CN118358133A - A composite material bag injection molding process - Google Patents

Abstract

The invention relates to the technical field of injection molding processes of bags and cases, and discloses an injection molding process of a composite material bag. According to the invention, through the arrangement of the material receiving assembly, the demoulding structure is used for demoulding the formed bags and the bags, after the bags are demoulded, the bags fall down through the blanking groove to be collected in the box, when the sliding block moves to one side of the female die again, the sliding block drives the connecting frame, the connecting rod and the push plate to move, the push plate pushes the bags in the box to the material discharging port, and the bags slide to the ground along the sloping plate to be discharged, so that the processed bags can be conveniently collected.

Description

A composite material bag injection molding process

Technical Field

The invention relates to the technical field of luggage injection molding process equipment, in particular to a composite material luggage injection molding process.

Background technique

Bag injection molding refers to a production method in which the plastic raw materials are heated and melted, then injected into the mold under high pressure, and then cooled and solidified to form. This method is widely used in the production of luggage products such as suitcases and briefcases, and is widely used due to its advantages such as light weight, high strength, good weather resistance and high safety.

The application number is CN202210920073.7, which discloses an injection molding method, an injection mold, and a luggage molding mold, including: obtaining an injection mold with a case membrane placed inside; closing the injection mold and starting injection molding; injection molding to obtain a case; opening the injection mold to take out the case. Through the above method, the diversity of luggage design can be increased and the wear resistance of the case shell can be improved, while solving the problems of flow marks and weld lines on the appearance of traditional injection-molded luggage.

Although such a setting can increase the diversity of luggage design and improve the wear resistance of the luggage shell in the above manner, while solving the problems of flow marks and weld lines on the appearance of traditional injection-molded luggage, after the luggage is demolded, the luggage will fall between the die and the punch, which requires manual collection. During the collection process, there is a certain safety hazard when personnel pass between the die and the punch.

Summary of the invention

The object of the present invention is to provide an injection molding process for composite material bags to solve the problems raised in the above background technology.

To solve the above technical problems, the present invention is achieved through the following technical solutions:

The present invention is an injection molding process for composite material luggage, comprising a support assembly, wherein the support assembly comprises a base frame, a first vertical plate, a second vertical plate and a support plate;

A hydraulic cylinder is installed on the outer wall of the first vertical plate, a concave die is installed on the outer wall of the second vertical plate, a sliding block is installed on the output end of the hydraulic cylinder, and a convex die is installed on the end of the sliding block away from the hydraulic cylinder;

The male and female dies cooperate with each other to form bags;

A material receiving assembly is installed at the bottom of the support plate, and a material discharge trough is opened on the outer wall of the support plate, and the material discharge trough faces the material receiving assembly;

The material receiving assembly includes an inclined plate, a connecting frame, a connecting rod, a push plate for pushing materials and a collecting box for receiving materials. The connecting frame, the connecting rod and the push plate are connected to each other. The connecting frame is connected to a sliding block, and the sliding block drives the connecting frame.

The two base frames are provided, and the two base frames are installed on the lower surface of the support plate, and the first vertical plate and the second vertical plate are installed at two ends of the support plate respectively;

The purpose of such arrangement is to control the movement of the sliding block and the punch through the output end of the hydraulic cylinder so that the punch and the die fit together, the convex block of the punch is provided with an annular groove, the outer wall of the die groove of the die is provided with an annular block, the punch and the die fit together with a gap, the annular block and the annular groove fit together with a gap, the injection tube extends to the inner wall of the annular groove, after molding, the hydraulic cylinder controls the sliding block to move back, during the retreat process, the demoulding structure demoulds the molded bags, after the bags are demoulded, they fall through the discharge chute to the inside of the collection box, when the sliding block moves to the side of the die again, the sliding block drives the connecting frame, the connecting rod and the push plate to move, and the bags inside the collection box are discharged, thereby facilitating the collection of the processed bags.

A connecting rod is connected between the first vertical plate and the second vertical plate, the connecting rod passes through the sliding block and is slidably connected, a moving groove is provided on the outer wall of the support plate, the sliding block is slidably connected to the moving groove of the support plate, and the output end of the hydraulic cylinder drives the sliding block;

The purpose of this arrangement is to control the movement of the sliding block and the punch through the output end of the hydraulic cylinder.

Furthermore, the sliding block is connected to the connecting frame through the moving groove of the supporting plate, and the sliding block drives the connecting frame;

The collecting box is mounted on the outer wall of the bottom port of the material discharge chute, and the connecting rod is connected to the outer wall of the connecting frame;

The connecting rod passes through the collecting box and extends to the inside of the collecting box, and is slidably connected. The push plate is installed at one end of the connecting rod inside the collecting box, and the push plate is slidably connected to the inner wall of the collecting box. The inclined plate is arranged at the discharge port of the collecting box.

The purpose of this arrangement is that after forming, the hydraulic cylinder controls the sliding block to move back, and during the process of retreating, the demoulding structure demoulds the formed bag;

After the bags are demoulded, they fall through the discharge chute into the inside of the collection box. When the sliding block moves toward the side of the die again, the sliding block drives the connecting frame, connecting rod and push plate to move, and discharges the bags inside the collection box, thereby facilitating the collection of the processed bags.

Furthermore, the male mold and the female mold are on the same axis, a plurality of injection tubes are arranged on the outer wall of the male mold, the convex block of the male mold is provided with an annular groove, and the outer wall of the mold groove of the female mold is provided with an annular block;

The male mold and the female mold fit each other with a gap, the annular block and the annular groove fit each other with a gap, and the injection tube extends to the inner wall of the annular groove;

The purpose of this arrangement is to inject the raw material into the gap through the injection tube for bag molding.

Furthermore, a sliding cavity is arranged inside the sliding block, and a demoulding structure is arranged inside the sliding cavity.

Further, the demoulding structure includes a sliding plate, a push rod and a spring, and also includes a touch rod, the sliding plate is slidably connected to the inner wall of the sliding cavity, a plurality of push rods are connected to the outer wall of the sliding plate, the push rods penetrate the sliding cavity and extend to the inner wall of the annular groove, the push rods are slidably connected to the sliding block, and a spring is connected between the outer wall of the sliding plate and the inner wall of the sliding cavity;

The purpose of this arrangement is that the spring is used for the sliding plate and the push rod to reset.

Furthermore, the four touch rods are respectively mounted on the outer wall of the first vertical plate, the four touch rods penetrate the sliding block and extend to the inside of the sliding cavity, and the touch rods and the sliding block are slidably connected;

The purpose of such arrangement is that when the sliding block retreats, the touch rod pushes the sliding plate, the sliding plate squeezes the spring, and the ejector rod passes through the punch to eject and demould the molded bag on the outer wall of the punch block.

Furthermore, a first ventilation slot is provided on the outer wall of the male mold, a second ventilation slot is provided on the outer wall of the female mold, and a blowing assembly for heat dissipation and cooling is installed on the outer sides of the male mold and the female mold;

The blowing assembly includes a fan and a rotating shaft, a rack is installed on the outer wall of the sliding block, two rotating shafts are provided, and the two rotating shafts are rotatably connected to the outer walls of the male mold and the female mold respectively, a gear is installed on the outer wall of the rotating shaft, and the fan is installed at one end of the rotating shaft close to the gear, and the gear and the rack are meshed with each other;

The purpose of this arrangement is that during the last molding process, there is residual heat inside the punch, and during the movement of the sliding block, the blowing assembly is driven to operate to dissipate the heat of the punch, and during the movement of the sliding block, the rack is driven to move, and the gear and the rack are meshed with each other, driving the gear and the shaft to rotate, thereby driving the fan to rotate, generating airflow, so that the airflow passes through the first ventilation slot and the second ventilation slot to dissipate the heat of the punch and the die.

The present invention has the following beneficial effects:

(1) The present invention adopts the arrangement of the material receiving assembly. When the sliding block retracts, the demoulding structure demoulds the formed bags. After demoulding, the bags fall through the material discharge chute to the inside of the collection box. When the sliding block moves toward the side of the die again, the sliding block drives the connecting frame, the connecting rod and the push plate to move. The push plate pushes the bags inside the collection box to the discharge port. The bags slide along the inclined plate to the ground for discharge, thereby facilitating the collection of the processed bags and eliminating the need for personnel to collect the bags between the die and the punch, thereby reducing safety hazards.

Of course, any product implementing the present invention does not necessarily need to achieve all of the above-mentioned advantages at the same time.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for describing the embodiments are briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without creative work.

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

Fig. 2 is a schematic diagram of the internal structure of the present invention;

FIG3 is a schematic diagram of the internal structure of the present invention;

FIG4 is a schematic diagram of the blowing structure of the present invention;

FIG5 is a schematic diagram of a material pushing structure of the present invention;

FIG6 is a schematic diagram of the workflow of the present invention;

In the accompanying drawings, the components represented by the reference numerals are listed as follows:

In the figure: 1. Support assembly; 101. Base frame; 102. First vertical plate; 103. Second vertical plate; 104. Feed chute; 105. Support plate; 2. Hydraulic cylinder; 3. Sliding block; 301. Sliding cavity; 4. Punch; 40. Injection tube; 401. First ventilation slot; 5. Blowing assembly; 501. Rotating shaft; 502. Gear; 503. Rack; 504. Fan; 6. Material collecting assembly; 601. Inclined plate; 602. Connecting frame; 603. Connecting rod; 604. Push plate; 605. Collecting box; 7. Concave mold; 701. Second ventilation slot; 8. Connecting rod; 9. Touch rod; 10. Sliding plate; 1001. Push rod; 11. Spring.

Detailed ways

The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

Embodiment 1: Referring to FIGS. 1 to 5 , the present invention is a composite material bag injection molding process, comprising a support assembly 1, the support assembly 1 comprising a base frame 101, a first vertical plate 102, a second vertical plate 103 and a support plate 105;

A hydraulic cylinder 2 is mounted on the outer wall of the first vertical plate 102, a concave die 7 is mounted on the outer wall of the second vertical plate 103, a sliding block 3 is mounted on the output end of the hydraulic cylinder 2, and a convex die 4 is mounted on the end of the sliding block 3 away from the hydraulic cylinder 2;

The male die 4 and the female die 7 cooperate with each other to form the bag;

A material receiving assembly 6 is installed at the bottom of the support plate 105, and a material discharge trough 104 is opened on the outer wall of the support plate 105, and the material discharge trough 104 faces the material receiving assembly 6;

The material collecting assembly 6 includes an inclined plate 601, a connecting frame 602, a connecting rod 603, a push plate 604 for pushing materials and a collecting box 605 for collecting materials. The connecting frame 602, the connecting rod 603 and the push plate 604 are interconnected. The connecting frame 602 is interconnected with the sliding block 3, and the sliding block 3 drives the connecting frame 602.

Two base frames 101 are provided, and the two base frames 101 are installed on the lower surface of the support plate 105, and the first vertical plate 102 and the second vertical plate 103 are installed at both ends of the support plate 105 respectively;

The purpose of such arrangement is to control the movement of the sliding block 3 and the punch 4 through the output end of the hydraulic cylinder 2, so that the punch 4 and the die 7 are fitted together, the convex block of the punch 4 is provided with an annular groove, and the outer wall of the die groove of the die 7 is provided with an annular block, the punch 4 and the die 7 are fitted together, leaving a gap, the annular block and the annular groove are fitted together, leaving a gap, and the injection tube 40 extends to the inner wall of the annular groove. After molding, the hydraulic cylinder 2 controls the sliding block 3 to move back. During the retreat process, the demoulding structure demoulds the molded bags. After the bags are demoulded, they fall through the discharge chute 104 to the inside of the collection box 605. When the sliding block 3 moves to the side of the die 7 again, the sliding block 3 drives the connecting frame 602, the connecting rod 603 and the push plate 604 to move, and the bags inside the collection box 605 are discharged, thereby facilitating the collection of the processed bags.

A connecting rod 8 is connected between the first vertical plate 102 and the second vertical plate 103, and the connecting rod 8 penetrates the sliding block 3 and is slidably connected. A moving groove is provided on the outer wall of the support plate 105, and the sliding block 3 is slidably connected to the moving groove of the support plate 105. The output end of the hydraulic cylinder 2 drives the sliding block 3.

The purpose of such arrangement is to control the movement of the sliding block 3 and the punch 4 through the output end of the hydraulic cylinder 2 .

The sliding block 3 is connected to the connecting frame 602 through the moving groove of the supporting plate 105, and the sliding block 3 drives the connecting frame 602;

The collecting box 605 is mounted on the outer wall of the bottom port of the feeding chute 104, and the connecting rod 603 is connected to the outer wall of the connecting frame 602;

The connecting rod 603 passes through the collecting box 605 and extends to the inside of the collecting box 605, and is slidably connected. The push plate 604 is installed at one end of the connecting rod 603 inside the collecting box 605, and the push plate 604 is slidably connected to the inner wall of the collecting box 605. The inclined plate 601 is set at the discharge port of the collecting box 605;

The purpose of this arrangement is that after forming, the hydraulic cylinder 2 controls the sliding block 3 to move back, and during the process of retreating, the demoulding structure demoulds the formed bag;

After the bags are demoulded, they fall through the discharge chute 104 into the collection box 605. When the sliding block 3 moves toward the die 7 again, the sliding block 3 drives the connecting frame 602, the connecting rod 603 and the push plate 604 to move, and discharge the bags inside the collection box 605, thereby facilitating the collection of the processed bags.

The male mold 4 and the female mold 7 are coaxial, a plurality of injection tubes 40 are arranged on the outer wall of the male mold 4, the convex block of the male mold 4 is provided with an annular groove, and the outer wall of the mold groove of the female mold 7 is provided with an annular block;

The male mold 4 and the female mold 7 fit each other with a gap, the annular block and the annular groove fit each other with a gap, and the injection tube 40 extends to the inner wall of the annular groove;

The purpose of such arrangement is to inject the raw material into the gap through the injection tube 40 for bag molding.

A sliding cavity 301 is disposed inside the sliding block 3 , and a demoulding structure is disposed inside the sliding cavity 301 .

The demoulding structure includes a sliding plate 10, a push rod 1001 and a spring 11, and also includes a touch rod 9. The sliding plate 10 is slidably connected to the inner wall of the sliding cavity 301, and a plurality of push rods 1001 are connected to the outer wall of the sliding plate 10. The push rods 1001 penetrate the sliding cavity 301 and extend to the inner wall of the annular groove. The push rods 1001 are slidably connected to the sliding block 3. A spring 11 is connected between the outer wall of the sliding plate 10 and the inner wall of the sliding cavity 301.

The purpose of such arrangement is that the spring 11 is used for the sliding plate 10 and the push rod 1001 to reset.

The four touch rods 9 are respectively mounted on the outer wall of the first vertical plate 102, and the four touch rods 9 penetrate the sliding block 3 and extend to the inside of the sliding cavity 301, and the touch rods 9 and the sliding block 3 are slidably connected;

The purpose of such arrangement is that when the sliding block 3 retreats, the touch rod 9 pushes the sliding plate 10, the sliding plate 10 squeezes the spring 11, and the ejector rod 1001 passes through the punch 4 to eject the molded bag on the outer wall of the convex block of the punch 4.

Embodiment 2: Referring to FIG. 1 and FIG. 4 , a first ventilation slot 401 is provided on the outer wall of the male mold 4, a second ventilation slot 701 is provided on the outer wall of the female mold 7, and a blowing assembly 5 for heat dissipation and cooling is installed on the outer sides of the male mold 4 and the female mold 7;

The blowing assembly 5 includes a fan 504 and a rotating shaft 501. A rack 503 is installed on the outer wall of the sliding block 3. Two rotating shafts 501 are provided. The two rotating shafts 501 are rotatably connected to the outer walls of the male mold 4 and the female mold 7 respectively. A gear 502 is installed on the outer wall of the rotating shaft 501. The fan 504 is installed at one end of the rotating shaft 501 close to the gear 502. The gear 502 and the rack 503 are meshed with each other.

The purpose of this arrangement is that during the last molding process, there is residual heat inside the punch 4. During the movement of the sliding block 3, the blowing assembly 5 is driven to operate to dissipate the heat of the punch 4. During the movement of the sliding block 3, the rack 503 is driven to move, and the gear 502 and the rack 503 are meshed with each other, driving the gear 502 and the rotating shaft 501 to rotate, thereby driving the fan 504 to rotate, generating airflow, and allowing the airflow to pass through the first ventilation slot 401 and the second ventilation slot 701 to dissipate the heat of the punch 4 and the die 7.

Working principle: The output end of the hydraulic cylinder 2 controls the sliding block 3 and the punch 4 to move, so that the punch 4 and the die 7 fit together. The convex block of the punch 4 is provided with an annular groove, and the outer wall of the die groove of the die 7 is provided with an annular block. The punch 4 and the die 7 fit together with a gap, and the annular block and the annular groove fit together with a gap. The injection tube 40 extends to the inner wall of the annular groove, and the raw material is injected into the gap through the injection tube 40 for molding bags.

During the last molding process, there is residual heat inside the punch 4. When the sliding block 3 moves, the rack 503 is driven to move, and the gear 502 and the rack 503 are meshed with each other, driving the gear 502 and the rotating shaft 501 to rotate, thereby driving the fan 504 to rotate, generating airflow, and allowing the airflow to pass through the first ventilation slot 401 and the second ventilation slot 701 to dissipate heat for the punch 4 and the die 7;

After molding, the hydraulic cylinder 2 controls the sliding block 3 to move back. During the retreat process, when the sliding block 3 retreats, the touch rod 9 pushes the sliding plate 10, and the sliding plate 10 squeezes the spring 11. The ejector rod 1001 passes through the punch 4 to eject the molded bags on the outer wall of the punch 4. After the bags are demolded, they fall through the discharge chute 104 to the inside of the collection box 605. When the sliding block 3 moves to the side of the die 7 again, the sliding block 3 drives the connecting frame 602, the connecting rod 603 and the push plate 604 to move, and discharges the bags inside the collection box 605, thereby facilitating the collection of the processed bags.

Embodiment 3: Please refer to FIG. 6 , a composite material bag injection molding process, the following steps:

Step 1: Control the sliding block and the punch to move through the output end of the hydraulic cylinder so that the punch and the die fit together;

Step 2: The convex block of the male mold is provided with an annular groove, and the outer wall of the mold groove of the female mold is provided with an annular block. The male mold and the female mold fit each other with a gap, and the annular block and the annular groove fit each other with a gap. The injection tube extends to the inner wall of the annular groove, and the raw material is injected into the gap through the injection tube;

Step 3: During the last molding process, there is residual heat inside the punch. During the movement of the sliding block, the blowing assembly is driven to operate to dissipate heat from the punch.

Step 4: After molding, the hydraulic cylinder controls the sliding block to move back, and during the process of retreating, the demoulding structure demoulds the molded bag;

Step 5: After the bag is demoulded, it falls through the material discharge chute to collect the inside of the box;

Step six, when the sliding block moves toward the side of the die again, the sliding block drives the connecting frame, the connecting rod and the push plate to move, and discharges the bags inside the collection box, thereby facilitating the collection of the processed bags.

The preferred embodiments of the present invention disclosed above are only used to help explain the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims (10)

1. The injection molding process of the composite material luggage is characterized by comprising the following steps of:

Step one, controlling the sliding block (3) and the male die (4) to move through the output end of the hydraulic cylinder (2) so as to enable the male die (4) to be matched with the female die (7);

Step two, the convex block of the convex mold (4) is provided with an annular groove, the outer wall of the mold groove of the concave mold (7) is provided with an annular block, the convex mold (4) and the concave mold (7) are mutually engaged, a gap is reserved, the annular block and the annular groove are mutually engaged, a gap is reserved, the injection molding pipe (40) extends to the inner wall of the annular groove, and raw materials are injected into the gap through the injection molding pipe (40);

step three, in the last molding process, waste heat exists in the male die (4), and in the moving process of the sliding block (3), the air blowing component (5) is driven to operate so as to radiate the heat of the male die (4);

step four, after molding, the hydraulic cylinder (2) controls the sliding block (3) to move and retract, and in the retracting process, the demolding structure performs demolding on the molded case;

Step five, after the luggage is demoulded, the luggage falls down through a blanking groove (104) to collect the inside of the box (605);

Step six, when the sliding block (3) moves to the female die (7) side again, the sliding block (3) drives the connecting frame (602), the connecting rod (603) and the pushing plate (604) to move, and the internal bags of the collecting box (605) are discharged, so that the processed bags are conveniently collected.

2. The utility model provides a combined material case and bag injection moulding device, includes supporting component (1), its characterized in that: the support assembly (1) comprises a bottom frame (101), a first vertical plate (102), a second vertical plate (103) and a support plate (105);

The outer wall of the first vertical plate (102) is provided with a hydraulic cylinder (2), the outer wall of the second vertical plate (103) is provided with a female die (7), the output end of the hydraulic cylinder (2) is provided with a sliding block (3), and one end of the sliding block (3) far away from the hydraulic cylinder (2) is provided with a male die (4);

The male die (4) and the female die (7) are matched with each other to form the case;

The bottom of the supporting plate (105) is provided with a receiving assembly (6), the outer wall of the supporting plate (105) is provided with a discharging groove (104), and the discharging groove (104) faces the receiving assembly (6);

The collecting assembly (6) comprises an inclined plate (601), a connecting frame (602), a connecting rod (603), a pushing plate (604) for pushing materials and a collecting box (605) for collecting the materials, wherein the connecting frame (602), the connecting rod (603) and the pushing plate (604) are connected with each other, the connecting frame (602) is connected with a sliding block (3) mutually, and the sliding block (3) drives the connecting frame (602).

3. The composite luggage injection molding device of claim 2, wherein: the two underframes (101) are arranged, the two underframes (101) are arranged on the lower surface of the supporting plate (105), and the first vertical plate (102) and the second vertical plate (103) are respectively arranged at two ends of the supporting plate (105).

4. A composite material luggage injection moulding device according to claim 3, wherein: connecting rod (8) is connected between first riser (102) and second riser (103), connecting rod (8) run through slider (3) and carry out sliding connection, be provided with the removal groove on the outer wall of backup pad (105), slider (3) sliding connection is on the removal groove of backup pad (105), the output of pneumatic cylinder (2) drives slider (3).

5. The composite luggage injection molding device of claim 4, wherein: the sliding block (3) is connected with the connecting frame (602) through a moving groove of the supporting plate (105), and the sliding block (3) drives the connecting frame (602);

the collecting box (605) is arranged on the outer wall of the bottom port of the blanking groove (104), and the connecting rod (603) is connected to the outer wall of the connecting frame (602);

The connecting rod (603) penetrates through the collecting box (605) and extends to the inside of the collecting box (605) and is in sliding connection, the pushing plate (604) is arranged at one end of the connecting rod (603) located inside the collecting box (605), the pushing plate (604) is in sliding connection with the inner wall of the collecting box (605), and the inclined plate (601) is arranged at a discharge port of the collecting box (605).

6. The composite luggage injection molding device of claim 2, wherein: the male die (4) and the female die (7) are positioned on the coaxial line, a plurality of injection molding pipes (40) are arranged on the outer wall of the male die (4), annular grooves are formed in the protruding blocks of the male die (4), and annular blocks are arranged on the outer wall of the die groove of the female die (7);

The male die (4) and the female die (7) are mutually matched, a gap is reserved, the annular block and the annular groove are mutually matched, a gap is reserved, and the injection molding pipe (40) extends to the inner wall of the annular groove.

7. The composite luggage injection molding device of claim 6, wherein: the inside of sliding block (3) is provided with slip cavity (301), the inside of slip cavity (301) is provided with the drawing of patterns structure.

8. The composite luggage injection molding apparatus of claim 7, wherein: the demolding structure comprises a sliding plate (10), an ejector rod (1001) and a spring (11), and further comprises a touch rod (9), wherein the sliding plate (10) is connected onto the inner wall of the sliding cavity (301) in a sliding mode, the ejector rod (1001) is connected onto the outer wall of the sliding plate (10), the ejector rod (1001) penetrates through the sliding cavity (301) to extend onto the inner wall of the annular groove, the ejector rod (1001) is connected with the sliding block (3) in a sliding mode, and the spring (11) is connected between the outer wall of the sliding plate (10) and the inner wall of the sliding cavity (301).

9. The composite luggage injection molding apparatus of claim 8, wherein: four touch bars (9) are respectively installed on the outer wall of the first vertical plate (102), the four touch bars (9) penetrate through the sliding block (3) and extend to the inside of the sliding cavity (301), and the touch bars (9) are in sliding connection with the sliding block (3).

10. The composite luggage injection molding device of claim 2, wherein: a first ventilation groove (401) is formed in the outer wall of the male die (4), a second ventilation groove (701) is formed in the outer wall of the female die (7), and an air blowing component (5) for heat dissipation and cooling is arranged on the outer sides of the male die (4) and the female die (7);

The air blowing assembly (5) comprises a fan (504) and a rotating shaft (501), racks (503) are arranged on the outer wall of the sliding block (3), the rotating shafts (501) are arranged in two, the rotating shafts (501) are respectively connected to the outer wall of the male die (4) and the outer wall of the female die (7) in a rotating mode, gears (502) are arranged on the outer wall of the rotating shaft (501), the fan (504) is arranged at one end, close to the gears (502), of the rotating shaft (501), and the gears (502) and the racks (503) are meshed with each other.