CN214773686U - Forming die of porous rubber buffer - Google Patents

Abstract

The utility model discloses a forming die of porous rubber buffer belongs to rubber goods processing field. The utility model discloses a forming die, which is used for the injection molding process of a porous rubber plug, wherein a plurality of process holes are formed on the porous rubber plug; the molding die is sequentially provided with an injection plug, an upper die, a middle die, a lower die and a die core for forming holes of the porous rubber plug from top to bottom; gaps communicated with each other are formed between the injection plug and the upper die, between the middle die and the lower die and between the die core and the upper die and the middle die respectively, and the gaps are used for forming flash of the integral structure; the upper die is internally provided with a cavity and a glue injection hole corresponding to the process hole, and the middle die is provided with a mounting hole. The utility model discloses forming die is behind the rubber buffer shaping, through tearing the whole overlap at fabrication hole both ends, can once only dispose the little overlap that a plurality of fabrication holes correspond the end to improve the production efficiency to the rubber buffer.

Description

Forming die of porous rubber buffer

Technical Field

The utility model relates to a rubber products processing technology field, more specifically say, relate to a forming die of porous rubber buffer.

Background

In the processing and manufacturing industries of rubber, plastic, metal products and the like, the porous rubber plug is widely applied to various fields of automobiles and the like due to the advantages of good elasticity, large deformation, good fitting property and the like. The product needs to be molded by casting with a mold, but the joint between the molds often forms flash which affects the quality of the product. The flash is also called as flash, burr, etc., and mostly occurs at the parting and joining position of the mold, such as the parting surface of the movable mold and the static mold, the sliding fit position of the slide block, the clearance of the insert, the hole of the ejector rod, etc., and the flash is caused by the failure of the mold locking force of the mold or the machine table to a great extent. In general, flash formation by injection molding is unavoidable.

Because set up a plurality of holes in the porous rubber buffer, and the diameter in hole is less, the overlap clearance degree of difficulty is great, and mode through clearing up the overlap in turn can consume too much manpower man-hour, consequently how to clear away the overlap about the aperture in the vulcanization molding process, is the problem that awaits the solution in the porous rubber buffer industrial production.

The application discloses an automatic demolding and vulcanizing forming die for a sugarcoated haw structure wire harness sealing ring and a manufacturing method thereof (patent application number: 201911313330.5, application date: 2019, 12 months and 18 days). The vulcanization forming die comprises a lower die, a middle die, an upper die, a top die and a die core, wherein the lower die, the middle die, the upper die and the top die are sequentially arranged from bottom to top, the die core is arranged on the lower die, a die cavity is arranged on the lower side of the upper die, an injection molding cavity is arranged on the upper side of the upper die, the die cavity is communicated with the injection molding cavity through an injection molding hole, and an injection plug is arranged on the lower side of the top die; after the lower die, the middle die, the upper die and the top die are assembled, the die core can penetrate through the middle die to enter the die cavity, the top of the die core is inserted into the glue injection hole, and the injection plug is embedded into the injection cavity. The method can adopt a vulcanization molding die to manufacture the wire harness sealing ring of the sugarcoated haw structure.

This application can be after pencil sealing washer vulcanization moulding, the automatic drawing of patterns that carries on, and the through wires hole can not break, can not damage the mold core, and the product percent of pass is high, and production efficiency is high. However, the flash generated around the hole is still difficult to clean at one time, and the production efficiency needs to be improved by further improving the production process.

SUMMERY OF THE UTILITY MODEL

1. Technical problem to be solved by the utility model

The utility model aims to overcome among the prior art porous rubber stopper after vulcanization operation, the fabrication hole is because of there being many flashes and product quality is lower, deburring complex operation's not enough, provides a forming die of porous rubber buffer, is provided with fit clearance between its part of mutually supporting, and the fabrication hole periphery can form the whole flash of being convenient for to get rid of after the vulcanization.

2. Technical scheme

In order to achieve the above purpose, the utility model provides a technical scheme does:

the utility model discloses a forming die of a porous rubber plug, which is used for the injection molding process of the porous rubber plug, wherein a plurality of process holes are formed on the porous rubber plug; the molding die is sequentially provided with an injection plug, an upper die, a middle die, a lower die and a die core for forming holes of the porous rubber plug from top to bottom; gaps communicated with each other are formed between the injection plug and the upper die, between the middle die and the lower die and between the die core and the upper die and the middle die respectively, and the gaps are used for forming flash of an integral structure;

the upper die is internally provided with a cavity and a glue injection hole corresponding to the process hole, one end of the glue injection hole is positioned on the upper end surface of the upper die, and the other end of the glue injection hole is communicated with the cavity;

the mounting hole has been seted up to the well mould, the mounting groove has been seted up to the lower mould, the mold core upper end can pass mounting groove and mounting hole and be located the die cavity.

As a further improvement, the mold core includes shaping section, changeover portion and canned paragraph, the shaping section is located in the die cavity for form porous rubber buffer's fabrication hole, the mounting hole location fit of changeover portion and well mould, canned paragraph and mounting groove location fit.

As a further improvement, the upper die upper end face is provided with the spread groove, be linked together through the spread groove between two adjacent injecting glue hole upper end drill way.

As a further improvement, the lower die downside is provided with a backing plate for fixing the lower die and the die core.

As a further improvement, the upper die lower side surface and the middle die are provided with a tearing edge cavity between the upper side surface and the middle die, and the tearing edge cavity extends along the outer edge of the cavity.

As a further improvement, the upper end face of the hole wall of the glue injection hole is provided with a chamfer.

As a further improvement, clearance fit includes annotate the first clearance that forms between stopper downside and the last mould up side the second clearance that forms between mold core side and the injecting glue hole lateral wall the third clearance that forms in vertical direction between mold core up end and the die cavity up end the fourth clearance that forms between the changeover portion of mold core and the mounting hole of well mould the fifth clearance that forms between well mould and the lower mould.

As a further improvement of the utility model, the length of the first gap is set to be 0.1 mm-0.3 mm.

As a further improvement of the utility model, the length of the second gap and the third gap is set to be 0.1 mm-0.2 mm.

As a further improvement, the lower end face of the upper die is provided with a positioning concave surface, the lower end face of the injection plug is provided with a positioning convex surface, and the positioning concave surface is matched with the positioning convex surface in a positioning mode.

3. Advantageous effects

Adopt the technical scheme provided by the utility model, compare with prior art, have following beneficial effect:

(1) the utility model discloses a forming die of a porous rubber plug, which is provided with an injection plug, an upper die, a middle die and a lower die from top to bottom in sequence, and a die core for forming a hole on the porous rubber plug; gaps communicated with each other are formed between the injection plug and the upper die, between the middle die and the lower die and between the die core and the upper die and the middle die respectively, and the gaps are used for forming flash of an integral structure. The overlap of overall structure divide into the lower overlap of last overlap and fabrication hole lower extreme of fabrication hole upper end, the utility model discloses forming die is behind the rubber buffer shaping, goes up the burr or the overlap that a plurality of fabrication holes correspond the end can once only be clear away with lower overlap when tearing off to improve the production efficiency to the rubber buffer.

(2) The utility model provides an last mould up end is provided with the spread groove, is linked together through the spread groove between two adjacent injecting glue hole upper end drill ways, can prevent the flash in injecting glue hole, also can make the injecting glue in fabrication hole more even to improve product quality. Go up the mould downside and be provided with between the side on the well mould and tear the limit die cavity, tear the limit die cavity and extend along the die cavity outer fringe, can form bellied edge rib that tears on the overlap of rubber buffer after the rubber buffer shaping, hold and tear the edge rib and can tear the overlap fast along the rubber buffer outer fringe to improve and tear limit efficiency and reduce and tear the limit rejection rate.

Drawings

Fig. 1 is a schematic sectional view of the forming die of the present invention;

FIG. 2 is a partial schematic view of a forming die;

FIG. 3 is a schematic top view of a glue injection hole and a connecting groove;

FIG. 4 is a schematic view of a mold core;

FIG. 5 is a schematic top view of a porous rubber stopper;

FIG. 6 is a schematic side view of a porous rubber stopper;

fig. 7 is a schematic cross-sectional view of a comparative molding die.

The reference numerals in the schematic drawings illustrate:

1. a porous rubber plug; 10. a fabrication hole; 2. filling a plug; 20. positioning the convex surface; 3. an upper die; 30. injecting glue holes; 31. a cavity; 32. connecting grooves; 33. positioning the concave surface; 4. a middle mold; 40. mounting holes; 5. a lower die; 50. mounting grooves; 51. a base plate; 6. a mold core; 60. a forming section; 61. a transition section; 62. a fixed section; 7. and (5) tearing the edge cavity.

Detailed Description

For a further understanding of the present invention, reference will be made to the following detailed description taken in conjunction with the accompanying drawings and examples.

The structure, proportion, size and the like shown in the drawings of the present specification are only used for matching with the content disclosed in the specification, so as to be understood and read by those skilled in the art, and are not used for limiting the limit conditions of the present invention, so that the present invention has no technical essence, and any structural modification, proportion relation change or size adjustment should still fall within the scope of the technical content disclosed in the present invention without affecting the efficacy and the achievable purpose of the present invention. In addition, the terms "upper", "lower", "left", "right" and "middle" used in the present specification are for clarity of description, and are not intended to limit the scope of the present invention, and the relative relationship between the terms and the relative positions may be changed or adjusted without substantial technical changes.

The present invention will be further described with reference to the following examples.

Example 1

The utility model discloses a forming die is used for porous rubber buffer 1's injection moulding, as shown in fig. 5, fig. 6, and the fabrication hole 10 that porous finger is on the rubber buffer is provided with a plurality of, and this fabrication hole 10 is the through hole. Due to the small diameter size of the orifice at both ends of the process orifice 10, clogging of the orifice is often caused by flash. Since the molding die is usually formed by matching a plurality of dies, and a certain gap is left between the dies, flash is an inevitable problem of the dies. Usually, after the product is formed and demolded, the flash is removed by hand tearing or machining, but because the diameter size of the orifices at the two ends of the fabrication hole 10 is small, once the flash is torn or removed incompletely, the flash can block or partially block the orifices of the fabrication hole 10, thereby reducing the product quality and increasing the rejection rate. In addition, the rubber stopper is provided with a plurality of process holes 10, and the separate edge tearing of the periphery of each process hole 10 increases the processing time, thereby causing a reduction in production efficiency.

In order to solve the problem of the 10 drill way overlap of fabrication hole of rubber buffer, the utility model discloses a forming die is formed with the clearance that is linked together between the mould and between mould and mold core 6, makes 10 both ends drill ways of fabrication hole form whole overlap respectively, and the overlap that whole overlap indicates a plurality of fabrication hole 10 to produce is even as an organic whole. Under the condition that a plurality of processing stations are arranged on one forming die to simultaneously produce a plurality of rubber plugs, the whole flash can further form a structure that the flash at one end of the process hole 10 on the plurality of processing stations is connected into a whole, so that the time consumed for tearing the flash is further reduced, and the production efficiency is improved.

As shown in fig. 7, the conventional processing method is to use an insert to simultaneously fix a plurality of mold cores 6 in one processing position, and a single processing position is produced corresponding to a single rubber stopper. The flash formed between the insert and the die is not continuous with the flash of the rubber plug between the dies, at the moment, the flash of the orifices at the two ends of the fabrication hole 10 and the flash of the rubber plug cannot be connected into a whole, the flash of the orifices of the fabrication hole 10 cannot be driven when the flash of the rubber plug is removed, and the flash of the orifices of the fabrication hole 10 can be only processed independently, so that the production efficiency can be greatly reduced.

As shown in fig. 1 to 4, the forming mold of the porous rubber plug 1 of the present embodiment is provided with an injection plug 2, an upper mold 3, a middle mold 4 and a lower mold 5 from top to bottom in the vertical direction, and a mold core 6 for forming a hole in the porous rubber plug 1, gaps are provided between the injection plug 2 and the upper mold 3, and between the middle mold 4 and the lower mold 5, the mold core 6 is provided with gaps with the upper mold 3 and the middle mold 4, and the gaps are used for forming flash of an integral structure at two ends of the fabrication hole 10 after the vulcanization forming of the porous rubber plug. Gaps between the injection plug 2 and the upper die 3 and between the upper die 3 and the die core 6 form upper flashes at the upper end of the process hole 10, wherein the gaps between the injection plug 2 and the upper die 3 form a first body of the upper flashes; the mold core 6 is in clearance fit with the upper mold 3, and specifically, a first hole edge of an upper flash is formed between the mold core 6 and the upper end of the cavity 31 of the upper mold 3; the first body and the first hole edge are connected to the glue material at the glue injection hole 30, the first body covers a plurality of processing positions on the die, and the first body can drive the first hole edge connected with the first body when the edge is torn, so that the first hole edges at the plurality of processing holes 10 on the plurality of processing positions are removed, and due to the fact that the upper die 3 and the die core 6 are in clearance fit, the flash thickness is larger than that of flashes generated at the die cavity 31 and the die core 6 during normal processing, the flashes cannot be broken when the edges are torn due to the fact that the flashes are too thin, and the first hole edges at the processing holes 10 cannot be removed.

The middle die 4 and the lower die 5 and the die core 6 and the upper die 3 and the middle die 4 are in clearance fit to form a lower flash at the lower end of the fabrication hole 10, wherein a second body of the lower flash is formed by a clearance arranged between the lower middle die 4 and the lower die 5, a clearance is arranged between the die core 6 and the middle die 4, specifically, a second hole edge of the lower flash is formed between the upper die 3 and the middle die 4 due to a die assembly clearance, a connecting edge is formed between the die core 6 and the mounting hole 40 of the middle die 4, and the second body and the second hole edge can be connected, so that the second hole edge at the plurality of fabrication holes 10 on a plurality of processing stations can be removed.

The corresponding injecting glue hole 30 of die cavity 31 and fabrication hole 10 has been seted up to this embodiment in last mould 3, and injecting glue hole 30 one end is located last mould 3 up end, and injecting glue hole 30 other end intercommunication die cavity 31, and the sizing material gets into in the die cavity 31 through injecting glue hole 30 and down flows into each complex clearance that links to each other with die cavity 31 along with the action of gravity, after the sizing material is through the heating vulcanization shaping, forms the rubber buffer and the overlap that links to each other with the rubber buffer.

In order to process the fabrication hole 10 of the rubber stopper, the present embodiment provides a mold core 6 in the mold cavity 31, and the mold core 6 occupies the fabrication hole 10 of the mold cavity 31, so as to mold the fabrication hole 10. In this embodiment, the middle mold 4 has a mounting hole 40, the lower mold 5 has a mounting groove 50, the upper end of the mold core 6 can pass through the mounting groove 50 and the mounting hole 40 and be located in the cavity 31, and the bottom of the mold core 6 is embedded in the mounting groove 50.

The mold core 6 comprises a forming section 60, a transition section 61 and a fixing section 62 depending on the position of cooperation with the mold. The molding section 60 is positioned in the cavity 31 and is used for forming the process holes 10 of the porous rubber plug 1, and the forming section is the position for forming holes by the mold core 6; the transition section 61 is in positioning fit with the mounting hole 40 of the middle mold 4, and plays a role in mounting the middle mold 4; the fixed section 62 and the mounting groove 50 are in positioning fit to realize lateral positioning of the fixed section 62, and in addition, the diameter of the lower end of the fixed section 62 is increased to form a buckling mechanism with the lower die 5, so that the die core 6 is limited in the die cavity 31.

In order to optimize the formation of the lower flash and to make the flow of the rubber material between the mold and the mold core 6 smoother, the diameter of the lower end of the molding section 60 of the mold 4 core is larger than the diameter of the transition section 61, and preferably, the diameter of the lower end of the molding section 60 is 0.2mm larger than the diameter of the transition section 61.

The rubber buffer in this embodiment is provided with a plurality of fabrication holes 10, and the position and the quantity in injecting glue hole 30 correspond with fabrication hole 10. As shown in the figure, the upper end face of the upper die 3 is provided with a connecting groove 32, and the upper end orifices of two adjacent glue injection holes 30 are communicated through the connecting groove 32, so that the flash of the glue injection holes 30 can be prevented, the glue injection of the fabrication holes 10 can be more uniform, and the product quality is improved. In order to fix the lower end of the lower die 5 and the lower end of the die core 6 conveniently, the lower side of the lower die 5 is provided with a backing plate 51, and the size of the surface of the backing plate 51 is matched with that of the upper end surface of the lower die 5.

The operation of the overlap is torn off to artifical tearing behind the rubber buffer shaping, for the convenience of tearing the edge, can set up bellied edge rib of tearing on the overlap of rubber buffer, holds during manual operation and tears the edge rib and tear the overlap along the rubber buffer outer fringe. For forming the tearing edge rib, the embodiment is provided with the tearing edge cavity 7 between the lower side surface of the upper die 3 and the upper side surface of the middle die 4, the tearing edge cavity 7 extends along the outer edge of the cavity 31, specifically, the upper side surface of the upper die 3 is provided with an upper cavity of the tearing edge cavity 7, and the upper side surface of the middle die 4 is provided with a lower cavity of the tearing edge cavity 7.

In order to form the positioning between the upper die 3 and the injection plug 2 on the side surface, the lower end surface of the upper die 3 is provided with a positioning concave surface 33, the lower end surface of the injection plug 2 is provided with a positioning convex surface 20, and the positioning groove is matched with the positioning block in a positioning way. Similarly, the upper end surface of the lower die 5 and the lower end surface of the middle die 4 can be matched by a similar convex surface and concave surface.

Example 2

This embodiment further defines the clearance fit in the mold to optimize the removal of flash around the tooling hole 10 in the rubber stopper when tearing off the entire flash. The communicated gaps comprise a first gap formed between the lower side surface of the injection plug 2 and the upper side surface of the upper die 3, a second gap formed between the side edge of the die core 6 and the side wall of the glue injection hole 30, a third gap formed between the upper end surface of the die core 6 and the upper end surface of the cavity 31 in the vertical direction, a fourth gap formed between the transition section 61 of the die core 6 and the mounting hole 40 of the middle die 4, and a fifth gap formed between the middle die 4 and the lower die 5. The length of the first gap is set to be 0.1 mm-0.3 mm, and the length of the second gap and the third gap is set to be 0.1 mm-0.2 mm.

In order to go up the overlap in first body and first hole limit be connected more stably, appear splitting when avoiding tearing the limit, this embodiment is provided with the chamfer at the up end of injecting glue hole 30 pore wall, and is further, this chamfer sets up to the circular arc chamfer, and the chamfer radius sets up to 0.5 mm.

The present invention and its embodiments have been described above schematically, and the description is not limited thereto, and what is shown in the drawings is only one of the embodiments of the present invention, and the actual structure is not limited thereto. Therefore, if the person skilled in the art receives the teaching of the present invention, without departing from the inventive spirit of the present invention, the person skilled in the art should also design the similar structural modes and embodiments without creativity to the technical solution, and all shall fall within the protection scope of the present invention.

Claims (10)

1. A forming die of a porous rubber plug is used for an injection molding process of the porous rubber plug (1), wherein a plurality of process holes (10) are formed in the porous rubber plug (1); the method is characterized in that: the molding die is sequentially provided with an injection plug (2), an upper die (3), a middle die (4), a lower die (5) and a die core (6) for forming holes in the porous rubber plug (1) from top to bottom; gaps communicated with each other are formed between the injection plug (2) and the upper die (3), between the middle die (4) and the lower die (5), and between the die core (6) and the upper die (3) and the middle die (4) respectively, and the gaps are used for forming flash of an integral structure;

a cavity (31) and a glue injection hole (30) corresponding to the process hole (10) are formed in the upper die (3), one end of the glue injection hole (30) is located on the upper end face of the upper die (3), and the other end of the glue injection hole (30) is communicated with the cavity (31);

mounting hole (40) have been seted up in well mould (4), mounting groove (50) have been seted up in lower mould (5), mold core (6) upper end can pass mounting groove (50) and mounting hole (40) and be located die cavity (31).

2. The forming die of the porous rubber plug as claimed in claim 1, characterized in that: the mold core (6) comprises a molding section (60), a transition section (61) and a fixing section (62); after the die assembly, the molding section (60) is located in the die cavity (31) and is used for forming the fabrication hole (10) of the porous rubber plug, the transition section (61) is in positioning fit with the mounting hole (40) of the middle die (4), and the fixing section (62) is in positioning fit with the mounting groove (50).

3. The forming die of the porous rubber plug as claimed in claim 2, characterized in that: go up mould (3) up the terminal surface and be provided with spread groove (32), be linked together through spread groove (32) between two adjacent gluey hole (30) upper end mouths of a river.

4. The forming die of the porous rubber plug as claimed in claim 3, characterized in that: and a base plate (51) is arranged on the lower side of the lower die (5) and used for fixing the lower die (5) and the die core (6).

5. The forming die of the porous rubber plug as claimed in claim 1, characterized in that: go up mould (3) downside and well mould (4) and be provided with between the side and tear limit die cavity (7), it extends along die cavity (31) outer fringe to tear limit die cavity (7).

6. The forming die of the porous rubber plug as claimed in claim 3, characterized in that: and a chamfer is arranged at the upper end of the wall of the glue injection hole (30).

7. The forming die of the porous rubber plug as claimed in claim 1, characterized in that: the clearance includes annotate the first clearance that forms between stopper (2) downside and the last side of mould (3), the second clearance that forms between mould core (6) side and the gluey hole (30) lateral wall of notes, the third clearance that forms on vertical direction between mould core (6) up end and die cavity (31) up end, the fourth clearance that forms between changeover portion (61) of mould core (6) and mounting hole (40) of well mould (4), the fifth clearance that forms between well mould (4) and lower mould (5).

8. The forming die of the porous rubber plug as claimed in claim 7, characterized in that: the length of the first gap is set to be 0.1 mm-0.3 mm.

9. The forming die of the porous rubber plug as claimed in claim 8, characterized in that: the lengths of the second gap and the third gap are set to be 0.1 mm-0.2 mm.

10. The forming die of the porous rubber plug as claimed in claim 1, characterized in that: go up terminal surface under mould (3) and be provided with location concave surface (33), the terminal surface is provided with location convex surface (20) under notes stopper (2), location concave surface (33) and location convex surface (20) location fit.

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