WO2020258678A1

WO2020258678A1 - Thin-wall single-cavity plastic forming mold

Info

Publication number: WO2020258678A1
Application number: PCT/CN2019/118765
Authority: WO
Inventors: 郭秋盛; 郭秋波
Original assignee: 郭秋盛
Priority date: 2019-06-28
Filing date: 2019-11-15
Publication date: 2020-12-30
Also published as: CN110341123A

Abstract

The present invention provides a thin-wall single-cavity forming mold for plastic parts, comprising a fixed mold, a movable mold, a guide mechanism and a pouring system, wherein a film cavity is formed in the middle of the fixed mold, a mold core is formed in the middle of the movable mold, and the mold core is of an integrated structure; a straight side blowing hole is formed inside the mold core, and the side blowing hole is transversely across the whole mold core and communicates with a corresponding airflow channel; an insert is embedded in the side blowing hole, the annular side wall of the insert matches the inner wall of the side blowing hole, a mounting gap between the insert and the side blowing hole forms an air gap, the outer edges of the first end face and the second end face of the insert are respectively matched with the two ports of the side blowing hole to form two annular blowing ports, the two annular blowing ports are distributed on the side forming surface of the mold core, and the first end face and the second end face are both matched with the side forming surface of the mold core to form an auxiliary forming surface. The present invention reduces the mold processing difficulty and the manufacturing cost while ensuring the demolding effect and the product quality.

Description

Thin-walled single-cavity plastic part forming mold

Technical field

The invention belongs to the technical field of injection molds, and particularly relates to a thin-walled single-cavity plastic part forming mold.

Background technique

Injection molds are used to give plastic products a complete structure and precise dimensions. Thin-walled single-cavity plastic parts have a thin wall and a deep cavity. Compared with ordinary plastic parts, they require greater injection pressure and molding accuracy. Therefore, the strength and accuracy of the molding mold Higher requirements are required to ensure the quality of the product; and after the thin-walled single-cavity plastic part is formed, the plastic part and the mold core are in a vacuum state, and the plastic part is easily covered on the mold core, which makes it difficult to demold. The mold mechanism is easy to cause damage to thin-walled products, leading to whitening or bursting, affecting product quality; the rationality of the runner design and the cooling effect of the cooling water channel have a great impact on the quality of plastic parts; in summary Compared with other plastic part forming molds, the cavity-shaped plastic part forming mold is more difficult to process and the cost of mold opening is higher, the service life is shorter and the quality of the plastic part is more difficult to control.

Summary of the invention

The purpose of the present invention is to provide a thin-walled single-cavity mold for the problems that the existing thin-walled single-cavity mold is difficult to manufacture and process, the service life is short, and the product quality cannot be guaranteed.

The purpose of the present invention can be achieved through the following technical solutions:

A thin-walled single-cavity plastic molding mold, including a fixed mold, a movable mold, a guide mechanism, and a pouring system, characterized in that a film cavity is formed in the middle of the fixed mold, and a mold core is formed in the middle of the movable mold. The mold core is One-piece structure, the mold core and the mold cavity cooperate to form a cavity for forming a thin-walled single-cavity plastic part; the mold core is provided with straight side blow holes, and the side blow holes penetrate the entire mold core transversely, and are connected with the corresponding air flow channel Connected, the air flow channel is formed inside the mold core; the side blow hole is embedded with an insert, the insert has a first end surface, a second end surface and an annular side wall, the annular side wall and the inner wall of the side blow hole Correspondingly, the installation gap between the insert and the side blow hole forms an air gap, and the outer edges of the first end face and the second end face opposite to each other cooperate with the two ports of the side blow hole to form two annular blowing ports. The two annular blowing ports are all distributed on the side molding surface of the mold core, and the first end surface and the second end surface are matched with the side molding surface of the mold core to form an auxiliary molding surface. The integral structure of the mold core structure strength and stability High performance, can prolong the service life of the mold, and the surface of the mold core is smooth, and the matching accuracy with the mold cavity is high, which can effectively improve the quality of the plastic part; the thin-walled single-cavity plastic part has only one cavity, so its core structure The overall degree is high, there is enough space to open the side blowing hole that penetrates the entire mold core horizontally, and two annular blowing ports can be formed through the cooperation of one side blowing hole and the insert, which reduces the mold while ensuring the demolding effect. Processing difficulty and manufacturing cost.

Preferably, at least one air cap hole is provided on the top of the mold core, an air jet valve is installed in the air cap hole, and the air cap hole communicates with a corresponding air flow channel. The mold core is provided with an air top hole and a side blow hole. The compressed gas can blow to the top wall and side wall of the thin-walled single-cavity plastic part to form uniform air between the thin-walled single-cavity plastic part and the mold core. Layers are convenient for demoulding of plastic parts, and the pressure of compressed gas can be adjusted according to the shape and wall thickness of thin-walled single-cavity plastic parts to ensure the demoulding effect while ensuring product quality.

Preferably, a plurality of vertical cooling water channels are formed at intervals in the mold core, and the axial direction of the vertical cooling water channels is consistent with the axial direction of the air flow channel, and they are all opened along the height direction of the mold core, and the lower end surface of the movable mold is provided with The horizontal cooling water channel extends downward and is connected to the horizontal cooling water channel. The axial direction of the vertical cooling water channel is consistent with the air flow channel, which can increase the cooling stroke of the cooling water, and the vertical cooling water channel can avoid the air flow channel, so that there is enough space inside the mold core to ensure the number of cooling water channels to be opened. The cooling effect improves the quality of injection molded products. The horizontal cooling water channel opened on the lower end of the movable mold can further improve the cooling effect, and can connect multiple vertical cooling water channels into a continuous water channel to improve cooling efficiency.

Preferably, a safe distance is set between the vertical cooling water passages and between the vertical cooling water passage and the air flow channel, and the safe distance is greater than 6 mm. Since the cooling water channel needs to be cleaned with strong acid regularly, a safety distance of 6mm or more can effectively avoid the cooling channel perforation and ensure the structural strength of the mold core.

Preferably, the movable mold is formed with a concave guide cone groove, the mold core is recessed in the guide cone groove, the fixed mold is formed with a convex guide cone, the mold cavity is recessed in the guide cone, and the guide cone The inner conical surface of the groove cooperates with the outer conical surface of the guide frustum to guide the clamping and opening of the movable mold and the fixed mold. The guide cone groove and the guide cone table cooperate with other guide mechanisms to further improve the matching accuracy of the mold cavity and the mold core, thereby ensuring product quality.

Preferably, the outer cone surface of the guide frustum is evenly provided with a plurality of installation grooves along the circumferential direction, the installation grooves are equipped with a wear block, the wear block is installed obliquely, and its inclination angle is the same as that of the outer cone surface. The draft angle is the same. The setting of the wear-resistant block can reduce the wear of the mating surface of the movable mold and the fixed mold and prolong the service life of the mold.

Preferably, the shape of the wear-resistant block is matched with the installation groove, and is installed in the installation groove by bolts, the outer surface of the wear-resistant block protrudes from the outer conical surface, and the wear-resistant block can be installed between the groove bottom and the installation groove. Adjusting shims are installed to adjust the matching accuracy of the movable mold and the fixed mold. After the fixed mold and the movable mold are worn out, the mating degree of the movable mold and the fixed mold can be adjusted by the gasket to prevent the molten material from overflowing and causing flash.

Preferably, the movable mold is fixed on the movable mold seat plate, and parallel pads are installed on the bottom surface of the movable mold seat plate, and the strength of the parallel pads is higher than that of the movable mold seat plate. Because thin-walled single-cavity plastic parts are thin-walled injection products, in order to ensure product quality, very large injection pressure and clamping force are required. The movable mold seat plate will be concave under the action of injection pressure and clamping force, which affects the dynamic The matching of the fixed mold and the mold is easy to produce flash. By setting the parallel pads, the movable mold seat plate can be effectively compensated to improve its strength. The adjustment pads can be installed to adjust the matching accuracy of the movable mold and the fixed mold to ensure the product quality.

Preferably, there are two sets of the movable mold and the fixed mold, and they cooperate to form two cavities. The gating system includes a main flow channel and a branching channel. Each cavity is connected to two branching channels. The main channel is the center, and it is arranged symmetrically. Two sets of movable molds and fixed molds can form two plastic parts at a time, which is more energy-saving and efficient; each cavity is connected with two runners, which can reduce injection pressure, improve injection speed and product qualification rate; two runners The two symmetrical settings can ensure uniform injection of glue in the cavity, thereby improving the quality of plastic parts.

Preferably, the lower side of the side blowing hole is provided with a mounting hole for installing fasteners, the axial direction of the mounting hole is perpendicular to the length direction of the side blowing hole, and the mounting hole is coaxially provided with a mounting hole below the mounting hole. The upper end of the hole communicates with the mounting hole, and the lower end of the mounting hole extends downward and penetrates the lower end surface of the movable mold. Fasteners can further improve the installation stability of the inserts, avoid their loosening and displacement under the action of compressed gas, and by setting the assembly holes, the assembly of the fasteners can be completed without damaging the integrated structure of the mold core.

Preferably, the cross section of the insert is rectangular, and its annular side wall is enclosed by four flat side walls. The side wall of the planar structure can provide a reliable force position for the fastening bolts, ensure the fastening effect of the fastening bolts, and provide interaction forces in different directions at the matching positions of the insert and the side blow hole to improve the installation of the insert Stability.

Preferably, the four end corners of the insert are all arc-shaped chamfers, and the four end corners of the side blow holes are also chamfers that match the end corners of the insert. The end angles of the insert and the side blow hole are set to an arc chamfer relative to the right angle, which can effectively avoid the thermal expansion of the insert. The right angle end angle directly acts on the inner wall of the side blow hole, causing stress concentration, causing damage to the mold, and causing the mold Cracking, while avoiding damage to the insert, thereby effectively improving the strength and service life of the insert and the mold.

Compared with the prior art, the present invention has the following beneficial effects. Two annular blowing ports can be formed through the cooperation of one side blowing hole and the insert, which reduces the difficulty of mold processing and manufacturing cost while ensuring the demolding effect. ; The side blow holes opened on the mold core can form a uniform air layer between the plastic part and the mold core, facilitate the demolding of the plastic part, and can adjust the compressed gas according to the shape and wall thickness of the thin-walled single-cavity plastic part Air pressure, while ensuring the demolding effect and product quality; the mold core is an integrated structure with high structural stability, which can prolong the service life of the mold; the setting of wear-resistant blocks and parallel cushion blocks can effectively extend the service life of the mold and can adjust the movable mold The matching accuracy of the fixed mold ensures the quality of the thin-walled single-cavity plastic parts; the distribution of air flow channels and cooling water channels is reasonable and effective, which can ensure the demolding effect and cooling effect while ensuring the strength of the mold core structure.

Description of the drawings

Figure 1 is a schematic diagram of the structure of the present invention;

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

Figure 3 is a schematic diagram of the structure of the movable mold in the present invention;

Figure 4 is a schematic diagram of the internal structure of the movable mold in the present invention;

Figure 5 is a schematic diagram of the structure of the insert in the present invention;

Figure 6 is a schematic diagram of the bottom structure of the movable mold in the present invention;

Figure 7 is a schematic diagram of the fixed mold structure of the present invention;

Figure 8 is a schematic diagram of the pouring system of the present invention;

Figure 9 is a schematic diagram of the structure of the movable mold seat plate in the present invention;

In the figure, the movable mold 11; the fixed mold 12; the hot runner plate 13; the movable mold seat plate 14; the core 110; the air top hole 111; the air flow channel 112; the vertical cooling water channel 113; the horizontal cooling water channel 114; the guide cone 115 Assembly hole 116; main flow channel 21; runner 22; insert 30; first end surface 31; annular side wall 32; curved chamfer 33; fastening bolt 40; mold cavity 120; guide frustum 121; wear-resistant block 122; Parallel spacer 50.

Detailed ways

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

1-9, this embodiment discloses a thin-walled single-cavity plastic molding mold, which includes a movable mold 11, a fixed mold 12, a guiding mechanism, and a pouring system. 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, and the mold core 110 is an integrated structure. The mold core 110 and the mold cavity 120 cooperate to form a cavity for forming a thin-walled single-cavity plastic part. The integrated structure of the mold core 110 structure High strength and stability, can prolong the service life of the mold, and the surface is smooth, and the matching accuracy with the cavity 120 is high, which can improve the product quality of thin-walled single-cavity plastic parts and avoid excessive injection marks; this implementation In the example, the thin-walled single-cavity plastic part is a lunch box. The movable mold 11 and the fixed mold 12 have two sets, and they cooperate to form two cavities. The two sets of the movable mold 11 and the fixed mold 12 can form two plastics at a time. The guide mechanism includes a guide sleeve set on the fixed mold 12 and a guide post set on the movable mold 11. The guide sleeve and the guide post cooperate to guide the opening and closing of the fixed mold 12 and the movable mold 11. In order to ensure the matching accuracy of the mold cavity 120 and the mold core 110; the pouring system is set in the hot runner plate 13, including the main runner 21 and the runner 22. The runner 21 communicates with the injection molding machine to send the melt to the runners 22, Each cavity is communicated with two runners 22. The runners 22 are arranged symmetrically with the runner 21 as the center. Each cavity is connected with the two runners 22, which can reduce the injection pressure and improve The injection speed and product qualification rate, and the symmetrical setting of the runner 22 in pairs can ensure uniform injection of glue in the cavity, thereby improving the quality of plastic parts.

The mold core 110 is provided with a straight side blow hole, which penetrates the entire mold core 110 transversely and communicates with the corresponding air flow channel 112, which is formed inside the mold core 110; the side blow hole is embedded with The insert 30 has 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 blow hole. The installation between the insert block 30 and the side blow hole The gap forms an air gap, and the outer edges of the first end face 31 and the second end face opposite to each other cooperate with the two ports of the side blowing holes to form two annular blowing ports, and the two annular blowing ports are both distributed on the core 110 The side molding surface, the first end surface 31 and the second end surface are matched with the side molding surface of the mold core 110 to form an auxiliary molding surface. The thin-walled single cavity plastic part has only one cavity, so the mold core 110 The structure is highly integrated, and there is enough space to open a side blowing hole that penetrates the entire mold core 110 transversely. Two annular blowing ports can be formed by the cooperation of one side blowing hole and the insert 30. While ensuring the demolding effect, Reduce the difficulty of mold processing and manufacturing cost; for plastic parts with a bottom wall, an air cap hole can also be opened on the top of the core to further improve the demolding effect. In this embodiment, there are two air cap holes, two The gas top holes 111 are distributed diagonally, and the gas top hole 111 is equipped with an air jet valve. The model of the air jet valve in this embodiment is C-AJVSS6-12, and its outer diameter is 6mm. It is made of stainless steel, including the body, piston rod, With springs and elastic split pins, each gas top hole 111 is connected to the corresponding air flow channel 112, and the gas top holes 111 are arranged diagonally to improve the effectiveness of blowing, so that the effective area of the compressed gas blown out by the gas top hole 111 is larger. It is large to improve the demolding effect. The three air flow channels 112 respectively connected with the air cap hole 111 and the side blow hole are opened inside the mold core 110 at intervals, and are connected with the main air channel, which is connected with the external compressed gas source, The side blowing hole and the air top hole 111 can make a uniform air layer between the lunch box and the mold core 110, facilitate the demolding of the lunch box, reduce the defective rate caused by demolding, and provide sufficient cooling water channels Open space to facilitate mold manufacturing and processing.

In order to improve the installation stability of the insert 30 and avoid its loose displacement under the action of compressed gas, the lower side of the side blow hole is provided with a mounting hole for installing fasteners, and the axial direction of the mounting hole is perpendicular to the length of the side blow hole In the direction, the mounting hole 116 is coaxially provided with a mounting hole 116 below the mounting hole. The upper end of the mounting hole 116 communicates with the mounting hole. The lower end of the mounting hole 116 extends downward and penetrates the lower end surface of the movable mold 11, through the setting of the mounting hole 116, The assembly of the fastener can be completed without damaging the integral structure of the core 110; the diameter of the assembly hole 116 is larger than that of the mounting hole, and the connecting position forms a stepped edge, and the wall of the mounting hole is provided with internal threads , The fastener is an inner hexagonal fastening bolt 40, the fastening bolt 40 is installed in the mounting hole, and the upper end of the fastening bolt is against the side wall of the insert 30, and the inner hexagonal bolt is used as the fastener, which is convenient for assembly ; In this embodiment, the cross section of the insert 30 is rectangular, the annular side wall 32 is enclosed by four side walls of a planar structure, the upper end surface of the fastening bolt 40 acts on the lower side wall, and the side wall of the planar structure can Provide a reliable force point for the fastening bolt 40, ensure the fastening effect of the fastening bolt 40, and the insert 30 of this structure is easy to process; to avoid stress concentration, the four end corners of the insert 30 are all arc chamfers 33. The four end corners of the side blow hole are also chamfered to match the end corners of the insert 30. Compared with the right angle, it can effectively avoid the thermal expansion of the insert 30. The right angle end angle directly acts on the inner wall of the side blow hole, causing stress Concentration, causing damage to the mold, causing mold cracking, and avoiding damage to the insert 30, thereby effectively improving the strength and service life of the insert 30 and the mold. In this embodiment, the material of the insert 30 and the core 110 is the same. In order to ensure that they have a consistent coefficient of thermal expansion and contraction, the fit between the insert 30 and the core 110 is improved.

A plurality of vertical cooling water channels 113 are formed at intervals inside 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 they are all opened along the height direction of the mold core 110. In this embodiment, the mold core The height direction of 110 refers to the moving direction of the core 110 when the mold is closed. The lower end of the movable mold 11 is provided with a horizontal cooling water channel 114, and the vertical cooling water channel 113 extends downward and communicates with the horizontal cooling water channel 114. The vertical cooling water channel 113 is equipped with water barriers along its axial direction. The water barrier separates the cooling water channel into water inlet and outlet channels. The vertical cooling water channel 113 and the air flow channel 112 have the same axial direction, which can increase cooling water. The vertical cooling water channel 113 can avoid the air flow channel 112, so that there is enough space inside the mold core 110 to ensure the number of cooling water channels, ensure the cooling effect, and improve the quality of the injection product. The lower end of the movable mold 11 The opening of the horizontal cooling water channel 114 can further improve the cooling effect, and can connect multiple vertical cooling water channels 113 into a continuous water channel, improve cooling efficiency, and facilitate communication with external water supply devices; due to the injection molding of thin-walled single-cavity plastic parts The pressure is high, and the upper end surface of the mold core 110 is the main pressure-bearing part. Therefore, while increasing the depth of the cooling water channel to improve its cooling effect, it is necessary to take into account the structural strength of the mold core 110. Therefore, the upper end surface of the vertical cooling water channel 113 and the mold core The reserved spacing between the upper end surfaces of 110 should be greater than 9mm. In this embodiment, the above reserved spacing is 10mm; since the vertical cooling water channel 113 needs to be cleaned with strong acid regularly, in order to avoid perforation, the vertical cooling water channel 113 and the vertical A safe distance is set between the cooling water channel 113 and the air flow channel 112, and the safe distance is greater than 6 mm. The setting of the reserved distance and the safe distance not only ensures the cooling effect of the cooling water channel, but also ensures the structural strength of the mold core 110, thereby Effectively solve the problems of water leakage in the cooling water channel and cracking of the movable mold 11, and prolong the service life of the mold; the mold core 110 is an integrated structure. After the mold core 110 is formed, the mold core 110 is provided with side blow holes, air cap holes 111 and airflow according to the size The channel 112, the vertical cooling water channel 113, the horizontal cooling water channel 114, the mounting hole, the mounting hole 116, and then the insert 30 is embedded in the side blow hole, and the fastening bolt 40 is installed to the mounting hole from the lower end of the mounting hole 116 Fixing the insert 30 in the middle, and then inserting the air jet valve into the air top hole to complete the processing and assembly of the mold core 110, and the manufacturing process is simple.

The movable mold 11 is formed with a concave guide cone groove 115, the core 110 is recessed in the guide cone groove 115, the fixed mold 12 is formed with a convex guide cone 121, and the cavity 120 is recessed in the guide cone 121. The inner cone surface of the guide cone groove 115 cooperates with the outer cone surface of the guide cone 121 to position and guide the clamping and opening of the movable mold 11 and the fixed mold 12, thereby further improving the matching accuracy of the mold cavity 120 and the mold core 110 , And it is conducive to maintaining the pressure of the plastic part during molding, so as to ensure product quality; the parting surface on the movable mold 11 is also provided with an annular exhaust groove for exhaust during injection molding; the outer cone surface of the guide frustum 121 is along the circumference Four installation grooves are evenly opened in the same direction. Wear blocks 122 are installed in the installation grooves. The wear blocks 122 are installed obliquely, and the inclination angle is consistent with the draft angle of the outer cone. The outer surface of the wear blocks 122 protrudes Set on the outer cone surface, since the movable mold 11 and the fixed mold 12 need to be opened and closed reciprocally, its mating surface is very easy to wear, which affects the mating accuracy of the mold. The setting of the wear block 122 can reduce the wear of the movable mold 11 and the fixed mold 12. Extend the service life of the mold; the shape of the wear block 122 is matched with the installation groove, and is installed in the installation groove by bolts, and an adjustment gasket can be installed between the wear block 122 and the groove bottom of the installation groove to adjust the movement The matching accuracy of the mold 11 and the fixed mold 12, after the fixed mold 12 and the movable mold 11 are worn out, the mating degree of the movable mold 11 and the fixed mold 12 can be adjusted by pads to prevent the molten material from overflowing and flashing; the movable mold 11 Fixed on the movable mold seat plate 14, the bottom surface of the movable mold seat plate 14 is installed with a parallel pad 50 through bolts. The parallel pad 50 is located in the central installation groove on the bottom surface of the movable mold seat plate 14. The parallel pad 50 has high strength For the movable mold seat plate 14, because the thin-walled single-cavity plastic part is formed, in order to ensure product quality, very large injection pressure and clamping force are required. The movable mold seat plate 14 repeatedly acts on the injection pressure and clamping force. The bottom will be concave, which will affect the cooperation of the movable mold 11 and the fixed mold 12, resulting in flashing of the plastic part. The movable mold seat plate 14 can be compensated by setting the parallel spacer 50 to improve its strength, and the spacer can be adjusted by the spacer , Adjust the matching accuracy of the movable mold 11 and the fixed mold 12 to ensure product quality.

The thin-walled single-cavity plastic part forming mold disclosed in the present invention has a compact structure and is convenient to process. Two annular blowing ports can be formed through the cooperation of one side blowing hole and the insert 30, which ensures the demolding effect and reduces Difficulty of mold processing and manufacturing cost; the mold core 110 is provided with an air top hole 111 and a side blow hole, which can form a uniform air layer between the plastic part and the mold core 110 to facilitate the demolding of the plastic part; the mold core 110 adopts an integrated type Structure, high structural strength and stability, long service life, the mold core 110 and the mold cavity 120 are coordinated with high precision under the action of multiple guiding and positioning mechanisms, thereby ensuring the product quality of the plastic parts; wear block 122 and parallel pad The setting of the block 50 can effectively prolong the service life of the mold, and can adjust the matching accuracy of the movable mold 11 and the fixed mold 12 to further ensure the quality of the thin-walled single-cavity plastic part; the distribution of the air flow channel 112 and the cooling water channel is reasonable and effective, and can ensure The structural strength of the core 110 ensures the demolding effect and cooling effect.

It should be understood that in the claims and specification of the present invention, all "including..." should be understood as open-ended meaning, that is, its meaning is equivalent to "at least including...", and should not be understood as closed-ended Meaning, that is, its meaning should not be understood as "only containing...". The terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features.

The above are only specific embodiments of the present invention, but the scope of protection of the present invention is not limited to this, changes, modifications, additions or substitutions made by those skilled in the art within the essential scope of the present invention , Should be covered within the scope of protection of the invention.

Claims

A thin-walled single-cavity plastic part forming mold, comprising a fixed mold (12), a movable mold (11), a guide mechanism and a pouring system, characterized in that a film cavity is formed in the middle of the fixed mold (12), and the movable mold ( 11) A mold core (110) is formed in the middle of the mold core (110), which is an integrated structure, and the mold core (110) and the mold cavity (120) cooperate to form a cavity for forming a thin-walled single cavity plastic part; (110) is provided with straight side blowing holes, the side blowing holes penetrate the entire core (110) transversely and communicate with the corresponding air flow channel (112), and the air flow channel (112) is formed inside the mold core (110) The side blowing hole is embedded with an insert (30), the insert (30) has a first end surface (31), a second end surface and an annular side wall (32), the annular side wall (32) and the side The inner wall of the blow hole is adapted, the installation gap between the insert (30) and the side blow hole forms an air gap, and the outer edges of the first end face (31) and the second end face are opposite to the two ports of the side blow hole. Cooperate to form two annular blowing ports, both of which are distributed on the side molding surface of the core (110), and the first end surface (31) and the second end surface are both aligned with the side of the core (110). The part forming surface matches to form an auxiliary forming surface.
The thin-walled single-cavity plastic molding mold according to claim 1, wherein a plurality of vertical cooling water channels (113) are formed at intervals inside the mold core (110), and the vertical cooling water channels The axial direction of (113) is consistent with the axial direction of the air flow channel (112), and both are opened along the height direction of the mold core (110). The lower end surface of the movable mold (11) is provided with a horizontal cooling water channel (114). The straight cooling water channel (113) extends downward and communicates with the horizontal cooling water channel (114).
The thin-walled single-cavity plastic molding mold according to claim 2, characterized in that, between the vertical cooling water channels (113) and between the vertical cooling water channels (113) and the air flow channel (112) A safety distance is set, and the safety distance is greater than 6mm.
A thin-walled single-cavity plastic molding mold according to any one of claims 1 to 3, wherein the movable mold (11) is formed with a concave guide cone groove (115), The mold core (110) is sunken in the guide cone groove (115), the fixed mold (12) is formed with an outwardly convex guide frustum (121), and the cavity (120) is sunken in the guide frustum (121), The inner cone surface of the guide cone groove (115) matches the outer cone surface of the guide cone (121) to guide the clamping and opening of the movable mold (11) and the fixed mold (12). The guide cone (121) The outer cone surface of the) is evenly provided with a plurality of installation grooves along the circumferential direction. The installation groove is equipped with a wear block (122). The wear block (122) is installed obliquely, and its inclination angle is consistent with the extraction of the outer cone surface. The mold slopes are consistent.
The thin-walled single-cavity plastic molding mold according to claim 4, wherein the shape of the wear-resistant block (122) is matched with the installation groove, and is installed in the installation groove by bolts. The outer surface of (122) protrudes from the outer conical surface, and an adjustment gasket can be installed between the wear block (122) and the bottom of the installation groove to adjust the coordination of the movable mold (11) and the fixed mold (12) Accuracy.
The thin-walled single-cavity plastic molding mold according to claim 1, wherein the movable mold (11) is fixed on the movable mold seat plate (14), and the movable mold seat plate (14) Parallel pads (50) are installed on the bottom surface of the parallel pads (50), and the strength of the parallel pads (50) is higher than that of the movable mold seat plate (14).
The thin-walled single-cavity plastic molding mold according to claim 1, wherein the movable mold (11) and the fixed mold (12) have two groups, and they cooperate to form two cavities. The gating system includes a main runner (21) and a runner (22). Each cavity is connected to two runners (22). The runners (22) are centered on the runner (21) and arranged symmetrically. .
The thin-walled single-cavity plastic molding mold according to claim 1 or 2 or 3 or 6 or 7, wherein the lower side of the side blow hole is provided with an installation hole for installing fasteners, The axial direction of the mounting hole is perpendicular to the length direction of the side blowing hole. A mounting hole (116) is coaxially arranged below the mounting hole. The upper end of the mounting hole (116) is connected to the mounting hole, and the lower end of the mounting hole (116) faces It extends downward and penetrates the lower end surface of the movable mold (11).
The thin-walled single-cavity plastic molding mold according to claim 8, wherein the cross section of the insert (30) is rectangular, and its annular side wall (32) is surrounded by four flat side walls. Combined.
The thin-walled single-cavity plastic molding mold according to claim 9, wherein the four end corners of the insert (30) are all arc chamfers (33), and the four side blow holes The end corners are also chamfers matched with the end corners of the insert (30).