CN210336642U - Novel rubber blank forming tool - Google Patents

Abstract

The utility model relates to a novel rubber blank forming tool, which comprises an outer opening die and an inner core die, wherein the outer opening die is in a ring shape, an assembly ladder groove is arranged at the periphery of the outer opening die, a hole in the middle of the outer opening die is a forming flow channel, and the forming flow channel is in a circular shape; the inner core mold and the outer opening mold are arranged concentrically, the outer end face of the inner core mold is located inside the outer opening mold, or the outer end face of the outer opening mold is located on the same plane, the diameter of the inner core mold is smaller than that of the forming flow channel, and a plurality of positioning teeth are uniformly arranged on the peripheral face of the inner core mold. The utility model has the advantages that the rubber blank produced by the forming tool is internally provided with the positioning tooth grooves, a smaller positioning column can be clamped in the positioning tooth grooves to fix the rubber blank, the size of a single mould is reduced, and the improvement of the one-time forming quantity is facilitated; the annular shape is more in line with the shape of the product; the arrangement of the positioning tooth grooves can enable redundant air to be discharged through the positioning tooth grooves in the die assembly process.

Description

Novel rubber blank forming tool

Technical Field

The utility model relates to a rubber processing field, more specifically, the utility model relates to a novel rubber glue embryo forms frock.

Background

At present, in the production process of an oil seal or a sealing ring, a rubber blank is usually placed on a mold and pressed into a required shape, and the used rubber blank is mainly classified into an outer diameter positioning type rubber blank or an inner diameter positioning type rubber blank of an inner diameter circular ring.

However, the two rubber blanks have certain limitations in practical production and use: the outer diameter positioning type rubber blank generally needs the size of a mold to be larger than the outer diameter of a product to prevent the mold from interfering with the outer diameter of the product, so that the outer diameter of the whole mold needs to be increased by 20-30mm, the number of cavities is reduced when templates are arranged, the production efficiency is influenced, and the production cost is improved; when the inner ring positioning type rubber blank is used, because the inner diameter is in a ring shape, if the inner ring positioning type rubber blank is directly prevented from being arranged on a cavity, air in the ring is easily sealed into the cavity when the mold is closed, and waste products of air pocket or material shortage are caused; if the glue blank is placed at a position outside the cavity and enters the cavity by the flowing of the glue blank, the flowing distance of the glue blank is increased, a left mark is generated, and waste products with poor healing can be generated.

Therefore, a new rubber base is needed to solve the above problems.

SUMMERY OF THE UTILITY MODEL

The utility model discloses an aim at solve current rubber and glue embryo problem that the cost is higher or the rejection rate is high in the use.

According to one aspect of the utility model, a novel rubber blank forming tool is provided, which comprises an outer opening die and an inner core die, wherein the outer opening die is in a ring shape, an assembly ladder groove is arranged on the periphery of the outer opening die, a hole in the middle of the outer opening die is a forming flow channel, and the forming flow channel is in a circular shape; the inner core mold and the outer opening mold are arranged concentrically, the outer end face of the inner core mold is located inside the outer opening mold, or the outer end face of the outer opening mold is located on the same plane, the diameter of the inner core mold is smaller than that of the forming flow channel, and a plurality of positioning teeth are uniformly arranged on the peripheral face of the inner core mold.

According to the scheme, the rubber blank produced by the forming tool is a round rubber blank with the positioning tooth socket inside, a small positioning column can be clamped in the positioning tooth socket to fix the rubber blank, external positioning is not needed, the size of a single die is reduced, the number of one-step forming is increased, and the cost is reduced; the annular shape is more in accordance with the shape of a product, the moving distance of rubber in a die cavity is reduced, and the rejection rate is reduced; the thickness of the ring-shaped rubber blank is larger, so that each part of the rubber blank can be closer to the cavity, and the moving distance is reduced; the setting of location tooth's socket can be so that at the compound die in-process, and unnecessary air can be discharged through the location tooth's socket, reduces the probability that nest gas phenomenon and scarce material waste product take place, has further reduced manufacturing cost.

Preferably, a protection chamfer is arranged around the outer end of the outer mouth mold.

Through this scheme, protect the cutter, prevent that the cutting edge is direct to contact with the outer die.

Preferably, one end of the molding flow channel, which is close to the inner side, is provided with a flow guide opening, and the flow guide opening is in a bell mouth shape and faces towards the inner side surface.

According to the scheme, the rubber extruded by the forming machine is guided.

Preferably, the inner side of the inner core mould is provided with a mounting column, and the mounting column is provided with threads.

Through this scheme, utilize the screw thread to install and dismantle simple and convenient to the internal mandrel.

Preferably, an adjusting hole is formed in the center of the outer end face of the inner core mold, and the adjusting hole is in a straight shape or a cross shape.

Through this scheme, further made things convenient for the installation and the dismantlement of inside mandrel.

Preferably, the outer end surface periphery of the inner core mould is also provided with a protection chamfer.

Through the scheme, the knife edge of the knife is further protected, and the phenomenon that the installation deviation causes the end face of the inner core die to protrude out of the outer die to cause the knife edge to be damaged is prevented.

Preferably, the diameter of a circle where the cross section of the positioning tooth crest end surface is located is larger than the diameter of the molding runner, or the positioning tooth crest end surface is a plane.

Through the scheme, the parts at two ends of the positioning tooth grooves of the rubber blank are thinner, so that the protruding parts between the positioning tooth grooves are filled up, and the flowing distance of rubber is further reduced; and further facilitate the discharge of air in the middle of the rubber blank

The rubber blank produced by the forming tool has the technical effects that the rubber blank is more approximate to the shape of a produced workpiece, and the production is convenient; the internal positioning is facilitated, the size of the die is reduced, the one-time forming quantity is increased, and the production cost is reduced; the internal air can be discharged, the probability of air pocket and waste products due to shortage of materials is reduced, and the rejection rate is reduced; the flowing distance of the rubber in the production process can be reduced, and the rejection rate is further reduced.

Other features of the present invention and advantages thereof will become apparent from the following detailed description of exemplary embodiments of the invention, which proceeds with reference to the accompanying drawings.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description, serve to explain the principles of the invention.

Fig. 1 is a schematic structural view of a cross-sectional view of a rubber blank forming tool in an embodiment of the present invention.

Fig. 2 is a schematic view of a cross-sectional structure of an outer mold in a rubber blank molding tool according to an embodiment of the present invention.

Fig. 3 is a schematic side view of an outer mold of the rubber compound blank molding tool according to the first embodiment of the present invention.

Fig. 4 is a schematic front view of an inner core mold in a rubber blank molding tool according to a first embodiment of the present invention.

Fig. 5 is a schematic side view of an inner core mold in a rubber blank molding tool according to a first embodiment of the present invention.

Fig. 6 is a schematic diagram of a rubber blank structure produced by a rubber blank forming tool in the first embodiment of the present invention.

Fig. 7 is a schematic side view of an inner core mold in a rubber blank molding tool according to a second embodiment of the present invention.

Fig. 8 is a schematic diagram of a rubber blank structure produced by the rubber blank forming tool in the second embodiment of the present invention.

Wherein like parts are designated by like reference numerals throughout the several views; the figures are not drawn to scale.

Detailed Description

Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that: unless specifically stated otherwise, the relative arrangement of the components and steps, the numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present invention.

The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.

Techniques and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail, but are intended to be considered a part of the specification where appropriate.

In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.

Example one

As shown in fig. 1 to 6, the novel rubber cement blank forming tool in this embodiment includes an outer mold 1100 and an inner mold 1200, the outer mold 1100 is annular, an assembly ladder 1120 is disposed on the periphery of the outer mold 1100, a hole in the middle of the outer mold 1100 is a forming runner 1110, and the forming runner 1110 is circular; the inner core die 1200 and the outer port die 1100 are concentrically arranged, the outer end face of the inner core die 1200 does not protrude out of the outer end face of the outer port die 1100, namely, the inner core die 1200 is located inside the outer port die 1100 or located in the same plane with the outer end face of the outer port die 1100, the diameter of the inner core die 1200 is smaller than that of the forming runner 1110, and a plurality of positioning teeth 1210 are uniformly arranged on the circumferential surface of the inner core die 1200.

According to the scheme of the embodiment, the rubber blank produced by using the forming tool is the circular rubber blank 2000 with the positioning tooth groove 2100 inside, as shown in fig. 6, when the rubber blank is positioned, a small positioning column can be clamped in the positioning tooth groove 2100 to fix the rubber blank, external positioning is not needed, the size of a single die is reduced, the one-time forming quantity is favorably improved, and the cost is reduced; the annular shape is more in accordance with the shape of a product, the moving distance of rubber in a die cavity is reduced, and the rejection rate is reduced; compared with a circular shape with the same volume, the annular glue blank has larger thickness, each part of the glue blank can be closer to the cavity, and the moving distance is reduced; the arrangement of the positioning tooth grooves 2100 can enable redundant air to be discharged through the positioning tooth grooves 2100 in the die assembly process, so that the probability of air pocket phenomenon and material shortage waste products is reduced, and the production cost is further reduced.

In this embodiment or other embodiments, the outer end of the outer die 1100 is provided with a protection chamfer 1140 at the periphery thereof, so as to protect the cutter and prevent the blade from directly contacting the outer die 1100.

In this embodiment or other embodiments, a flow guide opening 1130 is disposed at an end of the molding runner 1110 near the inner side, and the flow guide opening 1130 faces the inner side surface in a flared shape, so as to guide the flow of the rubber extruded by the molding machine.

In this embodiment or other embodiments, the inner core mold 1200 is provided with a mounting post 1220 at the inner side thereof, and the mounting post 1220 is provided with a thread. The inner core die 1200 is mounted and dismounted by using the screw thread, which is simple and convenient.

In this embodiment or other embodiments, an adjusting hole 1230 is formed in the center of the outer end surface of the inner core mold 1200, and the adjusting hole 1230 is in a straight shape or a cross shape, so that the inner core mold 1200 can be further conveniently mounted and dismounted by using a screwdriver.

In this embodiment or other embodiments, the outer circumference of the outer end surface of the inner core mold 1200 is also provided with a protection chamfer 1140 (not shown in the drawings), which further protects the blade of the knife and prevents the blade from being damaged due to the protrusion of the end surface of the inner core mold 1200 out of the outer mold due to installation deviation.

The rubber blank produced by the forming tool has the technical effects that the rubber blank is closer to the shape of a produced workpiece, and the production is convenient; the internal positioning is facilitated, the size of the die is reduced, the one-time forming quantity is increased, and the production cost is reduced; the internal air can be discharged, the probability of air pocket and waste products due to shortage of materials is reduced, and the rejection rate is reduced; the flowing distance of the rubber in the production process can be reduced, and the rejection rate is further reduced.

Example two

As shown in fig. 7 and 8, in the rubber blank molding tool in this embodiment, based on the technical solution in the above embodiment, a diameter of a circle where a cross section of the top end surface of the positioning tooth 1210 is located is larger than a diameter of the molding runner 1110, or the top end surface of the positioning tooth 1210 is a plane.

By the scheme of the embodiment, the parts at two ends of the positioning tooth grooves 2100 of the produced rubber blank 2000 are thinner, so that the protruding parts between the positioning tooth grooves 2100 can fill the positions when being melted, and the flowing distance of rubber at the positions is further reduced; and this setting can further be favorable to the air in the middle of the glue embryo to discharge to further reduce the rejection rate.

Although some specific embodiments of the present invention have been described in detail by way of illustration, it should be understood by those skilled in the art that the above illustration is only for purposes of illustration and is not intended to limit the scope of the invention. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the invention. The scope of the invention is defined by the appended claims.

Claims (7)

1. A novel rubber blank forming tool is characterized by comprising an outer opening die and an inner core die, wherein the outer opening die is annular, an assembly ladder groove is formed in the periphery of the outer opening die, a hole in the middle of the outer opening die is a forming flow channel, and the forming flow channel is circular; the inner core mold and the outer opening mold are arranged concentrically, the outer end face of the inner core mold is located inside the outer opening mold, or the outer end face of the outer opening mold is located on the same plane, the diameter of the inner core mold is smaller than that of the forming flow channel, and a plurality of positioning teeth are uniformly arranged on the peripheral face of the inner core mold.

2. The rubber cement blank molding tool as claimed in claim 1, wherein a protection chamfer is arranged around the outer end of the outer mouth mold.

3. The rubber cement blank molding tool according to claim 1, wherein a flow guide opening is formed in one end, close to the inner side, of the molding flow channel, and the flow guide opening is in a bell-mouth shape and faces towards the inner side face.

4. The rubber cement blank forming tool as claimed in claim 1, wherein a mounting column is provided on the inner side of the inner core mold, and a thread is provided on the mounting column.

5. The rubber blank molding tool according to claim 4, wherein an adjusting hole is formed in the center of the outer end face of the inner core mold, and the adjusting hole is in a straight shape or a cross shape.

6. The rubber blank molding tool according to claim 5, wherein a protection chamfer is also arranged on the outer periphery of the outer end face of the inner core mold.

7. The rubber cement blank molding tool as claimed in claim 1, wherein the diameter of the circle where the cross section of the positioning top end surface is located is larger than the diameter of the molding runner, or the positioning top end surface is a plane.

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