CN209999578U

CN209999578U - Rubber forming mechanism

Info

Publication number: CN209999578U
Application number: CN201920703181.2U
Authority: CN
Inventors: 王诗海; 许飞; 周斌
Original assignee: FOSHAN YIZUMI PRECISION MACHINERY Co Ltd
Current assignee: Guangdong Yizhimi Precision Rubber And Plastic Equipment Technology Co ltd
Priority date: 2019-05-16
Filing date: 2019-05-16
Publication date: 2020-01-31
Anticipated expiration: 2029-05-16

Abstract

The utility model discloses an rubber forming mechanism relates to the rubber shaping field, rubber forming mechanism includes the base unit, rubber processing conveying unit sets up on the base unit and includes feed cylinder and screw rod, the end of feed cylinder is equipped with the rubber feed inlet, and end forms into the rubber discharge gate in addition, the screw rod is rotatably coaxial to be set up in the feed cylinder, the rotation driving unit, the drive screw rod is rotatory in order to plasticize the rubber material of rubber feed inlet and carry towards the rubber discharge gate, and the forced lubrication drive unit, the drive screw rod is followed the axial of feed cylinder chamber of feed cylinder is removed in order to export plasticized rubber material from the rubber discharge gate.

Description

Rubber forming mechanism

Technical Field

The utility model relates to a rubber shaping field specifically, relates to kinds of rubber forming mechanism.

Background

The pressure feeding device commonly used in the traditional first-in first-out rubber forming machine is composed of two parts of a plasticizing charging barrel and a pressure feeding charging barrel which are separated, rubber materials are firstly plasticized and fed through the plasticizing charging barrel and a screw rod, namely the rubber materials are conveyed into the pressure feeding charging barrel from a feeding hole, and then the pressure feeding driving device is used for carrying out a pressure feeding forming process, so that the rubber materials in the pressure feeding charging barrel are pressure-fed into a mold cavity. The rubber molding machine with the split charging barrel has a complex structure and high manufacturing cost.

In addition, some of such rubber molding machines have a plasticizing cylinder disposed in a pressure feed cylinder, but because a screw is disposed in the plasticizing cylinder, i.e., the plasticizing cylinder cannot be made small in size, the inner diameter of the pressure feed cylinder for storing material is limited and cannot be made small, and the molding accuracy cannot be achieved when molding light and small products. In some rubber molding machines, the plasticizing cylinder is disposed outside the pressure feed cylinder, and at this time, although the inner diameter of the pressure feed cylinder can be made small, a long useless runner is added, which is not favorable for molding rubber.

SUMMERY OF THE UTILITY MODEL

The above-mentioned defect and not enough to prior art, the utility model provides an kind simple structure is reasonable, the dependable performance, inside runner are short, the feed cylinder internal diameter is little, can realize the FIFO rubber forming mechanism of little forced lubrication volume and high shaping precision.

In order to achieve the purpose, the utility model provides an rubber forming mechanism, the rubber forming mechanism includes the base unit, rubber processing conveying unit, the end of feed cylinder is equipped with the rubber feed inlet, end forms the rubber discharge gate in addition on the base unit, the screw rod rotatably coaxial sets up in the feed cylinder, the rotation drive unit, drive the screw rod rotation with the rubber material plastify of rubber feed inlet and towards the rubber discharge gate is carried, and the forced lubrication drive unit, drive the screw rod along the feed cylinder chamber axial of feed cylinder with the plasticized rubber material from the output of rubber discharge gate.

Optionally, a single compression section is provided on the screw.

, a plurality of rings of oil grooves are formed around the periphery of the barrel, and the oil grooves are filled with heating oil for heating the barrel cavity.

In addition, the screw rod can comprise a screw rod body and a screw rod head detachably connected to the tail end of the screw rod body, a check member for preventing fluid from flowing back is arranged on the outer peripheral wall of the screw rod head, the check member comprises a tail end expanding portion formed at the tail end of the screw rod head, a fixed gasket and a movable check ring, the fixed gasket is sleeved on the screw rod head in an axially spaced mode relative to the tail end expanding portion, the movable check ring is sleeved on the screw rod head in a sleeved mode, and the axial spacing between the tail end expanding portion and the fixed gasket is larger than the axial length of the movable check ring.

In addition, the base unit can comprise a plurality of guide columns, a base, a support and a bearing seat which are sequentially distributed at intervals from bottom to top, and the guide columns extend upwards from the base and sequentially penetrate through the support and the bearing seat; the top of the rubber processing conveying unit is connected to the support, the rotary driving unit is mounted on the bearing seat and connected with and drives the top end of the screw, and the pressure feeding driving unit is arranged to drive the bearing seat to move relative to the support along the guide pillar.

Further , the rotary driving unit comprises a motor installed on the top surface of the bearing seat and a coupler connected with the output shaft of the motor and the top end of the screw rod, the bearing seat is provided with a vertical through bearing hole and a bearing installed in the bearing hole, and the coupler penetrates through the bearing and forms a rotary fit with the bearing.

Optionally, the pressure feed driving unit is a telescopic power cylinder installed between the support and the bearing seat.

In addition, the support and the bearing seat can be rectangular plate-shaped, the base unit comprises four guide columns respectively penetrating through four corners of the support and the bearing seat, the screw rods are arranged in the geometric centers of the four guide columns in parallel, and the telescopic power cylinders are at least two and are symmetrically arranged relative to the geometric centers.

Further , the screw may have a length to diameter ratio of less than 18 and a compression ratio of less than 1.5.

Optionally, the length-diameter ratio of the screw can be 14-16.75, and/or the compression ratio of the screw can be 1.1-1.2.

The utility model discloses a rubber forming mechanism includes base unit, rubber processing conveying unit and forced lubrication drive unit, and wherein, rubber processing conveying unit includes screw rod and collection plastify feed cylinder and forced lubrication feed cylinder in the feed cylinder of the body, and this rubber forming mechanism simple structure is reasonable, the inside runner is short, be suitable for the plastify processing of rubber, and the feed cylinder internal diameter is little, can reach the rubber processing requirement of first-in first-out, little forced lubrication volume and high shaping precision.

Other features and advantages of the present invention will be described in detail in the detailed description which follows.

Drawings

FIG. 1 is a schematic perspective view of rubber molding mechanisms according to embodiments of the present invention;

FIG. 2 is a partial schematic structural view of the rubber molding mechanism of FIG. 1 from another perspective ;

FIG. 3 is a top view of FIG. 2;

FIG. 4 is a cross-sectional view of the rubber molding mechanism of FIG. 2;

fig. 5 is a partially enlarged schematic view of fig. 4.

Description of the reference numerals

1 charging barrel 11 rubber feed inlet

2 screw 21 screw body

22 screw head 221 tail end expanding part

222 fixed washer 223 check ring

3 oil groove 4 guide pillar

5 base 6 support

7 bearing seat and 8 motor

9 shaft coupling 10 bearing

12-nozzle 13 telescopic power cylinder

Detailed Description

In the following detailed description, embodiments of the invention are described, examples of which are illustrated in the accompanying drawings. The embodiments described below by referring to the drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

In the present invention, unless otherwise specified, the use of directional terms such as "upper, lower, top, bottom" and "upper" are generally used with respect to the orientation shown in the drawings or the positional relationship of the components with respect to each other in the vertical, vertical or gravitational direction.

The utility model provides an rubber forming mechanism, as shown in fig. 1-4, this rubber forming mechanism includes base unit, rubber processing conveying unit and rotary driving unit, rubber processing conveying unit sets up on the base unit and includes feed cylinder 1 and screw rod 2, the end of feed cylinder 1 is equipped with rubber feed inlet 11, end forms into the rubber discharge gate in addition, screw rod 2 rotatably coaxial setting is in feed cylinder 1, rotary driving unit drive screw rod 2 rotates in order to plasticize the rubber material of rubber feed inlet 11 and carry towards the rubber discharge gate, pressure feed drive unit drive screw rod 2 is along the axial removal of feed cylinder chamber of feed cylinder 1 in order to export plasticized rubber material from the rubber discharge gate.

The pressure feeding device commonly used in the traditional first-in first-out rubber molding machine is composed of two parts of a plasticizing charging barrel and a pressure feeding charging barrel which are separated, and the rubber molding machine with the separated charging barrel has a complex structure and high manufacturing cost. In addition, some of such rubber molding machines have a plasticizing cylinder disposed in a pressure feed cylinder, but because a screw is disposed in the plasticizing cylinder, i.e., the plasticizing cylinder cannot be made small in size, the inner diameter of the pressure feed cylinder for storing material is limited and cannot be made small, and the molding accuracy cannot be achieved when molding light and small products. In some rubber molding machines, the plasticizing cylinder is arranged outside the pressure feeding cylinder, and although the inner diameter of the pressure feeding cylinder can be made small, a long useless runner is added to influence the molding, which is not favorable for the pressure feeding molding of rubber.

Compare in the complicated split feed cylinder structure of traditional FIFO rubber molding machine, the utility model discloses a rubber molding machine's feed cylinder collection plastify feed cylinder and pressure feed cylinder in the bodies, compact structure is reasonable, has simplified traditional FIFO rubber forming mechanism, and, the utility model discloses a rubber molding machine's inside runner is short, be suitable for the plastify processing of rubber, and the feed cylinder internal diameter is little, control accuracy is high, can reach FIFO, little pressure feed volume and high shaping accuracy's rubber processing requirement.

As shown in FIG. 2, a rubber feed port 11 is arranged at the top of a material barrel 1, a nozzle 12 is arranged at a rubber discharge port of the material barrel 1, rubber materials enter the material barrel 1 from the rubber feed port 11 at the top of the material barrel 1 and are plasticized along with the rotation of a screw 2 and accumulated towards the bottom of the material barrel 1, the screw 2 moves upwards along with the increase of the accumulation amount of the rubber materials, and the rubber materials are fully and uniformly plasticized in the process, when the accumulation amount of the rubber materials reaches a preset pressure feeding amount, a pressure feeding driving unit drives the screw 2 to move axially downwards along a material barrel cavity of the material barrel 1 so as to sequentially output the plasticized rubber materials from the nozzle 12 to a mold cavity, so that the first-in first-out molding processing requirements of the rubber materials are met, and the microstructure of the rubber products is ensured to be uniform .

In alternative embodiments, the screw 2 is provided with a single compression section, and the structure is simple, the processing is easy, and the screw is suitable for the plasticizing processing of rubber.

In addition, when the rubber material is plasticized in the charging barrel 1, in order to control the temperature uniformly and ensure the temperature requirement when the charging barrel 1 stores the material so as to ensure the plasticizing quality of the rubber material, as shown in fig. 4, a plurality of rings of annular oil grooves 3 can be arranged around the periphery of the charging barrel 1, and heating oil liquid for heating the cavity of the charging barrel is introduced into the oil grooves 3.

, in order to improve the forming accuracy, prevent the rubber material from flowing back along the screw groove of the screw 2 during pressure-feed forming and meet the first-in first-out processing forming requirement, as shown in FIG. 5, the screw 2 may include a screw body 21 and a screw head 22 detachably connected to the end of the screw body 21, the outer peripheral wall of the screw head 22 is provided with a check member for preventing the fluid from flowing back, the check member includes a terminal diameter-expanding portion 221 formed at the end of the screw head, a fixed washer 222 fitted on the screw head 22 at an axial interval with respect to the terminal diameter-expanding portion 221, and a movable check ring 223 fitted on the screw head 22, the axial interval between the terminal diameter-expanding portion 221 and the fixed washer 222 is larger than the axial length of the movable check ring 223, the movable check ring 223 is movable up and down between the terminal diameter-expanding portion 221 and the fixed washer 222, when the pressure-feed drive unit drives the screw 2 to pressure-feed the plasticized rubber material, the top end surface of the movable check ring 223 comes into contact with the bottom surface of the fixed washer 222 to form a pressure-feed cavity closed rubber material.

In addition, in order to shorten the flow path length by steps, the nozzle 12 of the cylinder 1 is attached to the tail end of the screw head as much as possible, so that the residual rubber material between two press-feeding processes is reduced every press-feeding processes, the influence on the next press-feeding processes is reduced, and the forming precision of the rubber can be improved.

In alternative embodiments, in order to make the support of the base unit more stable and reliable to further increase the forming accuracy, as shown in fig. 1-4, the base unit may include a plurality of guide posts 4, and a base 5, a support 6 and a bearing seat 7 which are spaced from bottom to top, and the guide posts 4 extend upward from the base 5 and sequentially penetrate the support 6 and the bearing seat 7.

Wherein the top of the rubber processing transport unit is attached to the support 6, i.e. the top of the cartridge 1 is fixedly attached to the support 6 and extends through the support 6. The rotary driving unit is arranged on the bearing seat 7 and connected with the top end of the driving screw 2, the pressure feed driving unit is arranged to drive the bearing seat 7 to move along the guide post 4 relative to the support 6, namely the pressure feed driving unit indirectly drives the screw 2 to axially move in the material barrel cavity by driving the bearing seat 7 to move, and therefore the plasticized rubber material is pressure-fed out.

In addition, the rotary driving unit can comprise a motor 8 and a coupling 9 which are arranged on the top surface of a bearing seat 7, the upper end and the lower end of the coupling 9 are respectively connected with the output shaft of the motor 8 and the top end of the screw rod 2, the bearing seat 7 is provided with a vertical through bearing hole and a bearing 10 which is arranged in the bearing hole, and the coupling 9 penetrates through the bearing 10 and forms rotary fit with the bearing 10. When the rubber molding mechanism works, the motor 8 drives the screw rod 2 to rotate through the output shaft, the coupler 9 and the bearing 10 so as to plasticize and process rubber materials. Wherein the motor 8 may be selected as a hydraulic motor or other rotating electrical machine.

Alternatively, the press-feed drive unit is a telescopic power cylinder 13 mounted between the support 6 and the bearing support 7, the telescopic power cylinder 13 being arranged to drive the bearing support 7 along the guide post 4 relative to the support 6. The telescopic power cylinder 13 may preferably be a cylinder.

, the support 6 and the bearing seat 7 can be rectangular plates, the base unit comprises four guide posts 4 respectively penetrating four corners of the support 6 and the bearing seat 7, the screw 2 is arranged in parallel at the geometric center of the four guide posts 4, and the telescopic power cylinders 13 are at least two and are symmetrically arranged relative to the geometric center.

It can be understood by those skilled in the art that the holder 6 and the bearing seat 7 of the rubber molding mechanism of the present invention are not limited to the rectangular plate shape, but may be, for example, a circular plate shape, a polygonal plate shape, or the like. The number of the guide posts 4 is not limited to four, but may be five, six, etc.

The plasticized rubber has a high viscosity, poor flowability, and, based on the vulcanization temperature limit of the rubber mass, optionally a screw 2 length to diameter ratio of less than 18 and a compression ratio of less than 1.5, compared to most thermoplastics. The length-diameter ratio of the screw 2 is not suitable to be too large, otherwise, the screw 2 is too long, and the rubber material stays for a long time at a high temperature to cause overheating and scorching, which is not favorable for the plasticizing quality of the rubber. The compression ratio of the screw 2 is not too large, otherwise the shearing effect of the screw 2 in the plasticizing process is too strong, so that the rubber material is heated too high to generate scorching, and the plasticizing quality of the rubber is also influenced.

In optional embodiments, in order to further steps to improve the plasticizing capacity of the screw 2 and increase the adaptability of the screw 2 to rubber materials, the length-diameter ratio of the screw 2 can be selected to be 14-16.75, and the compression ratio of the screw 2 can be selected to be 1.1-1.2.

The utility model discloses a rubber molding machine's feed cylinder collection plastify feed cylinder and pressure feed cylinder in the body, compact structure is reasonable, has simplified traditional FIFO rubber forming mechanism, and, the utility model discloses a rubber molding machine's inside runner is short, be suitable for the plastify processing of rubber, and the feed cylinder internal diameter is little, control accuracy is high, can reach FIFO, little pressure feed volume and high shaping accuracy's rubber processing requirement.

The preferred embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited thereto. In the technical idea scope of the present invention, it is possible to provide the technical solution of the present invention with a plurality of simple modifications, including combining each specific technical feature in any suitable manner, and in order to avoid unnecessary repetition, the present invention does not provide additional description for various possible combinations. These simple variations and combinations should also be considered as disclosed in the present invention, all falling within the scope of protection of the present invention.

In the description of the present invention, it is to be understood that the terms "length," "width," "thickness," "upper," "lower," "vertical," "horizontal," "top," "bottom," "radial," "circumferential," and the like are used in the orientation or positional relationship indicated in the drawings for convenience in describing the present invention and to simplify the description, and are not intended to indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present invention.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like shall be construed , for example, as being fixedly connected, detachably connected, or in a body, mechanically connected, electrically connected or communicable with each other, directly connected, indirectly connected through an intermediate medium, connected internally of two elements, or interacting between two elements, unless expressly stated or limited.

Although embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations may be made to the above embodiments by those of ordinary skill in the art without departing from the scope of the present invention.

Claims

1, kinds of rubber forming mechanism, its characterized in that, rubber forming mechanism includes:

a base unit;

the rubber processing and conveying unit is arranged on the base unit and comprises a material barrel (1) and a screw (2), a rubber feeding hole (11) is formed in the end of the material barrel (1), a rubber discharging hole is formed in the other end of the material barrel, and the screw (2) is rotatably and coaxially arranged in the material barrel (1);

the rotary driving unit drives the screw (2) to rotate so as to plasticize the rubber material of the rubber feeding hole (11) and convey the rubber material towards the rubber discharging hole; and

and the pressure feeding driving unit drives the screw (2) to axially move along the barrel cavity of the barrel (1) so as to output the plasticized rubber material from the rubber discharge port.

2. Rubber moulding mechanism according to claim 1, characterized in that a single compression section is provided on the screw (2).

3. The rubber molding mechanism according to claim 1, wherein a plurality of rings of annular oil grooves (3) are arranged around the periphery of the charging barrel (1), and heating oil for heating the cavity of the charging barrel is filled in the oil grooves (3).

4. The rubber molding mechanism according to claim 1, wherein the screw (2) comprises a screw body (21) and a screw head (22) detachably connected to a distal end of the screw body (21), an outer peripheral wall of the screw head (22) is provided with a check member for preventing backflow of a fluid, the check member comprises a distal end enlarged diameter portion (221) formed at a distal end of the screw head, a fixed washer (222) fitted over the screw head (22) at an axial interval with respect to the distal end enlarged diameter portion (221), and a movable check ring (223) fitted over the screw head (22), and the axial interval between the distal end enlarged diameter portion (221) and the fixed washer (222) is greater than the axial length of the movable check ring (223).

5. The rubber moulding mechanism according to claim 1, wherein the base unit comprises a plurality of guide posts (4) and a base (5), a support (6) and a bearing seat (7) which are arranged at intervals from bottom to top, the guide posts (4) extend upwards from the base (5) and sequentially penetrate through the support (6) and the bearing seat (7);

wherein the top of the rubber processing and conveying unit is connected with the support (6), the rotary driving unit is arranged on the bearing seat (7) and is connected with and drives the top end of the screw (2), and the pressure feed driving unit is arranged to drive the bearing seat (7) to move along the guide post (4) relative to the support (6).

6. Rubber moulding mechanism according to claim 5, wherein the rotary drive unit comprises a motor (8) mounted on the top surface of the bearing block (7) and a coupling (9) connecting the output shaft of the motor (8) with the top end of the screw (2), the bearing block (7) is provided with a vertically through bearing hole and a bearing (10) mounted in the bearing hole, the coupling (9) passes through the bearing (10) and forms a rotary fit with the bearing (10).

7. The rubber molding mechanism of claim 5, wherein the force-feed drive unit is a telescopic power cylinder (13) mounted between the pedestal (6) and the bearing housing (7).

8. Rubber moulding mechanism according to claim 7, characterized in that said support (6) and said bearing seat (7) are both rectangular plate-shaped, said base unit comprises four said guide posts (4) passing through four corners of said support (6) and said bearing seat (7), respectively, said screw (2) is arranged in parallel at the geometric center of said four guide posts (4), and said telescopic power cylinders (13) are at least two and are arranged symmetrically with respect to said geometric center.

9. The rubber molding mechanism of any of claims 1-8, wherein the length-diameter ratio of the screw (2) is less than 18 and the compression ratio is less than 1.5.

10. The rubber molding mechanism of claim 9, wherein the length-diameter ratio of the screw (2) is 14 to 16.75, and/or the compression ratio of the screw (2) is 1.1 to 1.2.