CN109509946A - A kind of mounting screw linking cavity body filter - Google Patents

A kind of mounting screw linking cavity body filter Download PDF

Info

Publication number
CN109509946A
CN109509946A CN201811480088.6A CN201811480088A CN109509946A CN 109509946 A CN109509946 A CN 109509946A CN 201811480088 A CN201811480088 A CN 201811480088A CN 109509946 A CN109509946 A CN 109509946A
Authority
CN
China
Prior art keywords
cavity
resonance piece
mounting screw
contact pin
cover board
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201811480088.6A
Other languages
Chinese (zh)
Inventor
方锋明
彭蛟
成钢
高小鹏
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Tongyu Communication Inc
Original Assignee
Tongyu Communication Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Tongyu Communication Inc filed Critical Tongyu Communication Inc
Priority to CN201811480088.6A priority Critical patent/CN109509946A/en
Publication of CN109509946A publication Critical patent/CN109509946A/en
Pending legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01PWAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P1/00Auxiliary devices
    • H01P1/20Frequency-selective devices, e.g. filters
    • H01P1/207Hollow waveguide filters
    • H01P1/208Cascaded cavities; Cascaded resonators inside a hollow waveguide structure

Abstract

A kind of mounting screw linking cavity body filter, cavity and seal cover board including die cast open at one end, several interval settings and resonance piece interconnected are fixed on seal cover board, resonance piece and seal cover board are integrated die cast structure, the contact pin mounting hole of a pair of of through cavities side wall is offered on the one of lateral wall of cavity, contact pin medium is arranged in contact pin mounting hole, mounting screw is equipped in contact pin medium, mounting screw one end is located at containment portion in order to connect with antenna, and mounting screw is twisted through one end of resonance piece and is located on resonance piece.What the present invention changed conventional filter splits mode, it is left and right side core-pulling structure by the improvement of vertical folding separation structure, resonance piece and cover board integrated design, simplify the structures such as the boss for needing to weld in resonance piece installation process, reduce inner body quantity, optimize assembling mode, improves production efficiency, the application eliminates traditional welding form simultaneously, may be implemented to reuse using mounting screw.

Description

A kind of mounting screw linking cavity body filter
Technical field
The present invention relates to a kind of microwave and millimeter wave communications fields, filter more particularly, to a kind of mounting screw linking cavity Device.
Background technique
Filter is a kind of typical frequency selection device, it can effectively inhibit garbage signal, prevent it from passing through Filter, only useful signal pass through filter, and therefore, the superiority and inferiority of performance of filter directly influences entire communication system Quality, be modern microwave, vital device in millimeter-wave communication system.
Cavity body filter is a kind of very important filter, compared with the filter of other properties, sound construction, and performance Reliable and stable, small in size, Q value is moderate, and high side parasitic passband farther out and perfect heat-dissipating, can be used for relatively high power and frequency.
The first scheme-cavity body filter, coupled structure generally use rod-shaped resonant rod, and corresponding coupling adjusts dress It installs in the side of resonant rod, regulator for coupling generallys use metal and flies bar, or flies bar rear and front end in metal and increase Fly bar disk, to realize the coupling with resonant rod.
However this regulator for coupling is only applicable to the coupling with rod-shaped resonant rod.As modern communications field front end is set Standby to have more more and more urgent demand to the miniaturization of the components such as duplexer, combiner, filter, the duplexer of miniaturization closes When resonant rod used by the components such as road device, filter is no longer rod-shaped resonant rod, it is some miniaturization, high request product pair Stiffness of coupling requirement is higher, and the even summation intensity adjustable extent of traditional regulator for coupling is small, is also no longer applicable in.
The adjustable coupled structure of second scheme-cavity body filter, including two end resonant cavities, two ends are humorous Several middle resonant cavities are provided between vibration chamber, two end resonant cavities and several middle resonant cavities are along straight uniform point Cloth, there are gap between middle resonant cavity and end resonant cavity between two adjacent middle resonant cavities, in each gap One adjusting screw of up and down setting, middle resonant cavity are fixedly connected with horizontal-extending first resonance piece, end resonance Chamber is fixedly connected with horizontal-extending second resonance piece, and between the first resonance piece and the second resonance piece or any two first are humorous It is connected between vibration piece by coupling piece.
Since filter is to miniaturization, lightweight develops, to reach compared with high electrical property index and consistency of performance, to production Product size, Geometrical Tolerance Principle are higher and higher.Common production technology be aluminium alloy compression casting molding again machine add to dimensional tolerance and The high region of Geometrical Tolerance Principle.
Die casting is by liquid or semi-solid-state metal under high pressure effect, and it is intracavitary to be pressed into precision machined die cast metal type, is made It is filled up completely type chamber, clear-cut to obtain, and any surface finish is consistent with die casting cavity dimension, the workpiece that can be interchanged.Die casting It is to develop faster one in a kind of production efficiency and the relatively high heat processing technique and modern mechanical manufacturing of mechanization degree The few chip of kind, the process of chipless.
Product is heated from the solid process of solid-liquid-during Die Casting.Product structure design, mold design, pressure Cast tool parameters, the factors such as product stress release, all can to make shaped article actual size and ideal dimensions generation deviation, product Surface roughness flatness is poor, the bad phenomenons such as whole deformation.To meet product miniaturization and consistency of performance demand, usually It needs to process a large amount of fitting surface and functional surfaces with numerically-controlled machine tool, increases huge product processing cost.
Because product outline size is compact, inner space very little, (such as resonance piece flies bar piece to filter internal structure part, flies Bar line) assembling it is extremely difficult, increase a large amount of built-up time costs.
Such as shown in attached drawing 1- Fig. 6, a kind of traditional resonator, main includes made of a platinum open at one end Traditional cavity 6 and conventional resonance piece 4, traditional cavity 6 are generally adopted by using 1 place face of adjusting screw as open end, in use Lower unpack format, and traditional resonance piece 4 is separate part, needs to be welded on traditional 6 inner wall of cavity, in traditional cavity 6 Be provided with several spaced traditional diameter items, wherein one end of traditional diameter item is implanted into 6 inner wall of traditional cavity, traditional diameter item it is another One end and traditional 6 inner wall interval of cavity are arranged, and traditional 6 inner cavity of cavity is divided into several phases by spaced traditional diameter item Intercommunicated chamber, conventional resonance piece 4 are vacantly arranged in the intracorporal chamber of traditional chamber and are welded on far from diameter item implantation end On the tradition cavity inner wall of side, the welding boss of support resonance piece is provided on traditional 6 inner wall of cavity, on traditional cavity hatch end Conventional cover plate 2 made of platinum are covered with, resonance piece is sealed in the cavity by conventional cover plate 2 and traditional cooperation of cavity 6, is passed System cover board 2 is provided with several adjusting screws 1 being linearly spaced apart on one end of diameter item implantation cavity inner wall, Projection of the adjusting screw 1 on traditional cavity is located on the indoor conventional resonance piece 4 of chamber that diameter item separates, and traditional cavity 6 is remote It is opened up on one end end face from conventional cover plate 2 there are two through-hole, is equipped with contact pin 7 in through-hole, it is intracorporal that contact pin 7 is inserted into traditional chamber One end is through conventional resonance piece and is welded on conventional resonance piece 4, and contact pin medium 5 is filled in through-hole, and contact pin is situated between by contact pin Matter 5 is fixed in the through-hole of traditional cavity 6, and the winged pole socket 9 of tradition is fixed on diameter item, and the tradition of two neighboring diameter item flies pole socket 9 On winged bar piece 3 is installed, the winged pole socket 9 of tradition is using winged bar piece 3 is clamped in the form of the seat of honour and the cooperation of lower seat, close to diameter item and biography System cavity inner wall interval, which is arranged between the resonance piece of one end and cavity bottom, is provided with the winged bar line 8 of tradition and the winged bar wire bonding of tradition On conventional resonance piece 4, the winged bar line 8 of tradition is usually to be vertically welded on conventional resonance piece 4.
Traditional this filter of chamber uses vertical folding separation structure.
When production and assembly:
1, first winged bar line 8 is welded on the pad of conventional resonance piece 4, it is convex that conventional resonance piece 4 is then welded on cavity side On platform.Conventional resonance piece 4 and traditional cavity welding are long cantilever structure, the reliability of welding, the direct shadow of flatness after one Ring filter working frequency.
2, by the winged pole socket lower half portion insertion cavity guide groove of tradition, winged bar piece is placed into, the winged pole socket upper half of tradition is covered Part.
3, contact pin is inserted into contact pin medium holes, is then inserted into cavity bottom limit limit, contact pin and resonance piece is welded It connects and combines.
4, cover board, which screws in, adjusts spiral shell screw, paints tin cream in cover board bottom surface, seals with cavity, is incorporated in by high temperature reflux weldering Together.
Due to inside cavity narrow space, assembly welding precision is difficult to ensure, performance of filter will unanimously be not being met.
It is cavity mold-opening structure figure as shown in Fig. 5 and Fig. 6.Generally require design 10 He of die ejector pin boss on mold again It is grounded capillary boss 12, while needing to process cover board soldering and sealing face 11,1 is to reach the dimensional accuracy being consistent with design requirement, is opened Module would generally reserve the machining allowance of key position, after product depanning, then be added by numerical controlled machine-tool, will increase production at This.When especially when mass production, bottleneck is often delivered.Traditional cavity die sinking need to reserve the machining allowance of key position, such as push up Needle position need to protrude about 0.3mm, then add mill off by subsequent machine.For example capillary boss is grounded since diameter is too thin, overstriking need to be opened again Machine adds the size for milling out needs, and cover board soldering and sealing face needs machine to add guarantee flatness due to planarity requirements height.
Summary of the invention
It is unreasonable the purpose of the present invention is being designed for the existing filter construction of solution, cause production efficiency low, and due to Technique limits the problem for causing performance of filter inconsistent, provides a kind of mounting screw linking cavity body filter.
The deficiency of the present invention to solve above-mentioned technical problem, used technical solution is:
A kind of mounting screw linking cavity body filter, cavity and seal cover board including die cast open at one end, sealing Several interval settings and resonance piece interconnected are fixed on cover board, it is characterised in that: the resonance piece and seal cover board It is integrated die cast structure, cavity inner cavity is divided into several interconnected resonant cavities by diameter item, and wherein the one of cavity Several adjusting screws for being used to adjust filter parameter are provided on a lateral wall, wherein one end through cavities of adjusting screw Side wall simultaneously protrudes into resonant cavity, and seal cover board is welded on cavity hatch end, and the two cooperatively forms confined space, on seal cover board Resonance piece be vacantly inserted into resonant cavity, adjusting screw be located at resonance piece insertion resonant cavity in one end surface, cavity is wherein The mounting hole that a pair of of through cavities side wall is offered on one lateral wall, cavity wall and adjusting screw place where mounting hole Cavity wall it is parallel, contact pin medium is arranged in mounting hole, is offered in contact pin medium at contact pin media center line Heart hole, contact pin medium protrude into the intracorporal one end of chamber and press against on resonance piece, an epitaxial lateral overgrowth of the resonance piece far from contact pin medium Stretching has boss, and the threaded hole being connected to contact pin media center hole, the centre bore of contact pin medium are offered through boss and resonance piece Inside be equipped with the mounting screw for filter to be connect with antenna, mounting screw one end be located at containment portion in order to antenna The other end of connection, mounting screw through contact pin medium and is screwed into resonance piece, and the end of mounting screw through resonance piece and is twisted Enter in the threaded hole on boss.
Winged bar line is also connected on any two resonance piece on the seal cover board.
The winged bar line is in U-shape structure, flies bar line and is laid on resonance piece, and is provided on resonance piece and sets U for blocking Fly the U-shaped boss of bar thread end, the both ends for flying bar line are fastened in U-shaped boss.
The resonant cavity diameter item is equipped with a pair of mutually matched U-shaped on the top of adjusting screw side and flies bar Seat, U-shaped fly the open end of pole socket towards seal cover board, and U-shaped flies to be arranged with winged bar piece in pole socket, flies bar piece by U-shaped and flies pole socket Open end slide into U-shaped fly pole socket in.
Two contact pins are connect with outermost two resonance pieces respectively.
Several lightening recesses are machined on the chamber outer wall.
Ground connection capillary is provided on chamber outer wall at the contact pin mounting hole.
The beneficial effects of the present invention are: the present invention change conventional filter split mode, changed by vertical folding separation structure Good is left and right side core-pulling structure, resonance piece and cover board integrated design, simplifies the boss etc. for needing to weld in resonance piece installation process Structure reduces inner body quantity, optimizes assembling mode, improves production efficiency.Since resonance piece and seal cover board use Integrated die-casting molding structure ensures that product size/geometric tolerance, surface roughness flatness make product without numerical controlled machine-tool Add, shortens product processing technique process, the application uses mounting screw instead of traditional contact pin, when connecting with antenna Detachably to install, the recycling of filter may be implemented.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of conventional filter.
Fig. 2 is the perspective view of the explosion of conventional filter in Fig. 1.
Fig. 3 is the schematic diagram of the rollover states of conventional filter in Fig. 1.
Fig. 4 is the perspective view of the explosion of filter in Fig. 3.
Fig. 5 is traditional cavity mold of conventional filter.
Fig. 6 is the conventional cover plate mold of conventional filter.
Fig. 7 is the structural schematic diagram of filter in the present invention.
Fig. 8 is the perspective view of the explosion of filter in Fig. 7 in the present invention.
Fig. 9 is the schematic diagram of the rollover states of the filter of Fig. 7 in the present invention.
Figure 10 is the perspective view of the explosion of Fig. 9.
Figure 11 is the installation condition schematic diagram of filter in the application.
Diagram label: 1, adjusting screw, 2, conventional cover plate, 3, winged bar piece, 4, conventional resonance piece, 5, contact pin medium, 6, biography System cavity, 7, contact pin, 8, winged bar line, 9, the winged pole socket of tradition, 10, die ejector pin boss, 11, cover board soldering and sealing face, 12, ground connection capillary Boss, 13, function scoreboard, 14, reflecting plate, 15, coupling plate, 1501, mounting screw holes, 1502, ground connection capillary welding hole, 20, close Cover plate, 40, resonance piece, 401, U-shaped boss, 402, boss, 60, cavity, 6001, weight loss groove, 70, mounting screw, 90, U-shaped Fly pole socket.
Specific embodiment
As shown in the figure, specific embodiment is as follows:
A kind of mounting screw linking cavity body filter, cavity 60 and seal cover board 20 including die cast open at one end, chamber It is machined with several lightening recesses 6001 on 60 outer wall of body, it is fixed there are six interval setting and interconnected humorous on seal cover board 20 Shake piece 40, and resonance piece 40 and seal cover board 20 are integrated die cast structure, and 60 inner cavity of cavity is divided into six by diameter item Interconnected resonant cavity is provided with two rows of 13 on one of lateral wall of cavity for adjusting the tune of filter parameter 1,13 adjusting screws 1 of whole screw divide for positioned at six frequency adjusting screws of resonance piece end and be located at resonance piece close to close Seven Bandwidth adjustment screws at plate end are covered, the side wall of wherein one end through cavities of adjusting screw 1 simultaneously protrudes into resonant cavity, close Capping plate 20 is welded on 60 open end of cavity, and the two cooperatively forms confined space, and the resonance piece 40 on seal cover board 20 is hanging It is inserted into resonant cavity, adjusting screw is located at the surface that resonance piece 40 is inserted into one end in resonant cavity, the one of outside of cavity 60 The mounting hole that a pair of of through cavities side wall is offered on wall offers the cavity wall of mounting hole and is equipped with the chamber of adjusting screw Body sidewall is parallel, and contact pin medium 5 is arranged in mounting hole, is offered at contact pin media center line through the center of contact pin medium Hole, contact pin medium 5 protrude into the intracorporal one end of chamber and are pressed on outermost resonance piece, a side of the resonance piece far from contact pin medium to It is extended with boss 402 outside, the threaded hole being connected to contact pin media center hole is offered through boss 402 and resonance piece, contact pin is situated between It is equipped with mounting screw 70 in matter 5,70 one end of mounting screw is located at containment portion in order to connect with antenna, mounting screw 70 The other end is through contact pin medium and is screwed into resonance piece, and the end of mounting screw through resonance piece and is screwed into the threaded hole on boss In, ground connection capillary is provided on the chamber outer wall at contact pin mounting hole.
First resonance piece 40 and third resonance piece in resonance piece on the seal cover board 20, since one end On also support be connected with winged bar line 8, fly bar line 8 and be in U-shape structure, fly bar line 8 and be laid on resonance piece, and be provided on resonance piece The U-shaped boss that U flies bar thread end is set for card, the both ends for flying bar line are fastened in U-shaped boss.
The resonant cavity diameter item is equipped with a pair of mutually matched U-shaped on the top of adjusting screw side and flies pole socket 90, U-shaped flies to offer on pole socket and flies pole socket sliding with the mutually matched groove of diameter item, U-shaped and be fastened on diameter item, passes through control U U-shaped is flown pole socket towards seal cover board and is caught on diameter item by the open end that shape flies pole socket, and winged bar piece 3 is then flown pole socket by U-shaped Open end slide into U-shaped fly pole socket in be supported on U-shaped fly pole socket 90 on.
The filter of traditional structure is processed generally by traditional thermal die casting machine, and usually two pieces of moulds are formed, It is locked by two pieces of modules via oil pressure when molding, after two modules combine, liquid metal is injected in die cavity by shunting son and runner, Therefore it be easy to cause air to be involved in die cavity, in order to avoid the generation of this situation, common way is addition overflowing well in finished product week Gas vent to be enclosed or designed, causes waste material specific gravity high, speed of production is slow, is easy to produce flash, and die life is short, and it is costly and cumbersome, High energy consumption etc..And the structure in the present invention can be processed using microdiecast mode, generally use 2-6 standalone module Replace traditional two block combiners, liquid metal is directly cast into die cavity via die parting line when molding, is reduced consumption, is saved the energy, saves Secondary operation is gone, production cost is substantially reduced.Multiaxial type mold design, structure diversification, the big (2-6 of die joint selection elasticity Face), can be from any angle, direction draft, for Product Precision up to 0.02mm, wall thickness is most thin to accomplish 0.2mm.Compared to tradition side Case, the present invention add thimble position, capillary boss without machine, and cavity cover board soldering and sealing face greatly improves production efficiency and homogeneity of product. Filter in use, offers ground connection capillary welding hole 1502 and mounting screw holes on the coupling plate 15 of antenna 1501, the through-hole through reflecting plate 14 and function scoreboard 13 is offered above mounting screw holes and ground connection capillary welding hole, it will Ground connection capillary is threaded through in ground connection capillary welding hole, then mounting screw is sequentially passed through to the installation of function scoreboard 13 and reflecting plate 14 Screw hole 1501, penetrates in the centre bore of contact pin medium, is then screwed into resonance piece 40 and boss 402, will by mounting screw Resonant cavity is fixed on coupling plate 15.
Technical solution cited by the present invention and embodiment and non-limiting, with technical solution cited by the present invention and Embodiment is equivalent or effect same approach is all in the range of the present invention is protected.

Claims (7)

1. a kind of mounting screw linking cavity body filter, cavity and seal cover board including die cast open at one end are close Several interval settings and resonance piece interconnected are fixed on capping plate, it is characterised in that: the resonance piece and sealing cover Plate is integrated die cast structure, and cavity inner cavity is divided into several interconnected resonant cavities by diameter item, and cavity is wherein It is provided on one lateral wall several for adjusting the adjusting screw of filter parameter, wherein one end through cavities of adjusting screw Side wall and protrude into resonant cavity, seal cover board is welded on cavity hatch end, and the two cooperatively forms confined space, seal cover board On resonance piece be vacantly inserted into resonant cavity, adjusting screw be located at resonance piece insertion resonant cavity in one end surface, cavity its In the mounting hole of a pair of of through cavities side wall, cavity wall and adjusting screw institute where mounting hole are offered on a lateral wall Cavity wall it is parallel, contact pin medium is arranged in mounting hole, is offered at contact pin media center line through contact pin medium Centre bore, contact pin medium protrude into the intracorporal one end of chamber and press against on resonance piece, and side of the resonance piece far from contact pin medium is outside It is extended with boss, the threaded hole being connected to contact pin media center hole, the center of contact pin medium are offered through boss and resonance piece Be equipped with the mounting screw for filter to be connect with antenna in hole, mounting screw one end be located at containment portion in order to day The other end of line connection mounting screw through contact pin medium and is screwed into resonance piece, and the end of mounting screw through resonance piece and is twisted Enter in the threaded hole on boss,.
2. a kind of mounting screw linking cavity body filter according to claim 1, it is characterised in that: the sealing cover Winged bar line is also connected on any two resonance piece on plate.
3. a kind of mounting screw linking cavity body filter according to claim 2, it is characterised in that: the winged bar line Be in U-shape structure, flies bar line and is laid on resonance piece, and is provided on resonance piece and sets the U-shaped boss that U flies bar thread end for card, The both ends for flying bar line are fastened in U-shaped boss.
4. a kind of mounting screw linking cavity body filter according to claim 1, it is characterised in that: the resonant cavity Diameter item is equipped with a pair of mutually matched U-shaped on the top of adjusting screw side and flies pole socket, and U-shaped flies the open end court of pole socket To seal cover board, U-shaped flies to be arranged with winged bar piece in pole socket, flies bar piece by the open end slide-in U-shaped that U-shaped flies pole socket and flies pole socket In.
5. a kind of mounting screw linking cavity body filter according to claim 1, it is characterised in that: described two insert Needle is connect with outermost two resonance pieces respectively.
6. a kind of mounting screw linking cavity body filter according to claim 1, it is characterised in that: outside the cavity Several lightening recesses are machined on wall.
7. a kind of mounting screw linking cavity body filter according to claim 1, it is characterised in that: the contact pin peace Ground connection capillary is provided on chamber outer wall at dress hole.
CN201811480088.6A 2018-12-05 2018-12-05 A kind of mounting screw linking cavity body filter Pending CN109509946A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201811480088.6A CN109509946A (en) 2018-12-05 2018-12-05 A kind of mounting screw linking cavity body filter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201811480088.6A CN109509946A (en) 2018-12-05 2018-12-05 A kind of mounting screw linking cavity body filter

Publications (1)

Publication Number Publication Date
CN109509946A true CN109509946A (en) 2019-03-22

Family

ID=65751599

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201811480088.6A Pending CN109509946A (en) 2018-12-05 2018-12-05 A kind of mounting screw linking cavity body filter

Country Status (1)

Country Link
CN (1) CN109509946A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110854485A (en) * 2019-10-18 2020-02-28 广东通宇通讯股份有限公司 Common resonator filter

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110854485A (en) * 2019-10-18 2020-02-28 广东通宇通讯股份有限公司 Common resonator filter

Similar Documents

Publication Publication Date Title
CN109509946A (en) A kind of mounting screw linking cavity body filter
CN209183695U (en) A kind of mounting screw linking cavity body filter
CN209183696U (en) A kind of contact pin linking cavity body filter
CN110289470A (en) A kind of three-stage filter
CN102361114A (en) Filter cavity body, cavity body filter, manufacturing methods and die-casting mold
CN109509947A (en) A kind of contact pin linking cavity body filter
CN110394425A (en) One kind can be quickly cooled down Piston mould
CN201573045U (en) Hot correcting combined mould used for blade forging
CN210817392U (en) Die casting die
CN209896219U (en) Three-section filter
CN1962230B (en) Mould for molding plastic lens
CN211588435U (en) Penetrate wax mould suitable for swirler
CN209439425U (en) Tilted casting machine device for clamping mould
CN102107258A (en) Valve body wax mold of tri-eccentric butt-clamped metal sealing butterfly valve
CN106169637A (en) A kind of coaxial cavity filter
CN107520421B (en) A kind of antenna holder base angle die-casting forming die
CN109483807A (en) A kind of deformable injection mold
CN202147001U (en) Side die of low-pressure casting die of aluminum vehicle wheel
CN212948707U (en) Variable ejection mechanism
CN211052516U (en) Powder metallurgy bush mould
CN213936119U (en) Plastic packaging mold with adjustable packaging thickness and packaging device
CN209781050U (en) Engine cylinder body
CN201060917Y (en) Foundry molding duplexer
CN210937063U (en) Die casting die convenient to overhaul
CN217073165U (en) Be applied to mould of production drain pan

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination