Injection molding packaging box and forming mold thereof

Abstract

The invention relates to the technical field of injection molding packaging boxes, in particular to an injection molding packaging box and a forming mold thereof, the injection molding packaging box comprises a placing shell, and further comprises a supporting ring located on the outer side of the placing shell; the connecting ring A is fixedly connected with the inner side of the supporting ring and the outer side of the placing shell; the four connecting blocks are fixedly connected with the four corners of the inner side of the supporting ring, and the connecting blocks are fixedly connected with the upper side of the connecting ring A; and the four auxiliary blocks A are fixed to the outer sides of the connecting blocks and fixedly connected with the upper side of the connecting ring A, the outer sides of the auxiliary blocks A are inclined planes, and the inclined planes incline from the lower sides to the ends, close to the connecting blocks, of the upper sides. By arranging the upper auxiliary demolding unit, the connecting block and the ejector block A, when the upper mold is separated, demolding from the upper mold is assisted from the four corners of the injection molding packaging box, the probability that the injection molding packaging box adheres to the upper mold is reduced, and therefore the probability that the injection molding packaging box is damaged and deformed is reduced, and the machining quality is improved.

Description

Technical Field

[0001] The invention relates to the technical field of injection molding packaging boxes, and in particular to an injection molding packaging box and a molding mold thereof. Background Art

[0002] Plastic boxes are transparent folding boxes, cylinders, lid boxes, handbags, hanging cards and other related plastic products made of PVC / PET / PP / PS, etc., which can be printed with UV offset printing, silk screen printing, hot stamping / silver, frosting and other printing effects. Plastic boxes have the characteristics of increasing user experience, permanent and durable packaging, moisture-proof, waterproof, high toughness, strong transportation safety performance, and improving product grade.

[0003] Plastic boxes are divided into injection molded packaging boxes and blister packaging boxes according to the processing method. At the same time, the molds used for different packaging boxes are also different. The injection mold is usually an upper and lower mold. A groove is formed on the contact surface of the two molds. During processing, the two molds are in contact, and then the material is injected from the upper mold. The material flows into the groove and gradually takes shape. Then the upper mold is moved up, and the injection molded packaging box is demolded from the lower mold.

[0004] When the injection mold is opened, if the upper mold is attached to the injection molding box when it moves upward, it will move up with the injection molding box. Since it is not smoothly demolded from the lower mold, the injection molding box will be stuck on the lower mold, causing the injection molding box to be deformed or damaged, affecting the processing quality. To this end, we propose an injection molding box and its molding mold to solve the above problems. Summary of the invention

[0005] The purpose of the present invention is to solve the problem in the prior art that when the injection mold is opened, if the upper mold sticks to the injection molding box when moving upward, the injection molding box will move upward a little. Since the mold is not demolded smoothly from the lower mold, the injection molding box will be stuck on the lower mold, causing the injection molding box to be deformed or damaged, thereby affecting the processing quality. An injection molding box and its molding mold are proposed.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] Design an injection molding packaging box and its molding mold, including a placement shell, and also including:

[0008] A support ring, the support ring being located outside the placement shell;

[0009] A connecting ring, wherein the 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, the connecting blocks are fixedly connected to the four inner corners 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, wherein the A auxiliary blocks are fixed on the outside of the connection block, the A auxiliary blocks are fixedly connected to the upper side of the A connection ring, and the outer side of the A auxiliary block is an inclined surface which inclines from the lower side to the upper side close to one end of the connection block.

[0012] Preferably, the placement shell, support ring, A connecting ring, connecting block and A auxiliary block are all made of plastic material and are made in one piece.

[0013] By adopting the above technical solution, the connection block and the A auxiliary block improve the overall connection stability of the injection molding packaging box.

[0014] An injection molding packaging box forming mold, comprising an injection molding packaging box according to any one of claims, and further comprising: a lower mold and an upper mold;

[0015] A limit block, the lower side of the upper mold is provided with an A molding groove, the A limit block is fixed on the inner side of the A molding groove, the lower side of the A limit block is fixed with a limit ring, the four corners of the limit ring are provided with B positioning grooves, the A auxiliary block can slide on the inner side of the B positioning groove, the upper side of the A limit block is provided with an A injection hole, the upper side of the upper mold is provided with a B injection hole, the A injection hole is communicated with the B injection hole, the placement shell can slide on the inner side of the limit ring, the A limit block is located on the upper side of the placement shell, and the A limit block and the limit ring can slide on the inner side of the support ring, and the support ring can slide on the inner side of the A molding groove;

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

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

[0018] A contact block, wherein a positioning hole is provided on the upper side of the B limit block, and the contact block can slide inside the positioning hole;

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

[0020] Four upper auxiliary demoulding units, wherein the upper auxiliary demoulding units are located between the A top block and the upper mold;

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

[0022] Preferably, a B auxiliary block is provided on the outside of the A auxiliary block, and the B auxiliary block is fixedly connected to the inner side of the B positioning groove. The inner side of the B auxiliary block is an inclined surface and the inclined surface is inclined from the lower side to the upper side close to one end of the connecting block.

[0023] By adopting the above technical solution, the B auxiliary block cooperates with the A auxiliary block to make it easier for the injection molded packaging box to be removed from the upper mold.

[0024] Preferably, the upper auxiliary demolding unit includes an A electric push rod, four guide holes are provided on the upper side of the upper mold, a guide cylinder is slidably provided inside the guide hole and the guide cylinder can slide in the A through hole, the guide cylinder is fixedly connected to the upper side of the A top block, the A electric push rod is located on the inner side of the guide cylinder, a C limit block is provided on the upper side of the A top block, the C limit block slides on the inner side of the guide cylinder, two A positioning grooves are provided on the upper side of the guide cylinder, a positioning block is slidably provided inside the A positioning groove, the positioning block is fixedly connected to the outer side of the C limit block, the positioning block is fixedly connected to the inner side of the guide hole, two guide grooves are provided inside the guide hole, a guide block is slidably provided inside the guide groove, the guide block is fixedly connected to the outer side of the guide cylinder, the shaft end of the A electric push rod and the other end thereof are respectively fixedly connected between the C limit block and the A top block, and the A electric push rod is connected to a power supply and a controller through a wire.

[0025] By adopting the above technical solution, the upper auxiliary demoulding unit can carry the A top block to the injection molding packaging box, so that when the upper mold moves upward, the injection molding packaging box can be better demoulded from the upper mold.

[0026] Preferably, the lower auxiliary demoulding unit includes four B electric push rods, four B through holes and C through holes are provided on the upper side of the lower mold, A push rods are slid inside the B through holes, B push rods are slid inside the C through holes, the B push rods are fixedly connected to the lower side of the contact block, a B connecting ring is provided on the upper side of the bottom plate, a cross connecting plate is fixed on the inner side of 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 on the inner side of the L-shaped limit block, four A connecting plates are fixed on the outer side of the B connecting ring, the A connecting plate can slide between two L-shaped limit blocks, a C connecting ring is provided on the outer side of the B connecting ring, the A connecting plate is fixedly connected to the inner side of the C connecting ring, the L-shaped limit block, the bottom plate and the limit plate can slide on the inner side of the C connecting ring, the B electric push rods are installed on the lower mold, the shaft end of the B electric push rods is connected to the upper side of the C connecting ring, and 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 demoulding unit cooperates with the contact block to make it easier for the injection molded packaging box to be demoulded from the lower mold.

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

[0030] The present invention provides an injection molding packaging box and a molding mold thereof, which have the following beneficial effects:

[0031] 1. By setting the upper auxiliary demoulding unit, connecting block and A top block, when the upper mold is detached, the four corners of the injection molding box are assisted to demould from the upper mold, which reduces the probability of adhesion between the injection molding box and the upper mold, thereby reducing the probability of damage and deformation of the injection molding box and improving the processing quality.

[0032] 2. By setting up the upper auxiliary demoulding unit and the lower auxiliary demoulding unit, demoulding from the lower mold and the upper mold can be carried out more smoothly, thereby improving the demoulding efficiency.

[0033] 3. By setting the connecting block and the A auxiliary block, the overall stability of the injection molding box is improved, and the connecting block increases the thickness of the injection molding box at the contact point between the upper auxiliary demoulding unit and the lower auxiliary demoulding unit and the injection molding box, thereby reducing the probability of damage to the injection molding box. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 A schematic diagram of the three-dimensional structure of an injection-molded packaging box and a molding mold thereof proposed by the present invention;

[0035] Figure 2 This is a schematic diagram of the front side top view of a three-dimensional structure of an injection molding packaging box and a molding mold thereof proposed by the present invention;

[0036] Figure 3 The present invention proposes Figure 2 A partial enlarged schematic diagram of the three-dimensional structure of the middle A area;

[0037] Figure 4 The present invention proposes Figure 2 A schematic diagram of the partially enlarged three-dimensional structure of the middle B area;

[0038] Figure 5 This is a schematic diagram of a front-side cutaway three-dimensional structure of an injection-molded packaging box and a molding mold thereof proposed by the present invention;

[0039] Figure 6 The present invention proposes Figure 5 A schematic diagram of the partially enlarged three-dimensional structure of the middle C area;

[0040] Figure 7 The present invention proposes Figure 5A schematic diagram of the three-dimensional structure of a partial enlargement of the middle D area;

[0041] Figure 8 The present invention proposes Figure 5 A schematic diagram of the partially enlarged three-dimensional structure of the middle E area;

[0042] Fig. 9 It is a right side cutaway three-dimensional structural schematic diagram of an injection molding packaging box and its molding mold proposed by the present invention;

[0043] Fig.10 The present invention proposes Fig. 9 A schematic diagram of the three-dimensional structure of the local enlarged F area in the middle;

[0044] Fig.11 The present invention proposes Fig. 9 A schematic diagram of the three-dimensional structure of a partial enlargement of the middle G area;

[0045] Fig.12 The present invention proposes Fig. 9 Schematic diagram of the partially enlarged three-dimensional structure of the middle H area.

[0046] In the figure: 1. Placement shell; 2. Support ring; 3. A connecting ring; 4. Connecting block; 5. A auxiliary block; 6. Lower mold; 7. Upper mold; 8. Upper auxiliary demoulding unit; 81. A electric push rod; 82. Guide cylinder; 83. C limit block; 84. Positioning block; 85. Guide block; 9. Lower auxiliary demoulding 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 limit block; 11. B limit block; 12. A top block; 13. Contact block; 14. L-shaped limit block; 15. Bottom plate; 16. Limit plate; 17. Limit ring; 18. B auxiliary block. DETAILED DESCRIPTION

[0047] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0048] Reference Figure 1-12 , an injection molding packaging box and its molding mold, including a placement shell 1, and also including: a support ring 2, an A connection ring 3, four connection blocks 4, and four A auxiliary blocks 5;

[0049] The support ring 2 is located outside the placement shell 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 molding 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 stability inside the support ring 2, thereby improving the overall stability of the injection molding packaging box. At the same time, the connecting block 4 reduces the probability of the upper auxiliary demoulding unit 8 and the lower auxiliary demoulding unit 9 causing damage to the injection molding packaging box below.

[0052] The Auxiliary block 5 is fixed on the outside of the connecting block 4. The Auxiliary block 5 is fixedly connected to the upper side of the A connecting ring 3. The outer side of the Auxiliary block 5 is an inclined surface and the inclined surface is inclined from the lower side to the upper side close to one end of the connecting block 4. The Auxiliary block 5 improves the function of the connecting block 4. At the same time, the inclined surface makes it easy to demold the injection molding packaging box.

[0053] The placement shell 1, the support ring 2, the A connection ring 3, the connection block 4 and the A auxiliary block 5 are all made of plastic and are made in one piece.

[0054] An injection molding packaging box forming mold, comprising an injection molding packaging box according to any one of claims 1 to 2, and further comprising: an A limit block 10, a B limit block 11, four A top blocks 12, four upper auxiliary demoulding units 8, a contact block 13, a bottom plate 15, a lower auxiliary demoulding unit 9, a lower mold 6 and an upper mold 7;

[0055] An A molding groove is provided on the lower side of the upper mold 7, an A limit block 10 is fixed on the inner side of the A molding groove, a limit ring 17 is fixed on the lower side of the A limit block 10, and B positioning grooves are provided at the four corners of the limit ring 17. The A auxiliary block 5 can slide on the inner side of the B positioning groove, an A injection hole is provided on the upper side of the A limit block 10, and a B injection hole is provided on the upper side of the upper mold 7. The A injection hole is communicated with the B injection hole. The placement shell 1 can slide on the inner side of the limit ring 17. The A limit block 10 is located on the upper side of the placement shell 1, and the A limit block 10 and the limit ring 17 can slide on the inner side of the support ring 2, and the support ring 2 can slide on the inner side of the A molding groove;

[0056] A B forming groove is provided on the upper side of the lower mold 6, a 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] A B auxiliary block 18 is disposed outside the A auxiliary block 5, and the B auxiliary block 18 is fixedly connected to the inner side of the B positioning groove, and the inner side of the B auxiliary block 18 is an inclined surface, and the inclined surface is inclined from the lower side to the upper side close to one end of the connecting block 4;

[0058] The A molding groove on the upper mold 7 cooperates with the A limit block 10, the limit ring 17 and the B auxiliary block 18 and the B molding groove on the lower mold 6 cooperates with the B limit block 11 to form the shape of the injection molded packaging box, and then the raw materials are injected from the A injection hole and the B injection hole to form the injection molded packaging box (the injection molded packaging box is in an inverted shape at this time), and then the upper mold 7 is moved upward away from the lower mold 6, and the A auxiliary block 5 cooperates with the B auxiliary block 18 to make it easier to demold the injection molded packaging box from the upper mold 7.

[0059] The A top block 12 is located on the upper side of the connecting block 4, and four A through holes are provided on the upper side of the A limit block 10, and the A top block 12 slides inside the A through holes;

[0060] The upper auxiliary demoulding unit 8 is located between the A top block 12 and the upper mold 7. The upper auxiliary demoulding unit 8 includes an A electric push rod 81. Four guide holes are provided on the upper side of the upper mold 7. A guide cylinder 82 is slidably provided inside the guide hole and the guide cylinder 82 can slide in the A through hole. The guide cylinder 82 is fixedly connected to the upper side of the A top block 12. The guide cylinder 82 guides the A top block 12 so that the A top block 12 can move more smoothly into the A through hole. The A electric push rod 81 is located on the inner side of the guide cylinder 82. A C 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. Two A positioning grooves are provided on the upper side of the guide cylinder 82. A positioning block 84 slides inside the A positioning groove. The positioning block 84 limits the movement of the guide cylinder 82. The positioning block 84 is fixedly connected to the outer side of the C limit block 83. The positioning block 84 is fixedly connected to the inner side of the guide hole. The guide blocks 85 are provided on the inner side of the guide holes for guiding and limiting the movement of the guide cylinder 82. The guide blocks 85 are fixedly connected to the outer side of the guide cylinder 82. The shaft end of the A electric push rod 81 and the other end thereof are fixedly connected to the C limit block 83 and the A top block 12 respectively. The A electric push rod 81 is connected to the power supply and the controller through a wire. When the upper mold 7 moves upward, the A electric push rod 81 moves downward with the A top block 12 through the C limit block 83 at the speed at which the upper mold 7 moves upward, so that the A top block 12 is always against the upper side of the A connecting ring 3 and the connecting block 4 of the injection molding packaging box, so that the injection molding packaging box will not move along with the upper mold 7 moving upward, and can be more conveniently and completely demoulded from the upper mold 7, thereby reducing the probability of damage and deformation of the injection molding packaging box during demoulding, and improving the demoulding quality.

[0061] A positioning hole is provided on the upper side of the B limit block 11, and the contact block 13 can slide inside the positioning hole;

[0062] A limit plate 16 is provided on the upper side of the bottom plate 15, and four L-shaped limit blocks 14 are fixed between the bottom plate 15 and the limit plate 16. The limit plate 16 is located at the lower side of the lower mold 6. The bottom plate 15, the limit plate 16 and the L-shaped limit blocks 14 constitute an installation shell for installing the lower auxiliary demolding unit 9 described below.

[0063] The lower auxiliary demoulding unit 9 is located between the L-shaped limit block 14 and the contact block 13. The lower auxiliary demoulding unit 9 includes four B electric push rods 91. Four B through holes and C through holes are provided on the upper side of the lower mold 6. A push rods 92 slide inside the B through holes, and B push rods 93 slide inside the C through holes. The B push rods 93 are fixedly connected to the lower side of the contact block 13. A B connecting ring 94 is provided on the upper side of the bottom plate 15. A cross connecting plate 95 is fixed inside the B connecting ring 94. 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 A connecting plates 96 are fixed on the outside of the B connecting ring 94. The A connecting plate 96 can slide between the two L-shaped limit blocks 14, and the B connecting ring 94 can slide on the inside of the L-shaped limit block 14. The B push rod 93 brings the contact block 13 to demould the injection molding box from the lower mold 6, and then the A push rod 92 pushes the connecting block 4 to assist the contact blocks 13 at the four corners of the injection molding box to demould the injection molding box from the lower mold 6, thereby reducing the probability of adhesion between the four corners of the injection molding box and the lower mold 6 when demoulding, reducing the probability of deformation and damage of the injection molding box when demoulding, and improving the demoulding quality.

[0064] There are four sliding support blocks 98 on the inner side of the B connecting ring 94. The support blocks 98 can slide on the outer side of the cross connecting plate 95. The support blocks 98 are fixedly connected to the upper side of the bottom plate 15 and the lower side of the limit plate 16. The support blocks 98 improve the connection strength between the bottom plate 15 and the limit plate 16, and improve the stability of the installation shell.

[0065] A C connecting ring 97 is arranged on the outside of the B connecting ring 94, and an A connecting plate 96 is fixedly connected to the inside of the C connecting ring 97. The L-shaped limit block 14, the bottom plate 15 and the limit plate 16 can slide on the inside of the C connecting ring 97. The B electric push rod 91 is installed on the lower mold 6, and 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 a wire. When the upper mold 7 moves up to demould the injection molding packaging box, the B electric push rod 91 moves up and down with the B connecting ring 94 through the C connecting ring 97 and the A connecting plate 96. The B connecting ring 94 cooperates with the cross connecting plate 95 to carry the A push rod 92 and the B push rod 93. The rod 93 moves together, the B push rod 93 will move with the contact block 13, and the A electric push rod 81 will move up with the A top block 12 synchronously and at the same speed, so that the A push rod 92 and the contact block 13 can demould the injection molding box from the lower mold 6, and the A push rod 92, the contact block 13 and the A top block 12 can clamp the injection molding box and demould it from the lower mold 6 and the upper mold 7. Then the A push rod 92, the contact block 13 and the A top block 12 are reset and separated from the injection molding box, so that the injection molding box is completely demoulded, and the injection molding box is stably moved up and demoulded from the lower mold 6 as a whole, which can be demoulded more stably and quickly than manual demoulding, thereby improving the demoulding efficiency.

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

[0067] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" 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 it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0068] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An injection-molded packaging box, comprising a housing (1), characterized in that: Also includes: A support ring (2), wherein the support ring (2) is located outside the placement shell (1); A connecting ring (3), wherein the A connecting ring (3) is fixedly connected to the inner side of the supporting ring (2) and the outer side of the placement shell (1); Four connecting blocks (4), wherein the connecting blocks (4) are fixedly connected to the four inner corners 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), wherein the A auxiliary blocks (5) are fixed on the outside of the connection block (4), the A auxiliary blocks (5) are fixedly connected to the upper side of the A connection ring (3), and the outer side of the A auxiliary block (5) is an inclined surface, and the inclined surface is inclined from the lower side to the upper side close to one end of the connection block (4).

2. The injection molding packaging box according to claim 1, characterized in that: The placement shell (1), the support ring (2), the A connection ring (3), the connection block (4) and the A auxiliary block (5) are all made of plastic material and are integrally manufactured.

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

4. The injection molding mold for a packaging box according to claim 3, characterized in that: A B auxiliary block (18) is arranged outside the A auxiliary block (5), and the B auxiliary block (18) is fixedly connected to the inside of the B positioning groove. The inside of the B auxiliary block (18) is an inclined surface, and the inclined surface is inclined from the lower side to the upper side close to one end of the connecting block (4).

5. The injection molding mold for packaging box according to claim 3, characterized in that: The upper auxiliary demoulding unit (8) comprises an A electric push rod (81), four guide holes are arranged on the upper side of the upper mold (7), a guide cylinder (82) is slidably arranged 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 C limit block (83) is arranged 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, and two A positioning grooves are arranged on the upper side of the guide cylinder (82). A positioning block (84) is slidably arranged inside the A positioning groove, the positioning block (84) is fixedly connected to the outside of the C limit block (83), the positioning block (84) is fixedly connected to the inside of the guide hole, two guide grooves are arranged inside the guide hole, a guide block (85) is slidably arranged inside the guide groove, the guide block (85) is fixedly connected to the outside of the guide cylinder (82), the shaft end of the A electric push rod (81) and the other end thereof are respectively fixedly connected to the C limit block (83) and the A top block (12), and the A electric push rod (81) is connected to a power supply and a controller via a wire.

6. The injection molding mold for a packaging box according to claim 3, characterized in that: The lower auxiliary demoulding unit (9) comprises four B electric push rods (91), and the upper side of the lower mold (6) is provided with four B through holes and a C through hole, and an A push rod (92) is slidably arranged inside the B through hole, and a B push rod (93) is slidably arranged inside the C through hole, and the B push rod (93) is fixedly connected to the lower side of the contact block (13). A B connecting ring (94) is provided on the upper side of the bottom plate (15), and a cross connecting plate (95) is fixedly arranged inside the B connecting ring (94), and the B push rod (93) is fixedly connected to the upper side of the cross connecting plate (95), and the A push rod (92) is fixedly connected to the four corners of the upper side of the B connecting ring (94), and the B connecting ring (94) can slide in an L-shaped limit The inner side of the block (14), the outer side of the B connecting ring (94) is fixed with four A connecting plates (96), the A connecting plate (96) can slide between the two L-shaped limit blocks (14), the outer side of the B connecting ring (94) is provided with a C connecting ring (97), the A connecting plate (96) is fixedly connected to the inner side of the C connecting ring (97), the L-shaped limit block (14), the bottom plate (15) and the limit plate (16) can slide on the inner side of 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), and the B electric push rod (91) is connected to the power supply and the controller through a wire.

7. The injection molding mold for a packaging box according to claim 6, characterized in that: Four support blocks (98) are slidably mounted on the inner side of the B connection ring (94). The support blocks (98) can slide on the outer side of the cross connection plate (95). The support blocks (98) are fixedly connected to the upper side of the bottom plate (15) and the lower side of the limit plate (16).

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