Paper plastic product cold extrusion equipment

Abstract

The invention discloses a paper-plastic product cold extrusion device, comprising a frame, an upper template, a lower template and a clamping jaw, wherein the upper template is fixed on the frame, and the upper template is connected with an air pipe; the lower template is arranged below the upper template, and the lower template is connected with a lifting mechanism, and the upper template and the lower template can be molded together to construct a mold cavity for a built-in product between the upper template and the lower template; the clamping jaw is movably connected to both sides of the frame, and the ends of the clamping jaws are provided with hooks, and the two hooks can be respectively engaged with both sides of the lower template to make the upper template and the lower template molded together; wherein one end of the air pipe passes through the upper template and extends into the mold cavity, and the other end is connected with a high-pressure gas source. By injecting high-pressure gas during the mold closing process, the mold cavity is in a high-pressure state, extruding the surface of the product, and thus better attaching the additive to the surface of the product.

Description

Technical Field

[0001] The invention relates to paper-plastic product processing equipment, in particular to a paper-plastic product cold extrusion equipment. Background Art

[0002] The paper molding industry is similar to the papermaking industry. Its molding process has several stages, including pulp preparation, molding dehydration, and drying and shaping. However, paper molding production is different from papermaking, and people also call it three-dimensional papermaking. In the actual processing process, the paper blank after hot pressing needs to be attached with additives, such as dyes, etc., but the additives on the surface cannot be stably attached to the surface of the paper blank when the paper blank is squeezed by general mold closing.

[0003] The invention patent with application number CN202010386722.0 discloses a cold extrusion device for a pulp molding machine, which is arranged above the rotary drum of the pulp molding machine, and includes a frame, a rotating shaft, a connecting rod, a pull rod arranged inside the frame, a guide mechanism, and a cold extrusion die. The rotating shaft is rotatably arranged at the top of the frame, and one connecting rod is hinged at each end of the rotating shaft. The other end of the connecting rod is connected to the driving mechanism of the pulp molding machine, one end of the pull rod is connected to the rotating shaft, and the other end is hinged to the guide mechanism, and the cold extrusion die is arranged at the lower end of the guide mechanism. The present invention provides a cold extrusion die that matches the punch on the rotary drum, and ensures that the cold extrusion die reciprocates in the vertical direction, so that the product is cold extruded after molding and before hot pressing, which can not only squeeze out the moisture in the wet blank, but also remove burrs, improve the thickness of the product, and improve the surface quality of the product.

[0004] In the disclosed solution, the cold extrusion die uses the pressure of the die on the product to perform cold extrusion, which cannot solve the problem that the additives on the surface of the product cannot adhere better. Summary of the invention

[0005] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides a paper plastic product cold extrusion device, which can better ensure that the additives are attached to the surface of the product.

[0006] According to the first aspect of the present invention, the paper-plastic product cold extrusion equipment includes a frame, an upper template, a lower template and a clamping jaw, the upper template is fixed on the frame, and the upper template is connected to an air pipe; the lower template is arranged below the upper template, and the lower template is connected to a lifting mechanism, the upper template and the lower template can be molded together to construct a mold cavity for built-in products between the upper template and the lower template; the clamping jaw is movably connected to both sides of the frame, and the end of the clamping jaw is provided with a hook portion, and the two hook portions can be respectively clamped with the two sides of the lower template to make the upper template and the lower template molded together; wherein one end of the air pipe passes through the upper template and extends into the mold cavity, and the other end is connected to a high-pressure gas source.

[0007] The cold extrusion equipment for paper-plastic products according to the embodiment of the present invention has at least the following beneficial effects: by injecting high-pressure gas during the mold closing process, the mold cavity is placed in a high-pressure state, extruding the surface of the product, thereby better adhering the additive to the surface of the product.

[0008] According to some embodiments of the present invention, the upper mold plate is connected to an exhaust pipe, one end of the exhaust pipe extends into the mold cavity, and the other end is provided with an exhaust valve.

[0009] According to some embodiments of the present invention, the exhaust valve is a solenoid valve, and an air pressure sensor is built into the mold cavity. The air pressure sensor is electrically connected to the solenoid valve to control the on and off of the solenoid valve.

[0010] According to some embodiments of the present invention, one end of the clamp is rotatably connected to the lower end of the frame, and the other end is provided with the clamp, and the clamp is connected to a driving mechanism, and the driving mechanism is used to drive the clamp to swing.

[0011] According to some embodiments of the present invention, the driving mechanism includes a lifting plate, a first connecting rod, a second connecting rod and a third connecting rod, and the lifting plate can be lifted and lowered in the frame; one end of the first connecting rod is rotatably connected to the upper end of the frame; one end of the second connecting rod is rotatably connected to one side of the lifting plate, and the other end is rotatably connected to an end of the first connecting rod away from the frame, and the first connecting rod and the second connecting rod form an angle; one end of the third connecting rod is rotatably connected to the first connecting rod, and the other end is rotatably connected to the middle part of the clamp.

[0012] According to some embodiments of the present invention, a plurality of the clamping jaws, the first connecting rod, the second connecting rod and the third connecting rod are provided on the same side of the frame, wherein:

[0013] The upper end of the frame is fixedly connected with a first synchronization rod, and a plurality of the first connection rods are rotatably connected to the first synchronization rod;

[0014] The other end of the first connecting rod is fixedly connected to the second synchronization rod and the third synchronization rod, one end of a plurality of the second connecting rods away from the lifting plate is rotatably connected to the second synchronization rod, and a plurality of the third connecting rods are rotatably connected to the third synchronization rod;

[0015] A fourth synchronization rod is fixedly connected to the lower end of the frame, and ends of the plurality of clamping claws are rotationally connected to the fourth synchronization rod;

[0016] A fifth synchronization rod is fixedly connected between the plurality of clamping jaws, and the plurality of third connecting rods are rotationally connected to the fifth synchronization rod.

[0017] According to some embodiments of the present invention, the lifting plate is connected to a cylinder for driving the lifting plate to move.

[0018] According to some embodiments of the present invention, the gas pressure of the high-pressure gas source is 2 MPa.

[0019] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0021] Figure 1 It is a schematic diagram of the paper-plastic product cold extrusion equipment before pressing according to an embodiment of the present invention;

[0022] Figure 2 A cross-sectional schematic diagram of a cold extrusion device for paper-plastic products in a compression process according to an embodiment of the present invention

[0023] Figure 3 This is a schematic diagram of the connection between the frame and the driving mechanism of the paper-plastic product cold extrusion equipment according to an embodiment of the present invention (clamped state);

[0024] Figure 4 This is a schematic diagram of the connection between the frame and the driving mechanism of the paper-plastic product cold extrusion equipment according to an embodiment of the present invention (loose state).

[0025] 100, frame; 200, upper template; 210, gas pipe; 220, exhaust pipe; 300, lower template; 310, lifting mechanism; 400, clamping claw; 410, hook; 420, fourth synchronization rod; 430, fifth synchronization rod; 500, driving mechanism; 510, lifting plate; 511, cylinder; 520, first connecting rod; 521, first synchronization rod; 530, second connecting rod; 531, second synchronization rod; 540, third connecting rod; 541, third synchronization rod; DETAILED DESCRIPTION

[0026] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0027] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., and orientations or positional relationships indicated are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0028] In the description of the present invention, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed" etc. are understood as not including the number itself, and "above", "below", "within" etc. are understood as including the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0029] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0030] Reference Figures 1 to 4 The paper-plastic product cold extrusion equipment in the embodiment of the present invention comprises a frame 100, an upper template 200, a lower template 300 and a clamping jaw 400. The upper template 200 is fixed on the frame 100, and the upper template 200 is connected to an air pipe 210; the lower template 300 is arranged below the upper template 200, and the lower template 300 is connected to a lifting mechanism 310. The upper template 200 and the lower template 300 can be molded together to construct a mold cavity for built-in products between the upper template 200 and the lower template 300; the clamping jaw 400 is movably connected to both sides of the frame 100, and the end of the clamping jaw 400 is provided with a hook portion 410, and the two hook portions 410 can be respectively engaged with both sides of the lower template 300 to make the upper template 200 and the lower template 300 molded together; wherein, one end of the air pipe 210 passes through the upper template 200 and extends into the mold cavity, and the other end is connected to a high-pressure gas source.

[0031] In actual use, there are the following steps:

[0032] Step 1: Place the product in the lower template 300;

[0033] Step 2: The lower mold plate 300 is raised to a position matching with the upper mold plate 200 by the lifting mechanism 310, and the mold is closed;

[0034] Step 3: Drive the clamping jaws 400 on both sides so that the two hooks 410 of the clamping jaws 400 are respectively engaged with the two sides of the lower template 300 to clamp the upper template 200 and the lower template 300;

[0035] Step 4: Input high-pressure gas into the mold cavity through the gas pipe 210;

[0036] Step 5: After maintaining the mold clamping state for 5-10 seconds, the clamping jaws 400 are driven to release the lower mold plate 300, and the lifting mechanism 310 is used to drive the lower mold plate 300 to descend, thereby completing the mold separation.

[0037] In summary, during the entire processing process, high-pressure gas is injected during the mold closing process to make the mold cavity in a high-pressure state, which squeezes the surface of the product and thereby better adheres the additives to the surface of the product.

[0038] Specifically, in order to ensure that the air pressure in the mold cavity is sufficient to improve the quality of adhesion, the air pressure of the high-pressure air source is 2 MPa, ensuring that the air pressure in the mold cavity can adhere the additive to the surface of the product.

[0039] In some embodiments, the upper mold plate 200 is connected to an exhaust pipe 220, one end of the exhaust pipe 220 extends into the mold cavity, and the other end is provided with an exhaust valve. The function of the exhaust pipe 220 is to discharge excess gas in the mold cavity. Specifically, since high-pressure gas needs to be injected during the mold closing process, the air pressure in the mold cavity will gradually rise. In order to avoid excessive air pressure in the mold cavity, which affects the molding of the product and the adhesion of additives, when the air pressure is too high, the exhaust pipe 220 is opened through the exhaust valve and the gas in the mold cavity is discharged to reduce the pressure.

[0040] Preferably, the exhaust valve is a solenoid valve, and a pressure sensor is built into the mold cavity, and the pressure sensor and the solenoid valve are electrically connected to control the on and off of the solenoid valve. The pressure sensor is used to monitor the pressure in the mold cavity in real time, and the pressure in the mold cavity can be automatically adjusted to improve the automation of the entire processing process.

[0041] It should be mentioned that one end of the clamp 400 is rotatably connected to the lower end of the frame 100, and the other end is provided with the clamp 400, and the clamp 400 is connected to the driving mechanism 500, and the driving mechanism 500 is used to drive the clamp 400 to swing. In step 3, the driving mechanism 500 drives the clamp 400 to rotate, thereby controlling the hook 410 of the clamp 400 to engage with or disengage from the lower template 300.

[0042] Furthermore, the above-mentioned driving mechanism 500 includes a lifting plate 510, a first connecting rod 520, a second connecting rod 530 and a third connecting rod 540. The lifting plate 510 can be lifted and lowered in the frame 100; one end of the first connecting rod 520 is rotatably connected to the upper end of the frame 100; one end of the second connecting rod 530 is rotatably connected to one side of the lifting plate 510, and the other end is rotatably connected to an end of the first connecting rod 520 away from the frame 100, and the first connecting rod 520 and the second connecting rod 530 form an angle; one end of the third connecting rod 540 is rotatably connected to the first connecting rod 520, and the other end is rotatably connected to the middle part of the clamp 400.

[0043] Among them, the first connecting rod 520, the second connecting rod 530 and the third connecting rod 540 form a connecting rod mechanism. Through the lifting and lowering of the lifting plate 510 and the activity constraints between the connecting rod mechanisms, the clamp 400 can swing up or down around the axis. When the clamp 400 swings up, the clamp 400 and the lower template 300 are separated. When the clamp 400 swings down, the clamp 400 can approach the side of the lower template 300 and engage with the side of the lower template 300, thereby clamping the upper template 200 and the lower template 300 to ensure that the high-pressure gas will not leak.

[0044] To improve the tightness of the clamp, refer to Figure 3 and Figure 4 On the same side of the frame 100, a plurality of clamping jaws 400, a first connecting rod 520, a second connecting rod 530 and a third connecting rod 540 are provided, wherein the upper end of the frame 100 is fixedly connected with the first synchronization rod 521, and the plurality of first connecting rods 520 are rotatably connected to the first synchronization rod 521; the other end of the first connecting rod 520 is fixedly connected with the second synchronization rod 531 and the third synchronization rod 541, one end of the plurality of second connecting rods 530 away from the lifting plate 510 is rotatably connected to the second synchronization rod 531, and the plurality of third connecting rods 540 are rotatably connected to the third synchronization rod 541; the lower end of the frame 100 is fixedly connected with the fourth synchronization rod 420, and the ends of the plurality of clamping jaws 400 are rotatably connected to the fourth synchronization rod 420; the fifth synchronization rod 430 is fixedly connected between the plurality of clamping jaws 400, and the plurality of third connecting rods 540 are rotatably connected to the fifth synchronization rod 430.

[0045] By utilizing the linkage cooperation of the first synchronization rod 521, the second synchronization rod 531, the third synchronization rod 541, the fourth synchronization rod 420 and the fifth synchronization rod 430, multiple jaws 400 can move synchronously. Specifically, the jaws 400 on the same side can maintain synchronized movements and movement amplitudes during the upward and downward swinging processes.

[0046] The lifting plate 510 is connected to a cylinder 511 for driving the lifting plate 510 to move.

[0047] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of ordinary technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. A paper plastic product cold extrusion equipment, characterized in that: include: Rack(100); An upper template (200) is fixed on the frame (100), and the upper template (200) is connected to a gas pipe (210); A lower template (300) is arranged below the upper template (200); the lower template (300) is connected to a lifting mechanism (310); the upper template (200) and the lower template (300) can be molded together to construct a mold cavity for a built-in product between the upper template (200) and the lower template (300); A clamping jaw (400) is movably connected to two sides of the frame (100), and a hook portion (410) is provided at the end of the clamping jaw (400). The two hook portions (410) can be respectively engaged with two sides of the lower template (300) to close the mold of the upper template (200) and the lower template (300); One end of the air delivery pipe (210) passes through the upper mold plate (200) and extends into the mold cavity, and the other end is connected to a high-pressure air source; One end of the clamp (400) is rotatably connected to the lower end of the frame (100), and the other end is provided with the clamp (400). The clamp (400) is connected to a driving mechanism (500), and the driving mechanism (500) is used to drive the clamp (400) to swing; The driving mechanism (500) comprises: A lifting plate (510) is installed in the frame (100) in a liftable manner; A first connecting rod (520), one end of which is rotatably connected to the upper end of the frame (100); a second connecting rod (530), one end of which is rotatably connected to one side of the lifting plate (510), and the other end of which is rotatably connected to an end of the first connecting rod (520) away from the frame (100), wherein the first connecting rod (520) and the second connecting rod (530) form an angle; a third connecting rod (540), one end of which is rotatably connected to the first connecting rod (520), and the other end of which is rotatably connected to the middle part of the clamping jaw (400); On the same side of the frame (100), a plurality of the clamping claws (400), a first connecting rod (520), a second connecting rod (530) and a third connecting rod (540) are arranged, wherein: A first synchronization rod (521) is fixedly connected to the upper end of the frame (100), and a plurality of the first connection rods (520) are rotatably connected to the first synchronization rod (521); The other end of the first connecting rod (520) is fixedly connected to a second synchronization rod (531) and a third synchronization rod (541); one end of a plurality of the second connecting rods (530) away from the lifting plate (510) is rotationally connected to the second synchronization rod (531); and a plurality of the third connecting rods (540) are rotationally connected to the third synchronization rod (541); A fourth synchronization rod (420) is fixedly connected to the lower end of the frame (100), and ends of a plurality of the clamping claws (400) are rotationally connected to the fourth synchronization rod (420); A fifth synchronization rod (430) is fixedly connected between the plurality of clamping jaws (400), and the plurality of third connection rods (540) are rotationally connected to the fifth synchronization rod (430).

2. The paper plastic product cold extrusion equipment according to claim 1, characterized in that: The upper mold plate (200) is connected to an exhaust pipe (220), one end of the exhaust pipe (220) extends into the mold cavity, and the other end is provided with an exhaust valve.

3. The paper plastic product cold extrusion equipment according to claim 2, characterized in that: The exhaust valve is a solenoid valve, and an air pressure sensor is built into the mold cavity. The air pressure sensor is electrically connected to the solenoid valve to control the on and off of the solenoid valve.

4. The paper plastic product cold extrusion equipment according to claim 1, characterized in that: The lifting plate (510) is connected to a cylinder (511) for driving the lifting plate (510) to move.

5. The paper plastic product cold extrusion equipment according to claim 1, characterized in that: The air pressure of the high-pressure air source is 2 MPa.

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