Intensive multi-cavity plane product injection mold

Abstract

The utility model provides a dense multi-cavity plane product injection mold which comprises a lower mold and an upper mold, an upper mold plate is arranged at the lower end of the upper mold, a lower mold plate is arranged at the upper end of the lower mold, and a plurality of forming cavities are formed between the lower bottom surface of the upper mold plate and the upper bottom surface of the lower mold plate; mounting holes which are the same as the forming cavities in number and are in one-to-one correspondence with the forming cavities are formed in the upper mold plate, hot nozzles are mounted in the mounting holes, discharging ends at the lower ends of the hot nozzles are communicated with the forming cavities, the hot nozzles are sleeved with cooling sleeves, annular grooves are formed in the side walls of the cooling sleeves, and the annular grooves are communicated with the hot nozzles. An annular groove is formed in the upper die plate, an annular cooling cavity is formed between the annular groove and the inner wall of the mounting hole, sealing rings are arranged at the two ends of the cooling cavity, a cooling flow channel is formed in the upper die plate, and the cooling flow channel is communicated with the cooling cavity and used for cooling. The injection mold for the dense multi-cavity planar product is compact in structure, convenient to assemble, low in production cost, high in cooling efficiency and good in cooling effect.

Description

Technical Field

[0001] The utility model relates to a mold, in particular to a dense multi-cavity flat product injection mold. Background Art

[0002] Injection molding machine, also known as injection molding machine or injection machine, is the main molding equipment that uses plastic molding molds to make plastic products of various shapes from thermoplastics or thermosetting plastics. It is divided into vertical, horizontal, and all-electric types. The injection molding machine can heat the plastic and apply high pressure to the molten plastic to make it ejected and fill the mold cavity.

[0003] When producing smaller flat parts, in order to improve production efficiency, multiple cavities are processed on the template to enable multiple products to be formed simultaneously. Since the distance between two adjacent cavities is relatively close, traditional cooling cannot achieve fast and effective cooling, affecting production efficiency and product quality. Utility Model Content

[0004] Technical issues to be solved

[0005] The technical problem to be solved by the utility model is to provide a dense multi-cavity flat product injection mold with compact structure, convenient assembly, small installation volume, good cooling effect and high production efficiency.

[0006] Technical solutions to the problem

[0007] The utility model provides a dense multi-cavity planar product injection mold, which includes a lower mold 2 and an upper mold 1 vertically slidably mounted just above the lower mold 2, an upper mold 5 is provided at the lower end of the upper mold 1, a lower mold 6 is provided at the upper end of the lower mold 2, and a plurality of molding cavities are provided between the lower bottom surface of the upper mold 5 and the upper bottom surface of the lower mold 6; the upper mold 5 is provided with mounting holes 50 having the same number as the molding cavities and corresponding to each other, the mounting holes 50 are located just above the molding cavities, a hot nozzle 7 is installed in the mounting holes 50, a lower end discharge end of the hot nozzle 7 is communicated with the molding cavity and used for injection, a cooling sleeve 8 is provided on the outer sleeve of the hot nozzle 7, a side wall of the cooling sleeve 8 is provided with an annular groove 82, an annular cooling cavity is formed between the annular groove 82 and the inner wall of the mounting hole, sealing rings are provided at both ends of the cooling cavity, a cooling channel 51 is provided in the upper mold 5, the cooling channel 51 is communicated with the cooling cavity and used for cooling the hot nozzle 7 and the molding cavity.

[0008] Furthermore, the molding cavities are arranged in a matrix.

[0009] Furthermore, the upper template 5 and the lower template 6 are multiple groups, and multiple molding cavities are provided between each group of upper templates and lower templates.

[0010] Furthermore, there are multiple cooling channels 51, and each cooling channel 51 passes through at least two cooling cavities.

[0011] Furthermore, the mounting hole 50 is a stepped hole with an open upper end, the cooling sleeve 8 is cylindrical and is sleeved in the mounting hole, both ends of the cooling sleeve 8 are penetrated by a hole body for accommodating the hot nozzle 7 to pass through, the upper end of the cooling sleeve 8 extends radially outward and forms an annular protrusion 81, the lower end of the annular protrusion 81 contacts the step surface in the stepped hole and realizes axial limitation, the upper end of the annular groove 82 is provided with a first sealing ring mounting groove 801 for installing a sealing ring, the lower end surface of the cooling sleeve 8 contacts the bottom surface of the mounting hole, and a sealing ring is provided therebetween.

[0012] Furthermore, at least two screw holes 810 for connecting with the upper mold are evenly distributed on the top surface of the annular protrusion 81 in the circumferential direction.

[0013] Furthermore, a notch 83 for radial positioning is formed on the side wall of the annular protrusion 81 .

[0014] Furthermore, the lower end of the annular groove 82 extends axially downward and penetrates to the outside of the cooling jacket.

[0015] Furthermore, the lower end of the cooling jacket 8 extends radially inward to form a sealing portion 84, the lower end surface of the sealing portion 84 is a plane and serves as a sealing surface 84a, and the bottom surface of the stepped hole is provided with a second sealing ring installation groove 501 for installing a sealing ring.

[0016] Furthermore, the cooling chamber is close to the discharge end of the hot nozzle.

[0017] Beneficial Effects

[0018] The utility model discloses a dense multi-cavity flat product injection mold, in which the molding cavities are arranged in a matrix, which is convenient for processing, and is also convenient for setting the overall structure and the cooling channel, thereby reducing the processing difficulty and manufacturing cost; the addition of a cooling jacket can realize independent cooling of the hot nozzle, with high cooling efficiency and good effect, and is convenient for controlling the internal temperature, thereby improving the molding efficiency and effect; the cooling chamber is arranged on the side wall of the cooling jacket, thereby increasing the contact area with the cooling water, which is convenient for processing and has high cooling efficiency; the cooling chamber is arranged at the lower end, and while cooling the hot nozzle, the cooling efficiency of the molding cavity is improved, thereby improving the product molding efficiency; a plurality of cooling chambers are arranged on the cooling channel, and while improving the cooling efficiency, the number of cooling channels can be reduced, thereby reducing the occupied space and production cost; the utility model discloses a dense multi-cavity flat product injection mold, which has a compact structure, is convenient for assembly, has low production cost, and has high cooling efficiency and good effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1This is a schematic diagram of the structure of the injection mold for dense multi-cavity flat products of the utility model;

[0020] Figure 2 This is a schematic diagram of the internal structure of the injection mold for dense multi-cavity flat products of the utility model;

[0021] Figure 3 This is the front view of the injection mold for dense multi-cavity flat products of the utility model;

[0022] Figure 4 It is a transverse cross-sectional view of the injection mold of the utility model for dense multi-cavity flat products;

[0023] Figure 5 It is a longitudinal cross-sectional view of the injection mold for dense multi-cavity flat products of the utility model;

[0024] Figure 6 for Figure 5 Enlarged view of part A in the middle;

[0025] Figure 7 It is a schematic diagram of the installation of the cooling jacket of the injection mold of the dense multi-cavity flat product of the utility model;

[0026] Figure 8 It is a schematic diagram of the structure of the cooling jacket of the injection mold of the dense multi-cavity flat product of the utility model;

[0027] Fig. 9 It is a cross-sectional view of the cooling jacket of the injection mold for dense multi-cavity flat products of the utility model. DETAILED DESCRIPTION

[0028] The following is a detailed description of the embodiments of the present utility model in conjunction with the accompanying drawings.

[0029] See also Figure 1-Figure 9 The utility model provides a dense multi-cavity planar product injection mold, including a lower mold 2 and an upper mold 1. The upper mold 1 is vertically slidably fitted on the top of the lower mold 2 through a guide column to realize mold closing and mold separation. An upper mold plate 5 is provided at the lower end of the upper mold 1, and a lower mold plate 6 is provided at the upper end of the lower mold 2. Molding surfaces are respectively provided on the lower bottom surface of the upper mold plate 5 and the upper bottom surface of the lower mold plate, thereby forming a molding cavity. The molding cavity is used for injection molding of the product. The molding cavity is multiple and arranged in a matrix, that is, it is provided with multiple rows, and each row is provided with multiple, forming a row and column arrangement. In this embodiment, 64 precision molding cavities are provided, which can realize 64 product molding; in this embodiment, the upper mold plate 5 and the lower mold plate 6 are multiple groups, each group includes an upper mold plate and a lower mold plate, which can form mold closing and mold separation, preferably an even number, and are symmetrically arranged in two rows. Multiple molding cavities arranged in a matrix are provided between the upper mold plate and the lower mold plate of each group, which can reduce the manufacturing cost of the mold and have low maintenance cost.

[0030] Mounting holes 50 are provided in the upper mold plate 5. The number of mounting holes 50 is the same as that of the molding cavities and they correspond one to one, that is, one mounting hole corresponds to one molding cavity. The corresponding mounting hole 50 is located directly above the molding cavity. A hot nozzle 7 is installed in the mounting hole 50. A mounting cavity is formed in the upper mold. A first guide seat 31 and multiple second guide seats 32 are provided in the mounting cavity, wherein the first guide seat is located at the upper end of the second guide seat, and its inlet end is connected to the gate sleeve for raw material injection. The outlet end of the first guide seat is connected to the inlet end of the second guide seat 32, and the flow channel is branched into multiple paths and respectively connected to the feed end of each hot nozzle 7. Electric heating devices are provided on the first guide seat 31, the second guide seat 32 and the hot nozzle to control the temperature of the internal raw material.

[0031] The lower discharge end of the hot nozzle 7 is connected to the molding cavity for injecting material into the molding cavity. A cooling sleeve 8 is provided on the outer shell of the hot nozzle 7. An annular groove 82 is provided on the side wall of the cooling sleeve 8. An annular cooling cavity is formed between the annular groove 82 and the inner wall of the mounting hole. Sealing rings are provided at both ends of the cooling cavity for sealing. At the same time, a cooling channel 51 is opened in the upper mold plate 5. The cooling channel 51 is connected to the cooling cavity for cooling the hot nozzle 7 and the molding cavity.

[0032] In order to improve the cooling efficiency and effect, in the present embodiment, there are multiple cooling channels 51, and each cooling channel 51 passes through at least two cooling cavities, that is, at least two cooling cavities are provided on the same cooling channel, preferably four, which can improve the cooling efficiency while reducing the amount of cooling channels to reduce the occupied space and production cost.

[0033] In the present application, the mounting hole 50 is a stepped hole with an open upper end. The cooling sleeve 8 is cylindrical and is sleeved in the mounting hole. Its outer diameter is the same as the inner diameter of the mounting hole and can be just sleeved in the mounting hole. A hole body 80 is passed through the upper and lower ends of the cooling sleeve 8. The hole body 80 is used to allow the heat nozzle 7 to pass through. The upper end of the cooling sleeve 8 extends radially outward to form an annular protrusion 81. The lower end of the annular protrusion 81 contacts the step surface in the stepped hole to achieve axial mounting limit. A screw hole 810 is opened on the top surface of the annular protrusion 81. The screw hole 81 0 is at least two and evenly distributed circumferentially, which is used to connect with the upper mold (seat), a concave hole 83 is opened on the side wall of the annular protrusion 81, and a positioning bolt is provided on the upper mold plate, which is just stuck in the concave hole to achieve radial positioning; a first sealing ring installation groove 801 is opened on the side wall of the cooling jacket, and the first sealing ring installation groove 801 is located at the upper end of the annular groove 82, which is used to install the sealing ring, the lower end surface of the cooling jacket 8 contacts the bottom surface of the installation hole, and a sealing ring is also provided between the lower end surface of the cooling jacket and the bottom surface of the installation hole.

[0034] In order to improve the cooling efficiency of the molding cavity, in the present embodiment, the cooling cavity is arranged at one end of the discharge end near the hot nozzle; specifically, the lower end of the annular groove 82 extends axially downward and passes through the outside of the cooling jacket, which increases the axial length of the cooling cavity and makes the lower end of the cooling cavity close to the molding cavity. At the same time, the lower end of the cooling jacket 8 extends radially inward to form an annular sealing portion 84, and the lower end face of the sealing portion 84 is a plane, serving as a sealing surface 84a, which is used to fit in contact with the bottom surface of the mounting hole, and a second sealing ring mounting groove 501 is provided on the bottom surface of the stepped hole (mounting hole), and the second sealing ring mounting groove 501 is used to install a sealing ring, thereby realizing the end face sealing of the cooling jacket.

[0035] When discharging materials, the materials are automatically sucked out without ejectors, so the manufacturing cost and the use cost are low, and the discharging effect is good.

[0036] The utility model discloses a dense multi-cavity flat product injection mold, in which the molding cavities are arranged in a matrix, which is convenient for processing, and is also convenient for setting the overall structure and the cooling channel, thereby reducing the processing difficulty and manufacturing cost; the addition of a cooling jacket can realize independent cooling of the hot nozzle, with high cooling efficiency and good effect, and is convenient for controlling the internal temperature, thereby improving the molding efficiency and effect; the cooling chamber is arranged on the side wall of the cooling jacket, thereby increasing the contact area with the cooling water, which is convenient for processing and has high cooling efficiency; the cooling chamber is arranged at the lower end, and while cooling the hot nozzle, the cooling efficiency of the molding cavity is improved, thereby improving the product molding efficiency; a plurality of cooling chambers are arranged on the cooling channel, and while improving the cooling efficiency, the number of cooling channels can be reduced, thereby reducing the occupied space and production cost; the utility model discloses a dense multi-cavity flat product injection mold, which has a compact structure, is convenient for assembly, has low production cost, and has high cooling efficiency and good effect.

[0037] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principle of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A dense multi-cavity flat product injection mold, characterized in that: It comprises a lower die and an upper die which is vertically slidably mounted above the lower die, an upper die being arranged at the lower end of the upper die, a lower die being arranged at the upper end of the lower die, a plurality of molding cavities being arranged between the lower bottom surface of the upper die and the upper bottom surface of the lower die; mounting holes which are the same in number as the molding cavities and correspond one to one to each other are arranged in the upper die, the mounting holes are located above the molding cavities, a hot nozzle is arranged in the mounting holes, a discharge end of the lower end of the hot nozzle is connected with the molding cavity and is used for injection, a cooling sleeve is arranged outside the hot nozzle, an annular groove is arranged on the side wall of the cooling sleeve, an annular cooling cavity is formed between the annular groove and the inner wall of the mounting hole, sealing rings are arranged at both ends of the cooling cavity, a cooling channel is arranged in the upper die, the cooling channel is connected with the cooling cavity and is used for cooling the hot nozzle and the molding cavity.

2. The dense multi-cavity flat product injection mold according to claim 1, characterized in that: The molding cavities are arranged in a matrix.

3. The dense multi-cavity flat product injection mold according to claim 1 or 2, characterized in that: The upper template and the lower template are multiple groups, and multiple molding cavities are arranged between each group of upper templates and lower templates.

4. The dense multi-cavity flat product injection mold according to claim 1, characterized in that: There are a plurality of cooling channels, and each cooling channel passes through at least two cooling cavities.

5. The dense multi-cavity flat product injection mold according to claim 1, characterized in that: The mounting hole is a stepped hole with an open upper end, the cooling sleeve is cylindrical and is sleeved in the mounting hole, both ends of the cooling sleeve are penetrated by a hole body for allowing the hot nozzle to pass through, the upper end of the cooling sleeve extends radially outward and forms an annular protrusion, the lower end of the annular protrusion contacts the step surface in the stepped hole and realizes axial limitation, the upper end of the annular groove is provided with a first sealing ring mounting groove for installing a sealing ring, the lower end surface of the cooling sleeve contacts the bottom surface of the mounting hole, and a sealing ring is provided therebetween.

6. The dense multi-cavity flat product injection mold according to claim 5, characterized in that: The top surface of the annular protrusion is evenly distributed in the circumference with at least two screw holes for connecting with the upper mold.

7. The dense multi-cavity flat product injection mold according to claim 5, characterized in that: The side wall of the annular protrusion is provided with a notch for radial positioning.

8. The dense multi-cavity flat product injection mold according to claim 5, characterized in that: The lower end of the annular groove extends axially downward and penetrates outside the cooling jacket.

9. The dense multi-cavity flat product injection mold according to claim 8, characterized in that: The lower end of the cooling jacket extends radially inward to form a sealing portion, the lower end surface of the sealing portion is a plane and serves as a sealing surface, and a second sealing ring installation groove for installing a sealing ring is provided on the bottom surface of the stepped hole.

10. The dense multi-cavity flat product injection mold according to claim 1, characterized in that: The cooling chamber is close to the discharge end of the hot nozzle.

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