Integrated quantitative micro blood sampling pipette injection molding mold

Abstract

The utility model provides a kind of integral type quantitative micro blood sampling pipette injection moulding mould, belong to mould technical field.It includes upper die plate and lower die plate, the upper die plate and lower die plate between being provided with four pipette forming module, four pipette forming module is rectangular distribution, each pipette forming module includes four pipette forming assembly in straight line arrangement. Through the rectangular distribution four pipette forming module and self-core type thread forming mechanism cooperation, form multi-cavity synchronous forming layout, the corresponding setting of multiple-point injection molding plate and injection molding tube realizes melt accurate distribution, self-core type pipette orifice thread forming mechanism can be reduced mould design and manufacturing cost on the basis that the injection molding formed blood collection tube orifice forms external thread, and self-core design without additional power can avoid power component failure, improve production efficiency.

Description

Technical Field

[0001] This utility model belongs to the field of mold technology and relates to an injection molding mold for an integrated quantitative micro-volume blood collection pipette. Background Technology

[0002] Integrated quantitative micro-volume blood collection pipettes are generally injection molded. During injection molding, external threads need to be formed on the outside of the pipette opening. In existing technologies, the external thread forming mechanism of the mold needs to be separated from the product by mechanical power. The mold design cost is high, and the power supply part is prone to failure during operation, causing downtime and affecting production efficiency.

[0003] To overcome the shortcomings of existing technologies, people have continuously explored and proposed various solutions. For example, Chinese patent discloses a high-precision injection molded blood collection tube mold and injection molding equipment and method [application number: 202411383249.5], which includes a fixed mold and a moving mold. The upper end of the fixed mold is provided with several cavities, and the lower end of the moving mold is fixedly connected with several forming columns. The positions of the forming columns correspond to the forming cavities, and the lower ends of the several sets of forming cavities are movably connected with first push rods. Utility Model Content

[0004] The purpose of this invention is to address the above-mentioned problems by providing an integrated injection molding mold for quantitative micro-volume blood collection pipettes.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] An integrated quantitative micro-volume blood collection pipette injection molding mold includes an upper template and a lower template. Four pipette forming modules are arranged between the upper and lower templates in a rectangular distribution. Each pipette forming module includes four pipette forming components arranged in a straight line. Four self-pulling pipette nozzle thread forming mechanisms corresponding to the pipette forming modules are also provided between the upper and lower templates. A multi-point injection plate is provided on the upper side of the upper template, and several injection tubes corresponding to the pipette forming components are provided at the bottom of the multi-point injection plate.

[0007] In the aforementioned integrated quantitative micro-volume blood collection pipette injection molding mold, the pipette forming component includes an outer mold sleeve, an upper mold cover disposed on the upper side of the outer mold sleeve, and an intermediate insert inserted into the outer mold sleeve from the bottom of the outer mold sleeve. A forming cavity is formed between the upper mold cover, the outer mold sleeve, and the intermediate insert. The self-pulling pipette nozzle thread forming mechanism is disposed on the lower side of the outer mold sleeve.

[0008] In the aforementioned integrated quantitative micro-volume blood collection pipette injection molding mold, the self-pulling pipette nozzle thread forming mechanism includes four annular external thread forming components corresponding to the pipette forming components, and an automatic core-pulling component connected to the four annular external thread forming components.

[0009] In the aforementioned integrated quantitative micro-volume blood collection pipette injection molding mold, the annular external thread forming component includes two semi-annular external thread forming blocks, and the inner circumferential surface of the semi-annular external thread forming blocks is provided with an external thread forming groove.

[0010] In the aforementioned integrated quantitative micro-volume blood collection pipette injection molding mold, the automatic core-pulling assembly includes two parallel core-pulling sliders, the semi-annular external thread forming block is fixedly connected to the core-pulling sliders, and the bottom of the upper template is also provided with an inclined drive rod, which is inserted into the core-pulling slider and slidably connected to the core-pulling slider.

[0011] In the aforementioned integrated quantitative micro-volume blood collection pipette injection molding mold, the lower template is also provided with three limiting blocks with limiting grooves, and the two ends of the core-pulling slider are provided with limiting parts that are inserted into the limiting grooves.

[0012] In the aforementioned integrated quantitative micro-volume blood collection pipette injection molding mold, a surrounding external cooling structure is provided between the upper template, the outer mold sleeve, and the upper mold cover. A bottom plate is also provided on the lower side of the lower template, and an internal cooling structure communicating with the interior of the intermediate insert is provided on the bottom plate.

[0013] In the aforementioned integrated quantitative micro-volume blood collection pipette injection molding mold, the surrounding external cooling structure includes several annular cooling grooves arranged in a ring on the outer wall of the outer mold sleeve and the upper mold cover. The upper template is provided with an upper cooling channel connected to the annular cooling grooves. The upper template is provided with a mold sleeve mounting groove for installing the outer mold sleeve. The upper cooling channel has an opening at the side wall of the mold sleeve mounting groove and the opening is connected to the annular cooling groove.

[0014] In the aforementioned integrated quantitative micro-volume blood collection pipette injection molding mold, the internal cooling structure includes a lower cooling channel set on the base plate, and a vertical internal cooling channel is provided in the middle insert, with the bottom of the vertical internal cooling channel connected to the lower cooling channel.

[0015] In the aforementioned integrated quantitative micro-volume blood collection pipette injection molding mold, the upper side of the upper template is also provided with an injection tube fixing plate, and the injection tube fixing plate is provided with a number of fixing slots that correspond one-to-one with the injection tube.

[0016] Compared with existing technologies, the advantages of this utility model are:

[0017] 1. By combining four rectangularly distributed pipette forming modules with a self-pulling thread forming mechanism, a multi-cavity synchronous forming layout is formed. The corresponding setting of the multi-point injection plate and injection tube enables precise distribution of molten material. The self-pulling pipette tube opening thread forming mechanism can form external threads on the injection-molded blood collection tube opening. The self-pulling design without additional power can reduce mold design and manufacturing costs, avoid power component failures, and improve production efficiency.

[0018] 2. The pipette forming assembly adopts a combination structure of outer mold sleeve, upper mold cover and middle insert to form a closed forming cavity, ensuring accurate forming of the pipette body. The self-pulling thread forming mechanism is set on the lower side of the outer mold sleeve to realize the integrated design of thread forming and body forming, ensuring the coaxiality and positional accuracy of the pipette thread and the pipette body.

[0019] 3. The self-pulling thread forming mechanism achieves automatic core pulling and demolding of the thread through the linkage of the annular external thread forming component and the automatic core pulling component. The four annular external thread forming components are set up in correspondence with the pipette forming component, which can simultaneously complete the forming of multi-port thread, improving the consistency of thread forming and production efficiency.

[0020] Other advantages, objectives and features of this invention will be partly apparent from the following description, and partly understood by those skilled in the art through study and practice of this invention. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the external structure provided by this utility model;

[0022] Figure 2 This is a cross-sectional view of the present invention;

[0023] Figure 3 This is a three-dimensional internal view of the present invention;

[0024] Figure 4 This is a partial structural schematic diagram of the present invention. Detailed Implementation

[0025] like Figures 1-4As shown, 1. An integrated quantitative micro-volume blood collection pipette injection molding mold includes an upper template 1 and a lower template 2. Four pipette forming modules 3 are arranged between the upper template 1 and the lower template 2. The four pipette forming modules 3 are rectangularly distributed. Each pipette forming module 3 includes four pipette forming components 4 arranged in a straight line. Four self-pulling pipette nozzle thread forming mechanisms 5 are also provided between the upper template 1 and the lower template 2, corresponding to the pipette forming modules 3. A multi-point injection plate 6 is provided on the upper side of the upper template 1. Several injection tubes 7 corresponding one-to-one with the pipette forming components 4 are provided at the bottom of the multi-point injection plate 6.

[0026] In this invention, four rectangularly distributed pipette forming modules are combined with a self-pulling thread forming mechanism to form a multi-cavity synchronous forming layout. The corresponding setting of the multi-point injection plate and injection tube enables precise distribution of molten material. The self-pulling pipette tube opening thread forming mechanism 5 can form an external thread on the injection-formed blood collection tube opening. The self-pulling design without additional power can reduce mold design and manufacturing costs, avoid power component failures, and improve production efficiency.

[0027] Specifically, the pipette forming assembly 4 includes an outer mold sleeve 8, an upper mold cover 9 disposed on the upper side of the outer mold sleeve 8, and an intermediate insert 10 inserted into the outer mold sleeve 8 from the bottom. A forming cavity 11 is formed between the upper mold cover 9, the outer mold sleeve 8, and the intermediate insert 10. The self-pulling pipette nozzle thread forming mechanism 5 is disposed on the lower side of the outer mold sleeve 8. The pipette forming assembly adopts a combination structure of the outer mold sleeve, the upper mold cover, and the intermediate insert to form a closed forming cavity, ensuring accurate forming of the pipette body. The self-pulling thread forming mechanism is disposed on the lower side of the outer mold sleeve, realizing the integrated design of thread forming and body forming, ensuring the coaxiality and positional accuracy of the nozzle thread and the pipette body.

[0028] Specifically, the self-pulling pipette nozzle thread forming mechanism 5 includes four annular external thread forming components corresponding to the pipette forming component 4, and an automatic core-pulling component connected to the four annular external thread forming components. The self-pulling thread forming mechanism achieves automatic core-pulling and demolding of the thread through the linkage of the annular external thread forming components and the automatic core-pulling component. The four annular external thread forming components are corresponding to the pipette forming component, enabling simultaneous multi-nozzle thread forming, improving the consistency and production efficiency of thread forming.

[0029] Specifically, the annular external thread forming assembly includes two semi-annular external thread forming blocks 12, each with an external thread forming groove on its inner circumferential surface. The annular external thread forming assembly employs a structure of two semi-annular external thread forming blocks joined together. The external thread forming groove on the inner circumferential surface can precisely form the external thread of the pipette nozzle. The semi-annular design facilitates separation during core pulling, avoiding damage to the product during thread demolding and ensuring the integrity of the thread profile.

[0030] Specifically, the automatic core-pulling assembly includes two parallel core-pulling sliders 13. The semi-annular external thread forming block 12 is fixedly connected to the core-pulling sliders 13. The bottom of the upper mold plate 1 is also provided with an inclined drive rod 14, which is inserted into the core-pulling slider 13 and slidably connected to it. Through the cooperation of the core-pulling sliders and the drive rod, the automatic core-pulling assembly utilizes the movement of the upper mold plate during mold opening to drive the inclined surface of the drive rod to push the slider, thus achieving the lateral core-pulling of the semi-annular block. This structure requires no additional mechanical power, completing the core-pulling process through the mold opening and closing action, reducing the risk of failure, and ensuring a stable and reliable core-pulling process.

[0031] Preferably, the lower template 2 is further provided with three limiting blocks 16 having limiting grooves 15, and the core-pulling slider 13 has limiting parts 17 protruding from both ends and inserted into the limiting grooves 15. The limiting blocks on the lower template cooperate with the limiting parts of the core-pulling slider, constraining the slider's movement trajectory through the limiting grooves, ensuring accurate core-pulling direction, preventing slider offset during core pulling and causing misalignment of the thread forming block, ensuring the accuracy and stability of thread core pulling, and improving the product qualification rate.

[0032] Preferably, a surrounding external cooling structure 18 is provided between the upper mold plate 1, the outer mold sleeve 8, and the upper mold cover 9. A base plate 19 is also provided on the lower side of the lower mold plate 2, and an internal cooling structure 20 communicating with the interior of the intermediate insert 10 is provided on the base plate 19. The surrounding external cooling structure and the internal cooling structure form a dual cooling system. The external cooling structure uniformly cools the forming part of the pipette body, while the internal cooling structure cools the intermediate insert, solving the cooling problem of slender structures. This dual cooling accelerates product curing, reduces deformation and shrinkage, and improves product quality and production efficiency.

[0033] Specifically, the surrounding external cooling structure 18 includes several annular cooling grooves 21 arranged in a ring on the outer walls of the outer mold sleeve 8 and the upper mold cover 9. The upper mold plate 1 is provided with an upper cooling channel 22 connected to the annular cooling grooves 21. The upper mold plate 1 is also provided with a mold sleeve mounting groove for mounting the outer mold sleeve 8. The upper cooling channel 22 has an opening at the side wall of the mold sleeve mounting groove, and this opening communicates with the annular cooling grooves 21. The annular cooling grooves of the surrounding external cooling structure communicate with the upper cooling channel, allowing the cooling medium to flow around the outer walls of the outer mold sleeve and the upper mold cover, achieving uniform cooling of the mold's outer wall. The opening design at the mold sleeve mounting groove ensures effective communication between the cooling medium and the cooling groove, enhancing the cooling effect and ensuring uniform temperature of the forming surface of the pipette body.

[0034] Specifically, the internal cooling structure 20 includes a lower cooling channel 23 disposed on the base plate 19, and a vertical internal cooling channel 24 disposed within the intermediate insert 10, the bottom of which is connected to the lower cooling channel 23. The lower cooling channel of the internal cooling structure is connected to the vertical internal cooling channel within the intermediate insert, allowing the cooling medium to directly reach the molding area inside the pipette and cool the inner wall of the pipette. This design solves the problem of insufficient cooling within slender tube cavities, ensuring uniform cooling of the inner and outer walls, reducing the stress difference between the inner and outer surfaces of the product, and lowering the risk of deformation.

[0035] Specifically, the upper mold plate 1 is also provided with an injection tube fixing plate 25, which has several fixing slots 26 corresponding one-to-one with the injection tubes 7. The injection tube fixing plate on the upper side of the upper mold plate positions the injection tubes through the fixing slots, preventing the injection tubes from shifting or shaking during the injection process, and ensuring that the molten material is accurately injected into the molding cavity along the preset path. This structure ensures uniform distribution of molten material and avoids problems such as uneven filling and missing material in the product caused by the displacement of the injection tube, thereby improving molding accuracy.

[0036] The working principle of this utility model is as follows: by combining four rectangularly distributed pipette forming modules with a self-pulling thread forming mechanism, a multi-cavity synchronous forming layout is formed. The corresponding setting of the multi-point injection plate and injection tube achieves precise distribution of molten material. The self-pulling pipette tube opening thread forming mechanism 5 can form an external thread on the injection-formed blood collection tube opening. The self-pulling design without additional power can reduce mold design and manufacturing costs, avoid power component failure, and improve production efficiency.

[0037] The pipette forming assembly adopts a combination structure of outer mold sleeve, upper mold cover and middle insert to form a closed forming cavity, ensuring accurate forming of the pipette body. The self-pulling thread forming mechanism is set on the lower side of the outer mold sleeve to realize the integrated design of thread forming and body forming, ensuring the coaxiality and positional accuracy of the pipette thread and the pipette body.

[0038] The self-pulling thread forming mechanism achieves automatic core pulling and demolding of threads through the linkage of annular external thread forming components and automatic core pulling components. Four annular external thread forming components are correspondingly set with the pipette forming components, enabling simultaneous multi-pipe thread forming, improving the consistency and production efficiency of thread forming. The annular external thread forming components adopt a structure of two semi-annular external thread forming blocks spliced ​​together. The external thread forming groove on the inner circumferential surface can accurately form the external thread of the pipette nozzle. The semi-annular design facilitates separation during core pulling, avoiding damage to the product during thread demolding and ensuring the integrity of the thread profile. The automatic core pulling component, through the cooperation of the core pulling slider and drive rod, utilizes the movement of the upper mold plate during mold opening to drive the inclined surface of the drive rod to push the slider, achieving lateral core pulling of the semi-annular block. This structure requires no additional mechanical power, completing core pulling through the mold opening and closing action, reducing the risk of failure. The core pulling process is stable and reliable. The limiting block on the lower mold plate cooperates with the limiting part of the core pulling slider, constraining the slider's movement trajectory through the limiting groove, ensuring accurate core pulling direction, preventing slider deviation during core pulling that could cause misalignment of the thread forming block, ensuring the accuracy and stability of thread core pulling, and improving the product qualification rate.

[0039] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

Claims

1. An integrated injection molding mold for a quantitative micro-volume blood collection pipette, comprising an upper template (1) and a lower template (2), characterized in that, Four pipette forming modules (3) are provided between the upper template (1) and the lower template (2). The four pipette forming modules (3) are arranged in a rectangular shape. Each pipette forming module (3) includes four pipette forming components (4) arranged in a straight line. Four self-pulling pipette nozzle thread forming mechanisms (5) corresponding to the pipette forming modules (3) are also provided between the upper template (1) and the lower template (2). A multi-point injection plate (6) is provided on the upper side of the upper template (1). Several injection tubes (7) corresponding to the pipette forming components (4) are provided at the bottom of the multi-point injection plate (6).

2. The injection molding mold for the integrated quantitative micro-volume blood collection pipette according to claim 1, characterized in that, The pipette forming assembly (4) includes an outer mold sleeve (8), an upper mold cover (9) disposed on the upper side of the outer mold sleeve (8), and an intermediate insert (10) inserted into the outer mold sleeve (8) from the bottom of the outer mold sleeve (8). A forming cavity (11) is formed between the upper mold cover (9), the outer mold sleeve (8), and the intermediate insert (10). The self-pulling pipette nozzle thread forming mechanism (5) is disposed on the lower side of the outer mold sleeve (8).

3. The injection molding mold for the integrated quantitative micro-volume blood collection pipette according to claim 2, characterized in that, The self-pulling pipette nozzle thread forming mechanism (5) includes four annular external thread forming components corresponding to the pipette forming component (4) and an automatic core-pulling component connected to the four annular external thread forming components.

4. The injection molding mold for the integrated quantitative micro-volume blood collection pipette according to claim 3, characterized in that, The annular external thread forming assembly includes two semi-annular external thread forming blocks (12), and the inner circumferential surface of the semi-annular external thread forming blocks (12) is provided with an external thread forming groove.

5. The injection molding mold for the integrated quantitative micro-volume blood collection pipette according to claim 4, characterized in that, The automatic core-pulling assembly includes two parallel core-pulling sliders (13), the semi-annular external thread forming block (12) is fixedly connected to the core-pulling sliders (13), and the bottom of the upper template (1) is also provided with an inclined drive rod (14), which is inserted into the core-pulling slider (13) and slidably connected to the core-pulling slider (13).

6. The injection molding mold for the integrated quantitative micro-volume blood collection pipette according to claim 5, characterized in that, The lower template (2) is also provided with three limiting blocks (16) with limiting grooves (15), and the core-pulling slider (13) has limiting parts (17) protruding from both ends and inserted into the limiting grooves (15).

7. The injection molding mold for the integrated quantitative micro-volume blood collection pipette according to claim 6, characterized in that, A surrounding external cooling structure (18) is provided between the upper template (1), the outer mold sleeve (8), and the upper mold cover (9). A bottom plate (19) is also provided on the lower side of the lower template (2). An internal cooling structure (20) communicating with the interior of the middle insert (10) is provided on the bottom plate (19).

8. The injection molding mold for the integrated quantitative micro-volume blood collection pipette according to claim 7, characterized in that, The surrounding external cooling structure (18) includes several annular cooling grooves (21) arranged in a ring on the outer sidewall of the outer mold sleeve (8) and the upper mold cover (9). The upper template (1) is provided with an upper cooling channel (22) connected to the annular cooling groove (21). The upper template (1) is provided with a mold sleeve mounting groove for installing the outer mold sleeve (8). The upper cooling channel (22) has an opening at the sidewall of the mold sleeve mounting groove and the opening is connected to the annular cooling groove (21).

9. The injection molding mold for the integrated quantitative micro-volume blood collection pipette according to claim 8, characterized in that, The internal cooling structure (20) includes a lower cooling channel (23) disposed on the base plate (19), and a vertical internal cooling channel (24) disposed in the middle insert (10), the bottom of which is connected to the lower cooling channel (23).

10. The injection molding mold for the integrated quantitative micro-volume blood collection pipette according to claim 9, characterized in that, The upper template (1) is also provided with an injection tube fixing plate (25), and the injection tube fixing plate (25) is provided with a number of fixing slots (26) corresponding to the injection tube (7).

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