CN217803023U

CN217803023U - Rubber injection mold

Info

Publication number: CN217803023U
Application number: CN202221676898.0U
Authority: CN
Inventors: 宗殿瑞; 焦冬梅; 边慧光; 马美琴; 孙建帮; 张亚生
Original assignee: Sino Rubber Technology Co ltd; Qingdao University of Science and Technology
Current assignee: Sino Rubber Technology Co ltd; Qingdao University of Science and Technology
Priority date: 2022-07-01
Filing date: 2022-07-01
Publication date: 2022-11-15
Anticipated expiration: 2032-07-01

Abstract

The utility model belongs to the technical field of test equipment, concretely relates to rubber injection mold, major structure includes last mould and bed die that mutual lock is connected, and go up the core that sets up between mould and the bed die, and be provided with rotatory stopper on last mould and the bed die, it passes through the locating pin lock with the bed die and is connected to go up the mould, the tip of bed die still is provided with the mounting panel, be provided with the injection head on the mounting panel, rotatory stopper is pressed by the pressure disk and is arranged in on mould and the bed die, it still is provided with the bleeder vent on mould and the bed die to go up, be provided with rotatory hole with the center through the pressure disk, the rotatory stopper that the edge was provided with eccentric mouth is pressed and is arranged in the position department that corresponds with the core tip on last mould and bed die, and the position department that corresponds with eccentric mouth sets up the bleeder vent on last mould and the bed die, it makes eccentric mouth skew or the intercommunication with the bleeder vent to rotate rotatory stopper, reach the effect of sealed or ventilating, adopt the first injection mode shaping of injection of sizing material, the inhomogeneous phenomenon of goods wall thickness has been eliminated.

Description

Rubber injection mold

The technical field is as follows:

the utility model belongs to the technical field of test equipment, concretely relates to rubber injection mold can prepare the even rubber bag thin wall goods of wall thickness.

Background art:

the semi-closed cylindrical rubber bag thin-wall product in the prior art mostly adopts a vulcanization molding mode, and the manufacturing process is as follows: firstly, placing a mold on a flat vulcanizing machine for preheating, covering a preformed rubber cylinder on a mold core after the mold is completely and uniformly preheated, and fastening an upper mold and a lower mold together through a positioning pin; then, placing the mould on a flat vulcanizing machine again, tightly pressing the mould together by an upper hot plate and a lower hot plate of the flat vulcanizing machine, and heating and vulcanizing; and finally, opening the upper and lower hot plates of the vulcanizing machine after the set time is reached, and opening the mold to take out the rubber bag thin-wall product. In the process of die assembly, rubber can extrude the middle core, and the core is of a cantilever structure and is longer, so that the extrusion of the rubber on the core can bend the core with one fixed end in a certain direction, so that the gap between the outer die and the core is uneven, and the wall thickness of the formed thin-walled rubber bag product is uneven and cannot be used. For example, chinese patent 202110937286.6 discloses an injection molding device for preventing a core from deforming for a slender tubular plastic product, which includes a core, a front mold and a rear mold, wherein the front mold and the rear mold are correspondingly provided with mold cavities corresponding to the core, the mold cavities of the front mold and the rear mold form a mold cavity with the core when the mold is closed, the front mold is provided with a runner communicated with the mold cavity, the injection molding device further includes a hydraulic core pulling mechanism, the front mold and the rear mold are respectively provided with a plurality of supporting and fixing pins driven by the hydraulic core pulling mechanism to extend and retract, the supporting and fixing pins enter the mold cavity to support the core when extending, and the supporting and fixing pins exit the mold cavity when retracting. Chinese patent 202123329316.X discloses a mold for producing a silica gel product, comprising: the lower die assembly comprises a lower die main body and a core, wherein a core column is integrally connected to the bottom of the core, a first core installation cavity and a core column installation cavity sequentially penetrate through the middle of the lower die main body, the core column and the core column installation cavity are installed in a matched mode, the lower portion of the core is matched with the shape of the first core installation cavity, a first glue injection gap is reserved between the periphery of the core and the inner wall of the first core installation cavity, a high-pressure ventilation channel and an injection molding channel which penetrate through the core are arranged in the middle of the core respectively, a gas inlet used for being connected with compressed gas is arranged at the bottom end of the high-pressure ventilation channel, an upper die assembly corresponding to the upper portion of the lower die assembly comprises an upper die main body, a second core installation cavity is arranged in the middle of the upper die main body, the upper portion of the core is matched with the shape of the second core installation cavity, and a second glue injection gap is reserved between the periphery of the core and the second core installation cavity, wherein the first glue injection gap is communicated with the second glue injection gap, and the top end of the second glue injection channel are communicated with the second glue injection gap respectively. Therefore, a novel rubber injection mold is researched and designed to solve the problem of uneven wall thickness of a rubber bag thin-wall product.

The invention content is as follows:

the utility model aims to overcome the shortcoming that prior art exists, research and development design rubber injection mold through the injection moulding method, obtains the even rubber bag thin-walled goods of wall thickness.

In order to achieve the above object, the utility model relates to a rubber injection mold's major structure includes last mould and bed die that mutual lock is connected, and goes up the core 4 that sets up between mould and the bed die to and be provided with rotatory stopper on last mould and the bed die.

The utility model relates to an upper die passes through the locating pin lock with the bed die and is connected, and the tip of bed die still is provided with the mounting panel, is provided with the injection head on the mounting panel, and rotatory stopper is pressed by the pressure disk and is arranged in on mould and the bed die, still is provided with the bleeder vent on upper die and the bed die.

The position of the injection head of the utility model corresponds to the position of the mold core; the center of the rotating plug is provided with a rotating hole which does not penetrate through the rotating plug, and the edge of the rotating plug is provided with an eccentric port which penetrates through the rotating plug; the position of the air hole corresponds to and is communicated with the position of the eccentric opening.

The utility model relates to a when rubber injection mold used, pour into the sizing material into between mould and the bed die, the sizing material flows under the action of gravity from last to down, and simultaneously, make the air flow downwards, and discharge via bleeder vent and the eccentric mouth that communicates mutually, treat that the sizing material is filled and overflow out after the 10% sizing material of full volume, rotate rotatory stopper, make the skew bleeder vent of eccentric mouth, rotatory stopper plugs up the bleeder vent, compress tightly rotatory stopper through the pressure disk, realize sealedly, continue through injecting the sizing material, form pressure between last mould and bed die, in order to guarantee the compactness of goods.

Compared with the prior art, the utility model, through the pressure disk with the center be provided with rotatory hole, the edge is provided with the rotatory stopper pressure of eccentric mouthful and is arranged in the position department that corresponds with the core tip on upper die and bed die, and set up the bleeder vent in the position department that corresponds with eccentric mouthful on upper die and bed die, rotate rotatory stopper and make eccentric mouthful deviate or communicate with the bleeder vent, reach sealed or the effect of ventilating, adopt the injection head to inject sizing material mode shaping, eliminated because of the extrusion of sizing material to the core causes the uneven phenomenon of product wall thickness that the core is eccentric and leads to; the injection molding machine has the advantages of simple structure, scientific and reliable principle, and capability of processing products in an injection mode, eliminating the influence of gravity on the wall thickness of the products, enabling the wall thickness of the obtained products to be uniform and consistent and meeting the precision requirement.

Description of the drawings:

fig. 1 is an explosion diagram of the main structure of the present invention.

Fig. 2 is an appearance schematic diagram of the main structure of the present invention.

Fig. 3 is a sectional view of the main structure of the present invention.

Fig. 4 is a schematic 3D structure diagram of the rotary plug according to the present invention.

The specific implementation mode is as follows:

the present invention will be further described with reference to the following detailed description in conjunction with the accompanying drawings.

Example 1:

the main structure of the rubber injection mold related to the embodiment comprises an upper mold 1, a lower mold 2, a positioning pin 3, a mold core 4, a mounting plate 5, an injection head 6, a rotary plug 7, a pressure plate 8, a rotary hole 9, an eccentric opening 10 and an air hole 11; the upper die 1 and the lower die 2 of the rectangular plate-shaped structure are connected through the positioning pin 3, a core 4 is arranged between the upper die 1 and the lower die 2, the end part of the lower die 2 is provided with a mounting plate 5 of the rectangular plate-shaped structure, an injection head 6 corresponding to the core 4 is arranged on the mounting plate 5, the positions, corresponding to the end part of the core 4, of the upper die 1 and the lower die 2 are respectively provided with a rotary plug 7, the rotary plugs 7 are pressed on the upper die 1 and the lower die 2 by a pressure plate 8, the center of each rotary plug 7 is provided with a rotary hole 9, the edge of each rotary plug is provided with an eccentric opening 10, and the positions, corresponding to the eccentric openings 10, of the upper die 1 and the lower die 2 are provided with air holes 11.

Example 2:

when the rubber injection mold according to the embodiment is used:

firstly, positioning an upper die 1 and a lower die 2 by a positioning pin 3, and fastening by using a bolt;

then, the rotary plugs 7 are respectively pressed on the upper die 1 and the lower die 2 by a pressure plate 8;

finally, injecting the rubber material between the upper die 1 and the lower die 2 by using an injection head 6 in a vertical injection mode to form the rubber material into a required product 100;

during injection, rubber enters between the upper die 1 and the lower die 2 through the injection head 6 and flows from top to bottom, so that air between the upper die 1 and the lower die 2 flows downwards, the air is discharged through the air holes 11 and the eccentric ports 10 which are communicated with each other, after the rubber fills a gap between the upper die 1 and the lower die 2 and overflows 10% of the rubber in the full volume, the rotary plug 7 is rotated through the rotary hole 9, the eccentric ports 10 deviate from the air holes 11, the air holes 11 are blocked by the rotary plug 7, the pressure plate 8 is screwed down and fixed, the purpose of sealing is achieved, the rubber is continuously injected through the injection head 6, pressure is formed between the upper die 1 and the lower die 2, and the compactness of the product 100 is ensured;

after the product 100 is filled with 200% of water, the ellipsoidal shape of the product 100 is uniform and no deviation occurs, which shows that the wall thickness of each part of the prepared product 100 is consistent and the precision is high.

Claims

1. The utility model provides a rubber injection mold, major structure includes mould, bed die and core, is provided with the core between last mould and the bed die, its characterized in that, goes up the mould and passes through the locating pin with the bed die to be connected, and the tip of bed die is provided with the mounting panel of rectangle platelike structure, is provided with the injection head that corresponds with the core on the mounting panel.

2. A rubber injection mold according to claim 1, wherein a rotary plug is provided at a position corresponding to the end of the core on each of the upper mold and the lower mold.

3. A rubber injection mold according to claim 2, wherein the rotary plug is pressed by a platen against the upper mold and the lower mold.

4. A rubber injection mold according to claim 2 or 3, wherein the rotary plug is provided with a rotary hole at the center and an eccentric port at the edge.

5. A rubber injection mold according to claim 4, wherein air holes are provided at positions corresponding to the eccentric holes on the upper mold and the lower mold.