Foam jacking mechanism with automatic comprehensive protection function

Abstract

The utility model discloses an automatic foam ejecting mechanism with a comprehensive protection function, and relates to the technical field of foam product production. The mold comprises a rack, a lower mold and a hydraulic cylinder, the lower mold and the hydraulic cylinder are arranged on the rack, an upper mold connected with the movable end of the hydraulic cylinder is slidably arranged on the rack, an air inlet, a containing cavity and an air outlet which are sequentially communicated are formed in the lower mold, and a plugging piece used for plugging or unplugging the air outlet is arranged in the containing cavity. Air conveying pieces are arranged on the machine frame and the lower die, and air is conveyed into the air inlet holes through the air conveying pieces. The mode that in the prior art, a cooled foam product is pushed out of the top of the mold or pushed out of the mold through an ejector rod or a push rod is abandoned, during demolding, the air outlet hole is unplugged through the plugging piece, air is conveyed into the air inlet hole through the air conveying piece, the air sequentially enters the containing cavity, the air outlet hole and the mold cavity, the foam product is separated from the lower mold, and demolding is completed. Damage of foam products caused by hard contact is avoided, and product quality is not affected.

Description

Technical Field

[0001] This application relates to the technical field of foam product production, and specifically relates to a top foam mechanism with an automatic comprehensive protection function. Background Art

[0002] Foam plastic products have the characteristics of light weight, high energy absorption, and good shock resistance, and are widely used in the packaging of various precision instruments, meters, fruits, and vegetables. When producing foam plastic products, the matured expandable polystyrene beads are filled into a closed mold cavity, and hot steam is passed through the mold cavity within a short time to heat the polystyrene beads. During heating, the blowing agent remaining in the polystyrene volatilizes, and the polystyrene beads soften and expand. Due to the limitation of the mold cavity, the expanded beads fill all the voids and are completely bonded into a whole. After cooling, demolding can be carried out. In the prior art, mainly through a push rod or a push bar, the cooled foam product is pushed out from the top or the mold. During this process, the foam product is easily damaged due to hard contact, thus affecting the product quality. Therefore, a top foam mechanism with an automatic comprehensive protection function is proposed. Utility Model Content

[0003] The purpose of this application is to solve the technical problem that mainly through a push rod or a push bar, the cooled foam product is pushed out from the top or the mold, and during this process, the foam product is easily damaged due to hard contact, thus affecting the product quality. This application provides a top foam mechanism with an automatic comprehensive protection function.

[0004] In order to achieve the above purpose, this application specifically adopts the following technical solutions:

[0005] A top foam mechanism with an automatic comprehensive protection function includes a frame, a lower mold, and a hydraulic cylinder all arranged thereon. An upper mold slidably arranged on the frame is connected to the movable end of the hydraulic cylinder. An air inlet hole, a receiving cavity, and an air outlet hole that are sequentially communicated are opened in the lower mold. A blocking member for blocking or releasing the air outlet hole is arranged in the receiving cavity. An air conveying member is arranged on the frame and the lower mold, and air is conveyed into the air inlet hole through the air conveying member.

[0006] Further, the blocking member includes a limiting rod arranged in the receiving cavity. A blocking plate is slidably arranged on the limiting rod. A compression spring sleeved on the limiting rod is arranged between the blocking plate and the receiving cavity. A blocking block that is inserted and matched with the air outlet hole is arranged on the blocking plate.

[0007] Further, a cross bar is slidably arranged in the receiving cavity. A driving part is arranged on the cross bar and the blocking plate. A driving member is arranged on the upper mold and the cross bar. When the upper mold slides, the cross bar is driven to slide through the driving member, and the blocking plate is driven to slide through the driving part.

[0008] Further, the driving part includes a wedge block arranged on the cross bar. A compression spring sleeved on the cross bar is arranged between the wedge block and the accommodating cavity. A roller in rolling butt joint with the wedge block is rotatably arranged on the sealing plate.

[0009] Further, the driving member includes a vertical rod arranged on the cross bar. A wedge plate is arranged on the vertical rod. A driving wheel in rolling butt joint with the wedge plate is rotatably arranged on the upper mold.

[0010] Further, the air delivery part includes a fixed cylinder arranged on the frame. A piston rod is slidably arranged in the fixed cylinder. An air inlet pipe and a connecting pipe are communicated with the fixed cylinder. One-way valves are arranged on both the air inlet pipe and the connecting pipe and their conduction directions are opposite. The free end of the connecting pipe is communicated with the air inlet hole.

[0011] Further, the free end of the air inlet pipe is configured in an inverted funnel shape and a filter screen is arranged at the port.

[0012] Further, a return spring is arranged between the piston rod and the fixed cylinder. A fixed rod is arranged on the piston rod. A fixed block in abutting connection with the fixed rod is arranged on the upper mold.

[0013] The beneficial effects of the present application are as follows:

[0014] The present application abandons the method of pushing the cooled foam product out from the top or the mold through a push rod or a push bar in the prior art. During demoulding, the air outlet hole is unblocked by the blocking part, and air is conveyed into the air inlet hole through the air delivery part. The air sequentially enters the accommodating cavity, the air outlet hole and the mold cavity, so that the foam product is separated from the lower mold, avoiding damage to the foam product caused by hard contact and not affecting the product quality. Therefore, it is more practical. Description of the Drawings

[0015] Figure 1 is the three-dimensional structure diagram of the present application;

[0016] Figure 2 is the three-dimensional sectional view of the present application;

[0017] Figure 3 is the present application Figure 2 the enlarged view at A in;

[0018] Figure 4 is the present application Figure 2 the enlarged view at B in;

[0019] Figure 5 is the present application Figure 2 the enlarged view at C in;

[0020] Figure 6 is the present application Figure 2 the enlarged view at D in;

[0021] Figure 7 is the enlarged view of the position E in this application Figure 2 .

[0022] Reference numerals: 1, frame; 2, lower die; 3, hydraulic cylinder; 4, upper die; 5, air inlet hole; 6, accommodating cavity; 7, air outlet hole; 8, limiting rod; 9, sealing plate; 10, extrusion spring; 11, sealing block; 12, cross bar; 13, wedge block; 14, compression spring; 15, roller; 16, vertical rod; 17, wedge plate; 18, driving wheel; 19, fixed cylinder; 20, piston rod; 21, air inlet pipe; 22, connecting pipe; 23, one-way valve; 24, filter screen; 25, return spring; 26, fixed rod; 27, fixed block. Specific embodiments

[0023] In order to make the objectives, technical solutions and advantages of the embodiments of this application clearer, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of this application.

[0024] As Figures 1-7 shown, a top foam mechanism with an automatic comprehensive protection function proposed in an embodiment of this application includes a frame 1, a lower die 2 and a hydraulic cylinder 3 both arranged thereon. The lower die 2 is horizontal and fixedly arranged on the frame 1, the hydraulic cylinder 3 is vertical and fixedly arranged on the frame 1. A upper die 4 connected to the movable end of the hydraulic cylinder 3 is slidably arranged on the frame 1. The upper die 4 is horizontal and slides in the vertical direction. The upper die 4 and the lower die 2 can form a sealed die cavity. An air inlet hole 5, an accommodating cavity 6 and an air outlet hole 7 which are sequentially communicated are opened in the lower die 2. The air inlet hole 5, the accommodating cavity 6 and the air outlet hole 7 are distributed from bottom to top in sequence. The air outlet hole 7 is communicated with the die cavity. A blocking member for blocking or releasing the blockage of the air outlet hole 7 is arranged in the accommodating cavity 6. An air conveying member is arranged on the frame 1 and the lower die 2, and air is conveyed into the air inlet hole 5 through the air conveying member;

[0025] In the initial state, the movable end of the hydraulic cylinder 3 retracts, the upper mold 4 moves away from the lower mold 2, and the air outlet hole 7 is unblocked by the blocking member. When in use, the movable end of the hydraulic cylinder 3 extends, driving the upper mold 4 to slide downward until the upper mold 4 and the lower mold 2 form a sealed mold cavity. During this process, the air outlet hole 7 is blocked by the blocking member. Then, the matured expandable polystyrene beads are filled into the sealed mold cavity, and hot steam is passed through the mold cavity within a short period of time to heat the polystyrene beads. During heating, the blowing agent remaining in the polystyrene volatilizes, and the polystyrene beads are softened and expanded by heat. Due to the limitation of the mold cavity, the expanded beads fill all the voids and are completely bonded into a whole. Then, it is cooled and demolded. When demolding, the movable end of the hydraulic cylinder 3 retracts, driving the upper mold 4 to slide upward away from the lower mold 2. The air outlet hole 7 is unblocked by the blocking member, and air is conveyed into the air inlet hole 5 through the air conveying member. The air sequentially enters the accommodating cavity 6, the air outlet hole 7, and the mold cavity, causing the foam product to separate from the lower mold 2 to complete the demolding;

[0026] In summary, the present application abandons the method of pushing the cooled foam product out of the mold from the top or by ejector rods or push rods in the prior art. When demolding, the air outlet hole 7 is unblocked by the blocking member, and air is conveyed into the air inlet hole 5 through the air conveying member. The air sequentially enters the accommodating cavity 6, the air outlet hole 7, and the mold cavity, causing the foam product to separate from the lower mold 2, avoiding damage to the foam product caused by hard contact and not affecting the product quality. Therefore, it is more practical.

[0027] As Figure 3 shown, in some embodiments, the blocking member includes a limiting rod 8 disposed in the accommodating cavity 6. The limiting rod 8 is in the vertical direction and is fixedly arranged in the accommodating cavity 6. A blocking plate 9 is slidably arranged on the limiting rod 8. The blocking plate 9 is in the horizontal direction and slides in the vertical direction. A compression spring 10 sleeved on the limiting rod 8 is arranged between the blocking plate 9 and the accommodating cavity 6. The compression spring 10 is in the vertical direction and is fixedly connected to the accommodating cavity 6 and the blocking plate 9 at both ends respectively. A blocking block 11 that is in plug-in fit with the air outlet hole 7 is arranged on the blocking plate 9. The blocking block 11 is in the vertical direction and is fixedly arranged on the blocking plate 9;

[0028] Referring to the above, in the initial state, the compression spring 10 is in the natural state, and both the blocking plate 9 and the blocking block 11 are away from the air outlet hole 7. When the upper mold 4 slides downward, a driving force is applied to the blocking plate 9 to drive it to slide upward, driving the blocking block 11 to move together, forcing the compression spring 10 to be compressed until the blocking block 11 completely enters the air outlet hole 7, thereby blocking the air outlet hole 7. On the contrary, when demolding, the driving force applied to the blocking plate 9 is withdrawn, the compression spring 10 returns to the natural state, and the blocking plate 9 and the blocking block 11 move downward together due to the elastic potential energy until the blocking block 11 withdraws and moves away from the air outlet hole 7, thereby unblocking the air outlet hole 7.

[0029] AsFigures 2-5 As shown, in some embodiments, a cross bar 12 is slidably disposed in the accommodation cavity 6. The cross bar 12 is in a horizontal direction and slides along the horizontal direction. A driving part is provided on the cross bar 12 and the plugging plate 9, and a driving member is provided on the upper die 4 and the cross bar 12. When the upper die 4 slides, the cross bar 12 is driven to slide by the driving member, and the plugging plate 9 is driven to slide by the driving part.

[0030] Referring to the above, in the initial state, the cross bar 12 is away from the plugging plate 9. When the upper die 4 slides downward, the cross bar 12 is driven to slide closer to the plugging plate 9 by the driving member, and a driving force is applied to the plugging plate 9 through the driving part to drive it to slide upward. Conversely, when the upper die 4 slides upward, the cross bar 12 is driven to slide away from the plugging plate 9 by the driving member, and the driving force applied to the plugging plate 9 is withdrawn through the driving part, so as to realize using the sliding of the upper die 4 as a driving force to drive the plugging member to operate synchronously, and further realize automatic plugging or unplugging of the air outlet 7, with a higher degree of automation.

[0031] As Figures 3-4 shown, in some embodiments, the driving part includes a wedge block 13 provided on the cross bar 12. The wedge block 13 is in a horizontal direction and is fixed on the cross bar 12. A compression spring 14 sleeved on the cross bar 12 is provided between the wedge block 13 and the accommodation cavity 6. The compression spring 14 is in a horizontal direction and is fixedly connected to the wedge block 13 and the accommodation cavity 6 at both ends respectively. A roller 15 that is in rolling contact with the wedge block 13 is rotatably provided on the plugging plate 9, and the roller 15 is in a horizontal direction.

[0032] Referring to the above, in the initial state, the wedge block 13 is away from the roller 15, the compression spring 14 is in a compressed state, and the cross bar 12 is away from the plugging plate 9. When the upper die 4 slides downward, the cross bar 12 is driven to slide closer to the plugging plate 9 by the driving member, the compression spring 14 returns to its natural state, the wedge block 13 approaches and is in rolling contact with the roller 15, and through the transition of the inclined plane, the roller 15 and the plugging plate 9 are driven to move upward together. Conversely, when the upper die 4 slides upward, the cross bar 12 is driven to slide away from the plugging plate 9 by the driving member, the compression spring 14 is compressed, and the wedge block 13 is away from the roller 15 to drive the plugging plate 9 to slide.

[0033] As Figures 2-5 shown, in some embodiments, the driving member includes a vertical rod 16 provided on the cross bar 12. The vertical rod 16 is in a vertical direction and is fixed on the cross bar 12. A wedge plate 17 is provided on the vertical rod 16. The wedge plate 17 is in a vertical direction and is fixed on the vertical rod 16. A driving wheel 18 that is in rolling contact with the wedge plate 17 is rotatably provided on the upper die 4, and the driving wheel 18 is in a horizontal direction.

[0034] Referring to the above, in the initial state, the driving wheel 18 and the wedge plate 17 are in planar rolling contact. When the upper die 4 slides downward, it drives the driving wheel 18 to move downward together. The driving wheel 18 and the wedge plate 17 are in rolling contact. Through the transitional effect of the inclined plane and the elastic potential energy of the compression spring 14, the wedge plate 17, the vertical rod 16, and the cross rod 12 are driven to move together. The cross rod 12 slides closer to the sealing plate 9. Conversely, when the upper die 4 slides upward, it drives the driving wheel 18 to move upward together. Through the transitional effect of the inclined plane, the wedge plate 17, the vertical rod 16, and the cross rod 12 are driven to move together. The cross rod 12 slides away from the sealing plate 9 until the driving wheel 18 and the wedge plate 17 are in planar rolling contact, so as to drive the cross rod 12 to slide when the upper die 4 slides.

[0035] As Figures 6-7 shown, in some embodiments, the air delivery member includes a fixed cylinder 19 provided on the frame 1. The fixed cylinder 19 is in the vertical direction and is fixed on the frame 1. A piston rod 20 is slidably provided in the fixed cylinder 19. The piston rod 20 is in the vertical direction and slides along the vertical direction. An air inlet pipe 21 and a connecting pipe 22 are communicated with the fixed cylinder 19. Check valves 23 are provided on both the air inlet pipe 21 and the connecting pipe 22 and their conduction directions are opposite. External air can only enter the fixed cylinder 19 from the air inlet pipe 21, and the air in the fixed cylinder 19 can only enter the connecting pipe 22. The free end of the connecting pipe 22 is communicated with the air inlet hole 5.

[0036] Referring to the above, in the initial state, the piston rod 20 is close to the air inlet pipe 21. During demolding, the piston rod 20 is driven to slide reciprocally, that is, the piston rod 20 first slides downward away from the air inlet pipe 21. During this process, the inside of the fixed cylinder 19 tends to be in a negative pressure state, and external air enters the fixed cylinder 19 from the air inlet pipe 21. Then the piston rod 20 slides upward to the initial position. During this process, the air in the fixed cylinder 19 is pushed into the connecting pipe 22 and then enters the air inlet hole 5 from the connecting pipe 22, so as to deliver air into the air inlet hole 5.

[0037] As Figure 7 shown, in some embodiments, the free end of the air inlet pipe 21 is configured in an inverted funnel shape and a filter net 24 is provided at the port. The filter net 24 is in the horizontal direction.

[0038] Referring to the above, when external air enters the air inlet pipe 21, the intake air volume can be increased through the inverted funnel shape setting, and dust and impurities can be prevented from entering the air inlet pipe 21 through the setting of the filter net 24.

[0039] As Figures 6-7As shown, in some embodiments, a return spring 25 is provided between the piston rod 20 and the fixed cylinder 19, the return spring 25 is in a vertical direction and the two ends are respectively fixedly connected to the piston rod 20 and the fixed cylinder 19, a fixed rod 26 is provided on the piston rod 20, the fixed rod 26 is in a horizontal direction and fixedly provided on the piston rod 20, and a fixed block 27 that contacts and overlaps with the fixed rod 26 is provided on the upper mold 4, and the fixed block 27 is fixedly provided on the upper mold 4;

[0040] Referring to the above, in the initial state, the return spring 25 is in a natural state, the piston rod 20 is close to the air inlet pipe 21, and the fixed block 27 is away from the fixed rod 26. When the upper mold 4 slides downward, it drives the fixed block 27 to move together. The fixed block 27 and the fixed rod 26 overlap and drive the fixed rod 26 and the piston rod 20 to move downward together. The piston rod 20 slides downward to away from the air inlet pipe 21, and the return spring 25 is squeezed. When the upper mold 4 slides upward, it drives the fixed block 27 to move together, and the return spring 25 is reset to the natural state. The fixed rod 26 and the piston rod 20 move upward together due to elastic potential energy, thereby realizing the sliding of the upper mold 4 as a driving force to drive the gas delivery parts to operate synchronously, thereby realizing automatic air delivery to the air inlet hole 5, and the degree of automation is higher.

[0041] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An automatic foam top mechanism with comprehensive protection function, comprising a frame (1), a lower die (2) and a hydraulic cylinder (3) both arranged thereon, an upper die (4) connected to the movable end of the hydraulic cylinder (3) being slidably arranged on the frame (1), characterized in that: The lower mold (2) is provided with an air inlet hole (5), a receiving cavity (6) and an air outlet hole (7) which are connected in sequence. The receiving cavity (6) is provided with a blocking member for blocking or unblocking the air outlet hole (7). The frame (1) and the lower mold (2) are provided with an air delivery member, through which air is delivered to the air inlet hole (5).

2. The top foam mechanism with automatic full protection function according to claim 1, characterized in that: The blocking member comprises a limiting rod (8) arranged in the accommodating cavity (6), a blocking plate (9) is slidably arranged on the limiting rod (8), an extrusion spring (10) sleeved on the limiting rod (8) is arranged between the blocking plate (9) and the accommodating cavity (6), and a blocking block (11) pluggably matched with the air outlet (7) is arranged on the blocking plate (9).

3. The top foam mechanism with automatic full protection function according to claim 2, characterized in that: A cross bar (12) is slidably arranged in the accommodating cavity (6), a driving unit is arranged on the cross bar (12) and the sealing plate (9), and a driving member is arranged on the upper mold (4) and the cross bar (12). When the upper mold (4) slides, the cross bar (12) is driven to slide by the driving member, and the sealing plate (9) is driven to slide by the driving unit.

4. The top foam mechanism with automatic full protection function according to claim 3, characterized in that: The driving part comprises a wedge block (13) arranged on a cross bar (12); a compression spring (14) sleeved on the cross bar (12) is arranged between the wedge block (13) and the accommodating chamber (6); and a roller (15) rotatably arranged on the blocking plate (9) and rollingly overlapping with the wedge block (13).

5. The top foam mechanism with automatic full protection function according to claim 3, characterized in that: The driving member comprises a vertical rod (16) arranged on the cross rod (12), a wedge plate (17) is arranged on the vertical rod (16), and a driving wheel (18) which is rotatably arranged on the upper mold (4) and rollably overlaps with the wedge plate (17).

6. The top foam mechanism with automatic full protection function according to claim 1, characterized in that: The gas delivery member comprises a fixed cylinder (19) arranged on the frame (1), a piston rod (20) being slidably arranged in the fixed cylinder (19), an air intake pipe (21) and a connecting pipe (22) being connected to the fixed cylinder (19), both the air intake pipe (21) and the connecting pipe (22) being provided with a one-way valve (23) and the conducting directions of the two are opposite, and the free end of the connecting pipe (22) is connected to the air intake hole (5).

7. The automatic full-protection foam top mechanism according to claim 6, characterized in that: The free end of the air inlet pipe (21) is in the shape of an inverted funnel and a filter screen (24) is provided at the port.

8. The automatic full-protection foam top mechanism according to claim 6, characterized in that: A return spring (25) is arranged between the piston rod (20) and the fixed cylinder (19), a fixed rod (26) is arranged on the piston rod (20), and a fixed block (27) which abuts and overlaps with the fixed rod (26) is arranged on the upper mold (4).

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