CN108501420B - A solid tire injection molding process - Google Patents

Abstract

The invention discloses a novel solid tire plastic injection process, which includes first extrusion equipment and second extrusion equipment; the first extrusion equipment includes a first injection cylinder, a first rubber material box, a first mold, a first The demoulding oil cylinder; the first injection oil cylinder is connected with the first rubber material box, the inner rubber material box is provided with the inner rubber material, the first rubber material box is connected with the first mold, and the first mold is connected with the first demoulding oil cylinder; The second extrusion equipment includes a second pressure injection oil cylinder, a second rubber material box, a second mold, a third mold, and a second demoulding oil cylinder; the second pressure injection oil cylinder is connected to the second rubber material box, and the second rubber material box is equipped with There is an outer rubber material, the second rubber material box is respectively connected to the second mold and the third mold, and the second mold and the third mold are respectively connected to the second demoulding oil cylinder; the first mold, the second mold, and the third mold are respectively It consists of upper and lower molds of different sizes. The invention is beneficial to improve work efficiency and product quality.

Description

A solid tire injection molding process

technical field

The invention relates to the field of tire injection molding processing, in particular to a solid tire injection molding process.

Background technique

In the production of rubber industry, the production of solid tire blanks usually adopts a composite extrusion process, that is, composite extrusion with a composite extruder. Composite extrusion production process is a common technology in rubber industry production. It can use rubber materials with different formulations and properties according to different performance requirements of products, and produce products that meet various performance requirements of products through composite extrusion equipment.

The composite extrusion method is divided into two types: the external composite method and the internal composite method. At present, the production of solid tire embryos mainly adopts the internal composite method. The internal composite method is also called the composite head extruder method, and the composite extruder A whole solid tire blank (in the form of a round bar) is extruded by two or three extruders through a composite extruder head; the disadvantages of this process are: (1) The composite extruder uses 2-3 extruders The extruder works through the compound extruder head, which consumes a lot of power, requires a large number of personnel, and has low work efficiency; (2) The surface of the embryo extruded by this process is not smooth, there are pores inside the carcass, and the cross-sectional size and weight are not good. (3) The process of extruding solid tire blanks (in the form of round rods) still needs to be cut and jointed manually to realize the blanks in the shape of solid tire tires. When this structure is vulcanized, it is easy to There is a bulging defect at the joint.

Contents of the invention

In order to overcome the technical deficiencies of the existing tire injection molding process, the invention provides a solid tire injection molding process, which is beneficial to improving work efficiency and product quality.

The technical solution adopted by the present invention to solve the technical problem is: a solid tire injection molding process, including the first extrusion equipment and the second extrusion equipment; the first extrusion equipment includes the first pressure injection cylinder, the first rubber material box, the first mold, and the first demoulding oil cylinder; the first injection cylinder is connected to the first rubber material box, the first rubber material box is provided with an inner rubber material, and the first rubber material box is connected to the upper half of the first mold, The lower half of the first mold is connected to the first demoulding cylinder; the second extrusion equipment includes the second injection cylinder, the second rubber box, the second mold, the third mold, and the second demoulding cylinder; the second injection cylinder Connect the second rubber material box, the second rubber material box is provided with an outer rubber material, the second rubber material box is respectively connected to the upper half of the second mold and the upper half of the third mold, the lower half of the second mold and the third mold The lower mold half of the mold is respectively connected to the second demoulding oil cylinder; the first mold, the second mold and the third mold are respectively composed of upper molds and lower molds of different sizes.

The present invention comprises the following steps, step 1: forming the inner layer structure of the tire: the first pressure injection oil cylinder injects the inner layer rubber material in the first rubber material box into the first mold to form the inner layer structure of the tire, and the first ejector The mold oil cylinder realizes demoulding and is manually taken out; Step 2: The upper half of the outer layer of the tire is formed: Put the tire formed in Step 1 into the second mold, and the inner diameter of the lower mold of the second mold is the same as the outer circle size of the inner layer of the tire Same, the inner diameter of the upper mold of the second mold is the same as the outer circle size of the tire outer layer structure, so that a cavity is formed between the tire and the upper mold of the second mold, and the second injection cylinder presses the outer layer in the second rubber box. The rubber material is injected into the cavity in the second mold to form the upper half of the outer layer of the tire, which is demoulded by the second demoulding cylinder and taken out manually; step 3: the inner layer structure and the outer layer formed in step 2 Put the tire on the upper half of the layer into the third mold, the inner diameter of the upper mold and the lower mold of the third mold are the same as the outer circle size of the tire outer layer structure, and place the molded upper half of the tire molded in step 2 on the second mold. In the lower mold of the third mold, a cavity is formed between the tire and the upper mold of the third mold at this time, and the second injection cylinder presses the outer rubber material in the second rubber material box into the cavity in the third mold , the demoulding is realized by the second demoulding oil cylinder and taken out manually to make the tire injection molding.

The beneficial effect of the present invention is that the solid tire injection molding process (1) adopts two low-power extruding equipment, which is beneficial to reduce the use of equipment and reduce the energy consumption of the enterprise; Labor cost; (3) Improve work efficiency and tire output, and reduce product cost as a whole; (4) Since the tire blank produced by this process has no joints, there is no joint bulge; (5) It is conducive to improving the surface quality of tires , making it smoother and improving technical problems such as air holes inside the carcass, section size, weight, etc.

Description of drawings

The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

Fig. 1 is a structural schematic diagram of the first extrusion equipment.

Fig. 2 is a schematic structural view of the second extrusion device.

Fig. 3 is a sectional view of a tire.

Marked in the figure, 1. The first injection cylinder, 2. The first rubber box, 3. The first mold, 4. The first demoulding cylinder, 5. Inner rubber, 6. The second injection cylinder, 7 .Second rubber material box, 8. Second mold, 9. Third mold, 10. Second demoulding oil cylinder, 11. Outer rubber material.

Detailed ways

Referring to Figures 1-3, a solid tire injection molding process includes a first extrusion device and a second extrusion device; the first extrusion device includes a first injection cylinder 1, a first rubber material box 2, a first mold 3. The first demoulding cylinder 4; the first injection cylinder 1 is connected to the first rubber material box 2, the first rubber material box 2 is provided with an inner rubber material 5, and the first rubber material box 2 is connected to the first mold 3 Half-mold, the lower half of the first mold 3 is connected to the first demoulding cylinder 4; the second extrusion equipment includes the second injection cylinder 6, the second rubber box 7, the second mold 8, the third mold 9, the second The demoulding oil cylinder 10; the second injection oil cylinder 6 is connected to the second rubber material box 7, the second rubber material box 7 is provided with an outer rubber material 11, and the second rubber material box 7 is respectively connected to the upper half of the second mold 8 and the The third mold 9 upper half mold, the second mold 8 lower half molds and the third mold 9 lower half molds are respectively connected to the second demoulding cylinder 10; the first mold 3, the second mold 8, and the third mold 9 are respectively made The upper mold of different sizes and the lower mold form; The inner diameter of the upper mold and the lower mold of the first mold 3 is the same, the inner diameter of the upper mold of the second mold 8 is greater than the inner diameter of the lower mold, and the upper mold inner diameter of the third mold 9 The inner diameter of the mold and the lower mold is the same; the inner diameter of the upper mold and the lower mold of the first mold 3 is the same as the lower mold inner diameter of the second mold 8; the upper mold inner diameter of the second mold 8 is the same as the upper mold inner diameter of the third mold 9 The inner diameters of the mold and the lower mold are the same.

In the present invention, the first rubber material box 2 melts the rubber material for the inner layer part structure and stores it in the injection cavity, and the second rubber material box 7 melts the rubber material for the outer layer structure and stores it in the pressure injection chamber. Use the cavity.

The present invention comprises the following steps, step 1: forming the inner layer structure of the tire: the first injection oil cylinder 1 presses and injects the inner layer rubber material 5 in the first rubber material box 2 into the first mold 3 to form the inner layer structure of the tire, The demoulding is realized by the first demoulding oil cylinder 4 and taken out manually; step 2: the upper half of the tire outer layer is formed: the tire formed in step 1 is put into the second mold 8, and the inner diameter of the lower mold of the second mold 8 is the same as The size of the outer circle of the tire inner layer structure is the same, and the upper mold inner diameter of the second mold 8 is the same as the outer circle size of the tire outer layer structure, so that a cavity is formed between the tire and the upper mold of the second mold 8, and the second pressure injection cylinder 6 The outer layer rubber material 11 in the second rubber material box 7 is injected into the cavity in the second mold 8 to form the upper half of the outer layer of the tire, and the demoulding is realized by the second demoulding cylinder 10 and taken out manually; Step 3: Put the tire formed in step 2 with the inner layer structure and the upper half of the outer layer into the third mold 9, the inner diameter of the upper mold and the lower mold of the third mold 9 is the same as the outer circle size of the tire outer layer structure Place the upper half of the tire formed in step 2 in the lower mold of the third mold, at this time a cavity is formed between the tire and the upper mold of the third mold 9, and the second injection cylinder 6 injects the second rubber material The outer layer rubber material 11 in the box 7 is injected into the cavity in the third mold 9, and the second release oil 10 cylinders realize demoulding and take out manually to make the tire pressure injection molding.

In the present invention, while the structure of the upper half of the outer layer of the second tire is formed by injection molding, the structure of the lower half of the first tire is injection molded at the same time. The two processes are carried out at the same time, which is conducive to improving work efficiency, because the upper half The glue of the first half and the second half is exactly the same.

Claims (2)

1. The solid tire injection molding equipment is characterized by comprising a first extrusion device and a second extrusion device; the first extrusion device comprises a first pressure injection oil cylinder (1), a first glue box (2), a first mould (3) and a first demoulding oil cylinder (4); the first pressure injection oil cylinder (1) is connected with a first glue box (2), inner-layer glue (5) is arranged in the first glue box (2), the first glue box (2) is connected with an upper half mould of a first mould (3), and a lower half mould of the first mould (3) is connected with a first demoulding oil cylinder (4); the second extrusion device comprises a second pressure injection oil cylinder (6), a second glue box (7), a second mould (8), a third mould (9) and a second demoulding oil cylinder (10); the second pressure injection oil cylinder (6) is connected with a second glue box (7), an outer layer of glue (11) is arranged in the second glue box (7), the second glue box (7) is respectively connected with an upper half mould of a second mould (8) and an upper half mould of a third mould (9), and a lower half mould of the second mould (8) and a lower half mould of the third mould (9) are respectively connected with a second demoulding oil cylinder (10); the inner diameters of an upper die and a lower die of the first die (3) are the same, the inner diameter of the upper die of the second die (8) is larger than that of the lower die, and the inner diameters of the upper die and the lower die of the third die (9) are the same; the inner diameters of an upper die and a lower die of the first die (3) are the same as the inner diameter of the lower die of the second die (8); the inner diameter of the upper die of the second die (8) is the same as the inner diameters of the upper die and the lower die of the third die (9).

2. The solid tire injection molding process is characterized by comprising the following steps: forming an inner layer structure of the tire: the first pressure injection oil cylinder (1) is used for pressure injection of the inner layer rubber material (5) in the first rubber material box (2) into the first mold (3) to form the inner layer structure of the tire, and the first demolding oil cylinder (4) is used for demolding and manually taking out; step two: forming the upper half part of the outer layer of the tire: placing the tire formed in the step one into a second mold (8), wherein the inner diameter of the lower mold of the second mold (8) is the same as the outer circle of the inner layer structure of the tire, the inner diameter of the upper mold of the second mold (8) is the same as the outer circle of the outer layer structure of the tire, so that a cavity is formed between the tire and the upper mold of the second mold (8), a second pressure injection oil cylinder (6) is used for pressure injection of outer layer rubber (11) in a second rubber material box (7) into the cavity in the second mold (8) to form the upper half part of the outer layer of the tire, and demolding is realized by a second demolding oil cylinder (10) and is manually taken out; step three: and (3) placing the tire formed in the second step and provided with the inner layer structure and the upper half part of the outer layer into a third mold (9), wherein the inner diameter size of the upper mold and the lower mold of the third mold (9) is the same as the outer circle size of the outer layer structure of the tire, placing the formed upper half part of the tire formed in the second step into the lower mold of the third mold (9), forming a cavity between the tire and the upper mold of the third mold (9), pressing and injecting the outer layer rubber material (11) in the second rubber material box (7) into the cavity in the third mold (9) by using a second pressing and injecting oil cylinder (6), realizing demolding by using a second demolding oil cylinder (10) and manually taking out, and pressing and injecting and forming the tire.