CN211640661U - Mold pressing belt mold - Google Patents

Abstract

The utility model provides a novel mould pressing belt mold, this mould pressing belt mold have gasbag, centre form, and gasbag and centre form are at end seal connection, and the surface of this centre form is provided with alternate arrangement's sand grip and recess, adopt the utility model relates to a mould pressing belt mold can effectively improve mould pressing belt mold's life and practice thrift very big manpower and material resources cost.

Description

Mold pressing belt mold

The technical field is as follows:

the utility model relates to an moulding belt mould especially relates to moulding belt mould's centre form.

Background art:

a transmission belt, particularly a transmission belt molded by a press molding method, is widely known, and as a press-molded v-ribbed belt disclosed in chinese publication CN103161879A, as described with reference to fig. 1 in this specification, an inner mold 1 and an outer mold 2, which are concentrically arranged and respectively have a cylindrical shape, are mainly used in the vulcanization molding process. The inner mold 1 is provided at its periphery with an air bag 4 made of a flexible material such as rubber, and the outer mold is provided at its inner surface with a molding surface such as a V-shaped wedge groove. In addition, the well-winded rubber sleeve 3 is put into the inner cavity of the outer die 2, the inner diameter of the rubber sleeve 3 is slightly larger than the outer diameter of the inner die 1 with the air bag 4, after the inner die is put into the outer die, high-pressure air is filled between the inner die and the air bag, the air bag expands and further pressurizes the rubber sleeve to move towards the outer die, the rubber sleeve is pressurized, heated and vulcanized to form through the air bag and the outer die, the vulcanized and formed rubber sleeve is taken out, the multi-wedge belt is cut and formed according to the required width, the processing method of the above mould pressing multi-wedge belt is known, but at present, because the air bag is frequently inflated and deflated, the local bulge of the air bag is greatly deformed as the label 5 in the specification figure 1 after being used for many times, the original state cannot be recovered, the local part is not attached to the outer wall of the inner die after being deflated, the diameter is enlarged, the air bag needs to be frequently replaced, the, the rubber sleeve is displaced or inclined, and the rubber sleeve part is not formed or is insufficiently formed after vulcanization, so that cutting scrap is caused; further, when the air bag is deformed more, the air bag cannot be placed into an outer mold, and the production cannot be performed, so that the current situation is urgently needed to be solved.

The utility model has the following contents:

the utility model discloses a solve this problem, provide a novel mould pressing area mould, including gasbag, centre form, gasbag and centre form are at end seal connection, and the surface of centre form has alternate arrangement's recess and sand grip.

Preferably, the grooves and the ribs extend axially along the inner die.

Preferably, the grooves and the raised strips are arranged in parallel along the circumferential direction of the inner die.

Preferably, the grooves are the same size.

Preferably, the ribs are the same size.

Preferably, the convex strip is a convex tube arranged on the surface of the cylindrical structure.

Preferably, a portion of said grooves communicate at the surface of the cylindrical structure.

Preferably, the air holes are arranged on part of the grooves.

Preferably, the air holes are located at both ends of the groove.

Preferably, the air holes at two ends of the same groove are at least indirectly communicated through an air pipe.

The mold for molding the belt further comprises an outer mold, wherein the inner surface of the outer mold is provided with a molding tooth structure.

The molding belt die is a molding poly-wedge belt die.

The die pressing belt die is a trimming V-belt die for die pressing.

Adopt the utility model discloses a mould pressing area mould structure can effectively improve the mould pressing area mould the life, reduces the change frequency of gasbag, has improved production efficiency simultaneously and has reduced manufacturing cost.

Description of the drawings:

FIG. 1 is a schematic view of the process of placing an inner mold into an outer mold;

fig. 2 is a schematic view of the internal mold of the present invention;

fig. 3, a-a section view in fig. 2.

The specific implementation mode is as follows:

as shown in fig. 1, the molding belt mold comprises a cylindrical inner mold 1 and an elastic air bag 4 arranged at the periphery of the inner mold 1, wherein the elastic air bag 4 is hermetically connected with the inner mold 1 at two end parts of the inner mold 1 through a connecting part (not shown), a closed cavity is formed between the elastic air bag 4 and the outer surface of the inner mold 1, and an air hole 11 connected with an air pipe is arranged on the outer surface of the inner mold 1; the molding belt mold further comprises an outer mold 2 arranged on the periphery of the air bag, and the inner surface of the outer mold 2 is provided with a molding surface for forming a tooth shape required by the transmission belt. When the transmission belt is produced, the rubber sleeve 3 which is layered and wound into a barrel shape is placed into the outer mold 2, the inner mold 1 provided with the air bag is placed into the rubber sleeve 3, high-pressure gas is introduced between the inner mold 1 and the air bag 4 through the air pipe to enable the air bag 4 to expand outwards, the rubber sleeve 3 is extruded to move towards the outer mold 2, the rubber sleeve 3 is extruded through the air bag and the outer mold, high-temperature steam is introduced into the inner mold and the outer mold through the steam pipeline to enable the rubber sleeve 3 to be vulcanized, after a certain time, the mold cools the rubber sleeve through the cooling system, and the rubber sleeve is molded. The air pipe is deflated and vacuumized, and the air bag is contracted and recovered. Taking out the vulcanized rubber sleeve, and cutting and molding according to the required width.

As shown in fig. 1 to 3, in order to prevent the diameter of the local protrusion 5 from exceeding the production requirement after the air bag 4 is used for multiple times, a plurality of raised lines and grooves which are arranged alternately are arranged on the outer surface of the cylindrical inner mold 1, and when the vacuum is pumped, the redundant part of the air bag after the diameter is expanded after deformation shrinks into the grooves, so that the overall diameter of the inner mold with the air bag is not changed, and the air bag deformation does not influence the subsequent vulcanization production of the rubber sleeve.

The raised lines and the grooves can be distributed in an inclined and uneven manner, but for the convenience of manufacture and the uniform stress when the air bag contracts, the raised lines 14 and the grooves 13 are alternately and uniformly arranged along the circumferential direction of the inner die, and the grooves 13 and the raised lines 14 extend in parallel along the axial direction of the inner die 1. The ribs 14 may be provided integrally with the inner mold 1, that is, a concave-convex structure is provided on the inner mold having an integral cylindrical shape. In order to improve the processing performance, it is preferable that the inner mold 1 includes a cylindrical structure and a convex strip provided on the surface of the cylindrical structure. The protruding strips 14 may be protruding tubes separately arranged on the cylindrical structure, and a groove structure is defined between the protruding tubes and the outer surface of the cylindrical structure.

The groove 13 is provided with an air hole 11 communicated with an air pipe. The elastic air bags 4 are placed on the periphery of the inner die 1 and are hermetically connected with the end parts of the inner die 1 at two axial sides of the inner die through a fixing mechanism. When the air tube is inflated by high-pressure air, the air bag 4 is forced to expand outward in a cylindrical shape. The required percentage elongation of gasbag of length according to the drive belt of difference of size width and the degree of depth of recess sets up, and for the atress is unanimous when guaranteeing that the gasbag aerifys or loses heart, preferably the recess size the same, and the sand grip size the same, sand grip and recess along centre form circumferencial direction align to grid. The air holes 11 on the grooves 13 are also preferably equally spaced and arranged along the circumference. In order to ensure the uniformity of gas flow between the air bag 4 and the internal mold 1 during air leakage and vacuum pumping and prevent the air bag from partially attaching to the internal mold to block other gas from being leaked out and influence the contractibility of the air bag, an upper air hole 11 and a lower air hole 12 are preferably arranged at the upper end and the lower end of the groove respectively, and the two air holes are at least indirectly communicated through an air pipe. Preferably, the two air holes are communicated through the same air pipe. In order to ensure that the gas is completely extracted, a plurality of air holes can be uniformly arranged in each groove.

Because the centre form inner space is limited, the trachea is too much then causes the difficulty of arranging, and the space is not enough, and the cost increases, consequently there is gap or passageway intercommunication at the inner mould surface between the at least partial recess of preferred or whole recess, can only be provided with the gas pocket with the trachea intercommunication on partial recess like this, and the gas pocket is connected with the trachea, reduces tracheal quantity. For example: the groove 13 is of an integral cylindrical structure, the convex strip 14 is of a structure separately arranged on the surface of the groove 13, and a gap is arranged on the joint surface part between the convex strip 14 and the groove 13. If the convex strips 14 are welded on the surfaces of the grooves 13 of the integral structure, the convex strips 14 are welded in partial sections, and gaps are reserved in the partial sections to ensure that the grooves 13 are communicated with each other on the outer surface of the cylindrical structure.

The utility model relates to a because the centre form surface is provided with the recess, even the diameter increase of using back gasbag repeatedly, because at interior mould surface design recess, the holistic outer periphery of external mold exceeds the gasbag diameter, but evacuation gasbag shrink back, the unnecessary part that the gasbag warp the enlarged diameter can tighten up in interior mould recess, and avoided gasbag protrusion centre form to set for the diameter, consequently the gasbag can not produce local arch and exceed the phenomenon of sand grip, consequently take the centre form diameter of gasbag still can satisfy the production requirement, so even gasbag diameter grow also can normal use, the service life of gasbag has been increased.

Adopt the utility model discloses an centre form, the life of gasbag is calculated according to the number of times of the telescopic work of production rubber and has promoted one time more than prior art, and rubber sleeve can not shift because of the gasbag is protruding simultaneously, therefore rubber sleeve's cutting disability rate also greatly reduced, can save a large amount of manpowers and material resources simultaneously and change and make the gasbag, reduced manufacturing cost.

The utility model discloses can be applied to mould pressing polywedge bet, also can be used to compression molding's side cut V area, but not limited to this, all adopt the utility model discloses the drive belt mould of structure all contains the utility model discloses in conceiving, simultaneously the utility model discloses position relation such as upper and lower in the text only is according to the drawing be convenient for understand and go on the description, and is not right the utility model discloses a restriction.

Claims (13)

1. A mould pressing belt mould comprises an air bag and an inner mould, wherein the air bag and the inner mould are connected at the end part in a sealing way.

2. The molding belt mold of claim 1, wherein said grooves and ribs extend axially along the inner mold.

3. The molding belt mold of claim 2, wherein said grooves and said ribs are arranged in parallel in the circumferential direction of the inner mold.

4. The embossing belt die of claim 3, wherein the grooves are the same size.

5. The embossing belt die of claim 4, wherein the ribs are the same size.

6. An embossing belt die as claimed in any one of claims 1 to 5, wherein said ribs are ribs provided on the surface of the cylindrical structure.

7. The molding belt mold of claim 6, wherein at least some of said recesses communicate at the surface of the cylindrical structure.

8. The embossing belt mold of claim 7, wherein a portion of the grooves are provided with air holes.

9. The embossing belt mold of claim 8, wherein the air holes are located at both ends of the groove.

10. The molding belt mold of claim 9, wherein the air holes at the two ends of the same groove are at least indirectly connected by air pipes.

11. The molding belt mold of claim 1, further comprising an outer mold, the outer mold inner surface having a shaped tooth structure.

12. The embossing belt die of claim 11, wherein said embossing belt die is an embossing v-ribbed belt die.

13. The molding belt die of claim 11, wherein the molding belt die is a molded trimmed V-belt die.

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