A melt head forming process, a mold clamping mold, and a melt head forming apparatus

Abstract

The present application relates to a kind of melt head forming processes, mold and melt head forming equipment, the melt head forming process includes the following steps: step S10: by insertion drive mechanism, drive second forming part is close to first forming part along the axis direction of mandrel, to form forming cavity when the second forming part and the first forming part are attached;Step S20: by feeding part, the material being clamped is moved to the forming cavity, and heating part is heated to the forming cavity;Step S30: when the material moves to target distance, hot melt fills the forming cavity, and heating part stops heating, and the feeding part stops conveying.The present application is used to solve the technical problem of rivet structure formed by adopting secondary plastic forming to insulin pump catheter.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of medical devices, in particular to a melt head forming process, a mold clamping mold and a melt head forming equipment. BACKGROUND

[0002] With the improvement of people's living standards and the acceleration of the pace of life, more and more people suffer from diabetes, and insulin pump as a new type of widely used diabetes treatment equipment, in addition to its own pump structure which can be used for a long time, the rest of the consumable structure (insulin reservoir, connecting tube, special injection needle, special adhesive material) needs to be replaced frequently. The new insulin pump catheter structure mainly adopts rivet-like catheter (rivet-like structure is directly formed on the catheter), and it is still a technical problem to form the rivet structure by secondary plastic forming on the insulin pump catheter with a diameter of less than 2mm in the market. SUMMARY

[0003] Therefore, it is necessary to provide a melt head forming process, a mold clamping mold and a melt head forming equipment to solve the technical problem of forming the rivet structure by secondary plastic forming on the insulin pump catheter.

[0004] The melt head forming process provided by the embodiment of the present application comprises the following steps:

[0005] Step S10: driving the second forming part to move close to the first forming part along the axis direction of the mandrel by the insertion driving mechanism to form a forming cavity when the second forming part and the first forming part are attached;

[0006] Step S20: moving the clamped material to the forming cavity by the feeding part, and heating the forming cavity by the heating part;

[0007] Step S30: when the material moves to the target distance, the material fills the forming cavity after being heated, the heating part stops heating, and the feeding part stops feeding.

[0008] The melt head forming process provided by the embodiment of the present application can drive the second forming part to move close to the first forming part along the axis direction of the mandrel, so as to form a forming cavity when the second forming part and the first forming part are attached, and open the forming cavity when the second forming part and the first forming part are separated from each other. Since the second forming part and the first forming part are separated from each other along the axis direction of the mandrel, the formed melt head catheter will not produce flash on the radial periphery after demolding.

[0009] In one embodiment, step S10 further comprises the following steps:

[0010] Step S11: the force feedback member is connected with the insertion driving mechanism and the second forming part respectively, and is used for feeding back the pressure of the second forming part moving downward to press the first forming part.

[0011] In this way, the second forming part can feedback the pressure in real time.

[0012] In one embodiment, step S11 further comprises the following steps:

[0013] Step S111: judging whether the pressure M received by the second forming part is greater than the preset force N of the force feedback component according to the force feedback of the force feedback component; when M is greater than N, the second forming part stops moving downward and an alarm is given; when M is less than or equal to N, the second forming part continues to press the first forming part until the first forming part is in a closed mold state.

[0014] In this way, the second forming part can adaptively move downward to press the first forming part; when the pressure of the second forming part is too large, the second forming part stops moving downward and an alarm is given; when the pressure of the second forming part is too small, the second forming part continues to press the first forming part.

[0015] In one embodiment, step S20 further comprises the following steps:

[0016] Step S21: driving the material clamped by the pipe clamping assembly to be inserted into the forming cavity along the axial direction of the mandrel by the feeding driving assembly.

[0017] Step S22: when the heating part heats the forming cavity to melt the material, the feeding part continuously feeds the clamped material to the forming cavity.

[0018] In this way, the material can be continuously fed automatically to melt the material into the forming cavity.

[0019] In one embodiment, step S30 further comprises the following steps:

[0020] Step S31: driving the second forming part to move away from the first forming part along the axial direction of the mandrel by the insertion driving mechanism to switch to an open mold state, so as to take out the nozzle pipe.

[0021] In this way, since the second forming part and the first forming part are separated from each other along the axial direction of the mandrel, the formed nozzle pipe will not produce flash on the radial periphery after demolding.

[0022] The application also provides a mold closing mold, comprising a first forming part, a second forming part, a mandrel and a heating part, the first forming part has a moving channel, the mandrel is connected to the second forming part and penetrates the first forming part along the moving channel, wherein the first forming part and the second forming part are relatively slidably superposed along the axial direction of the mandrel to switch between a closed mold state and an open mold state.

[0023] In the closed mold state, the second molding part and the first molding part abut against each other to form a molding cavity in communication with the moving channel, so that the material sleeved on the mandrel extends into the molding cavity through the moving channel;

[0024] The heating part is arranged to heat the material in the molding cavity to form a nozzle part of the nozzle guide in the molding cavity;

[0025] In the open mold state, the second molding part and the first molding part are separated from each other to open the molding cavity to take out the nozzle guide.

[0026] Compared with the existing molding method using left and right mold closing, the mold provided by the embodiment of the disclosure can switch between the closed mold state and the open mold state. In the closed mold state, the second molding part and the first molding part are close to each other, and the molding cavity is formed when they abut against each other. The material extends into the molding cavity along the moving channel, and the heating part heats the material in the molding cavity to form a nozzle part around the mandrel and in communication with the material, and finally forms a nozzle guide.

[0027] In one of the embodiments, the first molding part has a first molding cavity, and the second molding part has a second molding cavity corresponding to the first molding cavity. The first molding cavity and the second molding cavity are closed to each other to form the molding cavity in the closed mold state.

[0028] In this way, when the second molding part and the first molding part are separated from each other along the axis of the mandrel in the open mold state, the formed nozzle part will not produce burrs.

[0029] In one of the embodiments, the first molding part has a guide surface extending to the first molding cavity, and the second molding part has a matching surface extending to the second molding cavity. In the closed mold state, the guide surface and the matching surface are in sliding fit to close the first molding cavity and the second molding cavity to form the molding cavity.

[0030] In this way, the sliding fit of the guide surface and the matching surface enables the first molding part to abut against the first molding part more smoothly along the axis of the mandrel. At the same time, the sliding fit of the guide surface and the matching surface guides the abutment of the first molding part and the second molding part.

[0031] In one of the embodiments, the first forming part has a first forming cavity away from the second forming part and a second forming cavity close to the second forming part, the second forming cavity is in communication with the first forming cavity, the second forming part has a cover surface facing the first forming part, the cover surface covers the second forming cavity to form the forming cavity.

[0032] In this way, when the second forming part and the first forming part are separated from each other along the axis of the mandrel in the open mold state, the formed tip part will not have flash at its radial periphery.

[0033] In one of the embodiments, the first forming cavity extends in a tapering manner from the second forming cavity along the axis of the mandrel to the moving channel; the second forming cavity extends in a constant diameter along the axis of the mandrel.

[0034] In this way, since the first forming cavity extends in a tapering manner from the second forming cavity towards the moving channel, and the second forming cavity extends in a constant diameter along the axis of the mandrel, when the second forming part and the first forming part are separated from each other along the axis of the mandrel in the open mold state, the formed tip part will not have flash at its radial periphery.

[0035] The present application also provides a tip forming device, which comprises an insertion part, a feeding part and a fixing part, and the mold, the first forming part, the insertion part and the feeding part are arranged in the fixing part.

[0036] The insertion part is drivingly connected with the second forming part to make the mandrel penetrate through the first forming part along the moving channel.

[0037] The feeding part comprises a feeding driving assembly and a catheter clamping assembly arranged in the feeding driving assembly; the catheter clamping assembly is driven by the feeding driving assembly, and the material clamped by the catheter clamping assembly is inserted into the forming cavity along the axis of the mandrel.

[0038] The tip forming device provided by the present disclosure has the insertion part drivingly connected with the second forming part to make the mandrel penetrate through the first forming part along the moving channel. The feeding driving assembly and the catheter clamping assembly are drivingly connected to drive the material clamped in the catheter clamping assembly to approach or move away from the mandrel, so that the material is sleeved on the mandrel when the material approaches the mandrel, and the material is inserted into the forming cavity until the material is subjected to tip processing by the mold. The catheter clamping assembly is driven by the feeding driving assembly to insert the material clamped in the catheter clamping assembly into the forming cavity along the axis of the mandrel, and the material is melted by the mold to form the tip part of the tip catheter.

[0039] In one of the embodiments, the insertion part further comprises a mandrel guiding assembly, the mandrel guiding assembly comprises a guiding driving mechanism installed on the fixed part, a mandrel clamping driving mechanism driving connected with the guiding driving mechanism, and a mandrel guiding member driving connected with the mandrel clamping driving mechanism.

[0040] The guiding driving mechanism can drive the mandrel clamping driving mechanism to approach or move away from the mandrel arranged on the closing mold, so that when the mandrel clamping driving mechanism approaches the mandrel, the mandrel clamping driving mechanism drives the mandrel guiding member to limit the mandrel.

[0041] In this way, the mandrel is fixed to the second forming part and penetrates through the moving channel and extends out of the first forming part. Due to the length of the mandrel, the mandrel may swing due to external influences, causing the material to fail to be sleeved on the mandrel. The guiding driving mechanism is used to drive the mandrel clamping driving mechanism to approach or move away from the mandrel arranged on the closing mold. When the mandrel clamping driving mechanism approaches the mandrel, the mandrel clamping driving mechanism drives the mandrel guiding member to limit the mandrel, so as to stabilize the mandrel and facilitate the subsequent material to be smoothly sleeved on the mandrel.

[0042] In one of the embodiments, the catheter clamping assembly comprises a catheter clamping driving mechanism and a catheter clamping member, the catheter clamping driving mechanism drives the catheter clamping member to be able to clamp the material.

[0043] In this way, the feeding driving assembly is used to drive the material clamped by the catheter clamping member to approach or move away from the mandrel, so that when the material approaches the mandrel, it is sleeved on the mandrel.

[0044] In one of the embodiments, the feeding part further comprises a catheter supporting assembly, the catheter supporting assembly comprises a catheter supporting driving mechanism installed on the feeding driving assembly and a catheter supporting member driving connected with the catheter supporting driving mechanism, the catheter supporting driving mechanism can drive the catheter supporting member to approach or move away from the material clamped by the catheter clamping member, so that when the catheter supporting member approaches the material, it supports the material.

[0045] In this way, when the material is clamped in the catheter clamping assembly, and the mandrel clamping driving mechanism drives the mandrel guiding member to limit the mandrel, in order to enable the material to be accurately sleeved on the mandrel, the catheter supporting driving mechanism can drive the catheter supporting member to stably support the material when it approaches the material clamped by the catheter clamping member.

[0046] In one of the embodiments, the insertion part further comprises an insertion driving mechanism, the insertion driving mechanism is driving connected with the second forming part to drive the second forming part to approach or move away from the first forming part, so as to form the forming cavity when the second forming part is attached to the first forming part.

[0047] Thus, the insertion driving mechanism is drivingly connected with the second forming part to drive the second forming part to move close to or away from the first forming part, and the second forming part is pressed against the first forming part to form a forming cavity, and the heating part heats the material in the forming cavity to form a melt head part of the melt head conduit.

[0048] In summary, the above-mentioned various embodiments of the present application can have one or more of the following advantages or beneficial effects:

[0049] (1) Avoiding the generation of flash on the radial periphery of the melt head conduit. The first forming part and the second forming part are relatively slidably stacked together along the axis of the mandrel, and can be switched between the closed mold state and the open mold state. Since the second forming part and the first forming part are separated from each other along the axis of the mandrel, the melt head conduit after forming will not generate flash on its radial periphery after demolding.

[0050] (2) High degree of automation. The second forming part is driven by the insertion driving part to move close to the first forming part along the axis of the mandrel to form the forming cavity when the second forming part and the first forming part are pressed together.

[0051] (3) Good feedback effect. The pressure of the second forming part pressing down on the first forming part can be fed back in real time. BRIEF DESCRIPTION OF DRAWINGS

[0052] Figure 1 is a schematic diagram of the three-dimensional structure of the product after forming in an embodiment of the present application;

[0053] Figure 2 is a flowchart of the melt head forming process in an embodiment of the present application;

[0054] Figure 3 is a flowchart of the force feedback element in the melt head forming process in an embodiment of the present application;

[0055] Figure 4 is a schematic diagram of the closed mold 10 in an embodiment of the present application;

[0056] Figure 5 is Figure 4 is a cross-sectional view at A-A in FIG. 10;

[0057] Figure 6 is Figure 5 is an enlarged view of circle B in FIG. 10;

[0058] Figure 7 is a combined schematic diagram of the second forming part 12 and the first forming part 11 in abutment in an embodiment of the present application;

[0059] Figure 8Fig. 2 is a schematic view of the combination of the second forming part 12 and the first forming part 11 according to another embodiment of the present application;

[0060] Figure 9 Fig. 1 is a schematic view of the structure of the melt head forming apparatus 100 according to an embodiment of the present application;

[0061] Figure 10 Fig. 4 is a schematic view of the feeding part 30 of the melt head forming apparatus 100 according to an embodiment of the present application.

[0062] BRIEF DESCRIPTION OF THE DRAWINGS

[0063] 100, melt head forming apparatus; 10, mold closing mold; 11, first forming part; 111, moving channel; 112, first forming cavity; 113, guide surface; 12, second forming part; 121, second forming cavity; 122, matching surface; 13, core rod; 14, heating part; 20, insertion part; 21, insertion driving mechanism; 22, core rod guide assembly; 221, guide driving mechanism; 222, core rod clamping driving mechanism; 223, core rod guide; 30, feeding part; 31, feeding driving assembly; 32, catheter clamping assembly; 321, catheter clamping driving mechanism; 322, catheter clamping piece; 33, catheter support assembly; 331, catheter support driving mechanism; 332, catheter support piece; 40, fixing part; 50, moving part; 60, cutting part; 200, melt head catheter; 210, catheter part; 220, melt head part. DETAILED DESCRIPTION

[0064] In order to make the above object, features and advantages of the present application more obvious and easy to understand, the specific embodiments of the present application will be described in detail below with reference to the drawings. In the following description, a lot of specific details are set forth in order to fully understand the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the spirit of the present application, so the present application is not limited to the specific embodiments disclosed below.

[0065] In the description of the present application, it should be understood that the terms "upper", "lower", "vertical", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0066] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting", "fixing" and the like should be understood in a broad sense, for example, it can be fixed connection, or detachable connection, or integrated; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, it can be the internal communication of two elements or the interaction relationship of two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0067] In combination Figures 1 to 10 As shown, the present application provides a melt head forming process, comprising the following steps:

[0068] Step S10: by inserting the driving mechanism 21, driving the second forming part 12 to move close to the first forming part 11 along the axis direction of the mandrel 13, so as to form a forming cavity when the second forming part 12 and the first forming part 11 are attached;

[0069] Step S20: by the feeding part 30, moving the clamped material to the forming cavity, and the heating part 14 performs heating treatment on the forming cavity;

[0070] Step S30: when the material moves to the target distance, the melt fills the forming cavity, the heating part 14 stops heating, and the feeding part 30 stops feeding.

[0071] The melt head forming process provided by the embodiment of the present application can drive the second forming part 12 to move close to the first forming part 11 along the axis direction of the mandrel 13 by the inserting driving mechanism 21, so as to form a forming cavity when the second forming part 12 and the first forming part 11 are attached, and open the forming cavity when the second forming part 12 and the first forming part 11 are separated from each other. Because the second forming part 12 and the first forming part 11 are separated from each other along the axis direction of the mandrel 13, the formed melt head conduit 200 will not produce flash on its radial periphery after demolding.

[0072] In some embodiments, step S10 further comprises the following steps:

[0073] Step S11: the force feedback member is connected with the inserting driving mechanism 21 and the second forming part 12 respectively, for feeding back the pressure of the second forming part 12 moving downward to extrude the first forming part 11.

[0074] In this way, the pressure of the second forming part 12 moving downward to extrude the first forming part 11 can be fed back in real time.

[0075] In the embodiment, the force feedback member is preferably but not limited to a voice coil motor, and the feedback effect is excellent.

[0076] In some embodiments, step S11 further comprises the following steps:

[0077] Step S111: According to the force feedback of the force feedback piece, it is judged whether the pressure M (initial value is zero) received by the second forming part 12 is greater than the preset force N of the force feedback piece; when M is greater than N, the second forming part 12 stops moving downward, and alarm processing is performed; when M is less than or equal to N, the second forming part 12 continues to press downward to be in a closed mold state with the first forming part 11.

[0078] In this way, the second forming part 12 can adaptively move downward to extrude the first forming part 11, and when the pressure of the second forming part 12 is too large, the second forming part 12 will stop moving downward and perform alarm processing; when the pressure of the second forming part 12 is too small, the second forming part 12 will continue to press the first forming part 11.

[0079] It should be noted that, compared with the secondary forming process in the prior art, the embodiment can more accurately grasp the pressure of the second forming part 12 relative to the first forming part 11 due to the arrangement of the force feedback piece, and thus a smaller nozzle conduit 200 can be formed. Specifically, the embodiment can perform forming processing on a conduit with an outer diameter in the range of 0 to 2 mm.

[0080] It should be noted that, compared with the secondary forming process in the prior art, the embodiment can more accurately grasp the pressure of the second forming part 12 relative to the first forming part 11 due to the arrangement of the force feedback piece, and thus a smaller nozzle conduit 200 can be formed. Specifically, the embodiment can perform forming processing on a conduit with an outer diameter in the range of 0 to 2 mm.

[0081] 5Specifically, step S20 includes the following steps:

[0082] Step S21: The feeding driving assembly 31 drives the material clamped by the conduit clamping assembly 32 to be inserted into the forming cavity along the axis direction of the mandrel 13.

[0083] Step S22: When the heating part 14 heats the forming cavity to melt the material, the feeding part 30 continuously feeds the clamped material to the forming cavity.

[0084] In this way, the material can be continuously fed automatically to melt the material into the forming cavity.

[0085] Further, step S30 further includes the following steps:

[0086] Step S31: The insertion driving mechanism 21 drives the second forming part 12 to move away from the first forming part 11 along the axis direction of the mandrel 13 to switch to an open mold state, so as to take out the nozzle conduit 200.

[0087] In this way, since the second forming part 12 and the first forming part 11 are separated from each other along the axis direction of the mandrel 13, the formed nozzle conduit 200 will not generate flash on its radial periphery after demolding.

[0088] Please refer to Figure 1In the embodiment, the mold 10 is used to melt the material to form the melt head conduit 200, which includes a conduit part 210 and a melt head part 220 connected to the conduit part 210, and the bottom of the melt head part 220 is rounded. Specifically, the mold 10 is used to melt the material to form the melt head part 220, and the melt head part 220 is connected to the material itself to form the melt head conduit 200. It should be noted that the material in the embodiment is a conventional conduit.

[0089] Optionally, in some embodiments, the melt head part 220 is integrally formed with the conduit part 210, or the melt head part 220 is detachably connected to the conduit part 210.

[0090] In combination Figures 3 to 8 As shown in the figure, the mold 10 includes a first forming part 11, a second forming part 12, a core rod 13, and a heating part 14. The first forming part 11 has a moving channel 111, and the core rod 13 is connected to the second forming part 12 and extends through the first forming part 11 along the moving channel 111. The first forming part 11 and the second forming part 12 are relatively slidably stacked along the axis of the core rod 13 to switch between a closed mold state and an open mold state.

[0091] In the closed mold state, the second forming part 12 abuts against the first forming part 11 to form a forming cavity (not labeled in the figure) that is in communication with the moving channel 111, so that the conduit part 210 sleeved on the core rod 13 extends into the forming cavity through the moving channel 111. The heating part 14 is arranged to heat the material in the forming cavity to form the melt head part 220 of the melt head conduit 200 in the forming cavity. In the open mold state, the second forming part 12 is separated from the first forming part 11 to open the forming cavity, so that the melt head conduit 200 is taken out.

[0092] In the conventional technology, the melt head conduit 200 is formed in secondary forming by using left-right mold clamping. However, in the left-right mold clamping, the molten liquid will overflow in the mold gap during the forming process, and flash will be generated on the side of the product, which affects the sealing performance of the product.

[0093] Compared with the existing left-right mold clamping, the mold 10 provided by the embodiment of the disclosure is used to form the melt head conduit 200. The first forming part 11 and the second forming part 12 are relatively slidably stacked along the axis of the core rod 13 to switch between the closed mold state and the open mold state. In the closed mold state, the second forming part 12 is close to the first forming part 11, and the forming cavity is formed when the second forming part 12 abuts against the first forming part 11. The material extends into the forming cavity along the moving channel 111, and the heating part 14 heats the material in the forming cavity to form the melt head part 220 of the melt head conduit 200 in the forming cavity, and finally forms the melt head conduit 200. In this way, the melt head conduit 200 formed will not generate flash on the radial periphery after demolding.

[0094] It should be noted that the clamping state in the embodiment is that the second forming part 12 abuts against the first forming part 11 along the axial direction of the core rod 13 to form a forming cavity for accommodating the nozzle part 220; and the unclamping state in the embodiment is that the second forming part 12 is separated from the first forming part 11 along the axial direction of the core rod 13 to open the forming cavity, thereby facilitating the removal of the nozzle part 220.

[0095] In addition, since the first forming part 11 and the second forming part 12 are relatively slidably stacked together along the axial direction of the core rod 13, the clamping mold 10 occupies a smaller space in the transverse direction, thereby saving space to a certain extent.

[0096] For details, please refer to Figure 7 In some embodiments, the first forming part 11 has a first forming cavity 112 away from the second forming part 12 and a second forming cavity 121 close to the second forming part 12, the second forming cavity 121 is in communication with the first forming cavity 112, and the second forming part 12 has a cover surface (not labeled in the figure) facing the first forming part 11, the cover surface covers the second forming cavity 121 to form a forming cavity. In this way, in the unclamping state, when the second forming part 12 is separated from the first forming part 11 along the axial direction of the core rod 13, the formed nozzle part 220 will not produce flash at the radial periphery thereof.

[0097] It should be noted that the cover surface in the embodiment covers the first forming cavity 112 and the second forming cavity 121 of the first forming part 11 to form a forming cavity, and in the unclamping state, when the second forming part 12 is separated from the first forming part 11 to open the forming cavity, the nozzle part 220 connected with the conduit part 210 can be removed. However, since the core rod 13 is fixedly connected to the second forming part 12, when the second forming part 12 is separated from the first forming part 11, the first forming part 11 will produce a pulling force on the partial nozzle part 220 located in the first forming cavity 112, resulting in a small amount of flash at the bottom round corner of the nozzle part 220 due to the pulling force. Since the flash is located at the bottom round corner of the nozzle part 220, it will not affect subsequent assembly.

[0098] For details, please refer to Figure 8 In other embodiments, the first forming part 11 has a first forming cavity 112, the second forming part 12 has a second forming cavity 121 corresponding to the first forming cavity 112, and the first forming cavity 112 and the second forming cavity 121 are closed to form a forming cavity. In this way, in the unclamping state, when the second forming part 12 is separated from the first forming part 11 along the axial direction of the core rod 13, the formed nozzle part 220 will not produce flash.

[0099] Further, the embodiment is different from the above-mentioned embodiments in that the first forming cavity 112 is formed in the first forming part 11, and the second forming cavity 121 is formed in the second forming part 12; in the closed mold state, the first forming cavity 112 and the second forming cavity 121 are closed to form a forming cavity; in the open mold state, when the second forming part 12 and the first forming part 11 are separated from each other, since the upper part of the melt head part 220 is located in the second forming cavity 121, and the mold closing surface of the first forming part 11 and the second forming part 12 is located at the junction of the first forming cavity 112 and the second forming cavity 121, the second forming part 12 and the first forming part 11 can be separated more easily, and the flash will not be generated around the melt head part 220 in the separation process.

[0100] Preferably, the first forming part 11 has a guide surface 113 extending to the first forming cavity 112, and the second forming part 12 has a matching surface 122 extending to the second forming cavity 121; in the closed mold state, the guide surface 113 and the matching surface 122 are in sliding fit to close the first forming cavity 112 and the second forming cavity 121 to form a forming cavity. In this way, the sliding fit of the guide surface 113 and the matching surface 122 enables the first forming part 11 to abut against the first forming part 11 more smoothly along the axial direction of the mandrel 13. At the same time, the sliding fit of the guide surface 113 and the matching surface 122 plays a guiding role in the abutment of the first forming part 11 and the second forming part 12.

[0101] In the embodiment, the first forming cavity 112 extends from the second forming cavity 121 to the moving channel 111 in a variable diameter manner; and the second forming cavity 121 extends along the axial direction of the mandrel 13 in a constant diameter manner. In this way, the inner diameter of the second forming cavity 121 is greater than or equal to the maximum inner diameter of the first forming cavity 112. Since the first forming cavity 112 extends from the second forming cavity 121 to the moving channel 111 in a variable diameter manner, and the second forming cavity 121 extends along the axial direction of the mandrel 13 in a constant diameter manner, when the second forming part 12 and the first forming part 11 are separated from each other along the axial direction of the mandrel 13 in the open mold state, the formed melt head part 220 will not generate flash around its radial periphery.

[0102] For details, please refer to Figure 9 and Figure 10 The application also provides a melt head forming device 100, which comprises an insertion part 20, a feeding part 30, a fixing part 40, a mold closing mold 10, a first forming part 11, the insertion part 20 and the feeding part 30 are all arranged on the fixing part 40; the insertion part 20 is drivingly connected with the second forming part 12 to penetrate the mandrel 13 along the moving channel 111 through the first forming part 11; the feeding part 30 comprises a feeding driving assembly 31 and a catheter clamping assembly 32 arranged on the feeding driving assembly 31; the catheter clamping assembly 32 drives the material clamped by the catheter clamping assembly 32 to be inserted into the forming cavity along the axial direction of the mandrel 13 under the driving of the feeding driving assembly 31.

[0103] The melt head forming device 100 provided by the embodiment of the present disclosure, the insertion part 20 is drivingly connected with the second forming part 12, for inserting the mandrel 13 along the moving channel 111 through the first forming part 11. The feeding driving assembly 31 is drivingly connected with the guide pipe clamping assembly 32, for driving the material clamped by the guide pipe clamping assembly 32 to approach or move away from the mandrel 13 limited by the mandrel guiding assembly 22, so that the material is sleeved on the mandrel 13 when the material approaches the mandrel 13, until the material extends into the forming cavity, and the material is processed by the melt head by the closed die mold 10. The guide pipe clamping assembly 32 drives the material clamped by the guide pipe clamping assembly 32 to insert into the forming cavity along the axis direction of the mandrel 13 under the driving of the feeding driving assembly 31, and the material is melted by the closed die mold 10 to form the melt head part 220 of the melt head guide pipe 200.

[0104] Specifically, the feeding driving assembly 31, the guiding driving mechanism 221, the mandrel clamping driving mechanism 222, the guide pipe clamping driving mechanism 321 and the guide pipe supporting driving mechanism 331 in the embodiment are one or more of electric cylinders, pneumatic cylinders, hydraulic cylinders or electric push rods; and can be selected according to actual speed, running stability or cost limitation and other factors.

[0105] Specifically, the insertion part 20 further comprises a mandrel guiding assembly 22, the mandrel guiding assembly 22 comprises a guiding driving mechanism 221 arranged on the fixed part 40, a mandrel clamping driving mechanism 222 drivingly connected with the guiding driving mechanism 221, and a mandrel guiding piece 223 drivingly connected with the mandrel clamping driving mechanism 222; the guiding driving mechanism 221 can drive the mandrel clamping driving mechanism 222 to approach or move away from the mandrel 13 arranged on the closed die mold 10, so that the mandrel clamping driving mechanism 222 drives the mandrel guiding piece 223 to limit the mandrel 13 when the mandrel clamping driving mechanism 222 approaches the mandrel 13.

[0106] In this way, the mandrel 13 is fixedly connected with the second forming part 12 and extends through and out of the first forming part 11 along the moving channel 111. Due to the length of the mandrel 13, the mandrel 13 may swing due to external influences, so that the material cannot be sleeved on the mandrel 13. The guiding driving mechanism 221 is used for driving the mandrel clamping driving mechanism 222 to approach or move away from the mandrel 13 limited by the mandrel guiding assembly 22, so that the mandrel clamping driving mechanism 222 drives the mandrel guiding piece 223 to limit the mandrel 13 when the mandrel clamping driving mechanism 222 approaches the mandrel 13, so as to stabilize the mandrel 13 and guide the sleeving of the material, facilitating the subsequent guide pipe part 210 to be smoothly and smoothly sleeved on the mandrel 13. In the embodiment, the mandrel guiding piece 223 is preferably but not limited to a guiding finger clamp, and has good guiding effect.

[0107] In some embodiments, the conduit clamping assembly 32 comprises a conduit clamping driving mechanism 321 and a conduit clamping member 322, the conduit clamping driving mechanism 321 drives the conduit clamping member 322 to clamp the material. In this way, the feeding driving assembly 31 is configured to drive the material clamped by the conduit clamping member 322 to approach or move away from the mandrel 13, so that the material is sleeved on the mandrel 13 when the material approaches the mandrel 13.

[0108] Specifically, the feeding part 30 further comprises a conduit supporting assembly 33, the conduit supporting assembly 33 comprises a conduit supporting driving mechanism 331 arranged on the feeding driving assembly 31 and a conduit supporting member 332 drivingly connected with the conduit supporting driving mechanism 331, the conduit supporting driving mechanism 321 is configured to drive the conduit supporting member 332 to approach or move away from the material clamped by the conduit clamping member 322, so that the conduit supporting member 332 supports the material when the conduit supporting member 332 approaches the material. In this way, when the material is clamped by the conduit clamping assembly 32, and the mandrel guiding member 223 is driven by the mandrel clamping driving mechanism 222 to limit the mandrel 13, in order to enable the material to be accurately sleeved on the mandrel 13, the conduit supporting driving mechanism 331 is configured to drive the conduit supporting member 332 to stably support the material when the conduit supporting member 332 approaches the material clamped by the conduit clamping member 322. In the present embodiment, the conduit supporting member 332 is preferably but not limited to a conduit finger clamp, which has good clamping effect.

[0109] Specifically, the insertion part 20 further comprises an insertion driving mechanism 21, the insertion driving mechanism 21 is drivingly connected with the second forming part 12 to drive the second forming part 12 to approach or move away from the first forming part 11, so that the forming cavity is formed when the second forming part 12 is attached to the first forming part 11. In this way, when the insertion driving mechanism is drivingly connected with the second forming part 12 to drive the second forming part 12 to approach or move away from the first forming part 11, the material in the forming cavity is heated by the heating part 14, so that the melt head part 220 surrounding the mandrel 13 and communicating with the material is formed in the forming cavity.

[0110] In some embodiments, the melt head forming device 100 further comprises a conveying part 50 and a cutting part 60, the cutting part 60 is located on the discharging path of the conveying part 50, the conveying part 50 is drivingly connected with the cutting part 60, and the conveying part 50 is configured to convey the formed melt head conduit 200 to the cutting part 60, so that the melt head conduit 200 is cut to a fixed length by the cutting part 60, which has good cutting effect. Further, the discharging part in the present embodiment is preferably but not limited to a motorized screw rod structure.

[0111] The technical features of the above-described embodiments can be combined in any manner. For the sake of brevity, not all possible combinations of the technical features in the above-described embodiments are described, however, as long as the combinations of the technical features do not contradict each other, they should be considered within the scope of the present disclosure.

[0112] The above embodiments only express several implementation manners of the present application, and the description is more specific and detailed, but it should not be understood as a limitation on the scope of the patent. It should be noted that for ordinary skilled persons in the art, without departing from the concept of the present application, several modifications and improvements can be made, which are within the scope of protection of the present application. Therefore, the protection scope of the patent of the present application should be subject to the appended claims.

Claims

1. A melt head forming process characterized by, The method comprises the following steps: Step S10: driving the second forming part to move along the axial direction of the mandrel towards the first forming part by the insertion driving mechanism to form a forming cavity when the second forming part is attached to the first forming part; wherein the first forming part has a moving channel, the mandrel is connected to the second forming part and penetrates through the first forming part along the moving channel, and the forming cavity is communicated with the moving channel; Step S20: continuously moving the clamped material through the moving channel into the forming cavity by the feeding part, and heating the forming cavity by the heating part; Step S30: when the material moves to the target distance, the forming cavity is filled after hot melting, the heating part stops heating, and the feeding part stops feeding.

2. The orifice forming process of claim 1 wherein, Step S10 further comprises the following steps: Step S11: the force feedback member is connected with the insertion driving mechanism and the second forming part respectively, and is used for feeding back the pressure of the second forming part moving downwards to press the first forming part.

3. The shroud forming process of claim 2 wherein, Step S11 further comprises the following steps: Step S111: according to the force feedback of the force feedback member, it is judged whether the pressure M borne by the second forming part is greater than the preset force N of the force feedback member; when M is greater than N, the second forming part stops moving downwards, and alarm processing is performed; when M is less than or equal to N, the second forming part continues to press downwards until the first forming part is in the closed die state.

4. The orifice forming process of claim 1 wherein, Step S20 comprises the following steps: Step S21: the material clamped by the catheter clamping assembly is inserted into the forming cavity along the axial direction of the mandrel by the feeding driving assembly; Step S22: when the heating part heats the forming cavity to hot melt the material, the feeding part continuously moves the clamped material to the forming cavity.

5. The orifice forming process of claim 1 wherein, Step S30 further comprises the following steps: Step S31: the second forming part is driven to move away from the first forming part along the axial direction of the mandrel by the insertion driving mechanism to switch to the open die state, so as to take out the hot tip catheter.

6. A mold clamping mold comprising a first molding section, a second molding section, a core rod, and a heating section, characterized by The first forming part has a moving channel, the mandrel is connected to the second forming part and penetrates through the first forming part along the moving channel, and the first forming part and the second forming part are relatively slidably superposed along the axial direction of the mandrel to switch between the closed die state and the open die state; In the closed die state, the second forming part and the first forming part abut against each other to form a forming cavity communicated with the moving channel, so that the material sleeved on the mandrel is inserted into the forming cavity through the moving channel; The heating part is arranged to heat the material in the forming cavity to form a hot tip part of the hot tip catheter in the forming cavity; In the open die state, the second forming part and the first forming part are separated from each other to open the forming cavity to take out the hot tip catheter.

7. The matched mold of claim 6, wherein, The first forming part has a first forming cavity, and the second forming part has a second forming cavity corresponding to the first forming cavity, and the first forming cavity and the second forming cavity are closed to each other in the closed die state to form the forming cavity.

8. The matched mold of claim 7, wherein, The first forming part has a guide surface extending to the first forming cavity, and the second forming part has a matching surface extending to the second forming cavity, and in the clamped state, the guide surface and the matching surface are in sliding fit to close the first forming cavity and the second forming cavity to form the forming cavity.

9. The matched mold of claim 6, wherein, The first forming part has a first forming cavity away from the second forming part and a second forming cavity close to the second forming part, and the second forming cavity and the first forming cavity are in communication with each other, and the second forming part has a cover surface facing the first forming part, and the cover surface covers the second forming cavity to form the forming cavity.

10. The mold as claimed in claim 7 or 9, wherein The first forming cavity extends to the moving channel in the direction of the mandrel axis from the second forming cavity; and the second forming cavity extends in the direction of the mandrel axis with the same diameter.

11. A nozzle forming apparatus comprising an insertion portion, a feeding portion, and a fixing portion, characterized by The clamped mold also comprises the first forming part, the insertion part, and the feeding part as claimed in any one of claims 6 to 10, and the first forming part, the insertion part, and the feeding part are arranged on the fixed part; The insertion part is drivingly connected with the second forming part to drive the mandrel along the moving channel through the first forming part; The feeding part comprises a feeding driving assembly and a guide tube clamping assembly arranged on the feeding driving assembly; the guide tube clamping assembly drives the material clamped by the guide tube clamping assembly to insert into the forming cavity along the direction of the mandrel axis under the driving of the feeding driving assembly.

12. The tip forming apparatus of claim 11, wherein The insertion part further comprises a mandrel guide assembly, and the mandrel guide assembly comprises a guide driving mechanism arranged on the fixed part, a mandrel clamping driving mechanism drivingly connected with the guide driving mechanism, and a mandrel guide member drivingly connected with the mandrel clamping driving mechanism; The guide driving mechanism can drive the mandrel clamping driving mechanism to approach or move away from the mandrel arranged on the clamped mold, so that the mandrel guide member is driven by the mandrel clamping driving mechanism to restrict the mandrel when the mandrel clamping driving mechanism approaches the mandrel.

13. The tip forming apparatus of claim 11, wherein The guide tube clamping assembly comprises a guide tube clamping driving mechanism and a guide tube clamping member, and the guide tube clamping driving mechanism drives the guide tube clamping member to clamp the material.

14. The orifice forming apparatus of claim 13 wherein, The feeding part comprises a guide tube supporting assembly, and the guide tube supporting assembly comprises a guide tube supporting driving mechanism arranged on the feeding driving assembly and a guide tube supporting member drivingly connected with the guide tube supporting driving mechanism, and the guide tube supporting driving mechanism can drive the guide tube supporting member to approach or move away from the material clamped by the guide tube clamping member, so that the guide tube supporting member supports the material when the guide tube supporting member approaches the material.

15. The tip forming apparatus of claim 11 wherein, The insertion part further comprises an insertion driving mechanism, and the insertion driving mechanism is drivingly connected with the second forming part to drive the second forming part to approach or move away from the first forming part to form the forming cavity when the second forming part is attached to the first forming part.

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