KR100727822B1 - Mold device for manufacturing handheld pallets - Google Patents

Abstract

The present invention relates to an integrated hand car type pallet and a mold for manufacturing the pallet, wherein the hand car type pallet according to the present invention has a cross-sectional area between the center column of the upper surface of the rectangular body and the center column of four peripheral portions thereof. It is formed of a lattice reinforcement structure in which the directional ribs intersect, and the upper and lower parts and the column part form a lattice reinforcement structure as a whole. The mold apparatus for manufacturing a pallet according to the present invention is located in the upper part of the bottom surface of the well sperm passage as a part of the upper surface of the pallet, and has a cross-sectional area defined between the central pillar and the peripheral intermediate pillar, and the lattice shape in which the longitudinal and transverse ribs intersect. In order to form a reinforcing structure, the upper and lower discs, the upper and lower slide cores for forming the well sperm-shaped passage of the pallet in the middle portion of the upper and lower slides are installed to slide in all directions, the upper and lower cores , And a lattice-shaped part for forming ribs intersecting in the longitudinal and lateral directions is formed, and the lower plate is provided with an insert core for forming a lower surface opening of the pallet and a peripheral inclined surface. The hand car type pallet of the present invention has a cross-shaped area between the central pillar of the upper surface of the rectangular body and the central pillars of four peripheral portions formed in a lattice reinforcement structure in which longitudinal and transverse ribs intersect, thereby forming the upper and lower portions of the rectangular body. Since the surface is made of a lattice-shaped reinforcement structure as a whole, the overall mechanical uniformity is not uniform, and thus the upper surface of the pallet is not bent or crushed even when a heavy material is loaded. There is an advantage to this.

Description

Mold device for manufacturing integrated hand car type pallet {MOLD FOR MANUFACTURING SINGLE BODY TYPE HAND CAR TYPE PALLET}

1 to 5 show an integrated pallet according to the present invention,

1 is a perspective view of a pallet.

2 is a top view of a pallet.

3 is a bottom view of the pallet.

4 is a cross-sectional view taken along the line A-A of FIG.

5 is a partial plan view of FIG. 2.

6 and 7 are explanatory views of the use of the pallet according to the present invention.

8 to 18 is a view showing the configuration and operation of the mold for producing a pallet according to the present invention,

8 is an overall longitudinal cross-sectional view of the mold.

9 is an explanatory diagram of a product molding operation by a core;

10 is a plan view of an upper disc.

Figures 11 (a), (b) and (c) are partial plan views, longitudinal cross-sectional views and cross-sectional views showing an extract of one phase core;

12 is a plan view of the lower disc.

Figure 13 is a plan view showing the assembly form of the main slide core.

14 is a plan view showing the insert core portion;

15 and 16 are diagrams illustrating the operation of the insert core.

17 is an assembled perspective view of the insert core.

18 is an exploded perspective view of the insert core;

19 to 21 shows a conventional hand car type palette,

19 is a plan view of a pallet.

20 is a cross-sectional view taken along the line B-B in FIG. 19;

21 is a partial plan view of a pallet.

<Description of the symbols for the main parts of the drawings>

10: pallet 10a: rectangular body

11: well sperm passage 11a: side opening

11b: lower surface opening 11c: inclined surface

13; 13a, 13b, 13c: pillar portion 14: upper surface portion

14a: cross section 15: bottom part

101: cavity 110,130: upper and lower disc

120,140: Upper and lower core 135: Insert core insertion hole

137: slide groove 160,170: upper and lower fastening plate

200: molten resin supply member 310,320: long and short slide core

340: slide block 400: insert core

410: hydraulic cylinder 420: fastening plate

430: Slide connector 440,460: Slide guide rail

450: inner slider 452: edge portion

453,454: Rail Grooves

The present invention relates to a mold for manufacturing an integrated hand car type pallet, and in particular, a cross-shaped region between the central pillar of the upper surface of the rectangular body and the central pillar of four peripheral portions is formed by a lattice reinforcement structure in which longitudinal and transverse ribs intersect. The upper, lower, and columnar portions of the rectangular body form a lattice-reinforced structure as a whole, and the inner circumferential surface of each of the lower surface openings is formed so as to form inclined surfaces, except for corners, to increase the strength strength and extend the service life. It relates to a mold apparatus for manufacturing an integrated hand car type pallet.

In general, the hand car type pallet is formed of a unidirectional rib structure in which a part of the upper surface of the rectangular body is formed of a longitudinal rib or a unidirectional rib of a lateral rib, so that the mechanical strength is not uniform as a whole and partially weak. It was to shorten the service life.

19 to 21 show such a conventional hand car type pallet, FIG. 19 is a plan view of the pallet, FIG. 20 is a sectional view taken along the line BB of FIG. 19, and FIG. 21 is a partial plan view of the pallet. Is shown.

As shown in the drawing, in the conventional hand car type pallet 10, the rectangular main body 10a, when viewed from above, is formed with a passage 11 that forms a well sperm shape. Two side openings 11a constituting the inlet of 11 are respectively formed, and four lower surfaces exposed downwards at intersections where the longitudinal and transverse passages of the well sperm passage 11 meet at the lower portion of the rectangular body 10a. While the opening 11b is formed, the inner circumferential surface of the lower surface opening 11b is formed with the inclined surface 11c on the four sides except for the corner portion, and the inner circumferential surface of each side opening 11a is also formed with the inclined surface 11d.

Then, between the central portion, the corner portion and the corner portion of the rectangular body 10a, pillar portions 13; 13a, 13b, and 13c which integrally connect the upper surface portion 14 and the lower surface portion 15 are formed, and the rectangular body The top and bottom portions 14 and 15 of the well sperm passage 11, the side opening 11a, the bottom opening 11b and the columnar portion 13 are formed at the longitudinal and transverse ribs, respectively. It is formed by a plurality of lattice-shaped reinforcement structure, the interior of the intermediate pillar portion 13c between the central pillar portion 13a, the corner pillar portion 13b, and the corner pillar portion 13b also has a grid-like reinforcement structure. Formed.

Since the conventional pallet 10 is formed in a single rib structure in which the cross-shaped area 14b is formed of longitudinal or lateral ribs, respectively, the mechanical strength is lowered, and thus the rectangular body 10a is loaded as the heavy material is loaded for a long time. Bending and crushing occur, which shortens the service life.

In this way, the structure of the cross section of the upper surface of the handcar type pallet plays an important role in handling load and service life. Due to the difficulty in application, the cross-shaped region could not be formed into a lattice of longitudinal and transverse cross rib structures, but had to be formed into a single rib structure.

The present invention has been made in order to solve the above problems and defects as described above, the cross-shaped region between the center pillar of the upper surface of the rectangular body and the center pillar of the four peripheral portions of the grid, the longitudinal ribs cross The upper, lower and column portions of the rectangular body form a lattice reinforcement structure as a whole by forming a reinforcing structure, and the inner circumferential surface of each of the lower surface openings is formed so as to form inclined surfaces, except for corner portions, to increase strength. It is an object of the present invention to provide a mold apparatus for manufacturing an integrated hand car type pallet which can extend its service life.

In order to achieve the above object, the mold apparatus for manufacturing a pallet according to the present invention is fixed to the upper and lower fastening plate, the upper and lower discs, which are fastened to the injection machine to mold the hand car type pallet, the upper fastening plate In the injection mold for manufacturing a pallet, in which a molten resin supply member is assembled, and upper and lower discs and upper and lower cores are fixed, respectively, a part of the upper surface of the pallet is positioned above the bottom opening of the sperm passage. For forming a well-shaped passageway of the pallet in the middle of the upper and lower discs, so as to form a cross-sectional area defined between the upper and lower intermediate pillars as a lattice reinforcement structure in which longitudinal and horizontal ribs intersect. Wherein, the slide core is coupled to the slide block is installed so as to slide in all directions, the upper and lower cores, ribs that cross in the longitudinal, transverse direction A lattice-shaped molding part for forming a mold is formed, and the lower plate is formed by installing an insert core for forming a lower surface opening and a peripheral inclined surface of the pallet.

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The insert core has a hydraulic cylinder fixed to the insert core insertion hole formed in the lower plate via a fastening plate, a slide connector fixed to the upper end of the plunger of the hydraulic cylinder, and a left and right horizontal movement by lifting and lowering of the slide connector. In addition to the movement is configured to include an inner slider having an edge portion for forming the inclined surface of the lower opening.

Hereinafter, with reference to the accompanying drawings, the present invention will be described in detail as follows.

1 to 5 show an integrated pallet according to the present invention, in which FIG. 1 is a perspective view of the pallet, FIG. 2 is a plan view of the pallet, FIG. 3 is a bottom view of the pallet, and FIG. 4 is an AA line of FIG. A cross-sectional view is shown, and FIG. 5 shows a partial plan view of FIG. 2.

6 and 7 illustrate the use of the pallet according to the present invention. Referring first to FIGS. 6 and 7, the hand car type pallet 10 according to the present invention uses the hand car 50. Will be treated. In addition, the hand car 50 is provided with a handle portion 52 on one side of the main frame 51, a wheel leg 53 is provided below the main frame 51, the wheel at the lower end of the wheel leg 53 54 is provided.

When loading the conveyed object on the pallet 10 and using the hand car 50 to transfer the hand car 50 into the side opening 11a of the pallet 10 as shown in FIG. 7, FIG. As shown in Fig. 6, the main frame 51 is formed by protruding the wheel 54 of the hand car 50 through the lower opening 11b of the pallet 10 and extending the wheel leg 53 of the hand car 50. After contacting the upper side of the pallet 10, the hand car 50 is moved to convey the pallet 10.

Hereinafter, referring to FIGS. 1 to 5, the pallet 10 according to the present invention has a rectangular main body 10a formed with a passage 11 forming a well sperm when viewed from above. Two side openings 11a constituting the inlet of the well sperm passage 11 are formed, respectively, and the lower portion of the rectangular body 10a is downward at an intersection where the longitudinal and transverse passage portions of the well sperm passage 11 meet. Four exposed lower surface openings 11b are formed, and the inner circumferential surface of the lower surface opening 11b is formed as inclined surfaces 11c, except for corner portions, and the inner circumferential surface of each side opening 11a is also inclined surface 11d. Formed.

Then, between the central portion, the corner portion and the corner portion of the rectangular body 10a, pillar portions 13; 13a, 13b, and 13c which integrally connect the upper surface portion 14 and the lower surface portion 15 are formed, and the rectangular body The top and bottom portions 14 and 15 of the well sperm passage 11, the side opening 11a, the bottom opening 11b and the columnar portion 13 are formed at the longitudinal and transverse ribs, respectively. It is formed by a plurality of lattice-shaped reinforcement structure, the interior of the intermediate pillar portion 13c between the central pillar portion 13a, the corner pillar portion 13b, and the corner pillar portion 13b also has a grid-like reinforcement structure. Formed.

Here, when comparing the pallet of the present invention shown in Figs. 1 to 5 and the conventional pallet shown in Figs. 19 to 21, the pallet 10 according to the present invention has a central column portion ( Although the cross-shaped area 14a between 13a) and the four central pillars 13c is formed in a lattice reinforcement structure in which longitudinal and lateral ribs intersect, the conventional pallet 10 has a cross-shaped area 14b. Each is formed in a single rib structure with longitudinal or transverse ribs.

If the cross-shaped region 14a of the upper surface portion 14 that forms the rectangular body 10a has a lattice reinforcement structure in which longitudinal and transverse ribs are crossed as in the present invention, the heavy goods are transported while the pallet 10 is used for a long time. Even when loading, since the upper surface portion 14 of the pallet 10 is not bent or crushed, it can be used stably for a long time.

However, when the cross-sectional area 14b of the upper surface portion 14 constituting the rectangular body 10a has a single rib structure by unidirectional ribs, as in the conventional pallet, the mechanical strength strength is lowered and thus the heavy weight is loaded for a long time. Bending and crushing occur in the rectangular body 10a, which shortens the service life.

Therefore, the structure of the cross-shaped areas 14a and 14b of the upper surface portion 14 in the pallet is an important part for determining the size of the cargo that can be handled and the service life.

In this way, the structure of the cross section of the upper surface of the handcar type pallet plays an important role in handling load and service life. Due to the difficulty in application, the cross-shaped region could not be formed into a lattice of longitudinal and transverse cross rib structures, but had to be formed into a single rib structure.

8 to 18 is a view showing the configuration and operation of the mold for producing a pallet according to the present invention, Figure 8 is a full longitudinal cross-sectional view of the mold, Figure 9 is a diagram illustrating the product forming action by the core, Fig. 10 shows a plan view of the upper disc, and Figs. 11 (a), (b) and (c) show a partial plan view, a longitudinal cross-sectional view and a cross-sectional view showing one phase core, respectively, and Fig. 12 shows a plan view of the lower disc, respectively. .

13 is a plan view showing the assembly form of the main slide core, FIG. 14 is a plan view showing the insert core portion, FIGS. 15 and 16 are explanatory views of the operation of the insert core, and FIG. 17 is an insert. Assembled perspective view of the core, Figure 18 shows an exploded perspective view of the insert core, respectively.

 As shown in the drawing, in the mold 100 for manufacturing a pallet according to the present invention, the upper core 120 is fixed to the lower part of the upper disc 110, and the lower core 140 is fixed to the upper part of the lower disc 130. The upper and lower discs 110 and 130 are coupled to the upper and lower fastening plates 160 and 170 which are fastened to the injection machine, respectively.

In addition, the upper fastening plate 160 is provided with a molten resin supply member 200 including a sprue 201, a runner 202, and a gate 203 for supplying and injecting molten resin.

The lower fastening plate 170 is provided with an insert core 400 which can form a hand car hole, that is, a lower surface opening 11b and a slope section, that is, a peripheral inclined surface 11c of the lower surface opening 11b, below the product. In addition, the long slide core 310 and the short slide core 320 of the main slide core 300 to form a product portion between the upper core 120 and the lower core 140 slide left and right on the lower disc 130. When coupled to each other, the long and short slide cores 310 and 320 are operated by the hydraulic cylinder 330 and the angular pin 180.

The lower plate 130 and the lower fastening plate 170 is assembled with a mill plate n for pushing the mill pin 151 for taking out the product from the mold 100.

8, 10, and 11 (a), (b), and (c), the upper disc 110 has pockets 111 formed in a central portion thereof and is divided into 21 upper cores 120. ) Is assembled with the block 112 and the bolt 113 in the pocket (111). 16 angular pin holes 114 are provided on the outside of the pocket 111 to assist the operation of the long and short slide cores 310 and 320, and the guide pins for guiding the precise fastening of the mold 100 are assembled. Four guide pin holes 115 are processed.

As shown in FIGS. 8 and 12, the lower disc 130 is assembled with a block 132 and a bolt 133 in which a lower core 140 is divided into 21 parts in the same manner as the upper disc 110. Lose.

In addition, four insert core insertion holes 135 into which the hand car wheel hole of the pallet 10, that is, the lower surface opening 11b and the slope section, that is, the insert core 400 for forming the inclined surface 11c are inserted, are processed. And right next to the insert core insertion hole 135 is a rail installation groove 136 is assembled is assembled a slide guide rail 460 that can operate the inner slider 450, the edge of the lower plate 130 4 In the place, slide grooves 137, which can be operated by sliding the long and short slide cores 310 and 320 to the slide block 340, are processed. The long and short slide cores 310 and 320 have both long and short slide cores when the hydraulic cylinder installation grooves 138 on which the hydraulic cylinders 330 can be mounted are processed on both sides of the lower disc 130. 310, 320 and the hydraulic cylinder 330 is connected to enable operation.

In addition, in the lower plate 130, the mill pin 151, which can be taken out after forming the pallet 10, is formed by uniformly distributing the mill pin holes 130a on the entire surface, and the guide pin holes 130b and the return at four corners. The pinhole 130c is formed.

As shown in FIGS. 14 to 18, the insert core 400 has an inner slider on the slide guide rail 440 on which the slide guide rail 440 is assembled and assembled by bolts on the slope of the slide connector 430. The rail groove 453 of the 450 is assembled and the inner slider 450 is assembled with the rail rail 454 of the lower part to the slide guide rail 460 assembled to the lower disc 130, and the slide connector 430 4 In place, the guide pin 470 is assembled for the correct lifting movement of the slide connector 430.

In addition, an edge portion 452 is formed on the slide connector 430 to process the inclined surface 11c of the lower surface opening 11b above the intermediate portion 451.

In addition, the hydraulic cylinder 410 is assembled by a bolt in the assembly hole 431 processed at the center of the slide connector 430, and the hydraulic cylinder 410 is connected to the fastening plate 420 and the bolt on the lower plate 130 again. It is assembled by a vertical movement.

The long and short slide cores 310 and 320 are assembled on the slide block 340 as shown in FIG. 13, and the slide block 340 is slidably coupled to the lower plate 130. The two hydraulic cylinders 330 and 331 having different working distances are connected to the slide block 340 in a state where the hydraulic cylinders 330 and 331 are attached to the lower plate 130 to operate the long and short slide cores 310 and 320.

Referring to the operation of the mold apparatus for producing a pallet according to the present invention as described above are as follows.

When the molten resin is injected through the nozzle of the injection molding machine in a state where all the molds are formed, it is sprayed onto the sprue 201 of the mold and the shape of the product, ie, the pallet 10, is formed through the gate 203 along the runner 202. The cavity 101 is filled, and the pallet 10 is formed through a predetermined cooling time.

As the upper and lower portions of the mold 100 are coupled, the insert core 400 moves along the rails 460 and 440 on which the inner slider 450 is assembled as the slide connector 430 moves forward when the hydraulic cylinder 410 is advanced. , The inner slider 450 opens horizontally, and the inner slider 450 abuts against the long and short slide cores 310 and 320 to form an opening 11b of the lower surface of the pallet 10 and at the edge of the inner slider 450. By 452, the hand car slope surface of the pallet 10, ie, the inclined surface 11c of the lower surface opening 11b of the pallet 10, is formed. In this state, the resin is injected.

When the pallet 10 is formed, the hydraulic cylinder 410 of the insert core 400 operates to retract the inner slider 450 from the lower surface opening 11b of the pallet 10 to detach the upper core 120. ) And the lower core 140 are deformed, and the long slide core 310 and the short slide core 320 are primarily operated by the angular pins 180 and are extended by two kinds of hydraulic cylinders 330 and 331 having different working distances. However, both the slide cores 310 and 320 are separated.

After injection is made to the mold 100 and a certain cooling time has elapsed, when the pallet 10 is taken out, the slide connector 430 is retracted by the hydraulic cylinder 410 and the inner slider 450 is pulled to assemble the rail. Along the 460 and 440, the left and right sides are retracted so that the undercut is terminated and the product can be taken out.

When the long and short slide cores 310 and 320 of the mold 100 are all enclosed, the pallet 10 having a shape is attached to the lower core 140 and the mill pin 150 is operated by the injection molding machine. (151) Push the pallet 10 is completely taken out from the mold (100).

When the pallet 10 is ejected from the mold 100, the hydraulic cylinder 410 of the insert core 400 is operated to open the inner slider 450 to form a product again, and the long and short slide cores 310, ( 320 is closed and the upper and lower portions of the mold 100 are closed.

As described above, the hand car type pallet according to the present invention has a rectangular cross-sectional area between the central pillar of the top surface of the rectangular body and the central pillars of four peripheral portions formed in a lattice reinforcement structure in which longitudinal and horizontal ribs intersect. Since the upper and lower surfaces of the main body form a lattice-shaped reinforcement structure as a whole, the overall mechanical uniformity is not uniform, but the overall uniformity of the pallet does not bend or crushed even when a heavy material is loaded. There is an advantage that can be used stably for a long time.

Claims (5)

delete delete The upper and lower discs 110 and 130 are fixed to the upper and lower fastening plates 160 and 170 which are fastened to the injection machine to mold the integrated hand car type pallet 10, and the upper fastening plate 160 is fixed. In the molten resin supply member 200 is assembled to the upper and lower discs 110 and 130, the upper and lower cores 120 and 140 in the injection mold for manufacturing a pallet, respectively, A cross-shaped region located above the bottom opening 11b of the well sperm passage 11 as a part of the upper surface portion 14 of the pallet 10 and defined between the central pillar portion 13a and the peripheral intermediate pillar portion 13c. In order to form 14a and 14b into a lattice-shaped reinforcement structure in which longitudinal and lateral ribs intersect, a well sperm passage of the pallet 10 at an intermediate portion of the upper and lower discs 110 and 130 ( 11, the long and short slide cores 310 and 320 for forming are coupled to the slide block 340 is installed to slide in all directions, The upper and lower cores 120 and 140 are provided with a lattice-shaped molded part for forming ribs that cross in the longitudinal and lateral directions. The lower plate 130 is provided with an insert core 400 for forming the lower surface opening 11b and the peripheral inclined surface 11c of the pallet 10, The insert core 400, A hydraulic cylinder 410 fixed to the insert core insertion hole 135 formed in the lower plate 130 via a fastening plate 420; A slide connector 430 fixed to an upper end of the plunger of the hydraulic cylinder 410; An inner slider 450 provided with an edge portion 452 for horizontally moving left and right by lifting and lowering of the slide connector 430 and forming an inclined surface 11c of the bottom opening 11b. Mold apparatus for producing a pallet, characterized in that configured. The slide guide rails 460 are fixed to the lower plate 130 in two directions, and the slide guide rails 440 are fixed to four sides of the slide connector 430, respectively. Inner slider (450) The mold apparatus for manufacturing a pallet, characterized in that the guide rails (440), 460 is slidably coupled to the rail groove (453) of the inner side and the rail groove (454) of the lower surface. The slide block 340 is slidably coupled to the slide grooves 137 formed on the lower plate 130 in all directions, and the slide blocks 340 have long and short slide cores 310. , 320 is fixed to each one mold apparatus for producing a pallet, characterized in that configured to be assembled in a well sperm inside the cavity 101 for forming a rectangular body (10a).

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