Foam forming machine and forming process

Abstract

The invention relates to the technical field of foam forming, and provides a foam forming machine and a forming technology.The foam forming machine comprises a mounting rack and a mold, and the mold comprises two forming mold bases; mold grooves are formed in the side walls of the two forming mold bases, and when the two forming mold bases are attached to each other, the mold grooves of the two forming mold bases are combined to form a mold cavity; a first pushing rod is arranged between each forming die holder and the mounting rack, one end of each first pushing rod is in sliding connection with the mounting rack, and the other end of each first pushing rod penetrates into the corresponding forming die holder and is connected with a first pushing head; the first pushing rod is provided with a first driving ring, the first driving ring is used for being pushed by the forming die bases to drive the first pushing rod to slide, when the two forming die bases are attached to each other, gaps exist between the forming die bases and the first driving ring, and the distance between the forming die bases and the first driving ring is not smaller than the maximum depth of the die groove. According to the foam forming machine, the operation convenience of separation between a foam product and the mold can be improved.

Description

Technical Field

[0001] The present application relates to the technical field of foam molding, and in particular to a foam molding machine and a molding process. Background Art

[0002] As an efficient production tool, foam molding machines are widely used in packaging, construction, automobiles, electronics and other fields. Its working principle is to inject foaming agent into raw materials, expand them through chemical reaction to form foam particles, and then send these foam particles into the mold cavity to fuse under the action of heating and pressure. After cooling and molding, open the mold to take out the foam product. This molding method greatly improves production efficiency and product quality with its high efficiency and precision.

[0003] In practical applications, in order to solve the adhesion problem between foam products and molds, various ejection devices are usually used to realize the demolding of foam products. Common ejection devices include hydraulic cylinders, air cylinders, springs, etc., which push the foam products out of the mold by applying force. Specifically, hydraulic cylinders can provide a large ejection force and are suitable for large foam products; air cylinders are widely used due to their fast response characteristics, especially suitable for small or lightweight foam products; spring ejection devices are simple, reliable, and low-cost, but may not be stable enough in large sizes or under heavy loads.

[0004] Although there are many types of existing ejection devices, there are still some shortcomings. In particular, during the ejection process, the ejection device is complex in structure and inconvenient to operate, which often causes damage to the foam product during ejection. Therefore, how to design an ejection device with a simple structure, convenient operation and effective avoidance of damage to the foam product has become a technical problem to be solved urgently. Summary of the invention

[0005] In order to improve the operational convenience of separating a foam product from a mold, the present application provides a foam molding machine and a molding process.

[0006] In the first aspect, the present application provides a foam forming machine adopting the following technical solution: A foam molding machine comprises a mounting frame and a mold, wherein the mold comprises two molding mold bases slidably mounted on the mounting frame, and the mounting frame is provided with a driving assembly for driving the two molding mold bases to approach or move away from each other; side walls of the two molding mold bases that are close to each other are provided with mold grooves, and when the two molding mold bases are in contact with each other, the mold grooves of the two molding mold bases are combined to form a complete mold cavity; a first push rod is provided between each molding mold base and the mounting frame, one end of the first push rod is slidably connected to the mounting frame, and the other end penetrates into the molding mold base and is connected to a first push head; the first push rod is provided with a first driving ring, and the first driving ring is used for the molding mold base to push to drive the first push rod to slide, and when the two molding mold bases are in contact with each other, there is a gap between the molding mold base and the first driving ring, and the spacing between the molding mold base and the first driving ring is not less than the maximum depth of the mold groove.

[0007] By adopting the above technical solution, through the arrangement of the first push rod, the first push head and the first drive ring, after the foam product is formed in the mold cavity, the two molding mold seats are driven away from each other. When the molding mold seat is displaced, the first push rod remains stationary, so that the first push rod can push the foam product out of the mold groove of the molding mold seat through the first push head, so that the foam product is separated from the molding mold seat, and the convenience of separation between the foam product and the mold is improved. At the same time, the first push head is used to increase the contact area between the first push rod and the foam product, and reduce the possibility of damage to the surface of the foam product during the pushing process. When the foam product is separated from the mold groove, the two molding mold seats continue to be driven away from each other. At this time, the molding mold seat can push the first drive ring, thereby driving the first push rod to move, and the first push rods of the two molding mold seats are separated from each other, so that the first push head is separated from the foam product, and the convenience of taking out the foam product is improved.

[0008] Optionally, the mounting frame is provided with a mounting strip, the mounting strip is provided with a sliding groove for the first push rod to pass through, and the first push rod is slidably mounted on the mounting frame through the mounting strip; a limiting groove is provided on the peripheral wall of the first push rod, and the mounting strip is slidably mounted with the limiting strip, and a first spring is provided between the limiting strip and the mounting strip, and the first spring forces one end of the limiting strip to embed into the limiting groove of the first push rod; the mounting strip is provided with an unlocking component, and when the two molding mold bases move away from each other and the foam product is separated from the mold groove, the unlocking component forces the limiting strip to separate from the limiting groove.

[0009] By adopting the above technical solution, when the two molding die seats are attached to each other, the limiting strip is embedded in the limiting groove of the first push rod under the action of the first spring to limit the first push rod, so that when the two molding die seats are driven away from each other, the first push rod cannot slide to push the foam product out of the die groove. After the foam product is pushed out of the die groove, the two molding die seats continue to be driven away from each other. At this time, the unlocking component can force the limiting strip to disengage from the limiting groove, release the limiting effect on the first push rod, and the molding die seat can drive the first push rod to move through the first driving ring, so that the first push rods of the two molding die seats are moved away from each other to detach from the foam product, thereby improving the convenience of operation of the overall structure.

[0010] Optionally, the unlocking assembly includes a push bar, a second spring and an unlocking rod, the push bar is slidably installed on the mounting bar and is located on a side of the mounting bar close to the molding mold base, and the second spring is installed between the push bar and the mounting bar; one end of the unlocking rod is connected to the side wall of the push bar close to the mounting bar, and the limit bar is provided with a through groove for the unlocking rod to pass through, when the two molding mold bases move away from each other and the foam product detaches from the mold groove, the molding mold base forces the unlocking rod to pass through the through groove through the push bar, and the unlocking rod pushes the inner wall of the through groove to make the limit bar detach from the limit groove.

[0011] By adopting the above-mentioned technical solution, after the foam product is pushed out of the mold groove, the two molding mold bases continue to be driven away from each other, and the molding mold base can push the pushing bar, thereby driving the unlocking rod to pass through the penetration groove. During this process, the unlocking rod pushes the limit bar to slide through the inner wall of the penetration groove, forcing the limit bar to disengage from the limit groove, thereby improving the operational convenience of unlocking the first push rod.

[0012] Optionally, a ventilation flow channel is defined in the first push rod, and a blowing flow channel connected to the ventilation flow channel is defined on the outer peripheral wall of the first push head, wherein the blowing flow channel is gradually inclined toward a side away from the mounting strip from an end close to the ventilation flow channel to an end away from the ventilation flow channel; the first push rod is connected to an air supply assembly, and when the molding mold base drives the first push rod to displace, the air supply assembly blows air into the ventilation flow channel.

[0013] By adopting the above-mentioned technical solution, after the foam product is pushed out of the mold groove, the two molding mold bases continue to be driven away from each other, so that the molding mold base drives the first push rod to move through the first driving ring. During this process, the air supply component blows air into the ventilation channel, and the air flow blows toward the foam product through the blowing channel, thereby improving the separation effect between the foam product and the first push head.

[0014] Optionally, the air supply assembly includes an elastic airbag, a connecting tube and an extrusion plate, the elastic airbag is arranged on a mounting frame, the connecting tube is installed between the elastic airbag and the first push rod, one end of the connecting tube is connected to the interior of the elastic airbag, and the other end is connected to the ventilation channel; the extrusion plate is arranged on a side of the elastic airbag close to the pushing bar and is connected to the pushing bar, and when the molding mold base pushes the pushing bar, the extrusion plate squeezes the elastic airbag.

[0015] By adopting the above technical solution, after the foam product is pushed out of the mold groove, the two molding mold bases continue to be driven away from each other, and the molding mold base pushes the pushing strip, forcing the extrusion plate to squeeze the elastic airbag to push the gas in the elastic airbag to the ventilation flow channel, which is then used to blow off the foam product on the first pushing head.

[0016] Optionally, a connecting tube is installed on the side wall of the mounting strip away from the pushing strip, the first pushing rod is inserted into the connecting tube, a connecting tube inner wall is provided with a connecting cavity, and one end of the connecting tube away from the elastic airbag is connected with the connecting cavity; a vent hole connected to the ventilation flow channel is provided on the peripheral wall of the first pushing rod, and when the two molding mold seats are fitted against each other, an offset is formed between the vent hole and the ventilation cavity; when the molding mold seat pushes the first driving ring to move toward the mounting strip, the vent hole moves into the connecting tube and is connected with the connecting cavity.

[0017] By adopting the above technical solution, through the setting of the connecting tube and the vent hole, when the two molding die seats are attached to each other, the vent hole and the ventilation cavity are staggered, so that when the two molding die seats move away from each other and push the push strip, the elastic airbag is squeezed by the extrusion plate and shrinks, and the gas in the connecting cavity cannot flow out and the air pressure increases. With the continuous displacement of the molding die seat, when the molding die seat drives the first push rod to move and force the vent hole to connect with the connecting cavity, the gas can enter the ventilation flow channel, and the pressurized airflow can increase the driving force on the foam product, thereby ensuring that the foam product bonded to the first push head can be blown off, and the separation effect between the first push head and the foam product is improved.

[0018] Optionally, a guide groove is provided on the outer peripheral wall of the first push rod, and the guide groove is located on the side of the first drive ring away from the mounting strip, and the guide groove is spirally extended along the axial direction of the first push rod; the molding die base has a through hole for the first push rod to pass through, and a guide column is provided in the through hole, one end of the guide column is connected to the inner wall of the through hole, and the other end is inserted into the guide groove and displaced in the guide groove.

[0019] By adopting the above-mentioned technical scheme and setting the guide groove and the guide column, when the two molding mold seats move away from each other from the fitting state, the guide column of the molding mold seat slides in the guide groove, forcing the first push rod to rotate around its own central axis. The effect achieved is: when the molding mold seats move away from each other, the first push rod pushes the foam product out of the mold groove through the first push head, and at the same time, the first push rod rotates to separate the first push head from the foam product, thereby greatly improving the separation effect of the foam product and improving the operational convenience of the overall structure.

[0020] Optionally, a second pushing rod is provided between each of the forming mold bases and the mounting frame, one end of the second pushing rod is slidably connected to the mounting frame, and the other end penetrates into the forming mold base and is connected to a second pushing head; the second pushing rod is provided with a second driving ring, and the second driving ring is used for the forming mold base to push to drive the second pushing rod to slide, when the two forming mold bases are in contact with each other, there is a gap between the forming mold base and the second driving ring, and the distance between the forming mold base and the second driving ring is greater than the distance between the forming mold base and the first driving ring; the second pushing rod is provided with a speed increasing component, when the forming mold base pushes the first driving ring and the second driving ring at the same time, the speed increasing component forces the second pushing head to move faster than the first pushing head.

[0021] By adopting the above technical solution, on the one hand, the second push head increases the contact area with the foam product, reducing the possibility of damage to the foam product during the pushing process. On the other hand, the spacing between the molding die seat and the second drive ring is greater than the spacing between the molding die seat and the first drive ring. When the two molding die seats move away from each other to force the foam product to leave the die groove, the molding die seat continues to be driven to move. Since the second push head remains stationary at this time, the molding die seat first pushes the first drive ring, driving the first push head to first leave the foam product. With the continuous displacement of the molding die seat, the molding die seat can push the first drive ring and the second drive ring at the same time. Under the action of the speed increasing component, the movement speed of the second push head is greater than the movement speed of the first push head, so that the second push head can move relative to the first push head toward the side close to the mounting strip, and cooperate with the blocking of the first push head to separate the second push head from the foam product, so that the foam product is separated from the first push head and the second push head in turn, improving the convenience of the foam product separation operation.

[0022] Optionally, the second pushing rod is provided with a penetration slide, the second pushing head is connected with a penetration slide rod, one end of the penetration slide rod is connected to the second pushing head, and the other end is slidably penetrated through the penetration slide, and the second pushing head is slidably installed on the second pushing rod through the penetration slide rod; the speed increasing assembly includes a rotating gear, a first rack and a second rack, the rotating gear is rotatably installed on the second pushing rod, the first rack is arranged on the penetration slide rod, and the second rack is arranged on the mounting frame, the first rack and the rotating gear, and the second rack and the rotating gear are meshed and transmitted, and when the forming mold base pushes the second driving ring to displace, the penetration slide rod is displaced relative to the second pushing rod toward the side away from the forming mold base.

[0023] By adopting the above-mentioned technical solution, when the molding die base pushes the first driving ring and the second driving ring at the same time, the first pushing rod and the second pushing rod are driven to move synchronously. At this time, under the action of the rotating gear, the first rack and the second rack, the penetrating sliding rod moves toward the side away from the molding die base relative to the second pushing rod to increase the speed, thereby enabling the foam product to be separated from the first pushing head and the second pushing head in turn, thereby improving the operational convenience of separating the foam products.

[0024] In the second aspect, the present application provides a foam forming process using the following technical solutions: A foam molding process specifically comprises the following steps: S1, preparation of foam particles; S2, filling and heating: feeding the foam particles into a mold cavity of a mold and expanding them by heating; S3, cooling and demoulding: cooling the mold to completely solidify the molded foam product to maintain a stable shape, and taking out the foam product after cooling and shaping; S4, post-processing: quality inspection and packaging of the foam product to ensure that the foam product meets quality requirements.

[0025] In summary, the present application includes at least one of the following beneficial technical effects: 1. Through the arrangement of the first push rod, the first push head and the first drive ring, after the foam product is formed in the mold cavity, the two molding mold seats are driven away from each other. When the molding mold seat is displaced, the first push rod remains stationary, so that the first push rod can push the foam product out of the mold groove of the molding mold seat through the first push head, so that the foam product is separated from the molding mold seat, thereby improving the operational convenience of separating the foam product from the mold. At the same time, the first push head is used to increase the contact area between the first push rod and the foam product, and reduce the possibility of damaging the surface of the foam product during the pushing process. When the foam product is separated from the mold groove, the two molding mold seats continue to be driven away from each other. At this time, the molding mold seat can push the first drive ring, thereby driving the first push rod to move, and the first push rods of the two molding mold seats are separated from each other, so that the first push head is separated from the foam product, thereby improving the operational convenience of taking out the foam product; 2. Through the arrangement of the guide groove and the guide column, when the two molding die seats move away from each other from the fitted state, the guide column of the molding die seat slides in the guide groove, forcing the first push rod to rotate around its own central axis, so that when the molding die seats move away from each other, the first push rod pushes the foam product out of the die groove through the first push head, and at the same time, the first push rod rotates to separate the first push head from the foam product, which greatly improves the separation effect of the foam product and improves the convenience of operation of the overall structure; 3. Through the arrangement of the second pushing rod and the speed increasing component, the spacing between the forming die seat and the second driving ring is greater than the spacing between the forming die seat and the first driving ring. When the two forming die seats move away from each other to force the foam product to separate from the die groove, the forming die seat continues to be driven to move. Since the second pushing head remains stationary at this time, the forming die seat first pushes the first driving ring, driving the first pushing head to separate from the foam product first. With the continuous displacement of the forming die seat, the forming die seat can push the first driving ring and the second driving ring at the same time. Under the action of the speed increasing component, the movement speed of the second pushing head is greater than the movement speed of the first pushing head, so that the second pushing head can be displaced relative to the first pushing head toward the side close to the mounting strip, and cooperate with the blocking of the first pushing head to separate the second pushing head from the foam product, so that the foam product is separated from the first pushing head and the second pushing head in turn, thereby improving the convenience of foam product separation. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 is a schematic diagram of the overall structure of Example 1; Figure 2 is a partial cross-sectional view of the molding die base embodied in Embodiment 1; Figure 3 is a partial cross-sectional view of the embodiment 1 showing the molding die base abutting against the first driving ring; Figure 4 yes Figure 3 The enlarged view of point A in the middle; Figure 5 is a partial cross-sectional view of the air supply assembly of embodiment 2; Figure 6 yes Figure 5 The enlarged view of point B in the middle; Figure 7 yes Figure 5 Enlarged view of point C in the middle; Figure 8 is a partial cross-sectional view of the guide groove of Embodiment 3; Fig. 9 is a partial cross-sectional view of a speed increasing assembly according to Embodiment 4; Fig.10 yes Fig. 9 Enlarged view of point D in the middle.

[0027] Explanation of reference numerals: 1. mounting frame; 11. mounting bar; 12. sliding groove; 13. limiting bar; 131. penetration groove; 14. first spring; 15. connecting tube; 151. connecting cavity; 16. slide rail; 17. driving cylinder; 18. injection pipe; 2. forming die base; 21. die groove; 22. penetration hole; 23. guide column; 3. first push rod; 31. first push head; 311. blowing air channel; 32. first driving ring; 33. limiting groove; 34. ventilation air channel; 341. ventilation hole; 35. guide groove ; 36. Avoidance groove; 4. Unlocking assembly; 41. Push bar; 411. Sliding rod; 42. Second spring; 43. Unlocking rod; 431. Straight section; 432. Inclined section; 5. Air supply assembly; 51. Elastic airbag; 52. Connecting pipe; 53. Extrusion plate; 531. Connecting rod; 6. Second push rod; 61. Second push head; 611. Through-sliding rod; 62. Second driving ring; 63. Through-slideway; 7. Speed ​​increasing assembly; 71. Rotating gear; 72. First rack; 73. Second rack; 8. Foam product. DETAILED DESCRIPTION

[0028] The following is combined with Figure 1 -Attached Fig.10 This application is described in further detail.

[0029] Embodiment 1: The embodiment of the present application discloses a foam forming machine.

[0030] Reference Figure 1 , Figure 2 A foam molding machine includes a mounting frame 1 and a mold, wherein a slide rail 16 is fixedly mounted on the inner wall of the mounting frame 1, and the mold includes two molding die holders 2, both of which are slidably mounted on the slide rail 16 of the mounting frame 1, and the mounting frame 1 is provided with a driving assembly, and the driving assembly is used to drive the two molding die holders 2 to move closer to or away from each other. In this embodiment, the driving assembly includes two driving cylinders 17, and the two driving cylinders 17 are arranged corresponding to the two molding die holders 2, and the cylinder bodies of the driving cylinders 17 are fixedly mounted on the side walls of the mounting frame 1, and the piston rods of the driving cylinders 17 extend into the mounting frame 1 and are fixedly connected to the side walls of the corresponding molding die holders 2.

[0031] Reference Figure 2 , Figure 3 The side walls of the two molding mold bases 2 that are close to each other are each provided with a mold groove 21. When the two molding mold bases 2 are fitted together, the mold grooves 21 of the two molding mold bases 2 are combined to form a complete mold cavity. The mounting frame 1 is installed with an injection pipe 18. The outlet end of the injection pipe 18 is connected to the mold groove 21 of one of the molding mold bases 2 for injecting foam particles into the mold cavity.

[0032] Reference Figure 2 , Figure 3, Figure 4 , the side walls of the two molding die bases 2 that are away from each other are provided with through holes 22, and each molding die base 2 is provided with two through holes 22, and the two through holes 22 are connected to the die groove 21 of the molding die base 2. Two mounting bars 11 are fixedly installed on the inner wall of the mounting frame 1, and the two mounting bars 11 are correspondingly arranged with the two molding die bases 2, and the two molding die bases 2 are located between the two mounting bars 11. The side wall of each mounting bar 11 is provided with two sliding grooves 12, and the two sliding grooves 12 of the mounting bar 11 are correspondingly arranged with the two through holes 22 of the corresponding molding die base 2.

[0033] Each molding die base 2 is equipped with a first push rod 3. In the present embodiment, the number of the first push rods 3 of each molding die base 2 is set to two, and the two first push rods 3 are arranged corresponding to the two sliding grooves 12 of the mounting strip 11. One end of the first push rod 3 is slidably penetrated in the sliding groove 12 of the mounting strip 11, and the first push rod 3 is slidably installed on the mounting frame 1 through the mounting strip 11. The other end of the first push rod 3 is penetrated through the penetration hole 22 of the molding die base 2 and is connected to the first push head 31. The outer diameter of the first push head 31 is larger than the outer diameter of the first push rod 3.

[0034] Reference Figure 3 , Figure 4 The outer peripheral wall of the first push rod 3 is fixedly mounted with a first driving ring 32, which is located between the forming die base 2 and the corresponding mounting strip 11. The first driving ring 32 is used for the forming die base 2 to push the first push rod 3 to slide. When the two forming die bases 2 are attached to each other, there is a gap between the forming die base 2 and the first driving ring 32, and the distance between the forming die base 2 and the first driving ring 32 is not less than the maximum depth of the die groove 21.

[0035] The outer peripheral wall of the first push rod 3 is provided with a limiting groove 33, which is arranged in an annular shape around the central axis of the first push rod 3. The limiting groove 33 is located on the side of the first driving ring 32 away from the first push head 31. When the two molding die seats 2 are attached to each other, the limiting groove 33 is located in the sliding groove 12 of the mounting bar 11. The limiting strip 13 is slidably installed in the mounting bar 11, and a first spring 14 is installed between the limiting strip 13 and the mounting bar 11. One end of the first spring 14 is fixedly connected to the side wall of the limiting strip 13, and the other end is fixedly connected to the inner wall of the mounting bar 11. The first spring 14 forces one end of the limiting strip 13 to be embedded in the limiting groove 33 of the first push rod 3. It should be noted that there are two limiting strips 13 in this embodiment, and the two limiting strips 13 are arranged corresponding to the two first push rods 3 to limit the free sliding of the corresponding first push rods 3.

[0036] Reference Figure 3 , Figure 4The mounting strip 11 is provided with an unlocking assembly 4. When the two molding die seats 2 move away from each other and the foam product 8 is separated from the die groove 21, the unlocking assembly 4 forces the limiting strip 13 to be separated from the limiting groove 33. In this embodiment, the unlocking assembly 4 includes a push strip 41, a second spring 42, and an unlocking rod 43. The push strip 41 is located on a side of the mounting strip 11 close to the molding die seat 2. A sliding rod 411 is fixedly installed on the side wall of the push strip 41. The sliding rod 411 slides through the mounting strip 11. The push strip 41 is slidably installed on the mounting strip 11 through the sliding rod 411.

[0037] One end of the second spring 42 is fixedly connected to the mounting bar 11, and the other end is fixedly connected to the push bar 41. The number of unlocking rods 43 is set corresponding to the number of limiting bars 13. The unlocking rods 43 are installed on the side wall of the push bar 41 close to the mounting bar 11, and the side wall of the limiting bar 13 is provided with a penetration groove 131 for the corresponding unlocking rod 43 to pass through. The unlocking rod 43 includes a straight section 431 and an inclined section 432. One end of the straight section 431 away from the inclined section 432 is fixedly installed on the side wall of the push bar 41 close to the mounting bar 11, and the inclined section 432 is inclined.

[0038] When the two molding die seats 2 are attached to each other, the second spring 42 forces the inclined section 432 of the unlocking rod 43 to move out of the penetration groove 131 of the limiting strip 13, and at this time, the distance between the push strip 41 and the molding die seat 2 is smaller than the distance between the first drive ring 32 and the molding die seat 2. When the two molding die seats 2 move away from each other and the foam product 8 is separated from the die groove 21, the molding die seat 2 forces the unlocking rod 43 to pass through the penetration groove 131 through the push strip 41, and the inclined section 432 of the unlocking rod 43 pushes the inner wall of the penetration groove 131, so that the limiting strip 13 is separated from the limiting groove 33.

[0039] The implementation principle of the embodiment 1 of the present application is as follows: when the two molding die seats 2 are attached to each other, the push bar 41 moves toward the side away from the mounting bar 11 under the action of the second spring 42, so that the unlocking rod 43 is separated from the limiting bar 13. The limiting bar 13 is embedded in the limiting groove 33 of the first push rod 3 under the action of the first spring 14 to limit the free sliding of the first push rod 3. After the foam product 8 is molded in the mold cavity, the two molding die seats 2 are driven away from each other. When the molding die seat 2 is displaced, the first push rod 3 remains stationary, so that the first push rod 3 can push the foam product 8 out of the mold groove 21 of the molding die seat 2 through the first push head 31, so that the foam product 8 is separated from the molding die seat 2, and the convenience of separation between the foam product 8 and the mold is improved.

[0040] After the foam product 8 is separated from the die groove 21, the two molding die seats 2 are continuously driven away from each other. At this time, the molding die seat 2 pushes the push bar 41, and forces the limit bar 13 to separate from the limit groove 33 of the first push rod 3 through the unlocking rod 43, so as to release the limit of the first push rod 3. Then, the two molding die seats 2 are driven away from each other, and the molding die seat 2 can drive the first push rod 3 to slide through the first driving ring 32, and the first push rods 3 of the two molding die seats 2 are separated from each other, so that the first push head 31 is separated from the foam product 8, and the convenience of taking out the foam product 8 is improved.

[0041] Embodiment 2: The embodiment of the present application discloses a foam forming machine.

[0042] The difference between the foam forming machine disclosed in the embodiment of the present application and the embodiment 1 is that: Reference Figure 5 , Figure 6 , Figure 7 In this embodiment, a ventilation flow channel 34 is opened in the first pushing rod 3, one end of the ventilation flow channel 34 extends into the first pushing head 31, and a plurality of blowing flow channels 311 are opened on the outer peripheral wall of the first pushing head 31. The plurality of blowing flow channels 311 are arranged at intervals around the central axis of the first pushing rod 3, and each blowing flow channel 311 is connected to the ventilation flow channel 34, and the blowing flow channel 311 is gradually inclined toward the side away from the mounting strip 11 from one end close to the ventilation flow channel 34 to the end away from the ventilation flow channel 34.

[0043] Reference Figure 5 , Figure 6 The first push rod 3 is connected to an air supply assembly 5. When the molding die base 2 drives the first push rod 3 to move, the air supply assembly 5 blows air into the ventilation channel 34. The air supply assembly 5 includes an elastic air bag 51, a connecting pipe 52 and an extrusion plate 53. The elastic air bag 51 is installed on the inner wall of the mounting frame 1 and is located on the side of the mounting strip 11 away from the molding die base 2. The elastic air bag 51 is made of plastic and has elasticity (the structure of the elastic air bag 51 is the same as the pressing cylinder structure of a manual water pump. The specific structure of the elastic air bag 51 will not be elaborated here. The specific structure can be referred to the manual water pump).

[0044] A connecting tube 15 is installed on the side wall of the mounting bar 11 away from the pushing bar 41, and the first push rod 3 is inserted through the connecting tube 15. A connecting cavity 151 is provided on the inner wall of the connecting tube 15. One end of the connecting tube 52 is connected to the elastic airbag 51 and communicates with the inside of the elastic airbag 51, and the other end is connected to the connecting tube 15 and communicates with the communicating cavity 151. A vent hole 341 communicating with the ventilation channel 34 is provided on the peripheral wall of the first push rod 3. When the two molding die seats 2 are attached to each other, the vent hole 341 is displaced into the sliding groove 12 (i.e., the vent hole 341 and the vent cavity are displaced). When the molding die seat 2 pushes the first driving ring 32 to move closer to the mounting bar 11, the vent hole 341 moves into the connecting tube 15 and communicates with the communicating cavity 151.

[0045] Reference Figure 5 , Figure 6 The extrusion plate 53 is located on the side of the elastic airbag 51 close to the push bar 41. A connecting rod 531 is installed between the extrusion plate 53 and the push bar 41. One end of the connecting rod 531 is fixedly connected to the extrusion plate 53, and the other end passes through the mounting bar 11 and is fixedly connected to the push bar 41. The extrusion plate 53 and the push bar 41 are connected by the connecting rod 531. When the molding die base 2 pushes the push bar 41, the extrusion plate 53 squeezes the elastic airbag 51; in order to improve the deformation recovery ability of the elastic airbag 51, a spring can also be added inside the elastic airbag 51 to ensure that when the two molding die bases 2 are attached to each other, the elastic airbag 51 can recover its deformation.

[0046] The implementation principle of Example 2 of the present application is as follows: after the foam product 8 is pushed out of the die groove 21, the two molding die bases 2 continue to be driven away from each other, and the molding die base 2 first contacts the push bar 41, thereby squeezing the elastic airbag 51 through the squeezing plate 53, causing the elastic airbag 51 to shrink and increase the air pressure in the connecting cavity 151. As the molding die base 2 continues to move, the molding die base 2 drives the first push rod 3 to move through the first drive ring 32, driving the vent 341 of the first push rod 3 to move into the connecting tube 15 and connect with the connecting cavity 151. The airflow with a certain pressure in the connecting cavity 151 can be blown toward the foam product 8 through the blowing air channel 311, so that the foam product 8 is separated from the first push head 31, improving the separation effect between the foam product 8 and the first push head 31, and improving the convenience of operation of the overall structure.

[0047] Embodiment 3: The embodiment of the present application discloses a foam forming machine.

[0048] The difference between the foam forming machine disclosed in the embodiment of the present application and the embodiment 1 is that: Reference Figure 8In this embodiment, a guide groove 35 is provided on the outer peripheral wall of the first push rod 3, and the guide groove 35 is located on the side of the first drive ring 32 away from the mounting strip 11, and when the two molding mold bases 2 are in contact with each other, the guide groove 35 is located in the through hole 22 of the molding mold base 2, and the guide groove 35 is spirally extended along the axial direction of the first push rod 3.

[0049] A guide post 23 is installed on the inner wall of the through hole 22 . One end of the guide post 23 is fixedly connected to the inner wall of the through hole 22 , and the other end of the guide post 23 is inserted into the guide groove 35 and displaced in the guide groove 35 .

[0050] An avoidance groove 36 is provided on the outer peripheral wall of the first push rod 3, and both ends of the avoidance groove 36 are extended along the length direction of the first push rod 3. One end of the avoidance groove 36 is connected to the guide groove 35, and the other end extends to the first drive ring 32. The setting of the avoidance groove 36 enables the molding die base 2 to contact the first drive ring 32.

[0051] The implementation principle of Example 3 of the present application is: through the setting of the guide groove 35 and the guide column 23, when the two molding mold bases 2 move away from each other from the fitting state, the guide column 23 of the molding mold base 2 slides in the guide groove 35, forcing the first push rod 3 to rotate around its own central axis. The effect achieved is: when the molding mold bases 2 move away from each other, the first push rod 3 pushes the foam product 8 out of the mold groove 21 through the first push head 31, and at the same time, the first push rod 3 rotates around its own central axis to separate the first push head 31 from the foam product 8, which greatly improves the separation effect of the foam product 8 and improves the operational convenience of the overall structure.

[0052] Embodiment 4: The embodiment of the present application discloses a foam forming machine.

[0053] The difference between the foam forming machine disclosed in the embodiment of the present application and the embodiment 1 is that: Reference Fig. 9 , Fig.10In this embodiment, the number of the first push rod 3 is set to one, and a second push rod 6 is arranged between each molding die base 2 and the mounting frame 1. One end of the second push rod 6 is slidably penetrated in the sliding groove 12 of the mounting bar 11, and the second push rod 6 is slidably mounted on the mounting frame 1 through the mounting bar 11. The other end of the second push rod 6 penetrates the penetration hole 22 of the molding die base 2 and is connected with a second push head 61. The outer diameter of the second push head 61 is larger than the outer diameter of the second push rod 6. A second driving ring 62 is fixedly mounted on the outer peripheral wall of the second push rod 6. The second driving ring 62 is located between the molding die base 2 and the corresponding mounting bar 11. The second driving ring 62 is used for the molding die base 2 to push to drive the second push rod 6 to slide. When the two molding die bases 2 are attached to each other, there is a gap between the molding die base 2 and the second driving ring 62, and the distance between the molding die base 2 and the second driving ring 62 is larger than the distance between the molding die base 2 and the first driving ring 32.

[0054] Reference Fig. 9 , Fig.10 The second push rod 6 is provided with a penetration slideway 63 at the end surface close to the second push head 61, and the second push head 61 is fixedly connected with a penetration slide bar 611, one end of the penetration slide bar 611 is fixedly connected to the second push head 61, and the other end is slidably penetrated in the penetration slideway 63, and the second push head 61 is slidably installed on the second push rod 6 through the penetration slide bar 611. The second push rod 6 is provided with a speed increasing component 7, and when the molding die base 2 pushes the first driving ring 32 and the second driving ring 62 at the same time, the speed increasing component 7 forces the second push head 61 to move faster than the first push head 31.

[0055] The speed increasing assembly 7 includes a rotating gear 71, a first rack 72 and a second rack 73. The rotating gear 71 is rotatably mounted on the outer wall of the second push rod 6. One end of the first rack 72 is fixedly connected to the end face of the through-sliding rod 611 away from the second push head 61. The length direction of the first rack 72 is consistent with the length direction of the through-sliding rod 611. The second rack 73 is fixedly mounted on the inner wall of the mounting frame 1. The length direction of the second rack 73 is consistent with the length direction of the first rack 72. The first rack 72 and the rotating gear 71, as well as the second rack 73 and the rotating gear 71 are all meshed and transmitted. When the forming die base 2 pushes the second driving ring 62 to move, the through-sliding rod 611 moves relative to the second push rod 6 toward the side away from the forming die base 2.

[0056] It should be noted that, in this embodiment, the limiting mode of the second push rod 6 is the same as that of the first push rod 3, that is, the outer peripheral wall of the second push rod 6 also needs to be provided with a limiting groove 33 for the limiting strip 13 in the mounting strip 11 to be embedded. The unlocking mode of the second push rod 6 is also set to be the same as that of the first push rod 3, and the length of the straight section 431 of the unlocking rod 43 corresponding to the second push rod 6 is less than the length of the straight section 431 of the unlocking rod 43 corresponding to the first push rod 3. When the molding die base 2 abuts against the second driving ring 62, the unlocking rod 43 corresponding to the second push rod 6 unlocks the limiting strip 13; such a design enables the second push rod 6 to be in a limiting state when the molding die base 2 first pushes the first driving ring 32, and the second push rod 6 to be in an unlocking state (i.e., able to slide freely) when the molding die base 2 pushes the second driving ring 62.

[0057] The implementation principle of Example 4 of the present application is: the distance between the molding mold base 2 and the second driving ring 62 is greater than the distance between the molding mold base 2 and the first driving ring 32. When the two molding mold bases 2 move away from each other to force the foam product 8 to separate from the mold groove 21, the molding mold base 2 continues to be driven to move. Since the second pushing head 61 remains stationary at this time, the molding mold base 2 first pushes the first driving ring 32, driving the first pushing head 31 to separate from the foam product 8 first.

[0058] With the continuous displacement of the molding die base 2, the molding die base 2 can push the first drive ring 32 and the second drive ring 62 at the same time. Under the action of the speed increasing component 7, the movement speed of the second pushing head 61 is greater than the movement speed of the first pushing head 31, so that the second pushing head 61 can be displaced toward the side close to the mounting strip 11 relative to the first pushing head 31, and cooperate with the blocking of the first pushing head 31 to separate the second pushing head 61 from the foam product 8, so that the foam product 8 is separated from the first pushing head 31 and the second pushing head 61 in turn, thereby improving the operational convenience of separating the foam product 8.

[0059] Embodiment 5: The embodiment of the present application also discloses a foam forming process.

[0060] A foam forming process specifically comprises the following steps: S1. Preparation of foam particles.

[0061] S2, filling and heating: the foam particles are fed into the mold cavity, and expanded by heating to fill the entire mold cavity. The heating method can be carried out by introducing steam into the molding mold base 2.

[0062] S3, cooling and demoulding: Cool the mold to completely solidify the molded foam product 8 to maintain a stable shape. The cooling method can be natural cooling or by passing cooling water into the molding mold base 2. After cooling and shaping, drive the two molding mold bases 2 away from each other to take out the foam product 8.

[0063] S4, post-processing: quality inspection and packaging of the foam product 8 to ensure that the foam product 8 meets the quality requirements.

[0064] The above are preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A foam forming machine, characterized in that: The invention comprises a mounting frame (1) and a mold, wherein the mold comprises two molding mold bases (2) slidably mounted on the mounting frame (1), and the mounting frame (1) is provided with a driving assembly for driving the two molding mold bases (2) to move toward or away from each other; the side walls of the two molding mold bases (2) that are close to each other are each provided with a mold groove (21), and when the two molding mold bases (2) are fitted together, the mold grooves (21) of the two molding mold bases (2) are combined to form a complete mold cavity; a first push rod (3) is provided between each molding mold base (2) and the mounting frame (1), and the first push rod (3) is provided between the molding mold base (2) and the mounting frame (1), and the first push rod (3) is provided between the molding mold base (2) and the mounting frame (1). One end of a push rod (3) is slidably connected to the mounting frame (1), and the other end penetrates into the forming die base (2) and is connected to a first push head (31); the first push rod (3) is provided with a first drive ring (32), and the first drive ring (32) is used for the forming die base (2) to push the first push rod (3) to slide, and when the two forming die bases (2) are in contact with each other, there is a gap between the forming die base (2) and the first drive ring (32), and the distance between the forming die base (2) and the first drive ring (32) is not less than the maximum depth of the die groove (21).

2. A foam forming machine according to claim 1, characterized in that: The mounting frame (1) is provided with a mounting strip (11), the mounting strip (11) is provided with a sliding groove (12) for the first push rod (3) to pass through, and the first push rod (3) is slidably mounted on the mounting frame (1) through the mounting strip (11); a limiting groove (33) is provided on the peripheral wall of the first push rod (3), and the mounting strip (11) is slidably mounted on the limiting strip (13), and a first spring (14) is provided between the limiting strip (13) and the mounting strip (11), and the first spring (14) forces one end of the limiting strip (13) to be embedded in the limiting groove (33) of the first push rod (3); the mounting strip (11) is provided with an unlocking component (4), and when the two molding mold bases (2) are away from each other and the foam product (8) is separated from the mold groove (21), the unlocking component (4) forces the limiting strip (13) to be separated from the limiting groove (33).

3. A foam forming machine according to claim 2, characterized in that: The unlocking assembly (4) comprises a push bar (41), a second spring (42) and an unlocking rod (43); the push bar (41) is slidably mounted on the mounting bar (11) and is located on a side of the mounting bar (11) close to the molding die seat (2); the second spring (42) is mounted between the push bar (41) and the mounting bar (11); one end of the unlocking rod (43) is connected to a side wall of the push bar (41) close to the mounting bar (11); the limit bar (13) is provided with a through groove (131) for the unlocking rod (43) to pass through; when the two molding die seats (2) move away from each other and the foam product (8) is separated from the mold groove (21), the molding die seat (2) forces the unlocking rod (43) to pass through the through groove (131) through the push bar (41), and the unlocking rod (43) pushes the inner wall of the through groove (131) to make the limit bar (13) separate from the limit groove (33).

4. A foam forming machine according to claim 3, characterized in that: A ventilation channel (34) is provided in the first push rod (3), and a blowing channel (311) connected to the ventilation channel (34) is provided on the outer peripheral wall of the first push head (31), and the blowing channel (311) is gradually inclined from an end close to the ventilation channel (34) to an end away from the ventilation channel (34) and toward a side away from the mounting strip (11); the first push rod (3) is connected to an air supply component (5), and when the molding die base (2) drives the first push rod (3) to move, the air supply component (5) blows air into the ventilation channel (34).

5. A foam forming machine according to claim 4, characterized in that: The air supply assembly (5) comprises an elastic airbag (51), a connecting pipe (52) and an extrusion plate (53); the elastic airbag (51) is arranged on the mounting frame (1); the connecting pipe (52) is installed between the elastic airbag (51) and the first push rod (3); one end of the connecting pipe (52) is connected to the inside of the elastic airbag (51), and the other end is connected to the air passage (34); the extrusion plate (53) is arranged on a side of the elastic airbag (51) close to the pushing strip (41) and is connected to the pushing strip (41); when the molding die base (2) pushes the pushing strip (41), the extrusion plate (53) extrudes the elastic airbag (51).

6. A foam forming machine according to claim 5, characterized in that: A connecting tube (15) is installed on the side wall of the installation strip (11) away from the pushing strip (41), the first pushing rod (3) is inserted into the connecting tube (15), a connecting cavity (151) is provided on the inner wall of the connecting tube (15), and one end of the connecting tube (52) away from the elastic airbag (51) is connected to the connecting cavity (151); a vent hole (341) connected to the ventilation channel (34) is provided on the peripheral wall of the first pushing rod (3), and when the two molding die seats (2) are fitted together, the vent hole (341) and the vent cavity are misaligned; when the molding die seat (2) pushes the first driving ring (32) to move toward the installation strip (11), the vent hole (341) moves into the connecting tube (15) and is connected to the connecting cavity (151).

7. A foam forming machine according to claim 2, characterized in that: A guide groove (35) is provided on the outer peripheral wall of the first push rod (3), and the guide groove (35) is located on the side of the first drive ring (32) away from the mounting strip (11), and the guide groove (35) is spirally extended along the axial direction of the first push rod (3); the molding die base (2) has a through hole (22) for the first push rod (3) to pass through, and a guide column (23) is provided in the through hole (22), and one end of the guide column (23) is connected to the inner wall of the through hole (22), and the other end is inserted into the guide groove (35) and displaced in the guide groove (35).

8. A foam forming machine according to claim 1, characterized in that: A second push rod (6) is provided between each of the molding die bases (2) and the mounting frame (1); one end of the second push rod (6) is slidably connected to the mounting frame (1), and the other end penetrates into the molding die base (2) and is connected to a second push head (61); the second push rod (6) is provided with a second drive ring (62), and the second drive ring (62) is used for pushing the molding die base (2) to drive the second push rod (6) to slide. When the two molding die bases (2) are in contact with each other, the molding die bases (2) are There is a gap between the mold base (2) and the second drive ring (62), and the distance between the mold base (2) and the second drive ring (62) is greater than the distance between the mold base (2) and the first drive ring (32); the second push rod (6) is provided with a speed increasing component (7), and when the mold base (2) pushes the first drive ring (32) and the second drive ring (62) at the same time, the speed increasing component (7) forces the second push head (61) to move faster than the first push head (31).

9. A foam forming machine according to claim 8, characterized in that: The second push rod (6) is provided with a penetration slideway (63), the second push head (61) is connected with a penetration slide bar (611), one end of the penetration slide bar (611) is connected to the second push head (61), and the other end is slidably penetrated in the penetration slideway (63), and the second push head (61) is slidably installed on the second push rod (6) through the penetration slide bar (611); the speed increasing assembly (7) comprises a rotating gear (71), a first rack (72) and a second rack (73), the rotating gear (71) is rotatably mounted on the second push rod (6), the first rack (72) is arranged on the penetrating slide rod (611), the second rack (73) is arranged on the mounting frame (1), the first rack (72) and the rotating gear (71), as well as the second rack (73) and the rotating gear (71) are meshed and transmitted, when the molding die base (2) pushes the second driving ring (62) to move, the penetrating slide rod (611) moves relative to the second push rod (6) toward a side away from the molding die base (2).

10. A foam forming process, based on a foam forming machine according to any one of claims 1 to 9, comprising the following steps: S1. Preparation of foam particles; S2, filling and heating: feeding the foam particles into the mold cavity and expanding them by heating; S3, cooling and demoulding: cooling the mold to completely solidify the molded foam product (8) to maintain a stable shape, and after cooling and shaping, taking out the foam product (8); S4, post-processing: quality inspection and packaging of the foam product (8) to ensure that the foam product (8) meets the quality requirements.

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