Template hinged support capable of reducing oil leakage during injection molding of PET (Polyethylene Terephthalate) foamed sheet

Abstract

The utility model relates to the technical field of injection molding machines, and particularly discloses a template hinged support for reducing oil leakage during injection molding of a PET foamed sheet, which comprises a bottom plate, a pin support, an oil storage assembly and a connecting pin, the bottom plate is detachably connected to the template; the pin support is fixedly connected to the side, away from the formwork, of the bottom plate, and a pin hole is formed in the pin support. The oil storage assembly is arranged in the pin hole and used for storing lubricating oil. The connecting pin rotatably penetrates through the pin hole, and the side wall of the connecting pin slidably abuts against the hole wall of the pin hole and the oil storage assembly. The mold plate hinge seat has the effects that the probability of dry grinding caused by oil leakage on the surface of the connecting pin in the mold plate hinge seat during injection molding is reduced, and the service life of the connecting pin is prolonged.

Description

Technical Field

[0001] This application relates to the technical field of injection molding machines, and in particular to a template hinge seat for reducing oil leakage during injection molding of PET foam sheets. Background Technology

[0002] The mold plate hinge is an important component in an injection molding machine. It connects the rear mold plate and the moving mold plate of the injection molding machine. In conjunction with the action of the clamping mechanism hinge, it realizes the opening and closing of the mold to ensure the normal operation of the injection molding process.

[0003] When injection molding PET foam sheets, a large clamping force is required to close the mold and reduce the probability of injection material leakage from the mold plate. After long-term use of a large clamping force, the gap between the connecting pin and the pin hole of the mold plate hinge will increase. This causes the lubricating oil between the connecting pin and the pin hole wall to be squeezed out under the action of the large clamping force. The lubricating oil cannot be replenished to the gap between the connecting pin and the pin hole in time, and the connecting pin is prone to dry friction, thereby reducing the service life of the connecting pin. Utility Model Content

[0004] In order to reduce the probability of dry grinding caused by oil leakage on the surface of the connecting pin inside the template hinge during injection molding and to increase the service life of the connecting pin, this application provides a template hinge that reduces oil leakage during injection molding of PET foam sheets.

[0005] The template hinge provided in this application for reducing oil leakage during injection molding of PET foam sheets adopts the following technical solution:

[0006] A template hinge for reducing oil leakage during injection molding of PET foam sheets includes:

[0007] The base plate is detachably connected to the template.

[0008] A pin support is fixedly connected to the side of the base plate away from the template, and the pin support has a pin hole.

[0009] An oil storage assembly is disposed within the pin hole, and the oil storage assembly is used to store lubricating oil;

[0010] A connecting pin is rotatably inserted into the pin hole, and the side wall of the connecting pin slides against the wall of the pin hole and the oil storage assembly.

[0011] By adopting the above technical solution, the base plate provides support by connecting with the template, the pin support connects with the connecting pin by opening a pin hole, the oil storage component stores lubricating oil and provides lubrication for the connection between the connecting pin and the pin support by abutting against the connecting pin. When the pressure on the connecting pin is too high, the connecting pin presses the oil storage component, forcing out the lubricating oil stored in the oil storage component, and finally allowing the lubricating oil to enter between the connecting pin and the pin support, thereby achieving the effect of lubricating the connecting pin. This reduces the probability of dry friction caused by oil leakage on the surface of the connecting pin in the template hinge seat during injection molding, and increases the service life of the connecting pin.

[0012] Optionally, an oil storage groove is coaxially formed on the wall of the pin hole, and the oil storage assembly is connected to the inner wall of the oil storage groove. One end of the oil storage assembly facing the pin hole is located inside the pin hole, and the oil storage assembly is retractable.

[0013] By adopting the above technical solution, the oil reservoir provides a placement position for the oil storage component and a space for the lubricating oil. The oil storage component is installed in the oil reservoir and one end is set in the pin hole. When the connecting pin is installed in the pin hole, the oil storage component contracts and releases the stored lubricating oil, thereby achieving the lubrication effect on the connecting pin. When the connecting pin is subjected to increased force and moves, the moving connecting pin will compress the oil storage component, thereby causing the lubricating oil stored in the oil storage component to be released, reducing the probability of the lubricating oil applied to the connecting pin separating due to the force on the connecting pin.

[0014] Optionally, the oil storage assembly includes an oil storage sponge and an oil delivery pipe. The oil delivery pipe has several oil drain holes in its wall. The oil storage sponge blocks the oil drain holes, and one end of the oil storage sponge facing away from the oil delivery pipe is placed inside the pin hole.

[0015] By adopting the above technical solution, the oil pipeline contains lubricating oil, and the oil storage sponge contacts the oil pipeline through the oil drain hole, thereby storing the lubricating oil in the oil storage sponge. The oil storage sponge abuts against the connecting pin, thereby coating a layer of lubricating oil on the surface of the connecting pin. When the connecting pin is subjected to excessive force and causes displacement, the oil storage sponge can squeeze out the stored lubricating oil under the pressure of the connecting pin, increasing the amount of lubricating oil on the side wall of the connecting pin, reducing the probability of the connecting pin being worn due to excessive pressure on the connecting pin causing the lubricating oil on the side wall of the connecting pin to be squeezed out.

[0016] Optionally, the side wall of the pin support is provided with an oil delivery hole, the oil delivery hole is connected to the oil storage tank, and the oil delivery pipe is arranged in the oil delivery hole.

[0017] By adopting the above technical solution, the oil supply hole opened on the side wall of the pin support can deliver lubricating oil into the oil supply pipe through the oil supply hole, thereby replenishing the lubricating oil in the oil supply pipe.

[0018] Optionally, a number of isolation blocks are fixedly connected inside the oil storage tank, and a number of blocks are provided on the oil storage sponge. The isolation blocks are used to isolate adjacent oil storage sponges.

[0019] By adopting the above technical solution, the oil-storing sponges are isolated by the isolation blocks, and the isolation blocks provide support for the connecting pins. This results in the connecting pins having multiple lubricating oil storage cavities on their side walls. When the connecting pins shift in any direction, the isolation blocks can reduce the shift amplitude of the connecting pins by providing support, and the oil-storing sponges can replenish lubricating oil in the direction of the shift, reducing the probability of wear on the connecting pins.

[0020] Optionally, the thickness of the sidewall of the pin support away from the pin hole is increased at both ends along the pin hole layout direction.

[0021] By adopting the above technical solution, the thickening of both ends of the pin support can better resist the deflection of the connecting pin and reduce the probability of the connecting pin deflection.

[0022] Optionally, the pin support is connected to a support rib at the connection point with the base plate, and the arrangement direction of the support rib is perpendicular to the opening direction of the pin hole.

[0023] By adopting the above technical solution, the support rib provides additional support for the pin support, increases the pin support's load-bearing capacity, and reduces the probability of the pin support being damaged by force.

[0024] Optionally, the connecting pin is fitted with a lubricating sleeve, which abuts against the oil reservoir assembly.

[0025] By adopting the above technical solution, the lubricating sleeve fitted on the connecting pin avoids the probability of direct contact between the connecting pin and the pin support, thereby reducing the probability of damage to the pin support.

[0026] Optionally, two pin supports are arranged at parallel intervals.

[0027] By adopting the above technical solution, two pin supports are arranged, thereby providing support through the two pin supports, further improving the support capacity and increasing the fault tolerance rate when the pin supports are damaged.

[0028] Optionally, bolt through holes are provided at all four corners of the base plate, and the base plate is connected to the template by bolts.

[0029] By adopting the above technical solution, the base plate is connected to the template by bolt holes at the four corners, which improves the stability of the connection between the base plate and the template and achieves a stable connection between the base plate and the template.

[0030] Compared with the prior art, this application includes at least one of the following beneficial technical effects:

[0031] 1. The base plate provides support for the pin support by connecting with the template. The pin support completes the installation of the connecting pin through the opened pin hole. The connecting pin abuts against the oil storage component, and the oil storage component applies lubricating oil to the surface of the connecting pin. When the connecting pin is subjected to excessive force and its position is displaced, the connecting pin presses against the oil storage component, squeezing out the lubricating oil stored in the oil storage component. This reduces the probability of oil leakage and dry friction on the surface of the connecting pin in the template hinge during injection molding, and increases the service life of the connecting pin.

[0032] 2. The oil reservoir inside the pin support provides a place for the oil reservoir assembly. The lubricating oil is placed in the oil reservoir. When the connecting pin is installed, the connecting pin compresses the oil reservoir assembly, and then the lubricating oil in the oil reservoir assembly is squeezed out and applied to the surface of the connecting pin. When the connecting pin is subjected to excessive force and its position is displaced, the connecting pin compresses the oil reservoir assembly, and the lubricating oil in the oil reservoir assembly is squeezed out, reducing the probability of direct contact between the connecting pin and the pin support, thereby reducing the probability of the connecting pin being damaged.

[0033] 3. The isolation block separates adjacent oil reservoir sponges and provides support for the connecting pin. When the connecting pin shifts, each oil reservoir sponge becomes an independent oil storage space. When the connecting pin shifts in different directions, the oil reservoir sponge will squeeze out the stored lubricating oil, reducing the probability of damage to the connecting pin. Attached Figure Description

[0034] Figure 1 This is a schematic diagram of the external structure of Embodiment 1 of this application.

[0035] Figure 2 This is a schematic diagram of the internal structure of the pin hole in Embodiment 1 of this application.

[0036] Figure 3 This is a cross-sectional view of the internal structure in Embodiment 1 of this application.

[0037] Figure 4 yes Figure 3 Enlarged structural diagram of part A.

[0038] Figure 5 This is a structural schematic diagram of Embodiment 2 of this application.

[0039] In the diagram: 1. Base plate; 11. Bolt through hole; 2. Pin support; 21. Pin hole; 22. Oil reservoir; 23. Oil delivery hole; 3. Oil storage assembly; 31. Oil storage sponge; 32. Oil delivery pipe; 321. Oil drain hole; 4. Connecting pin; 5. Isolation block; 6. Support rib; 7. Lubrication sleeve. Detailed Implementation

[0040] The following is in conjunction with the appendix Figure 1-5 This application will be described in further detail.

[0041] Example 1

[0042] This application discloses a template hinge seat for reducing oil leakage during injection molding of PET foam sheets.

[0043] Reference Figure 1 and Figure 2 A template hinge for reducing oil leakage during injection molding of PET foam sheets includes a base plate 1, a pin support 2, an oil storage assembly 3, and a connecting pin 4.

[0044] The base plate 1 is detachably connected to the template. One side of the pin support 2 is fixedly connected to the side of the base plate 1 away from the template. The pin support 2 has a pin hole 21. The oil storage component 3 is arranged in the pin hole 21. The connecting pin 4 passes through the pin hole 21. The side wall of the connecting pin 4 abuts against the inner wall of the pin hole 21 and the end of the oil storage component 3 away from the wall of the pin hole 21.

[0045] Reference Figure 2 and Figure 3 The base plate 1 is detachably connected to the template, which facilitates the replacement and maintenance of the template hinge. The connecting pin 4 is connected through the pin hole 21 opened in the pin support 2. The connecting pin 4 abuts against the oil storage component 3. When the connecting pin 4 is subjected to excessive force and shifts in position, the connecting pin 4 will press the oil storage component 3, thereby squeezing out the lubricating oil stored in the oil storage component 3. The lubricating oil is coated on the surface of the connecting pin 4 to replenish the lubricating oil on the surface of the connecting pin 4, reducing the probability of oil leakage and dry friction on the surface of the connecting pin 4 in the template hinge during injection molding, and increasing the service life of the connecting pin 4.

[0046] Bolt through holes 11 are provided at each of the four corners of the base plate 1. The base plate 1 and the template are bolted together through the bolt through holes 11 at the four corners. The base plate 1 is bolted to the template through the bolt through holes 11 at the four corners to complete the positioning of the base plate 1.

[0047] Reference Figure 3 and Figure 4 An oil storage groove 22 is provided on the inner wall of the pin hole 21. The oil storage groove 22 is coaxially arranged with the pin hole 21. The oil storage component 3 is arranged in the oil storage groove 22. The oil storage component 3 includes an oil storage sponge 31 and an oil delivery pipe 32. The oil delivery pipe 32 is close to the bottom end of the oil storage groove 22. Several oil drain holes 321 are provided on the side of the oil delivery pipe 32 facing the pin hole 21. Several oil storage sponges 31 are arranged. Several oil storage sponges 31 abut against the oil drain holes 321. The end of the oil storage sponge 31 away from the oil delivery pipe 32 is located in the pin hole 21.

[0048] The oil reservoir 22 inside the pin hole 21 stores lubricating oil by placing an oil reservoir sponge 31 and an oil supply pipe 32. The lubricating oil in the oil supply pipe 32 enters the oil reservoir sponge 31 through the oil drain hole 321 and is stored in the oil reservoir sponge 31 under normal conditions. The oil reservoir sponge 31 is positioned inside the pin hole 21 at one end. When the connecting pin 4 is installed, the connecting pin 4 presses the oil reservoir sponge 31, squeezing out the lubricating oil stored in the oil reservoir sponge 31 and applying it to the surface of the connecting pin 4. The lubricating oil in the oil reservoir sponge 31 is always saturated. When the position of the connecting pin 4 shifts, the oil reservoir sponge 31 can sense the amount of shift and squeeze the lubricating oil stored in the oil reservoir sponge 31 to wet the surface of the connecting pin 4, reducing the probability of dry friction of the connecting pin 4.

[0049] Reference Figure 3 and Figure 4 Several isolation blocks 5 are arranged inside the oil storage tank 22. Adjacent oil storage sponges 31 are separated by isolation blocks 5. The side wall of the isolation block 5 is fixedly connected to the tank wall of the oil storage tank 22. The side of the isolation block 5 facing the pin hole 21 abuts against the side wall of the connecting pin 4.

[0050] The insulating block 5 inside the oil reservoir 22 isolates the adjacent oil reservoir sponges 31, so that the oil reservoir sponges 31 form different oil reservoir units. This reduces the interference of gravity on the lubricating oil stored in the oil reservoir sponges 31, which causes the oil reservoir sponges 31 below the connecting pin 4 to be in a saturated state and the oil reservoir sponges 31 above the connecting pin 4 to be in an unsaturated state. This reduces the probability of dry friction occurring above the connecting pin 4.

[0051] Reference Figure 1 and Figure 3 The side wall of the pin support 2 is provided with an oil delivery hole 23, which is connected to the oil storage tank 22 and the oil delivery hole 23 is connected to the oil delivery pipe 32. The input end of the oil delivery pipe 32 is located in the oil delivery hole 23.

[0052] The pin support 2 replenishes lubricating oil into the oil supply pipe 32 through the oil supply hole 23. The lubricating oil in the oil supply pipe 32 keeps the lubricating oil in the oil storage sponge 31 saturated, thereby reducing the probability that the oil storage sponge 31 will fail to replenish the lubricating oil on the surface of the connecting pin 4 in time when the lubricating oil in the oil storage sponge 31 decreases and causes the connecting pin 4 to shift.

[0053] Reference Figure 1 and Figure 2 The side walls of the pin support 2 are thickened at both ends along the opening direction of the pin hole 21. The side walls of the pin support 2 are connected to the support ribs 6. The bottom end of the support ribs 6 is fixedly connected to the base plate 1. The arrangement direction of the support ribs 6 is perpendicular to the opening direction of the pin hole 21.

[0054] By thickening the side walls at both ends, the pin support 2 reduces the probability of the pin support 2 shifting due to the force exerted by the connecting pin 4. The support rib 6 enhances the compressive strength of the pin support 2 by connecting the base plate 1 and the pin support 2, thus reducing the probability of the pin support 2 being damaged.

[0055] Two pin supports 2 are arranged in parallel at intervals. The two pin supports 2 provide two fulcrums to support the connecting pin 4, which improves the fault tolerance rate of the pin supports 2 in case of damage.

[0056] The implementation principle of the template hinge seat for reducing oil leakage during injection molding of PET foam sheets in this application embodiment is as follows: The base plate 1 is connected to the template to provide support. The pin support 2 has a pin hole 21. The connecting pin 4 passes through the pin hole 21 to connect with the pin support 2. The part of the connecting pin 4 located in the pin hole 21 abuts against the oil storage component 3. When the connecting pin 4 is subjected to excessive force and shifts, the connecting pin 4 presses the oil storage component 3, squeezing out the lubricating oil in the oil storage component 3. This increases the amount of lubricating oil applied to the surface of the connecting pin 4, thereby reducing the probability of oil leakage and dry friction on the surface of the connecting pin 4 in the template hinge seat during injection molding, and increasing the service life of the connecting pin 4.

[0057] Example 2

[0058] Compared to Embodiment 1, the difference in this embodiment is that: (Referring to...) Figure 5 The connecting pin 4 is fitted with a lubricating sleeve 7, which abuts against the oil reservoir 3. The lubricating sleeve 7 avoids direct contact between the connecting pin 4 and the pin support 2, thereby reducing the probability of wear on the connecting pin 4.

[0059] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A template hinge seat for reducing oil leakage during injection molding of PET foam sheets, characterized in that, include: The base plate (1) is detachably connected to the template; The pin support (2) is fixedly connected to the side of the base plate (1) away from the template, and the pin support (2) has a pin hole (21). An oil storage assembly (3) is disposed in the pin hole (21), and the oil storage assembly (3) is used to store lubricating oil; A connecting pin (4) is rotatably inserted into the pin hole (21). The side wall of the connecting pin (4) slides against the hole wall of the pin hole (21) and the oil storage assembly (3). An oil storage groove (22) is coaxially opened on the hole wall of the pin hole (21). The oil storage assembly (3) is connected to the inner wall of the oil storage groove (22). One end of the oil storage assembly (3) facing the pin hole (21) is located inside the pin hole (21). The oil storage assembly (3) is retractable. The oil storage assembly (3) includes an oil storage sponge (31) and an oil delivery pipe (32). The pipe wall of the oil delivery pipe (32) is provided with a plurality of oil drain holes (321). The oil storage sponge (31) blocks the oil drain holes (321). One end of the oil storage sponge (31) away from the oil delivery pipe (32) is set in the pin hole (21). The oil storage tank (22) is fixedly connected with several isolation blocks (5), and the oil storage sponge (31) is provided with several blocks. The isolation blocks (5) are used to isolate adjacent oil storage sponges (31).

2. The template hinge seat for reducing oil leakage during injection molding of PET foam sheets according to claim 1, characterized in that: The side wall of the pin support (2) is provided with an oil delivery hole (23), which is connected to the oil storage tank (22), and the oil delivery pipe (32) is arranged in the oil delivery hole (23).

3. A template hinge seat for reducing oil leakage during injection molding of PET foam sheets according to claim 1, characterized in that: The thickness of the side wall of the pin support (2) away from the pin hole (21) is increased at both ends along the arrangement direction of the pin hole (21).

4. A template hinge seat for reducing oil leakage during injection molding of PET foam sheets according to claim 1, characterized in that: The pin support (2) is connected to a support rib (6) at the connection of the base plate (1), and the arrangement direction of the support rib (6) is perpendicular to the opening direction of the pin hole (21).

5. A template hinge seat for reducing oil leakage during injection molding of PET foam sheets according to claim 1, characterized in that: The connecting pin (4) is fitted with a lubricating sleeve (7), which abuts against the oil storage component (3).

6. A template hinge seat for reducing oil leakage during injection molding of PET foam sheets according to claim 1, characterized in that: The pin support (2) is arranged in parallel at intervals.

7. A template hinge seat for reducing oil leakage during injection molding of PET foam sheets according to claim 1, characterized in that: The base plate (1) has bolt through holes (11) at all four corners, and the base plate (1) is connected to the template by bolts.

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