Injection-molded packaging box and molding die therefor

Abstract

The application relates to the technical field of injection packaging boxes, in particular to an injection packaging box and a forming die thereof, which comprise a placing shell and further comprise: a supporting ring located on the outer side of the placing shell; an A connecting ring fixedly connected with the inner side of the supporting ring and the outer side of the placing shell; four connecting blocks fixedly connected with the inner side of the supporting ring at four corners, and fixedly connected with the upper side of the A connecting ring; four A auxiliary blocks fixed on the outer side of the connecting blocks and fixedly connected with the upper side of the A connecting ring; and the outer side of the A auxiliary block is an inclined surface which is inclined from the lower side to the upper side and close to one end of the connecting block. Through the setting of the upper auxiliary demolding unit, the connecting block and the A top block, the injection packaging box is assisted to be demolded from the upper die from the four corners of the injection packaging box when the upper die is separated, the adhesion probability of the injection packaging box and the upper die is reduced, the damage and deformation probability of the injection packaging box is reduced, and the processing quality is improved.

Description

Technical Field

[0001] This invention relates to the field of injection molding packaging box technology, and in particular to an injection molding packaging box and its molding die. Background Technology

[0002] Plastic boxes are transparent folding boxes, cylinders, hinged boxes, tote bags, hanging tags, and other related plastic products made of materials such as PVC / PET / PP / PS. They can be printed with UV offset printing, screen printing, hot stamping (gold / silver), and frosted finishes. Plastic boxes offer advantages such as enhanced user experience, durable packaging, moisture resistance, waterproofing, high toughness, strong transportation safety, and improved product image.

[0003] Plastic boxes are classified into injection molded packaging boxes and blister packaging boxes according to their processing methods. The molds used for different packaging boxes are also different. Injection molds usually consist of two molds, an upper and a lower mold. A groove is formed on the surface where the two molds meet. During processing, the two molds are in contact, and then material is injected from the upper mold. The material flows into the groove and gradually takes shape. Then the upper mold moves up, and the injection molded packaging box is demolded from the lower mold.

[0004] When an injection mold opens, if the upper mold adheres to the injection-molded packaging box as it moves upwards, it will pull the box slightly upwards with it. Because the demolding is not smooth from the lower mold, the packaging box may become stuck, causing deformation or damage and affecting processing quality. To address this issue, we propose an injection-molded packaging box and its molding die to solve the above problems. Summary of the Invention

[0005] The purpose of this invention is to solve the problem in the prior art where, during the mold opening process, if the upper mold adheres to the injection-molded packaging box as it moves upwards, it will carry the injection-molded packaging box slightly upwards. Since the box is not smoothly demolded from the lower mold, it will get stuck on the lower mold, causing deformation or damage to the injection-molded packaging box and affecting the processing quality. Therefore, this invention proposes an injection-molded packaging box and its molding mold.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] Design an injection-molded packaging box and its molding die, including a shell holder, and further comprising:

[0008] Support ring, the support ring being located on the outside of the placement shell;

[0009] A connecting ring, wherein the A connecting ring is fixedly connected to the inner side of the support ring and the outer side of the placement shell;

[0010] Four connecting blocks, which are fixedly connected to the four corners of the inner side of the support ring, and the connecting blocks are fixedly connected to the upper side of the A connecting ring;

[0011] Four A auxiliary blocks are fixed on the outside of the connecting block. The A auxiliary blocks are fixedly connected to the upper side of the A connecting ring. The outside of the A auxiliary blocks is an inclined surface, and the inclined surface is inclined from the bottom to the top of the end near the connecting block.

[0012] Preferably, the placement shell, support ring, A connecting ring, connecting block and A auxiliary block are all made of plastic and are made as a single piece.

[0013] By adopting the above technical solutions, the connecting block and auxiliary block A improve the overall connection stability of the injection-molded packaging box.

[0014] A molding die for an injection-molded packaging box, comprising the injection-molded packaging box as described in any one of the claims, further comprising: a lower die and an upper die;

[0015] A limiting block, the upper mold has an A forming groove on its lower side, the A limiting block is fixed inside the A forming groove, the A limiting block has a limiting ring fixed on its lower side, the limiting ring has B positioning grooves at its four corners, the A auxiliary block can slide inside the B positioning groove, the A limiting block has an A injection hole on its upper side, the upper mold has a B injection hole on its upper side, the A injection hole and the B injection hole communicate with each other, the placement shell can slide inside the limiting ring, the A limiting block is located on the upper side of the placement shell and the A limiting block and the limiting ring can slide inside the support ring, the support ring can slide inside the A forming groove;

[0016] B limiting block, the upper side of the lower mold is provided with B forming groove, the B limiting block is fixed inside the B forming groove, the B limiting block can slide inside the placement shell, and the support ring can slide inside the B forming groove;

[0017] Four A-top blocks are provided, the A-top blocks are located on the upper side of the connecting block, and the upper side of the A-limiting block is provided with four A-through holes, and the A-top blocks slide inside the A-through holes;

[0018] The contact block has a positioning hole on its upper side, and the contact block can slide inside the positioning hole.

[0019] A base plate, wherein a limiting plate is provided on the upper side of the base plate, and four L-shaped limiting blocks are fixed between the base plate and the limiting plate, and the limiting plate is located on the lower side of the lower mold;

[0020] Four upper auxiliary demolding units are located between the A top block and the upper mold.

[0021] The lower auxiliary demolding unit is located between the L-shaped limiting block and the contact block.

[0022] Preferably, an auxiliary block B is provided on the outside of the auxiliary block A. The auxiliary block B is fixedly connected to the inside of the positioning groove B. The inside of the auxiliary block B is an inclined surface, and the inclined surface is inclined from the bottom to the top near the end of the connecting block.

[0023] By adopting the above technical solution, auxiliary block B, in conjunction with auxiliary block A, makes it easier for the injection-molded packaging box to be ejected from the upper mold.

[0024] Preferably, the upper auxiliary demolding unit includes an A electric push rod. The upper mold has four guide holes on its upper side. A guide cylinder slides inside each guide hole and is slidable within an A through hole. The guide cylinder is fixedly connected to the upper side of an A top block. The A electric push rod is located inside the guide cylinder. A C limiting block is provided on the upper side of the A top block. The C limiting block slides inside the guide cylinder. Two A positioning grooves are provided on the upper side of the guide cylinder. A positioning block slides inside each A positioning groove. The positioning block is fixedly connected to the outer side of the C limiting block and to the inner side of the guide hole. Two guide grooves are provided inside the guide hole. A guide block slides inside each guide groove and is fixedly connected to the outer side of the guide cylinder. The shaft end of the A electric push rod and its other end are fixedly connected to the C limiting block and the A top block, respectively. The A electric push rod is connected to a power supply and a controller via wires.

[0025] By adopting the above technical solution, the upper auxiliary demolding unit can hold the A-top block against the injection molded packaging box, allowing the injection molded packaging box to be demolded better from the upper mold when the upper mold moves upward.

[0026] Preferably, the lower auxiliary demolding unit includes four B electric push rods. The upper side of the lower mold has four B through holes and C through holes. A push rods slide inside the B through holes, and B push rods slide inside the C through holes. The B push rods are fixedly connected to the lower side of the contact block. The upper side of the base plate has a B connecting ring. A cross connecting plate is fixed inside the B connecting ring. The B push rods are fixedly connected to the upper side of the cross connecting plate. The A push rods are fixedly connected to the four corners of the upper side of the B connecting ring. The B connecting ring can slide inside the L-shaped limiting block. Four A connecting plates are fixed outside the B connecting ring. The A connecting plates can slide between two L-shaped limiting blocks. A C connecting ring is provided outside the B connecting ring. The A connecting plates are fixedly connected to the inner side of the C connecting ring. The L-shaped limiting block, the base plate, and the limiting plate can slide inside the C connecting ring. The B electric push rods are installed on the lower mold. The shaft end of the B electric push rod is connected to the upper side of the C connecting ring. The B electric push rods are connected to the power supply and the controller through wires.

[0027] By adopting the above technical solution, the lower auxiliary demolding unit, in conjunction with the contact block, makes it easier for the injection-molded packaging box to be demolded from the lower mold.

[0028] Preferably, four support blocks slide on the inner side of the B connecting ring. The support blocks can slide on the outer side of the cross connecting plate, and the support blocks are fixedly connected to the upper side of the base plate and the lower side of the limiting plate.

[0029] By adopting the above technical solution, the support block improves the connection strength between the base plate and the limiting plate.

[0030] The present invention provides an injection-molded packaging box and its molding die, which have the following advantages:

[0031] 1. By setting up an upper auxiliary demolding unit, connecting block, and A-top block, when the upper mold is released, it assists in demolding from the upper mold at the four corners of the injection molded packaging box, reducing the probability of the injection molded packaging box sticking to the upper mold, thereby reducing the probability of damage and deformation of the injection molded packaging box and improving the processing quality.

[0032] 2. By setting up upper and lower auxiliary demolding units, demolding can be performed more smoothly from the lower and upper molds, thus improving demolding efficiency.

[0033] 3. By setting up connecting blocks and A auxiliary blocks, the overall stability of the injection-molded packaging box is improved. In addition, the connecting blocks increase the thickness of the injection-molded packaging box at the contact points between the upper and lower auxiliary demolding units and the injection-molded packaging box, reducing the probability of the injection-molded packaging box breaking. Attached Figure Description

[0034] Figure 1 This is a three-dimensional structural diagram of an injection-molded packaging box and its molding die proposed in this invention.

[0035] Figure 2 This is a front top view of the three-dimensional structure of an injection-molded packaging box and its molding die proposed in this invention;

[0036] Figure 3 The present invention proposes Figure 2 A magnified three-dimensional structural diagram of a portion of area A in the middle;

[0037] Figure 4 The present invention proposes Figure 2 A magnified three-dimensional structural diagram of a portion of area B in the middle section;

[0038] Figure 5 This is a front-section three-dimensional structural diagram of an injection-molded packaging box and its molding die proposed in this invention;

[0039] Figure 6 The present invention proposes Figure 5 A magnified three-dimensional structural diagram of a portion of the central C area;

[0040] Figure 7 The present invention proposes Figure 5A magnified three-dimensional structural diagram of a portion of the central D region;

[0041] Figure 8 The present invention proposes Figure 5 A magnified three-dimensional structural diagram of a portion of the central E region;

[0042] Figure 9 This is a right-side cross-sectional three-dimensional structural diagram of an injection-molded packaging box and its molding die proposed in this invention.

[0043] Figure 10 The present invention proposes Figure 9 A magnified three-dimensional structural diagram of a portion of the central F region;

[0044] Figure 11 The present invention proposes Figure 9 A magnified three-dimensional structural diagram of a portion of the G region;

[0045] Figure 12 The present invention proposes Figure 9 A magnified three-dimensional structural diagram of the middle H region.

[0046] In the diagram: 1. Housing; 2. Support ring; 3. A connecting ring; 4. Connecting block; 5. A auxiliary block; 6. Lower mold; 7. Upper mold; 8. Upper auxiliary demolding unit; 81. A electric push rod; 82. Guide cylinder; 83. C limiting block; 84. Positioning block; 85. Guide block; 9. Lower auxiliary demolding unit; 91. B electric push rod; 92. A push rod; 93. B push rod; 94. B connecting ring; 95. Cross connecting plate; 96. A connecting plate; 97. C connecting ring; 10. A limiting block; 11. B limiting block; 12. A top block; 13. Contact block; 14. L-shaped limiting block; 15. Base plate; 16. Limiting plate; 17. Limiting ring; 18. B auxiliary block. Detailed Implementation

[0047] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0048] Reference Figure 1-12 A type of injection-molded packaging box and its molding die, including a housing 1, and further including: a support ring 2, an A connecting ring 3, four connecting blocks 4, and four A auxiliary blocks 5;

[0049] Support ring 2 is located on the outside of housing 1;

[0050] A connecting ring 3 is fixedly connected to the inner side of support ring 2 and the outer side of placement shell 1. Placement shell 1, support ring 2 and A connecting ring 3 constitute an injection molded packaging box. The inner side of placement shell 1 is used to place the product.

[0051] The connecting block 4 is fixedly connected to the four corners of the inner side of the support ring 2, and the connecting block 4 is fixedly connected to the upper side of the A connecting ring 3. The connecting block 4 improves the connection strength between the support ring 2 and the A connecting ring 3 and improves the internal stability of the support ring 2, thereby improving the overall stability of the injection molded packaging box. At the same time, the connecting block 4 reduces the probability of damage to the injection molded packaging box caused by the upper auxiliary demolding unit 8 and the lower auxiliary demolding unit 9 mentioned below.

[0052] Auxiliary block 5 is fixed to the outside of connecting block 4. Auxiliary block 5 is fixedly connected to the upper side of connecting ring 3. The outside of auxiliary block 5 is an inclined surface, and the inclined surface is inclined from the bottom to the top of the end close to connecting block 4. Auxiliary block 5 improves the function of connecting block 4, and the inclined surface makes it easier for injection molded packaging boxes to be demolded.

[0053] The housing 1, support ring 2, connecting ring A 3, connecting block 4, and auxiliary block A 5 are all made of plastic and are made as a single piece.

[0054] An injection molding die for a packaging box includes an injection molding box according to any one of claims 1-2, and further includes: an A limiting block 10, a B limiting block 11, four A top blocks 12, four upper auxiliary demolding units 8, a contact block 13, a base plate 15, a lower auxiliary demolding unit 9, a lower mold 6, and an upper mold 7.

[0055] The upper mold 7 has an A forming groove on its lower side, and an A limiting block 10 is fixed inside the A forming groove. A limiting ring 17 is fixed below the A limiting block 10. A B positioning groove is provided at the four corners of the limiting ring 17. An A auxiliary block 5 can slide inside the B positioning groove. An A injection hole is provided on the upper side of the A limiting block 10. A injection hole is provided on the upper side of the upper mold 7. The A injection hole and the B injection hole are connected. The placement shell 1 can slide inside the limiting ring 17. The A limiting block 10 is located on the upper side of the placement shell 1, and the A limiting block 10 and the limiting ring 17 can slide inside the support ring 2. The support ring 2 can slide inside the A forming groove.

[0056] The lower mold 6 has a B forming groove on its upper side, the B limiting block 11 is fixed inside the B forming groove, the B limiting block 11 can slide inside the placement shell 1, and the support ring 2 can slide inside the B forming groove.

[0057] Auxiliary block 5 is provided on the outside of auxiliary block 5. Auxiliary block 18 is fixedly connected to the inside of positioning groove B. The inside of auxiliary block 18 is an inclined surface, and the inclined surface is inclined from the bottom to the top near the end of connecting block 4.

[0058] The upper mold 7, with its A molding groove, A limiting block 10, limiting ring 17, and B auxiliary block 18, and the lower mold 6, with its B molding groove and B limiting block 11, forms the shape of an injection-molded packaging box. Then, raw materials are injected through the A injection hole and the B injection hole to form the injection-molded packaging box (at this time, the injection-molded packaging box is inverted). The upper mold 7 is then moved upward away from the lower mold 6. The A auxiliary block 5 and the B auxiliary block 18 make it easier for the injection-molded packaging box to be demolded from the upper mold 7.

[0059] A top block 12 is located on the upper side of connecting block 4. A limit block 10 has four A through holes on its upper side. A top block 12 slides inside the A through holes.

[0060] The upper auxiliary demolding unit 8 is located between the A top block 12 and the upper mold 7. The upper auxiliary demolding unit 8 includes an A electric push rod 81. The upper mold 7 has four guide holes on its upper side. A guide cylinder 82 slides inside the guide holes and can slide within the A through hole. The guide cylinder 82 is fixedly connected to the upper side of the A top block 12, guiding the A top block 12 and allowing it to move more smoothly into the A through hole. The A electric push rod 81 is located inside the guide cylinder 82. A C limiting block 83 is provided on the upper side of the A top block 12, sliding inside the guide cylinder 82. Two A positioning grooves are provided on the upper side of the guide cylinder 82, with positioning blocks 84 sliding inside each groove. The positioning blocks 84 limit the movement of the guide cylinder 82 and are fixedly connected to the outer side of the C limiting block 83. The positioning blocks 84 are also fixedly connected to the inner side of the guide hole. The guide cylinder 82 is fixedly connected to the guide tube 82. Two guide grooves are provided inside the guide hole, and guide blocks 85 slide inside the guide grooves. Guide blocks 85 guide and limit the movement of the guide tube 82. Guide blocks 85 are fixedly connected to the outside of the guide tube 82. The shaft end of electric push rod 81 and its other end are fixedly connected to limit block C 83 and top block A 12 respectively. Electric push rod 81 is connected to the power supply and controller through wires. When the upper mold 7 moves upward, electric push rod 81 moves down with top block A 12 through limit block C 83, so that top block A 12 always presses against the upper side of connecting ring 3 and connecting block 4 of the injection molded packaging box. This prevents the injection molded packaging box from moving with the upper mold 7, making it easier to completely demold from the upper mold 7, reducing the probability of damage and deformation during demolding, and improving demolding quality.

[0061] B. The upper side of the limiting block 11 is provided with a positioning hole, and the contact block 13 can slide inside the positioning hole;

[0062] A limiting plate 16 is provided on the upper side of the base plate 15. Four L-shaped limiting blocks 14 are fixed between the base plate 15 and the limiting plate 16. The limiting plate 16 is located on the lower side of the lower mold 6. The base plate 15, the limiting plate 16 and the L-shaped limiting blocks 14 constitute a mounting shell for installing the lower auxiliary demolding unit 9 mentioned below.

[0063] The lower auxiliary demolding unit 9 is located between the L-shaped limiting block 14 and the contact block 13. The lower auxiliary demolding unit 9 includes four B electric push rods 91. The upper side of the lower mold 6 is provided with four B through holes and C through holes. The A push rod 92 slides inside the B through holes, and the B push rod 93 slides inside the C through holes. The B push rods 93 are fixedly connected to the lower side of the contact block 13. The upper side of the base plate 15 is provided with a B connecting ring 94. The inner side of the B connecting ring 94 is fixed with a cross connecting plate 95. The B push rods 93 are fixedly connected to the upper side of the cross connecting plate 95. The A push rods 92 are fixedly connected to the four corners of the upper side of the B connecting ring 94. Four connecting plates 96 are fixed on the outside of the B connecting ring 94. The A connecting plates 96 can slide between the two L-shaped limiting blocks 14. The B connecting ring 94 can slide inside the L-shaped limiting blocks 14. The B push rod 93, along with the contact block 13, demolds the injection molded packaging box from the lower mold 6. Then, the A push rod 92 pushes the connecting block 4 from the four corners of the injection molded packaging box, assisting the contact block 13 in demolding the injection molded packaging box from the lower mold 6. This reduces the probability of the injection molded packaging box sticking to the lower mold 6 when demolding at the four corners, reduces the probability of deformation and breakage during demolding, and improves the demolding quality.

[0064] Four support blocks 98 slide inside the B connecting ring 94. The support blocks 98 can slide on the outside of the cross connecting plate 95. The support blocks 98 are fixedly connected to the upper side of the base plate 15 and the lower side of the limiting plate 16. The support blocks 98 improve the connection strength between the base plate 15 and the limiting plate 16 and improve the stability of the mounting shell.

[0065] A connecting ring C 97 is provided on the outer side of connecting ring B 94. Connecting plate A 96 is fixedly connected to the inner side of connecting ring C 97. L-shaped limiting block 14, base plate 15, and limiting plate 16 can slide on the inner side of connecting ring C 97. Electric push rod B 91 is installed on the lower mold 6. The shaft end of electric push rod B 91 is connected to the upper side of connecting ring C 97. Electric push rod B 91 is connected to the power supply and controller through wires. After the upper mold 7 moves up and demolds the injection molded packaging box, electric push rod B 91 moves B 94 up and down through connecting ring C 97 and connecting plate A 96. Connecting ring B 94, in conjunction with cross connecting plate 95, moves push rod A 92 and push rod B 94 up and down. When rod 93 moves together, push rod 93 B moves along with contact block 13. At the same time, electric push rod 81 A moves upward with top block 12 A synchronously and at the same speed. This allows push rod 92 A and contact block 13 to demold the injection-molded packaging box from the lower mold 6. Push rod 92 A, contact block 13 A and top block 12 clamp the injection-molded packaging box and demold it from the lower mold 6 and upper mold 7. Then, push rod 92 A, contact block 13 A and top block 12 reset and detach from the injection-molded packaging box, allowing the injection-molded packaging box to be completely demolded. The injection-molded packaging box moves upward from the lower mold 6 stably and demolds. Compared with manual demolding, this method can demold more stably and quickly, improving demolding efficiency.

[0066] In the description of this invention, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0067] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0068] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. An injection-molded packaging box, comprising a housing (1), characterized in that, Also includes: Support ring (2), the support ring (2) is located outside the placement shell (1); A connecting ring (3), the A connecting ring (3) is fixedly connected to the inner side of the support ring (2) and the outer side of the placement shell (1); Four connecting blocks (4), the connecting blocks (4) are fixedly connected to the four corners of the inner side of the support ring (2), and the connecting blocks (4) are fixedly connected to the upper side of the A connecting ring (3); Four A auxiliary blocks (5) are fixed on the outside of the connecting block (4). The A auxiliary blocks (5) are fixedly connected to the upper side of the A connecting ring (3). The outside of the A auxiliary blocks (5) is an inclined surface and the inclined surface is inclined from the bottom to the top of the end close to the connecting block (4). Four upper auxiliary demolding units (8) are provided. Each upper auxiliary demolding unit (8) includes an A electric push rod (81). The upper mold (7) has four guide holes on its upper side. A guide cylinder (82) slides inside the guide holes. The guide cylinder (82) is fixedly connected to the upper side of the A top block (12). The A electric push rod (81) is located inside the guide cylinder (82). A limit block (83) is provided on the upper side of the A top block (12). The C limit block (83) slides inside the guide cylinder (82), and the guide cylinder (82) can slide in the A through hole. Two limit blocks are provided on the upper side of the guide cylinder (82). A positioning groove, with a positioning block (84) sliding inside the positioning groove, the positioning block (84) being fixedly connected to the outside of the C limiting block (83), the positioning block (84) being fixedly connected to the inside of the guide hole, the guide hole having two guide grooves inside, the guide block (85) sliding inside the guide groove, the guide block (85) being fixedly connected to the outside of the guide cylinder (82), the shaft end of the A electric push rod (81) and its other end being fixedly connected to the C limiting block (83) and the A top block (12) respectively, the A electric push rod (81) being connected to the power supply and controller through wires; The lower auxiliary demolding unit (9) includes four electric push rods (91). The upper side of the lower mold (6) is provided with four through holes (B) and through holes (C). Push rods (92) (A) slide inside the through holes (B) and push rods (93) (B) slide inside the through holes (C). Push rods (93) (B) are fixedly connected to the lower side of the contact block (13). The upper side of the base plate (15) is provided with a connecting ring (94) (B). A cross connecting plate (95) (B) is fixedly connected to the inner side of the connecting ring (94). Push rods (93) (B) are fixedly connected to the upper side of the cross connecting plate (95). Push rods (92) (A) are fixedly connected to the four corners of the upper side of the connecting ring (94). The connecting ring (94) (B) is slidable. Inside the L-shaped limiting block (14), four A connecting plates (96) are fixed on the outside of the B connecting ring (94). The A connecting plates (96) can slide between the two L-shaped limiting blocks (14). A C connecting ring (97) is provided on the outside of the B connecting ring (94). The A connecting plates (96) are fixedly connected to the inside of the C connecting ring (97). The L-shaped limiting block (14), the base plate (15) and the limiting plate (16) can slide inside the C connecting ring (97). The B electric push rod (91) is installed on the lower mold (6). The shaft end of the B electric push rod (91) is connected to the upper side of the C connecting ring (97). The B electric push rod (91) is connected to the power supply and the controller through wires.

2. The injection-molded packaging box according to claim 1, characterized in that, The placement shell (1), support ring (2), A connecting ring (3), connecting block (4) and A auxiliary block (5) are all made of plastic and are made as one piece.

3. A molding die for injection-molded packaging boxes, characterized in that, The injection-molded packaging box comprising any one of claims 1-2 further comprises: a lower mold (6) and an upper mold (7); A limiting block (10), the upper mold (7) is provided with an A forming groove on the lower side, the A limiting block (10) is fixed inside the A forming groove, the A limiting block (10) is fixed with a limiting ring (17) on the lower side, the limiting ring (17) is provided with a B positioning groove at the four corners, the A auxiliary block (5) can slide inside the B positioning groove, the A limiting block (10) is provided with an A injection hole on the upper side, the upper mold (7) is provided with a B injection hole, the A injection hole and the B injection hole are connected, the placement shell (1) can slide inside the limiting ring (17), the A limiting block (10) is located on the upper side of the placement shell (1) and the A limiting block (10) and the limiting ring (17) can slide inside the support ring (2), the support ring (2) can slide inside the A forming groove; B limiting block (11), the upper side of the lower mold (6) is provided with B forming groove, the B limiting block (11) is fixed inside the B forming groove, the B limiting block (11) can slide inside the placement shell (1), and the support ring (2) can slide inside the B forming groove. Four A top blocks (12) are located on the upper side of the connecting block (4). The upper side of the A limiting block (10) is provided with four A through holes. The A top blocks (12) slide inside the A through holes. Contact block (13), the upper side of the B limiting block (11) is provided with a positioning hole, and the contact block (13) can slide inside the positioning hole; A base plate (15) is provided on the upper side of the base plate (15), and four L-shaped limiting blocks (14) are fixed between the base plate (15) and the limiting plate (16). The limiting plate (16) is located on the lower side of the lower mold (6). Four upper auxiliary demolding units (8) are located between the top block (12) and the upper mold (7); The lower auxiliary demolding unit (9) is located between the L-shaped limiting block (14) and the contact block (13).

4. The injection molding die for a packaging box according to claim 3, characterized in that, Auxiliary block B (18) is provided on the outside of auxiliary block A (5). Auxiliary block B (18) is fixedly connected to the inside of positioning groove B. The inside of auxiliary block B (18) is an inclined surface and the inclined surface is inclined from the bottom to the top of the end close to the connecting block (4).

5. The injection molding die for a packaging box according to claim 3, characterized in that, Four support blocks (98) slide inside the B connecting ring (94). The support blocks (98) can slide outside the cross connecting plate (95). The support blocks (98) are fixedly connected to the upper side of the base plate (15) and the lower side of the limiting plate (16).

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