Injection mold for file box
By introducing a sandwich panel and insulation module into the injection mold of the document box, the problems of poor fluidity of the molten material and slow cooling speed were solved, and uniform molding and efficient production of the document box were achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-11
- Publication Date
- 2026-03-27
AI Technical Summary
The existing injection mold for document boxes lacks heat preservation function, resulting in poor fluidity of the molten material, uneven molding, slow cooling speed, and low production efficiency.
The injection mold design incorporates a sandwich panel and insulation module. The sandwich panel and insulation module keep the molten material warm to ensure its fluidity, and the cooling process is accelerated through cooling holes.
It improves the fluidity of the molten material, avoids uneven thickness of the document boxes, reduces the defect rate, accelerates the cooling speed, and improves production efficiency.
Smart Images
Figure CN224044427U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to a kind of injection mould of file box. BACKGROUND
[0002] File box has extensive application in office and study, mainly used for classifying and arranging various files and data, so that working environment and learning environment are more well-organized, and plastic file box is very popular because it has good transparency, durability and plasticity, and performs well in file management and storage.
[0003] Since plastic file box is plastic part, its production is realized by relying on matched mold and with the help of injection molding machine; since the thickness of file box is thin, the existing forming mold lacks heat preservation function, and the heat of molten material is inevitably transferred to end plate and movable die plate before entering forming mold cavity, so the temperature has dropped, and in order to form file box with thin thickness, the cross-sectional area of forming mold cavity is also small, and the flowability of molten material after cooling is poor, which cannot quickly and uniformly fill the forming mold cavity, thereby causing the phenomenon of uneven thickness of file box, and even causing cavity, so as to cause high defective rate; in addition, the cooling speed of existing forming mold is also slow, and file box needs to wait for a long time to be ejected, thereby causing low production efficiency, which needs to be further improved. UTILITY MODEL CONTENT
[0004] In view of the above status of prior art, the technical problem to be solved by the utility model is to provide an injection mold for file box, which can effectively reduce defective rate, accelerate cooling speed and improve production efficiency.
[0005] The utility model solves the above technical problem by the technical scheme that an injection mold for file box comprises movable die module and fixed die module arranged in front and back and matched with each other, end plate fixed on the front side of movable die module, and bottom plate fixed on the rear side of fixed die module, and is characterized by:
[0006] The movable die module and the fixed die module are further provided with interlayer plate, the front side outer wall of the fixed die module is outwardly formed with first protrusion and second protrusion arranged in upper and lower positions respectively, and correspondingly, the interlayer plate is provided with rectangular cavity, the first protrusion and the second protrusion are embedded in the rectangular cavity, and the end faces of the first protrusion and the second protrusion are extended to the front of the interlayer plate;
[0007] The rear side outer wall of the movable die module is provided with first mold cavity and second mold cavity arranged in upper and lower positions respectively and matched with the first protrusion and the second protrusion respectively, and the inner walls of the proximal sides of the first mold cavity and the second mold cavity form separation strip;
[0008] The first protruding block and the second protruding block are connected by a connecting block, and the left and right outer walls of the connecting block are provided with a gap between the first protruding block and the second protruding block.
[0009] The left and right inner walls of the rectangular cavity are provided with a positioning block symmetrically arranged towards the inside of the rectangular cavity.
[0010] Preferably, a plurality of cooling hole combinations are arranged on the rear outer wall of the fixed die block, and correspondingly, a plurality of through holes are arranged on the left and right outer walls of the fixed die block, the cooling hole combinations include a plurality of cooling holes arranged from left to right, each through hole penetrates the inside of each cooling hole in the corresponding cooling hole combination, and the bottom of each cooling hole extends into the inside of the first protruding block or the second protruding block.
[0011] Preferably, a heat preservation module is arranged between the end plate and the movable die block, the heat preservation module includes a seat plate fixed between the end plate and the movable die block, and an X-shaped heat preservation block fixed between the end plate and the seat plate, a first cavity is arranged on the front outer wall of the seat plate, and correspondingly, a second cavity is arranged on the rear outer wall of the end plate and matched with the first cavity, and the front and rear outer walls of the X-shaped heat preservation block are respectively fixed on the bottom surfaces of the second cavity and the first cavity.
[0012] Preferably, a feeding hole is arranged in the center of the X-shaped heat preservation block, a shunt hole is arranged between the outer wall of each corner of the X-shaped heat preservation block and the inner wall of the feeding hole, four discharge holes are arranged between the front and rear outer walls of the X-shaped heat preservation block and symmetrically distributed in pairs, the four discharge holes are respectively intersected with and communicated with the four shunt holes, and four extrusion holes are arranged on the bottom surface of the first cavity and respectively corresponded with and communicated with the four discharge holes.
[0013] Preferably, four counterbores are arranged on the front outer wall of the movable die block and respectively corresponded with and communicated with the four extrusion holes, a feeding hole is arranged between the bottom surface of each upper counterbores and the bottom surface of the first cavity, and a feeding hole is arranged between the bottom surface of each lower counterbores and the bottom surface of the second cavity.
[0014] Preferably, a plurality of vertically arranged and left-to-right distributed rib packages are formed on the end face of the first protruding block, correspondingly, a plurality of vertically arranged and left-to-right distributed rib grooves are formed on the bottom surface of the first cavity, and a sink cavity is arranged on the bottom surface of the second cavity.
[0015] Preferably, a stepped ring is formed on the end outer wall of the second protrusion in front of the connecting block, and a plurality of opening grooves are formed on the upper part of the stepped ring and sequentially distributed from left to right, and correspondingly, a plurality of notch groove combinations are formed on the end face of the partition strip and sequentially arranged from left to right, each notch groove combination is matched with a corresponding opening groove, and each notch groove combination comprises two notch grooves which are symmetrically arranged on the upper and lower two side edges of the end face of the partition strip.
[0016] Preferably, a first recess and a second recess are formed on the upper outer wall of the first protrusion and are arranged on the left and right sides, respectively, and correspondingly, a first clamping block and a second clamping block are formed on the upper inner wall of the rectangular cavity and are arranged on the left and right sides, respectively, the first clamping block and the second clamping block are embedded in the first recess and the second recess, respectively, a third recess and a fourth recess are formed on the lower outer wall of the second protrusion and are arranged on the left and right sides, respectively, and correspondingly, a third clamping block and a fourth clamping block are formed on the lower inner wall of the rectangular cavity and are arranged on the left and right sides, respectively, the third clamping block and the fourth clamping block are embedded in the third recess and the fourth recess, respectively.
[0017] Preferably, a first core block and a second core block are further formed between the front outer wall of the first clamping block and the front outer wall of the interlayer plate and the front outer wall of the second clamping block, respectively, and correspondingly, a first notch and a second notch are formed on the upper inner wall of the first mold cavity and are arranged on the left and right sides, respectively, a first step block and a second step block are further formed between the inner wall of the first notch and the bottom surface of the first mold cavity and the inner wall of the second notch, respectively, and the end faces of the first step block and the second step block are matched with the end faces of the first core block and the second core block, respectively.
[0018] Preferably, a third core block and a fourth core block are further formed between the front outer wall of the third clamping block and the front outer wall of the interlayer plate and the front outer wall of the fourth clamping block, respectively, and correspondingly, a third notch and a fourth notch are formed on the lower inner wall of the first mold cavity and are arranged on the left and right sides, respectively, a third step block and a fourth step block are further formed between the inner wall of the third notch and the bottom surface of the first mold cavity and the inner wall of the fourth notch, respectively, and the end faces of the third step block and the fourth step block are matched with the end faces of the third core block and the fourth core block, respectively.
[0019] Compared with the prior art, the utility model has the advantages that the utility model can effectively keep the molten material through the heat preservation module, thereby preventing the temperature of the molten material from dropping to ensure that the molten material has good fluidity, thereby quickly and uniformly filling the forming mold cavity to avoid the phenomenon that the file box is not uniform in thickness, thereby effectively reducing the defective rate; in addition, the cooling speed is also accelerated to shorten the time interval of the file box out of the mold, thereby improving the production efficiency. BRIEF DESCRIPTION OF DRAWINGS
[0020] The above and other features, advantages and aspects of embodiments of the present application will become more apparent by describing in detail the following specific embodiments thereof with reference to the attached drawings; throughout the drawings, like or similar components are referred to with like or similar reference numerals, it is to be understood that the drawings are schematic, and the sizes of the components and elements do not necessarily correspond to the actual ones; in the drawings:
[0021] Fig. 1 It is the right front exploded view of the utility model;
[0022] Fig. 2 It is the right rear side view of the utility model's movable module;
[0023] Fig. 3 It is the right rear side view of the utility model's fixed module;
[0024] Fig. 4 It is the utility model's local enlarged view at A;
[0025] Fig. 5 It is the right rear side view of the utility model's X-shaped heat preservation block and end plate;
[0026] Fig. 6 It is the right rear side view of the utility model's file box. DETAILED DESCRIPTION
[0027] Unless otherwise defined, technical terms or scientific terms used in the present application shall have the ordinary meaning commonly understood by a person having ordinary skill in the art to which the present application belongs. The terms "first", "second" and similar words of comparison used in the present application do not denote any order, quantity or importance, but are only used to distinguish different components. The terms "comprising" or "including" and similar words of like meaning are intended to encompass the elements or components listed after such words, as well as equivalents thereof, without excluding other elements or components. The terms "connected" or "coupled" and similar words of like meaning are not limited to physical or mechanical connections or couplings, but can include electrical connections or couplings, whether direct or indirect. The terms "upper", "lower", "left", "right" and the like are only used to indicate relative positions, and when the absolute positions of the described objects are changed, the relative positions may also be changed accordingly.
[0028] In order to keep the following description of the embodiments of the present application clear and concise, detailed descriptions of known functions and known components are omitted.
[0029] As shown in Figs. 1-6 An injection mold for a file box, comprising a movable module 2 and a fixed module 3 arranged in front of and behind each other and cooperating with each other, an end plate 1 fixed to the front side of the movable module 2, and a bottom plate 4 fixed to the rear side of the fixed module 3;
[0030] A sandwich plate 5 is further arranged between the movable mold 2 and the fixed mold 3, and a first protrusion 31 and a second protrusion 32 are respectively formed on the front side outer wall of the fixed mold 3, and a rectangular cavity 51 is correspondingly formed in the sandwich plate 5, and the first protrusion 31 and the second protrusion 32 are embedded in the rectangular cavity 51, and the end faces of the first protrusion 31 and the second protrusion 32 extend to the front of the sandwich plate 5;
[0031] A first mold cavity 21 and a second mold cavity 22 are respectively formed on the rear side outer wall of the movable mold 2 and are respectively matched with the first protrusion 31 and the second protrusion 32, and a partition strip 23 is formed between the proximal side inner walls of the first mold cavity 21 and the second mold cavity 22;
[0032] A connecting block 34 is further formed between the proximal side outer walls of the first protrusion 31 and the second protrusion 32, and a gap 39 is formed between the left and right side outer walls of the connecting block 34 and the proximal side outer walls of the first protrusion 31 and the second protrusion 32, and a connecting groove 310 is formed between the front side outer wall of the connecting block 34 and the proximal side outer walls of the first protrusion 31 and the second protrusion 32 and is matched with the partition strip 23;
[0033] A positioning block 510 is formed on the left and right side inner walls of the rectangular cavity 51 and faces the interior of the rectangular cavity 51, and the two positioning blocks 510 are respectively embedded in the two gaps 39;
[0034] A first recess 37 and a second recess 35 are respectively formed on the upper side outer wall of the first protrusion 31, and a first clamping block 56 and a second clamping block 53 are correspondingly formed on the upper side inner wall of the rectangular cavity 51 and face the interior of the rectangular cavity 51, and the first clamping block 56 and the second clamping block 53 are respectively embedded in the first recess 37 and the second recess 35.
[0035] A first core block 57 and a second core block 55 are respectively formed between the front side outer walls of the first clamping block 56 and the second clamping block 53 and the front side outer wall of the sandwich plate 5, and a first gap 212 and a second gap 27 are correspondingly formed on the upper side inner wall of the first mold cavity 21, and a first step block 213 and a second step block 26 are respectively formed between the inner walls of the first gap 212 and the second gap 27 and the bottom surface of the first mold cavity 21, and the end faces of the first step block 213 and the second step block 26 are respectively matched with the end faces of the first core block 57 and the second core block 55.
[0036] A third recess 38 and a fourth recess 36 are respectively formed on the lower side outer wall of the second protrusion 32, and a third clamping block 59 and a fourth clamping block 52 are correspondingly formed on the lower side inner wall of the rectangular cavity 51 and face the interior of the rectangular cavity 51, and the third clamping block 59 and the fourth clamping block 52 are respectively embedded in the third recess 38 and the fourth recess 36.
[0037] The third core block 58 and the fourth core block 54 are respectively formed between the front side outer wall of the third clamping block 59 and the fourth clamping block 52 and the front side outer wall of the interlayer sheet 5, and correspondingly, the third notch 211 and the fourth notch 25 are respectively distributed left and right on the lower side inner wall of the first mold cavity 21, and the third step block 210 and the fourth step block 24 are respectively formed between the inner wall of the third notch 211 and the fourth notch 25 and the bottom surface of the first mold cavity 21, and the end surface of the third step block 210 and the fourth step block 24 respectively matches the end surface of the third core block 58 and the fourth core block 54.
[0038] A plurality of cooling hole combinations are sequentially distributed from top to bottom on the rear side outer wall of the fixed mold block 3, and correspondingly, a plurality of through holes 311 are sequentially distributed from top to bottom between the left and right side outer walls of the fixed mold block 3, the cooling hole combination includes a plurality of cooling holes 312 sequentially arranged from left to right, each through hole 311 penetrates the inside of each cooling hole 312 in the corresponding cooling hole combination, and the bottom of each cooling hole 312 extends into the inside of the first protrusion 31 or the second protrusion 32.
[0039] A plurality of muscle bundles 313 are sequentially distributed from left to right and vertically arranged forward on the end surface of the first protrusion 31, and correspondingly, a plurality of muscle grooves 29 are sequentially distributed from left to right and vertically arranged backward on the bottom surface of the first mold cavity 21.
[0040] A sink cavity 291 is formed on the bottom surface of the second mold cavity 22.
[0041] A step ring 314 is formed on the end outer wall of the second protrusion 32 in front of the connecting block 34, a plurality of opening grooves 315 are sequentially distributed from left to right on the upper part of the step ring 314, and correspondingly, a plurality of notch groove combinations are sequentially arranged from left to right on the end surface of the partition strip 23, each notch groove combination matches a corresponding opening groove 315, and the notch groove combination includes two notch grooves 231 symmetrically arranged on the upper and lower side edges of the end surface of the partition strip 23.
[0042] A heat preservation module is further arranged between the end plate 1 and the movable mold block 2, the heat preservation module includes a seat plate 6 fixed between the end plate 1 and the movable mold block 2, and an X-shaped heat preservation block 7 fixed between the end plate 1 and the seat plate 6, a first mold cavity 61 is formed on the front side outer wall of the seat plate 6, and correspondingly, a second mold cavity 11 matched with the first mold cavity 61 is formed on the rear side outer wall of the end plate 1, and the front and rear side outer walls of the X-shaped heat preservation block 7 are respectively fixed on the bottom surfaces of the second mold cavity 11 and the first mold cavity 61.
[0043] The X-shaped heat preservation block 7 is provided with a feeding hole 71 in the center, and a shunt hole 72 is arranged between the outer wall of each corner of the X-shaped heat preservation block 7 and the inner wall of the feeding hole 71. Four discharge holes 73 are symmetrically arranged between the outer walls of the front and rear sides of the X-shaped heat preservation block 7, and each of the four discharge holes 73 intersects and communicates with the four shunt holes 72. Four extrusion holes 62 are arranged on the bottom surface of the first cavity 61 and correspond to the four discharge holes 73.
[0044] Four counterbores 221 are arranged on the front outer wall of the movable module 2 and correspond to the four extrusion holes 62. An injection hole 28 is arranged between the bottom surface of the upper two counterbores 221 and the bottom surface of the first cavity 21, and an injection hole 28 is arranged between the bottom surface of the lower two counterbores 221 and the bottom surface of the second cavity 22.
[0045] Working principle:
[0046] The end plate 1 and the bottom plate 4 are respectively installed on the action mechanism and the machine body of the injection molding machine. The end plate 1 is driven to move backward by the action mechanism, and then the movable module 2 is driven to move toward the fixed module 3 by the seat plate 6 until the two are combined (prior art), so that the first protrusion 31 and the second protrusion 32 respectively extend into the first cavity 21 and the second cavity 22.
[0047] Then, the molten material enters the feeding hole 71 through the gate arranged in the end plate 1. The X-shaped heat preservation block 7 generates heat by installing a heater on the X-shaped heat preservation block 7, so that the molten material entering the feeding hole 71 maintains a certain temperature, and then enters the four discharge holes 73 through the four shunt holes 72 respectively, and then enters the four counterbores 221 through the four extrusion holes 62 respectively, and finally enters the area formed by the first protrusion 31 and the second protrusion 32 and the first cavity 21 and the second cavity 22 through the four injection holes 28. After cooling, the file box 8 is formed (prior art).
[0048] Then, the cooling liquid is injected from one end of each through hole 311 and flows out from the other end of each through hole 311. In this process, the cooling liquid constantly fills the inside of each cooling hole 312, and then quickly takes away the heat of the file box 8 through the heat conduction effect of the fixed module 3, thereby accelerating the cooling of the file box 8.
[0049] Then, the end plate 1 is driven to move forward by the action mechanism, and then the movable module 2 is driven to move forward and away from the fixed module 3 by the seat plate 6, and then the formed file box 8 is taken out (prior art).
[0050] The first protrusion 31 and the first mold cavity 21 cooperate to form a bottom cover 81 on the file box 8; the second protrusion 32 and the second mold cavity 22 cooperate to form a top cover 82 on the file box 8; the first core block 57 and the first notch 212 cooperate to form a first buckle groove 83 on the edge of the bottom cover 81; the second core block 55 and the second notch 27 cooperate to form a second buckle groove 84 on the edge of the bottom cover 81; the third core block 58 and the third notch 211 cooperate to form a third buckle groove 85 on the edge of the top cover 82; the fourth core block 54 and the fourth notch 25 cooperate to form a fourth buckle groove 86 on the edge of the top cover 82; the plurality of rib packages 313 and the plurality of rib grooves 29 cooperate to form a plurality of convex rib strips 87 on the bottom cover 81; the step ring 314 forms a step cavity 88 on the inner wall of the opening of the top cover 82; and the separation strip 23 forms a bending piece 89 between the bottom cover 81 and the top cover 82.
[0051] The utility model can effectively keep the molten material through the heat preservation module, and then can prevent the molten material temperature from falling to ensure that the molten material has good fluidity, and then can quickly and uniformly fill the forming mold cavity to avoid the phenomenon that the file box is not uniform, thereby effectively reducing the defective rate; in addition, the cooling speed is also accelerated to shorten the time interval of the file box ejection, thereby improving the production efficiency.
[0052] Finally, it should be noted that: the above examples are only used to illustrate the technical solutions of the utility model, and not to limit them; although the utility model has been described in detail with reference to the foregoing examples, those skilled in the art should understand that they can still modify the technical solutions recorded in the foregoing examples, or make equivalent replacement for part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the utility model embodiments.
Claims
1. An injection mold for a file box, comprising a movable mold block and a fixed mold block arranged in front of and behind each other, an end plate fixed to the front side of the movable mold block, and a bottom plate fixed to the rear side of the fixed mold block, characterized in that: a sandwich plate is further arranged between the movable mold block and the fixed mold block, a first protrusion and a second protrusion are formed on the outer wall of the front side of the fixed mold block, a rectangular cavity is formed in the sandwich plate, the first protrusion and the second protrusion are embedded in the rectangular cavity, and the end faces of the first protrusion and the second protrusion extend to the front of the sandwich plate; a first mold cavity and a second mold cavity are formed on the outer wall of the rear side of the movable mold block, the first mold cavity and the second mold cavity are arranged in the upper and lower sides, and the first mold cavity and the second mold cavity are matched with the first protrusion and the second protrusion, respectively, and a partition strip is formed between the inner walls of the first mold cavity and the second mold cavity; a connecting block is further formed between the outer walls of the first protrusion and the second protrusion, a gap is formed between the outer walls of the left and right sides of the connecting block and the outer walls of the first protrusion and the second protrusion, and a connecting groove matched with the partition strip is formed between the outer walls of the front side of the connecting block and the outer walls of the first protrusion and the second protrusion; a positioning block is formed on the inner walls of the left and right sides of the rectangular cavity, and the two positioning blocks are embedded in the two gaps. A plurality of cooling hole combinations are arranged on the outer wall of the rear side of the fixed mold block, the cooling hole combinations are arranged in sequence from top to bottom, a plurality of through holes are further arranged on the outer walls of the left and right sides of the fixed mold block, the through holes are arranged in sequence from top to bottom, each cooling hole combination comprises a plurality of cooling holes arranged in sequence from left to right, each through hole penetrates the inside of each cooling hole in the corresponding cooling hole combination, and the bottom of each cooling hole extends into the inside of the first protrusion or the second protrusion. A heat preservation module is further arranged between the end plate and the movable mold block, the heat preservation module comprises a seat plate fixed between the end plate and the movable mold block, and an X-shaped heat preservation block fixed between the end plate and the seat plate, a first mold cavity is formed on the outer wall of the front side of the seat plate, a second mold cavity matched with the first mold cavity is formed on the rear side of the end plate, and the front and rear outer walls of the X-shaped heat preservation block are fixed to the bottom surfaces of the second mold cavity and the first mold cavity, respectively. A feeding hole is formed in the center of the X-shaped heat preservation block, a shunt hole is formed between the outer wall of each corner of the X-shaped heat preservation block and the inner wall of the feeding hole, four discharge holes are further formed between the front and rear outer walls of the X-shaped heat preservation block, the four discharge holes are intersected and communicated with the four shunt holes, respectively, and four extrusion holes are formed on the bottom surface of the first mold cavity and communicated with the four discharge holes, respectively. Four counterbores are formed on the outer wall of the front side of the movable mold block, the bottom surfaces of the upper two counterbores and the bottom surfaces of the lower two counterbores are communicated with the bottom surface of the first mold cavity and the bottom surface of the second mold cavity, respectively, and an injection hole is formed between the bottom surfaces of the upper two counterbores and the bottom surface of the first mold cavity and between the bottom surfaces of the lower two counterbores and the bottom surface of the second mold cavity.
2. A file folder injection mold according to claim 1 wherein, 3. The file folder injection mold of claim 1 wherein, 4. A file folder injection mold according to claim 3 wherein, 5. A file box injection mold according to claim 4, wherein 6. The file folder injection mold of claim 1 wherein, The end face of the first protrusion is further formed with a plurality of muscle packages arranged vertically and distributed from left to right in sequence, and the bottom face of the first mold cavity is correspondingly formed with the same number of muscle grooves arranged vertically and distributed from left to right in sequence, and the bottom face of the second mold cavity is provided with a sink cavity.
7. The file folder injection mold of claim 1 wherein, The end face of the second protrusion is formed with a step ring located in front of the connecting block, and the upper part of the step ring is provided with a plurality of opening grooves distributed from left to right in sequence, and the end face of the partition strip is correspondingly formed with the same number of notch groove combinations arranged from left to right in sequence, each notch groove combination is matched with a corresponding opening groove, and the notch groove combination includes two notch grooves arranged on the upper and lower two side edges of the end face of the partition strip and symmetrically distributed.
8. The file folder injection mold of claim 1 wherein, The upper side of the first protrusion is provided with a first recess and a second recess arranged respectively on the left and right sides, and the upper inner wall of the rectangular cavity is correspondingly formed with a first clamping block and a second clamping block arranged respectively on the left and right sides towards the inside of the rectangular cavity, the first clamping block and the second clamping block are respectively embedded in the first recess and the second recess, the lower side of the second protrusion is provided with a third recess and a fourth recess arranged respectively on the left and right sides, and the lower inner wall of the rectangular cavity is correspondingly formed with a third clamping block and a fourth clamping block arranged respectively on the left and right sides towards the inside of the rectangular cavity, the third clamping block and the fourth clamping block are respectively embedded in the third recess and the fourth recess.
9. A file box injection mold according to claim 8, wherein The front side of the first clamping block and the second clamping block is further formed with a first core block and a second core block respectively between the front side of the interlayer plate, and the upper inner wall of the first mold cavity is correspondingly provided with a first notch and a second notch arranged respectively on the left and right sides, and the inner wall of the first notch and the second notch is further formed with a first step block and a second step block respectively between the bottom face of the first mold cavity, and the end face of the first step block and the second step block is matched with the end face of the first core block and the second core block respectively.
10. The file folder injection mold of claim 8 wherein, The front side of the third clamping block and the fourth clamping block is further formed with a third core block and a fourth core block respectively between the front side of the interlayer plate, and the lower inner wall of the first mold cavity is correspondingly provided with a third notch and a fourth notch arranged respectively on the left and right sides, and the inner wall of the third notch and the fourth notch is further formed with a third step block and a fourth step block respectively between the bottom face of the first mold cavity, and the end face of the third step block and the fourth step block is matched with the end face of the third core block and the fourth core block respectively.