Rope and plastic package forming mold

Abstract

The utility model relates to the technical field of molds, and discloses a rope and plastic packaging and forming mold which comprises an upper mold, an injection molding inner mold, a lower mold and a rope fixing and adjusting structure, the upper mold and the lower mold form a mold cavity, and the injection molding inner mold is installed in the mold cavity. The injection molding inner mold is provided with an injection molding runner, letter molds, connecting piece molds, rope guide holes, rope limiting holes and rope placing holes, every two adjacent letter molds are communicated through the injection molding runner, the two ends of each letter mold are communicated with the middle of the corresponding connecting piece mold, and the two ends of each connecting piece mold are communicated with the rope placing holes through the rope guide holes; the rope fixing and adjusting structures are installed on the two sides of the lower die. According to the utility model, the soft rope can be accurately positioned and is not easy to displace, the rope is not easy to bend or deform under the action of high-pressure glue solution, the sling can be formed at one time, the reverse pulling capability of the sling is strong, the mold is simple in structure, the steps can be simplified, and the production cost can be reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of moulds, in particular to a mould for forming a rope and plastic packaging. Background Art

[0002] In the prior art for forming a rope buckle, usually one end of the rope is first inserted into the cavity, and then high-pressure injection molding is carried out to form the rope buckle. However, the injection end of the rope inserted into the cavity is prone to bending or deformation under the action of high-pressure glue, so this injection molding method in the prior art is only suitable for ropes with relatively high hardness. In the prior art when forming a semi-finished rope buckle, the injection end of the rope is placed against the flat wall surface of the upper mold, and further cooperates with the high-pressure glue sprayed from the injection gate arranged on the lower mold to position the injection end of the rope. But this method is prone to the phenomenon of the rope running out of position because it cannot be accurately positioned and because the whole rope is filled with glue; and when the semi-finished rope buckle is formed by the first injection molding, the part of the rope attached to the wall surface will have an unstable exposed phenomenon due to no injection of glue, or a very thin layer of glue is coated on the surface or the glue coating is not solid, and the reverse pulling ability of the formed rope buckle is weak. Content of the Utility Model

[0003] The purpose of the utility model is to overcome the above-mentioned deficiencies in the prior art and provide a mould for forming a rope and plastic packaging.

[0004] The purpose of the utility model is achieved by the following technical solutions: A mould for forming a rope and plastic packaging includes an upper mold, an injection inner mold, a lower mold and a rope fixing and adjusting structure. The upper mold and the lower mold form a mold cavity, the injection inner mold is installed in the mold cavity, the injection inner mold is provided with an injection runner, a letter mold, a connecting piece mold, a rope guiding hole, a rope limiting hole and a rope placing hole. Two adjacent letter molds are communicated through the injection runner, both ends of the letter mold are respectively communicated with the middle part of the connecting piece mold, both ends of the connecting piece mold are respectively communicated with the rope placing hole through the rope guiding hole, the rope fixing and adjusting structure is installed on both sides of the lower mold, the rope fixing and adjusting structure is provided with a rope, and both ends of the rope sequentially pass through the rope placing hole, the rope limiting hole, the rope guiding hole and the connecting piece mold.

[0005] More preferably, the rope fixing and adjusting structure includes a fixing frame, a rope fixing shaft, an adjusting plate, a fixing screw and an adjusting screw. One side of the fixing frame is installed on both sides of the lower mold through bolts, the adjusting plate is installed on the other side of the fixing frame, the first adjusting screw is installed on the adjusting plate through threads and connected with the rope fixing shaft, and the middle part of the rope is installed on the rope fixing shaft through the fixing screw.

[0006] A better option is that the injection molding inner mold includes an upper injection molding inner mold and a lower injection molding inner mold. The upper injection molding inner mold is installed on the upper mold, and the lower injection molding inner mold is installed on the lower mold. The upper injection molding inner mold and the lower injection molding inner mold form the injection molding runner, the letter mold, the connecting piece mold, the rope limiting hole, the rope guiding hole, and the rope placement hole.

[0007] A better option is that the rope limiting hole includes a pressing block and a rope fixing groove. The rope is sleeved in the rope fixing groove, the pressing block is embedded in the rope fixing groove, and the pressing block presses the rope.

[0008] A better option is that it further includes a rope positioning rod. The rope positioning rod is installed in the rope placement hole, and the rope positioning rod limits the rope.

[0009] A better option is that the inner diameter of the rope limiting hole is smaller than the outer diameter of the rope.

[0010] A better option is that the cross-section of the rope limiting hole in the horizontal direction is an elliptical structure.

[0011] The utility model has the following advantages and beneficial effects compared with the prior art:

[0012] Through the upper mold, the injection molding inner mold, the lower mold and the rope fixing and adjusting structure, the utility model can accurately position a soft rope, which is not easy to displace, and is not easy to bend or deform under the action of high-pressure glue. The hanging rope can be formed at one time, and the reverse pulling ability of the hanging rope is strong. The mold structure is simple, which can simplify the steps and reduce the production cost. Description of the Drawings

[0013] Figure 1 is a schematic diagram of a mold for forming a rope and a plastic package of the utility model;

[0014] Figure 2 is a top view schematic diagram of a mold for forming a rope and a plastic package of the utility model;

[0015] Figure 3 is a schematic diagram of the lower mold and the lower injection molding inner mold of a mold for forming a rope and a plastic package of the utility model;

[0016] Figure 4 is a schematic diagram of the lower injection molding inner mold of a mold for forming a rope and a plastic package of the utility model;

[0017] Figure 5 is Figure 4 a partial enlarged view schematic diagram at A;

[0018] Figure 6 is a schematic diagram of the upper mold and the upper injection molding inner mold of a mold for forming a rope and a plastic package of the utility model;

[0019] Figure 7 This is a schematic diagram of the upper inner injection mold of a rope and plastic packaging forming mold of the present utility model;

[0020] Figure 8 is Figure 7 a partial enlarged view at B;

[0021] Figure 9 This is a schematic diagram of the injection mold of a rope and plastic packaging forming mold of the present utility model;

[0022] Figure 10 is Figure 9 a sectional view at C;

[0023] Figure 11 is Figure 10 a partial enlarged view at D;

[0024] Figure 12 This is a schematic diagram of a rope fixing and adjusting structure of a rope and plastic packaging forming mold of the present utility model;

[0025] Markings of each component in the drawings: 1 - outer mold; 11 - upper mold; 12 - lower mold; 2 - injection inner mold; 21 - upper injection inner mold; 211 - upper half of the runner; 212 - upper letter mold; 213 - upper connecting part mold; 214 - pressing block; 215 - upper rope guiding groove; 216 - upper rope placing groove; 217 - upper mold limiting boss; 22 - lower injection inner mold; 221 - lower half of the runner; 222 - lower letter mold; 223 - lower connecting part mold; 224 - rope fixing groove; 225 - rope guiding groove; 226 - rope placing groove; 227 - lower mold limiting groove; 228 - rope positioning rod; 23 - rope limiting hole; 3 - rope fixing and adjusting structure; 301 - fixing frame; 302 - rope fixing shaft; 303 - adjusting screw; 304 - fixing screw; 4 - hanging rope; 401 - rope; 402 - plastic letter; 403 - plastic connecting part. Detailed implementation manners

[0026] The utility model purpose of the present utility model will be further described in detail below in conjunction with the drawings and specific embodiments. The embodiments cannot be elaborated one by one here, but the implementation manners of the present utility model are not limited to the following embodiments.

[0027] Such as Figure 1 and 2As shown in the figure, a rope and plastic packaging forming mold includes an upper mold 11, an injection inner mold 2, a lower mold 12, and two rope fixing and adjusting structures 3. The injection inner mold 2 includes an upper injection inner mold 21 and a lower injection inner mold 22. The upper injection inner mold 21 is installed in the middle of the bottom of the upper mold 11, and the lower injection inner mold 22 is installed in the middle of the top of the lower mold 12. The upper injection inner mold 21 and the lower injection inner mold 22 correspond to each other up and down. The two rope fixing and adjusting structures 3 are respectively installed on both sides of the lower mold 12. The two ends of the rope 401 are bonded together by heat melting. The two ends of the rope 401 are installed on the lower injection inner mold 22, and the middle of the rope 401 is installed on the rope fixing and adjusting structure 3. The upper mold 11 and the lower mold 12 are both of the prior art and are used to drive the opening and closing of the injection inner mold 2 and for injection molding. The injection inner mold 2 is used for the injection molding of plastic letters 402 and plastic connectors 403. The rope fixing and adjusting structure 3 is used to adjust the tension of the rope 401.

[0028] Each hanging rope 4 includes a rope 401, a plastic letter 402, and two plastic connectors 403. The two ends of the rope 401 are connected to the two ends of the plastic connector 403, and the middle of the plastic connector 403 is connected to the front and rear ends of the plastic letter 402.

[0029] As Figures 3 - 5 shown in the figure, the lower injection inner mold 22 includes a lower half of the runner 221, two lower letter molds 222, four lower connector molds 223, eight rope fixing grooves 224, eight rope guiding grooves 225, six rope placement grooves 226, four lower mold limiting grooves 227, and eight rope positioning rods 228. One end of the lower half of the runner 221 communicates with the left end of the lower injection inner mold 22, and the other end of the lower half of the runner 221 communicates with the two lower letter molds 222 in sequence and then communicates with the right end of the lower injection inner mold 22. The front and rear ends of the two lower letter molds 222 communicate with the middle parts of the four lower connector molds 223 respectively. The left and right ends of the four lower connector molds 223 communicate with one end of the eight rope fixing grooves 224 through the eight rope guiding grooves 225 respectively. The other end of the eight rope guiding grooves 225 communicates with one end of the six rope placement grooves 226. The other end of the six rope placement grooves 226 communicates with the front and rear sides of the lower injection inner mold 22. The four lower mold limiting grooves 227 are located at the four corners of the lower injection inner mold 22.

[0030] As Figures 6 - 8As shown in the figure, the upper inner injection mold 21 includes the upper half of the runner 211, two upper letter molds 212, four upper connecting-piece molds 213, eight pressing blocks 214, eight upper rope guiding grooves 215, six upper rope placing grooves 216, and four upper mold limiting bosses 217. The two upper letter molds 212 are arranged in the middle of the lower part of the upper inner injection mold 21, and the two upper letter molds 212 are connected through the upper half of the runner 211. The upper and lower ends of the upper letter molds 212 are respectively connected to the middle parts of the four upper connecting-piece molds 213. The two ends of the four upper connecting-piece molds 213 are respectively connected to one ends of the eight upper rope guiding grooves 215 through eight rope limiting holes 23. The other ends of the eight upper rope guiding grooves 215 are respectively connected to one ends of the six upper rope placing grooves 216. The six upper rope placing grooves 216 are respectively connected to the front and rear ends of the upper inner injection mold 21. Positioning holes for the rope positioning rods 228 are provided on the six upper rope placing grooves 216, a total of eight. The four upper mold limiting bosses 217 are arranged at the four corners of the upper inner injection mold 21.

[0031] The lower half of the runner 221 and the upper half of the runner 211 form the injection runner, which is used to guide the molten plastic liquid into the font mold and the connecting-piece mold. The lower letter mold 222 and the upper letter mold 212 form the letter mold, which is used to form the model of the plastic letter 402. The lower connecting-piece mold 223 and the upper connecting-piece mold 213 form the connecting-piece mold, which is used to form the model of the plastic connecting piece 403. The rope fixing groove 224 and the pressing block 214 form the rope limiting hole 23, which clamps the two ends of the rope 401 to prevent loosening and prevent the molten plastic liquid from flowing out. The rope guiding groove 225 and the upper rope guiding groove 215 form the rope guiding hole, which is used for the rope 401 to pass through. The rope placing groove 226 and the upper rope placing groove 216 form the rope placing hole, which is used for installing the rope positioning rod 228 and the rope 401 to pass through. The lower mold limiting groove 227 and the upper mold limiting boss 217 cooperate with each other to realize the positioning of the upper inner injection mold 21 and the lower inner injection mold 22. The rope positioning rod 228 is used to position the two ends of the four ropes 401.

[0032] As Figures 9 - 11 shown in the figure, the rope limiting hole 23 includes the rope fixing groove 224 and the pressing block 214. The pressing block 214 of the upper inner injection mold 21 is pressed into the rope fixing groove 224 of the lower inner injection mold 22. The inner diameter of the rope limiting hole 23 is smaller than the outer diameter of the rope 401 in the relaxed state. The rope 401 is tightly fixed in the rope limiting hole 23 by the rope limiting hole 23, and the elastic rope 401 cannot easily break away from the rope limiting hole 23. The cross section of the rope limiting hole 23 in the horizontal direction is oval, and the size of the rope limiting hole 23 is 1.6*2.2mm.

[0033] As Figure 12As shown in the figure, each rope fixing and adjusting structure 3 includes a fixing frame 301, two rope fixing shafts 302, an adjusting plate 305, two fixing screws 304 and four adjusting screws 303. The fixing frame 301 is installed on the front and rear sides of the lower die 12 by bolts, and the adjusting plate 305 is installed on the side of the fixing frame 301 away from the lower die 12. The four adjusting screws 303 are installed on the adjusting plate 305 by threads. The end parts of the four adjusting screws 303 are respectively connected to the two rope fixing shafts 302. The middle parts of the two ropes 401 are installed on the two rope fixing shafts 302 by the two fixing screws 304.

[0034] The fixing frame 301 functions as a bracket. The rope fixing shaft 302 is used to fix the middle part of the rope 401. The cooperation of the adjusting plate and the adjusting screws 303 realizes the position adjustment of the rope fixing shaft 302, thereby controlling the tightness of the rope 401. The fixing screw 304 is used to fix the middle part of the rope 401 on the rope fixing shaft 302.

[0035] A description of the usage process of a rope and a plastic packaging forming mold: First, both ends of the four ropes 401 are connected by heat melting. The upper die 11 and the lower die 12 are in an open state, that is, the injection upper inner die 21 and the injection lower inner die 22 are in a separated state. Both ends of the four ropes 401 are placed into the connecting piece lower die 223. Both ends of the four ropes 401 sequentially pass through the rope fixing groove 224, the rope guiding groove 225 and the rope placing groove 226 and then protrude out of the injection lower inner die 22. The middle part of the rope 401 is fixed on the rope fixing shaft 302 by the fixing screw 304. Turn the adjusting screw 303. The adjusting screw 303 moves relative to the adjusting plate, and the rope fixing shaft 302 moves relative to the adjusting plate, thereby pulling the middle part of the rope 401 backward or forward to adjust the tightness of the rope 401. When the tightness of the rope 401 is adjusted to an appropriate state, the upper die 11 and the lower die 12 are closed, and the injection upper inner die 21 and the injection lower inner die 22 are closed to form the injection inner die 2. An injection runner, a letter mold, a connecting piece mold, a rope guiding hole and a rope placing hole are formed in the injection inner die 2. Through the upper die 11 injecting into the injection inner die 2, the molten plastic sequentially flows into the letter mold and the connecting piece mold to form the plastic letter 402 and the material connecting piece 403. When the molding is cooled, the upper die 11 drives the injection upper inner die 21 to separate from the injection lower inner die 22, and the pull rope 4 is taken out of the injection lower inner die 22.

[0036] The above specific implementation manners are the preferred embodiments of the present invention and cannot limit the present invention. Any other changes or other equivalent replacement methods made without departing from the technical solution of the present invention are included in the protection scope of the present invention.

Claims

1. A rope and plastic packaging forming mold, characterized in that: It includes an upper mold, an injection inner mold, a lower mold and a rope fixing and adjusting structure, the upper mold and the lower mold form a mold cavity, the injection inner mold is installed in the mold cavity, the injection inner mold is provided with an injection runner, a letter mold, a connector mold, a rope guide hole, a rope limiting hole and a rope placement hole, two adjacent letter molds are connected through the injection runner, the two ends of the letter mold are respectively connected with the middle of the connector mold, the two ends of the connector mold are respectively connected with the rope placement hole through the rope guide holes, the rope fixing and adjusting structure is installed on both sides of the lower mold, the rope fixing and adjusting structure is provided with a rope, and the two ends of the rope pass through the rope placement hole, the rope limiting hole, the rope guide hole and the connector mold in sequence.

2. A rope and plastic packaging forming mold according to claim 1, characterized in that: The rope fixing and adjusting structure includes a fixing frame, a rope fixing shaft, an adjusting plate, a fixing screw and an adjusting screw. One side of the fixing frame is installed on both sides of the lower mold by bolts, and the adjusting plate is installed on the other side of the fixing frame. The adjusting screw is installed on the adjusting plate by threads and is connected to the rope fixing shaft. The middle part of the rope is installed on the rope fixing shaft by a fixing screw.

3. The rope and plastic packaging forming mold according to claim 1, characterized in that: The injection inner mold includes an injection upper inner mold and an injection lower inner mold, the injection upper inner mold is installed on the upper mold, the injection lower inner mold is installed on the lower mold, and the injection upper inner mold and the injection lower inner mold constitute the injection runner, the letter mold, the connector mold, the rope limiting hole, the rope guide hole and the rope placement hole.

4. The rope and plastic packaging forming mold according to claim 1, characterized in that: The rope limiting hole comprises a top pressing block and a rope fixing groove, the rope is inserted into the rope fixing groove, the top pressing block is embedded in the rope fixing groove, and the top pressing block presses the rope.

5. The rope and plastic packaging forming mold according to claim 3, characterized in that: It also includes a rope positioning rod, which is installed in the rope placement hole and limits the rope.

6. The rope and plastic packaging forming mold according to claim 1, characterized in that: The inner diameter of the rope limiting hole is smaller than the outer diameter of the rope.

7. A rope and plastic packaging forming mold according to claim 6, characterized in that: The transverse cross section of the rope limiting hole is an elliptical structure.

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