no obstruction to the second flow channel 52. One end of the second flow channel 52 can be attached to the side wall of the cylinder barrel 1, and the oil at the bottom of the rodless chamber 13 can be discharged. At the beginning of the discharge, the second flow channel 52 starts to work to avoid oil accumulation, and at the same time prevents the oil from entering the exhaust channel 53 due to pressure.

[0024] In this embodiment, the width of the first flow channel 23 is equal to the width of the injection chamber 12, that is, the oil inlet channel of the injection chamber 12 can be maximized and its oil inlet speed can be maximized. Of course, the width of the first flow channel 23 is not limited by the cylinder front cover 2, and its width can be freely selected and designed.

[0025] In order to prevent the piston rod 3 from escaping from the cylinder barrel 1, a limiting step 31 is provided on the outer side of the piston rod 3. The limiting step 31 can abut against the inner wall of the cylinder barrel 1 to limit the piston rod 3 from escaping from the cylinder barrel 1. That is, after the piston rod 3 moves outward a preset distance, the limiting step 31 can abut against the inner wall of the cylinder barrel 1 to limit the piston rod 3 from continuing to move and prevent it from escaping from the cylinder barrel 1.

[0026] The technical solution of the utility model is described in detail above in conjunction with the accompanying drawings, and the described embodiments are used to help understand the idea of ​​the utility model. The specific embodiments described herein are merely examples of the spirit of the utility model. A person skilled in the art of the utility model may make various modifications or supplements to the described specific embodiments or replace them in a similar manner, but this will not deviate from the spirit of the utility model or exceed the scope defined by the attached claims.

[0027] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0028] In addition, in the present invention, the descriptions such as "first", "second", "one", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0029] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the fact that ordinary technicians in the field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

Claims

1. A high-speed injection cylinder, characterized in that: It comprises an oil cylinder barrel, an oil cylinder front cover installed at the front end of the oil cylinder barrel, and a piston rod inserted in the oil cylinder barrel; A sealing groove is provided on the outer side of the front end of the oil cylinder barrel, and a positioning portion is provided on the oil cylinder front cover, and the positioning portion covers the outer side of the front end of the oil cylinder barrel so as to install the oil cylinder front cover on the front end of the oil cylinder barrel; An injection cavity is provided between the inner wall of the oil cylinder barrel and the piston rod, an oil inlet is provided on the oil cylinder front cover, and a first flow channel for connecting the injection cavity and the oil inlet is provided between the piston rod and the inner wall of the oil cylinder front cover.

2. A high-speed injection cylinder according to claim 1, characterized in that: It also includes a shooting platform front plate, the length of which is smaller than the length of the oil cylinder barrel, and the shooting platform front plate can be covered on the middle part of the outer side of the oil cylinder barrel to expose the front end and the rear end of the oil cylinder barrel.

3. A high-speed injection cylinder according to claim 1 or 2, characterized in that: It also includes a cylinder rear cover, and the sealing grooves are provided on the outer sides of the front end and the rear end of the cylinder barrel. The cylinder rear cover is buckled on the outer side of the rear end of the cylinder barrel, and the cylinder front cover is buckled on the outer side of the front end of the cylinder barrel.

4. A high-speed injection cylinder according to claim 3, characterized in that: A rodless cavity is also provided in the oil cylinder barrel, and an oil unloading port and a second flow channel are provided on the rear cover of the oil cylinder. The oil unloading port is connected to the rodless cavity through the second flow channel, and one end of the second flow channel can be attached to the side wall of the oil cylinder barrel.

5. A high-speed injection cylinder according to claim 4, characterized in that: It also includes an air filter, which is installed on one side of the oil cylinder rear cover. The oil cylinder rear cover is provided with an exhaust passage for connecting the air filter and the rodless chamber.

6. A high-speed injection cylinder according to claim 1, characterized in that: The width of the first flow channel is equal to the width of the injection cavity.

7. A high-speed injection cylinder according to claim 1, characterized in that: A limiting step is provided on the outer side of the piston rod, and the limiting step can abut against the inner wall of the oil cylinder barrel to limit the piston rod from being separated from the oil cylinder barrel.

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