Die jacking device for tea forming equipment

Abstract

The utility model provides a mold jacking device for tea forming equipment, and the mold jacking device comprises a bottom plate which is fixedly mounted below a pressing plate of a hydraulic machine through the bottom plate; a backing plate; at least one stopper configured to bounce to stop the operation of the mold when the mold reaches a position below a pressing plate of the hydraulic machine; piston columns at the two ends of the two-way synchronous air cylinder can contract or expand, so that the sliding blocks are close to or away from each other, and the base plate is driven to move between the first position and the second position. According to the mold jacking device for the tea leaf forming equipment, a tea bag can be automatically pressed, the tea bag does not need to be manually placed on an operation table of a hydraulic machine, the safety of the operation equipment is improved, and the influence on the body of an operator is reduced. And damage to mold conveying equipment due to displacement or deformation of the mold caused by stress when the hydraulic machine works is also avoided.

Description

Technical Field

[0001] The present application belongs to but is not limited to the field of tea processing technology, and specifically relates to a mold lifting device for tea forming equipment. Background Art

[0002] The tea products on the market are generally processed by steaming, squeezing or kneading. Among them, Pu'er tea, white tea and black tea all have the tradition of using molds to make their loose tea raw materials into bricks, cakes, and other products with specific appearance shapes, that is, tea molding equipment has become an indispensable equipment in the processing of such products.

[0003] Existing tea-tea forming equipment is semi-automatic equipment, such as a hydraulic press. When using a hydraulic press to press tea bags, the tea bags need to be placed manually on the mold of the hydraulic press operating table, which means that the operator's palms, arms and other body parts will inevitably be exposed to the range of motion of the hydraulic press's moving parts. This human-machine combined production method has great safety hazards and low safety. In addition, because the hydraulic press operating table is fixed in height and the working space is limited, it also has a certain impact and restriction on the operator's physical fitness.

[0004] In addition, qualified tea cakes have a regular shape and uniform thickness, which requires that each tea bag be placed in the center of the mold each time it is pressed. However, due to the limitations of operator proficiency and working space, it is not easy to place the tea bag in the center of the mold, resulting in quality problems such as irregular shapes and uneven thickness in the molded tea cakes, and a low yield rate of tea leaves. Summary of the invention

[0005] In order to solve the above problems, the present application provides a mold lifting device for tea-tea forming equipment. On the one hand, the mold lifting device for tea-tea forming equipment provided by the present application can automatically press the tea bag, and there is no need to manually place the tea bag on the hydraulic press operating table, which improves the safety of the operating equipment and reduces the impact on the operator's body. On the other hand, the mold lifting device for tea-tea forming equipment provided by the present application can fully automatically achieve pressing and improve the yield rate of tea-tea forming.

[0006] In a first aspect, an embodiment of the present application provides a mold lifting device for a tea-leaf forming device, the tea-leaf forming device comprising: a hydraulic press and a conveying device, the conveying device being configured to convey the mold and being located below a pressure plate of the hydraulic press, the mold lifting device comprising: a bottom plate (8), the bottom plate (8) being located at the bottom of the mold lifting device, the mold lifting device being fixedly mounted below the pressure plate of the hydraulic press through the bottom plate (8); a pad (10), the pad (10) being located above the mold lifting device; at least one blocker, the blocker being fixedly mounted on the conveying device and being configured to pop up when the mold reaches a position below the pressure plate of the hydraulic press to block the mold from running; and a bidirectional synchronous cylinder. (13), the bidirectional synchronous cylinder (13) is fixedly mounted on the base plate (8), and the bidirectional synchronous cylinder (13) comprises piston columns (21) respectively located at both ends and sliders (9) respectively fixedly connected to the piston columns (21), wherein the piston columns (21) at both ends of the bidirectional synchronous cylinder (13) can shrink inward or expand outward, so that the sliders (9) move closer to or farther from each other, thereby driving the pad (10) to move between a first position and a second position; in the first position, the pad (10) supports the mold, so that the mold is separated from the conveying chain; in the second position, the upper surface of the pad (10) is lower than the bottom surface of the mold transported by the conveying chain, so that the mold is transported by the conveying chain.

[0007] Optionally, the slider (9) comprises a trapezoidal inclined surface at the top, the trapezoidal inclined surfaces of two sliders (9) are opposite to each other, and the pad (10) is located between the opposite trapezoidal inclined surfaces.

[0008] Optionally, at a first moment, the piston column (21) of the bidirectional synchronous cylinder (13) pulls the slider (9) inward to retract, so that the pad (10) drives the mold to rise to the first position; at a second moment, the piston column (21) of the bidirectional synchronous cylinder (13) pushes the slider (9) to expand outward, so that the pad (10) slides downward to the second position.

[0009] Optionally, the first moment is the moment when the mold reaches under the pressing plate of the hydraulic press, and the second moment is the moment when the hydraulic press completes pressing of the tea bag.

[0010] Optionally, the mold lifting device also includes: at least two groups of guide assemblies (22), the at least two groups of guide assemblies (22) are respectively located on both sides of the bidirectional synchronous cylinder (13), the guide assemblies (22) are fixedly connected to the base plate (8) and movably connected to the pad (10); the at least two groups of guide assemblies (22) are configured to limit the movement of the pad (10) in the horizontal direction.

[0011] Optionally, the pad (10) is provided with a through hole (20); the guide assembly (22) includes a seat bearing (14), a guide column (11) and a sliding guide sleeve (18); the seat bearing (14) is fixedly connected to the base plate (8), and the bottom end of the guide column (11) is connected to the seat bearing (14); the sliding guide sleeve (18) is fixedly connected to the through hole on the lower surface of the pad (10), and the guide column (11) passes through the sliding guide sleeve (18) and the through hole (20) of the pad (10) and is movably connected to the pad (10).

[0012] Optionally, the guide assembly (22) further includes one or more gaskets (15) and a shock-absorbing ring (16); the shock-absorbing ring (16) is arranged around the portion of the guide column (11) close to the pad (10), and the one or more gaskets (15) are located at the upper end and / or the lower end of the shock-absorbing ring (16).

[0013] Optionally, the conveying device is two relatively arranged conveying chains, and the blocker includes a front end blocker and a rear end blocker, which are respectively installed on the two conveying chains and the front end blocker is located in front of the rear end blocker, the front end blocker is used to stop the mold conveyed on the conveying chain, and the rear end blocker is used to prevent the mold from rebounding and shifting when stopped.

[0014] Optionally, the piston rods (21) at both ends of the bidirectional synchronous cylinder (13) are synchronously contracted inwardly or expanded outwardly, and the contraction or expansion distance is consistent.

[0015] Optionally, the corners of the pad (10) corresponding to the trapezoidal inclined surfaces of the slider (9) are rounded.

[0016] Compared with the prior art, this application has the following advantages and positive effects:

[0017] The mold lifting device for tea molding equipment provided in this embodiment can realize that when the lifting device is not working, the mold passes smoothly over the lifting device. When the lifting device is working, the mold is first stopped steadily, and then the mold is lifted off the conveying chain for pressing. After the pressing is completed, the conveying chain smoothly transports the mold out. The mold lifting device also plays a supporting role to prevent the mold from being displaced or deformed by force when the hydraulic press is working, thereby damaging the mold conveying equipment.

[0018] In addition, the lifting and lowering of the pad is achieved through the contraction and expansion of the piston column of the bidirectional synchronous cylinder. It has a simple mechanical structure and few moving parts. It is efficient and stable, meeting the efficient and reliable performance requirements of fully automated production equipment and has high practicality.

[0019] The mold lifting device for tea-tea forming equipment provided in the present application can automatically press tea bags without the need to manually place the tea bags on the hydraulic press operating table, thereby improving the safety of operating equipment and reducing the impact on the operator's body. It can also improve the yield rate of tea-tea forming. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a three-dimensional diagram of a tea-leaf forming device according to the present application;

[0021] Figure 2 is a three-dimensional diagram of a mold lifting device for tea forming equipment according to the present application;

[0022] Figure 3 It is a side view of a mold lifting device for tea forming equipment according to the present application;

[0023] Figure 4 It is a structural schematic diagram of a mold lifting device for tea forming equipment according to the present application being located in a first position;

[0024] Figure 5 It is a structural schematic diagram of the mold lifting device for tea forming equipment according to the present application being located in the second position.

[0025] Reference numerals:

[0026] 1-mould lifting device, 2-hydraulic press pressing station, 3-mould, 4-conveyor chain, 5-hydraulic press plate, 6-hydraulic press cylinder, 7-hydraulic press, 8-bottom plate, 9-slider, 10-pad, 11-guide column, 12-front end blocker, 13-bidirectional synchronous cylinder, 14-seat bearing, 15-gasket, 16-shock absorber ring, 17-trapezoidal block, 18-sliding guide sleeve, 19-rear end blocker, 20-pad through hole, 21-piston column, 22-guide assembly, 23-radius of pad, 24-trapezoidal slope of slider. DETAILED DESCRIPTION

[0027] The present application is further illustrated below through the description of specific implementation methods, but this is not a limitation of the present application. Those skilled in the art can make various modifications or improvements based on the basic ideas of the present application, but as long as they do not deviate from the basic ideas of the present application, they are all within the scope of the present application.

[0028] Figure 1 is a three-dimensional diagram of a tea-leaf forming device according to the present application; Figure 2 is a three-dimensional diagram of a mold lifting device for tea forming equipment according to the present application; Figure 3 It is a side view of a mold lifting device for tea forming equipment according to the present application; Figure 4It is a structural schematic diagram of a mold lifting device for tea forming equipment according to the present application being located in a first position; Figure 5 It is a structural schematic diagram of the mold lifting device for tea forming equipment according to the present application being located in the second position.

[0029] The present application embodiment provides a mold lifting device for tea-leaf forming equipment, which may be a fully automatic tea-leaf forming equipment. Figure 1-Figure 5 As shown, the tea forming equipment according to this embodiment includes: a hydraulic press 7 and a conveying device, the conveying device is configured to convey the mold 3, and the conveying device is located below the pressing plate 5 of the hydraulic press 7. In some embodiments, the conveying device can be two oppositely arranged conveying chains 4, which are respectively located on both sides below the pressing plate 5 of the hydraulic press 7, and a pressing station 2 is arranged in the middle of the two conveying chains 4 and in the middle position below the pressing plate of the hydraulic press 7. The conveying chain 4 inputs and outputs the mold 3 to the pressing station 2.

[0030] The mold lifting device 1 comprises:

[0031] A bottom plate 8, the bottom plate 8 is located at the bottom of the mold lifting device 1, and the mold lifting device 1 is fixedly installed under the pressing plate of the hydraulic press 7, that is, the pressing station, through the bottom plate 8;

[0032] A backing plate 10, wherein the backing plate 10 is located on the upper part of the mold lifting device 1;

[0033] At least one blocker, which is fixedly mounted on the conveying device (conveying chain 4) and is configured to pop up when reaching a position below the pressure plate of the hydraulic press to block the operation of the mold;

[0034] The bidirectional synchronous cylinder 13 is fixedly mounted on the base plate 8 , and comprises piston columns 21 respectively located at two ends and sliders 9 respectively fixedly connected to the piston columns 21 .

[0035] Among them, the piston columns 21 at both ends of the bidirectional synchronous cylinder 13 can shrink inward or expand outward, so that the sliders 9 are closer to or farther away from each other, so as to drive the pad 10 to move between the first position and the second position; in the first position, the pad 10 supports the mold 3, so that the mold 3 is separated from the conveying device; in the second position, the upper surface of the pad 10 is lower than the bottom surface of the mold 3 transported by the conveying device, so that the mold 3 is transported by the conveying device.

[0036] Among them, the mold lifting device 1 of this embodiment can be applied to tea forming equipment. One application scenario is: the mold conveyor chain 4 passes through the hydraulic press operating table, and the tea bag is manually placed on the mold 3 at the front end of the conveyor chain 4. The conveyor chain 4 conveys the mold 3 to the pressing station. The mold lifting device of this embodiment works to lift the mold 3 off the conveyor chain 4. The oil cylinder 6 of the hydraulic press 7 pushes the pressing plate 5 downward to press the tea bag. After the pressing is completed, the oil cylinder 6 pushes the pressing plate 5 upward to return to its original position. Thereafter, the mold lifting device returns to its original position, and the mold 3 falls onto the conveyor chain 4. The conveyor chain 4 transports the mold carrying the tea cake out of the pressing station.

[0037] According to the scheme of this embodiment, when the mold 3 carrying tea leaves is transported to the top of the lifting device 1 via the conveyor chain, the blocker stops the mold 3. At this time, the piston column 21 of the bidirectional synchronous cylinder 13 of the lifting device pulls the slider 9 to shrink inward, and the pad 10 is squeezed by the sliders 9 at both ends, and moves upward along the inclined surface of the slider 9, and finally the pad 10 completely falls to the top of the slider 9. In this process, the mold 3 directly above the lifting device is also lifted with the displacement of the pad 10, and the bottom surface of the mold 3 has completely separated from the conveyor chain 4. When the tea leaves are pressed and formed, because the bottom surface of the mold 3 is higher than the conveyor chain 4, the conveyor chain 4 will not be damaged, and in this process, the entire conveyor chain 4 can operate normally, ensuring the smooth and orderly conveying of the molds at the front and rear ends of the pressing station. When the tea leaves are pressed and formed, the piston column 21 of the bidirectional synchronous cylinder 13 of the jacking device pushes the slider 9 to expand outward, and the pad loses the support of the slider and returns to its original position, that is, the mold 3 also falls onto the conveying chain 4 again, and the synchronous blocker also returns to its original position. The mold 3 loses the blockage on the conveying chain and continues to be conveyed forward.

[0038] Therefore, the mold lifting device for tea molding equipment provided in this embodiment can realize that when the lifting device is not working, the mold passes smoothly from above the lifting device. When the lifting device is working, the mold is first stopped steadily, and then the mold is lifted off the conveyor chain for pressing. After the pressing is completed, the conveyor chain smoothly transports the mold out. The mold lifting device also plays a supporting role to prevent the mold from being displaced or deformed by force when the hydraulic press is working, thereby damaging the mold conveying equipment.

[0039] In addition, the lifting and lowering of the pad is achieved through the contraction and expansion of the piston column of the bidirectional synchronous cylinder. It has a simple mechanical structure and few moving parts. It is efficient and stable, meeting the efficient and reliable performance requirements of fully automated production equipment and has high practicality.

[0040] Therefore, the mold lifting device for tea forming equipment provided by the present application can automatically press the tea bag without manually placing the tea bag on the hydraulic press operating table, thereby improving the safety of the operating equipment and reducing the impact on the operator's body. It can also improve the yield rate of tea forming.

[0041] In some embodiments, at the first moment, the piston column 21 of the bidirectional synchronous cylinder 13 pulls the slider 9 inwardly to retract, so that the pad drives the mold to rise to the first position. The first moment is the moment when the mold reaches below the hydraulic press plate.

[0042] At the second moment, the piston rod 21 of the bidirectional synchronous cylinder 13 pushes the slider 9 to expand outward, so that the pad slides down to the second position. The second moment is the moment when the hydraulic press completes the pressing of the tea bag.

[0043] Specifically, in the second position, the upper surface of the pad 10 may be 1-1.5 cm lower than the bottom surface of the mold 3 transported by the conveyor chain 4 .

[0044] In some embodiments, the piston rods 21 at both ends of the bidirectional synchronous cylinder 13 shrink inward or expand outward synchronously, and the shrinkage or expansion distance is consistent.

[0045] In some embodiments, the slider 9 may include a trapezoidal inclined surface 24 at the upper portion, the trapezoidal inclined surfaces 24 of the two sliders 9 are opposite to each other, and the pad 10 is located between the opposite trapezoidal inclined surfaces 24. The surface of the trapezoidal inclined surface 24 is smooth. The specifications, dimensions and materials of the two sliders 9 are consistent.

[0046] Furthermore, the slider 9 may include an upper part and a lower part. The upper part is a trapezoidal block 17 including a trapezoidal inclined surface 24. The horizontal distances from the trapezoidal inclined surfaces 24 of the sliders at both ends to the rounded corners 23 at both ends of the pad 10 are consistent, and the intervals between the sliders at both ends and the pad 10 are consistent. In addition, when the slider 9 is fully expanded and in the original position, the horizontal distances between the slider trapezoidal inclined surfaces 24 and the lower corners of the pad 10 at both ends are 1-2 cm.

[0047] Furthermore, the angle between the trapezoidal inclined surface of the upper half of the slider 9 and the horizontal plane is preferably 60 to 65 degrees, and the angle between the trapezoidal inclined surface 24 of the upper half of the sliders at both ends and the horizontal plane is consistent. In some embodiments, the corners corresponding to the trapezoidal inclined surface of the pad 10 and the slider 9 are rounded. And the arc of the rounded corners 23 at both ends of the pad 10 is consistent.

[0048] By adopting the above technical solution, the force required by the piston column 21 of the bidirectional synchronous cylinder 13 to pull or push the slider 9 is basically consistent, the force of the sliders 9 at both ends to squeeze the pad 10 is basically consistent, and the friction force on the rounded corners 23 of the pad 10 on the trapezoidal inclined surface of the slider is basically consistent, so that the lifting and falling process of the pad 10 is smooth.

[0049] The upper part of the slider 9, i.e., the part including the trapezoidal inclined surface (the trapezoidal block 17), is made of PO engineering plastic, and the lower part is preferably made of aluminum alloy.

[0050] Therefore, by using wear-resistant and impact-resistant PO engineering plastics for the trapezoidal block 17 of the slider 9, not only the workload of the bidirectional synchronous cylinder is greatly reduced, but also the durability of the jacking device and the stability of the mold lifting are greatly improved. The pad 10 can be made of high-strength aluminum alloy.

[0051] Through the scheme of this embodiment, different parts are combined with different materials, the slider 9 and the pad 10 are reduced in mass and have higher mechanical strength, that is, the workload of the bidirectional synchronous cylinder 13 is significantly reduced. Therefore, the stability and durability of the jacking device are greatly improved.

[0052] In some embodiments, the mold lifting device also includes: at least two groups of guide assemblies 22, the at least two groups of guide assemblies 22 are respectively located on both sides of the bidirectional synchronous cylinder 13, the guide assemblies 22 are fixedly connected to the base plate 8 and movably connected to the pad 10; the at least two groups of guide assemblies 22 are configured to limit the movement of the pad in the horizontal direction.

[0053] Specifically, the pad 10 is provided with a through hole 20; the guide assembly 22 includes a seat bearing 14, a guide column 11 and a sliding guide sleeve 18; the seat bearing 14 is fixedly connected to the bottom plate 8, and the bottom end of the guide column 11 is connected to the seat bearing 14; wherein, the connection may be fixed. The guide column 11 is fixed in position but can rotate freely.

[0054] The sliding guide sleeve 18 is fixedly connected to the through hole on the lower surface of the backing plate 10 , and the guide column 11 passes through the sliding guide sleeve 18 and the through hole 20 of the backing plate 10 and is movably connected to the backing plate 10 .

[0055] Since the bottom end of the guide column 11 of the guide assembly 22 is fixed on the seat bearing 14, the guide column 11 can rotate freely in the horizontal direction. The sliding guide sleeve 18 of the guide assembly 22 is fixedly installed on the lower surface of the pad 10, and the inner diameter of the sliding guide sleeve 18 is slightly larger than the diameter of the guide column 11.

[0056] Due to the limitation of the guide assembly 22, the pad 10 can only move in the vertical direction, so during the lifting and lowering process, the pad 10 will not be displaced or misaligned.

[0057] Therefore, by setting the guide assembly, the pad can be lifted smoothly, effectively solving the problem of misalignment and displacement of the pad during lifting and falling. That is, the mold can be lifted smoothly away from the conveyor chain, and the tea leaves carried by it will not be displaced, ensuring a high qualified rate of the molded products. When the pad falls, the mold falls smoothly onto the conveyor chain directly below and is smoothly output, ensuring the efficiency and smoothness of the entire fully automated production process.

[0058] In some embodiments, the guide assembly 22 also includes one or more gaskets 15 and a shock absorbing ring 16; the shock absorbing ring 16 is arranged around the portion of the guide column 11 close to the pad 10, and the one or more gaskets 15 are located at the upper end and / or lower end of the shock absorbing ring 16.

[0059] Furthermore, a gasket 15 is inserted into each of the upper and lower positions of the shock absorbing ring 16 .

[0060] Furthermore, the inner diameter of the two gaskets 15 of the guide assembly 22 is slightly larger than the diameter of the guide column 11, and can move up and down after being inserted into the guide column 11. A shock-absorbing ring 16 is inserted in the middle of the two gaskets 15. The inner diameter of the shock-absorbing ring 16 is slightly larger than the diameter of the guide column 11, and the outer diameter of the shock-absorbing ring 16 is smaller than the outer diameter of the two gaskets 15.

[0061] In addition, the damping ring 16 and the gasket 15 are inserted in the middle position between the seat bearing 14 and the sliding guide sleeve 18, which effectively improves the durability of the mold lifting device 1. Specifically, when the pad 10 falls, due to the effect of the damping ring 16, the hard contact between the sliding guide sleeve 18 of the guide assembly 22 and the seat bearing 14 is effectively avoided, thereby significantly improving the durability of each component.

[0062] In some embodiments, the conveying device is two relatively arranged conveying chains 4, and the blocker includes a front end blocker 12 and a rear end blocker 19, the front end blocker 12 and the rear end blocker 19 are respectively installed on the two conveying chains 4, and the front end blocker 12 is located in front of the rear end blocker 19 (diagonal position), the front end blocker 12 is used to stop the mold 3 conveyed on the conveying chain 4, and the rear end blocker 19 is used to prevent the mold 3 from rebounding and shifting when stopped.

[0063] The working state of the mold lifting device 1 of this embodiment is described in detail below.

[0064] Further reading Figure 5, the piston column 21 of the bidirectional synchronous cylinder 13 pushes the slider 9 to expand outward to the original position, and the pad 10 is at the lowest position. At this time, the mold 3 can smoothly pass through the mold lifting device 1, which is the second position. When the mold 3 is transported to the top of the lifting device 1 through the conveyor chain 4, the spring piece of the front blocker 12 pops up to stop the mold, and synchronously, the spring piece of the rear blocker 19 pops up to prevent the mold from rebounding. For further reference Figure 4 The piston column 21 of the bidirectional synchronous cylinder 13 pulls the slider 9 inward and contracts. The pad 10 is squeezed by the sliders 9 at both ends and moves up along the inclined surface of the trapezoidal block on the upper half of the slider 9 until the pad 10 completely falls to the top surface of the slider 9. In this process, the mold 3 located directly above the pad 10 is also lifted up as the pad 10 moves upward, and then the bottom surface of the mold 3 is higher than the top surface of the conveyor chain 4. This is the first position.

[0065] Afterwards, if Figure 1 As shown, when the hydraulic press plate 5 moves downward to press the material on the mold 3, the conveyor chain 4 will not be crushed. When the pressing is completed, the slider 9 is pushed outward to the original position by the piston rod 21 of the bidirectional synchronous cylinder 13, as shown in FIG. Figure 5 As shown, at this time, the pad 10 loses the support of the sliders 9 at both ends and falls to the lowest position. Simultaneously, the mold 3 also falls onto the conveyor chain 4, and simultaneously, the front end blocker 12 spring piece is retracted to the original position to break the blockage of the mold 3, and the mold 3 will continue to be conveyed to the next process.

[0066] It is to be understood that the above embodiments are merely exemplary embodiments used to illustrate the principles of the present application, but the present application is not limited thereto. For those skilled in the art, various modifications and improvements can be made without departing from the spirit and substance of the present application, and these modifications and improvements are also considered to be within the scope of protection of the present application.

Claims

1. A mold lifting device for tea forming equipment, characterized in that: The tea forming equipment comprises: a hydraulic press and a conveying device, wherein the conveying device is configured to convey a mold and is located below a pressing plate of the hydraulic press, and the mold lifting device comprises: A bottom plate (8), the bottom plate (8) being located at the bottom of the mold lifting device, and the mold lifting device being fixedly installed below the pressure plate of the hydraulic press through the bottom plate (8); A backing plate (10), wherein the backing plate (10) is located on the upper part of the mold lifting device; At least one stopper, which is fixedly mounted on the conveying device and is configured to pop up when the mold reaches a position below the platen of the hydraulic press to stop the mold from running; A bidirectional synchronous cylinder (13), wherein the bidirectional synchronous cylinder (13) is fixedly mounted on the base plate (8), and comprises piston rods (21) respectively located at two ends and sliders (9) respectively fixedly connected to the piston rods (21). The piston columns (21) at both ends of the bidirectional synchronous cylinder (13) can shrink inward or expand outward, so that the sliders (9) move closer to or farther from each other, thereby driving the pad (10) to move between a first position and a second position; in the first position, the pad (10) supports the mold so that the mold is separated from the conveyor chain; in the second position, the upper surface of the pad (10) is lower than the bottom surface of the mold transported by the conveyor chain, so that the mold is transported by the conveyor chain.

2. The mold lifting device according to claim 1, wherein: The slider (9) comprises a trapezoidal inclined surface at the upper part, the trapezoidal inclined surfaces of the two sliders (9) are opposite to each other, and the pad (10) is located between the opposite trapezoidal inclined surfaces.

3. The mold lifting device according to claim 1, wherein: At the first moment, the piston column (21) of the bidirectional synchronous cylinder (13) pulls the slider (9) inwardly to retract, so that the pad (10) drives the mold to rise to the first position; At the second moment, the piston column (21) of the bidirectional synchronous cylinder (13) pushes the slider (9) to expand outward, causing the pad (10) to slide downward to the second position.

4. The mold lifting device according to claim 3, wherein: The first moment is the moment when the mold reaches below the pressing plate of the hydraulic press, and the second moment is the moment when the hydraulic press completes pressing of the tea bag.

5. The mold lifting device according to claim 1, wherein: The mold lifting device also includes: At least two groups of guide assemblies (22), the at least two groups of guide assemblies (22) are respectively located on both sides of the bidirectional synchronous cylinder (13), the guide assemblies (22) are fixedly connected to the bottom plate (8) and movably connected to the backing plate (10); the at least two groups of guide assemblies (22) are configured to limit the movement of the backing plate (10) in the horizontal direction.

6. The mold lifting device according to claim 5, wherein: The backing plate (10) is provided with a through hole (20); The guide assembly (22) comprises a seat bearing (14), a guide column (11) and a sliding guide sleeve (18); The seat bearing (14) is fixedly connected to the bottom plate (8), and the bottom end of the guide column (11) is connected to the seat bearing (14); The sliding guide sleeve (18) is fixedly connected to the through hole on the lower surface of the backing plate (10), and the guide column (11) passes through the sliding guide sleeve (18) and the through hole (20) of the backing plate (10) to be movably connected to the backing plate (10).

7. The mold lifting device according to claim 6, wherein: The guide assembly (22) further comprises one or more gaskets (15) and a shock absorbing ring (16); The shock absorbing ring (16) is arranged around the portion of the guide column (11) close to the pad (10). The one or more gaskets (15) are located at the upper end and / or the lower end of the shock absorbing ring (16).

8. The mold lifting device according to claim 1, wherein: The conveying device is two conveying chains arranged opposite to each other. The blocker includes a front blocker and a rear blocker, the front blocker and the rear blocker are respectively installed on two conveying chains and the front blocker is located in front of the rear blocker. The front end blocker is used to stop the mold being transported on the conveying chain, and the rear end blocker is used to prevent the mold from rebounding and shifting when stopped.

9. The mold lifting device according to claim 1, wherein: The piston rods (21) at both ends of the bidirectional synchronous cylinder (13) are synchronously contracted inwardly or expanded outwardly, and the contraction or expansion distance is consistent.

10. The mold lifting device according to claim 2, wherein: The corners of the pad (10) corresponding to the trapezoidal inclined surfaces of the slider (9) are rounded.

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