Injection molding equipment for producing and processing preservation box cover

Abstract

The invention is applicable to the technical field of injection molding, and provides injection molding equipment for producing and processing a preservation box cover, which comprises a lower mold assembly, and the lower mold assembly is in sliding fit with an upper mold assembly; the lower mold assembly comprises a lower mold part and a top cover part fixedly connected to the top of the lower mold part. The upper mold assembly comprises an upper mold part, a sliding part and a demolding part, the sliding part is arranged on the upper mold part in a sliding fit mode, the demolding part is arranged in the upper mold part in a sliding fit mode, the demolding part is located below the sliding part, and the demolding part is in sliding fit with the sliding part. The problems that columnar excess materials are easy to remain in an injection molding pipe, the formed preservation box cover is easy to adhere to the surface of a forming convex block after being cooled, and some waste materials are easy to remain on the surface of the forming convex block, so that the subsequent preservation box cover production process is influenced are solved.

Description

Technical Field

[0001] The invention relates to the technical field of injection molding, and more specifically, to an injection molding device for producing and processing a fresh-keeping box cover. Background Art

[0002] The injection molding process used in the production and processing of fresh-keeping box lids is a method of making plastic products. The molten plastic is injected into the plastic product mold under pressure, and the desired fresh-keeping box lid is obtained by cooling and molding. Currently, the most commonly used plastics for fresh-keeping box lids are polyethylene, polypropylene, ABS, PA, and polystyrene.

[0003] At present, the injection molding process used in the production and processing of fresh-keeping box covers on the market has the following technical problems when molding plastics in a molten state: When the existing injection molding equipment for producing and processing fresh-keeping box lids performs injection molding on plastics in a molten state, most of the equipment lacks some structures for pushing and cleaning the residual materials and waste materials, which results in residual columnar materials remaining inside the injection molding tube. In addition, the formed fresh-keeping box lids are also easily adhered to the surface of the molding protrusions after cooling treatment. At the same time, some waste materials are also easily left on the surface of the molding protrusions, thereby affecting the subsequent production process of the fresh-keeping box lids. Summary of the invention

[0004] In view of the deficiencies in the prior art, the object of the present invention is to provide an injection molding device for the production and processing of fresh-keeping box covers, which can push and clean the surface of the molding protrusion, prevent the already formed fresh-keeping box cover from adhering to the surface of the molding protrusion, and at the same time can scrape and clean the excess columnar residue remaining inside the injection molding tube.

[0005] To achieve the above object, the present invention provides the following technical solutions: An injection molding device for producing and processing a fresh-keeping box cover comprises a lower mold component on which an upper mold component is slidably matched.

[0006] The lower mold assembly includes a lower mold part and a top cover part fixedly connected to the top of the lower mold part.

[0007] The upper mold assembly comprises an upper mold part, a sliding part slidably matched on the upper mold part, and a demoulding part slidably matched inside the upper mold part. The demoulding part is located below the sliding part, and the demoulding part slidably matches with the sliding part.

[0008] The lower mold part comprises a plurality of guide columns, a lower base plate is inserted and fixed between the plurality of guide columns, a lower mold is fixed on the top of the lower base plate, and a molding groove is formed on the top of the lower mold.

[0009] The top cover member includes a top cover plate which is plugged and fixed on the top of several guide columns. A feed hole is opened through the center of the bottom of the top cover plate. A vertical plate is fixed at the bottom of the top cover plate off-center. The first lever which slidably cooperates with the sliding member is fixed on the two opposite sides of the vertical plate near the bottom.

[0010] The upper mold part includes a displacement plate that is slidably matched on a plurality of guide pillars, a molding protrusion that is matched with a molding groove is fixed at the bottom of the displacement plate, and a demoulding groove that is slidably matched with a demoulding part is opened through the top of the displacement plate downward.

[0011] The present invention is further configured as follows: a plurality of guide holes are formed through the top of the displacement plate, and the plurality of guide holes are respectively slidably matched with a plurality of guide posts.

[0012] The top of the displacement plate is connected with an injection tube, the top of the injection tube is connected with an injection funnel, the bottom of the molding protrusion is penetrated with an injection port extending upward, the injection port is connected with the injection tube, and an L-shaped connecting plate is fixed between the displacement plate and the injection tube.

[0013] The present invention is further configured as follows: two symmetrical built-in grooves are provided on the top of the displacement plate and inside the forming groove.

[0014] Two symmetrical guide cross bars are fixed to the inner wall of the built-in groove near the bottom, and a movable groove is provided on the inner wall of the built-in groove near the bottom and passes through the two guide cross bars. A T-shaped slide plate is slidably fitted between the two guide cross bars, and two return springs are fixed between the T-shaped slide plate and the built-in groove and are respectively sleeved on the two guide cross bars.

[0015] The present invention is further configured as follows: a positioning plate is fixed on one side of the displacement plate, a U-shaped plate is fixed on the top of the positioning plate, an L-shaped push-pull plate is slidably fitted on the inner wall of the U-shaped plate, a first hinged seat is fixed on the top of the L-shaped push-pull plate, and an hinged arm is hingedly fitted inside the first hinged seat.

[0016] A U-shaped vertical plate is fixed on the outer top of the U-shaped plate, and limiting grooves are provided on the two inner side walls of the U-shaped vertical plate. A second hinged seat hingedly matched with the hinged arm is slidably fitted between the two limiting grooves, and two symmetrical elastic springs are fixed between the second hinged seat and the U-shaped vertical plate.

[0017] The present invention is further configured as follows: a plurality of plug-in tubes are fixed to the bottom of the top cover plate and are respectively plugged and fixed to a plurality of guide pillars.

[0018] A connecting transverse plate is fixed on the inner wall of the feed hole, and a conducting rod which is slidably matched with the injection tube is fixed at the center position of the bottom of the connecting transverse plate.

[0019] A moving plate slidingly fitted in the moving groove is fixed on one side of the T-shaped slide plate, a through hole is penetrated through the center position of the top of the moving plate, and an annular cutting knife is fixed on the inner wall of the through hole.

[0020] The present invention is further configured as follows: the demolding part includes a demolding frame that is slidably fitted in the demolding groove, and two rectangular grooves are opened through the top of the demolding frame, which are respectively slidably fitted with the L-shaped connecting plate and the L-shaped push-pull plate; two symmetrical trapezoidal plates are fixed to the top of the demolding frame, and a first inclined groove is opened through one side of the two trapezoidal plates.

[0021] The present invention is further configured such that: guide grooves are provided on two opposite side surfaces of the displacement plate.

[0022] The sliding member includes two U-shaped sliding plates respectively slidingly fitted in the two guide grooves, and a rectangular sliding plate is fixed to the opposite side of the two U-shaped sliding plates. A second inclined groove is penetrated on one side of the two rectangular sliding plates and respectively slidingly fitted on the two first shifting rods.

[0023] The present invention is further configured as follows: a moving frame is fixed between the two rectangular slides, a placement groove is penetrated through the top of the moving frame, two symmetrical vertical baffles are fixed to the bottom of the moving frame, and the second shifting rod that slides and fits inside the first inclined groove is fixed to the side opposite to each other of the two vertical baffles, a gantry is fixed to the top of the moving frame above the placement groove, an extension rod is fixed to the top of the gantry, a T-shaped vertical plate is fixed to the bottom of the extension rod, and a downward pressure rod that fits with the hinged arm is fixed to the bottom of the T-shaped vertical plate.

[0024] The top of the top cover plate is provided with two limiting grooves which are respectively slidably matched with the two rectangular slide plates.

[0025] The present invention is further configured as follows: a mounting base plate is fixed at the bottom of several guide columns, a fixing plate is fixed on one side of the mounting base plate, a hydraulic telescopic cylinder is fixed on the top of the fixing plate, and a connecting flange fixedly connected to the bottom of the positioning plate is fixed on the top of the hydraulic telescopic cylinder.

[0026] Two symmetrical positioning base plates are fixed between the plurality of guide columns, and threaded columns which are plugged and fixed with the lower base plate are fixed on the tops of the two positioning base plates.

[0027] The present invention is further configured as follows: a cooling cavity is opened inside the lower mold, a liquid outlet pipe connected to the cooling cavity is provided on an outer side surface of the lower mold, a feed pipe connected to the cooling cavity is provided at the center position of the bottom of the lower mold, the bottom of the feed pipe is connected to a piston cylinder, the peripheral side of the feed pipe is connected to the feed pipe, a piston rod is slidably fitted inside the piston cylinder, a liquid inlet pipe is provided on the outer peripheral side of the feed pipe, and a coolant storage tank is provided between the liquid inlet pipe and the liquid outlet pipe via a hose.

[0028] Two symmetrical guide vertical rods are fixed on the top of the mounting base plate, a reciprocating plate fixedly connected to the bottom of the piston rod is slidably fitted between the two guide vertical rods, two reciprocating springs respectively sleeved on the two guide vertical rods are fixed between the reciprocating plate and the mounting base plate, a driving motor is fixed on the top of the mounting base plate, and a cam is fixed on the output shaft of the driving motor.

[0029] The advantages of the present invention are: 1. The present invention pushes and cleans the surface of the molding protrusion by moving the demolding frame downward inside the demolding groove, thereby preventing the already formed fresh-keeping box cover from adhering to the surface of the molding protrusion and scraping and cleaning the residual material adhering to the surface of the molding protrusion, thereby preventing the residual material adhering to the molding protrusion from being cleaned in time during the subsequent molding process.

[0030] 2. The present invention drives the articulated arm to hinge and press down and rotate between the first articulated seat and the second articulated seat through the sliding contact process between the pressing rod and the articulated arm, thereby providing a sliding force for the L-shaped push-pull plate that slides on the inner wall of the U-shaped plate, so that the L-shaped push-pull plate moves closer to the outer peripheral side of the injection tube on the inner wall of the U-shaped plate, and pushes the annular cutting knife fixedly connected to the inner wall of the through hole to move synchronously in the direction away from the outer peripheral side of the injection tube, so that the annular cutting knife completes the cutting of the excess columnar residue to avoid it affecting the subsequent injection molding process, thereby cutting the excess columnar residue remaining in the injection molding tube to avoid the residual columnar residue in the injection molding tube affecting the subsequent injection molding process of the fresh-keeping box cover, thereby improving the molding effect of the fresh-keeping box cover.

[0031] 3. The present invention causes the injection molding funnel connected to the top of the injection molding tube to gradually approach the conducting rod fixed at the bottom center of the connecting cross plate through the rising of the displacement plate. The columnar residual material adhering to the inside of the injection molding tube is ejected through the sliding process of the conducting rod inside the injection molding tube, thereby preventing the columnar residual material remaining in the injection molding tube from affecting the subsequent injection molding process during the subsequent injection molding of the fresh-keeping box cover. At the same time, the fresh-keeping box cover adhering to the surface of the molding protrusion can also be demolded by auxiliary means, thereby improving the injection molding effect of the fresh-keeping box cover. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 The present invention is a schematic structural diagram of an injection molding device for producing and processing a fresh-keeping box cover.

[0033] Figure 2 It is a structural schematic diagram of the lower mold assembly of the present invention.

[0034] Figure 3 It is a structural schematic diagram of the upper mold assembly of the present invention.

[0035] Figure 4 It is a structural schematic diagram of the lower mold part of the present invention.

[0036] Figure 5 It is a schematic diagram of the cross-sectional structure of the lower mold part of the present invention.

[0037] Figure 6 It is a front view of the cross-sectional structure of the lower mold member of the present invention.

[0038] Figure 7 It is a schematic structural diagram of the top cover member of the present invention.

[0039] Figure 8 It is a structural schematic diagram of the upper mold part of the present invention.

[0040] Fig. 9 It is a top view of the upper mold part of the present invention.

[0041] Fig.10 It is a schematic diagram of the cross-sectional structure of the upper mold part of the present invention.

[0042] Fig.11 It is a schematic structural diagram of the sliding member of the present invention.

[0043] Fig.12 It is a schematic structural diagram of the demoulding part of the present invention.

[0044] In the figure: 1, lower mold assembly; 2, upper mold assembly; 3, lower mold piece; 4, top cover piece; 5, upper mold piece; 6, sliding piece; 7, demoulding piece; 301, guide column; 302, lower bottom plate; 303, lower mold; 304, molding groove; 305, mounting bottom plate; 306, fixing plate; 307, hydraulic telescopic cylinder; 308, connecting flange; 309, positioning bottom plate; 310, threaded column; 311, cooling cavity; 312, liquid outlet pipe; 313, feed tube; 314, piston cylinder; 315, piston rod; 316, guide vertical rod; 317, reciprocating plate; 318, reciprocating spring; 319, driving motor; 320, cam; 321, liquid inlet pipe; 401, top cover plate; 402, feed hole; 403, vertical plate; 404, first lever; 405, plug-in cylinder; 406, connecting horizontal plate; 407, conducting rod; 408, limiting groove; 501, displacement plate; 502, molding protrusion; 503, demoulding groove; 504, Guide hole; 505, injection tube; 506, injection funnel; 507, injection port; 508, L-shaped connecting plate; 509, built-in groove; 510, guide cross bar; 511, moving groove; 512, T-shaped slide plate; 513, return spring; 514, positioning plate; 515, U-shaped plate; 516, L-shaped push-pull plate; 517, first hinge seat; 518, hinge arm; 519, U-shaped vertical plate; 520, limit groove; 521, second hinge seat; 522, elastic spring ; 523, movable plate; 524, through hole; 525, annular cutting knife; 526, guide groove; 601, U-shaped sliding plate; 602, rectangular sliding plate; 603, second inclined groove; 604, movable frame; 605, placement groove; 606, vertical baffle; 607, second lever; 608, gantry; 609, extension rod; 610, T-shaped vertical plate; 611, downward pressure rod; 701, demoulding frame; 702, rectangular groove; 703, trapezoidal plate; 704, first inclined groove. DETAILED DESCRIPTION

[0045] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application may be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0046] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meanings as commonly understood by ordinary technicians in the technical field to which this application belongs.

[0047] In the present invention, unless otherwise specified, the directions used, such as "up" and "down", usually refer to the directions shown in the drawings, or to the vertical, perpendicular or gravity directions; similarly, for ease of understanding and description, "left" and "right" usually refer to the left and right shown in the drawings; "inside" and "outside" refer to the inside and outside relative to the outline of each component itself, but the above-mentioned directions are not used to limit the present invention.

[0048] For example, see Figure 1-12 , the present invention provides the following technical solutions: An injection molding device for producing and processing fresh-keeping box lids, specifically, 1. It includes a lower mold assembly 1, on which an upper mold assembly 2 is slidably matched; the lower mold assembly 1 includes a lower mold part 3 and a top cover part 4 fixedly connected to the top of the lower mold part 3; the upper mold assembly 2 includes an upper mold part 5, a sliding part 6 slidably matched on the upper mold part 5, and a demolding part 7 slidably matched inside the upper mold part 5, the demolding part 7 is located below the sliding part 6, and the demolding part 7 and the sliding part 6 are slidably matched; the lower mold part 3 includes a plurality of guide columns 301, a lower bottom plate 302 is inserted and fixed between the plurality of guide columns 301, a lower mold 303 is fixed on the top of the lower bottom plate 302, and a lower mold 303 is fixed on the top of the lower bottom plate 302. A molding groove 304 is provided at the top of the mold 303; the top cover member 4 includes a top cover plate 401 plugged and fixed on the top of the plurality of guide pillars 301, a feed hole 402 is provided through the center of the bottom of the top cover plate 401, a vertical plate 403 is fixed to the bottom of the top cover plate 401 at a position off the center, and first levers 404 that are slidably matched with the sliding member 6 are fixed to the opposite sides of the vertical plate 403 near the bottom; the upper mold member 5 includes a displacement plate 501 that is slidably matched with the plurality of guide pillars 301, a molding protrusion 502 that is matched with the molding groove 304 is fixed to the bottom of the displacement plate 501, and a demoulding groove 503 that is slidably matched with the demoulding member 7 is provided through the top of the displacement plate 501 downwardly; Furthermore, a plurality of guide holes 504 are formed through the top of the displacement plate 501, and the plurality of guide holes 504 are respectively slidably matched with the plurality of guide posts 301; an injection molding tube 505 is connected to the top of the displacement plate 501, and an injection molding funnel 506 is connected to the top of the injection molding tube 505; an injection molding port 507 extending upward is formed through the bottom of the molding protrusion 502, and the injection molding port 507 is connected to the injection molding tube 505, and an L-shaped connecting plate 508 is fixed between the displacement plate 501 and the injection molding tube 505; two symmetrical built-in grooves 509 are formed inside the molding groove 304 at the top of the displacement plate 501; two symmetrical guide cross bars 510 are fixed to the inner wall of one of the built-in grooves 509 near the bottom, and two guide cross bars 510 are fixed to the inner wall of the built-in groove 509 near the bottom. A movable groove 511 is provided between the guide cross bars 510, a T-shaped slide plate 512 is slidably provided between the two guide cross bars 510, and two return springs 513 respectively sleeved and provided on the two guide cross bars 510 are fixed between the T-shaped slide plate 512 and the built-in groove 509; a positioning plate 514 is fixed on one side of the displacement plate 501, a U-shaped plate 515 is fixed on the top of the positioning plate 514, an L-shaped push-pull plate 516 is slidably provided on the inner wall of the U-shaped plate 515, a first hinge seat 517 is fixed on the top of the L-shaped push-pull plate 516, and a hinge arm 518 is hingedly provided inside the first hinge seat 517; a U-shaped vertical plate 519 is fixed on the outer top of the U-shaped plate 515, and a limiting groove 520 is provided on both inner side walls of the U-shaped vertical plate 519, and the two A second hinge seat 521 hingedly matched with the hinge arm 518 is slidably matched between the limit grooves 520, and two symmetrical elastic springs 522 are fixed between the second hinge seat 521 and the U-shaped vertical plate 519; a plurality of plug-in cylinders 405 respectively plugged and fixed with a plurality of guide columns 301 are fixed at the bottom of the top cover plate 401; a connecting horizontal plate 406 is fixed to the inner wall of the feed hole 402, and a conducting rod 407 slidably matched with the injection tube 505 is fixed at the bottom center of the connecting horizontal plate 406; a moving plate 523 slidably matched inside the moving groove 511 is fixed to one side of the T-shaped slide plate 512, and a through hole 524 is opened through the top center of the moving plate 523, and a circular cutting knife 525 is fixed to the inner wall of the through hole 524; demolding member 7 It includes a demoulding frame 701 that is slidably matched in the demoulding groove 503, and two rectangular grooves 702 are respectively slidably matched with the L-shaped connecting plate 508 and the L-shaped push-pull plate 516 on the top of the demoulding frame 701. Two symmetrical trapezoidal plates 703 are fixed on the top of the demoulding frame 701, and the first inclined groove 704 is penetrated on one side of the two trapezoidal plates 703; the displacement plate 501 is provided with guide grooves 526 on the opposite sides; the sliding member 6 includes two U-shaped sliding plates 601 that are respectively slidably matched in the two guide grooves 526, and the two U-shaped sliding plates 601 are fixed with rectangular slide plates 602 on the opposite sides, and the two rectangular slide plates 602 are penetrated on one side to respectively slide and match on the two first levers 404.A moving frame 604 is fixed between the two rectangular slides 602, a placement slot 605 is opened through the top of the moving frame 604, two symmetrical vertical baffles 606 are fixed at the bottom of the moving frame 604, and the second lever 607 that slides and fits inside the first inclined slot 704 is fixed on the opposite side of the two vertical baffles 606, and a gantry 608 is fixed on the top of the moving frame 604 above the placement slot 605, an extension rod 609 is fixed on the top of the gantry 608, a T-shaped vertical plate 610 is fixed at the bottom of the extension rod 609, and a downward pressing rod that fits with the articulated arm 518 is fixed at the bottom of the T-shaped vertical plate 610 611; Two limiting grooves 408 are formed through the top of the top cover plate 401 and are respectively slidably matched with the two rectangular slides 602; A mounting base plate 305 is fixed to the bottom of the guide columns 301, a fixing plate 306 is fixed to one side of the mounting base plate 305, a hydraulic telescopic cylinder 307 is fixed to the top of the fixing plate 306, and a connecting flange 308 fixedly connected to the bottom of the positioning plate 514 is fixed to the top of the hydraulic telescopic cylinder 307; Two symmetrical positioning base plates 309 are fixed between the guide columns 301, and threaded columns 310 are fixed to the top of the two positioning base plates 309 and are plugged and fixed to the lower base plate 302.;

[0049] The specific application of the first embodiment is as follows: during the production and molding of the fresh-keeping box cover (in the initial stage, the molding protrusion 502 is located inside the molding groove 304, and there is a cavity for molding between the two. In the initial state, the bottom of the demolding frame 701 is located inside the molding cavity formed by the molding protrusion 502 and the molding groove 304, and there is a certain distance between the bottom of the lower demolding frame 701 and the inner bottom of the molding groove 304, so as to play a certain top sealing role in the injection molding process of the fresh-keeping box cover, and prevent the plastic raw materials of the injection molding from overflowing during the injection molding process later), during the molding process of the fresh-keeping box cover, the raw materials of the fresh-keeping box cover in the molten state are injected into the injection funnel 506 from the feed hole 402 opened at the bottom center of the top cover plate 401, and enter the injection tube 505 through the injection funnel 506, and finally flow into the molding cavity formed by the molding protrusion 502 and the molding groove 304 from the injection port 507, so as to form the required fresh-keeping box cover; In the subsequent process of forming and demolding the fresh-keeping box cover, the hydraulic telescopic cylinder 307 is started to drive the positioning plate 514 fixed at the telescopic end of the hydraulic telescopic cylinder 307 to rise, so that the displacement plate 501 is synchronously raised on the peripheral side surfaces of the plurality of guide pillars 301. When the displacement plate 501 is synchronously raised on the peripheral side surfaces of the plurality of guide pillars 301, the two first levers 404 respectively slidably matched in the two second inclined grooves 603 slide synchronously, and thereby drive the two U-shaped sliding plates 601 respectively fixed on the back side surfaces of the two rectangular slide plates 602 to synchronously slide in the guide grooves 526 respectively opened on the opposite sides of the displacement plate 501, so that the two U-shaped sliding plates 601 are respectively close to one side of the positioning plate 514 in the two guide grooves 526. When the two U-shaped sliding plates 601 are respectively in the two guide grooves 526 toward one side of the positioning plate 514 When the two surfaces are close to each other, the second levers 607 fixed to the opposite sides of the two vertical baffles 606 slide synchronously in the two first inclined grooves 704, and provide a downward sliding force for the demoulding frame 701 fixedly connected to the bottom of the two trapezoidal plates 703, thereby driving the demoulding frame 701 to move downward in the demoulding groove 503 (in the process of the demoulding frame 701 moving downward in the demoulding groove 503, its displacement plate 501 and the structure arranged on the displacement plate 501 continue to rise under the action of the hydraulic telescopic cylinder 307), thereby pushing and cleaning the surface of the forming protrusion 502, while preventing the formed fresh-keeping box cover from adhering to the surface of the forming protrusion 502, and also scraping and cleaning the residual material adhering to the surface of the forming protrusion 502, so as to prevent the residual material adhering to the forming protrusion 502 from being cleaned in time during the subsequent molding process; In the above process of forming and demoulding the fresh-keeping box cover, as the displacement plate 501 and the structure arranged on the displacement plate 501 continue to rise under the action of the hydraulic telescopic cylinder 307, the articulated arm 518 articulated between the first articulated seat 517 and the second articulated seat 521 gradually approaches the peripheral side surface of the downward pressing rod 611 fixed to the bottom of the T-shaped vertical plate 610, thereby driving the articulated arm 518 to be articulated and pressed down and rotated between the first articulated seat 517 and the second articulated seat 521, so that the articulated arm 518 fixedly connected to the second articulated seat 521 is rotated. The two elastic springs 522 between the U-shaped vertical plate 519 and the L-shaped push-pull plate 516 are compressed synchronously, thereby providing a sliding force for the L-shaped push-pull plate 516 that is slidably fitted on the inner wall of the U-shaped plate 515, driving the L-shaped push-pull plate 516 to move closer to the outer peripheral side of the injection tube 505 on the inner wall of the U-shaped plate 515, so that one side of the L-shaped push-pull plate 516 gradually approaches one side of the T-shaped slide plate 512, thereby pushing the T-shaped slide plate 512 to move closer to the outer peripheral side of the injection tube 505, and thereby the fixed connection between the T-shaped slide plate 512 and the built-in groove 505 is tightened. The two return springs 513 between the two return springs 513 are compressed, so that the moving plate 523 fixed on one side of the T-shaped slide plate 512 is synchronously moved in the moving groove 511 toward the direction away from the outer peripheral side of the injection tube 505, and thereby the annular cutting knife 525 fixedly connected to the inner wall of the through hole 524 is synchronously moved toward the direction away from the outer peripheral side of the injection tube 505 until the annular cutting knife 525 completes cutting of the excess columnar residue (the overall length of the hinged arm 518 is greater than the sliding distance of the lower pressing rod 611 on it, ensuring that the lower pressing rod 611 is 11 will not slide away to the top of the hinged arm 518), under the elastic restoring force of the two restoring springs 513 and the two elastic springs 522, the through hole 524 opened on the movable plate 523 is driven to move in the opposite direction, and finally to be in a coaxial state with the injection tube 505, so as to avoid it from affecting the subsequent injection molding process, thereby cutting the excess columnar residue remaining in the injection tube 505, avoiding the residual columnar residue in the injection tube 505 from affecting the subsequent injection molding process of the fresh-keeping box cover, and improving the molding effect of the fresh-keeping box cover; The displacement plate 501 and the structure arranged on the displacement plate 501 continue to rise under the action of the extension and retraction of the hydraulic telescopic cylinder 307. After the columnar residue inside the injection tube 505 is cut, as the displacement plate 501 rises, the injection funnel 506 connected to the top of the injection tube 505 gradually approaches the conducting rod 407 fixed at the bottom center position of the connecting cross plate 406, so that the columnar residue adhered to the injection tube 505 is ejected through the sliding process of the conducting rod 407 inside the injection tube 505, so as to avoid the columnar residue remaining in the injection tube 505 affecting the subsequent injection molding process during the subsequent injection molding of the fresh-keeping box cover, and at the same time, it can also assist in the demolding operation of the fresh-keeping box cover adhered to the surface of the molding protrusion 502, thereby improving the injection molding effect of the fresh-keeping box cover.

[0050] For example 2, please refer to Figure 1-12 The second embodiment is improved on the basis of the first embodiment as follows. Specifically, a cooling cavity 311 is provided inside the lower mold 303, an outer side surface of the lower mold 303 is connected to a liquid outlet pipe 312 connected to the cooling cavity 311, a feeding pipe 313 connected to the cooling cavity 311 is connected to the center of the bottom of the lower mold 303, a piston cylinder 314 is connected to the bottom of the feeding pipe 313, a feeding pipe 313 is connected to the side surface of the feeding pipe 313, a piston rod 315 is slidably fitted inside the piston cylinder 314, and a piston rod 315 is slidably fitted inside the piston cylinder 314, and a feeding pipe 313 is connected to the outer side surface of the feeding pipe 313. A liquid inlet pipe 321 is provided, and a coolant storage tank is provided between the liquid inlet pipe 321 and the liquid outlet pipe 312 via a hose; two symmetrical guide vertical rods 316 are fixed on the top of the mounting base plate 305, a reciprocating plate 317 fixedly connected to the bottom of the piston rod 315 is slidably fitted between the two guide vertical rods 316, two reciprocating springs 318 respectively sleeved on the two guide vertical rods 316 are fixed between the reciprocating plate 317 and the mounting base plate 305, a driving motor 319 is fixed on the top of the mounting base plate 305, and a cam 320 is fixed on the output shaft of the driving motor 319.

[0051] The specific application of the second embodiment is as follows: during the injection molding process of the entire molding device, as the fresh-keeping box cover is being injection molded, the drive motor 319 is immediately started to drive the cam 320 fixed to the output shaft of the drive motor 319 to rotate, so that the cam 320 repeatedly contacts the bottom of the reciprocating plate 317, and in combination with the elastic force of the two reciprocating springs 318, the reciprocating plate 317 reciprocates up and down between the two guide vertical rods 316, thereby driving the piston rod 31 fixed at the top center of the reciprocating plate 317 to move up and down. The piston cylinder 314 reciprocates up and down inside to suck the coolant stored in the coolant storage tank, so that the coolant in the coolant storage tank passes through the liquid inlet pipe 321, the feed pipe 313, the cooling cavity 311, and the liquid outlet pipe 312 in sequence (the coolant storage tank is a prior art, not shown in the figure, and will not be described in detail here), and thus the injection molded fresh-keeping box cover is cooled before demoulding, so as to prevent the molded fresh-keeping box cover from adhering to the inside of the entire molding device during the later demoulding process.

[0052] Obviously, the above-described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0053] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0054] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein.

[0055] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

[0056] The above is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. An injection molding device for producing and processing a fresh-keeping box cover, comprising a lower mold assembly (1) characterized in that: The upper mold assembly (2) is slidably matched on the lower mold assembly (1); The lower mold assembly (1) comprises a lower mold component (3) and a top cover component (4) fixedly connected to the top of the lower mold component (3); The upper mold assembly (2) comprises an upper mold part (5), a sliding part (6) slidably fitted on the upper mold part (5), and a demoulding part (7) slidably fitted inside the upper mold part (5), wherein the demoulding part (7) is located below the sliding part (6), and the demoulding part (7) is slidably fitted with the sliding part (6); The lower mold component (3) comprises a plurality of guide columns (301), a lower base plate (302) is inserted and fixed between the plurality of guide columns (301), a lower mold (303) is fixed on the top of the lower base plate (302), and a molding groove (304) is provided on the top of the lower mold (303); The top cover member (4) comprises a top cover plate (401) inserted and fixed on the top of the plurality of guide pillars (301); a feed hole (402) is provided through the center of the bottom of the top cover plate (401); a vertical plate (403) is fixed to the bottom of the top cover plate (401) at a position offset from the center; and first levers (404) that are slidably matched with the sliding member (6) are fixed to the opposite sides of the vertical plate (403) near the bottom. The upper mold component (5) comprises a displacement plate (501) slidably engaged with a plurality of guide pillars (301), a molding protrusion (502) adapted to the molding groove (304) being fixed to the bottom of the displacement plate (501), and a demoulding groove (503) slidably engaged with the demoulding component (7) being provided through the top of the displacement plate (501) extending downward.

2. The injection molding equipment for producing and processing fresh-keeping box lids according to claim 1 is characterized in that: A plurality of guide holes (504) are formed through the top of the displacement plate (501), and the plurality of guide holes (504) are respectively slidably matched with the plurality of guide posts (301); The top of the displacement plate (501) is connected to an injection tube (505), the top of the injection tube (505) is connected to an injection funnel (506), the bottom of the molding protrusion (502) is penetrated by an injection port (507) extending upwards, the injection port (507) is connected to the injection tube (505), and an L-shaped connecting plate (508) is fixed between the displacement plate (501) and the injection tube (505).

3. The injection molding equipment for producing and processing fresh-keeping box lids according to claim 2 is characterized in that: The top of the displacement plate (501) is provided with two symmetrical built-in grooves (509) located inside the molding groove (304); Two symmetrical guide cross bars (510) are fixed on the inner wall of the built-in groove (509) near the bottom, and a movable groove (511) is provided on the inner wall of the built-in groove (509) near the bottom and between the two guide cross bars (510). A T-shaped slide plate (512) is slidably engaged between the two guide cross bars (510), and two return springs (513) respectively sleeved on the two guide cross bars (510) are fixed between the T-shaped slide plate (512) and the built-in groove (509).

4. The injection molding equipment for producing and processing fresh-keeping box lids according to claim 3 is characterized in that: A positioning plate (514) is fixed to one side of the displacement plate (501), a U-shaped plate (515) is fixed to the top of the positioning plate (514), an L-shaped push-pull plate (516) is slidably matched on the inner wall of the U-shaped plate (515), a first hinge seat (517) is fixed to the top of the L-shaped push-pull plate (516), and a hinge arm (518) is hingedly matched inside the first hinge seat (517); A U-shaped vertical plate (519) is fixed to the outer top of the U-shaped plate (515); the U-shaped vertical plate (519) is provided with limiting grooves (520) relative to the two inner side walls; a second hinge seat (521) hingedly matched with the hinge arm (518) is slidably engaged between the two limiting grooves (520); and two symmetrical elastic springs (522) are fixed between the second hinge seat (521) and the U-shaped vertical plate (519).

5. The injection molding equipment for producing and processing fresh-keeping box covers according to claim 4 is characterized in that: A plurality of plug-in cylinders (405) are fixed to the bottom of the top cover plate (401) and are respectively plugged and fixed to a plurality of guide pillars (301); A connecting transverse plate (406) is fixed to the inner wall of the feed hole (402), and a conducting rod (407) is fixed at the center of the bottom of the connecting transverse plate (406) and is slidably matched with the injection tube (505); A moving plate (523) is fixed on one side of the T-shaped slide plate (512) and is slidably fitted in the moving groove (511). A through hole (524) is provided through the center of the top of the moving plate (523). An annular cutting knife (525) is fixed on the inner wall of the through hole (524).

6. The injection molding equipment for producing and processing fresh-keeping box lids according to claim 5, characterized in that: The demoulding member (7) comprises a demoulding frame (701) which is slidably fitted in the demoulding groove (503); two rectangular grooves (702) are formed through the top of the demoulding frame (701) and are respectively slidably fitted with the L-shaped connecting plate (508) and the L-shaped push-pull plate (516); two symmetrical trapezoidal plates (703) are fixed to the top of the demoulding frame (701); and a first inclined groove (704) is formed through one side of each of the two trapezoidal plates (703).

7. The injection molding equipment for producing and processing fresh-keeping box lids according to claim 6, characterized in that: The displacement plate (501) is provided with guide grooves (526) on two opposite sides; The sliding member (6) comprises two U-shaped sliding plates (601) respectively slidably fitted in the two guide grooves (526), ​​a rectangular sliding plate (602) being fixed to opposite sides of the two U-shaped sliding plates (601), and a second inclined groove (603) respectively slidably fitted on the two first shifting rods (404) is penetrated through one side of the two rectangular sliding plates (602).

8. The injection molding equipment for producing and processing fresh-keeping box lids according to claim 7, characterized in that: A moving frame (604) is fixed between the two rectangular slides (602), a placement groove (605) is formed through the top of the moving frame (604), two symmetrical vertical baffles (606) are fixed to the bottom of the moving frame (604), and second levers (607) slidably engaged in the first inclined groove (704) are fixed to the opposite sides of the two vertical baffles (606), a gantry (608) is fixed to the top of the moving frame (604) above the placement groove (605), an extension rod (609) is fixed to the top of the gantry (608), a T-shaped vertical plate (610) is fixed to the bottom of the extension rod (609), and a downward pressing rod (611) that fits the hinged arm (518) is fixed to the bottom of the T-shaped vertical plate (610). The top of the top cover plate (401) is provided with two limiting grooves (408) which respectively slidably cooperate with the two rectangular slide plates (602).

9. The injection molding equipment for producing and processing fresh-keeping box lids according to claim 8, characterized in that: A mounting base plate (305) is fixed at the bottom of the plurality of guide columns (301), a fixing plate (306) is fixed at one side of the mounting base plate (305), a hydraulic telescopic cylinder (307) is fixed at the top of the fixing plate (306), and a connecting flange (308) fixedly connected to the bottom of the positioning plate (514) is fixed at the top of the hydraulic telescopic cylinder (307); Two symmetrical positioning base plates (309) are fixed between the plurality of guide columns (301), and threaded columns (310) that are plugged and fixed to the lower base plate (302) are fixed on the tops of the two positioning base plates (309).

10. The injection molding equipment for producing and processing fresh-keeping box covers according to claim 9, characterized in that: A cooling cavity (311) is provided inside the lower mold (303); an outer side surface of the lower mold (303) is connected to a liquid outlet pipe (312) connected to the cooling cavity (311); a feed pipe (313) connected to the cooling cavity (311) is connected to the center of the bottom of the lower mold (303); a piston cylinder (314) is connected to the bottom of the feed pipe (313); a feed pipe (313) is connected to the peripheral side surface of the feed pipe (313); a piston rod (315) is slidably fitted inside the piston cylinder (314); a liquid inlet pipe (321) is connected to the peripheral side surface of the feed pipe (313); a coolant storage tank is connected between the liquid inlet pipe (321) and the liquid outlet pipe (312) via a hose; Two symmetrical guide vertical rods (316) are fixed on the top of the installation base plate (305); a reciprocating plate (317) fixedly connected to the bottom of the piston rod (315) is slidably engaged between the two guide vertical rods (316); two reciprocating springs (318) respectively sleeved on the two guide vertical rods (316) are fixed between the reciprocating plate (317) and the installation base plate (305); a driving motor (319) is fixed on the top of the installation base plate (305); and a cam (320) is fixed to the output shaft of the driving motor (319).

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