CN112092283B - A kind of APG production method and device for casing - Google Patents

Abstract

The invention discloses an APG production method and device for casing, including pressurizing and maintaining pressure and isolating glue injection. In the APG production method and device for casing, a one-time continuous glue injection process is set up. For the intermittent multiple glue injection process, in the middle of every two glue injection processes, the layered glue injection plug and the side wall of the main body are combined to achieve sealing. After sealing, the continuous epoxy resin mixture will be disconnected. In this way, the mixture at both ends of the layered rubber injection plug in the injection pipe is isolated, so the subsequent mixture will not affect the temperature of the mold cavity, thereby improving the curing efficiency of the mixture in the cavity, and the mixture in the cavity is cured. Then inject and fill again and cycle until the entire product is finally completed.

Description

A kind of APG production method and device for casing

technical field

The invention relates to the technical field of processing equipment, in particular to an APG production method and device for casing.

Background technique

APG is liquid epoxy resin automatic pressure gel, which is developed on the basis of epoxy resin vacuum casting process. It is a type of pressure gel process (PG) technology. , Preheat the mold temperature to 80 to 100 °C higher than the temperature of the epoxy resin mixture, that is, to 140 to 160 °C. Then, through the pressurization system of the APG equipment, the epoxy resin mixture system in the storage tank (which has been vacuum defoamed) is pressed into the mold cavity through the pipeline, so that the epoxy resin mixture system and the high temperature mold wall of the mold can quickly interact. Because the epoxy resin mixture near the mold wall reaches a high temperature state in a short time, the epoxy resin mixture starts to undergo a rapid curing reaction from the vicinity of the mold wall and gels, and the curing volume occurs to the mold wall. shrink. The curing shrinkage part of the epoxy resin mixture is quickly replenished by the liquid epoxy resin mixture still under pressure in the center of the mold cavity. The gel shrinkage of the epoxy resin mixture in the entire mold cavity is caused by the storage. Pressurized epoxy resin mix in the tank for constant replenishment. The entire system is not depressurized until the epoxy resin mixture in the entire cavity is gelled.

In the automatic pressure gelation process of APG, the entire epoxy resin mixture is in contact with the cavity of the mold under pressure, which results in the entire epoxy resin mixture being in a connected system, because the communication is in a In the system, the entire epoxy resin mixture is in a state of heat conduction, which will reduce the heat exchange between the part in contact with the mold wall and affect the efficiency of its curing reaction and gelation. To this end, we propose an APG production method and device for casing.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide an APG production method and device for casing with higher curing efficiency, so as to solve the problems raised in the above-mentioned background art.

To achieve the above object, the present invention provides the following technical solutions: an APG production method for casing, comprising the following steps:

Step 1: Pressurize and maintain pressure: Use the storage tank for pressurizing and maintaining the pressure of the epoxy resin mixture and open the discharge valve for discharging the mixture to discharge the epoxy resin mixture.

Step 2: Isolation injection: This step includes an isolation injection pipeline for intermittent and multiple injection of epoxy resin mixture.

The second step includes the following steps:

Step 1: One-shot glue injection: This step includes a layered glue injection plug set in the isolation glue injection pipeline, the layered glue injection plug is provided with a first glue injection channel for one-time glue injection, and one end of the layered glue injection plug is connected with a The micro-moving pusher for pushing the layered glue injection plug, and one end of the isolation glue injection pipeline is provided with a self-locking glue injection port that can be automatically closed.

Step 2: Secondary glue injection: This step includes a second glue injection channel set on the layered glue injection plug for filling the mold cavity for the second time.

Step 3: Glue injection three times: This step includes a third glue injection channel set on the layered glue injection plug for filling the mold cavity for the third time.

Preferably, the isolation glue injection pipeline includes a main body, one end of the main body is connected with a fixing plate on which the micro-moving pushing device is installed, the side wall of the main body is provided with a feeding port, and the inner wall of one end of the main body away from the fixing plate is connected to the inner wall of the main body. The self-locking glue injection port is connected, and the inner side wall of the main body is provided with a first overflow groove, a second overflow groove and a third overflow groove. To achieve the locking of the injection port, the epoxy resin mixture placed in the main body flows out.

Preferably, the layered rubber injection plug is axially provided with a main channel, and the side wall of the layered rubber injection plug is provided with a first through groove, a second through groove and a third through groove. The outer side wall of the rubber stopper is provided with a chute and a moving opening, and the moving opening is connected with the main channel. The three through grooves can realize the intermittent glue injection process, and different positions of the three through grooves are set to realize the start of glue injection at different positions. and the end position of the glue injection, so as to separate the two glue injections.

Preferably, there are multiple sets of the first through groove, the second through groove and the third through groove, and the first through groove, the second through groove and the third through groove are along the axis of the layered plastic injection plug Distributed to the interval, different layers can achieve the first, second and third injection when the layered injection plug moves to different positions.

Preferably, the first glue injection channel is composed of a first through groove and a first overflow groove, the second glue injection channel is composed of a second through groove and a second overflow groove, and the third glue injection channel It is composed of a third through groove and a third overflow groove, and the three glue injection channels are divided into three injections, so as to be cut off and separated after each injection, so that the temperature of the mold cavity will not be conducted, so as to facilitate the Improve efficiency.

Preferably, the micro-moving pushing device includes a hydraulic rod, the hydraulic rod is fixedly mounted on the fixing plate, and the output end of the hydraulic rod is connected with the end of the layered rubber injection plug, and the end of the hydraulic rod is A first spring is connected, and the first spring is arranged in the layered plastic injection plug, and the micro-moving pushing device pushes the layered plastic injection plug forward, so as to reach the position of three times of plastic injection.

Preferably, the self-locking glue injection port includes an installation plate, one end of the installation plate is connected with a sleeve, a second spring is arranged in the sleeve, and a movable plug is slidably connected to the upper part of the sleeve, so The movable plug is provided with a through hole and a discharge port, and the outer surface of the movable plug is slidably connected to the main body. The movable plug can realize the switch of isolating the injection pipe, so as to isolate the injection pipe and the mold when a product is taken out. Sealing can be achieved at the same time to prevent the mixture from flowing out.

Preferably, the outer surface of the movable plug is provided with a first sealing ring, and one end of the layered rubber injection plug is connected with a second sealing ring, and the sealing ring can better seal the internal structure of the device, thereby realizing the device extended service life.

Preferably, the main body is provided with a pressure sensor, and the pressure sensor is located between the third overflow groove and the mounting plate, and the pressure sensor measures the pressure in the cavity between the mounting block and the layered plastic injection plug, so as to facilitate Determine the push time of the inching pusher.

Compared with the prior art, the beneficial effects of the present invention are:

In the invention, the one-time continuous glue injection process is set as an intermittent multiple glue injection process, and in the middle of every two glue injection processes, the layered glue injection plug and the side wall of the main body cooperate to realize the sealing. The continuous epoxy resin mixture will be disconnected, thereby isolating the mixture at both ends of the layered injection plug in the injection pipe, so the subsequent mixture will not affect the temperature of the mold cavity, thereby improving the mixture in the cavity. curing efficiency, and after the mixture in the cavity is cured, it is injected and filled again to cycle until the final product is completed.

Description of drawings

Fig. 1 is the overall structure schematic diagram of the present invention;

Figure 2 is a schematic diagram of the main half-section structure;

Fig. 3 is the overall structure development schematic diagram of the present invention;

Figure 4 is a schematic diagram of a half-section structure of a layered rubber injection plug;

Figure 5 is a schematic view of the half-section structure of the self-locking plastic injection port;

FIG. 6 is a schematic cross-sectional view when the first glue injection channel is connected.

In the picture: 1-Isolation glue injection pipe; 2-Main body; 3-Fretting push device; 4-Fixed plate; 5-Feed port; 6-Self-locking glue injection port; 2nd overflow groove; 9-third overflow groove; 10-layered rubber injection plug; 11-main flow channel; 12-first through groove; 13-second through groove; 14-third through groove; 15- Chute; 16-Movement opening; 17-First glue injection channel; 18-Second glue injection channel; 19-Third glue injection channel; 20-Hydraulic rod; 21-First spring; 22-Installation plate; 23- Sleeve; 24-second spring; 25-moving plug; 26-through hole; 27-discharge port; 28-first sealing ring; 29-second sealing ring; 30-pressure sensor.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

1. 1-4, the present invention provides a technical solution: an APG production method and device for casing, comprising the following steps:

Step 1: Pressurize and maintain pressure: Use the storage tank for pressurizing and maintaining the pressure of the epoxy resin mixture and open the discharge valve for discharging the mixture to discharge the epoxy resin mixture.

Step 2: Isolated glue injection: This step includes the isolation glue injection pipeline 1 for intermittent and multiple injection of the epoxy resin mixture.

The second step includes the following steps:

Step 1: One-shot glue injection: This step includes a layered glue injection plug 10 disposed in the isolation glue injection pipeline 1, and the layered glue injection plug 10 is provided with a first glue injection channel 17 for one-time glue injection, and layered glue injection One end of the plug 10 is connected with a micro-motion pushing device 3 for pushing the layered glue injection plug 10 , and one end of the isolated glue injection pipe 1 is provided with a self-locking glue injection port 6 that can be automatically closed.

Step 2: Secondary glue injection: This step includes the second glue injection channel 18 provided on the layered glue injection plug 10 for filling the mold cavity for the second time.

Step 3: Glue injection three times: This step includes the third glue injection channel 19 provided on the layered glue injection plug 10 for filling the mold cavity for the third time.

The circular isolation glue injection pipeline 1 is used as a conveying device between the storage tank of the epoxy resin mixture and the mold. The side wall of the main body 2 of the isolation glue injection pipeline 1 is provided with a feeding port 5, which is connected to the storage The tank is connected to facilitate the introduction of the mixture, and the layered rubber injection plug 10 is arranged inside the isolation glue injection pipeline 1. The inner wall of 1 is slidingly connected, and there are three groups of glue injection channels on the layered glue injection plug 10. Each group of glue injection channels has different casting times and different injection times. Isolate the mixture at both ends of the layered rubber injection plug 10 so as not to conduct heat conduction and reduce the curing efficiency. The end of the layered rubber injection plug 10 close to the feed port 5 is connected with a micro-motion push device 3, and the micro-motion push device 3 is used for To push the layered plastic injection plug 10 forward, so as to realize the step-by-step glue injection, the end of the main body 2 away from the layered plastic injection plug 10 is provided with a self-locking plastic injection port 6. Before the device touches the mold plastic injection port and exits Self-locking is realized after the mold enters the glue port, so that the epoxy resin mixture will not leak.

The layered plastic injection plug 10 is a columnar body, and is provided with three layers of flow channels from one end to the other end, which are a first through groove 12, a second through groove 13 and a third through groove 14 in sequence, and each through groove is provided with a There are multiple groups, which are evenly distributed with the axis of the layered rubber injection plug 10 as the center of the circle. The main channel 11 is arranged inside the layered rubber injection plug 10, and the main channel 11 is respectively located in the first through groove 12 and the second through groove 13. and the third through groove 14, and the other end of the main channel 11 is connected with the moving opening 16 on the outer side wall of the layered plastic injection plug 10, the moving opening 16 corresponds to the position of the feeding port 5, and the inner side wall of the main body 2 is provided with a first There are three sets of overflow grooves: overflow groove 7, second overflow groove 8 and third overflow groove 9, and the three sets of overflow grooves have multiple groups and the number of each group is the same as that of the first through groove 12 and the second through groove. 13 and the number of the third through grooves 14 are the same, the first glue injection channel 17 is composed of the first through groove 12 and the first overflow groove 7, and the second glue injection channel 18 is composed of the second through groove 13 and the first overflow groove 7. Two overflow grooves 8 are formed, and the third glue injection channel 19 is composed of a third through groove 14 and a third overflow groove 9, and passes through the first glue injection channel 17, the second glue injection channel 18 and the third glue injection channel. 19 Realize the first, second and third injections. The number of injections is not limited to three times. The number of injections of the device is determined according to the volume of the mold cavity. There are two overflow grooves in each of the three groups. The groove is formed, a main groove is on the forward path of the through groove, so that the two can be connected when they are in contact, and the auxiliary groove on the side is a flow groove, so that the mixture in the main groove can flow into the cavity of the main body 2.

The micro-motion pushing device 3 pushes the advance of the layered rubber injection plug 10 through the hydraulic rod 20. The outer side wall of the layered rubber injection plug 10 is provided with a chute 15, and the corresponding position of the main body 2 is provided with a slider, so as to facilitate the The hydraulic rod 20 maintains stability when pushing the layered plastic injection plug 10 forward, and a pressure sensor 30 is provided on the main body 2. After each injection of plastic into the mold, the two ends of the layered plastic injection plug 10 are in a connected state, and the two ends are in a connected state. The pressure is the same, so when the pressure is the same, it is detected by the pressure sensor 30, so that the control part on the injection machine receives the signal of the pressure sensor 30 and controls the hydraulic rod 20 to extend, so as to push the layered rubber injection plug forward, so that the injection channel If it is blocked, stop the glue injection. At this time, the layered glue injection plug 10 cuts off the mixture and prevents heat conduction, so as to improve the curing efficiency. After the mixture in the mold cavity continues to solidify and shrink, the volume decreases, and the layered injection The rubber stopper 10 moves toward one end of the self-locking glue injection port under the condition of unbalanced pressure at both ends, the first spring 21 is stretched, and after a certain degree of contraction, the second through groove 13 on the layered rubber injection stopper 10 reaches the second. At the position of the overflow groove 8, the two ends of the layered rubber injection plug 10 are connected again, and the second injection starts. When the pressure is balanced again, the hydraulic rod 20 pushes the layered rubber injection plug 10 forward, and the first spring 21 returns. , and repeat the action in sequence to achieve the third injection and more injections.

When the self-locking glue injection port 6 just contacts the mold and starts to extend, the moving plug 25 is pushed back, and the second spring 24 is compressed at the same time. After the moving plug 25 is pushed back, the through hole 26 on the moving plug 25 reaches the main body 2, so that the mixed material in the inner cavity flows out from the through hole 26, and is discharged into the glue inlet of the mold through the discharge port 27. The sleeve 23 is arranged on the outside of the second spring 24, so as to protect the first Two springs 24, the mounting plate 22 plays a fixed role, and the mounting plate 22 is provided with a groove to facilitate material feeding. When the isolation glue injection pipe 1 is separated from the mold, the second spring 24 begins to recover, so that the movable plug 25 Stick out, plugged again to avoid leaks.

Working principle: When the storage tank opens the discharge valve, due to the action of pressure, the mixed material enters the moving opening 16 on the layered rubber injection plug 10 from the feeding port 5, and then reaches the main channel 11, because at this time the layer is layered. The through grooves on the rubber injection plug 10 are all blocked by the inner wall of the main body 2. Therefore, due to the high pressure on the side of the mixture, the layered rubber injection plug 1 is pushed forward, the first spring 21 is stretched, and the first spring 21 is stretched. The through groove 12 reaches the position of the first overflow groove 7, and the mixture flows into the cavity of the main body 2 through the first injection channel 17 formed by the first through groove 12 and the first overflow groove 7. When the mold cavity is filled After completion, the pressures on both sides are balanced, and after the pressure sensor 30 detects the standard pressure, the hydraulic rod 20 works to push the layered plastic injection plug 10, the first through groove 12 is blocked by the inner side wall of the main body 2 again, and the first spring 21 returns to its original state. , after blocking, the layered glue injection plug 10 will be pulled due to another curing shrinkage, repeat the first glue injection process, this is the second glue injection, the subsequent glue injection process is the same, in the last glue injection, Because the volume of curing shrinkage in the mold cavity is very small, the mixture in the main body 2 will continue to fill until it is finally completed. The hydraulic rod 20 works and resets.

It should be noted that, in this document, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any relationship between these entities or operations. any such actual relationship or sequence exists. Moreover, the terms "comprising", "comprising" or any other variation thereof are intended to encompass non-exclusive inclusion such that a process, method, article or device comprising a list of elements includes not only those elements, but also includes not explicitly listed or other elements inherent to such a process, method, article or apparatus.

Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, and substitutions can be made in these embodiments without departing from the principle and spirit of the invention and modifications, the scope of the present invention is defined by the appended claims and their equivalents.

Claims (5)

1. an APG production method for casing, is characterized in that: comprise the following steps: Step 1: Pressurize and maintain pressure: use the storage tank for pressurizing and maintaining the epoxy resin mixture and open the discharge valve for discharging the mixture to discharge the epoxy resin mixture; Step 2: isolation glue injection: this step includes an isolation glue injection pipeline (1) for intermittently and multiple injections of epoxy resin mixture; the isolation glue injection pipeline (1) includes a main body (2), and the One end of the main body (2) is connected with a fixing plate (4) on which the micro-moving pushing device (3) is installed, the side wall of the main body (2) is provided with a feeding port (5), and the main body (2) is away from the fixing plate The inner wall of one end of (4) is connected with the self-locking glue injection port (6), and the inner side wall of the main body (2) is provided with a first overflow groove (7), a second overflow groove (8) and a third overflow groove slot(9); The second step includes the following steps: Step 1: One-shot glue injection: This step includes a layered glue injection plug (10) disposed in the isolated glue injection pipe (1), and the layered glue injection plug (10) is provided with a first glue injection channel for one-time glue injection (17), one end of the layered rubber injection plug (10) is connected with a micro-movement pusher (3) that pushes the layered rubber injection plug (10), and one end of the isolated rubber injection pipe (1) is internally provided with a The closed self-locking glue injection port (6); the layered rubber injection plug (10) is axially provided with a main channel (11), and the side wall of the layered rubber injection plug (10) is provided with a first channel The groove (12), the second through groove (13) and the third through groove (14), the outer side wall of the layered plastic injection plug (10) is provided with a chute (15) and a moving opening (16), the The moving opening (16) is connected with the main channel (11); the first through groove (12), the second through groove (13) and the third through groove (14) are provided with multiple groups, and the first through groove (12), the second through groove (13) and the third through groove (14) are all set The groove (12), the second through groove (13) and the third through groove (14) are distributed at intervals along the axial direction of the layered glue injection plug (10); the first glue injection channel (17) is formed by the first through groove (12) and the first overflow groove (7), the second glue injection channel (18) is composed of the second through groove (13) and the second overflow groove (8), and the third glue injection channel (19) is composed of The third through groove (14) and the third overflow groove (9) are formed; Step 2: secondary glue injection: this step includes a second glue injection channel (18) set on the layered glue injection plug (10) for filling the mold cavity for the second time; Step 3: Three-time glue injection: This step includes a third glue injection channel (19) provided on the layered glue injection plug (10) for filling the mold cavity for the third time. 2. An APG production method for casing according to claim 1, characterized in that: the micro-motion pushing device (3) comprises a hydraulic rod (20), and the hydraulic rod (20) is fixedly installed on the on the fixing plate (4), and the output end of the hydraulic rod (20) is connected with the end of the layered rubber injection plug (10), and the end of the hydraulic rod (20) is connected with a first spring (21) , and the first spring (21) is arranged in the layered plastic injection plug (10). 3. An APG production method for a casing according to claim 2, characterized in that: the self-locking glue injection port (6) comprises a mounting plate (22), and one end of the mounting plate (22) A sleeve (23) is connected, a second spring (24) is arranged in the sleeve (23), and a movable plug (25) is slidably connected to the upper of the sleeve (23), and the movable plug (25) ) is provided with a through hole (26) and a discharge port (27), and the outer surface of the moving plug (25) is slidably connected with the main body (2). The method for producing APG for casing according to claim 3, characterized in that: the outer surface of the movable plug (25) is provided with a first sealing ring (28), and the layered glue injection One end of the plug (10) is connected with a second sealing ring (29). The method for producing APG for casing according to claim 4, characterized in that: the main body (2) is provided with a pressure sensor (30), and the pressure sensor (30) is located in the third Between the overflow groove (9) and the mounting plate (22).

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