CN210940220U

CN210940220U - Thin-wall single-cavity plastic part forming die

Info

Publication number: CN210940220U
Application number: CN201921002422.7U
Authority: CN
Inventors: 郭秋盛; 郭秋波
Original assignee: Jinhua Lisheng Plastic Mould Co ltd
Current assignee: Jinhua Lisheng Plastic Mould Co ltd
Priority date: 2019-06-28
Filing date: 2019-06-28
Publication date: 2020-07-07
Anticipated expiration: 2029-06-28

Abstract

The utility model provides a thin-wall single-cavity plastic part forming die, which comprises a fixed die, a movable die, a guide mechanism and a pouring system, wherein a film cavity is formed in the middle of the fixed die, a die core is formed in the middle of the movable die, and the die core is of an integrated structure; a straight side blowing hole is formed in the mold core, transversely penetrates through the whole mold core and is communicated with the corresponding airflow channel; the side blowing hole is internally embedded with an insert, the annular side wall of the insert is matched with the inner wall of the side blowing hole, an air passing gap is formed between the insert and the side blowing hole, the outer edges of the first end surface and the second end surface of the insert are respectively matched with the two ports of the side blowing hole to form two annular air blowing ports, the two annular air blowing ports are distributed on the side forming surface of the mold core, and the first end surface and the second end surface are matched with the side forming surface of the mold core to form an auxiliary forming surface. The utility model discloses when guaranteeing drawing of patterns effect and product quality, the mould processing degree of difficulty and manufacturing cost have been reduced.

Description

Thin-wall single-cavity plastic part forming die

Technical Field

The utility model belongs to the technical field of injection mold, in particular to thin wall single chamber type plastic part forming die.

Background

The injection mold is used for endowing a plastic product with a complete structure and an accurate size, and a thin-wall single-cavity type plastic part has a deep thin cavity and needs higher injection pressure and forming accuracy compared with a common plastic part, so that the requirements on the strength and the accuracy of the forming mold are higher, and the quality of the product is ensured; after the thin-wall single-cavity plastic part is formed, the plastic part and the mold core are in a vacuum state, the plastic part is easy to coat on the mold core, demolding is difficult, and the existing demolding mechanism is easy to damage the thin-wall product, so that the top is white or broken, and the product quality is influenced; the reasonability of the flow channel design and the cooling effect of the cooling water channel have great influence on the quality of the plastic part; compared with other plastic part forming molds, the thin-wall single-cavity plastic part forming mold is higher in processing difficulty and mold opening cost, shorter in service life and high in plastic part quality control difficulty.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a thin wall single chamber type mould to the current thin wall single chamber type mould manufacturing difficulty, life is short, the unable guaranteed problem of product quality provides a thin wall single chamber type mould.

The purpose of the utility model can be realized by the following technical proposal:

a thin-wall single-cavity plastic part forming die comprises a fixed die, a movable die, a guide mechanism and a pouring system, and is characterized in that a film cavity is formed in the middle of the fixed die, a die core is formed in the middle of the movable die, the die core is of an integrated structure, and the die core and the die cavity are matched to form a die cavity for forming a thin-wall single-cavity plastic part; a straight side blowing hole is formed in the mold core, transversely penetrates through the whole mold core and is communicated with a corresponding airflow channel, and the airflow channel is formed in the mold core; the die core of the integrated structure has high structural strength and stability, can prolong the service life of the die, has smooth surface of the die core, has high matching precision with the die cavity, and can effectively improve the quality of a plastic part; the thin-wall single-cavity type plastic part is provided with only one cavity, so that the structural integrity of the mold core is high, enough space is provided for the side blowing holes transversely penetrating through the whole mold core, two annular blowing ports can be formed by matching one side blowing hole with the insert, and the mold processing difficulty and the manufacturing cost are reduced while the demolding effect is ensured.

Preferably, the top of the mold core is provided with at least one air top hole, an air injection valve is installed in the air top hole, and the air top hole is communicated with the corresponding air flow channel. The mould core is provided with the gas top hole and the side blowing hole, compressed gas can blow towards the top wall and the side wall of the thin-wall single-cavity type plastic part, so that a uniform air layer is formed between the thin-wall single-cavity type plastic part and the mould core, the demoulding of the plastic part is convenient, the air pressure of the compressed gas can be adjusted according to the shape and the wall thickness of the thin-wall single-cavity type plastic part, and the product quality is ensured while the demoulding effect is ensured.

Preferably, a plurality of vertical cooling water channels are formed in the mold core at intervals, the axial direction of each vertical cooling water channel is consistent with the axial direction of the corresponding air flow channel and is arranged along the height direction of the mold core, a horizontal cooling water channel is arranged on the lower end face of the movable mold, and the vertical cooling water channels extend downwards and are communicated with the horizontal cooling water channels. The vertical cooling water channel is consistent with the axial direction of the airflow channel, the cooling stroke of cooling water can be increased, the vertical cooling water channel can avoid the airflow channel, the mold core is enabled to be internally provided with enough opening space to ensure the opening quantity of the cooling water channel, the cooling effect of the mold core is guaranteed, the quality of injection molding products is improved, the horizontal cooling water channel formed by the end face of the movable mold can further improve the cooling effect, and the plurality of vertical cooling water channels can be communicated to form a consistent water channel, so that the cooling efficiency is improved.

Preferably, safe intervals are set between the vertical cooling water channels and the airflow channel, and the safe intervals are larger than 6 mm. Because the cooling water channel needs to be cleaned by strong acid regularly, the safety interval of more than 6mm can effectively avoid the perforation of the cooling water channel and ensure the structural strength of the mold core.

Preferably, an inward concave guide cone groove is formed in the movable mold, the mold core is recessed in the guide cone groove, an outward convex guide cone table is formed on the fixed mold, the mold cavity is recessed in the guide cone table, and an inner conical surface of the guide cone groove is matched with an outer conical surface of the guide cone table to guide mold closing and mold opening of the movable mold and the fixed mold. The guide cone groove and the guide cone table are matched with other guide mechanisms, so that the matching accuracy of the die cavity and the die core can be further improved, and the product quality is guaranteed.

Preferably, the outer conical surface of the guide frustum is uniformly provided with a plurality of mounting grooves along the circumferential direction, the mounting grooves are internally provided with wear-resistant blocks, the wear-resistant blocks are obliquely mounted, and the inclination angle of the wear-resistant blocks is consistent with the draft angle of the outer conical surface. The wear-resisting piece set up can reduce the wearing and tearing of movable mould cover half fitting surface, extension mould life.

Preferably, the wear-resisting block is matched with the mounting groove in shape and is mounted in the mounting groove through a bolt, the outer surface of the wear-resisting block protrudes out of the outer conical surface, and an adjusting gasket can be arranged between the wear-resisting block and the groove bottom of the mounting groove in a cushioning mode so as to adjust the matching precision of the movable die and the fixed die. After the fixed die and the movable die are abraded, the matching degree of the fixed die and the movable die can be adjusted by filling the gasket, and the molten material is prevented from overflowing to generate flash.

Preferably, the movable die is fixed on the movable die base plate, a parallel cushion block is installed on the bottom surface of the movable die base plate, and the strength of the parallel cushion block is higher than that of the movable die base plate. Because thin wall single chamber type is moulded the piece and belongs to thin wall injection molding, for guaranteeing the product quality, need very big injection pressure and clamping force, the movable mould bedplate can the indent under injection pressure and clamping force effect, influences the cooperation of movable mould cover half, easily produces the overlap, can carry out effective compensation to the movable mould bedplate through setting up parallel cushion, improves its intensity to the accessible pad dress adjusts the gasket, adjusts the cooperation precision of movable mould cover half, guarantees the product quality.

Preferably, the movable mold and the fixed mold are provided with two groups and are matched to form two cavities, the pouring system comprises a main runner and two sub-runners, each cavity is communicated with the two sub-runners, and the sub-runners are arranged in pairwise symmetry by taking the main runner as the center. Two sets of movable dies and fixed dies can be arranged to form two plastic parts at one time, so that the energy is saved and the efficiency is high; each cavity is communicated with the two sub-runners, so that the injection pressure can be reduced, and the injection speed and the product percent of pass are improved; the two-by-two symmetrical arrangement of the branch channels can ensure that the glue feeding of the cavity is even, thereby improving the quality of the plastic part.

Preferably, the lower side of the side blowing hole is provided with a mounting hole for mounting a fastener, the axial direction of the mounting hole is perpendicular to the length direction of the side blowing hole, a mounting hole is coaxially arranged below the mounting hole, the upper end of the mounting hole is communicated with the mounting hole, and the lower end of the mounting hole extends downwards and penetrates through the lower end face of the movable die. The fastener can further improve the installation steadiness of inserting, avoids its pine to take off the displacement under compressed gas's effect, and through the setting of pilot hole, can accomplish the assembly of fastener under the prerequisite of not destroying integrative structure of mold core.

Preferably, the insert has a rectangular cross section, and the annular side wall of the insert is surrounded by four planar side walls. The lateral wall of the planar structure can provide a reliable stress position for the fastening bolt, the fastening effect of the fastening bolt is guaranteed, meanwhile, interaction forces in different directions can be provided at the matching position of the insert and the side blowing hole, and the installation stability of the insert is improved.

Preferably, the four end corners of the insert are all arc chamfers, and the four end corners of the side blowing holes are chamfers matched with the end corners of the insert. Insert and side blow the end angle in hole and set up to the arc chamfer and for the right angle can effectively avoid inserting when the thermal expansion, the inner wall in hole is blown in the side in direct action of right angle end angle, causes stress concentration, causes the injury to the mould, leads to the mould fracture, also avoids inserting impaired simultaneously to the intensity and the life of inserting and mould have effectively been improved.

Compared with the prior art, the utility model has the advantages that two annular blowing ports can be formed by matching one side blowing hole with the insert, thus reducing the processing difficulty and the manufacturing cost of the die while ensuring the demoulding effect; the side blowing holes formed in the mold core can form a uniform air layer between the plastic part and the mold core, so that the plastic part can be conveniently demolded, the air pressure of compressed air can be adjusted according to the shape and the wall thickness of the thin-wall single-cavity plastic part, and the demolding effect and the product quality are ensured; the mold core is of an integrated structure, the structural stability is high, and the service life of the mold can be prolonged; the arrangement of the wear-resistant block and the parallel cushion block can effectively prolong the service life of the die, and can adjust the matching precision of the fixed die and the movable die, thereby ensuring the quality of the thin-wall single-cavity molded part; airflow channel and cooling water course distribute rationally effectively, can guarantee drawing of patterns effect and cooling effect when guaranteeing mold core structural strength.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of the internal structure of the present invention;

FIG. 3 is a schematic structural view of the middle moving mold of the present invention;

FIG. 4 is a schematic view of the internal structure of the middle moving mold of the present invention;

FIG. 5 is a schematic view of the structure of the insert block of the present invention;

FIG. 6 is a schematic view of the bottom structure of the middle moving mold of the present invention;

FIG. 7 is a schematic structural view of the middle fixed mold of the present invention;

FIG. 8 is a schematic view of a pouring system of the present invention;

FIG. 9 is a schematic structural view of the middle movable mold base plate of the present invention;

in the figure, a movable mold 11; a fixed die 12; a hot runner plate 13; a movable die base plate 14; a mold core 110; a gas top hole 111; an air flow passage 112; a vertical cooling water channel 113; horizontal cooling channels 114; a guide cone groove 115; a fitting hole 116; a main flow passage 21; a bypass passage 22; an insert 30; a first end face 31; an annular side wall 32; an arc chamfer 33; a fastening bolt 40; a mold cavity 120; a guide frustum 121; a wear-resistant block 122; parallel to the spacer 50.

Detailed Description

The following are specific embodiments of the present invention, and the technical solutions of the present invention will be further described with reference to the accompanying drawings, but the present invention is not limited to these embodiments.

Referring to fig. 1-9, the embodiment discloses a thin-wall single-cavity plastic part forming mold, which includes a movable mold 11, a fixed mold 12, a guiding mechanism and a pouring system, wherein a mold core 110 is formed in the middle of the movable mold 11, a mold cavity 120 is formed in the middle of the fixed mold 12, the mold core 110 is of an integrated structure, the mold core 110 and the mold cavity 120 are matched to form a mold cavity for forming a thin-wall single-cavity plastic part, the mold core 110 of the integrated structure has high structural strength and stability, can prolong the service life of the mold, has a smooth surface, has high matching accuracy with the mold cavity 120, can improve the product quality of the thin-wall single-cavity plastic part, and avoids generating excessive injection molding marks; in the embodiment, the thin-wall single-cavity plastic part is a lunch box, the movable mold 11 and the fixed mold 12 are provided with two groups and are matched to form two cavities, and two groups of movable mold 11 and fixed mold 12 are arranged to mold two plastic parts at one time, so that the lunch box is more energy-saving and efficient; the guide mechanism comprises a guide sleeve arranged on the fixed die 12 and a guide post arranged on the movable die 11, and the guide sleeve is matched with the guide post to guide the opening and closing of the fixed die 12 and the movable die 11 so as to ensure the matching precision of the die cavity 120 and the die core 110; the gating system sets up in hot runner plate 13, including sprue 21 and subchannel 22, sprue 21 and injection molding machine intercommunication send the melt to each subchannel 22, and every die cavity all communicates with two subchannels 22, subchannel 22 uses sprue 21 as the center, and two bisymmetry settings, every die cavity all communicate with two subchannels 22, can reduce the pressure of moulding plastics, improve speed of moulding plastics and product percent of pass, and two bisymmetry settings of subchannel 22 can guarantee that the die cavity advances to glue evenly to improve and mould a quality.

A straight side blowing hole is formed in the mold core 110, the side blowing hole transversely penetrates through the entire mold core 110 and is communicated with a corresponding airflow channel 112, and the airflow channel 112 is formed in the mold core 110; the insert 30 is embedded in the side blowing holes, the insert 30 is provided with a first end surface 31, a second end surface and an annular side wall 32, the annular side wall 32 is adapted to the inner wall of the side blowing holes, an air passing gap is formed between the insert 30 and the side blowing holes, the outer edges of the first end surface 31 and the second end surface which are oppositely arranged are respectively matched with two ports of the side blowing holes to form two annular air blowing ports, the two annular air blowing ports are uniformly distributed on the side forming surface of the mold core 110, the first end surface 31 and the second end surface are matched with the side forming surface of the mold core 110 to form an auxiliary forming surface, the thin-wall single-cavity type plastic part is provided with only one cavity, so that the structural integrity of the mold core 110 is high, enough space is provided for the side blowing holes which transversely penetrate through the whole mold core 110, the two annular air blowing ports can be formed by matching of one side blowing hole and the insert 30, the demolding effect is, the processing difficulty and the manufacturing cost of the die are reduced; for the plastic part with a top wall, an air top hole can be arranged at the top of the mold core to further improve the demolding effect, in the embodiment, the number of the air top holes is two, the two air top holes 111 are distributed in diagonal, the air jet valve is arranged in the air top holes 111, the type of the air jet valve in the embodiment is C-AJVSS6-12, the outer diameter of the air jet valve is 6mm, the air jet valve is made of stainless steel and comprises a body, a piston rod, a spring and an elastic split pin, each air top hole 111 is communicated with a corresponding air flow channel 112, the air blowing effectiveness can be improved by arranging the air top holes 111 in diagonal, the effective action area of the compressed air blown out from the air top holes 111 is larger, the demolding effect is improved, the three air flow channels 112 respectively communicated with the air top holes 111 and the side blowing holes are arranged in the mold core 110 at intervals and are communicated with the main air flow channel, the main air flow channel is communicated with an external compressed air source, and the side blowing holes are matched with, the lunch box demoulding device has the advantages that the lunch box demoulding is convenient, the defective rate caused by demoulding is reduced, enough space can be provided for the cooling water channel, and the mould manufacturing and processing are convenient.

In order to improve the installation stability of the insert 30 and avoid the loosening and displacement of the insert under the action of compressed gas, the lower side of the side blowing hole is provided with an installation hole for installing a fastener, the axial direction of the installation hole is perpendicular to the length direction of the side blowing hole, an assembly hole 116 is coaxially arranged below the installation hole, the upper end of the assembly hole 116 is communicated with the installation hole, the lower end of the assembly hole 116 extends downwards and penetrates through the lower end face of the movable die 11, and the assembly of the fastener can be completed on the premise of not damaging the integral structure of the die core 110 through the arrangement of the assembly hole 116; the aperture of the assembling hole 116 is larger than that of the mounting hole, a step edge is formed at the connecting position of the assembling hole, an internal thread is formed on the hole wall of the mounting hole, the fastening piece is a hexagon socket head cap fastening bolt 40, the fastening bolt 40 is mounted in the mounting hole, the upper end surface of the fastening bolt abuts against the side wall of the insert 30, and the hexagon socket head cap fastening bolt is adopted as the fastening piece, so that the assembling is convenient; in the embodiment, the cross section of the insert 30 is rectangular, the annular side wall 32 is formed by enclosing four side walls with a planar structure, the upper end surface of the fastening bolt 40 acts on the lower side wall, the side walls with the planar structure can provide reliable stress positions for the fastening bolt 40, the fastening effect of the fastening bolt 40 is ensured, and the insert 30 with the structure is convenient to process; for avoiding stress concentration, four end angles of the insert 30 are arc chamfers 33, four end angles of the side blow hole are chamfers matched with the end angles of the insert 30, when the insert 30 can be effectively prevented from being expanded by heat relative to a right angle, the right angle end angles directly act on the inner wall of the side blow hole, stress concentration is caused, damage is caused to a mold, mold cracking is caused, meanwhile, the insert 30 is also prevented from being damaged, so that the strength and the service life of the insert 30 and the mold are effectively improved, the insert 30 and the mold core 110 are made of the same material in the embodiment, so that the uniform expansion coefficient and the contraction coefficient of the insert 30 and the mold core 110 are ensured, and the matching degree of the insert 30 and the.

A plurality of vertical cooling water channels 113 are formed at intervals in the mold core 110, the axial direction of the vertical cooling water channels 113 is consistent with the axial direction of the air flow channel 112 and is arranged along the height direction of the mold core 110, the height direction of the mold core 110 in the embodiment refers to the moving direction of the mold core 110 when the mold is closed, a horizontal cooling water channel 114 is arranged on the lower end surface of the movable mold 11, the vertical cooling water channels 113 extend downwards and are communicated with the horizontal cooling water channels 114, a water-isolating sheet is arranged in each vertical cooling water channel 113 along the axial direction of the vertical cooling water channel, the water-isolating sheet divides the cooling water channel into a water inlet channel and a water outlet channel, the vertical cooling water channels 113 are consistent with the axial direction of the air flow channel 112, the cooling stroke of cooling water can be increased, and the vertical cooling water channels 113 can avoid the air flow channel 112, so that enough space is arranged in the, the quality of the injection molding product is improved, the horizontal cooling water channel 114 formed on the lower end face of the movable mold 11 can further improve the cooling effect, and a plurality of vertical cooling water channels 113 can be communicated to form a through water channel, so that the cooling efficiency is improved, and the connection with an external water supply device is facilitated; because the injection pressure of the thin-wall single-cavity type plastic part is large, and the upper end surface of the mold core 110 is a main pressure-bearing part, the structural strength of the mold core 110 is considered while the depth of the cooling water channel is increased to improve the cooling effect, so that the reserved distance between the upper end surface of the vertical cooling water channel 113 and the upper end surface of the mold core 110 is larger than 9mm, and the reserved distance is 10mm in the embodiment; because the vertical cooling water channels 113 need to be cleaned by strong acid regularly, in order to avoid perforation, safe intervals are set between the vertical cooling water channels 113 and the airflow channel 112, the safe intervals are larger than 6mm, and the arrangement of the reserved intervals and the safe intervals ensures the structural strength of the mold core 110 while ensuring the cooling effect of the cooling water channels, thereby effectively solving the problems of water leakage of the cooling water channels and cracking of the movable mold 11 and prolonging the service life of the mold; the mold core 110 is of an integrated structure, after the mold core 110 is molded, a side blowing hole, a gas cap hole 111, an airflow channel 112, a vertical cooling water channel 113, a horizontal cooling water channel 114, a mounting hole and an assembling hole 116 are formed in the mold core 110 according to the size, then the insert 30 is embedded in the side blowing hole, the fastening bolt 40 is installed in the mounting hole from the lower end of the assembling hole 116 to fix the insert 30, and then the gas injection valve is embedded in the gas cap hole 111, so that the machining and assembling of the mold core 110 are completed, and the manufacturing and machining process is simple.

An inward concave guide cone groove 115 is formed on the movable mold 11, the mold core 110 is sunken in the guide cone groove 115, an outward convex guide cone table 121 is formed on the fixed mold 12, the mold cavity 120 is sunken in the guide cone table 121, and the inner conical surface of the guide cone groove 115 is matched with the outer conical surface of the guide cone table 121 to position and guide the mold closing and mold opening of the movable mold 11 and the fixed mold 12, so that the matching accuracy of the mold cavity 120 and the mold core 110 is further improved, pressure maintaining is facilitated during molding of a plastic part, and the product quality is guaranteed; an annular exhaust groove is formed in the parting surface of the movable mold 11 and used for exhausting during injection molding; four mounting grooves are uniformly formed in the outer conical surface of the guide cone table 121 along the circumferential direction, the wear-resistant blocks 122 are mounted in the mounting grooves, the wear-resistant blocks 122 are obliquely mounted, the inclination angle of the wear-resistant blocks is consistent with the draft angle of the outer conical surface, the outer surfaces of the wear-resistant blocks 122 protrude out of the outer conical surface, the matching surface of the moving die 11 and the fixed die 12 is extremely easy to wear due to the fact that the moving die 11 and the fixed die 12 need to be opened and closed in a reciprocating mode, matching accuracy of the die is affected, the wear of the matching surface; the shape of the wear-resistant block 122 is matched with the mounting groove and is mounted in the mounting groove through a bolt, an adjusting gasket can be filled between the wear-resistant block 122 and the groove bottom of the mounting groove to adjust the matching precision of the movable mold 11 and the fixed mold 12, and after the movable mold 11 of the fixed mold 12 is worn, the matching degree of the fixed mold 12 of the movable mold 11 can be adjusted through the filling gasket to prevent the molten material from overflowing to generate flash; the movable mould 11 is fixed on the movable mould bedplate 14, parallel cushion block 50 is installed through the bolt to the bottom surface of the movable mould bedplate 14, parallel cushion block 50 is located the mounting groove of the central authorities of the bottom surface of the movable mould bedplate 14, the intensity of parallel cushion block 50 is higher than the movable mould bedplate 14, because in the thin-wall single-cavity molding process, in order to guarantee the product quality, need very big injection pressure and mould locking force, the movable mould bedplate 14 can indent under the repeated action of injection pressure and mould locking force, influence the cooperation of the fixed mould 12 of the movable mould 11, lead to the plastic part to produce the overlap, can compensate the movable mould bedplate 14 by setting up the parallel cushion block 50, improve the intensity thereof, and the accessible pad adjusts the gasket, adjust the cooperation precision of the fixed mould 12 of the movable mould 11, guarantee the.

The utility model discloses a thin-wall single-cavity plastic part forming die which has compact structure and convenient processing, two annular blowing ports can be formed by matching a side blowing hole with an insert 30, and the processing difficulty and the manufacturing cost of the die are reduced while the demoulding effect is ensured; the mold core 110 is provided with an air top hole 111 and a side blowing hole, so that a uniform air layer can be formed between the plastic part and the mold core 110, and the demoulding of the plastic part is facilitated; the mold core 110 adopts an integrated structure, the structural strength and stability are high, the service life is long, and the matching precision of the mold core 110 and the mold cavity 120 is high under the action of a multi-guide positioning mechanism, so that the product quality of a plastic part is ensured; the arrangement of the wear-resisting block 122 and the parallel cushion block 50 can effectively prolong the service life of the die, and can adjust the matching precision of the fixed die 12 of the movable die 11, so that the quality of the thin-wall single-cavity molding part is further ensured; airflow channel 112 and cooling water course distribute rationally effectively, can guarantee drawing of patterns effect and cooling effect when guaranteeing mold core 110 structural strength.

It is to be understood that in the claims, the specification of the present invention, all "including … …" are to be interpreted in an open-ended manner, i.e., in a manner equivalent to "including at least … …", and not in a closed manner, i.e., in a manner not to be interpreted as "including only … …". The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated.

The above description is only the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and those skilled in the art should be able to make changes, modifications, additions or substitutions within the scope of the present invention.

Claims

1. A thin-wall single-cavity plastic part forming die comprises a fixed die (12), a movable die (11), a guide mechanism and a pouring system, and is characterized in that a film cavity is formed in the middle of the fixed die (12), a die core (110) is formed in the middle of the movable die (11), the die core (110) is of an integrated structure, and the die core (110) and the die cavity (120) are matched to form a die cavity for forming a thin-wall single-cavity plastic part; a straight side blowing hole is formed in the mold core (110), the side blowing hole transversely penetrates through the whole mold core (110) and is communicated with a corresponding airflow channel (112), and the airflow channel (112) is formed in the mold core (110); inlay in the side blow hole and be equipped with insert (30), insert (30) have first terminal surface (31), second terminal surface and annular lateral wall (32), annular lateral wall (32) suit with the inner wall in side blow hole, and the installation clearance between insert (30) and the side blow hole forms air gap, sets up the outer fringe of first terminal surface (31) and second terminal surface relatively and forms two annular blowing ports with two port cooperations in side blow hole respectively, and two annular blowing ports are equallyd divide and are distributed in the lateral part shaping surface of mold core (110), first terminal surface (31) and second terminal surface all form supplementary shaping surface with the lateral part shaping surface phase-match of mold core (110).

2. The thin-wall single-cavity plastic part forming die as claimed in claim 1, wherein a plurality of vertical cooling water channels (113) are formed at intervals in the die core (110), the axial directions of the vertical cooling water channels (113) are consistent with the axial direction of the air flow channel (112) and are arranged along the height direction of the die core (110), horizontal cooling water channels (114) are arranged on the lower end face of the movable die (11), and the vertical cooling water channels (113) extend downwards and are communicated with the horizontal cooling water channels (114).

3. The thin-walled single-cavity plastic part molding die according to claim 2, wherein safety spaces are set between the vertical cooling water channels (113) and the air flow channel (112), and the safety spaces are larger than 6 mm.

4. The thin-wall single-cavity plastic part forming die as claimed in any one of claims 1 to 3, wherein a concave guide cone groove (115) is formed on the movable die (11), the die core (110) is recessed in the guide cone groove (115), a convex guide cone (121) is formed on the fixed die (12), the die cavity (120) is recessed in the guide cone (121), an inner conical surface of the guide cone groove (115) is matched with an outer conical surface of the guide cone (121) to guide the die closing and die opening of the movable die (11) and the fixed die (12), a plurality of mounting grooves are uniformly formed in the outer conical surface of the guide cone (121) along the circumferential direction, wear-resistant blocks (122) are mounted in the mounting grooves, and the wear-resistant blocks (122) are mounted in an inclined conical surface with the inclination angle consistent with the draft angle of the outer die.

5. The thin-wall single-cavity type plastic part forming die as claimed in claim 4, wherein the wear-resisting block (122) is matched with the mounting groove in shape and is mounted in the mounting groove through a bolt, the outer surface of the wear-resisting block (122) protrudes out of the outer conical surface, and an adjusting gasket can be arranged between the wear-resisting block (122) and the bottom of the mounting groove in a cushioning mode so as to adjust the matching precision of the movable die (11) and the fixed die (12).

6. The thin-wall single-cavity plastic part forming die as claimed in claim 1, wherein the movable die (11) is fixed on the movable die base plate (14), the bottom surface of the movable die base plate (14) is provided with the parallel cushion blocks (50), and the strength of the parallel cushion blocks (50) is higher than that of the movable die base plate (14).

7. The thin-wall single-cavity plastic part forming mold as claimed in claim 1, wherein the moving mold (11) and the fixed mold (12) are provided with two sets and cooperate to form two cavities, the pouring system comprises a main runner (21) and branch runners (22), each cavity is communicated with two branch runners (22), and the branch runners (22) are arranged symmetrically in pairs by taking the main runner (21) as a center.

8. The thin-wall single-cavity type plastic part forming die as claimed in claim 1, 2, 3, 6 or 7, wherein a mounting hole for mounting a fastener is formed in the lower side of the side blowing hole, the axial direction of the mounting hole is perpendicular to the length direction of the side blowing hole, a mounting hole (116) is coaxially formed below the mounting hole, the upper end of the mounting hole (116) is communicated with the mounting hole, and the lower end of the mounting hole (116) extends downwards and penetrates through the lower end face of the movable die (11).

9. The thin-walled single-cavity plastic part forming die of claim 8, wherein the insert (30) is rectangular in cross section and the annular side wall (32) is defined by four planar side walls.

10. The thin-wall single-cavity plastic part forming die as claimed in claim 9, wherein four end corners of the insert (30) are all arc-shaped chamfers (33), and four end corners of the side blow holes are chamfers matched with the end corners of the insert (30).