Rubber leakage prevention device for axis of injection cylinder of rubber injection machine

Abstract

The utility model is applicable to the technical field of rubber injection presses, and provides a rubber leakage prevention device for an injection cylinder axis of a rubber injection press, which comprises an injection cylinder axis, an injection pipe and at least two teflon sealing rings, the teflon sealing rings are mounted at the head of the injection cylinder axis, the inner diameter of an inner cylinder of the injection pipe is larger than the diameter of the injection cylinder axis, and the teflon sealing rings are mounted at the head of the injection cylinder axis. And the head part of the injection cylinder axis is pressed into the inner wall of the injection pipe. Therefore, the glue leakage prevention device for the axis of the injection cylinder of the rubber injection machine, disclosed by the utility model, can prevent glue from overflowing and is low in cost.

Description

Technical Field

[0001] The utility model relates to the technical field of rubber injection machines, in particular to a device for preventing rubber leakage from the axis of a cylinder of a rubber injection machine. Background Art

[0002] At present, the injection cylinder and axis of the injection molding machine are made of high-hardness alloy steel. The gap between the injection cylinder and the axis is as small as possible by relying on high-precision matching clearance and high wear resistance to prevent the rubber from overflowing in the gap between the two. In actual production, due to the reasons of processing accuracy and assembly accuracy, it is difficult to perfectly ensure the extremely high precision of the gap size of mass-produced machines. To achieve precision, it is necessary to find harder materials and better processing equipment, which will greatly increase the material cost and processing cost, and the effect is not ideal. Because the gap is large, the glue overflow is serious; the gap is small, it will get stuck and the injection action cannot be completed. In addition, the long-term hard friction between the axis and the cylinder wall will also cause wear and grooves, and the same glue overflow is serious, and the service life of the cylinder and the axis is reduced. For users, frequent replacement of the core components of the injection system increases costs and takes time.

[0003] In summary, the existing technology obviously has inconveniences and defects in practical use, so it is necessary to improve it. Utility Model Content

[0004] In view of the above-mentioned defects, the purpose of the utility model is to provide a device for preventing rubber leakage from the axis of the shooting cylinder of a rubber injection machine, which can prevent rubber from overflowing and has low cost.

[0005] In order to achieve the above-mentioned purpose, the utility model provides a device for preventing rubber leakage of the shooting cylinder axis of a rubber injection machine, comprising a shooting cylinder axis, a shooting tube and at least two Teflon sealing rings, the Teflon sealing ring being installed at the head of the shooting cylinder axis, the inner diameter of the inner cylinder of the shooting tube is larger than the diameter of the shooting cylinder axis, and the head of the shooting cylinder axis is pressed into the inner wall of the shooting tube.

[0006] According to the device for preventing rubber leakage from the axis of the shooting cylinder of a rubber injection machine described in the utility model, the inner diameter of the Teflon sealing ring is larger than the outer diameter of the axis of the shooting cylinder.

[0007] According to the rubber injection machine cylinder axis anti-leakage device described in the utility model, the head of the cylinder axis is provided with at least two grooves matching the Teflon sealing ring.

[0008] According to the device for preventing rubber leakage at the axis of the shooting cylinder of a rubber injection machine described in the utility model, the Teflon sealing ring is cut at an angle of 45 degrees and installed in the groove at the axis of the shooting cylinder.

[0009] According to the device for preventing the axis of the shooting cylinder of a rubber injection machine from leaking glue, the cutout of the Teflon sealing ring is bonded with special glue.

[0010] According to the device for preventing the axis of the rubber injection machine cylinder from leaking, the two cutouts of the two adjacent Teflon sealing rings are staggered by 90 degrees.

[0011] According to the device for preventing the axis of rubber injection molding machine cylinder from leaking, the two cutouts of two adjacent Teflon sealing rings are radially staggered by 180 degrees.

[0012] According to the rubber injection machine shooting cylinder axis anti-leakage device described in the utility model, the material hardness of the shooting cylinder axis is lower than the material hardness of the shooting tube, and the shooting cylinder axis is matched with the inner cylinder of the shooting tube with a small gap.

[0013] According to the device for preventing the axis of the rubber injection machine cylinder from leaking, the nozzle of the injection pipe is provided with a taper.

[0014] According to the device for preventing the axis of the rubber injection machine cylinder from leaking, the Teflon sealing ring is retracted in the radial direction.

[0015] The utility model provides a rubber injection machine cylinder axis anti-leakage device, comprising a cylinder axis, a material injection tube and at least two Teflon sealing rings, wherein a Teflon sealing ring is installed at the head of the cylinder axis, and then the head of the cylinder axis is pressed into the inner wall of the material injection tube, and the Teflon sealing ring is clamped between the cylinder axis and the material injection tube. The Teflon sealing ring has high strength and strong wear resistance, and forms a good sealing space between the material injection tube wall and the cylinder axis to prevent the rubber from overflowing. Thus, the rubber injection machine cylinder axis anti-leakage device of the utility model prevents the rubber from overflowing and has low cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the rubber injection machine cylinder axis anti-leakage device of the utility model;

[0017] Figure 2 It is a structural schematic diagram of the shooting cylinder axis of the shooting cylinder axis anti-leakage device of the rubber injection machine of the utility model;

[0018] Figure 3 It is a structural schematic diagram of the material injection pipe of the rubber injection machine cylinder axis anti-leakage device of the utility model;

[0019] Figure 4 It is a structural schematic diagram of a Teflon sealing ring of a rubber injection machine cylinder axis anti-leakage device of the utility model;

[0020] Figure 5It is a structural schematic diagram of the rubber injection machine cylinder axis anti-leakage device and Teflon sealing ring of the utility model;

[0021] Figure 6 It is a structural schematic diagram of the axis of the shooting cylinder provided by the prior art and an enlarged diagram of the wedge-shaped groove on the axis of the shooting cylinder;

[0022] Figure 7 The utility model is a structural schematic diagram of the shooting cylinder axis of the shooting cylinder axis anti-leakage device of the rubber injection machine and an enlarged diagram of the groove on the shooting cylinder axis. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0024] like Figures 1 to 5 As shown, the utility model provides a device 100 for preventing glue leakage from the axis of the shooting cylinder of a rubber injection machine, comprising a shooting cylinder axis 1, a shooting tube 2 and at least two Teflon sealing rings 3. The device 100 is designed to prevent the glue from overflowing from the gap between the axis of the shooting cylinder 1 and the wall of the shooting tube 2 when the shooting tube 2 is injecting glue into the mold of the rubber silicone injection molding equipment. The Teflon sealing ring 3 of this embodiment is provided with four paths. The Teflon sealing ring 3 is installed at the head of the shooting cylinder axis 1. The inner diameter of the inner cylinder of the shooting tube 2 is larger than the inner diameter of the shooting cylinder axis 1. The diameter of the cylinder axis 1 is 0.1mm, the head of the cylinder axis 1 is pressed into the inner wall of the material tube 2, and the Teflon sealing ring 3 is sandwiched between the cylinder axis 1 and the material tube 2. The Teflon sealing ring 3 has high strength and strong wear resistance, and forms a good sealing space between the wall of the material tube 2 and the cylinder axis 1 to prevent the rubber from overflowing. The Teflon sealing ring 3 has good self-lubrication. The cylinder axis 1 will not wear the wall of the material tube 2 even if it reciprocates in the material tube 2 for a long time. There is no need to frequently replace the cylinder axis 1 and the material tube 2, which reduces the cost and time. In addition, since the Teflon material has good non-adhesion to materials such as silicone with relatively soft and high viscosity, the silicone material is easy to adhere to the wall of the material tube 2 in the past, and is brought out by the cylinder axis 1. After the Teflon sealing ring 3 made of Teflon material is used, the edge of the Teflon sealing ring 3 pushes the relatively soft and high viscosity rubber back to the material cavity of the material tube 2, keeping the wall of the material tube 2 clean and without rubber overflow. Figure 6 The prior art rubber injection machine is shown, the head of the cylinder axis 1 is provided with a wedge-shaped groove 12, and there is a small gap between the cylinder axis 1 and the injection tube 2. After long-term use, the injection tube 2 and the cylinder axis 1 will wear and cause the gap to increase, and the rubber will overflow from the gap, which will seriously affect production. Figure 7In one embodiment of the utility model, a groove 11 is provided at the head of the shooting cylinder axis 1 to place a dedicated Teflon sealing ring 3. There is a small gap between the shooting cylinder axis 1 and the shooting tube 2. Since the Teflon sealing ring 3 is elastic, the Teflon sealing ring 3 is pressed against the inner wall of the shooting tube 2 during installation. There is no contact between the shooting cylinder axis 1 and the shooting tube 2, which reduces wear and increases service life. At least one groove 11 is retained at the front end of the shooting cylinder axis 1 where the Teflon sealing ring 3 is installed, which further reduces the possibility of rubber overflow.

[0025] Thus, the rubber injection machine cylinder axis anti-leakage device 100 of the utility model can prevent rubber from overflowing and has low cost.

[0026] Preferably, the inner diameter of the Teflon sealing ring 3 is larger than the outer diameter of the shooting cylinder axis 1. The Teflon sealing ring 3 is installed at the head of the shooting cylinder axis 1. The outer diameter of the Teflon sealing ring 3 needs to be slightly larger than the outer diameter of the shooting cylinder axis 1. During installation, the shooting cylinder axis 1 with the Teflon sealing ring 3 installed is directly pressed into the shooting tube 2. After the shooting cylinder axis 1 is pressed into the shooting tube 2, a small interference fit is formed between the Teflon sealing ring 3 and the shooting tube 2. Since the Teflon material is elastic and has good self-lubricating properties, the Teflon sealing ring 3 can form a good sealing space under the compression of the wall of the shooting tube 2, and the rubber is not easy to overflow. The probability of the rubber overflowing between the shooting cylinder axis 1 and the shooting tube 2 is much smaller than that of the previous mode.

[0027] Preferably, the head of the shooting cylinder axis 1 is provided with at least two grooves 11 matching the Teflon sealing rings 3, and at least two Teflon sealing rings 3 are respectively installed in the two grooves 11 at the head of the shooting cylinder axis 1. In this embodiment, four Teflon sealing rings 3 are provided, and correspondingly, at least four grooves 11 are provided, and four Teflon sealing rings 3 are respectively installed in the four grooves 11.

[0028] Preferably, the Teflon sealing ring 3 is cut obliquely at 45 degrees and installed in the groove 11 of the shooting cylinder axis 1. The 45-degree cut is easy to install and has a stronger bonding.

[0029] Preferably, the cutout of the Teflon sealing ring 3 is bonded with special glue, and the end surface of the cutout at the bonding point is smooth.

[0030] Preferably, the two cutout directions of two adjacent Teflon sealing rings 3 are staggered by 90 degrees.

[0031] Preferably, the two cutouts of two adjacent Teflon sealing rings 3 are radially staggered by 180 degrees to avoid the cutouts being on the same straight line and to increase the distance between the two adjacent cutouts to reduce the leakage of the rubber.

[0032] Preferably, the material hardness of the shooting cylinder axis 1 is lower than the material hardness of the shooting tube 2, the shooting cylinder axis 1 and the inner cylinder of the shooting tube 2 are matched with a small gap, the inner diameter of the Teflon sealing ring 3 is slightly larger than the shooting cylinder axis 1, and the Teflon sealing ring 3 and the tube of the shooting tube 2 have a small interference fit.

[0033] Preferably, the nozzle of the injection tube 2 is provided with a taper 22 , and the taper 22 of the nozzle of the injection tube 2 is designed to facilitate the installation of the Teflon sealing ring 3 .

[0034] Preferably, the Teflon sealing ring 3 is expanded and contracted in the radial direction, and the radial direction of the Teflon sealing ring 3 is compressible. During processing and manufacturing, although the Teflon sealing ring 3 has a large positive tolerance, it can still be smoothly installed during installation. The joint of the Teflon sealing ring 3 is tightly sealed. Under the compression of the wall of the injection tube 2, the Teflon sealing ring 3 can form a good sealing space, and the probability of rubber overflowing from here is much improved compared with the previous mode.

[0035] In summary, the utility model provides a rubber injection machine cylinder axis anti-leakage device, including a cylinder axis, a material injection tube and at least two Teflon sealing rings, a Teflon sealing ring is installed at the head of the cylinder axis, and then the head of the cylinder axis is pressed into the inner wall of the material injection tube, and the Teflon sealing ring is clamped between the cylinder axis and the material injection tube. The Teflon sealing ring has high strength and strong wear resistance, and forms a good sealing space between the material injection tube wall and the cylinder axis to prevent rubber from overflowing. In this way, the rubber injection machine cylinder axis anti-leakage device of the utility model prevents rubber from overflowing and has low cost.

[0036] Of course, the present invention may have many other embodiments. Without departing from the spirit and essence of the present invention, technicians familiar with the field can make various corresponding changes and deformations based on the present invention, but these corresponding changes and deformations should all fall within the scope of protection of the claims attached to the present invention.

Claims

1. A device for preventing rubber leakage from the axis of the cylinder of a rubber injection machine, characterized in that: It includes a shooting cylinder axis, a shooting tube and at least two Teflon sealing rings, the Teflon sealing ring is installed at the head of the shooting cylinder axis, the inner diameter of the inner cylinder of the shooting tube is larger than the diameter of the shooting cylinder axis, and the head of the shooting cylinder axis is pressed into the inner wall of the shooting tube; The head of the shooting cylinder axis is provided with at least two grooves matching the Teflon sealing ring, and the Teflon sealing ring is cut at an angle of 45 degrees and installed in the groove of the shooting cylinder axis.

2. The device for preventing rubber leakage from the cylinder axis of a rubber injection machine according to claim 1, characterized in that: The inner diameter of the Teflon sealing ring is larger than the outer diameter of the axis of the shooting cylinder.

3. The device for preventing rubber leakage from the cylinder axis of a rubber injection machine according to claim 1, characterized in that: The cutout of the Teflon sealing ring is bonded by special glue.

4. The device for preventing rubber leakage from the cylinder axis of a rubber injection machine according to claim 1, characterized in that: The two cutout directions of two adjacent Teflon sealing rings are staggered by 90 degrees.

5. The device for preventing rubber leakage from the cylinder axis of a rubber injection machine according to claim 1, characterized in that: The two cutouts of two adjacent Teflon sealing rings are radially staggered by 180 degrees.

6. The device for preventing rubber leakage from the cylinder axis of a rubber injection machine according to claim 1, characterized in that: The material hardness of the axis of the shooting cylinder is lower than that of the shooting tube, and the axis of the shooting cylinder is matched with the inner cylinder of the shooting tube with a small gap.

7. The device for preventing rubber leakage from the cylinder axis of a rubber injection machine according to claim 1, characterized in that: The pipe mouth of the injection pipe is provided with a taper.

8. The device for preventing rubber leakage from the cylinder axis of a rubber injection machine according to claim 1, characterized in that: The Teflon sealing ring expands and contracts along the radial direction.

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