A production line and production method for EPP molded products stored in multiple tanks

Abstract

The present invention relates to the technical field of EPP molding equipment, and specifically, to a production line of EPP molding products stored in multiple tanks. The production line includes a supporting frame and a mutually cooperating die and a punch arranged inside the supporting frame, wherein the die is fixedly connected to the supporting frame, the punch is slidably connected to the supporting frame, and a storage tank for feeding the die is arranged on the side close to the die, and a storage box slidably connected to the supporting frame is arranged between the die and the punch, and the storage box is used to store the insulation box that is released from the die. The gas at the expansion end of the first airbag is gradually transported into the second airbag until the auxiliary plates on both sides clamp and fix the insulation box, and the expansion of the second airbag is used to abut against the bottom of the storage box, so that the clamped insulation box can be lifted upward to leave a gap for the valve plate to reset in reverse, thereby temporarily storing the demoulded insulation box in the storage box, and releasing the stored insulation box when the valve plate is opened again, thereby improving the processing efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of EPP molding equipment, and in particular to a production line and a production method for EPP molded products stored in multiple tanks. Background Art

[0002] The EPP molding process includes pre-foaming, molding and drying. First, the EPP beads are placed in the pre-foaming tank for pre-foaming, and then taken out and transported to the molding mechanism. Molding is to mold the foamed EPP beads into various shapes of EPP products in the molding machine. The molding machine includes a die and a punch. The die is fixed on the frame, and there is a groove on the die. The punch has a convex body. The punch is driven by the die pressing mechanism to move relative to the die. When the punch and the die are combined, the beads are sprayed into the groove of the die through a spray gun. Under the pressing and heating of the punch, the EPP product is formed.

[0003] Furthermore, considering that the processed products (such as EPP insulation boxes) have different types and colors, raw materials of various colors are usually stored separately in storage tanks and injected into corresponding grooves during the molding process to form insulation boxes of different colors.

[0004] For brightly colored (such as white) incubators, in order to prevent the incubators from directly contacting the ground or conveyor belt when they are released from the die, which would affect the cleanliness of the surface of the incubator, an outward-slanting protective net is often installed in the unloading area of ​​the incubator, so that when the incubator falls, it slides along the protective net to the sorting area outside the equipment for manual sorting. However, since multiple incubators can be produced in one molding process, the incubators are in a messy state during the sliding process, which will increase the time for manual sorting. If sorting is not done in time, it is easy to cause the foam boxes on the protective net to accumulate, which in turn affects the progress of the processing. Summary of the invention

[0005] The object of the present invention is to provide a production line and a production method for EPP molded products stored in multiple tanks to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above-mentioned purpose, the object of the present invention is to provide a production line of EPP molded products with multi-tank storage, including a support frame and a die and a punch that cooperate with each other and are arranged inside the support frame, the die is fixedly connected to the support frame, the punch is slidably connected to the support frame, and a storage tank for feeding the die is arranged on the side close to the die, a storage box slidably connected to the support frame is arranged between the die and the punch, the storage box is used to store the insulation box that escapes from the die, a wire take-up machine for controlling the lifting and lowering of the storage box is arranged on the top of the support frame, a valve mechanism elastically connected to the support frame is arranged at the bottom of the storage box, a first airbag is bonded to the bottom of the valve mechanism, the first airbag is connected to an expansion mechanism symmetrically arranged on the side wall of the storage box, when accumulation occurs in the unloading area, the valve mechanism drives the first airbag to move so that the first airbag expands to resist the insulation box in the accumulation area, and the expansion mechanism on both sides is used to expand to clamp the insulation box to limit the downward movement of the insulation box.

[0007] As a further improvement of the present technical solution, slides are fixedly connected on both sides of the side walls of the storage box, and the slides are slidably connected to slide rails fixed on the support frame, wherein the bottom slide rails are used to support the slides, and when the bottom slide rails are not in contact with the slides, the top slide rails are still in a state of sliding connection with the slides to maintain the stability of the storage box.

[0008] As a further improvement of the present technical solution, the valve mechanism includes a valve plate located at the bottom of the material storage box and slidably connected to the material storage box, the valve plate is used to support the demolding insulation box, both ends of the valve plate are embedded in the material storage box, both sides of one end of the valve plate are elastically connected to the support frame with elastic ropes, and the bottom of the other end is elastically connected to the material storage box with a return spring.

[0009] As a further improvement of the present technical solution, a through groove is provided on the storage box corresponding to the valve plate, the top of the through groove is in contact with the valve plate, and the bottom is in contact with the first airbag. Under normal circumstances, the first airbag is inflated. When the valve plate is opened, the lower edge of the through groove is used to squeeze the first airbag, so that the first airbag expands and squeezes the insulation box in the stacking area below, so as to control the distance between the insulation box and the valve plate.

[0010] As a further improvement of the technical solution, under the squeezing of the lower edge of the through groove, one end of the first airbag is flat, and the other end expands and presses downward against the insulation box in the stacking area, so that the insulation box moves downward away from the valve plate.

[0011] As a further improvement of the present technical solution, the expansion mechanism includes a second airbag connected to the first airbag and located on the inner side of the side wall of the storage box, the second airbag is in contact with the side wall of the storage box, the bottom of the second airbag is against the bottom of the storage box, and auxiliary plates slidably connected to the storage box are bonded to both sides of the second airbag. Under normal circumstances, the distance between the second airbags on both sides is greater than the width of the die, so as to accommodate the insulation box after demolding.

[0012] As a further improvement of the present technical solution, a hydraulic rod is provided on the storage box above the return spring, and the top end of the hydraulic rod is fixedly connected to a plurality of limit plates corresponding to the mold grooves. The limit plates can be used to limit the inclination of the insulation box so that the insulation box can slide in the vertical direction. The bottom of the limit plate is bent outward to form a bent end, and when the limit plate moves downward, the bent end is used to pass smoothly over the insulation box.

[0013] The second object of the invention is to provide a production line method for operating the EPP molded product including the multi-tank storage described above, comprising the following method steps:

[0014] S1. Prepare raw materials, mix them and inject them into corresponding storage tanks for storage. When the male mold and the female mold are fitted, use high pressure to inject the molten raw materials into the groove in the female mold. The raw materials are cooled in the male mold to solidify the materials.

[0015] S2. Then, the male mold is separated from the mold groove of the female mold, and the female mold is kept fixed. The cooled insulation box is ejected by the ejection mechanism, so that the insulation box slides through the bottom protective net to the finishing area, and then the formed insulation box is manually sorted;

[0016] S3. When the insulation boxes on the protective net are piled up, the wire take-up machine drives the storage box to move upward, and the valve mechanism supports the insulation boxes that have been demoulded, so that the insulation boxes are temporarily stored in the storage box. When demoulding again, the valve mechanism opens to release the stored insulation boxes.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. In the production line of the EPP molded products stored in multiple tanks, the gas at the expanded end of the first airbag is gradually transported into the second airbag until the auxiliary plates on both sides clamp and fix the insulation box. In addition, the expansion of the second airbag is used to abut against the bottom of the storage box, so that the clamped insulation box can be lifted upward to leave a gap for the valve plate to reset in the opposite direction, so that the demoulded insulation box can be temporarily stored in the storage box, and the stored insulation box can be released when the valve plate is opened again, thereby improving the processing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0020] Figure 2 It is a schematic diagram of the structure of the concave mold and the material storage box of the present invention;

[0021] Figure 3 It is a schematic diagram of the explosion structure of the material storage box and the slide rail of the present invention;

[0022] Figure 4 It is a front view of the internal structure of the material storage box of the present invention;

[0023] Figure 5 It is a schematic diagram of the connection structure of the support frame, elastic rope and valve plate of the present invention;

[0024] Figure 6 It is a right view of the internal structure of the material storage box of the present invention;

[0025] Figure 7 For the present invention Figure 6 A is an enlarged structural diagram;

[0026] Figure 8 It is a schematic diagram of the first airbag expansion structure of the present invention;

[0027] Fig. 9 It is a schematic diagram of the valve plate, the first airbag and the return spring structure of the present invention.

[0028] The meaning of each number in the figure is:

[0029] Support frame; 101, concave die; 102, convex die; 103, storage tank; 110, wire take-up machine;

[0030] 120, material storage box; 121, slide plate; 122, slide rail; 123, through slot;

[0031] 130. valve mechanism; 131. valve plate; 132. first airbag; 133. elastic rope; 134. return spring;

[0032] 140. expansion mechanism; 141. second airbag; 142. auxiliary plate;

[0033] 150. Hydraulic rod; 151. Limit plate. DETAILED DESCRIPTION

[0034] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] like Figure 1As shown, a production line for EPP molded products with multi-tank storage is provided, including a support frame 100 and a die 101 and a punch 102 that cooperate with each other and are arranged inside the support frame 100, the die 101 is fixedly connected to the support frame 100, the punch 102 is slidably connected to the support frame 100, and a storage tank 103 for supplying material to the die 101 is arranged on the side close to the die 101.

[0036] Among them, when processing the insulation box, the punch 102 approaches the die 101 and gradually fits with the mold groove of the die 101, and then, the different raw materials in the storage tank 103 are injected into the mold groove through the injection mechanism corresponding to the mold groove for heating, and the raw materials are formed into the shape of a foam box under the action of the punch 102, and then the cooling device is used to cool the finished product in the mold groove. Finally, the punch 102 is separated from the die 101, and the ejection mechanism (such as the ejector block) in the mold groove ejects the formed insulation box, thereby completing the processing of the entire insulation box.

[0037] However, since multiple insulation boxes can be produced in one molding process, the insulation boxes are in a messy state during the sliding process, which will increase the time for manual sorting. If sorting is not done in time, it is easy to cause the foam boxes on the protective net to accumulate, which in turn affects the progress of the processing.

[0038] To this end, Figure 1 Based on and combined with Figure 2 , Figure 4 , Figure 8 As shown, a storage box 120 slidably connected to the support frame 100 is arranged between the die 101 and the punch 102, and the storage box 120 is used to store the insulation box that escapes from the die 101, and a wire take-up machine 110 for controlling the lifting and lowering of the storage box 120 is arranged on the top of the support frame 100, and a valve mechanism 130 elastically connected to the support frame 100 is arranged at the bottom of the storage box 120, and a first air bag 132 is bonded to the bottom of the valve mechanism 130, and the first air bag 132 is connected to an expansion mechanism 140 symmetrically arranged on the side wall of the storage box 120. When accumulation occurs in the unloading area, the valve mechanism 130 drives the first air bag 132 to move so that the first air bag 132 expands to hold the insulation box in the accumulation area, and the expansion mechanism 140 on both sides is used to expand to clamp the insulation box to limit the downward movement of the insulation box.

[0039] That is, when the male die 102 is separated from the female die 101, the wire take-up machine 110 releases the material storage box 120. Figure 3As shown, slides 121 are fixedly connected to both sides of the side walls of the storage box 120, and the slides 121 are slidably connected to slide rails 122 fixed on the support frame 100, wherein the bottom slide rails 122 are used to support the slides 121. When the bottom slide rails 122 are not in contact with the slides 121, the top slide rails 122 are still in a state of sliding connection with the slides 121, so as to maintain the stability of the storage box 120.

[0040] It should be noted that when the material storage box 120 is away from the support frame 100 , that is, the material storage box 120 is located above the support frame 100 , the material storage box 120 will not block the male die 102 from approaching the female die 101 .

[0041] Therefore, based on the above structure, Figure 5 , Figure 6 and Figure 7 As shown, the specific structure of the valve mechanism 130 is further disclosed. The valve mechanism 130 includes a valve plate 131 located at the bottom of the material storage box 120 and slidably connected to the material storage box 120. The valve plate 131 is used to support the demoulding insulation box. Both ends of the valve plate 131 are embedded in the material storage box 120. Both sides of one end of the valve plate 131 are elastically connected to the support frame 100 with elastic ropes 133, and the bottom of the other end is elastically connected to the material storage box 120 with a return spring 134. On the other hand, a through groove 123 is opened on the material storage box 120 corresponding to the valve plate 131. The top of the through groove 123 is in contact with the valve plate 131, and the bottom is in contact with the first air bag 132. Fig. 9 As shown, under normal conditions, the first airbag 132 is inflated. When the valve plate 131 is opened, the lower edge of the through groove 123 is used to squeeze the first airbag 132, so that the first airbag 132 expands and squeezes the insulation box in the stacking area below to control the distance between the insulation box and the valve plate 131.

[0042] During specific operation: during the descending process of the storage box 120, the elastic rope 133 gradually changes from a loose state to a taut state. During this process, under the pulling of the elastic rope 133, the valve plate 131 overcomes the elastic potential energy of the reset spring 134 and moves in the direction away from the die 101. Under the squeezing of the lower edge of the through groove 123, the first air bag 132 has one end that is flat, and the other end expands and presses downward against the insulated box in the stacking area, causing the insulated box to move downward away from the valve plate 131, so as to prevent the insulated box in the stacking area from bulging upward and affecting the reset of the valve plate 131 when the valve plate 131 moves in the opposite direction.

[0043] Then, when the material storage box 120 stops moving downward, the valve plate 131 has completed the opening state, and at this time, the ejection mechanism in the mold groove ejects the formed insulation box to help the insulation box to be separated from the mold groove. If the insulation boxes in the accumulation area have been unblocked at this time, then the insulation box separated from the mold groove can fall directly. If there are still insulation boxes in the accumulation area at this time, the insulation box separated from the mold groove will be supported by the insulation boxes in the accumulation area, which will affect the processing efficiency.

[0044] Therefore, during the expansion of the first airbag 132, since the first airbag 132 is supported by the lower edge of the through groove 123 during movement, the cross-sectional area of ​​the first airbag 132 is reduced, and the gas is concentrated at one end close to the mold groove, causing the end of the first airbag 132 to expand. The first airbag 132 is connected to the second airbag 141, so the internal gas of the squeezed first airbag 132 will also flow to the second airbag 141, causing the first airbag 132 to expand, so that the expansion of the second airbag 141 can be used to clamp the insulation box after demolding.

[0045] Furthermore, based on the above foundation and combined with Figure 3 and Figure 4 As shown, the specific structure of the expansion mechanism 140 is shown. The expansion mechanism 140 includes a second airbag 141 that is connected to the first airbag 132 and is located on the inner side of the side wall of the storage box 120. The second airbag 141 is in contact with the side wall of the storage box 120, and the bottom of the second airbag 141 is against the bottom of the storage box 120. Auxiliary plates 142 that are slidably connected to the storage box 120 are bonded to both sides of the second airbag 141. Under normal conditions, the distance between the second airbags 141 on both sides is greater than the width of the die 101, so as to accommodate the insulation box after demolding.

[0046] That is to say, when Figure 8 When the end of the first airbag 132 is in an expanded state and the insulated box in the stacking area is not unblocked, the gas at the expanded end of the first airbag 132 is gradually transported into the second airbag 141 until the auxiliary plates 142 on both sides clamp and fix the insulated box. In addition, the expansion of the second airbag 141 is used to abut against the bottom of the storage box 120, so that the clamped insulated box can be lifted upward to leave a gap for the valve plate 131 to reset in the opposite direction, thereby temporarily storing the demoulded insulated box in the storage box 120, and releasing the stored insulated box when the valve plate 131 is opened again, thereby improving the processing efficiency.

[0047] Furthermore, when the storage box 120 moves upward, the tension of the elastic rope 133 on the valve plate 131 is weakened. At this time, under the elastic action of the reset spring 134, the valve plate 131 moves in the opposite direction and resets. Moreover, after the second airbag 141 fixes the incubator, the first airbag 132 is still in an expanded state. As the valve plate 131 is reset, the expansion degree of the end of the first airbag 132 gradually decreases and resets. The gas in the second airbag 141 is transported into the first airbag 132, and the clamping force of the second airbag 141 on the incubator is weakened. The incubator changes from being clamped by the second airbag 141 to being supported by the valve plate 131.

[0048] In order to prevent the heat preservation box from being separated from the storage box 120 during the movement on the storage box 120, a hydraulic rod 150 is provided on the storage box 120 above the return spring 134. The top of the hydraulic rod 150 is fixedly connected to a plurality of limit plates 151 corresponding to the die grooves. The bottom of the limit plates 151 is bent outward to form a bent end. When the limit plates 151 move downward, the bent end is used to smoothly pass over the heat preservation box. When the storage box 120 is located between the concave die 101 and the convex die 102, the hydraulic rod 150 pushes the limit plates 151 upward to make the bent end away from the top of the storage box 120, so that the heat preservation box that is easy to demould can smoothly enter the storage box 120.

[0049] When the storage box 120 moves upward, the insulation box inside the storage box 120 protrudes outward, and the hydraulic rod 150 drives the limit plate 151 downward to move. Under the action of the limit plate 151, the insulation box is pushed inward to move away from the mold groove. When the valve plate 131 releases the stored insulation box, the limit plate 151 can be used to limit the outward inclination of the insulation box, so that the insulation box slides in the vertical direction to prevent collision between the insulation box and the mold groove.

[0050] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the present invention and are not intended to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A production line for EPP molded products stored in multiple tanks, comprising a support frame (100) and a die (101) and a punch (102) arranged inside the support frame (100) and cooperating with each other, the die (101) being fixedly connected to the support frame (100), the punch (102) being slidably connected to the support frame (100), and a storage tank (103) for supplying material to the die (101) being arranged on a side close to the die (101), characterized in that: A material storage box (120) slidably connected to the support frame (100) is provided between the female die (101) and the male die (102); the material storage box (120) is used to store the heat preservation box that escapes from the female die (101); a wire take-up machine (110) for controlling the lifting and lowering of the material storage box (120) is provided on the top of the support frame (100); and a valve mechanism (130) elastically connected to the support frame (100) is provided at the bottom of the material storage box (120). A first airbag (132) is bonded to the bottom of the valve mechanism (130), and the first airbag (132) is connected to an expansion mechanism (140) symmetrically arranged on the side wall of the material storage box (120). When accumulation occurs in the material discharge area, the valve mechanism (130) drives the first airbag (132) to move so that the first airbag (132) expands to hold the heat preservation box in the accumulation area, and the expansion mechanisms (140) on both sides expand to clamp the heat preservation box, so as to limit the downward movement of the heat preservation box.

2. The production line of EPP molded products stored in multiple tanks according to claim 1, characterized in that: Slide plates (121) are fixedly connected to both sides of the side walls of the material storage box (120), and the slide plates (121) are slidably connected to slide rails (122) fixed on the support frame (100), wherein the bottom slide rails (122) are used to support the slide plates (121), and when the bottom slide rails (122) are not in contact with the slide plates (121), the top slide rails (122) are still in a state of being slidably connected to the slide plates (121), so as to maintain the stability of the material storage box (120).

3. The production line of EPP molded products stored in multiple tanks according to claim 1, characterized in that: The valve mechanism (130) comprises a valve plate (131) located at the bottom of the material storage box (120) and slidably connected to the material storage box (120); the valve plate (131) is used to support the demoulding insulation box; both ends of the valve plate (131) are embedded in the material storage box (120); both sides of one end of the valve plate (131) are elastically connected to the support frame (100) by elastic ropes (133); and the bottom of the other end is elastically connected to the material storage box (120) by a return spring (134).

4. The production line of EPP molded products stored in multiple tanks according to claim 3, characterized in that: A through groove (123) is provided on the material storage box (120) corresponding to the valve plate (131). The top of the through groove (123) is in contact with the valve plate (131), and the bottom is in contact with the first air bag (132). Under normal conditions, the first air bag (132) is in an inflated state. When the valve plate (131) is opened, the lower edge of the through groove (123) is used to squeeze the first air bag (132), so that the first air bag (132) expands and squeezes the heat preservation box in the stacking area below, so as to control the distance between the heat preservation box and the valve plate (131).

5. The production line of EPP molded products stored in multiple tanks according to claim 4, characterized in that: Under the pressure of the lower edge of the through groove (123), one end of the first airbag (132) is flat, and the other end expands and presses downward against the heat preservation box in the stacking area, so that the heat preservation box moves downward away from the valve plate (131).

6. The production line of EPP molded products stored in multiple tanks according to claim 1, characterized in that: The expansion mechanism (140) comprises a second airbag (141) which is in communication with the first airbag (132) and is located on the inner side of the side wall of the material storage box (120); the second airbag (141) is in contact with the side wall of the material storage box (120); the bottom of the second airbag (141) is in contact with the bottom of the material storage box (120); and auxiliary plates (142) which are slidably connected to the material storage box (120) are bonded to both sides of the second airbag (141); in a normal state, the distance between the second airbags (141) on both sides is greater than the width of the concave mold (101) so as to accommodate the thermal insulation box after demoulding.

7. The production line of EPP molded products stored in multiple tanks according to claim 3, characterized in that: A hydraulic rod (150) is provided on the material storage box (120) above the return spring (134); a plurality of limit plates (151) corresponding to the mold grooves are fixedly connected to the top of the hydraulic rod (150); the limit plates (151) can be used to limit the outward tilt of the heat preservation box so that the heat preservation box slides in the vertical direction; the bottom of the limit plate (151) is bent outward to form a bent end; when the limit plate (151) moves downward, the bent end is used to smoothly pass over the heat preservation box.

8. A production method for operating a production line comprising a multi-can storage EPP molded product as claimed in claim 1, characterized in that: The method comprises the following steps: S1, preparing raw materials, and injecting the raw materials into corresponding storage tanks (103) for storage after mixing them. When the male mold (102) and the female mold (101) are fitted together, the molten raw materials are injected into the groove in the female mold (101) by high pressure, and the raw materials are cooled in the male mold (102) to solidify the materials; S2, then, the male mold (102) is separated from the mold groove of the female mold (101), the female mold (101) is kept fixed, and the cooled insulation box is ejected by an ejection mechanism, so that the insulation box slides through the bottom protection net to the sorting area, and then the formed insulation box is sorted manually; S3. When the insulation boxes on the protective net are piled up, the wire take-up machine (110) drives the storage box (120) to move upward, and the valve mechanism (130) supports the insulation boxes that have been demoulded, so that the insulation boxes are temporarily stored in the storage box (120). When demoulding again, the valve mechanism (130) opens to release the stored insulation boxes.

Images