CN103612389B - Pipette produces special equipment and production technology - Google Patents

Pipette produces special equipment and production technology Download PDF

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Publication number
CN103612389B
CN103612389B CN201310516294.9A CN201310516294A CN103612389B CN 103612389 B CN103612389 B CN 103612389B CN 201310516294 A CN201310516294 A CN 201310516294A CN 103612389 B CN103612389 B CN 103612389B
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CN
China
Prior art keywords
cylinder
pipette
lifted
welding
moving mass
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CN201310516294.9A
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Chinese (zh)
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CN103612389A (en
Inventor
陈志勇
富永福
周邦传
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浙江立博生物技术有限公司
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Priority to CN201310516294.9A priority Critical patent/CN103612389B/en
Publication of CN103612389A publication Critical patent/CN103612389A/en
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Publication of CN103612389B publication Critical patent/CN103612389B/en

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Abstract

The present invention relates to pipette production equipment field, especially disclose a kind of high degree of automation, production efficiency pipette production special equipment high, it includes screen printing device and packing device, it is also made up of body extrusion molding apparatus, ultrasonic welding device, leak-checking apparatus and plug cotton core device, and its production technology is:The first step, dispensing extrusion molding;Second step, tube head, ozzle welding;3rd step, leaks hunting;4th step:Plug cotton core;5th step:Scale prints;6th step:Packaging, the pipette production special equipment and production technology, it passes through fully-automatic equipment carries out the working process in each stage to pipette, realize the automated production of pipette, the input of manual labor is greatly reduced, production cost is reduced, while can be with improve production efficiency.

Description

Pipette produces special equipment and production technology

Technical field

The present invention relates to pipette production equipment field, especially a kind of pipette production special equipment and production technology.

Background technology

Existing pipette production equipment, it is mostly fed using artificial feeding, and automaticity is low, low production efficiency Under, while in by artificial operating process, easily impurity or dirt are stained with the surface or inside to pipette, influence pipette Quality.

The content of the invention

A kind of high degree of automation is provided the invention aims to solve the deficiency of above-mentioned technology, production efficiency is high Pipette production special equipment and production technology.

In order to achieve the above object, the pipette production special equipment designed by the present invention, it includes screen printing device and bag Assembling device, it is also made up of body extrusion molding apparatus, ultrasonic welding device, leak-checking apparatus and plug cotton core device.

The structure of described body extrusion molding apparatus is:It includes hopper, heater, extrusion device, cooling device, leads Leading-in device and cutter sweep, hopper are connected on the heaters, and heater is connected with extrusion device, and cooling dress is set after extrusion device Put, draw-gear and cutter sweep are sequentially provided with after cooling device, be provided with very in cooling device and near this end of extrusion device Empty device, is provided with caliber detection means between cooling device and draw-gear;It is evenly spaced on described vacuum plant to set There are four vacuum leads;Described caliber detection means is length monitoring device, while the position of draw-gear is higher than cooling The position of device, the setting that the device passes through vacuum plant can effectively ensure the circularity of body, so as to improve the matter of pipette Amount, additionally by the caliber detection means for setting, is capable of achieving the internal diameter real-time monitoring to body, it is to avoid pipe diameter size differs, shadow Ring its quality.

The structure of described ultrasonic welding device is:It includes welding stand, and feeding dress is provided with the side of welding stand Put, one group of material chain is provided with the centre of welding stand, tube head welding mechanism is respectively equipped with before and after welding stand With ozzle welding mechanism, tube head welding mechanism is identical with the structure of ozzle welding mechanism, and is symmetrical arranged;Tube head welding mechanism Structure is:It is respectively equipped with the outside welding stand of material chain and device is lifted on material, the upper of device is lifted on material End is provided with grip block, and lift device correspondence position is provided with and takes blame for others on the side of welding stand with material, in the another of welding stand Side is provided with rotation cylinder with lift device correspondence position on material, and pneumatic cleft hand is provided with rotation cylinder, and rotation cylinder can make gas Pawl hand is moved back and forth in horizontality and vertical state, and motion is provided with below the pneumatic cleft hand top under horizontality Block, slide rail is provided with moving mass lower end, and arc opening is provided with pneumatic cleft hand top correspondence position on moving mass, is opened in arc Mouthful be arranged right below top gas cylinder, ultrasonic welder is provided with the outside of moving mass, be connected with ultrasonic welder reciprocal Cylinder, vibrating disc is provided with reciprocating air cylinder side, and vibrating disc is connected at moving mass by delivery track;Device is lifted on material When rising to highest point, the tube head center when center of pipette clamps tube head in vertical state with pneumatic cleft hand is corresponding, together When height also with ultrasonic welder it is corresponding;Dividing plate, dividing plate and motion are provided with and pneumatic cleft hand between at the top of delivery track Block is fitted, and baffle plate is provided near delivery track side in moving mass, and baffle plate is fitted with dividing plate, and the length of baffle plate is more than delivery track Ultimate range between moving mass, on material lift device top surface be arranged with two projections, between two projections in The heart aligns with the depression of material transmission chain, and the device can be such that tube head, ozzle is docked with body accurately, and welding efficiency is high, protects Card welding quality, while realizing fully-automatic production, improve production efficiency reduces artificial input, it is possible to decrease production cost.

The structure of described leak-checking apparatus is:It includes frame of leaking hunting, and feeding device is provided with the one end for frame of leaking hunting, The centre of frame of leaking hunting is provided with one group of material transmission toothed chain, is provided with the outside of material transmission toothed chain and device is lifted on material, and thing The position that device is lifted on material conveys toothed chain less than material, and device is lifted on material relative can pump with frame of leaking hunting, On material lift device above be provided with grip block, with material on lift device rise to highest when opposite position both sides distinguish Top board is provided with, the top board of wherein side is fixed on fore-set cylinder, and fore-set cylinder is arranged on and leaks hunting in frame, the top of opposite side Plate is fixed on slide rail by contiguous block, and slide rail is fixed on and leaks hunting in frame, and the direction of motion and top of the contiguous block on slide rail The telescopic direction of post cylinder is vertical with material conveying toothed chain, contiguous block and the push rod for being fixed on the reciprocating air cylinder leaked hunting in frame Connection, the telescopic direction of reciprocating air cylinder is consistent with the direction of motion of contiguous block, with material conveying toothed chain on the top board of both sides Concave tooth correspondence position is arranged with multigroup seal washer, the seal washer center on the side plate being connected with fore-set cylinder be provided with into Feed channel, is provided with linking arm on contiguous block, and number and seal washer group number identical jaw, each gas are provided with the connecting arm Pawl is located between one group of seal washer, substandard products collecting box is provided with the Shelf External that leaks hunting relative to contiguous block side, in material The top surface of upper lift device is provided with one group of projection relative to the both sides at the center of each seal washer.;It passes through the sealing on top board Cooperation between packing ring, and the air pressure of admission line is supplied and monitored, and realizes the detection to the air-tightness of pipette, while detection When going out substandard product, substandard product is captured by jaw and drives jaw to move to substandard products collecting box using reciprocating air cylinder Place, by substandard products input substandard products collecting box, realizes sorting, it is to avoid obscure, so that the accuracy of detection is improved, while can be disposable The even many pipettes of detection two, greatly improve the production efficiency of pipette, reduce production cost, are conducive to improving economic effect Benefit.

The structure of described plug cotton core device is:It includes plug core machine frame, and feeding device is provided with one end of plug core machine frame, Centre on plug core machine frame is provided with one group of material transmission chain, is provided with the outside of material transmission chain and device is lifted on material, The upper end that device is lifted on material is provided with grip block, device correspondence position is lifted on the side of plug core machine frame and material and is provided with top Cylinder, locating piece is provided with opposite side and the lift device correspondence position on material of plug core machine frame, and the center of locating piece is provided with location hole, Correspondence position is provided with moving mass outside locating piece, and moving mass center is provided with through hole, and moving mass bottom is provided with slide rail, in moving mass It is outside to be provided with cylinder fixed seat with locating piece correspondence position, it is provided with cylinder in cylinder fixed seat, it is cylinder external part, through hole, fixed Position and is taken blame for others in sustained height at hole, and with material on lift the center alignment of pipette when device is in extreme higher position, in cylinder Side is provided with vibrating disc, and vibrating disc is connected at moving mass by delivery track;The top surface that device is lifted on material is arranged with Alignd with the depression of material transmission chain at two projections, the center between two projections;It realizes fully automatic feeding, conveying, plug The steps such as core, reduce artificial operation, improve production efficiency, and product quality can be made to be guaranteed, and reduce production cost.

Raw material is passed through body extrusion molding apparatus extrusion molding by pipette production technology, the first step, dispensing extrusion molding After cut;Second step, tube head, ozzle welding, body both sides are respectively welded at by ultrasonic welding device by tube head, ozzle;The Three steps, are leaked hunting, and air-leakage test is carried out to pipette by leak-checking apparatus;4th step:Plug cotton core, by filling in cotton core device in pipe Head is internal to fill in cotton core;5th step:Scale is printed, and scale printing is carried out to tube surfaces by screen printing device;6th step:Bag Dress, independent packaging is carried out by packing device to pipette.

Pipette production special equipment and production technology obtained by the present invention, it passes through fully-automatic equipment and pipette is entered The working process in each stage of row, realizes the automated production of pipette, greatly reduces the input of manual labor, reduces life Cost is produced, while can be with improve production efficiency.

Brief description of the drawings

Fig. 1 is Structure and Process schematic diagram of the invention;

Fig. 2 is the structural representation of body extrusion molding apparatus of the invention;

Fig. 3 is the structural representation of ultrasonic welding device of the invention;

Fig. 4 is the close-up schematic view of ultrasonic welding device of the invention;

Fig. 5 is the structural representation of leak-checking apparatus of the invention;

Fig. 6 is the structural representation of plug cotton core device of the invention.

Specific embodiment

Below by embodiment combination accompanying drawing, the invention will be further described.

Embodiment 1:

As shown in figure 1, the pipette production special equipment of the present embodiment description, it includes screen printing device 5 and packing device 6, it is also made up of body extrusion molding apparatus 1, ultrasonic welding device 2, leak-checking apparatus 3 and plug cotton core device 4;As shown in Fig. 2 The structure of described body extrusion molding apparatus 1 is:It include hopper 11, heater 12, extrusion device 13, cooling device 14, Draw-gear 15 and cutter sweep 16, hopper 11 are connected on heater 12, and heater 12 is connected with extrusion device 13, extrusion dress Cooling device 14 is set after putting 13, draw-gear 15 and cutter sweep 16 is sequentially provided with after cooling device 14, in cooling device 14 Interior and close this end of extrusion device 13 is provided with vacuum plant 18, and caliber detection is provided between cooling device 14 and draw-gear 15 Device 17, it is evenly spaced on described vacuum plant 18 to be provided with four vacuum leads 19, described caliber detection means 17 It is length monitoring device, while position of the position of draw-gear 15 higher than cooling device 14;As shown in Figure 3, Figure 4, it is described The structure of ultrasonic welding device 2 is:It includes welding stand 22, and feeding device 21 is provided with the side of welding stand 22, in weldering The pick centre of frame 22 is provided with one group of material chain 219, and tube head welding mechanism is respectively equipped with before and after welding stand 22 With ozzle welding mechanism, tube head welding mechanism is identical with the structure of ozzle welding mechanism, and is symmetrical arranged;Tube head welding mechanism Structure is:Lift device 23 on material is respectively equipped with the outside welding stand 22 of material chain 219, dress is lifted on material The upper end for putting 23 is provided with grip block 24, the correspondence position of device 23 is lifted on the side of welding stand 22 and material is provided with and take blame for others 25, Rotation cylinder 26 is provided with the lift correspondence position of device 23 on material in the opposite side of welding stand 22, is provided with rotation cylinder 26 Pneumatic cleft hand 27, rotation cylinder 26 can be such that pneumatic cleft hand 27 is moved back and forth in horizontality and vertical state, under horizontality The top of pneumatic cleft hand 27 below be provided with moving mass 28, slide rail 29 is provided with the lower end of moving mass 28, with gas on moving mass 28 The top correspondence position of pawl hand 27 is provided with arc opening 210, and top gas cylinder 211 is arranged right below in arc opening 210, in fortune The outside of motion block 28 is provided with ultrasonic welder 212, reciprocating air cylinder 213 is connected with ultrasonic welder 212, in reciprocating air cylinder 213 sides are provided with vibrating disc 214, and vibrating disc 214 is connected at moving mass 28 by delivery track 215;Device is lifted on material 23 when rising to highest point, and the center of pipette is in the tube head center pair during vertical state with the clamping tube head of pneumatic cleft hand 27 Should, while the height also with ultrasonic welder 212 is corresponding, be provided with and pneumatic cleft hand 27 between at the top of delivery track 215 every Plate 216, dividing plate 216 is fitted with moving mass 28, and baffle plate 217, baffle plate 217 are provided near the side of delivery track 215 in moving mass 28 Fitted with dividing plate 216, the length of baffle plate 217 is lifted more than the ultimate range between delivery track 215 and moving mass 28 on material The top surface of device 23 is arranged with two projections 218, the depression of the center between two projections 218 and material transmission chain 219 Alignment;As shown in figure 5, the structure of described leak-checking apparatus 3 is:It includes frame 32 of leaking hunting, and is set in the one end for frame 32 of leaking hunting There is feeding device 31, one group of material transmission toothed chain 33 is provided with the centre of frame 32 of leaking hunting, the outside of toothed chain 33 is transmitted in material Lift device 34 on material is provided with, and the position of device 34 is lifted on material and convey toothed chain 33 less than material, lifting device 34 on material can Relative to be pumped with frame 32 of leaking hunting, the top that device 34 is lifted on material is provided with grip block 35, with material on lift Opposite position is respectively provided on two sides with top board 36 when device 34 rises to highest, and the top board 36 of wherein side is fixed on fore-set gas On cylinder 311, and fore-set cylinder 311 is arranged on and leaks hunting in frame 32, and the top board 36 of opposite side is fixed on slide rail by contiguous block 312 On 313, slide rail 313 is fixed on and leaks hunting in frame 32, and the direction of motion and fore-set cylinder 311 of the contiguous block 312 on slide rail 313 Telescopic direction with material conveying toothed chain 33 it is vertical, contiguous block 312 be fixed on the reciprocating air cylinder 316 leaked hunting in frame 32 Push rod is connected, and the telescopic direction of reciprocating air cylinder 316 is consistent with the direction of motion of contiguous block 312, with thing on the top board 36 of both sides The concave tooth correspondence position of material conveying toothed chain 33 is arranged with multigroup seal washer 37, on the side plate being connected with fore-set cylinder 311 The center of seal washer 37 be provided with admission line 38, linking arm 314 is provided with contiguous block 312, be provided with linking arm 314 Number and 37 groups of number identical jaws 315 of seal washer, each jaw 315 are located between one group of seal washer 37, relative to even Connect and substandard products collecting box 39 is provided with outside the frame 32 of leaking hunting of the side of block 312, the group number of seal washer 37 is preferably 32 groups;In material The both sides at the center of the top surface relative to each seal washer 37 of upper lift device 34 are provided with one group of projection 310.As shown in fig. 6, institute The structure of the plug cotton core device 4 stated is:It includes plug core machine frame 42, and feeding device 41 is provided with one end of plug core machine frame 42, Centre on plug core machine frame 42 is provided with one group of material transmission chain 43, is provided with the outside of material transmission chain 43 and dress is lifted on material 44 are put, the upper end that device 44 is lifted on material is provided with grip block 46,44 pairs, device is lifted on the side of plug core machine frame 42 and material Answer position to be provided with and take blame for others 45, lifting the correspondence position of device 44 on opposite side and the material of plug core machine frame 42 is provided with locating piece 47, fixed The center of position block 47 is provided with location hole 415, and moving mass 48 is provided with the outside correspondence position of locating piece 47, and the center of moving mass 48 is provided with Through hole 414, the bottom of moving mass 48 is provided with slide rail 49, and cylinder fixed seat is provided with the correspondence position of locating piece 47 in the outside of moving mass 48 410, it is provided with cylinder 411 in cylinder fixed seat 410, the external part of cylinder 411, through hole 414, location hole 415 and taking blame for others 45 is in Sustained height, and with material on lift device 44 be in extreme higher position when pipette center alignment, be provided with shake in the side of cylinder 411 Moving plate 412, vibrating disc 412 is connected at moving mass 48 by delivery track 413;The top surface that device 44 is lifted on material symmetrically sets There are two projections 416, the center between two projections 416 is alignd with the depression of material transmission chain 43.

By body extrusion molding apparatus 1 be extruded into raw material by pipette production technology, the first step, dispensing extrusion molding Cut after type;Second step, tube head, ozzle welding, body both sides are respectively welded at by ultrasonic welding device 2 by tube head, ozzle; 3rd step, is leaked hunting, and air-leakage test is carried out to pipette by leak-checking apparatus 3;4th step:Plug cotton core, by filling in cotton core device 4 Cotton core is filled in inside tube head;5th step:Scale is printed, and scale printing is carried out to tube surfaces by screen printing device 5;6th Step:Packaging, independent packaging is carried out by packing device 6 to pipette.

Claims (4)

1. a kind of pipette produces special equipment, and it includes screen printing device and packing device, it is characterized in that:It is also extruded by body Shaped device, ultrasonic welding device, leak-checking apparatus and plug cotton core device composition;The structure of wherein described ultrasonic welding device For:It includes welding stand, and feeding device is provided with the side of welding stand, and it is defeated to be provided with one group of material in the centre of welding stand Chain is sent, tube head welding mechanism and ozzle welding mechanism, tube head welding mechanism and ozzle are respectively equipped with before and after welding stand The structure of welding mechanism is identical, and is symmetrical arranged;The structure of tube head welding mechanism is:In the outside bonding machine of material chain It is respectively equipped with frame and device is lifted on material, the upper end that device is lifted on material is provided with grip block, in the side of welding stand and thing Lift device correspondence position is provided with and takes blame for others on material, and rotation gas is provided with opposite side and the lift device correspondence position on material of welding stand Cylinder, is provided with pneumatic cleft hand in rotation cylinder, and rotation cylinder can be such that pneumatic cleft hand is moved back and forth in horizontality and vertical state, Be provided with moving mass below pneumatic cleft hand top under horizontality, slide rail be provided with moving mass lower end, on moving mass with Pneumatic cleft hand top correspondence position is provided with arc opening, and top gas cylinder is arranged right below in arc opening, in the outer of moving mass Side is provided with ultrasonic welder, and reciprocating air cylinder is connected with ultrasonic welder, and vibrating disc, vibrating disc are provided with reciprocating air cylinder side It is connected at moving mass by delivery track;Device is lifted on material when rising to highest point, the center of pipette and pneumatic pawl Hand clamping tube head is in tube head center correspondence during vertical state, while the height also with ultrasonic welder is corresponding;In conveyor track Dividing plate is provided between road top and pneumatic cleft hand, dividing plate is fitted with moving mass, is provided near delivery track side in moving mass Baffle plate, baffle plate is fitted with dividing plate, and the length of baffle plate lifts dress more than the ultimate range between delivery track and moving mass on material The top surface put is arranged with two projections, and the center between two projections is alignd with the depression of material transmission chain.
2. a kind of pipette according to claim 1 produces special equipment, it is characterized in that:Described body extrusion molding dress The structure put is:It includes hopper, heater, extrusion device, cooling device, draw-gear and cutter sweep, and hopper is connected to On heater, heater is connected with extrusion device, and cooling device is set after extrusion device, and traction dress is sequentially provided with after cooling device Put and cutter sweep, vacuum plant is provided with cooling device and near this end of extrusion device, in cooling device and draw-gear Between be provided with caliber detection means;It is evenly spaced on described vacuum plant to be provided with four vacuum leads;Described caliber Detection means is length monitoring device, while position of the position of draw-gear higher than cooling device.
3. a kind of pipette according to claim 1 produces special equipment, it is characterized in that:The structure of described leak-checking apparatus For:It includes frame of leaking hunting, and feeding device is provided with the one end for frame of leaking hunting, and being provided with one group of material in the centre of frame of leaking hunting passes Toothed chain is sent, is provided with the outside of material transmission toothed chain and the position that device is lifted on device, and material is lifted on material less than material conveying Toothed chain, device is lifted on material relative can pump with frame of leaking hunting, and is lifted on material above device and is provided with grip block, With material on lift opposite position when device rises to highest and be respectively provided on two sides with top board, the top board of wherein side is fixed on On fore-set cylinder, and fore-set cylinder is arranged on and leaks hunting in frame, and the top board of opposite side is fixed on slide rail by contiguous block, slide rail It is fixed on and leaks hunting in frame, and the telescopic direction of the direction of motion and fore-set cylinder of the contiguous block on slide rail conveys tooth with material Chain is vertical, and contiguous block is connected with the push rod for being fixed on the reciprocating air cylinder leaked hunting in frame, the telescopic direction of reciprocating air cylinder be connected The direction of motion of block is consistent, and the concave tooth correspondence position with material conveying toothed chain on the top board of both sides is arranged with multigroup sealing gasket Circle, the seal washer center on the side plate being connected with fore-set cylinder is provided with admission line, linking arm is provided with contiguous block, Linking arm is provided with number and seal washer group number identical jaw, and each jaw is located between one group of seal washer, relative The Shelf External that leaks hunting in contiguous block side is provided with substandard products collecting box, and the top surface of device is lifted on material relative to each sealing gasket The both sides at the center of circle are provided with one group of projection.
4. a kind of pipette according to claim 1 produces special equipment, it is characterized in that:The knot of described plug cotton core device Structure is:It includes plug core machine frame, and feeding device is provided with one end of plug core machine frame, and the centre on plug core machine frame is provided with one group of thing Material transmission chain, is provided with the outside of material transmission chain and device is lifted on material, and the upper end that device is lifted on material is provided with clamping Plate, lift device correspondence position is provided with and takes blame for others on the side of plug core machine frame with material, on the opposite side and material of plug core machine frame Lift device correspondence position is provided with locating piece, and the center of locating piece is provided with location hole, and correspondence position is provided with motion outside locating piece Block, moving mass center is provided with through hole, and moving mass bottom is provided with slide rail, and cylinder is provided with locating piece correspondence position outside moving mass Fixed seat, is provided with cylinder in cylinder fixed seat, cylinder external part, through hole, location hole and takes blame for others in sustained height, and and thing The center alignment of pipette when device is in extreme higher position is lifted on material, vibrating disc is provided with cylinder side, vibrating disc is by conveying Track is connected at moving mass;On material lift device top surface be arranged with two projections, the center between two projections with The depression alignment of material transmission chain.
CN201310516294.9A 2013-10-28 2013-10-28 Pipette produces special equipment and production technology CN103612389B (en)

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CN201310516294.9A CN103612389B (en) 2013-10-28 2013-10-28 Pipette produces special equipment and production technology

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Application Number Priority Date Filing Date Title
CN201310516294.9A CN103612389B (en) 2013-10-28 2013-10-28 Pipette produces special equipment and production technology

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CN103612389A CN103612389A (en) 2014-03-05
CN103612389B true CN103612389B (en) 2017-06-06

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Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104174447B (en) * 2014-08-14 2015-10-28 浙江硕华医用塑料有限公司 A kind of pipette and production technology thereof
CN104177718B (en) * 2014-08-14 2017-03-22 浙江硕华医用塑料有限公司 Pipette and integral forming technique thereof
CN108819261B (en) * 2018-05-30 2020-04-24 浙江硕华生命科学研究股份有限公司 Efficient welding equipment for serological pipette
CN108500714B (en) * 2018-05-30 2020-04-24 浙江硕华生命科学研究股份有限公司 Full-automatic ultrasonic welding equipment for serological pipette
CN108672915B (en) * 2018-05-30 2020-04-24 浙江硕华生命科学研究股份有限公司 Full-automatic ultrasonic welding mechanism of serum pipette
CN108422255B (en) * 2018-05-30 2020-01-14 浙江硕华生命科学研究股份有限公司 Full-automatic ultrasonic welding system for serum pipette
CN108790187B (en) * 2018-05-30 2020-04-24 浙江硕华生命科学研究股份有限公司 Full-automatic ultrasonic welding device for serum pipette
CN108637452B (en) * 2018-05-30 2020-04-24 浙江硕华生命科学研究股份有限公司 Serum pipette ultrasonic welding mechanism

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Publication number Priority date Publication date Assignee Title
CN201645830U (en) * 2009-10-19 2010-11-24 袁建华 Fully automatic ultrasonic welding equipment for pipette
CN202037848U (en) * 2011-03-31 2011-11-16 袁建华 Extruder for pipette
CN102847568A (en) * 2012-08-27 2013-01-02 浙江硕华医用塑料有限公司 Disposable pipette with plug core

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201645830U (en) * 2009-10-19 2010-11-24 袁建华 Fully automatic ultrasonic welding equipment for pipette
CN202037848U (en) * 2011-03-31 2011-11-16 袁建华 Extruder for pipette
CN102847568A (en) * 2012-08-27 2013-01-02 浙江硕华医用塑料有限公司 Disposable pipette with plug core

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