CN117428996A - Single-component silica gel sealing ring injection molding equipment and method for pipe fitting - Google Patents

Abstract

The invention belongs to the technical field of injection molding equipment, and discloses single-component silica gel sealing ring injection molding equipment for pipe fittings, which comprises a glue injection module, wherein the glue injection module comprises an injection cylinder and a limiting module; the glue injection cylinder is provided with a first glue channel and a first cooling loop, the first cooling loop surrounds the outer side of the first glue channel, and the output end of the injection cylinder is provided with an injection head; the single-component silica gel sealing ring injection molding equipment and the method for the pipe fitting utilize the characteristic that the single-component silica gel can start to react and crosslink and solidify after encountering proper high temperature, so that the sealing ring completes the assembly work of the pipe fitting and the sealing ring after injection molding is carried out in the pipe fitting; the sealing ring of the pipe fitting can be assembled during production, so that self-production and self-sufficiency of a pipe fitting manufacturer on the sealing ring are truly realized, and the production cost of the clamping and pressing type pipe fitting is greatly reduced.

Description

Single-component silica gel sealing ring injection molding equipment and method for pipe fitting

Technical Field

The invention belongs to the technical field of injection molding equipment, and particularly relates to single-component silica gel sealing ring injection molding equipment and method for a pipe fitting.

Background

The pipe fitting is a part for connecting a pipeline into a pipeline, and is a common name of parts which play roles in connection, control, direction change, flow diversion, sealing, support and the like in a pipeline system. The clamping and pressing type pipe fitting is often applied to pipeline connection of drinking water, tap water, natural gas, household cold and hot water, medical gas, fire protection and the like by virtue of the characteristics of leakage prevention, pull-out resistance, vibration resistance, high pressure resistance and the like; the clamping and pressing type pipe fitting is a socket pipe fitting connecting pipeline with a sealing ring, a thin-wall stainless steel pipe is inserted into a socket of the clamping and pressing type pipe fitting, the stainless steel pipe is fixed in the pipe fitting by a special clamping and pressing tool, the section surface of the clamping and pressing part is hexagonal, and the sealing ring carried by the clamping and pressing type pipe fitting is remained between the stainless steel pipe and the pipe fitting.

In the existing production process of the clamping and pressing type pipe fitting, the pipe body and the sealing ring are produced by different manufacturers, the pipe body is assembled uniformly after the sealing ring is purchased by the manufacturers of the pipe body, and the following problems occur in the production process of the clamping and pressing type pipe fitting: after the purchase of one sealing ring, the sealing ring is required to be transported from a sealing ring manufacturer to a pipe body manufacturer, and the transportation cost brought by the process can be calculated into the production cost of the clamping and pressing pipe fitting, so that the production cost of the clamping and pressing pipe fitting is higher; secondly, the subsequent assembly problem of the sealing ring is that each clamping and pressing type pipe fitting needs to be assembled with the sealing ring, so that the manual assembly cost of the clamping and pressing type pipe fitting is high, and the production cost of the clamping and pressing type pipe fitting is high again.

When the problem of the transportation cost of the sealing ring is faced, part of manufacturers can achieve the purposes of self-production and self-sufficiency by introducing a sealing ring production technology and production equipment; however, the introduction of the related technology of the sealing ring has the disadvantages of higher production cost of a die, equipment, labor and the like. In addition, when the problem of the manual assembly cost of the sealing ring is faced, part of manufacturers can achieve the purposes of rapid assembly and saving the manual assembly cost by introducing sealing ring assembly equipment. In order to solve the problems of transportation cost and manual assembly cost, manufacturers are required to introduce production equipment and assembly equipment of the sealing ring together; the site requirements of such equipment and the introduction of the relevant technicians can have a serious impact on the capital of the manufacturer.

Disclosure of Invention

In view of the above, the present invention aims to provide a single-component silicone gasket injection molding apparatus and method for pipe fittings, which can solve the above-mentioned problems of the prior art.

In order to solve the technical problems, the technical scheme of the invention is as follows: the single-component silica gel sealing ring injection molding equipment for the pipe fitting comprises a glue injection module, wherein the glue injection module comprises an injection oil cylinder and a limiting module;

the glue injection cylinder is provided with a first glue channel and a first cooling loop, the first cooling loop surrounds the outer side of the first glue channel, and the output end of the injection cylinder is provided with an injection head;

the limiting module comprises an upper module, a lower module and a heating body, wherein the upper module is provided with a second cooling loop, the lower module is provided with a third cooling loop, the upper module and the lower module are provided with grooves, and the grooves are jointed with the upper module and the lower module to form a cavity for limiting and fixing the pipe fitting; the upper module and the lower module are respectively provided with a corresponding driving oil cylinder;

the inside of injection head has second colloid passageway, is provided with first elastic component and second elastic component on the outer wall to the arc wall has been seted up at the middle part of outer wall, second colloid passageway with first colloid passageway is linked together and is formed the injection passageway, and the pan feeding mouth of this injection passageway sets up on the penetrate the packing element of injection hydro-cylinder, the discharge gate sets up in the arc wall.

Preferably, the first elastic member and the second elastic member are provided with an arc surface at one side close to the arc groove, and an arc is formed between the arc surface and the arc groove.

Preferably, the two ends of the injection head are respectively a connecting end and an inserting end, the inside of the injection head is also provided with a conducting channel, the outer wall of the injection head is also provided with a limiting groove and a sliding groove, the inside of the sliding groove is also provided with a sliding block, the limiting groove and the sliding groove are positioned on two sides of the arc-shaped groove, the limiting groove is close to the connecting end, and the sliding groove is close to the inserting end; the first elastic piece is arranged in the limiting groove, the second elastic piece is arranged in the sliding groove, and the second elastic piece is movably arranged on the sliding block.

Further, the sliding block is arranged in a table body, the top surface of the sliding block faces the arc-shaped groove, and the surface of the second elastic piece, which is contacted with the sliding block, is obliquely arranged; the top surface of the sliding block is provided with a guide groove, the inside of the sliding groove is provided with a guide block, and the guide block is matched with the guide groove.

Further, one end of the conduction channel is communicated with the sliding groove, the other end of the conduction channel is communicated with the side wall of the connecting end, the two ends of the conduction channel are respectively provided with a first piston and a second piston, and liquid is filled between the pistons at the two ends; a connecting rod is arranged between the piston I near the chute and the sliding block, and a transmission rod is arranged on the piston II near the side wall of the connecting end; the side wall of the connecting end is provided with a supporting frame, the supporting frame is provided with a lever, one end of the lever is connected with a transmission rod, the other end of the lever is connected with a limiting module, and the connecting positions are all universal joints.

Preferably, the insertion end of the injection head is in a cone shape, the heating elements are arranged in the upper module and the lower module and are distributed on the outer side of the pipe fitting in a ring shape, and the second cooling loop and the third cooling loop are positioned on the outer side of the heating elements.

Preferably, the injection cylinder and the limiting module are arranged on an operation table, and the operation table is also provided with a positioning clamp, a control panel and a code sprayer; the positioning fixture comprises a transverse sliding table, a longitudinal sliding table and a pipe fitting fixing head, wherein the longitudinal sliding table is arranged on a moving block of the transverse sliding table, and the pipe fitting fixing head is arranged on the moving block of the longitudinal sliding table; the code sprayer is positioned at the tail end of the transverse sliding table.

Preferably, the device further comprises a cooling module and a gel pumping module, wherein the cooling module is provided with a cold water machine which is respectively communicated with the first cooling loop, the second cooling loop and the third cooling loop, and the gel pumping module is used for storing and metering single-component silica gel.

Further, the glue pumping module comprises a mounting frame and a control cabinet, a charging basket is arranged at the bottom end of the mounting frame, a glue pumping cylinder is arranged at the top end of the mounting frame and is supported by a glue pumping cylinder column, a pressing tray is arranged in the charging basket, an exhaust port is arranged on the pressing tray, and the opening and the closing of the exhaust port are controlled by an exhaust valve; the output end of the glue pumping cylinder is provided with a meter, the meter is arranged on the pressing disc, a feeding port of the meter is communicated with the inside of the charging basket from the pressing disc, and a discharging port of the meter is communicated with a feeding port of the injection channel through a pipe fitting.

The single-component silica gel sealing ring injection molding method for the pipe adopts the single-component silica gel sealing ring injection molding equipment for the pipe, which is mentioned in the technical proposal,

before injection, setting the temperature of the cooling module at 18 ℃, starting a heating element to enable the temperature of the limiting module to be stabilized at 130 ℃, and updating the date and the content of the code sprayer;

placing the pipe fitting on a pipe fitting fixing head, and controlling the pipe fitting to be inserted into an injection head through a transverse sliding table and a longitudinal sliding table;

the upper module and the lower module are controlled to be close by the driving oil cylinder, and the pipe is fixed; with the movement of the upper module and the lower module, the piston of the conduction channel can move along with the incompressible characteristic of the liquid under the action of the lever and the transmission rod;

along with the closing of the upper module and the lower module, the second piston moves towards the two sides of the connecting end, the second piston moves towards the connecting end at a moment, and the sliding block is driven to move towards the connecting end through the connecting rod;

the second elastic piece is propped up and lifted upwards along with the movement of the sliding block to the connecting end;

when the upper module and the lower module are completely attached, a closed space is formed among the pipe fitting, the first elastic piece, the second elastic piece and the arc-shaped groove, and the glue pumping module and the injection cylinder are started to perform seal ring injection molding;

after the sealing ring is solidified, the driving oil cylinder controls the upper module to be separated from the lower module, the second piston moves towards the center of the connecting end, the second piston moves towards the inserting end for a while, and the connecting rod drives the sliding block to move towards the inserting end; the second elastic piece is retracted and lowered downwards, so that the sealing ring and the pipe fitting after injection molding can be simultaneously demolded;

after demoulding, the sealing ring is positioned in the pipe fitting.

The technical effects of the invention are mainly as follows: the single-component silica gel sealing ring injection molding equipment and the method for the pipe fitting utilize the characteristic that the single-component silica gel can start to react and crosslink and solidify after encountering proper high temperature, so that the sealing ring completes the assembly work of the pipe fitting and the sealing ring after injection molding is carried out in the pipe fitting; the sealing ring of the pipe fitting can be assembled during production, so that self-production and self-sufficiency of a pipe fitting manufacturer on the sealing ring are truly realized, and the production cost of the clamping and pressing type pipe fitting is greatly reduced.

The high-temperature crosslinking and solidifying of the single-component silica gel is adopted, so that the injection material flowing out of the discharge port of the injection channel is crosslinked and solidified under the condition that the temperature reaches, the injection material in the injection channel can be kept continuously for liquid because the temperature can not reach the crosslinking and solidifying requirement, the problems of difficult demolding and blockage of the discharge port caused by solidification of the injection material of the discharge port in the cooling and forming process are avoided, and the injection material in the injection channel can be prevented from being solidified in a mode of being far away from a heating body after the upper module and the lower module are separated, so that the blockage of the discharge port of the injection channel is avoided.

Drawings

FIG. 1 is a block diagram of a one-component silicone gasket injection molding apparatus for pipe fittings according to the present invention;

FIG. 2 is a top view of a one-component silicone gasket injection molding apparatus for pipe fittings of the present invention;

FIG. 3 is a block diagram of the glue injection module of FIG. 1;

FIG. 4 is a top view of the glue injection module of FIG. 1;

FIG. 5 is a diagram showing the structure of the injection cylinder, the limit module and the injection head in FIG. 3;

fig. 6 is an enlarged view of a portion a in fig. 5;

FIG. 7 is a diagram showing a structure of the limit module and the injector head in FIG. 3;

FIG. 8 is a block diagram of the limit module of FIG. 3;

FIG. 9 is an exploded view of the limit module of FIG. 3;

FIG. 10 is a block diagram of the injector head of FIG. 7;

FIG. 11 is a cross-sectional view of the structure of the injector head of FIG. 7;

FIG. 12 is a rear view of the injector head of FIG. 7 in semi-section;

FIG. 13 is a block diagram of the positioning fixture of FIG. 3;

FIG. 14 is a block diagram of the glue pump module of FIG. 1;

FIG. 15 is a cross-sectional view of the adhesive pumping module of FIG. 1;

in the figure: 1. a glue injection module; 11. an operation table;

12 injection ram, 121. First gel channel, 122. First cooling circuit;

13. the device comprises a limiting module, an upper module, a lower module, a heating element, a second cooling loop, a third cooling loop, a groove and a driving oil cylinder, wherein the limiting module comprises a limiting module, an upper module, a lower module, a heating element and a driving oil cylinder;

14. the injection head comprises an injection head body, a connecting end, an inserting end, a second colloid channel, an arc-shaped groove, a limiting groove and a chute, wherein the injection head body comprises an injection head body, a connecting end and an inserting end; 1471. a first resilient member 1472, a second resilient member 1473, an arcuate surface 1474, a slider 1475, a guide groove 1476, and a guide block; 148. conduction channel 1481, piston one, 1482, piston two, 1483, connecting rod, 1484, transmission rod, 1485, support frame, 1486, lever;

15. the positioning clamp 151, the transverse sliding table 152, the longitudinal sliding table 153 and the pipe fitting fixing head;

16. a control panel; 17. a code spraying device;

2. a cooling module 21. A water chiller; 3. the device comprises a glue pumping module, a mounting frame, a control cabinet, a charging basket, a glue pumping cylinder column, a material pressing disc, an air outlet and a meter, wherein the glue pumping module, the mounting frame, the control cabinet, the charging basket, the glue pumping cylinder, the material pumping cylinder column, the material pressing disc, the air outlet and the meter are arranged; 4. a pipe fitting;

n1. an inlet of the first cooling circuit 122, m1 an outlet of the first cooling circuit 122; n2. an inlet of the second cooling circuit 134, m2. an outlet of the second cooling circuit 134; n3. inlet of the third cooling circuit 135, m3 outlet of the third cooling circuit 135; and N4, a feed inlet of the injection channel and a discharge outlet of the M4. injection channel.

Detailed Description

The following detailed description of the invention is provided in connection with the accompanying drawings to facilitate understanding and grasping of the technical scheme of the invention.

In this embodiment, it should be understood that the directions or positional relationships indicated by the terms "middle", "upper", "lower", "top", "right", "left", "upper", "back", "middle", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of description of the present invention, and do not indicate or imply that the apparatus or elements referred to must have a specific direction, be configured and operated in a specific direction, and thus should not be construed as limiting the present invention.

In this embodiment, if not specifically described, the members may be connected or fixed by bolts, pins, or the like, which are commonly used in the prior art, and therefore, the details thereof will not be described in this embodiment.

The single-component silica gel sealing ring injection molding equipment for the pipe fitting uses single-component silica gel as an injection material, and has the following characteristics: one-component silica gels are formulated with the addition of latent curing agents which typically react to crosslink and cure upon exposure to suitable high temperatures or suitable water molecules, thus eliminating the need to blend in adhesives or curing agents prior to use and also allowing them to set.

By adopting the single-component silica gel as the injection material, the molding equipment does not need to heat and melt the injection material before injection and cooling molding, so that the energy consumption during the production of the sealing ring is reduced.

Example 1

Referring to fig. 1-15, the single-component silicone gasket injection molding device for pipe fitting comprises a glue injection module 1, referring to fig. 5 and 6, the glue injection module 1 comprises an injection cylinder 12 and a limiting module 13; the glue injection cylinder of the injection cylinder 12 is provided with a first glue channel 121 and a first cooling loop 122, the first cooling loop 122 surrounds the outer side of the first glue channel 121, and the output end of the injection cylinder 12 is provided with an injection head 14; the pipe fitting 4 is placed on the injection head 14, injection molding equipment can perform injection molding of the sealing ring in the pipe fitting 4 through matching of the injection cylinder 12 and the injection head 14, a pipe fitting 4 manufacturer can realize assembly after the production of the sealing ring is completed, the problems of transportation cost and labor assembly cost in production of the clamping and pressing pipe fitting are solved, the problem that production equipment and assembly equipment of the sealing ring can be solved only by the pipe fitting 4 manufacturer when the sealing ring is required to be introduced is solved through the sealing ring injection molding equipment, and the production cost of production of the clamping and pressing pipe fitting is reduced. Moreover, the adverse factors of the production mould of a pipe fitting 4 manufacturer in the process of producing the sealing ring are eliminated by the injection molding mode in the pipe fitting 4. The injection head 14 has a second colloid channel 143 inside, a first elastic member 1471 and a second elastic member 1472 are arranged on the outer wall, an arc groove 144 is formed in the middle of the outer wall, and the second colloid channel 143 is communicated with the first colloid channel 121 to form an injection channel; the injection channel formed by the first colloid channel 121 and the second colloid channel 143 allows the injection cylinder 12 and the injection head 14 to perform injection molding of the sealing ring into the pipe 4. The feed inlet of the injection channel is arranged on the rubber injection cylinder of the injection cylinder 12, the discharge outlet of the injection channel is arranged in the arc-shaped groove 144, and the discharge outlet of the injection channel is close to the upper module 131; the arc groove 144 can play a role in guiding the flow of the injection material during injection of the sealing ring, and the arrangement of the first elastic piece 1471 and the second elastic piece 1472 can enable the pipe fitting 4 and the injection head 14 to form a sealing space, so that smooth injection of the sealing ring is ensured.

Referring to fig. 5, 8 and 9, the limiting module 13 includes an upper module 131, a lower module 132 and a heating body 133, the upper module 131 is provided with a second cooling circuit 134, the lower module 132 is provided with a third cooling circuit 135, the upper module 131 and the lower module 132 are provided with grooves 136, and the grooves 136 are attached to the upper module 131 and the lower module 132 to form a chamber for limiting and fixing the pipe fitting 4; the upper module 131 and the lower module 132 are respectively provided with a corresponding driving oil cylinder 137; the driving cylinder 137 simply controls the upper module 131 or the lower module 132 to perform the up-down height adjustment, and the upper module 131 and the lower module 132 are provided with the driving cylinder 137 which individually controls the up-down height adjustment thereof, which is not shown in detail in the drawings. Specifically, the heating element 133 is configured to allow the single-component silicone gel of the injection material to be rapidly crosslinked and cured after the injection is completed. The corresponding driving oil cylinders 137 are arranged to control the attachment and detachment of the upper module 131 and the lower module 132, and when the upper module and the lower module are attached, the pipe fitting 4 can be firmly fixed in the injection process of the sealing ring, so that the injection molding quality of the sealing ring is improved; when in separation, the sealing ring can be demolded along with the pipe fitting 4 after solidification, the heating body 133 can be driven to be far away from the injection head 14, the condition that the injection material in the injection head 14 is solidified and blocked is avoided, and the failure rate of injection molding equipment is reduced. By adopting the injection molding mode of high-temperature cross-linking and solidifying of single-component silica gel, the injection material flowing out of the discharge port of the injection channel is cross-linked and solidified under the condition that the temperature reaches, the injection material in the injection channel can be kept in liquid due to the fact that the temperature can not reach the cross-linking and solidifying requirement, the problems of difficult demolding and blockage of the discharge port caused by solidification of the injection material of the discharge port in the cooling molding process are avoided, and the injection material solidification in the injection channel can be prevented in a mode of being far away from the heating body 133 after the upper module 131 and the lower module 132 are separated, so that the blockage of the discharge port of the injection channel is avoided.

The insertion end 142 of the injection head 14 is provided with a cone, and the insertion end 142 of the cone can play a guiding role when the pipe fitting 4 is inserted into the injection head 14, so that the injection assembly of the pipe fitting 4 can be more convenient. The heating body 133 is arranged inside the upper module 131 and the lower module 132 and is annularly distributed on the outer side of the pipe fitting, and the heating body 133 which is annularly distributed can provide heat for the pipe fitting 4 more stably, so that the injection molding quality of the sealing ring is improved. The second cooling circuit 134 and the third cooling circuit 135 are located outside the heating element 133; the cooling circuit is arranged outside the heating body 133, so that the temperature can reach the crosslinking solidification requirement of the injection material while the temperature of the limiting module 13 is stabilized.

Referring to fig. 1 and 2, the cooling device further comprises a cooling module 2 and a glue pumping module 3, wherein the cooling module 2 is provided with a water chiller 21, and the water chiller 21 arranged in the cooling module 2 can be replaced by any device capable of reducing the temperature. The cold water machine 21 is respectively communicated with the first cooling circuit 122, the second cooling circuit 134 and the third cooling circuit 135, and the gel pumping module 3 is used for storing and metering single-component silica gel. Specifically, the cooling module 2 is arranged to connect with the limiting module 13 and the cooling circuit in the injection cylinder 12, wherein the first cooling circuit 122 on the injection cylinder 12 can provide a low-temperature environment for the injection material of the injection channel, so that the probability of high-temperature crosslinking and solidification of the injection material in the injection channel is reduced; the second cooling circuit 134 and the third cooling circuit 135 on the limiting module 13 can be matched with the heating body 133, so that the temperatures of the upper module 131 and the lower module 132 in the limiting module 13 can be kept in a stable range, and the sealing ring can be subjected to rapid injection molding.

Referring to fig. 14 and 15, the glue pumping module 3 includes a mounting frame 31 and a control cabinet 32, a material barrel 33 is disposed at the bottom end of the mounting frame 31, a glue pumping cylinder 34 is disposed at the top end of the mounting frame and supported by a glue pumping cylinder column 35, a material pressing disc 36 is disposed in the material barrel 33, and the material barrel 33 is connected with the material pressing disc 36 by a piston. The material pressing disc 36 is provided with an air outlet 37, and the air outlet 37 is controlled to open and close by an air outlet valve; the output end of the glue pumping cylinder 34 is provided with a counter 38, and the counter 38 can be arranged with the control cabinet 32 so as to accurately meter the sealing ring during injection, so that the injection molding quality of the sealing ring is better. The metering device 38 is arranged on the material pressing disc 36, the material inlet of the metering device 38 is communicated with the material pressing disc 36 into the material barrel 33, and the material outlet is communicated with the material inlet of the injection channel through the pipe fitting 4. Specifically, at the beginning, the exhaust valve of the air vent 37 on the material pressing disc 36 is opened, the material pressing disc 36 is pressed down through the glue pumping cylinder 34 to compress the injection material, when glue flows out of the air vent 37, the glue pumping cylinder 34 stops pressing down the material pressing disc 36, and after the exhaust valve of the air vent 37 on the material pressing disc 36 is closed, the glue pumping module 3 is in a working state. When the injection materials in the material barrel 33 are used up and the material is needed to be added, an exhaust valve on the material pressing disc 36 for controlling the opening and closing of the exhaust port 37 is opened, the material pressing disc 36 is lifted up through the glue pumping cylinder 34, the glue pumping cylinder 34 and the material pressing disc 36 are lifted up through the glue pumping cylinder column 35, and the material pressing disc 36 is led out of the material barrel 33; after the injection material in the charging basket 33 is added, the pressing plate 36 is pressed down through the glue pumping cylinder 34 and the glue pumping cylinder column 35.

Referring to fig. 6 and 10, the first resilient member 1471 and the second resilient member 1472 each have an arc surface 1473 on a side adjacent to the arc groove 144, and the arc surface 1473 forms an arc with the arc groove 144. The arc surfaces 1473 are arranged on the first elastic piece 1471 and the second elastic piece 1472, so that an arc is formed between the arc surfaces 1473 and the arc grooves 144, and the injection molding materials of the sealing ring can be improved; the arcuate surface 1473 of the first resilient member 1471 may also provide a guide for the tubing 4 when inserted into the injector head 14, allowing for easier injection assembly of the tubing 4.

Referring to fig. 7, 10, 11, and 12, two ends of the injection head 14 are a connection end 141 and an insertion end 142, a conductive channel 148 is further provided in the injection head 14, a limiting slot 145 and a sliding slot 146 are further provided on the outer wall, four conductive channels 148 distributed circumferentially are provided in the middle of the injection head 14, and the four conductive channels 148 are communicated by an annular pipe at the connection end 141 of the injection head 14 and guide to the upper and lower ends of the connection end 141, as shown in fig. 7 for details. One end of the conducting channel 148 is communicated with the sliding groove 146, the other end is communicated with the side wall of the connecting end 141, two ends of the conducting channel 148 are respectively provided with a first piston 1481 and a second piston 1482, and liquid is filled between the pistons at the two ends; the pistons in the four conducting channels 148 in the middle of the injection head 14 are a piston one 1481, the pistons at the upper end and the lower end of the connecting end 141 are a piston two 1482, and the liquid filled between the piston one 1481 and the piston two 1482 can be water; the liquid between the pistons not only can conduct and control the movement of the first piston 1481 and the second piston 1482, but also can effectively balance the internal heat of the injection head 14, and avoid the condition that the injection material in the injection channel is crosslinked and solidified due to the local high temperature of the injection head 14.

A sliding block 1474 is further arranged in the sliding groove 146, the limiting groove 145 and the sliding groove 146 are positioned on two sides of the arc-shaped groove 144, the limiting groove 145 is close to the connecting end 141, and the sliding groove 146 is close to the inserting end 142; the first elastic member 1471 is disposed in the limiting groove 145, and the first elastic member 1471 is sleeved through the limiting groove 145, instead of fixing the first elastic member 1471 on the injection head 14, so that the first elastic member 1471 can be replaced in time after being damaged, and the operation and maintenance costs of the device are reduced while the injection molding quality of the sealing ring is ensured. The second elastic member 1472 is disposed in the chute 146, and the second elastic member 1472 is movably disposed on the slider 1474. A connecting rod 1483 is arranged between the piston one 1481 near the chute 146 and the slide block 1474, and a transmission rod 1484 is arranged on the piston two 1482 near the side wall of the connecting end 141; the side wall of the connecting end 141 is provided with a supporting frame 1485, the supporting frame 1485 is provided with a lever 1486, one end of the lever 1486 is connected with a transmission rod 1484, the other end is connected with the limiting module 13, and the joints are all universal joints. Through the action of link 1483, piston one 1481 is able to translate slide 1474; the action of the support frame 1485, lever 1486 and drive rod 1484 allows the piston two 1482 to move in opposite directions as either the upper module 131 or the lower module 132 moves. The sliding block 1474 is arranged in a table body, the top surface of the sliding block 147faces the arc-shaped groove 144, and the surface of the second elastic piece 1472, which is contacted with the sliding block 1474, is obliquely arranged; the slider 1474 cooperates with the second elastic member 1472 to raise and lower the second elastic member 1472.

Specifically, by virtue of the incompressible nature of the fluid and the action of support 1485, lever 1486 and drive rod 1484, piston one 1481 and piston two 1482 are able to move with the movement of upper module 131 and lower module 132, allowing slide 1474 to move under the action of link 1483 and piston one 1481. When the upper module 131 and the lower module 132 are close together, the piston two 1482 moves towards both sides of the connecting end 141, the piston one 1481 moves towards the connecting end 141, and the slide 1474 is driven to move towards the connecting end 141; when the upper module 131 and the lower module 132 are moved away from each other, the piston two 1482 moves toward the center of the connecting end 141, and the piston one 1481 moves toward the insertion end 142, which in turn moves the slider 1474 toward the insertion end 142. The upward lifting and the downward lowering of the second elastic piece 1472 are controlled by the movement of the sliding block 1474, and the upward lifting and the downward lowering of the second elastic piece 1472 are realized by the limit of the sliding block 1474 and the material property of the second elastic piece 1472; when the second elastic piece 1472 is lifted upwards, the second elastic piece 1472 can be matched with the pipe fitting 4, the injection head 14 and the first elastic piece 1471 to form a closed space for injection molding of the sealing ring; when the second resilient member 1472 is lowered downwardly, the second resilient member 1472 can be fully received in the chute 146 to facilitate rapid demolding after injection molding of the seal ring and rapid initial insertion of the tube 4.

The top surface of the sliding block 1474 is provided with a guide groove 1475, the inside of the sliding groove 146 is provided with a guide block 1476, and the guide block 1476 is matched with the guide groove 1475; the guide block 1476 can play a role of a reinforcing rib between the chute 146 and the arc-shaped groove 144, so that the structural stability of the injection head 14 is improved; the situation that the two elastic pieces are completely separated from the sliding block 1474 can be prevented when the two elastic pieces are lowered downwards; the rotation of the sliding block 1474 can be restrained, so that the injection molding of the sealing ring can be stably performed; additionally, the guide blocks 1476 are provided to provide sufficient structural support for the placement of the second gel passageway 143.

Referring to fig. 2, 3 and 13, the injection cylinder 12 and the limit module 13 are arranged on the operation table 11, and the operation table 11 is also provided with a positioning clamp 15, a control panel 16 and a code sprayer 17; the code spraying device 17 can be arranged to spray codes of production date and production batch after the pipe fitting 4 is subjected to internal injection molding of the sealing ring, so that quality detection in the subsequent production process can be traced back. The control panel 16 is arranged to be matched with the code sprayer 17, so that the code sprayer 17 can modify the production date and production batch conveniently; the injection molding device can also link the injection molding module 1, the cooling module 2 and the glue pumping module 3 so as to improve the injection molding quality and the production efficiency of the injection molding device. The positioning clamp 15 can enable the operation of injection molding and code spraying of the sealing ring of the pipe fitting 4 to realize automatic operation, so that the use difficulty of injection molding equipment is reduced; moreover, the accurate control of the injection molding time of the sealing ring can be realized through the cooperation of the positioning clamp 15 and the control panel 16, and the injection molding quality and the production efficiency of the sealing ring are improved. The positioning fixture 15 includes a traverse sliding table 151, a longitudinal sliding table 152 and a pipe fitting fixing head 153, where the traverse sliding table 151 and the longitudinal sliding table 152 are simplified in fig. 13; the longitudinal moving sliding table 152 is arranged on a moving block of the transverse moving sliding table 151, and the pipe fitting fixing head 153 is arranged on the moving block of the longitudinal moving sliding table 152; the code sprayer 17 is located at the tail end of the traversing sliding table 151.

Example two

The tube 4 was injection molded using a one-component silicone gasket, using the one-component silicone gasket injection molding apparatus for tube mentioned in example 1,

before injection, setting the temperature of the cooling module 2 at 18 ℃, starting the heating body 133 to enable the temperature of the limiting module 13 to be stabilized at 130 ℃, and updating the date and the content of the code sprayer 17; the temperature setting of the cooling module 2 and the limiting module 13 is determined according to the crosslinking curing temperature of the single-component silica gel.

The pipe fitting 4 is placed on the pipe fitting fixing head 153, and the pipe fitting 4 is inserted into the injection head 14 under the control of the transverse sliding table 151 and the longitudinal sliding table 152; the upper module 131 and the lower module 132 are controlled to be close by the driving oil cylinder 137, and the pipe 4 is fixed; with the movement of the upper and lower modules 131, 132, the piston of the conduction channel 148 is able to move with it by virtue of the incompressible nature of the liquid, through the action of the lever 1486 and the transmission rod 1484; as the upper module 131 and the lower module 132 approach, the piston two 1482 will move towards both sides of the connection end 141, the piston one 1481 will move towards the connection end 141, and the slide 1474 will be driven to move towards the connection end 141 by the connecting rod 1483; as the slider 1474 moves toward the connection end 141, the second elastic member 1472 is spread and lifted upward.

When the upper module 131 and the lower module 132 are completely attached, a closed space is formed among the pipe fitting 4, the first elastic piece 1471, the second elastic piece 1472 and the arc-shaped groove 144, and the glue pumping module 3 and the injection cylinder 12 are started to perform seal ring injection molding.

After the sealing ring is solidified, the driving oil cylinder 137 controls the upper module 131 to be separated from the lower module 132, the piston two 1482 moves towards the center of the connecting end 141, the piston one 1481 moves towards the inserting end 142, and the connecting rod 1483 drives the sliding block 1474 to move towards the inserting end 142; retracting and lowering the second resilient member 1472 so that the injection molded gasket and tube 4 can be simultaneously demolded; after demoulding, the sealing ring is positioned in the pipe fitting 4.

By means of injection molding of the sealing ring inside the pipe fitting 4, the sealing ring is also subjected to assembly work of the pipe fitting 4 and the sealing ring after molding. The sealing ring injection molding equipment and the sealing ring injection molding method enable a pipe fitting 4 manufacturer to solve the problems of transportation cost and manual assembly cost caused by sealing ring purchase, enable the sealing ring of the pipe fitting 4 to finish assembly work during production, truly realize self-production and self-sufficiency of the pipe fitting 4 manufacturer on the sealing ring, and greatly reduce the production cost of the clamping and pressing pipe fitting.

The technical effects of the invention are mainly as follows: the single-component silica gel sealing ring injection molding equipment and the method for the pipe fitting utilize the characteristic that the single-component silica gel can start to react and crosslink and solidify after encountering proper high temperature, so that the sealing ring completes the assembly work of the pipe fitting and the sealing ring after injection molding is carried out in the pipe fitting; the sealing ring of the pipe fitting can be assembled during production, so that self-production and self-sufficiency of a pipe fitting manufacturer on the sealing ring are truly realized, and the production cost of the clamping and pressing type pipe fitting is greatly reduced.

The high-temperature crosslinking and solidifying of the single-component silica gel is adopted, so that the injection material flowing out of the discharge port of the injection channel is crosslinked and solidified under the condition that the temperature reaches, the injection material in the injection channel can be kept continuously for liquid because the temperature can not reach the crosslinking and solidifying requirement, the problems of difficult demolding and blockage of the discharge port caused by solidification of the injection material of the discharge port in the cooling and forming process are avoided, and the injection material in the injection channel can be prevented from being solidified in a mode of being far away from a heating body after the upper module and the lower module are separated, so that the blockage of the discharge port of the injection channel is avoided.

Of course, the above is only a typical example of the invention, and other embodiments of the invention are also possible, and all technical solutions formed by equivalent substitution or equivalent transformation fall within the scope of the invention claimed.

Claims (10)

1. Single-component silica gel sealing washer injection moulding equipment for pipe fitting, its characterized in that: the device comprises a glue injection module, wherein the glue injection module comprises an injection cylinder and a limiting module;

the glue injection cylinder is provided with a first glue channel and a first cooling loop, the first cooling loop surrounds the outer side of the first glue channel, and the output end of the injection cylinder is provided with an injection head;

the limiting module comprises an upper module, a lower module and a heating body, wherein the upper module is provided with a second cooling loop, the lower module is provided with a third cooling loop, the upper module and the lower module are provided with grooves, and the grooves are jointed with the upper module and the lower module to form a cavity for limiting and fixing the pipe fitting; the upper module and the lower module are respectively provided with a corresponding driving oil cylinder;

the inside of injection head has second colloid passageway, is provided with first elastic component and second elastic component on the outer wall to the arc wall has been seted up at the middle part of outer wall, second colloid passageway with first colloid passageway is linked together and is formed the injection passageway, and the pan feeding mouth of this injection passageway sets up on the penetrate the packing element of injection hydro-cylinder, the discharge gate sets up in the arc wall.

2. The one-component silicone gasket injection molding apparatus for pipe fittings of claim 1, wherein: the first elastic piece and the second elastic piece are provided with arc surfaces at one sides close to the arc grooves, and an arc is formed between the arc surfaces and the arc grooves.

3. The one-component silicone gasket injection molding apparatus for pipe fittings of claim 1, wherein: the two ends of the injection head are respectively a connecting end and an inserting end, a conducting channel is further arranged in the injection head, a limiting groove and a sliding groove are further formed in the outer wall of the injection head, a sliding block is further arranged in the sliding groove, the limiting groove and the sliding groove are positioned on two sides of the arc-shaped groove, the limiting groove is close to the connecting end, and the sliding groove is close to the inserting end; the first elastic piece is arranged in the limiting groove, the second elastic piece is arranged in the sliding groove, and the second elastic piece is movably arranged on the sliding block.

4. A one-component silicone gasket injection molding apparatus for pipe fittings as claimed in claim 3, wherein: the sliding block is arranged in a table body, the top surface of the sliding block faces the arc-shaped groove, and the surface of the second elastic piece, which is contacted with the sliding block, is obliquely arranged; the top surface of the sliding block is provided with a guide groove, the inside of the sliding groove is provided with a guide block, and the guide block is matched with the guide groove.

5. A one-component silicone gasket injection molding apparatus for pipe fittings as claimed in claim 3, wherein: one end of the conduction channel is communicated with the sliding groove, the other end of the conduction channel is communicated with the side wall of the connecting end, the two ends of the conduction channel are respectively provided with a first piston and a second piston, and liquid is filled between the pistons at the two ends; a connecting rod is arranged between the piston I near the chute and the sliding block, and a transmission rod is arranged on the piston II near the side wall of the connecting end; the side wall of the connecting end is provided with a supporting frame, the supporting frame is provided with a lever, one end of the lever is connected with a transmission rod, the other end of the lever is connected with a limiting module, and the connecting positions are all universal joints.

6. The one-component silicone gasket injection molding apparatus for pipe fittings of claim 1, wherein: the injection head is characterized in that the insertion end of the injection head is in a cone shape, the heating elements are arranged in the upper module and the lower module and are annularly distributed on the outer side of the pipe fitting, and the second cooling loop and the third cooling loop are located on the outer side of the heating elements.

7. The one-component silicone gasket injection molding apparatus for pipe fittings of claim 1, wherein: the injection cylinder and the limiting module are arranged on an operation table, and the operation table is also provided with a positioning clamp, a control panel and a code sprayer; the positioning fixture comprises a transverse sliding table, a longitudinal sliding table and a pipe fitting fixing head, wherein the longitudinal sliding table is arranged on a moving block of the transverse sliding table, and the pipe fitting fixing head is arranged on the moving block of the longitudinal sliding table; the code sprayer is positioned at the tail end of the transverse sliding table.

8. The one-component silicone gasket injection molding apparatus for pipe fittings of claim 1, wherein: the device comprises a first cooling loop, a second cooling loop and a third cooling loop, and is characterized by further comprising a cooling module and a gel pumping module, wherein the cooling module is provided with a water chiller, the water chiller is respectively communicated with the first cooling loop, the second cooling loop and the third cooling loop, and the gel pumping module is used for storing and metering single-component silica gel.

9. The one-component silicone gasket injection molding apparatus for pipe fittings of claim 8, wherein: the glue pumping module comprises a mounting frame and a control cabinet, wherein a charging basket is arranged at the bottom end of the mounting frame, a glue pumping cylinder is arranged at the top end of the mounting frame and is supported by a glue pumping cylinder column, a material pressing disc is arranged in the charging basket, an exhaust port is arranged on the material pressing disc, and the exhaust port is controlled to open and close by an exhaust valve; the output end of the glue pumping cylinder is provided with a meter, the meter is arranged on the pressing disc, a feeding port of the meter is communicated with the inside of the charging basket from the pressing disc, and a discharging port of the meter is communicated with a feeding port of the injection channel through a pipe fitting.

10. The injection molding method of the single-component silica gel sealing ring for the pipe fitting is characterized by comprising the following steps of: comprising a one-component silicone gasket injection molding apparatus for pipe fittings according to any one of claims 1 to 9,

before injection, setting the temperature of the cooling module at 18 ℃, starting a heating element to enable the temperature of the limiting module to be stabilized at 130 ℃, and updating the date and the content of the code sprayer;

placing the pipe fitting on a pipe fitting fixing head, and controlling the pipe fitting to be inserted into an injection head through a transverse sliding table and a longitudinal sliding table;

the upper module and the lower module are controlled to be close by the driving oil cylinder, and the pipe is fixed; with the movement of the upper module and the lower module, the piston of the conduction channel can move along with the incompressible characteristic of the liquid under the action of the lever and the transmission rod;

along with the closing of the upper module and the lower module, the second piston moves towards the two sides of the connecting end, the second piston moves towards the connecting end at a moment, and the sliding block is driven to move towards the connecting end through the connecting rod;

the second elastic piece is propped up and lifted upwards along with the movement of the sliding block to the connecting end;

when the upper module and the lower module are completely attached, a closed space is formed among the pipe fitting, the first elastic piece, the second elastic piece and the arc-shaped groove, and the glue pumping module and the injection cylinder are started to perform seal ring injection molding;

after the sealing ring is solidified, the driving oil cylinder controls the upper module to be separated from the lower module, the second piston moves towards the center of the connecting end, the second piston moves towards the inserting end for a while, and the connecting rod drives the sliding block to move towards the inserting end; the second elastic piece is retracted and lowered downwards, so that the sealing ring and the pipe fitting after injection molding can be simultaneously demolded;

after demoulding, the sealing ring is positioned in the pipe fitting.