CN216993000U

CN216993000U - Mould that pressure gradual change increases gradually

Info

Publication number: CN216993000U
Application number: CN202220785138.7U
Authority: CN
Inventors: 郁秋峰; 郁金喜; 庄佳栋
Original assignee: Zhejiang Wanhui New Material Technology Co ltd
Current assignee: Zhejiang Wanhui New Material Technology Co ltd
Priority date: 2022-04-06
Filing date: 2022-04-06
Publication date: 2022-07-19
Anticipated expiration: 2032-04-06

Abstract

The utility model discloses a die with gradually increased pressure, which comprises: the production mold plate is internally provided with a production cavity which consists of the mold cavity, and the production cavity formed by the shunting pressurization section is of a streamline structure gradually expanded from a feeding end to a discharging end to form a product shape; the utility model solves the problem that the compactness and the internal stress of a product of the special-shaped section obtained by the existing die structure are difficult to meet the requirements on the special-shaped section with complex section, large external dimension and thick wall thickness in the prior art.

Description

Mould that pressure gradual change increases gradually

Technical Field

The embodiment of the utility model relates to the field of adjustment of crawler equipment, in particular to a mold with gradually-changed and gradually-increased pressure.

Background

In the field of plastic molding, extrusion molding is a technological method for continuously extruding plasticized plastic into a mold by utilizing a screw rotating and pressurizing mode, and when the plastic passes through a neck mold with a certain shape, a plastic section bar which is matched with the shape of the neck mold is obtained. For the special-shaped section with complex section, large overall dimension and thick wall thickness, the compactness and the internal stress of the product of the special-shaped section obtained by the conventional die structure hardly meet the requirements.

SUMMERY OF THE UTILITY MODEL

To this end, an embodiment of the present invention provides a die with gradually increasing pressure, including: the production mold plate is provided with a cavity for mold production, the production mold plate is provided with a shunting pressurization section, the shunting pressurization section is far away from one end of the feeding end, a production cavity is arranged inside the shunting pressurization section and consists of the cavity, and the production cavity formed by the shunting pressurization section is of a streamline structure gradually expanded from the feeding end to the discharging end to form a product shape.

In one embodiment, the production template comprises: the device comprises a shunting pressurization section, a stabilizing section, a compression section and a forming section, wherein the shunting pressurization section is arranged at one end, far away from a feeding end, of the connector;

wherein, all be equipped with the die cavity in each section middle part, the die cavity that sets up in each section passes through the locating pin and aligns to through mounting fixed connection, the die cavity of each section has constituteed the production cavity that is used for product production after the alignment.

In one embodiment, the angle between the cavity and the bottom of the production template is 5-30 degrees.

In one embodiment, the inlet end of the connector is circular, the outlet end is a reduced prototype of the product shape, and the angle between the inlet end and the outlet end is 20-30 degrees.

In one embodiment, the flow dividing and pressurizing section is formed by combining a plurality of die plates, and the pressure of the production cavity formed after the combination to the internal material is gradually increased.

In one embodiment, the cavity of the stable section is in a straight transition, and the size and the shape of the feeding end and the discharging end of the cavity of the stable section are the same.

In one embodiment, the compression angle formed by the feeding port and the discharging port of the cavity of the compression section is 40-50 degrees.

In one embodiment, the shape of the cavity of the forming section is the shape of the final product.

In one embodiment, the heating device is arranged around the mold cavities of the molding section and the compression section.

In one embodiment, reinforcing ribs are arranged in the die cavity, and the reinforcing ribs are vertically arranged at the top and the bottom of the die cavity and are arranged at intervals.

The embodiment of the utility model has the following advantages:

the flow dividing and pressurizing section forms the streamline-type cavity, the material flow can flow fully and uniformly along a set fixed route in the whole movement process of the cavity of the flow dividing and pressurizing section, and the phenomenon that the material flow stays for too long time to generate overheating decomposition is avoided while the material flow is uniformly pressurized.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It should be apparent that the drawings in the following description are merely exemplary, and that other embodiments can be derived from the drawings provided by those of ordinary skill in the art without inventive effort.

The structures, ratios, sizes, and the like shown in the present specification are only used for matching with the contents disclosed in the specification, so as to be understood and read by those skilled in the art, and are not used to limit the conditions that the present invention can be implemented, so that the present invention has no technical significance, and any structural modifications, changes in the ratio relationship, or adjustments of the sizes, without affecting the effects and the achievable by the present invention, should still fall within the range that the technical contents disclosed in the present invention can cover.

FIG. 1 is an isometric view of the present invention;

FIG. 2 is a schematic cross-sectional view of the present invention;

FIG. 3 is a schematic view of a first template of the present invention;

FIG. 4 is a schematic view of a second template of the present invention;

FIG. 5 is a schematic view of a fourth template of the present invention;

FIG. 6 is a schematic view of a fifth template of the present invention;

FIG. 7 is a schematic view of a sixth template of the present invention;

FIG. 8 is a schematic view of a seventh template of the present invention;

FIG. 9 is a schematic view of an eighth template of the present invention;

FIG. 10 is a schematic view of a ninth template of the present invention;

FIG. 11 is a schematic view of a tenth template of the present invention;

FIG. 12 is a schematic view of an eleventh template of the present invention;

FIG. 13 is a schematic view of a connector of the present invention;

FIG. 14 is a schematic view of the utility model with the mold cavity at an angle to the bottom of the mold plate;

FIG. 15 is an isometric view of another embodiment of the utility model;

FIG. 16 is a schematic view of the cavity angled from the bottom of the die plate in another embodiment of the utility model.

Detailed Description

The present invention is described in terms of particular embodiments, other advantages and features of the utility model will become apparent to those skilled in the art from the following disclosure, and it is to be understood that the described embodiments are merely exemplary of the utility model and that it is not intended to limit the utility model to the particular embodiments disclosed. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in fig. 1 to 14, a mold with gradually increasing pressure comprises: the device comprises a connector 100 for feeding, a flow dividing and pressurizing section 20 arranged at one end of the connector 100 far away from the feeding end, a stabilizing section 30 arranged at one end of the flow dividing and pressurizing section 20 far away from the connector 100, a compressing section 40 arranged at one end of the stabilizing section 30 far away from the flow dividing and pressurizing section 20, and a forming section 50 arranged at one end of the compressing section 40 far away from the stabilizing section 30;

wherein, all be equipped with the die cavity (refer to reference numeral 12 of 3) in each section middle part, the die cavity that sets up in each section aligns through locating pin 13 to through mounting fixed connection, the die cavity of each section after the alignment has constituteed the production cavity 14 that is used for product production, this production cavity 14's reposition of redundant personnel pressure boost section 20 part presents the streamlined structure that forms the product shape for expanding gradually from the feed end to the discharge end.

Preferably, the fixing member includes: the safety bolts 801 are M20 large bolts and are vertically arranged with each template, and each layer of the template is connected with each other through the safety bolts 801; the lift bolts 802 are disposed on the same side of each form.

Preferably, at least 6 positioning pins 13 for limiting are arranged between the templates.

Referring to fig. 13, the feeding end of the connector 100 is circular, the discharging end is a reduced prototype of the product shape, and the expanded included angle between the feeding end and the discharging end is 20 to 30 °. The connector 100 functions primarily as a transition, and referring to fig. 13, it can be seen that the rear feed opening end is a maximized circle, which can carry more material flow extruded from the barrel end, the material flow has a spiral motion in the barrel, while the connector 100 can primarily change the spiral motion of the material flow into a linear motion, and the outlet has a shape similar to the desired product.

Preferably, the flow dividing and pressurizing section 20 is composed of a sixth template 6, a seventh template 7, an eighth template 8, a ninth template 9, a tenth template 10 and an eleventh template 11, and the pressure of the production cavity 14 formed after the combination is gradually increased to the inner material. The material flow gradually changes from spiral motion to linear motion to obtain the section of the required product, but the material flow needs certain pressure in the process, and as can be seen from fig. 2, the pressure of the material flow is gradually increased in the flow dividing pressurizing section 20, so that the material flow can generate pressure better, and the material flow can be compacted layer by layer gradually, and the product is more compact. With reference to fig. 7-12, the overall pressurizing and shunting section can be visualized more intuitively, the cavity flow channels of the overall pressurizing and shunting section correspond end to end, the cavity of the inlet section is larger than the cavity of the outlet end, the pressure layer increases gradually, and the overall pressurizing and shunting section is a streamline cavity. The structure has the advantages that the material flow can flow fully and uniformly along a set route in the whole moving process, and meanwhile, the phenomenon that the material flow stays for too long time and is subjected to overheating decomposition is avoided.

Referring preferably to fig. 14, the cavity 12 in each die plate is angled at 25 ° to the bottom of each die plate. The smaller the angle, the better the flow is pushed, but the greater the number of templates required for each stage.

Preferably, reinforcing ribs 70 are provided in the mold cavity, and the reinforcing ribs 70 are vertically provided at the top and bottom of the mold cavity at intervals. The provision of the ribs 70 prevents significant deformation of the die plate due to the high die profile material caused by the desired product configuration and the high pressure exerted on the die cavity by the material flow during the flow process, which can result in stress.

Preferably, the stable section 30 is a fifth mold plate 5, a cavity of the fifth mold plate 5 is in straight transition, and the size and the shape of a feeding end and a discharging end of the cavity of the stable section 30 are the same; during the whole extrusion process, the flow extrusion is gradually changed from the initial spiral motion to the linear motion, and from the turbulent flow to the direct flow, and the fifth template 5 has the function of better further realizing the motion, so that the flow is more uniform and stable, and simultaneously, in order to eliminate the flow joint seam generated by the reinforcing ribs 70 shearing the material belt, the flow is mixed for enough time.

More preferably, 4 reinforcing ribs 70 are provided at intervals in the cavity of the

fifth die plate

5, 3 reinforcing ribs 70 are provided at intervals in the cavity of the sixth die plate 6, and 1 reinforcing rib 70 is provided in the cavities of the seventh die plate 7 to the tenth die plate 10.

Preferably, the compression section 40 is a fourth mold plate 4, and a compression angle formed by a feed inlet and a discharge outlet of a cavity of the fourth mold plate 4 is 40-50 °. It is possible to densify the product and eliminate the joint line caused by the reinforcing bars 70.

Preferably, the shape of the cavity of the mold section 50 is the shape of the final product.

It is further preferred that the shaping station 50 is composed of a first template 1, a second template 2 and a third template 3.

The forming section 50 is composed of three templates, the design of the forming part is to ensure that the material has a specified section shape after being extruded, the section shape of the forming section 50 is not the corresponding section shape of the product due to the influence of the physical properties (mainly referring to expansion with heat and contraction with cold) of the plastic, the pressure and the temperature, the two have a certain difference, and due to the particularity of the section of the product, the line speed is slow in the actual production process, and the section of the forming section 50 is scaled to be 1.005-1.008 times of the product by combining the above factors. The secondary die land 50 is longer than the conventional die land 50, which has the advantage that the longer land 50 results in a denser, stronger, and more surface-bright interior of the article

Preferably, heating means are provided around the cavities of the shaping station 50 and the compression station 40. The heating device is a heating rod which is arranged on the first template 1 to the fourth template 4 and is vertically arranged to penetrate through the templates. Because the required extruded product is asymmetric in shape, the distance from the edge of the product to the edge of the die head is greatly different due to the particularity of the product in the whole heating process of the die, the phenomenon of nonuniform heating of the die in the whole heating process is caused, the flow of material flow in the corresponding die cavity is inconsistent due to the result, the material flow cannot synchronously flow out of the die, and the material flow in the die cavity can be better uniformly heated by arranging the heating rod, the time of the whole die head in the heating process can be greatly reduced, and the electricity consumption cost of a manufacturer is saved.

Preferably, the cavity of each template is made of 3Cr17 material, and special parts, such as the die forming section 50, are all subjected to heat treatment to ensure that the hardness of the special parts reaches 28-32HRC, so that the special parts are more wear-resistant and the service life of the die is longer.

Referring to fig. 3, the product produced by the mold is a special-shaped structure with a convex middle part and two horizontally extending sides, so that the corresponding horizontally extending parts of the cavity of the molding section 50 for producing the product are inclined upwards by 1.2 degrees compared with the bottom of the mold plate. The product produced in this way can ensure that the horizontal extension parts of the two sides are horizontal under the self weight of the product.

The working principle of the utility model is as follows:

the connector 100 is connected with a discharge port of the charging barrel, each template and the connector 100 are aligned and limited through a positioning pin 13, and then are fixedly connected through a fixing piece to finish installation;

the material enters the die from the connector 100, the connector 100 mainly functions as a transition, the feeding port end at the tail part is a maximized circle, which can bear more material flow extruded from the end of the material cylinder, the material flow moves spirally in the material cylinder, the connector 100 can primarily change the spiral movement of the material flow into linear movement, the outlet of the connector 100 is in a shape similar to that of a required product, the eleventh template 11 in the shunting pressurization section 20 is fixedly connected with the connector 100, the material flow enters the shunting pressurization section 20 to be compressed for the first time, the pressure of the material flow in the shunting pressurization section 20 is increased in a step-type manner, the material flow can generate pressure better, the material flow can be compacted layer by step, the product is more compact, and the eleventh template 11 to the sixth template 6 of the whole shunting pressurization section 20 are in a streamline-type cavity. The structure has the advantages that the material flow can flow fully and uniformly along a set route in the whole movement process, and meanwhile, the phenomenon that the material flow stays for too long time to generate overheating decomposition is avoided;

the material flow after the first compression enters the stabilizing section 30 (the fifth template 5), so that the material flow can be better changed from turbulent flow into straight flow after the first compression, and meanwhile, in order to eliminate material flow joint seams generated by shearing the material belt by the reinforcing ribs 70, the material flow has enough time for mixing;

the material flow after passing through the stabilization section 30 (the fifth template 5) enters the compression section 40 (the fourth template 4) to be compressed for the second time, so that the product can be further compacted, a joint seam caused by the reinforcing ribs 70 can be eliminated, the compactness and the internal stress of the product can be improved, the material flow flowing out from the compression section 40 finally enters the molding section 50, and the final molding discharging is carried out.

Example 2

Referring to fig. 15 to 16, the difference from the above embodiment is that the cavity 12 in each die plate is angled at 5 ° to the bottom of each die plate.

Preferably, as shown in fig. 15, the number of the divided pressurizing section 20 is increased by 2, the number of the stabilizing section 30 disposed at an end of the divided pressurizing section 20 away from the connector 100 is increased by 2, the number of the compressing section 40 disposed at an end of the stabilizing section 30 away from the divided pressurizing section 20 is increased by 2, and the number of the molding section 50 disposed at an end of the compressing section 40 away from the stabilizing section 30 is increased by 2, compared to example 1.

Although the utility model has been described in detail with respect to the general description and the specific embodiments, it will be apparent to those skilled in the art that modifications and improvements may be made based on the utility model. Accordingly, such modifications and improvements are intended to be within the scope of the utility model as claimed.

Claims

1. A die with a gradual increase in pressure, comprising: the production mold plate is provided with a cavity for mold production, and is characterized in that a shunting pressurization section is arranged in the production mold plate, wherein the feeding end of the shunting pressurization section is far away from the connector, a production cavity is arranged in the shunting pressurization section and consists of the cavity, and the production cavity formed by the shunting pressurization section is of a streamline structure gradually expanded from a feeding end to a discharging end to form a product shape.

2. The die of claim 1, wherein the die comprises: the production template comprises: the device comprises a shunting pressurization section, a stabilizing section, a compression section and a forming section, wherein the shunting pressurization section is arranged at one end, far away from a feeding end, of the connector;

3. The die of claim 1, wherein the die comprises: the angle formed by the cavity and the bottom of the production template is 5-30 degrees.

4. The die of claim 1, wherein the die comprises: the feed end of the connector is circular, the discharge end is a reduced prototype of the product shape, and the expanded included angle between the feed end and the discharge end is 20-30 degrees.

5. The die of claim 1, wherein the die comprises: the flow-dividing pressurizing section is formed by combining a plurality of die plates, and the pressure of a production cavity formed after the combination gradually increases for internal materials.

6. The die of claim 2, wherein the die comprises: the cavity of the stable section is in straight transition, and the size and the shape of the feeding end and the discharging end of the cavity of the stable section are the same.

7. A progressive pressure build-up die as claimed in claim 2, wherein: the compression angle formed by the feed inlet and the discharge outlet of the cavity of the compression section is 40-50 degrees.

8. A progressive pressure build-up die as claimed in claim 2, wherein: the shape of the cavity of the forming section is the shape of the final product.

9. A progressive pressure build-up die as claimed in claim 2, wherein: heating devices are arranged around the cavities of the molding section and the compression section.

10. The die of claim 1, wherein the die comprises: and reinforcing ribs are arranged in the cavity, are vertically arranged at the top and the bottom of the cavity and are arranged at intervals.