Injection mold for catheter round cover that is easy to demould

Abstract

The invention discloses an injection mold for a catheter round cover which is easy to demould, comprising a movable mold assembly, a sliding mold core, a fixed mold core and a sliding rod. The movable mold assembly comprises a fixed mold core and a molding boss. The molding boss is arranged on the fixed mold core, and the sliding mold core slides on the fixed mold core. When the sliding mold core slides close to the molding boss, a molding cavity is formed between the sliding mold core and the molding boss. The molding cavity is used to mold a cover body of the catheter round cover. When the sliding mold core slides away from the molding boss, the cover body is separated from the sliding mold core and stays on the molding boss, so that the cover body is easy to demould, thereby improving the demoulding rate of the catheter round cover. When the fixed mold core is buckled on the fixed mold core, a pipeline cavity is formed between the fixed mold core and the fixed mold core. The pipeline cavity is used to mold a catheter of the catheter round cover. The sliding rod is accommodated in the pipeline cavity, and the sliding rod abuts against the molding boss. During demoulding, the catheter stays on the fixed mold core, thereby preventing the catheter from being deformed, and effectively improving the molding quality of the catheter round cover.

Description

Technical Field

[0001] The invention relates to the technical field of injection molds, in particular to an injection mold for a catheter round cover which is easy to demould. Background Art

[0002] Injection molds are used to mold plastic products. The screw of the injection molding machine squeezes the molten plastic into the cavity of the injection mold, thereby molding the plastic product in the cavity.

[0003] See also Figure 1 The invention discloses a conduit round cover 10 for a water pump. The conduit round cover 10 comprises a cover body 11 and a conduit 12. The conduit 12 is arranged on the cover body 11. The cover body 11 is provided with a bottom groove 11a. The conduit 12 is provided with a round hole 12a. The round hole 12a is connected with the bottom groove 11a. For the conduit round cover 10, a conventional injection molding method is to buckle a movable mold and a fixed mold together, arrange a boss on the movable mold, let the boss mold the bottom groove 11a of the cover body 11, and the fixed mold molds the outer surface of the cover body 11. The connecting part of the cover body 11 and the conduit 12 and the conduit 12 are molded by a side sliding structure.

[0004] However, in the conventional injection molding method, since the bottom of the outer wall of the cover body 11 is in an outwardly flared shape, the groove on the fixed mold for molding the outer surface of the cover body 11 needs to be opened relatively deep, so that the outer surface of the cover body 11 can be molded. However, if the groove on the fixed mold is opened too deep, it is easy to cause the injection-molded catheter round cover 10 to stay in the groove of the fixed mold when the fixed mold is separated from the movable mold, which makes it difficult to demold the catheter round cover 10, thereby increasing the production difficulty of the catheter round cover 10; further, since the catheter 12 is too long, when the side sliding structure withdraws from the catheter 12, the catheter 12 is prone to deformation, which leads to a decrease in the quality of the molded catheter round cover 10. Summary of the invention

[0005] The purpose of the present invention is to overcome the shortcomings of the prior art and provide a catheter round cover injection mold that is easy to demold, which can facilitate the demolding of the injection-molded catheter round cover, thereby improving the demolding rate of the catheter round cover, and the catheter will not be deformed, effectively improving the molding quality of the catheter round cover.

[0006] The objective of the present invention is achieved through the following technical solutions:

[0007] A catheter round cover injection mold that is easy to demould, comprising:

[0008] A movable mold assembly, the movable mold assembly comprising a fixed mold core and a molding boss, the fixed mold core is provided with a sliding groove, and the molding boss is accommodated in the sliding groove;

[0009] A sliding mold core, wherein the sliding mold core is slidably disposed in the sliding groove, a molding groove and a plastic channel are provided on the sliding mold core, and the plastic channel is communicated with the molding groove, and a first pipeline groove is further provided on the fixed mold core, and the first pipeline groove is communicated with the plastic channel;

[0010] A fixed mold core, the fixed mold core is buckled on the fixed mold core, a second pipeline groove is opened on the fixed mold core, and the second pipeline groove is connected with the first pipeline groove;

[0011] A slide rod is slidably disposed in the first pipeline groove.

[0012] In one of the embodiments, the catheter round cover injection mold that is easy to demold further includes a support and a slider, the support is arranged on the fixed mold core, the slider is slidably arranged on the support, and the slider is connected to the sliding mold core.

[0013] In one embodiment, the catheter round cover injection mold that is easy to demold also includes a side sliding component, and the side sliding component includes a driving cylinder and a sliding block. The driving cylinder is arranged on the support, and the sliding block is arranged on the output shaft of the driving cylinder, and the sliding block is connected to the sliding rod.

[0014] In one embodiment, two sliders are provided, and the two sliders are spaced apart and arranged on the support.

[0015] In one embodiment, two sliding mold cores are provided, and the two sliding mold cores are connected to the two sliding blocks respectively and one by one.

[0016] In one of the embodiments, the catheter round cover injection mold that is easy to demold further includes a fixing seat, and the fixing seat is arranged on the fixed mold core.

[0017] In one of the embodiments, the catheter round cover injection mold that is easy to demold further includes a pushing block, and the pushing block is arranged on the fixing seat.

[0018] In one embodiment, two pushing blocks are provided, and the two pushing blocks are spaced apart and arranged on the fixing seat.

[0019] In one of the embodiments, a glue inlet channel is also provided on the fixed mold core, and the glue inlet channel is connected to the plastic channel.

[0020] In one of the embodiments, a cooling channel is further provided on the sliding mold core, and the cooling channel is used to flow cold water to cool the sliding mold core.

[0021] Compared with the prior art, the present invention has at least the following advantages:

[0022] The invention discloses an injection mold for a catheter round cover that is easy to demould, comprising a movable mold assembly, a sliding mold core, a fixed mold core and a sliding rod. The movable mold assembly comprises a fixed mold core and a molding boss. The fixed mold core is provided with a sliding groove and a first pipeline groove. The molding boss is accommodated in the sliding groove. The sliding mold core is provided with a molding groove. The sliding mold core is slidably arranged in the sliding groove. When the sliding mold core slides close to the molding boss, the inner side wall of the molding groove and the outer side wall of the molding boss jointly form a molding cavity. The first pipeline groove is connected to the molding cavity. The molding cavity is used to mold the cover body of the catheter round cover. The sliding mold core slides away from the molding boss. When leaving the forming boss, the catheter round cover will be separated from the forming groove, so that the catheter round cover can be easily demolded, thereby improving the demolding rate of the catheter round cover, and the fixed mold core is buckled on the fixed mold core, and a second pipeline groove is opened on the fixed mold core. The inner side wall of the second pipeline groove and the inner side wall of the first pipeline groove together form a pipeline cavity, and the pipeline cavity is used to form the catheter of the catheter round cover. The sliding rod is accommodated in the pipeline cavity, and the sliding rod is abutted against the forming boss. When demolding, the catheter stays in the first pipeline groove, thereby preventing the catheter from being deformed, and effectively improving the molding quality of the catheter round cover. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0024] Figure 1 It is a structural schematic diagram of a conduit round cover for a water pump;

[0025] Figure 2 It is a schematic structural diagram of an injection mold for a catheter round cover that is easy to demould according to one embodiment of the present invention;

[0026] Figure 3 for Figure 2 The schematic diagram of the structure of the movable mold assembly of the catheter round cover injection mold which is easy to demould is shown;

[0027] Figure 4 for Figure 2 The schematic diagram of the structure of the sliding mold core of the catheter round cover injection mold which is easy to demould is shown;

[0028] Figure 5 for Figure 2 The structural schematic diagram of the fixed mold core of the catheter round cover injection mold which is easy to demould is shown;

[0029] Figure 6 for Figure 2The schematic diagram of the structure of the fixed mold core and the cooling spiral tube of the catheter round cover injection mold which is easy to demould is shown;

[0030] Figure 7 for Figure 2 A schematic structural diagram of a fixed mold core of a catheter round cover injection mold for easy demoulding shown in another perspective;

[0031] Figure 8 for Figure 2 The schematic diagram of the structure of the fixed mold core and mold core cover plate of the injection mold for the catheter round cover which is easy to demould is shown;

[0032] Fig. 9 for Figure 2 The schematic diagram of the structure of the demoulding component of the injection mold for the catheter round cover which is easy to demould is shown;

[0033] Fig.10 for Fig. 9 A schematic diagram of the partial structure of the demoulding component is shown. DETAILED DESCRIPTION

[0034] In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the relevant drawings. The preferred embodiments of the present invention are given in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thoroughly understood.

[0035] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method.

[0036] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0037] It should be noted that the expressions used herein regarding an element being “connected” to another element also mean that an element is “communicated” to another element, and fluids can be exchanged and communicated between the two elements.

[0038] See also Figure 2A catheter round cover injection mold 20 that is easy to demold, includes a movable mold assembly 100, a sliding mold core 200, a fixed mold core 300 and a sliding rod 400, the sliding mold core 200 is buckled on the movable mold assembly 100, the sliding mold core 200 is slidably set on the movable mold assembly 100, the fixed mold core 300, the sliding mold core 200 and the movable mold assembly 100 together form a cavity for injection molding a catheter round cover 10, and the sliding rod 400 is used to slide on the movable mold assembly 100 so that the sliding rod 400 is inserted into the cavity, thereby forming the circular hole 12a of the catheter 12 of the catheter round cover 10.

[0039] Please participate Figure 2 and Figure 3 The movable mold assembly 100 includes a fixed mold core 110 and a molding boss 120 . The fixed mold core 110 is provided with a sliding groove 111 , and the molding boss 120 is accommodated in the sliding groove 111 . It should be noted that a sliding groove 111 is provided at the middle position of the fixed mold core 110, and the sliding groove 111 is used to allow the sliding mold core 200 to slide. In one embodiment, a demolding groove is provided at the bottom of the sliding groove 111, and the movable mold assembly 100 also includes a demolding module, which is accommodated in the demolding groove, and a avoidance through hole is provided at the middle position of the demolding fast, and the molding boss 120 passes through the avoidance through hole, and the molding boss 120 is installed and fixed together with the fixed mold core 110, so that the demolding module can slide on the molding boss 120. It should be noted that the molding boss 120 is used to form the bottom groove 11a of the cover body 11 of the catheter round cover 10. Therefore, when the demolding module moves upward along the molding boss 120, the demolding module can push the molded catheter round cover 10, so that the catheter round cover 10 can be detached from the molding boss 120 to achieve the demolding operation.

[0040] See also Figure 2 , Figure 3 and Figure 4The sliding mold 200 is slidably disposed in the sliding groove 111. The sliding mold 200 is provided with a molding groove 210 and a plastic channel 220. The plastic channel 220 is connected to the molding groove 210. The fixed mold 110 is also provided with a first pipeline groove 112. The first pipeline groove 112 is connected to the molding groove 210. It should be noted that the sliding mold 200 slides in the sliding groove 111. When the sliding mold 200 slides close to the molding boss 120, the inner wall of the molding groove 210 and the outer wall of the molding boss 120 together form a molding cavity. The molding cavity is used for injection molding the cover body 11 of the catheter round cover 10. Since the plastic channel 220 on the sliding mold 200 is connected to the molding groove 210, that is, the plastic channel 220 is connected to the molding cavity, so that after the molten plastic enters from the plastic channel 220, it will flow into the molding cavity, so that The cover body 11 is formed in the molding cavity. Since the first conduit groove 112 is connected to the molding groove 210, the plastic will continue to enter the first conduit groove 112 to form the conduit 12 of the conduit round cover 10. After the injection molding is completed, the sliding mold core 200 is slid away from the molding boss 120, so that the cover body 11 stays on the molding boss 120, and the cover body 11 is separated from the molding groove 210, thereby realizing the demolding operation of the cover body 11. In this way, the sliding mold core 200 is used to slide in the sliding groove 111, so that the cover body 11 can be easily demolded.

[0041] See also Figure 2 and Figure 5The fixed mold core 300 is buckled on the fixed mold core 110, and a second pipeline groove 310 is provided on the fixed mold core 300, and the second pipeline groove 310 is connected to the first pipeline groove 112. It should be noted that when the fixed mold core 300 and the fixed mold core 110 are buckled together, the second pipeline groove 310 is connected to the first pipeline groove 112, and the inner side wall of the second pipeline groove 310 and the inner side wall of the first pipeline groove 112 together form a pipeline cavity, which is connected to the molding cavity. The pipeline cavity is used to mold the catheter 12 of the catheter round cover 10. In one embodiment, a avoidance groove is also provided on the fixed mold core 300. When the fixed mold core 300 and the fixed mold core 110 are buckled together, the avoidance groove The groove is used to avoid the sliding mold core 200, and a glue inlet hole is opened at the bottom of the avoidance groove. When the fixed mold core 300 is buckled on the fixed mold core 110, the glue inlet hole is connected with the plastic channel 220. In this way, the molten plastic can enter the plastic channel 220 from the glue inlet hole, so that the molten plastic finally enters the molding cavity and the pipeline cavity to form the cover body 11 and the catheter 12 of the catheter round cover 10. After the injection molding is completed, the fixed mold core 300 is separated from the fixed mold core 110, and the formed The conduit 12 will remain in the first conduit groove 112, so that the conduit 12 will not be deformed, thereby effectively improving the molding quality of the conduit 12. Then, the sliding mold core 200 slides away from the molding boss 120, and the injection molded cover body 11 remains on the molding boss 120, and the cover body 11 is separated from the molding groove 210, so that the conduit round cover 10 stays on the molding boss 120 and the fixed mold core 110. Then, the stripping module moves along the molding boss 120 and pushes the conduit round cover 10. The catheter round cover 10 is separated from the forming boss 120 to realize demolding of the catheter round cover 10. In this way, the sliding mold core 200 is used to slide in the sliding groove 111 to realize molding and demolding of the cover body 11 of the catheter round cover 10. The fixed mold core 300 is engaged with the fixed mold core 110 to realize molding and demolding of the catheter 12 of the catheter round cover 10, so that the cover body 11 can be easily demolded and the catheter 12 will not be deformed, thereby effectively improving the molding quality of the catheter round cover 10.

[0042] Please refer again Figure 2, the slide bar 400 is slidably disposed in the first pipeline groove 112. It should be noted that, since in the conduit round cover 10, the bottom groove 11a on the cover body 11 and the round hole 12a on the conduit 12 are connected, the slide bar 400 is slidably disposed in the first pipeline groove 112, and the slide bar 400 is abutted against the molding boss 120. In this way, when the molten plastic flows into the molding cavity and the conduit cavity, the bottom groove 11a of the cover body 11 is formed at the molding boss 120, and the slide bar 400 forms the round hole 12a of the conduit 12. In this way, the bottom groove 11a and the round hole 12a can be connected. When the injection molding is completed, the fixed mold core 300 moves away from the fixed mold core 110, the sliding mold core 200 slides away from the molding boss 120, the sliding rod 400 slides away from the molding boss 120, and then the stripping module slides on the molding boss 120 to push the molded catheter round cover 10, so that the catheter round cover 10 can be easily demolded, and the first pipe groove 112 on the fixed mold core 110 protects the catheter 12, effectively preventing the catheter 12 from deformation, thereby improving the molding quality of the catheter round cover 10.

[0043] Please refer again Figure 2 The injection mold 20 for the catheter round cover that is easy to demould also includes a support 500 and a slider 600. The support 500 is arranged on the fixed mold core 110, and the slider 600 is slidably arranged on the support 500, and the slider 600 is connected to the sliding mold core 200. It should be noted that the sliding mold core 200 is used to form the cover body 11. Since it is difficult to control the sliding mold core 200, the slider 600 is fixed to the sliding mold core 200 and the slider 600 is allowed to slide on the support 500, so that the slider 600 drives the sliding mold core 200 to slide in the sliding groove 111. In this way, the sliding mold core 200 can be better controlled. The support 500 is used to be installed on the moving arm of the injection molding machine, and the electric support 500 of the injection molding machine is used to move, so that the fixed mold core 110 can be engaged or separated with the fixed mold core 300.

[0044] Please refer again Figure 2The catheter round cover injection mold 20 that is easy to demold also includes a side sliding component 700, which includes a driving cylinder 710 and a sliding block 720. The driving cylinder 710 is arranged on the support 500, and the sliding block 720 is arranged on the output shaft of the driving cylinder 710, and the sliding block 720 is connected to the sliding rod 400. It should be noted that, in the catheter round cover 10, the circular hole 12a on the catheter 12 is formed by the slide bar 400. Specifically, when the slide bar 400 is slidably accommodated in the first pipeline groove 112, and then the molten plastic is injected into the molding cavity and the pipeline cavity, the slide bar 400 can form a circular hole 12a on the catheter 12. When the catheter round cover 10 needs to be demoulded, the slide bar 400 needs to be pulled out of the circular hole 12a. By installing and fixing the slide bar 400 on the sliding block 720, and then connecting the output end of the driving cylinder 710 to the sliding block 720, when the output end of the driving cylinder 710 is driven, the sliding block 720 is connected to the output end of the driving cylinder 710. When the shaft retracts, it can drive the sliding block 720, thereby driving the sliding rod 400 to be withdrawn from the circular hole 12a, so that the catheter round cover 10 can be easily demolded. In one embodiment, a sliding groove is opened on the support 500, and the sliding block 720 slides in the sliding groove. The set sliding groove can limit the sliding block 720, so that the sliding block 720 can only approach or move away from the forming boss 120 under the drive of the driving cylinder 710, so that the sliding rod 400 can only approach or move away from the forming boss 120, which effectively improves the sliding stability of the sliding rod 400, so that the quality of the catheter 12 of the formed catheter round cover 10 is better.

[0045] Please refer again Figure 2, there are two sliders 600, and the two sliders 600 are arranged on the support 500 at intervals. There are two sliding molds 200, and the two sliding molds 200 are connected to the two sliders 600 one by one. It should be noted that for the catheter round cover 10, the catheter 12 is arranged on one side of the cover body 11, so it is necessary to let the two sliding molds 200 slide in the sliding groove 111 of the fixed mold 110. When the two sliding molds 200 move toward each other and abut against each other, the inner side walls of the two molding grooves 210 are connected together. The inner side walls of the two molding grooves 210 are used to mold the outer surface of the cover body 11. The inner side walls of the two molding grooves 210 will form a molding cavity for molding the cover body 11 together with the outer side walls of the molding boss 120. When the plastic in the molding cavity is cooled, the two sliding molds 200 are separated, and the injection molded cover body 11 remains on the molding boss 120. The two molding grooves 210 are separated from the outer side walls of the cover body 11, so that the cover The body 11 is demolded from the molding groove 210 of the sliding mold core 200, so the catheter round cover 10 can be easily demolded, and two sliders 600 are arranged to be connected to the two sliding mold cores 200 respectively, and when the two sliders 600 slide, the two sliding mold cores 200 can be driven to slide. Specifically, when the two sliders 600 move toward each other, the two sliding mold cores 200 will be driven to slide close to the molding boss 120, and the two sliding mold cores 200 will eventually abut against each other. When the two sliders 600 slide away from each other, the two sliding mold cores 200 will be driven away from the molding boss 120. The two sliding mold cores 200 are driven by the sliding of the two sliders 600, so that the two sliding mold cores 200 can be better controlled.

[0046] Please refer again Figure 2 The catheter round cover injection mold 20 for easy demoulding also includes a fixing seat 800, which is arranged on the fixed mold core 300. It should be noted that the fixed mold core 300 is used to be engaged with or separated from the fixed mold core 110. Since the volume of the fixed mold core 300 is relatively small, it is difficult to ensure the stability of the fixed mold core 300 when engaging with the fixed mold core 110. Therefore, the fixing seat 800 is arranged on the fixed mold core 300, and the fixing seat 800 is driven to achieve the purpose of controlling the fixed mold core 300. On the one hand, the fixed mold core 300 can be better protected, and on the other hand, the stability of the fixed mold core 300 when engaging with the fixed mold core 110 can be improved, thereby preventing the fixed mold core 110 from being damaged.

[0047] See also Figure 2The catheter round cover injection mold 20 for easy demoulding also includes a push block 900, which is arranged on the fixed seat 800. It should be noted that the slider 600 needs to slide on the support 500 to drive the sliding mold core 200 to approach or move away from the molding boss 120. The push block 900 is installed on the fixed seat 800. When the fixed seat 800 and the support 500 are close to each other so that the fixed mold core 300 and the fixed mold core 110 are engaged, the fixed seat 800 will drive the push block 900 to approach the support 500, and will cause the push block 900 to push the slider 600. In one embodiment, the slider 600 is provided with an inclined surface, and the push block 900 is also provided with an inclined surface. An inclined surface is provided. When the inclined surface of the push block 900 pushes the inclined surface of the slider 600, the slider 600 obtains a component force in the horizontal direction due to the inclined surface structure, so that the slider 600 can slide in the horizontal direction, that is, the slider 600 can slide close to the molding boss 120. In this way, the fixed seat 800 is driven to move by the injection molding machine, so that the slider 600 can be close to or away from the molding boss 120, eliminating the need to add a driving source for the slider 600, thereby making the structure of the mold more compact.

[0048] Please refer again Figure 2 , two push blocks 900 are provided, and the two push blocks 900 are arranged on the fixed seat 800 at intervals. It should be noted that since two sliders 600 are provided, two push blocks 900 need to be provided on the fixed seat 800 accordingly, so that when the fixed seat 800 is close to the support 500, the two push blocks 900 can push against the two sliders 600 one by one.

[0049] Please refer again Figure 2 and Figure 5 The fixed mold core 300 is also provided with a glue inlet channel 320, which is connected to the plastic channel 220. It should be noted that when the fixed mold core 300 is engaged with the fixed mold core 110, the molten plastic enters the plastic channel 220 from the glue inlet channel 320 of the fixed mold core 300, and then flows into the molding groove 210 from the plastic channel 220 to form the catheter round cover 10.

[0050] Please refer again Figure 4The sliding mold core 200 is also provided with a cooling channel 230, through which cold water flows to cool the sliding mold core 200. It should be noted that, since the temperature of the molten plastic is relatively high, after the molten plastic is injected into the molding cavity, in order to quickly cool down the molded catheter round cover 10, a cooling channel 230 is provided on the sliding mold core 200, and cold water is introduced into the cooling channel 230, thereby utilizing the characteristic of cold water having a large specific heat capacity to take away the heat on the sliding mold core 200, so as to achieve the purpose of quickly cooling the sliding mold core 200, thereby enabling the catheter round cover 10 to be demoulded more quickly, and effectively improving the production speed of the catheter round cover 10.

[0051] See also Figure 6 The fixed mold core 300 is also provided with a cold water trough 330. The catheter round cover injection mold 20 for easy demolding also includes a cooling spiral tube 1000. The cooling spiral tube 1000 is provided with a water inlet hole 1100 and a spiral groove 1200. The spiral groove 1200 is connected to the water inlet hole 1100. The cooling spiral tube 1000 is accommodated in the cold water trough 330. It should be noted that during the injection molding process, cooling the injection mold is an important part of the injection molding process. If the mold is not cooled down enough, it is easy to cause defects in the plastic parts formed in the mold. For example, due to uneven cooling in the mold, the temperature of the plastic parts in the molding cavity of the mold is inconsistent, which in turn causes inconsistent stress in some weak parts or thinner ribs of the plastic parts, which in turn causes the molded plastic parts to deform. The surface of the plastic parts may even be burned due to the high temperature of the mold, causing patterns on the surface of the plastic parts, thereby reducing the quality of the plastic parts. Moreover, for the injection molding industry, improving the efficiency of plastic injection molding is a goal that technicians in the field have always pursued. After the mold has molded the plastic parts, accelerating the cooling of the mold so that the plastic parts can be quickly cooled and demolded is the main research direction for technicians in this field to improve the efficiency of mold injection. Figure 6The outer surface of the cooling spiral tube 1000 shown in the figure is provided with a spiral groove, namely, a spiral groove 1200, and a water inlet hole 1100 is provided at the center of the cooling spiral tube 1000. At the bottom of the cooling spiral tube 1000, the water inlet hole 1100 and the spiral groove 1200 are connected by a groove provided on the tube wall of the cooling spiral tube 1000. It should be noted that the cold water groove 330 does not penetrate the fixed mold core 300, and the distance between the bottom of the cold water groove 330 and the cavity at the bottom of the fixed mold core 300 is maintained at 2c. m~3cm, then apply sealing glue on the outer surface of the cooling spiral tube 1000, and then insert the cooling spiral tube 1000 into the cold water tank 330, and make the bottom of the cooling spiral tube 1000 abut against the bottom of the cold water tank 330, so that when cold water is poured into the water inlet through hole 1100 on the cooling spiral tube 1000, the cold water will enter the bottom of the cooling spiral tube 1000 along the water inlet through hole 1100, and then the cold water will enter the spiral groove along the connection between the water inlet through hole 1100 and the spiral groove 1200 1200 is located at the end at the bottom of the cold water tank 330, and then the cold water will flow along the spiral groove 1200 from the bottom of the cold water tank 330 to the top of the cold water tank 330, and then the cold water will flow back to the external cooling system, and then the cooled cold water will be sent to the water inlet through hole 1100, so that a cycle of cold water cooling is realized. By setting the spiral groove 1200, the residence time of the cold water on the fixed mold core 300 can be increased, so that more heat on the bottom mold core 300 can be taken away, so that the fixed mold core 300 can be cooled faster, and the cooling process can be carried out. In order to enable the plastic parts to be cooled quickly to achieve demolding of the plastic parts, it should be noted that the cooling spiral tube 1000 can be changed in size according to actual conditions, and multiple cold water grooves 330 can be opened on the fixed mold core 300, so that the cold water grooves 330 can be evenly distributed above the cavity of the fixed mold core 300, so that the temperature of the cavity of the fixed mold core 300 can be steadily reduced, thereby effectively preventing the deformation of the plastic parts due to the temperature imbalance of various parts of the fixed mold core 300, thereby effectively improving the injection molding production efficiency of plastic parts.

[0052] See also Figure 7The fixed mold core 300 is divided into two halves from the middle. In one of the halves of the fixed mold core 300, a water flow groove 340, a first through hole 350 and a second through hole 360 ​​are provided on the side wall of the half body. The first through hole 350 and the second through hole 360 ​​are connected inside the half body. In one embodiment, two inclined holes are drilled on the side wall of the half body by a drill bit, and the two inclined holes are connected inside the half body. In this way, the purpose of connecting the first through hole 350 and the second through hole 360 ​​can be achieved, and the second through hole 360 ​​is connected to the water flow groove 340. Then, a plurality of first through holes 350 and a plurality of second through holes 360 are provided on the side wall of the half body. The plurality of first through holes 350 are connected to the plurality of second through holes 360 one by one, and the plurality of first through holes 350 are arranged at intervals, and the plurality of second through holes 360 are arranged at intervals. Then, for the second half of the fixed mold core 300, the corresponding holes on the side wall Correspondingly, a water flow trough 340, a plurality of first through holes 350 and a plurality of second through holes 360 are opened, and then the two halves of the fixed mold core 300 are buckled together to form a complete fixed mold core 300. In this way, the inner side walls of the water flow trough 340 of the two halves will form a water inlet, and the first through holes 350 and the second through holes 360 will form a spiral flow trough, and the bottom of the water inlet will be connected with the flow trough. In this way, when cold water flows into the water inlet, the cold water will flow from the bottom of the cold water channel into the flow trough, and then flow through the flow trough to the external cooling equipment, and then flow back to the water inlet to maintain circulation. By directly opening a cold water channel in the fixed mold core 300, the cold water can directly contact the mold, so that it can better take away the temperature of the mold, thereby improving the cooling effect on the mold and accelerating the cooling speed of the mold, so that the internal plastic parts can be cooled faster and demolded, thereby accelerating the efficiency of the injection molding process.

[0053] See also Figure 8A spiral water channel 370 is provided on the surface of the fixed mold core 300. The catheter round cover injection mold 20 for easy demoulding also includes a mold core cover plate 2000. The mold core cover plate 2000 is provided with a water inlet hole 2100 and a water outlet hole 2200. The mold core cover plate 2000 is arranged on the fixed mold core 300. The two ends of the water channel 370 are respectively connected to the water inlet hole 2100 and the water outlet hole 2200. It should be noted that the curvature and direction of the water channel 370 can be changed according to actual conditions. Thereby, the fixed mold core 300 can be cooled as a whole. Specifically, cold water flows into the water channel 370 from the water inlet hole 2100 of the mold core cover plate 2000, and then the cold water flows through the water channel 370 and finally flows back to the external water cooling device from the water outlet hole 2200. Then, the cooled cold water is reconnected to the water inlet hole 2100 to realize the cold water circulation through the fixed mold core 300, so that the fixed mold core 300 is cooled. Since the water channel 370 is laid on the fixed mold core 300, the temperature of the fixed mold core 300 is increased. In order to increase the range of cold water flow, thereby improving the heat absorption capacity of cold water, and then allowing the mold to be quickly cooled down, so that the plastic parts in the mold can be quickly cooled down to achieve demolding, it should be noted that in order to prevent the cold water in the water channel 370 from overflowing from the gap between the fixed mold core 300 and the mold core cover plate 200, resulting in a shortened path for the cold water to flow, thereby causing the cold water to stay on the fixed mold core 300 for too short a time, thereby reducing the cooling effect on the mold, therefore, the surface of the fixed mold core 300 is coated with The mold core cover 2000 is coated with glue so that it can fit tightly with the fixed mold core 300, thereby effectively preventing cold water from overflowing from the gap between the mold core cover 2000 and the fixed mold core 300, thereby ensuring that the cold water stays on the fixed mold core 300 long enough, thereby effectively ensuring the cooling effect of the cold water on the mold, accelerating the cooling speed of the mold, and allowing the plastic parts inside the mold to be quickly cooled and demolded, greatly improving the efficiency of the injection molding process.

[0054] See also Fig. 9 and Fig.10The catheter round cover injection mold 20 for easy demoulding also includes a demoulding assembly 3000, which includes a control member 3100, a first demoulding member 3200, a second demoulding member 3300 and a locking post 3400. The first demoulding member 3200 is slidably disposed on the fixed mold core 110, the locking post 3400 is disposed on the first demoulding member 3200, and the second demoulding member 3300 is slidably disposed on the locking post 3400. The first demoulding member 3200 is used to push the plastic part. The second demolding member 3300 is used to push the plastic part to demold, the locking column 3400 is used to lock the second demolding member 3300, so that after the second demolding member 3300 slides on the locking column 3400 for a certain distance, the second demolding member 3300 will be locked together with the first demolding member 3200, and the control key 3100 is used to control the first demolding member 3200 and the second demolding member 3300, so that the first demolding member 3200 and the second demolding member 3300 are locked together. 00 synchronous motion or asynchronous motion; it should be noted that, for the injection molded plastic parts, a demolding operation is required. Due to the various types of injection molded plastic parts, each injection mold needs to be designed with a matching demolding mechanism to realize the demolding of the plastic parts. This not only increases the resource consumption, but also requires a lot of time to produce the mold, thereby reducing the production efficiency of the mold. The demolding mechanism has a primary demolding and a secondary demolding. The specific number of demolding levels used depends on the specific plastic parts. This will cause the demolding mechanism to be not highly compatible. The above-mentioned demolding assembly 3000 can be compatible with the primary demolding and the secondary demolding in the mold. Specifically, the first demolding member 3200 includes a first ejector column 3210 and a first support plate 3220. The first ejector column 3210 is arranged on the first support plate 3220. The first support plate 3220 is slidably arranged on the fixed mold core 110. The first ejector column 3210 is used to push the plastic part in the mold to demold the plastic part.

[0055] The second demolding member 3300 is located above the first demolding member 3200, and the second demolding member 3300 includes a second push column 3310 and a second support plate 3320. The second push column 3310 is arranged on the second support plate 3320, and the second support plate 3320 is slidably arranged on the fixed mold core 110, and the second support plate 3320 is located above the first support plate 3220. The second push column 3310 is also used to push the plastic parts of the mold to demold the plastic parts. One end of the locking column 3400 is arranged on the first support plate 3220.

[0056] The other end of the locking column 3400 is penetrated by a second support plate 3320, and a clamping platform 3410 is provided on the locking column 3400.

[0057] The control component 3100 includes a control rod 3110, a reversing rod 3120, a clamping rod 3130 and a control spring 3140. The two ends of the control spring 3140 are respectively connected to the second support plate 3320 and the control rod 3110. The reversing rod 3120 is connected to the control rod 3110. A first clamping groove 3221 is provided on the first support plate 3220. A second clamping groove 3321 is provided on the second support plate 3320. The clamping rod 3130 is connected to the reversing rod 3120, and the clamping rod 3130 is accommodated in the first clamping groove 3221 and the second clamping groove 3321.

[0058] It should be noted that when the injection molding machine pushes the control rod 3110, the control rod 3110 moves upward, the control spring 3140 is compressed, and the control rod 3110 pushes the reversing rod 3120 to move, so that the reversing rod 3120 pulls the fastening rod 3130 close to the control rod 3110, and then the fastening rod 3130 is disengaged from the first buckle groove 3221 and the second buckle groove 3321, so that the first support plate 3220 is separated from the second support plate 3320, and then the injection molding machine pushes the second support plate 3320. When the second support plate 3320 moves upward, it will drive the second push column 3310 to move upward. When the second support plate 3320 moves a certain distance , the second support plate 3320 enters the card table 3410 of the locking column 3400, so that the second support plate 3320 drives the first support plate 3220 to move upward, and then drives the first push column 3210 to move upward. In this way, the second push column 3310 and the first push column 3210 move successively, that is, the secondary demoulding operation is realized; when the primary demoulding operation is required, the injection molding machine does not push the control rod 3110, but directly pushes the second support plate 3320. Specifically, since the injection molding machine does not push the control rod 3110, the control rod 3110 is located at the initial position under the restoring elastic force of the control spring 3140, and the control rod 3110 will push the reversing rod 312 0 is pushed to the initial position, so that the reversing rod 3120 pushes the fastening rod 3130 to the initial position, that is, the fastening rod 3130 is accommodated in the first fastening groove 3221 and the second fastening groove 3321, and the fastening rod 3130 fixes the first support plate 3220 and the second support plate 3320 together, so that when the injection molding machine pushes the second support plate 3320, the first support plate 3220 will also move upward following the push, that is, the first support plate 3220 and the second support plate 3320 realize synchronous upward movement, thereby realizing a primary demoulding movement. In this way, the control rod 3110 is used to control the movement of the reversing rod 3120, and then the reversing rod 3120 is used to control the movement of the reversing rod 3120. The movement of the fastening rod 3130 is controlled so that the fastening rod 3130 can be accommodated in the first fastening groove 3221 and the second fastening groove 3321, or separated from the first fastening groove 3221 and the second fastening groove 3321, thereby realizing the control of the fixation or separation of the first pallet 3220 and the second pallet 3320 by the control rod 3110, and then the second pallet 3320 and the first pallet 3220 can be demoulded synchronously or asynchronously, that is, the first-level demoulding and the second-level demoulding are combined, thereby improving the compatibility of the mold demoulding structure, thereby making the mold design more flexible, thereby improving the production efficiency of the mold.

[0059] Compared with the prior art, the present invention has at least the following advantages:

[0060] The invention discloses an injection mold for a catheter round cover that is easy to demold, comprising a movable mold assembly, a sliding mold core, a fixed mold core and a sliding rod. The movable mold assembly comprises a fixed mold core and a molding boss. The fixed mold core is provided with a sliding groove and a first pipeline groove. The molding boss is accommodated in the sliding groove. The sliding mold core is provided with a molding groove. The sliding mold core is slidably arranged in the sliding groove. When the sliding mold core slides close to the molding boss, the inner side wall of the molding groove and the outer side wall of the molding boss jointly form a molding cavity. The first pipeline groove is connected to the molding cavity. The molding cavity is used to mold the cover body of the catheter round cover. The sliding mold core slides away from the molding boss. When the boss is formed, the catheter round cover will be separated from the forming groove, so that the catheter round cover can be easily demolded, thereby improving the demolding rate of the catheter round cover. The fixed mold core is buckled on the fixed mold core, and a second pipeline groove is opened on the fixed mold core. The inner side wall of the second pipeline groove and the inner side wall of the first pipeline groove together form a pipeline cavity, which is used to form the catheter of the catheter round cover. The sliding rod is accommodated in the pipeline cavity, and the sliding rod is abutted against the forming boss. When demolding, the catheter stays in the first pipeline groove, thereby preventing the catheter from being deformed, and effectively improving the molding quality of the catheter round cover.

[0061] The above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A catheter round cover injection mold that is easy to demould, characterized in that: include: A movable mold assembly, the movable mold assembly includes a fixed mold core and a molding boss, the fixed mold core is provided with a sliding groove, the molding boss is accommodated in the sliding groove; a demoulding groove is provided at the bottom of the sliding groove, the movable mold assembly also includes a demoulding module, the demoulding module is accommodated in the demoulding groove, a position avoidance through hole is provided at the middle position of the demoulding fast, the molding boss passes through the position avoidance through hole, and the molding boss is installed and fixed together with the fixed mold core; A sliding mold core, wherein the sliding mold core is slidably disposed in the sliding groove, a molding groove and a plastic channel are provided on the sliding mold core, the plastic channel is communicated with the molding groove, and a first pipeline groove is further provided on the fixed mold core, the first pipeline groove is communicated with the molding groove; A fixed mold core, the fixed mold core is buckled on the fixed mold core, a second pipeline groove is provided on the fixed mold core, and the second pipeline groove is communicated with the first pipeline groove; the fixed mold core is also provided with an avoidance groove, when the fixed mold core and the fixed mold core are buckled together, the avoidance groove is used to avoid the sliding mold core, and a glue inlet through hole is provided at the bottom of the avoidance groove, when the fixed mold core is buckled on the fixed mold core, the glue inlet through hole is communicated with the plastic channel; The fixed mold core is also provided with a cold water tank, and the catheter round cover injection mold for easy demoulding also includes a cooling spiral tube, the cooling spiral tube is provided with a water inlet through hole and a spiral groove, the spiral groove is connected with the water inlet through hole, and the cooling spiral tube is accommodated in the cold water tank; The fixed mold core is divided into two halves from the middle, and in one of the halves of the fixed mold core, a water flow groove, a first through hole and a second through hole are opened on the side wall of the half body, the first through hole and the second through hole are connected inside the half body, the inner side walls of the water flow grooves of the two halves will surround a water inlet, the first through hole and the second through hole will form a spiral flow groove, and the bottom of the water inlet will be connected to the flow groove; The surface of the fixed mold core is provided with a spiral water channel, and the catheter round cover injection mold for easy demoulding also includes a mold core cover plate, which is provided with a water inlet hole and a water outlet hole, and the mold core cover plate is arranged on the fixed mold core, and the two ends of the water channel are respectively connected with the water inlet hole and the water outlet hole; A slide rod is slidably disposed in the first pipeline groove.

2. The easy-to-demold catheter round cover injection mold according to claim 1, characterized in that: The catheter round cover injection mold that is easy to demould also includes a support and a slider, the support is arranged on the fixed mold core, the slider is slidably arranged on the support, and the slider is connected to the sliding mold core.

3. The easy-to-demold catheter round cover injection mold according to claim 2, characterized in that: The catheter round cover injection mold that is easy to demold also includes a side sliding component, which includes a driving cylinder and a sliding block. The driving cylinder is arranged on the support, the sliding block is arranged on the output shaft of the driving cylinder, and the sliding block is connected to the sliding rod.

4. The easy-to-demold catheter round cover injection mold according to claim 2, characterized in that: Two sliding blocks are provided, and the two sliding blocks are arranged on the support at intervals.

5. The easy-to-demold catheter round cover injection mold according to claim 4, characterized in that: The sliding mold cores are provided with two, and the two sliding mold cores are respectively connected with the two sliding blocks in a one-to-one correspondence.

6. The easy-to-demold catheter round cover injection mold according to claim 1, characterized in that: The injection mold for the catheter round cover that is easy to demould also includes a fixing seat, and the fixing seat is arranged on the fixed mold core.

7. The easy-to-demold catheter round cover injection mold according to claim 6, characterized in that: The injection mold for the catheter round cover that is easy to demould also includes a pushing block, and the pushing block is arranged on the fixing seat.

8. The easy-to-demold catheter round cover injection mold according to claim 7, characterized in that: The pushing blocks are provided with two, and the two pushing blocks are arranged on the fixing seat at intervals.

9. The easy-to-demold catheter round cover injection mold according to claim 1, characterized in that: The fixed mold core is also provided with a glue inlet channel, and the glue inlet channel is communicated with the plastic channel.

10. The easy-to-demold catheter round cover injection mold according to claim 1, characterized in that: The sliding mold core is also provided with a cooling channel, and the cooling channel is used for flowing cold water to cool the sliding mold core.

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