Cushion expansion die

Abstract

The utility model relates to a cushion expansion die which comprises a base, a lower die holder with a die cavity and an upper die holder with a die cavity, the lower die holder is fixed at the top of the base, the inner bottom wall of the die cavity of the lower die holder is provided with a square-shaped groove, a rectangular top frame capable of being clamped in the square-shaped groove in a matched mode is arranged in the die cavity of the lower die holder, and a driving mechanism is arranged above the base. The upper mold base is arranged over the lower mold base through a driving mechanism, the driving mechanism is used for driving the upper mold base to ascend and descend so as to achieve mold closing and demolding, and an elastic pressing mechanism connected with the rectangular top frame is arranged on the lower mold base. The rectangular top frame is pushed to move upwards through the elastic pressing mechanism, the cushion is pushed out of the mold cavity through jacking of the rectangular top frame, traditional manual pulling is replaced, the auxiliary demolding effect is achieved, time and labor are saved, and efficiency is high. In addition, the rectangular top frame is rectangular, jacking force can be provided for the four sides of the bottom of the cushion, it is guaranteed that the bottom of the cushion is evenly stressed, the demolding effect is improved, meanwhile, the cushion can be prevented from being damaged due to local excessive stress, and the yield is increased.

Description

Technical Field

[0001] The utility model relates to the technical field of seat cushion moulds, in particular to a seat cushion expansion mould. Background Art

[0002] Soft seat cushions are usually made from seat cushion expansion molds. The specific processing method is to pour foaming material into the mold, and then expand it under high temperature and high pressure to form a mold of the desired shape. During the manufacturing process, the liquid foaming material will fill the entire mold space and expand and solidify during the heating process, finally obtaining a seat cushion product with the desired shape and density.

[0003] When demolding the existing cushion expansion mold after the cushion is formed, the molded cushion is mainly manually grabbed and force is applied to pull the cushion out of the mold cavity. However, demolding by manual pulling is not only time-consuming and laborious, but also grabbing a local position on the cushion and applying force to pull the cushion, which causes uneven force on the cushion and is prone to cracking, increasing the probability of producing defective products. Utility Model Content

[0004] The utility model aims to provide a seat cushion expansion mold which can assist demoulding, and effectively solves the problems raised in the above-mentioned background technology.

[0005] In order to achieve the above-mentioned purpose, the utility model provides the following technical solutions.

[0006] A seat cushion expansion mold comprises a base, a lower mold base with a mold cavity and an upper mold base, the lower mold base is fixed on the top of the base, the bottom wall of the mold cavity of the lower mold base is provided with an U-shaped groove, the mold cavity of the lower mold base is provided with a rectangular top frame that can fit into the U-shaped groove, a driving mechanism is provided above the base, the upper mold base is arranged directly above the lower mold base through the driving mechanism, the driving mechanism is used to drive the upper mold base to rise and fall to achieve mold closing and demolding, the lower mold base is provided with a spring-pressing mechanism connected to the rectangular top frame, when the upper mold base is pressed down for mold closing, the spring-pressing mechanism is triggered, and the rectangular top frame is driven to move downward to fit tightly into the U-shaped groove, and the upper surface of the rectangular top frame is kept flush with the bottom wall surface of the mold cavity of the lower mold base, when demolding, the spring-pressing mechanism pushes the rectangular top frame to move upward, and the rectangular top frame pushes the formed seat cushion out of the mold cavity of the lower mold base.

[0007] It can be seen that the rectangular top frame is pushed upward by the elastic pressure mechanism, and the seat cushion is pushed out of the mold cavity by the rectangular top frame, replacing the traditional manual pulling, to achieve the auxiliary demolding effect, saving time and effort, and high efficiency. In addition, the rectangular top frame is rectangular in shape, which can provide a push force on the four sides of the bottom of the seat cushion to ensure that the bottom of the seat cushion is evenly stressed. While improving the demolding effect, it can also avoid local excessive stress on the seat cushion and damage, thereby improving the yield rate. With the help of the gravity of the upper mold base, the elastic force of the elastic pressure mechanism is overcome to reduce the mold closing resistance. When opening the mold, the elastic force of the elastic pressure mechanism assists in pushing the upper mold base up to reduce the mold opening resistance. The mutual cooperation of the upper mold base, the rectangular top frame and the elastic pressure mechanism improves the efficiency and quality of mold closing and opening and reduces energy consumption.

[0008] Furthermore, the driving mechanism includes a vertical frame, a suspension, an electric push cylinder and a connecting arm. The vertical frame is vertically fixed above the base and is located on the rear side of the lower mold base. The suspension is fixed to the top of the driving mechanism and forms an inverted L-shaped structure with the vertical frame. The electric push cylinder is vertically fixed above the suspension, and the telescopic rod of the electric push cylinder extends through and extends to the bottom of the suspension. The connecting arm is vertically fixed to the end of the telescopic rod of the electric push cylinder, and the upper mold base is fixed to the bottom end of the connecting arm.

[0009] Furthermore, the spring pressure mechanism includes a guide rod, a pressure plate, a spring, a side plate and a pressure rod. An inner cavity body with both ends penetrating the outside is provided in the lower mold base below its mold cavity. Two guide holes extending vertically upward and penetrating the U-shaped groove are provided on the top wall of the inner cavity body. The two guide rods are slidably installed in the guide holes one by one. The rectangular top frame is fixed on the top ends of the two guide rods. The pressure plate is arranged in the inner cavity body, and the upper surface is fixed to the bottom ends of the two guide rods. The spring is vertically arranged in the inner cavity body, the top end of the spring is fixed to the lower surface of the pressure plate, and the bottom end is fixed to the bottom wall of the inner cavity body. The two side plates are respectively fixed to the two ends of the pressure plate, and the side plates extend from the side ends of the inner cavity body to the outer side of the lower mold base. Pressure rods extending vertically upward are fixed on the outer ends of the two side plates. Side blocks are fixed on both sides of the upper mold base, and lower pressure rods are fixed on the lower surfaces of the two side blocks. The positions of the lower pressure rods and the pressure rods correspond one by one and are in abutment with each other.

[0010] Furthermore, fixed plates are fixed on both sides of the suspension, and sliding holes are provided on the fixed plates, and sliding rods are slidably installed in the two sliding holes, and the bottom ends of the two sliding rods are fixedly connected to the upper surface of the upper mold base.

[0011] Furthermore, a mounting hole which passes through from top to bottom is provided on the upper die seat, an injection pipe is fixed in the mounting hole, the injection pipe extends to the top of the upper die seat, and a connecting pipe is connected to the bottom end of the injection pipe.

[0012] Furthermore, a one-way valve is installed in the injection pipe, and the connecting pipe is a soft pipe.

[0013] Compared with the prior art, the beneficial effects of the present invention are as follows.

[0014] The utility model uses a spring pressure mechanism to push the rectangular top frame upward, and the rectangular top frame is lifted to push the seat cushion out of the mold cavity, replacing the traditional manual pulling to achieve an auxiliary demoulding effect, saving time and effort, and high efficiency. In addition, the rectangular top frame is rectangular in shape, which can provide a top thrust on the four sides of the bottom of the seat cushion, ensuring that the bottom of the seat cushion is evenly stressed, improving the demoulding effect, and preventing the seat cushion from being damaged due to excessive stress in some parts, thereby improving the yield rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a three-dimensional schematic diagram of the overall structure of the utility model;

[0016] Figure 2 This is one of the schematic cross-sectional views of the local structure of the utility model;

[0017] Figure 3 It is a detailed structural diagram of a rectangular top frame in the utility model;

[0018] Figure 4 It is a detailed structural diagram of the driving mechanism in the utility model;

[0019] Figure 5 This is the second schematic diagram of the local structure section of the utility model.

[0020] In the figure: 1. base; 2. lower die seat; 201. inner cavity; 202. guide hole; 21. U-shaped groove; 22. rectangular top frame; 3. spring-pressing mechanism; 31. guide rod; 32. pressure plate; 33. spring; 34. side plate; 35. pressure rod; 36. side block; 37. lower pressure rod; 4. driving mechanism; 41. stand; 42. suspension; 421. fixed plate; 422. sliding hole; 423. sliding rod; 43. electric push cylinder; 44. connecting arm; 5. upper die seat; 51. mounting hole; 52. injection pipe; 521. one-way valve; 53. connecting pipe. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] See also Figure 1-Figure 5The utility model provides a seat cushion expansion mold, including a base 1, a lower mold base 2 with a mold cavity and an upper mold base 5, the lower mold base 2 is fixed on the top of the base 1, the bottom wall of the mold cavity of the lower mold base 2 is provided with a square groove 21, the mold cavity of the lower mold base 2 is provided with a rectangular top frame 22 that can fit into the square groove 21, a driving mechanism 4 is provided above the base 1, and the upper mold base 5 is arranged directly above the lower mold base 2 through the driving mechanism 4, and the driving mechanism 4 is used to drive the upper mold base The lower die base 2 is provided with a spring pressing mechanism 3 connected with a rectangular top frame 22 when the upper die base 5 is pressed down to close the die, and the spring pressing mechanism 3 is triggered to drive the rectangular top frame 22 to move down and fit tightly into the indented groove 21, and the upper surface of the rectangular top frame 22 is kept flush with the bottom wall surface of the mold cavity of the lower die base 2. When demolding, the spring pressing mechanism 3 pushes the rectangular top frame 22 to move up, and the rectangular top frame 22 pushes the formed seat cushion out of the mold cavity of the lower die base 2.

[0023] When using this mold to produce seat cushions, first the driving mechanism 4 works to drive the upper mold base 5 to press down and fit on the top of the lower mold base 2 to achieve mold closing. When the upper mold base 5 is pressed down to close the mold, the spring-pressing mechanism 3 is triggered, and the rectangular top frame 22 is driven to move down and fit tightly into the indented groove 21, and the upper surface of the rectangular top frame 22 is kept flush with the bottom wall surface of the mold cavity of the lower mold base 2 to ensure the integrity of the inner wall of the mold cavity. Subsequently, the foaming material is injected into the mold cavity, and the foaming material is expanded in the mold cavity to form a seat cushion by increasing the temperature and pressurizing. When demolding, the driving mechanism 4 drives the upper mold base 5 to move up, and the spring-pressing mechanism 3 can push the rectangular top frame 22 to move up, and the seat cushion is lifted out of the mold cavity by the rectangular top frame 22, replacing the traditional manual pulling, thereby achieving an auxiliary demolding effect, saving time and effort, and being highly efficient. In addition, the rectangular top frame 22 is rectangular in shape and can provide a push force on the four sides of the bottom of the cushion to ensure that the bottom of the cushion is evenly stressed, improve the demoulding effect, and avoid damage to the cushion due to excessive stress in some parts, thereby improving the yield rate.

[0024] Specifically, the driving mechanism 4 includes a stand 41, a suspension 42, an electric push cylinder 43 and a connecting arm 44. The stand 41 is vertically fixed above the base 1 and is located on the rear side of the lower mold base 2. The suspension 42 is fixed to the top of the driving mechanism 4 and forms an inverted L-shaped structure with the stand 41. The electric push cylinder 43 is vertically fixed above the suspension 42, and the telescopic rod of the electric push cylinder 43 extends through and extends to the bottom of the suspension 42. The connecting arm 44 is vertically fixed to the end of the telescopic rod of the electric push cylinder 43. The upper mold base 5 is fixed to the bottom end of the connecting arm 44. Through the telescopic operation of the electric push cylinder 43, under the fixed connection action of the connecting arm 44, the upper mold base 5 can be driven to rise and fall synchronously, providing drive for the downward pressing and upward demolding of the upper mold base 5. In addition, the stand 41 and the suspension 42 are arranged in an L-shaped structure on the rear side of the lower mold base 2, which can make room for the other three sides above the base 1, making it convenient to take out the cushion after demolding.

[0025] Specifically, the spring pressure mechanism 3 includes a guide rod 31, a pressure plate 32, a spring 33, a side plate 34 and a pressure rod 35. An inner cavity 201 with both ends penetrating the outside is provided in the lower mold base 2 below its mold cavity. Two guide holes 202 extending vertically upward and penetrating the mouth-shaped groove 21 are provided on the inner top wall of the inner cavity 201. The two guide rods 31 are slidably installed in the guide holes 202 one by one. The rectangular top frame 22 is fixed on the top ends of the two guide rods 31. The pressure plate 32 is arranged in the inner cavity 201, and the upper surface is fixed to the bottom ends of the two guide rods 31. The spring 33 is vertically arranged in the inner cavity 201. The top end of the spring 33 is fixed to the lower surface of the pressure plate 32, and the bottom end is fixed to the inner bottom wall of the inner cavity 201. The two side plates 34 are respectively fixed to the two ends of the pressure plate 32, and the side plates 34 extend from the side ends of the inner cavity 201 to the lower mold base 2 The outer side of the two side plates 34 are fixed with pressure rods 35 extending vertically upward, and side blocks 36 are fixed to the two sides of the upper mold base 5, and lower pressure rods 37 are fixed to the lower surfaces of the two side blocks 36. The lower pressure rods 37 correspond to the positions of the pressure rods 35 one by one and cooperate with each other. When the upper mold base 5 is pressed down, the lower pressure rods 37 on both sides of the upper mold base 5 contact and squeeze the pressure rods 35 one by one, thereby pushing the pressure rods 35, the side plates 34 and the pressure plates 32 downward. At this time, the springs 33 are compressed and stored with energy. At the same time, under the connection action of the guide rods 31, the rectangular top frame 22 is driven to move down and get stuck in the inlet shaped groove 21. When demolding, the lower pressure rods 37 cancel the squeezing of the pressure rods 35, and under the elastic force of the springs 33, the pressure plates 32 and the guide rods 31 are pushed up, thereby pushing the rectangular top frame 22 up, thereby realizing the top pushing of the seat cushion.

[0026] Specifically, fixed plates 421 are fixed on both sides of the suspension 42, and sliding holes 422 are provided on the fixed plates 421, and sliding rods 423 are slidably installed in the two sliding holes 422. The bottom ends of the two sliding rods 423 are fixedly connected to the upper surface of the upper mold base 5. During the lifting and lowering process of the upper mold base 5, the sliding rods 423 can slide synchronously in the sliding holes 422, thereby providing guiding, limiting and supporting effects for the upper mold base 5, ensuring that the lifting and lowering process of the upper mold base 5 is smooth and stable enough.

[0027] Specifically, the upper mold base 5 is provided with a mounting hole 51 which passes through from top to bottom, and an injection tube 52 is fixed in the mounting hole 51. The injection tube 52 extends to the top of the upper mold base 5, and the bottom end of the injection tube 52 is connected to a connecting tube 53. When the mold is closed, a pressure pump is used to transport the foaming material into the connecting tube 53, and the connecting tube 53 guides the foaming material into the injection tube 52, and the injection tube 52 injects the foaming material into the mold cavity to realize material feeding.

[0028] Specifically, a one-way valve 521 is installed in the injection pipe 52 to prevent backflow. The connecting pipe 53 is made of a soft pipe, which has a bendable and deformable effect, and can adapt to the lifting and lowering of the upper mold base 5.

[0029] The above is a detailed description of the utility model in combination with specific embodiments, and it cannot be determined that the specific implementation methods of the present invention are limited to these descriptions. For ordinary technicians in the technical field to which the utility model belongs, making several equivalent substitutions or obvious modifications without departing from the concept of the present invention, and having the same performance or use, should be regarded as belonging to the patent protection scope of the utility model determined by the submitted claims.

Claims

1. A seat cushion expansion mold, comprising a base (1), a lower mold base (2) having a mold cavity, and an upper mold base (5), characterized in that: The lower die base (2) is fixed on the top of the base (1); a U-shaped groove (21) is provided on the bottom wall of the die cavity of the lower die base (2); and a rectangular top frame (22) capable of fitting into the U-shaped groove (21) is provided in the die cavity of the lower die base (2); A driving mechanism (4) is provided above the base (1), and the upper die seat (5) is arranged directly above the lower die seat (2) through the driving mechanism (4), and the driving mechanism (4) is used to drive the upper die seat (5) to rise and fall to achieve mold closing and demolding; The lower die base (2) is provided with a spring-pressing mechanism (3) connected to the rectangular top frame (22); When the upper die base (5) is pressed down to close the mold, the spring pressing mechanism (3) is triggered, driving the rectangular top frame (22) to move downward and fit tightly into the square-shaped groove (21), and the upper surface of the rectangular top frame (22) remains flush with the bottom wall surface of the mold cavity of the lower die base (2); During demoulding, the spring-pressing mechanism (3) pushes the rectangular top frame (22) upward, and the rectangular top frame (22) pushes the formed seat cushion out of the mold cavity of the lower mold base (2).

2. A seat cushion expansion mold according to claim 1, characterized in that: The driving mechanism (4) comprises a stand (41), a suspension (42), an electric push cylinder (43) and a connecting arm (44); The stand (41) is vertically fixed above the base (1) and is located at the rear side of the lower mold base (2); the suspension (42) is fixed at the top end of the driving mechanism (4) and forms an inverted L-shaped structure with the stand (41); The electric push cylinder (43) is vertically fixed above the suspension (42), and the telescopic rod of the electric push cylinder (43) extends through and to the bottom of the suspension (42); The connecting arm (44) is vertically fixed on the end of the telescopic rod of the electric push cylinder (43), and the upper die seat (5) is fixed on the bottom end of the connecting arm (44).

3. A seat cushion expansion mold according to claim 1, characterized in that: The spring-pressing mechanism (3) comprises a guide rod (31), a pressure-bearing plate (32), a spring (33), a side plate (34) and a pressure-bearing rod (35); An inner cavity (201) with both ends penetrating the outside is provided in the lower mold base (2) below the mold cavity, and two guide holes (202) extending vertically upward and penetrating the square-shaped groove (21) are provided on the inner top wall of the inner cavity (201); The two guide rods (31) are slidably installed in the guide holes (202) in a one-to-one correspondence, and the rectangular top frame (22) is fixed on the top ends of the two guide rods (31); The pressure-bearing plate (32) is arranged in the inner cavity (201), and the upper surface is fixed to the bottom ends of the two guide rods (31); The spring (33) is vertically arranged in the inner cavity (201), the top end of the spring (33) is fixed to the lower surface of the pressure-bearing plate (32), and the bottom end is fixed to the inner bottom wall of the inner cavity (201); The two side plates (34) are respectively fixed at two ends of the pressure plate (32), and the side plates (34) extend from the side ends of the inner cavity (201) to the outer side of the lower mold base (2), and pressure rods (35) extending vertically upward are fixed to the outer ends of the two side plates (34); Side blocks (36) are fixed to both sides of the upper die seat (5), and lower pressure rods (37) are fixed to the lower surfaces of the two side blocks (36); The positions of the lower pressure rod (37) and the pressure bearing rod (35) correspond one to one and are in abutment with each other.

4. A seat cushion expansion mold according to claim 2, characterized in that: Fixed plates (421) are respectively fixed on both sides of the suspension (42), and each of the fixed plates (421) is provided with a sliding hole (422) penetrating from top to bottom; A sliding rod (423) is slidably installed in each of the two sliding holes (422), and the bottom ends of the two sliding rods (423) are fixedly connected to the upper surface of the upper die seat (5).

5. The seat cushion expansion mold according to claim 1, characterized in that: The upper die seat (5) is provided with a mounting hole (51) which passes through from top to bottom, and a material injection pipe (52) is fixed in the mounting hole (51), and the material injection pipe (52) extends to the top of the upper die seat (5); The bottom end of the injection pipe (52) is connected to a connecting pipe (53).

6. A seat cushion expansion mold according to claim 5, characterized in that: A one-way valve (521) is installed in the injection pipe (52), and the connecting pipe (53) is a soft pipe.

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