CN101712182B - Powder micro-injection molding die of printing head ceramic substrate equipped with array type micro-pores - Google Patents

Abstract

The invention relates to a powder microinjection molding mold of a printing head ceramic substrate with arrayed microholes, which relates to a molding mold of the printing head ceramic substrate. The invention solves the problem that the existing micro-injection mold cannot mold the ceramic substrate of the printing head with arrayed micro-holes. The movable formwork of the present invention is arranged opposite to the fixed formwork, and a slanted guide column is fixedly installed in the installation hole, the first side slider is set on one slanted guide column, the second side slider is set on the other slanted guide column, and the second side slider is set on the other slanted guide column. The one-side slider, the second side slider, the fixed platen and the movable platen form a cavity of the ceramic substrate, and a plurality of tiny cores are arranged in the cavity of the ceramic substrate, and at least two The ejector pin is fixedly mounted on the push guide post fixing plate, and the pushing guide post fixing plate is fixedly connected with the push rod fixing plate. The invention shortens the forming cycle of ceramic blanks with hundreds of micro-holes to tens of seconds, meets the precision requirements of the micro-holes, reduces the production cycle of products, and reduces the production cost of parts.

Description

Powder microinjection molding molds for printhead ceramic substrates with arrayed microwells

technical field

The invention relates to a forming mold for a printing head ceramic substrate, belonging to the technical field of manufacturing the printing head ceramic substrate.

Background technique

At present, the number of microholes on the print head substrate has increased from 16 holes to 32 holes, and then increased to 64 holes, 128 holes, and 256 holes, and is gradually increasing. However, the traditional microhole array processing technology is complicated and the production Low efficiency and high cost of parts. In addition, the corrosion resistance and wear resistance of the materials currently used are far lower than those of ceramic materials. The use of powder micro-injection molding technology to prepare the ceramic substrate of the print head can solve the difficult and costly problems of processing ceramic materials by traditional processes, thus greatly Improve processing efficiency, reduce parts production costs, and increase product life. However, powder microinjection molding molds for printhead ceramic substrates with arrayed microwells are not yet available.

Contents of the invention

The purpose of the present invention is to solve the problem that the existing micro-injection molding mold cannot form the ceramic substrate of the printing head with arrayed micro-holes, and then provide a powder micro-injection molding of the ceramic substrate of the printing head with arrayed micro-holes mold.

The technical solution of the present invention is: the powder microinjection molding mold of the ceramic substrate of the printing head with arrayed microholes is composed of a fixed template, two inclined guide pillars, a first side slider, a plurality of micro cores, a second side slider Block, movable mold backing plate, movable template, at least two ejector pins, ejector pin fixing plate, pushing guide post, pushing guide post fixing plate, multiple electric heating rods and thermocouples; the moving template is set opposite to the fixed template , there is a main channel on the central axis of the fixed formwork, and there are two installation holes on the fixed formwork, the two installation holes are arranged symmetrically along the central axis of the fixed formwork, and the two installation holes are radially arranged, each A slanted guide post is fixedly installed in each mounting hole, and an slanted guide post avoidance groove is opened on the movable template, and the guide end of the slanted guide post protrudes out of the movable template along the slanted guide post avoidance groove, and the first side slider is set on the On one slanted guide post, the second side slider is set on the other slanted guide post, and the first side slider and the second side slider are located between the movable template and the fixed template, and the first side slider , the second side slider, the fixed plate and the movable plate form a ceramic substrate cavity, the movable plate is fixed on the center position of the corresponding end face of the movable plate and the fixed plate, and the plurality of miniature The cores are arranged in the cavity of the ceramic substrate, and a plurality of micro cores are fixedly installed on the movable mold backing plate and the fixed mold plate in a straight line. The quantity is the same, and the micro-miniature cores on the fixed template and the micro-miniature cores on the movable mold backing plate are arranged in a staggered manner, and a plurality of micro-miniature cores are fixedly installed on the second side slider in a straight line, and the first The quantity of the miniature cores on the two side sliders is twice that of the miniature cores on the fixed plate, and the miniature cores at odd positions on the second side slider are in vertical contact with the miniature cores on the fixed plate, The micro-miniature cores on the even-numbered positions on the second side slider are in vertical contact with the micro-miniature cores on the backing plate of the movable mold, and at least two ejector pins are fixedly installed on the ejector pin fixing plate, each ejector pin The ejection end passes through the movable formwork and the movable formwork backing plate in sequence, the pushing guide pillar is fixedly installed on the pushing guide pillar fixing plate, the pushing guide pillar fixing plate is fixedly connected with the ejector pin fixing plate, the moving template and the fixed template There are a plurality of coolant flow channels on the movable template, and a plurality of blind holes are opened on the movable template, and the opening positions of the plurality of blind holes correspond to the cavity of the ceramic substrate, and the thermocouple is installed in the plurality of blind holes. In any one, an electric heating rod is installed in each of the remaining blind holes.

Compared with the prior art, the present invention has the following effects: the micro-injection molding mold of the present invention realizes the molding of the ceramic substrate of the printing head with arrayed micro-holes, and realizes the one-time injection molding of several or even hundreds of micro-holes. The forming cycle of the ceramic blank with hundreds of micro-holes is shortened to tens of seconds, and the precision requirements of the micro-holes are met, so that the production cycle of the product is significantly reduced, and the production cost of the parts can be significantly reduced.

Description of drawings

Fig. 1 is a front sectional view of the present invention, Fig. 2 is a left side view of Fig. 1, Fig. 3 is a D-D sectional view of Fig. 1, Fig. 4 is a layout diagram of a micro core in a cavity of a ceramic substrate, and Fig. 5 is a micro core Layout drawing on the second side slider.

Detailed ways

Specific Embodiment 1: This embodiment is described with reference to FIGS. 1 to 4. The powder microinjection molding mold of the print head ceramic substrate with arrayed microholes in this embodiment consists of a fixed template 1, two inclined guide pillars 2, a second One side slider 3, multiple miniature cores 4, second side slider 5, movable mold backing plate 6, movable template 7, at least two ejector pins 8, ejector pin fixing plate 9, push guide post 10, push guide Column fixing plate 11, a plurality of electric heating rods 12 and thermocouples 13; the movable template 7 is arranged opposite to the fixed template 1, and the central axis 1-3 of the fixed template 1 has a main channel 1-1, so The main channel 1-1 is conical, and the fixed template 1 is provided with two installation holes 1-2, and the two installation holes 1-2 are symmetrically arranged along the central axis 1-3 of the fixed template 1, and the two installation holes The holes 1-2 are radially arranged, and each installation hole 1-2 is fixed with an oblique guide post 2, and the movable template 7 is provided with an oblique guide post avoidance groove 7-1, and the guide end of the oblique guide post 2 2-1 Extend the movable template 7 along the oblique guide column avoidance groove 7-1, the first side slider 3 is set on one oblique guide column 2, and the second side slider 5 is sleeved on the other oblique guide column 2 , and the first side slider 3 and the second side slider 5 are located between the movable template 7 and the fixed template 1, the first side slider 3, the second side slider 5, the fixed template 1 and the movable template 7 The four form a ceramic substrate cavity 14, the movable mold backing plate 6 is fixed on the center position of the corresponding end face of the movable template 7 and the fixed template 1, and the plurality of miniature cores 4 are arranged in the ceramic substrate cavity. 14, on the movable mold backing plate 6 and the fixed template 1, a plurality of tiny cores 4 are fixedly installed in a straight line, and the tiny cores 4 on the fixed template 1 and the tiny cores on the movable mold backing plate 6 The number of 4 is the same, and the micro cores 4 on the fixed template 1 and the micro cores on the movable mold backing plate 6 are staggered and oppositely arranged, and the second side slider 5 is fixedly installed with a plurality of micro cores Small core 4, and the quantity of the tiny core 4 on the second side slider 5 is twice that of the tiny core 4 on the fixed template 1, and the tiny core 4 on the odd position on the second side slider 5 4 is in vertical contact with the tiny core 4 on the fixed template 1, and the tiny core 4 on the even-numbered position on the second side slider 5 is in vertical contact with the tiny core 4 on the movable mold backing plate 6, and the top At least two ejector rods 8 are fixedly installed on the rod fixing plate 9, and the ejection end 8-1 of each ejector rod 8 passes through the movable template 7 and the movable template backing plate 6 in turn, and the pushing guide post 10 is fixedly installed on the pushing On the guide post fixed plate 11, push the guide post fixed plate 11 to be fixedly connected with the ejector pin fixed plate 9, and a plurality of coolant flow channels 15 are opened on the movable template 7 and the fixed template 1, and on the movable template 7 There are a plurality of blind holes 7-2, and the opening positions of the plurality of blind holes 7-2 correspond to the cavity 14 of the ceramic substrate, and the thermocouple 13 is installed in any one of the plurality of blind holes 7-2, and the rest An electric heating rod 12 is respectively installed in each blind hole 7-2.

Specific Embodiment 2: This embodiment is described with reference to FIG. 3 . The drafting angle α of the sprue 1 - 1 on the fixed plate 1 of this embodiment is 1-3°. This arrangement facilitates demoulding. Other compositions and connections are the same as in the first embodiment.

Specific Embodiment 3: This embodiment is described with reference to FIG. 3 . The diameter of the large-diameter end of the sprue 1 - 1 on the fixed plate 1 of this embodiment is 2-4 mm. Such an arrangement is beneficial for feeding and filling the cavity during injection molding, and facilitates demoulding of molded parts. Other compositions and connections are the same as those in the second embodiment.

Specific Embodiment 4: This embodiment is described with reference to FIG. 4 . The diameter of the micro core 4 in this embodiment is 0.1-1.0 mm. With such arrangement, micro holes of different sizes can be formed. Other compositions and connections are the same as those in Embodiment 1, 2 or 3.

Specific embodiment five: This embodiment is described in conjunction with Fig. 3, the movable template 7, the fixed template 1, the movable mold backing plate 6, the first side slider 3 and the second side slider 5 of the present embodiment all adopt the alloy material of nickel Made of alloy steel or chrome alloy steel. Such setting ensures the wear resistance of the molding die and prevents it from being worn out after multiple moldings, resulting in changes in positioning accuracy. Other compositions and connections are the same as in Embodiment 4.

Embodiment 6: This embodiment is described with reference to FIG. 4 . The distance L between two adjacent miniature cores 4 on the movable mold backing plate 6 of this embodiment is ≥ 0.16 mm. With such a setting, the molding precision is higher and the dimensional precision of the product is guaranteed. Other compositions and connections are the same as those in Embodiment 1, 2, 3 or 5.

Embodiment 7: This embodiment is described with reference to FIG. 4 . The distance K between two adjacent tiny cores 4 on the fixed template 1 of this embodiment is ≥ 0.16 mm. With such a setting, the molding precision is higher and the dimensional precision of the product is guaranteed. Other compositions and connections are the same as those in Embodiment 6.

Embodiment 8: This embodiment is described with reference to FIG. 5 . The distance between two adjacent tiny cores 4 on the second side slider 5 of this embodiment is H≥0.16mm. With such a setting, the molding precision is higher and the dimensional precision of the product is guaranteed. Other compositions and connections are the same as those in Embodiment 7.

The working process of the molding die of the present invention is as follows (see Fig. 1～Fig. 4): the fixed template 1 of the present invention is fixed on the fixed mold frame of the injection machine by bolts, and the movable template 7 is also fixed on the injection motorized mold frame by bolts. The guide post 10 is connected with the ejection mechanism of the injection machine by the positioning pin. Before injection molding, the forming mold is closed until the movable platen 7 and the fixed platen 1 are in contact, and the forming mold is automatically heated to the set temperature after the cavity 14 of the ceramic substrate is closed. Then the nozzle of the injection machine moves forward to contact the fixed template 1, and injects the molten feed material containing ultrafine ceramic particles into the cavity 14 of the ceramic substrate through the main channel 1-1. After the injection is finished, start the cooling system to reduce the temperature of the molding mold to the set temperature, so that the feed material is cooled and solidified. During the mold opening process, the green ceramic substrate is left on the fixed plate 6 of the movable mold, and the tiny core 4 on the fixed plate 1 is gradually released from the green ceramic substrate. 3 and the second side slider 5 are gradually separated to both sides, and the second side slider 5 drives the tiny core 4 above it to gradually escape from the ceramic substrate green body. After the mold is opened, the mechanical ejection method is adopted, and the ceramic substrate green body is ejected from the movable mold fixed plate 6 through the ejector pin 8, and the tiny core on the movable mold backing plate 6 is released from the ceramic substrate green body during this process . Thus, the forming of the ceramic substrate green body with the arrayed micro-hole printing head is completed, and the powder microinjection molding of the ceramic substrate of the printing head is realized.

Claims (8)

1. The powder microinjection molding mold of the ceramic substrate of the printing head with arrayed microholes, which consists of a fixed template (1), two inclined guide posts (2), a first side slider (3), and a plurality of micro Core (4), second side slider (5), movable mold backing plate (6), movable template (7), at least two ejector pins (8), ejector pin fixing plate (9), push guide post (10 ), push the guide post fixing plate (11), a plurality of electric heating rods (12) and thermocouples (13); it is characterized in that: the moving template (7) is set opposite to the fixed template (1), and the fixed template (1) A main channel (1-1) is opened on the central axis (1-3) of the formwork (1), and two installation holes (1-2) are opened on the fixed formwork (1), and the two installation holes (1-2) 2) Arranged symmetrically along the central axis (1-3) of the fixed formwork (1), and the two installation holes (1-2) are radially arranged, and each installation hole (1-2) is fixed with an oblique guide column (2), the moving template (7) is provided with an oblique guide column avoidance groove (7-1), and the guide end (2-1) of the oblique guide column (2) is arranged along the oblique guide column avoidance groove (7-1) ) stretches out the movable template (7), the first side slide block (3) is set on a slanted guide post (2), and the second side slide block (5) is set on another slant guide post (2) , and the first side slider (3) and the second side slider (5) are located between the movable template (7) and the fixed template (1), the first side slider (3), the second side slider (5), the fixed template (1) and the movable template (7) are surrounded by the ceramic substrate cavity (14), and the movable template backing plate (6) is fixed on the movable template (7) and the fixed template (1) At the central position of the opposite end face, the plurality of miniature cores (4) are arranged in the cavity (14) of the ceramic substrate, and both the movable mold backing plate (6) and the fixed mold plate (1) are in the shape of a line Fixedly installed with a plurality of miniature cores (4), the miniature cores (4) on the fixed template (1) are consistent with the quantity of the miniature cores (4) on the movable mold backing plate (6), and the fixed template ( 1) The micro cores (4) on the movable mold backing plate (6) are interlaced and oppositely arranged, and the second side slider (5) is fixedly installed with a plurality of micro cores in a straight line (4), and the quantity of the miniature core (4) on the second side slide block (5) is twice of the miniature core (4) on the fixed template (1), the second side slide block (5) ) on the odd-numbered position on the micro-core (4) is in vertical contact with the micro-core (4) on the fixed template (1), and the micro-core (4) on the even-numbered position on the second side slider (5) 4) vertical contact with the miniature core (4) on the movable mold backing plate (6), at least two ejector pins (8) are fixedly installed on the ejector pin fixing plate (9), each ejector pin (8) The ejection end (8-1) of the pusher passes through the movable formwork (7) and the movable formwork backing plate (6) in turn, and the push guide post (10) is fixedly installed on the push guide post fixing plate (11), and the push guide post The fixed plate (11) is fixedly connected with the ejector pin fixed plate (9), and a plurality of coolant flow passages (15) are opened on the movable template (7) and the fixed template (1), and the movable template (7) ) has multiple blind holes (7-2), and many The opening position of each blind hole (7-2) is corresponding to the cavity (14) of the ceramic substrate, and the thermocouple (13) is installed in any one of a plurality of blind holes (7-2), and each of the remaining blind holes An electric heating rod (12) is respectively installed in the holes (7-2). 2. The powder microinjection molding mold of the print head ceramic substrate with arrayed microholes according to claim 1, characterized in that: the demoulding angle of the sprue (1-1) on the fixed template (1) The degree (α) is 1 to 3°. 3. the powder microinjection mold of the print head ceramic substrate with arrayed microholes according to claim 2, is characterized in that: the large-diameter end of the sprue (1-1) on the fixed template (1) The diameter is 2-4mm. 4. The powder micro-injection molding mold of the print head ceramic substrate with arrayed microholes according to claim 1, 2 or 3, characterized in that: the diameter of the micro core (4) is 0.1-1.0 mm. 5. The powder microinjection molding mold of the printhead ceramic substrate with arrayed microholes according to claim 4, characterized in that: the movable template (7), the fixed template (1), the movable mold backing plate (6 ), the first side slider (3) and the second side slider (5) are all made of nickel alloy steel or chromium alloy steel. 6. According to claim 1, 2, 3 or 5, the powder microinjection molding mold of the print head ceramic substrate with arrayed microholes is characterized in that: two adjacent ones on the movable mold backing plate (6) The distance (L) between the micro cores (4) is ≥0.16mm. 7. The powder microinjection molding mold of the print head ceramic substrate with arrayed microholes according to claim 6, characterized in that: between the two adjacent tiny cores (4) on the fixed template (1) The distance between (K) ≥ 0.16mm. 8. The powder microinjection mold of the print head ceramic substrate with arrayed microholes according to claim 7, characterized in that: the adjacent two tiny cores ( 4) The distance between (H)≥0.16mm.

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