A pin blade mold with anti-flash effect

Abstract

The present application relates to injection mold technical field, and disclose a kind of needle piece mold with anti-flash effect, including upper die, lower die, left die, right die and core, the inside of lower die is provided with perforation, and the inner wall of perforation is fixedly connected with mould pipe, the upper surface of lower die is provided with connecting channel, and the upper surface of upper die is provided with injection hole communicated with connecting channel, the sidewall of left die and right die is provided with model hole, and the inner wall of model hole is provided with connecting hole communicated with connecting channel.The present application, by setting straightening hole and control mechanism etc. are used in cooperation, can be when lower die moves downward and carries out mould closing, control core inserts into straightening hole, straighten for core, before injection, straightened core is pushed to the position required by first spring, injection can be carried out, when injection, since core is just straightened, not only can increase the accuracy when injection, and avoid the problem that core may be broken when using due to core deformation.

Description

TECHNICAL FIELD

[0001] The present application relates to injection mold technical field, specifically to a needle piece mold with anti-flash effect. BACKGROUND

[0002] The venous indwelling needle includes a needle and a needle piece wing structure, wherein the needle piece wing can be directly injection molded by a mold, and the needle piece wing includes a wing and a connecting head. The connecting head can connect the infusion tube and the needle. In order to form a hole for connecting the needle and the infusion tube in the connecting head during injection molding, a core is used to fill the middle position of the injection molded connecting head. After the injection molding of the connecting head is completed, the core is pulled out, and the hole for connecting the needle and the infusion tube is formed on the connecting head.

[0003] Because the hole required for connecting the needle is very small, in order to ensure that such a small hole can be injection molded, a very thin core is used. The diameter of the thinnest core at one end is only about half a millimeter. Such a thin core is prone to deformation during use. If the deformation of the core reaches a certain degree, the core will have the risk of breaking. When the indwelling needle wing and the injection handle formed by injection molding are broken, flash may be left.

[0004] Therefore, the present application provides a needle piece mold with anti-flash effect to solve the above problems. SUMMARY

[0005] The present application aims to solve the problems in the prior art and provides a needle piece mold with anti-flash effect.

[0006] In order to achieve the above-mentioned purpose, the present application adopts the following technical scheme:

[0007] A needle piece mold with anti-flash effect includes an upper mold, a lower mold, a left mold, a right mold, and a core. A through hole is formed in the inner wall of the lower mold, and a mold pipe is fixedly connected to the inner wall of the through hole. A connecting channel is formed on the upper surface of the lower mold, and an injection hole is formed on the upper surface of the upper mold and communicates with the connecting channel. Model holes are formed in the side walls of the left mold and the right mold, and connecting holes are formed in the inner walls of the model holes and communicate with the connecting channel. The upper mold includes a mold body and a mold cover. The mold cover is fixed to the lower surface of the mold body. A sliding groove is formed on the lower surface of the mold body, and a limiting slide block is slidably connected to the inner wall of the sliding groove. The lower surface of the limiting slide block is fixedly connected to the core, and one end of the core penetrates through the mold cover. A first spring is fixedly connected to the lower surface of the limiting slide block, and one end of the first spring is fixedly connected to the mold cover. A cavity is formed on the lower surface of the mold body, and a control mechanism is arranged in the cavity. A straightening hole is formed in the inner wall of the mold pipe.

[0008] Preferably, the control mechanism comprises a piston in sliding connection with the inner wall of the cavity, the lower surface of the piston is fixedly connected with a control rod, one end of the control rod is arranged through the mold cover, the upper surface of the piston is fixedly connected with a pipeline, the inner wall of one end of the pipeline is fixedly connected with a one-way valve, the top of the cavity is provided with an air hole in communication with a sliding groove, the outer wall of the pipeline is provided with a first exhaust hole and a second exhaust hole, the top of the cavity is provided with a first accommodation groove, and a second spring is arranged in the first accommodation groove, and one end of the second spring is in abutment with the piston.

[0009] Preferably, the lower mold, the left mold and the right mold are provided with half-limiting grooves in the side wall below the control rod.

[0010] Preferably, the top of the sliding groove is provided with a second accommodation groove, and a buffer block is arranged in the second accommodation groove, the upper surface of the buffer block is fixedly connected with a third spring, and one end of the third spring is fixedly connected with the top of the second accommodation groove.

[0011] Preferably, the outer wall of the core is slidably sleeved with a protective sleeve, one end of the protective sleeve is arranged through the mold cover, and the other end of the protective sleeve is fixedly connected with a counterweight stop ring.

[0012] Preferably, the lower end of the control rod is provided with a chamfer.

[0013] Preferably, the connecting hole is in the shape of a taper with the upper part larger than the lower part.

[0014] Preferably, the outer wall of the mold body is provided with a first exhaust hole in communication with the cavity.

[0015] Preferably, the outer wall of the limiting sliding block is fixedly sleeved with a soft sleeve, and the inner wall of the sliding groove is provided with a second exhaust hole in communication with the cavity.

[0016] Compared with the prior art, the present application has the following advantages:

[0017] 1. By cooperating the straightening hole with the control mechanism, the core can be inserted into the straightening hole when the upper mold moves downward to perform clamping, so that the core is straightened, and after straightening, the core is pushed to the required position by the first spring, and then injection molding can be performed.

[0018] 2. By arranging the half-limiting grooves, when the left mold and the right mold move towards the lower mold to perform clamping, the two half-limiting grooves can form a complete limiting groove, so that one end of the control rod can be inserted into the limiting groove, and when the upper mold moves downward, the control rod can guide the clamping of the lower mold and the upper mold.

[0019] 3、The application, by setting the second let go of the groove, buffer block and third spring cooperation can be used, when the core to move down and received longitudinal vibration force, longitudinal vibration force is transmitted to the buffer block, and then make the buffer block up, the core received vibration force conversion into the potential energy of buffer block, decompose a part of the core received impact, and further protect the core.

[0020] 4、The application, by setting the protective sleeve and counterweight ring cooperation can be used to protect the core; when the upper die and lower die, the protective sleeve can be retracted into the chute, and further will not affect the die of upper die and lower die, when the upper die reset, the protective sleeve will slide out under the action of gravity, cover in the core, further protect the core, avoid the core damaged by external force.

[0021] 5、The application, by setting the upper and lower small connecting hole, can be broken off when the injection molding of the needle wing and injection handle connection, make the fracture close to the needle, to avoid the needle wing on the injection handle of the fly edge residual. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 The three-dimensional structure schematic diagram of the needle piece mold with the anti-fly edge effect is provided for the application;

[0023] Figure 2 The front view structure schematic diagram of the needle piece mold with the anti-fly edge effect is provided for the application;

[0024] Figure 3 The Figure 1 The structure schematic diagram of the enlarged structure in A of the application;

[0025] Figure 4 The Figure 2 The structure schematic diagram of the enlarged structure in B of the application;

[0026] Figure 5 The side view structure schematic diagram of the needle piece mold with the anti-fly edge effect is provided for the application;

[0027] Figure 6 The structure schematic diagram of the upper die is provided for the application;

[0028] Figure 7 The structure schematic diagram of the pipeline is provided for the application;

[0029] Figure 8 The structure schematic diagram of the core is provided for the application;

[0030] Figure 9 The structure schematic diagram of the mold pipe is provided for the application;

[0031] Figure 10 The local structure schematic diagram of the needle piece mold with the anti-fly edge effect is provided for the application.

[0032] In the figure: 1, the upper die; 2, the lower die; 3, the left die; 4, the right die; 5, the core; 6, the through hole; 7, the die pipe; 8, the connecting channel; 9, the injection hole; 10, the model hole; 11, the connecting hole; 12, the sliding slot; 13, the limiting sliding block; 14, the first spring; 15, the cavity; 16, the straightening hole; 17, the piston; 18, the control rod; 19, the pipeline; 20, the one-way valve; 21, the air hole; 22, the first exhaust hole; 23, the second exhaust hole; 24, the first clearance groove; 25, the second spring; 26, the half limiting groove; 27, the second clearance groove; 28, the buffer block; 29, the third spring; 30, the protective sleeve; 31, the counterweight stop ring; 32, the first exhaust hole; 33, the second exhaust hole; 101, the die body; 102, the die cover. DETAILED DESCRIPTION

[0033] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of the present application.

[0034] Please refer to Figures 1-10 A needle piece mold with anti-flash effect, comprising an upper die 1, a lower die 2, a left die 3, a right die 4 and a core 5, the inside of the lower die 2 is provided with a through hole 6, and the inner wall of the through hole 6 is fixedly connected with a die pipe 7, the upper surface of the lower die 2 is provided with a connecting channel 8, and the upper surface of the upper die 1 is provided with an injection hole 9 in communication with the connecting channel 8, the side walls of the left die 3 and the right die 4 are both provided with a model hole 10, and the inner wall of the model hole 10 is provided with a connecting hole 11 in communication with the connecting channel 8, the upper die 1 comprises a die body 101 and a die cover 102, (the upper die 1 is divided into two parts of the die body 101 and the die cover 102, mainly for setting a sliding slot 12 and installing a control mechanism and the like) the die cover 102 is fixed on the lower surface of the die body 101, the lower surface of the die body 101 is provided with a sliding slot 12, and the inner wall of the sliding slot 12 is slidably connected with a limiting sliding block 13, the lower surface of the limiting sliding block 13 is fixedly connected with the core 5, and one end of the core 5 penetrates through the die cover 102, the lower surface of the limiting sliding block 13 is fixedly connected with a first spring 14, and one end of the first spring 14 is fixedly connected with the die cover 102, the lower surface of the die body 101 is provided with a cavity 15, and the cavity 15 is provided with a control mechanism, and the inside of the die pipe 7 is provided with a straightening hole 16.

[0035] From the above structure can be known: by setting straightening hole 16 and control mechanism and so on cooperation can be used, when the upper die 1 moves downward to perform the mold closing, control the core 5 downward inserted into the straightening hole 16, straighten the core 5, before injection molding, the straightened core 5 is pushed to the required position by the first spring 14, that is, injection molding can be performed. When injection molding, since the core 5 has just been straightened, not only the accuracy during injection molding can be increased, but also the problem that the core 5 may be broken during use due to deformation of the core 5 can be avoided.

[0036] Further, the control mechanism comprises a piston 17 in sliding connection with the inner wall of the cavity 15, and the lower surface of the piston 17 is fixedly connected with a control insertion rod 18, one end of the control insertion rod 18 penetrates the mold cover 102, the upper surface of the piston 17 is fixedly connected with a pipeline 19, and the inner wall of one end of the pipeline 19 is fixedly connected with a one-way valve 20, the top of the cavity 15 is provided with a gas hole 21 communicating with the sliding groove 12, the outer wall of the pipeline 19 is provided with a first exhaust hole 22 and a second exhaust hole 23, and the top of the cavity 15 is provided with a first accommodation groove 24, the second spring 25 is arranged in the first accommodation groove 24, and one end of the second spring 25 abuts against the piston 17; by setting the piston 17, the control insertion rod 18 and the pipeline 19 and so on cooperation can be used, when the upper die 1 moves downward to perform the mold closing, the control insertion rod 18 can abut against the lower die 2, thereby pushing the piston 17 to move, the moving piston 17 compresses the air in the cavity 15, so that the air enters the sliding groove 12 through the gas hole 21, the gas in the sliding groove 12 drives the limiting sliding block 13 and the core 5 to move downward, so that one end of the core 5 can be inserted into the straightening hole 16, thereby straightening the core 5, and after the core 5 is completed, the continuously moving piston 17 pushes one end of the pipeline 19 out of the upper die 1, thereby enabling the gas in the sliding groove 12 and the cavity 15 to be exhausted, and thereby enabling the first spring 14 to push the core 5 to the required position.

[0037] Further, the side walls below the control insertion rod 18 of the lower die 2, the left die 3 and the right die 4 are each provided with a half-limiting groove 26; by setting the half-limiting groove 26, when the left die 3 and the right die 4 move towards the lower die 2 to perform the mold closing, the two half-limiting grooves 26 can form a whole limiting groove, thereby enabling one end of the control insertion rod 18 to be inserted into the limiting groove, so that when the upper die 1 moves downward, the control insertion rod 18 can guide the mold closing of the lower die 2 and the upper die 1.

[0038] Further, the top of the sliding groove 12 is provided with a second accommodating groove 27, and a buffer block 28 is arranged in the second accommodating groove 27. The upper surface of the buffer block 28 is fixedly connected with a third spring 29, and one end of the third spring 29 is fixedly connected with the top of the second accommodating groove 27. By arranging the second accommodating groove 27, the buffer block 28 and the third spring 29, when the core 5 moves downward and is subjected to a longitudinal vibration force, the longitudinal vibration force is transmitted to the buffer block 28, and then the buffer block 28 moves upward, so that the vibration force received by the core 5 is converted into potential energy of the buffer block 28, and a part of the impact received by the core 5 is decomposed, thereby protecting the core 5.

[0039] Further, the outer wall of the core 5 is sleeved with a protective sleeve 30, one end of the protective sleeve 30 penetrates the mold cover 102, and the other end of the protective sleeve 30 is fixedly connected with a counterweight retaining ring 31. By arranging the protective sleeve 30 and the counterweight retaining ring 31, the core 5 can be protected. When the upper die 1 and the lower die 2 are closed, the protective sleeve 30 can be retracted into the sliding groove 12, so as not to affect the closing of the upper die 1 and the lower die 2. When the upper die 1 is reset, the protective sleeve 30 slides out under the action of gravity, and is sleeved on the core 5, further protecting the core 5 from damage by external force.

[0040] Further, the lower end of the control plug 18 is provided with a chamfer; by arranging the chamfer, the control plug 18 is conveniently inserted into the limiting groove formed by the two half-limiting grooves 26.

[0041] Further, the connecting hole 11 is tapered from large at the top to small at the bottom; by arranging the connecting hole 11 tapered from large at the top to small at the bottom, when the injection-molded retaining needle wing is broken off from the injection handle, the retaining needle close to the injection handle is broken off, so as to avoid the residual flash of the injection handle on the retaining needle wing.

[0042] Further, the outer wall of the mold body 101 is provided with a first exhaust hole 32 communicating with the cavity 15; by arranging the first exhaust hole 32, the gas in the cavity 15 is conveniently exhausted or introduced, so as to avoid the formation of high pressure or negative pressure in the cavity 15 below the piston 17, thereby affecting the movement of the piston 17.

[0043] Further, the outer wall of the limiting sliding block 13 is fixedly sleeved with a soft sleeve, and the inner wall of the sliding groove 12 is provided with a second exhaust hole 33 communicating with the cavity 15; by arranging the second exhaust hole 33, the gas in the sliding groove 12 is exhausted or introduced through the second exhaust hole 33, so as to avoid the gas in the sliding groove 12 affecting the movement of the limiting sliding block 13.

[0044] In the application, when the upper die 1 is lowered to close the mold, the control rod 18 is inserted into the two half-limiting grooves 26 to form a whole limiting groove, and abuts against the lower die 2, thereby pushing the piston 17 to move, the moving piston 17 compresses the air in the cavity 15, so that the air enters the chute 12 through the air hole 21, the gas in the chute 12 pushes the limiting slider 13 and the core 5 to move downward, so that one end of the core 5 can be inserted into the straightening hole 16, thereby straightening the core 5, and after the core 5 is completed, the continuously moving piston 17 pushes one end of the pipeline 19 out of the upper die 1, thereby allowing the gas in the chute 12 and the cavity 15 to be discharged, and thereby the first spring 14 can push the core 5 to the required position; that is, the injection molding can be performed, and since the core 5 has just been straightened, the accuracy during injection molding can be increased, and the problem that the core 5 may be broken during use due to deformation of the core 5 can be avoided.

[0045] It is apparent to those skilled in the art that the present application is not limited to the details of the foregoing exemplary embodiments, and that the present application can be implemented in other specific forms without departing from the spirit or essential characteristics of the present application. Therefore, the embodiments should be considered in all respects as illustrative and not restrictive, the scope of the application being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference signs in the claims should not be construed as limiting the claims to the figures in which the reference signs are used.

[0046] Although embodiments of the present application have been shown and described, it is to be understood that various modifications, substitutions, replacements and changes can be made to these embodiments without departing from the principles and spirit of the present application, the scope of the present application being defined by the appended claims and their equivalents.

Claims

1. A needle-shaped mold with anti-flashing effect, comprising an upper mold (1), a lower mold (2), a left mold (3), a right mold (4), and a core (5), wherein the lower mold (2) has a through hole (6) inside, and a mold tube (7) is fixedly connected to the inner wall of the through hole (6); a connecting channel (8) is provided on the upper surface of the lower mold (2), and an injection hole (9) communicating with the connecting channel (8) is provided on the upper surface of the upper mold (1); mold holes (10) are provided on the side walls of the left mold (3) and the right mold (4), and a connecting hole (11) communicating with the connecting channel (8) is provided on the inner wall of the mold hole (10), characterized in that: The upper mold (1) includes a mold body (101) and a mold cover (102). The mold cover (102) is fixed to the lower surface of the mold body (101). A groove (12) is provided on the lower surface of the mold body (101), and a limit slider (13) is slidably connected to the inner wall of the groove (12). The lower surface of the limit slider (13) is fixedly connected to the core (5), and one end of the core (5) passes through the mold cover (102). A first spring is fixedly connected to the lower surface of the limit slider (13). Spring (14), and one end of the first spring (14) is fixedly connected to the mold cover (102). A cavity (15) is opened on the lower surface of the mold body (101), and a control mechanism is provided in the cavity (15). A straightening hole (16) is opened inside the mold tube (7). By setting the straightening hole (16) and cooperating with the control mechanism, when the upper mold (1) moves down to close the mold, the control core (5) is inserted into the straightening hole (16) to straighten the core (5).

2. A needle die with anti-flash effect according to claim 1, characterized in that, The control mechanism includes a piston (17) that is slidably connected to the inner wall of the cavity (15), and a control rod (18) is fixedly connected to the lower surface of the piston (17). One end of the control rod (18) passes through the mold cover (102). A pipe (19) is fixedly connected to the upper surface of the piston (17), and a one-way valve (20) is fixedly connected to the inner wall of one end of the pipe (19). An air hole (21) communicating with the slide groove (12) is opened at the top of the cavity (15). A first exhaust hole (22) and a second exhaust hole (23) are opened on the outer wall of the pipe (19). A first clearance groove (24) is opened at the top of the cavity (15). A second spring (25) is provided in the first clearance groove (24), and one end of the second spring (25) abuts against the piston (17).

3. A needle die with anti-flash effect according to claim 2, characterized in that, The lower mold (2), left mold (3), and right mold (4) all have semi-limiting grooves (26) on their side walls located below the control rod (18).

4. A needle die with anti-flash effect according to claim 3, characterized in that, The top of the slide (12) is provided with a second clearance groove (27), and a buffer block (28) is provided in the second clearance groove (27). A third spring (29) is fixedly connected to the upper surface of the buffer block (28), and one end of the third spring (29) is fixedly connected to the top of the second clearance groove (27).

5. A needle die with anti-flash effect according to claim 4, characterized in that, The outer wall of the core (5) is provided with a protective sleeve (30), and one end of the protective sleeve (30) is provided through the mold cover (102), and the other end of the protective sleeve (30) is fixedly connected with a counterweight retaining ring (31).

6. A needle die with anti-flash effect according to claim 2, characterized in that, The lower end of the control rod (18) is chamfered.

7. A needle die with anti-flash effect according to claim 1, characterized in that, The connecting hole (11) is tapered, with a larger top and a smaller bottom.

8. A needle die with anti-flash effect according to claim 2, characterized in that, The outer wall of the mold (101) has a first exhaust hole (32) that connects to the cavity (15).

9. A needle die with anti-flash effect according to claim 8, characterized in that, The outer wall of the limiting slider (13) is fixedly fitted with a soft sleeve, and the inner wall of the slide groove (12) is provided with a second exhaust hole (33) that communicates with the cavity (15).

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