Mold with hanging cloth tight attaching function

Abstract

The invention discloses a mold with a hanging cloth tight fitting function, the mold comprises a front mold, a rear mold, an ejector plate and a bottom plate, the ejector plate and the bottom plate are sequentially arranged below the rear mold, the front mold and the rear mold can complete mold assembly, the rear mold is a mold core side, and the front mold is a mold cavity side. An injection molding mold core is arranged on the rear mold; a plurality of groups of cloth pressing elastic blocks are arranged beside the injection molding mold core; correspondingly, a plurality of cloth hanging needles are fixedly mounted on the front mold; the cloth pressing elastic block can be in contact with the front mold prior to the rear mold in the mold closing process, and clamping and attaching of embedded cloth are completed. The mold is simple in structure and reasonable in arrangement, compared with an existing mold, the stroke of the cloth pressing block is increased, the cloth pressing block can be attached to hanging cloth before the rear mold is attached, the cloth pressing block is matched with a cloth hanging needle to avoid the problems of deformation, wrinkles, displacement and the like, then the cloth can be better attached to an injection product through dredging of the cloth pressing block, and the production efficiency is improved. The quality of injection-molded products is improved, the production cost is saved, and the production efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of injection moulding, and in particular to a mould with a hanging cloth tightly fitting function. Background Art

[0002] The injection molding process refers to the process of making molten raw materials into products of a certain shape through operations such as pressurization, injection, cooling, and separation. There are many types of injection molded products, including pure plastic products with simpler processes and mold structures; there are also products with inserts with more complex processes and mold structures, and mesh is the most common type of insert. In particular, there are a large number of injection molded parts in automobiles, some of which have inserts to meet the use requirements. For example, the airbag bracket of the instrument panel needs to be embedded with a layer of non-woven fabric on the surface of the product during the injection molding process. In response to this injection molding operation requirement, the traditional injection molding process only hangs the fabric by setting a hanging needle, and then closes the mold for injection molding; but since the area of ​​fabric embedded in some existing products is large, resulting in an increase in weight, if it is only hung by hanging needles, it is easy to sag and deform, or even cause fabric displacement, forming wrinkles, affecting the injection molding effect of the final product, and thus affecting production efficiency. Summary of the invention

[0003] The purpose of the present invention is to solve the shortcomings of the above-mentioned prior art, prevent the embedded cloth from wrinkling and deforming, and provide a mold with the function of tightly fitting the hanging cloth.

[0004] In order to solve the above technical problems, the technical solution adopted by the present invention is: a mold with a cloth-hanging and tight-fitting function, comprising a front mold, a rear mold, an ejector plate and a bottom plate, wherein the ejector plate and the bottom plate are sequentially arranged below the rear mold, and the front mold can complete mold closing and injection molding with the rear mold, wherein the rear mold is the core side and the front mold is the cavity side. The rear mold is provided with an injection core, and a cloth-pressing spring block is provided on the rear mold beside the injection core, and correspondingly, a plurality of cloth-hanging needles are fixedly installed on the front mold; the cloth-pressing spring block can touch the front mold before the rear mold during the mold closing process, and complete the stable clamping of the embedded cloth.

[0005] Furthermore, the cloth pressing spring block is arranged on the left and right sides of the injection core, and includes a spring block, a cloth pressing block, an ejection mechanism, a guide mechanism and a limiting mechanism; an adaptive sliding cavity is provided on the rear mold at a position corresponding to the installation of the cloth pressing spring block, and the spring block is accommodated in the corresponding sliding cavity and can slide up and down; a mounting groove is provided at the top of the spring block, and multiple cloth pressing blocks are fixedly installed in the corresponding mounting grooves in sequence by countersunk bolts, and their top ends protrude from the upper edge of the spring block mounting groove.

[0006] Furthermore, the ejection mechanism includes an ejection rod and a spring, the ejection rod is fixed to the rear mold from bottom to top by bolts, and is inserted upward to the bottom of the spring block, the spring is sleeved on the corresponding ejection rod, the upper end of the spring abuts against the bottom of the spring block, and the lower end of the spring abuts against the rear mold; the guide mechanism includes a guide rod and a guide sleeve, the top end of the guide rod is fixedly installed on the bottom of the spring block, the guide sleeve is fixedly installed on the rear mold, and the guide rod can be inserted into the corresponding guide sleeve and slide up and down; the limiting mechanism includes a special screw and a limiting sleeve, wherein the limiting sleeve is fixedly installed on the spring block, its interior is hollow, and a limiting ring extending inward is provided at the lower end, and is integrally formed with the limiting sleeve, the inner ring of the limiting ring can accommodate the screw of the special screw to slide inside it, the lower end of the special screw is fixedly installed on the rear mold, and the upper end of the special screw is arranged in a boss manner, which can form a sliding limit with the limiting ring of the limiting sleeve.

[0007] Furthermore, the ejection mechanism is provided in plurality and is symmetrically and evenly installed below each spring block.

[0008] Furthermore, the cloth pressing blocks are all made of special materials, quenched materials are selected, and the upper edges of all the cloth pressing blocks are rounded.

[0009] Furthermore, each cloth pressing spring block is provided with two corresponding limiting mechanisms, which are respectively located at two ends of the spring block.

[0010] Furthermore, a plurality of cloth hanging needles are fixedly arranged on the front mold, all of which are located on the outer peripheral side of the cloth pressing elastic block; and the heads of the cloth hanging needles are arranged in a pointed shape.

[0011] Furthermore, the cloth pressing block is an integrated structure and is fixedly installed in the top mounting groove of the spring block by countersunk bolts.

[0012] Compared with the prior art, the present invention has the following beneficial effects: the present invention has a simple structure, reasonable arrangement, and is compact and practical. Compared with the existing mold, the stroke of the cloth pressing block becomes larger, and it can fit with the hanging cloth before the rear mold, and cooperate with the cloth hanging needle to complete the tensioning and clamping of the embedded cloth, avoiding deformation, wrinkles, displacement and other problems. Through the guidance of the cloth pressing block, the cloth can be better fitted to the injection molded product, thereby improving the quality of the injection molded product; at the same time, it can save production costs and improve production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 The figure is a schematic diagram of the overall structure of the present invention (taking a half-side mold as an example);

[0014] Figure 2 It is a structural schematic diagram of the rear mold and the cloth pressing elastic block in the present invention;

[0015] Figure 3It is a schematic structural diagram of the front mold and the cloth hanging needle in the present invention;

[0016] Figure 4 It is a schematic diagram of the main structure of the rear mold in the present invention;

[0017] Figure 5 It is a structural schematic diagram of the cloth pressing elastic block in the present invention;

[0018] Figure 6 It is a schematic diagram of the structure of a single cloth pressing elastic block in the present invention;

[0019] Figure 7 It is a front view of a single cloth pressing elastic block in the present invention;

[0020] Figure 8 It is a structural schematic diagram of the bullet block in the cloth pressing bullet block of the present invention;

[0021] Fig. 9 It is a longitudinal sectional view of the limiting mechanism in the cloth pressing elastic block of the present invention;

[0022] Fig.10 It is a schematic diagram of the structure of the cloth hanging needle in the present invention;

[0023] In the figure: 1. front mold, 2. rear mold, 3. ejector plate, 4. bottom plate, 5. cloth pressing spring block, 6. cloth hanging needle, 7. fixed base, 11. injection molding cavity, 21. injection molding core, 22. sliding cavity, 51. spring block, 52. cloth pressing block, 53. ejector rod, 54. spring, 55. guide rod, 56. guide sleeve, 57. special screw, 58. limit sleeve, 501. mounting groove, 502. limit mounting hole, 503. limit ring, 504. boss. DETAILED DESCRIPTION

[0024] It should be noted that, in the description of the present invention, terms such as "upper", "lower", "left", "right", "inside", "outside", "front", "back", "top", "top" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are relational words determined only for the convenience of describing the structural relationships of the various components in the present invention, and do not specifically mean that any component in the present invention must have a specific direction, be constructed and operated in a specific direction, and should not be understood as a limitation on the present invention.

[0025] In addition, in the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "set" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0026] The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings:

[0027] like Figure 1 As shown, a mold with a cloth-hanging tight fitting function includes a front mold 1, a rear mold 2, an ejector plate 3 and a bottom plate 4, wherein the ejector plate 3 and the bottom plate 4 are arranged in sequence from top to bottom directly below the rear mold 2; the front mold 1 is arranged opposite to the rear mold 2, and can complete the operations of mold closing, injection molding, mold opening and taking out parts with the rear mold 2. The rear mold 2 is the core side, combined with Figure 2 As shown, an injection core 21 is provided on it according to the injection molding production requirements; the front mold 1 is the cavity side, combined with Figure 3 As shown, an injection cavity 11 adapted to the injection core 21 is provided thereon, and a plurality of cloth hanging needles 6 extending toward the rear mold 2 are fixedly arranged on the mold body around the injection cavity 11, and the plurality of cloth hanging needles 6 are fixedly installed on the front mold 1 through a fixed base 7 adapted thereto, and are relatively perpendicular to the front mold 1, with reference to Fig.10 As shown, the lower end of each cloth hanging needle 6 is configured in a pointed shape, so as to directly pierce and embed the cloth, thereby completing the hanging of the cloth to adapt to the subsequent mold closing and injection molding.

[0028] The rear mold 2 is provided with a needle hole corresponding to the position of the cloth hanging needle 6, which is used to accommodate the cloth hanging needle 6 after the mold is closed. At the same time, the rear mold 2 is also equipped with cloth pressing elastic blocks 5, which are specifically arranged on the two long sides of the injection core 21, and there are two sets of cloth pressing elastic blocks 5; corresponding to the position, combined with Figure 4 As shown, the rear mold 2 is provided with two downwardly concave sliding cavities 22, and the bottom of each sliding cavity 22 is provided with a plurality of mounting holes penetrating the thickness of the rear mold 2; the cloth pressing elastic blocks 5 are respectively adapted to be installed in the corresponding sliding cavities 22 and can slide up and down along them. Figures 5 to 8As shown, the cloth pressing spring block 5 includes a spring block 51, a cloth pressing block 52, an ejection mechanism, a guide mechanism and a limiting mechanism, wherein the spring block 51 is adapted to be installed in the sliding cavity 22, and its top surface is provided with a downwardly recessed installation groove 501, and the bottom of the installation groove 501 can be arranged in a stepped shape to facilitate the installation of multiple cloth pressing blocks 52 of different specifications, so that they can adapt to the molding surface of the front mold 1. The cloth pressing blocks 52 are provided with multiple pieces, all of which are fixedly installed in corresponding positions in the installation groove 501 by countersunk bolts, connected end to end, and have a smooth transition between their upper surfaces, which can perfectly fit with the molding surface of the front mold 1 to clamp the hung cloth; the cloth pressing blocks 52 are made of special hard materials such as quenching materials to avoid burrs and scratches on the cloth during the mold closing collision process; the upper surfaces of the cloth pressing blocks 52 are slightly higher than the upper edges of the installation groove 501 on the slider 51, and the upper edges of the cloth pressing blocks 52 are rounded to make them in smooth contact with the cloth to prevent friction and scratches. The ejection mechanism is mainly used for the ejection action of the cloth pressing spring block 5, and includes an ejection rod 53 and a spring 54. The ejection rod 53 passes through the corresponding mounting hole on the rear mold 2 from bottom to top and is fixed by screws. The upper end of the ejection rod 53 abuts against the bottom of the spring block 51; the spring 54 is sleeved on the ejection rod 53, and its upper end abuts against the spring mounting hole set at the bottom of the spring block 51, and its lower end abuts against the rear mold 2, which is used to eject the spring block 51 upward; the ejection mechanism is provided with a plurality of groups, which are arranged symmetrically with respect to the center line of the spring block 51, and operate synchronously to prevent the spring block 51 from deviating. The guide mechanism mainly provides direction guidance for the sliding of the spring block 51, including a guide rod 55 and a guide sleeve 56 adapted thereto, wherein the top of the guide rod 55 is fixedly installed at the bottom of the spring block 51; the guide sleeve 56 is fixedly installed in the corresponding mounting hole of the rear mold 2, and the guide rod 55 is inserted into the guide sleeve 56 from top to bottom and can slide up and down; the guide mechanism is provided with two groups on each spring block 51, respectively located at the left and right ends of the spring block 51, to limit and ensure that the spring block 51 can accurately slide up and down. The limiting mechanism is mainly used to limit the upward pop-up stroke of the spring block 51, including a special screw 57 and a limiting sleeve 58, wherein the limiting sleeve 58 is fixedly installed in the limiting mounting holes 502 at both ends of the spring block 51, with both ends open and the interior hollow, combined with Fig. 9 As shown, a limiting ring 503 extending toward the inner diameter is provided at the opening of the lower end of the limiting sleeve 58, which is integrally formed with the limiting sleeve 58; the special screw 57 is inserted into the interior of the limiting sleeve 58 from the upper end of the limiting sleeve 58, and its lower end passes through the inner ring of the limiting ring 503 and is fixed on the rear mold, the screw rod of the special screw 57 can slide up and down in the inner ring of the limiting ring, and the upper end of the special screw 57 is a boss 504, which can form a blocking limit with the limiting ring 503, and the inner cavity length of the limiting sleeve 58 is exactly the ejection stroke of the bullet 51; the limiting mechanism is also provided with two groups, which are respectively located at the two ends of the bullet 51 and operate synchronously to ensure the stability of the bullet 51.

[0029] The above two groups of cloth-pressing spring blocks 5 have the same composition structure, but their specific shapes may be different. They are set into different models according to the processing requirements of the specific production mold to perfectly adapt to the molding of various core products; at the same time, they can be adapted to a variety of different molds that need to embed cloth. The specific number of cloth-pressing spring blocks 5 and their positions on the rear mold 2 can also be adjusted according to actual production needs.

[0030] During the specific mold closing process, the required embedded fabric is first tensioned and hung on multiple cloth hanging needles 6, and then the front mold 1 moves toward the rear mold 2; at this time, the cloth pressing spring block 5 on the rear mold 2 pops up upward under the action of its ejection mechanism, and the spring block 51 in the cloth pressing spring block 5 drives the cloth pressing block 52 to touch the embedded fabric upward before the rear mold 2, and works together with the cloth hanging needles 6 and the front mold 1 to clamp the embedded fabric; then the cloth pressing spring block 5 is synchronously reset to the rear mold 2 under the extrusion of the front mold 1, and the cloth hanging needles 6 are inserted into the corresponding pinholes arranged on the outer peripheral side of the cloth pressing spring block 5, so that the embedded fabric fits better on the injection core 21, completing the high-quality injection molding of the product.

[0031] As another optimized technical solution of the present invention, the cloth pressing block 52 in the cloth pressing spring block 5 can be an integrated structure, which is integrally fixed in the top mounting groove 501 of the spring block 51 by countersunk bolts, so as to facilitate disassembly, replacement and subsequent maintenance.

[0032] The relevant technical features that have not been described or mentioned in detail in the above embodiments can be achieved by adopting or referring to the relevant technical solutions in the prior art, and will not be described in detail here.

[0033] Of course, the above description is not a limitation of the present invention, and the present invention is not limited to the above examples. Changes, modifications, additions or substitutions made by ordinary technicians in this technical field within the essential scope of the present invention should also fall within the protection scope of the present invention.

Claims

1. A mold with a cloth-hanging close fitting function, comprising a front mold, a rear mold, an ejector plate and a bottom plate, wherein the ejector plate and the bottom plate are sequentially arranged below the rear mold, the front mold can complete mold closing and injection molding with the rear mold, wherein the rear mold is the core side and the front mold is the cavity side, characterized in that: The rear mold is provided with an injection core, and the rear mold next to the injection core is provided with a cloth pressing spring block, and correspondingly, a plurality of cloth hanging needles are fixedly installed on the front mold; the cloth pressing spring block can contact the front mold before the rear mold during the mold closing process, thereby completing the stable clamping of the embedded cloth.

2. The mold with the function of close fitting of hanging cloth according to claim 1, characterized in that: The cloth pressing spring block is arranged on the left and right sides of the injection core, and includes a spring block, a cloth pressing block, an ejection mechanism, a guide mechanism and a limiting mechanism; an adaptive sliding cavity is provided on the rear mold at a position corresponding to the installation of the cloth pressing spring block, and the spring block is accommodated in the corresponding sliding cavity and can slide up and down; a mounting groove is provided at the top of the spring block, and multiple cloth pressing blocks are fixedly installed in the corresponding mounting grooves in sequence by countersunk bolts, and their top ends protrude from the upper edge of the spring block mounting groove.

3. The mold with the function of close fitting of hanging cloth according to claim 2, characterized in that: The ejection mechanism includes an ejection rod and a spring. The ejection rod is fixed to the rear mold from bottom to top by bolts and inserted upward to the bottom of the spring block. The spring is sleeved on the corresponding ejection rod, and its upper end abuts against the bottom of the spring block, and its lower end abuts against the rear mold; the guide mechanism includes a guide rod and a guide sleeve. The top end of the guide rod is fixedly installed on the bottom of the spring block, and the guide sleeve is fixedly installed on the rear mold. The guide rod can be inserted into the corresponding guide sleeve and slide up and down; the limiting mechanism includes a special screw and a limiting sleeve, wherein the limiting sleeve is fixedly installed on the spring block, its interior is hollow, and a limiting ring extending inward is provided at the lower end, and is integrally formed with the limiting sleeve, the inner ring of the limiting ring can accommodate the screw of the special screw to slide inside it, the lower end of the special screw is fixedly installed on the rear mold, and the upper end is arranged in a boss manner, which can form a sliding limit with the limiting ring of the limiting sleeve.

4. The mold with the function of close fitting of hanging cloth according to claim 3, characterized in that: The ejection mechanisms are provided in plurality and are symmetrically and evenly installed below each spring block.

5. The mold with the function of close fitting of hanging cloth according to claim 3, characterized in that: The cloth pressing blocks are all made of special materials, such as quenched materials, and the upper edges of all the cloth pressing blocks are rounded.

6. The mold with the function of close fitting of hanging cloth according to claim 3, characterized in that: Each cloth pressing spring block is provided with two corresponding limiting mechanisms, which are respectively located at two ends of the spring block.

7. The mold with the function of close fitting of hanging cloth according to claim 2, characterized in that: A plurality of cloth hanging needles are fixedly arranged on the front mold and are all located on the outer peripheral side of the cloth pressing elastic block; the heads of the cloth hanging needles are arranged in a pointed shape.

8. The mold with the function of close fitting of hanging cloth according to claim 2, characterized in that: The cloth pressing block is an integrated structure and is fixedly installed in the top installation groove of the spring block by countersunk bolts.

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