JP3001055U - Slide core and its guide rail in injection molding machine - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a slide core having a simple structure by which the structure of the slide core itself is devised so that good lubrication can be achieved between the slide core in an injection molding device and a mold supporting the slide core. thing. [Structure] Used in an injection molding apparatus in which one mold having an angular pin is moved relative to the other mold, and is engaged with the angular pin to be retracted from an injection molded product. In the slide core 30,
A storage portion 33 for filling a lubricant such as grease is formed in the slide core 30, and a guide flow path 37 for the lubricant is formed on at least one sliding contact surface of the slide core 30. A through hole 36 for communicating the flow path 37 and the storage portion 33 is provided, and the slide core 3 is provided.
No. 0, a hose 5 that opens at a surface that does not come into contact with both molds and has a filling port 33a that communicates with the storage portion 33 and that feeds a lubricant or air to the filling port 33a.
It is characterized in that a connecting tool 51 for connecting 0 is provided.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a slide core that constitutes an injection molding device and a guide rail that guides the slide core, and particularly to a slide core and a guide rail that consider good lubrication sliding for a mold that constitutes the injection molding device. It is about.

[0002]

[Prior art]

 In the injection molding apparatus currently used, particularly in an injection molding apparatus that forms a so-called undercut portion on a product, a slide core for forming the undercut portion is used. Generally, the undercut portion is a portion that appears as a recess or a hole in an injection-molded product. In particular, it is difficult to mold only with the mold that constitutes the injection molding device. This is what happens when the direction of movement and the direction of the undercut portion do not match), but what is necessary to form this undercut portion is the slide core.

In general, an injection molding apparatus adopting this slide core injects a slide core engaged with an angular pin by moving the other mold relative to one mold having an angular pin. It is configured to be retracted from the molded product. In other words, the slide core in this type of injection molding device always slides with respect to one of the molds when opening and closing the mold forming the injection molding device. Lubrication of the supported mold has become of considerable importance.

The conventional lubrication between the slide core and the mold supporting the slide core was carried out by an operator as necessary while observing the state of the slide core, but mass production of injection-molded products was performed. If so, this inspection work is very troublesome. Not only that, but if this inspection work was forgotten, good lubrication between the slide core and the mold that supported it could not be achieved in some cases. Moreover, in such a conventional injection molding apparatus, in order to perform the inspection work and the lubrication of the slide core, the operation efficiency of the injection molding apparatus was extremely deteriorated. is there.

The above-mentioned problem of lubrication in the slide core is also applicable to the guide rail that guides the lubrication. That is, the slide core is designed for the injection molding machine side, but the guide is specifically performed by the guide rail. Lubrication of the slide core means that the guide rail is used. This is because it is nothing but lubrication. In other words, the supply of the lubricant on the slide core side may be performed instead of the supply on the guide rail side.

Further, in order to reduce the cost of the product molded by the injection molding apparatus, it is becoming possible to operate it unattended even at night. Therefore, a large amount of lubricant is used in the slide core or the guide rail, and there is an increasing demand for automatic supply. In particular, since the slide core is held by the mold as shown in Fig. 1 when the injection molding apparatus adopting the slide core is stopped, the lubricant is used in the mold. There is also a need to supply it at the parts that do not contact.

Therefore, the inventor has made earnest research as to whether good lubrication between such a slide core and a die for supporting the slide core or the guide rail can be achieved by a simple means. It was newly discovered that good lubrication can be performed between the slide core and the die supporting it, or the guide rails, by devising a device that can automatically lubricate the rail itself. Was completed.

[0008]

[Problems to be solved by the device]

 The present invention has been made in view of the above circumstances, and a problem to be solved is to lubricate a slide core and a mold supporting the slide core and a guide rail in a conventional injection molding apparatus. It is deficient.

The object of the present invention is to improve the structure of the slide core or the guide rail itself so that the slide core in the injection molding apparatus and the mold supporting the slide core, or the guide rail can be made excellent. It is to provide a slide core that can be lubricated and a guide rail that guides the slide core with a simple structure.

[0010]

[Means for Solving the Problems]

 In order to solve the above problems, the means adopted by the device according to claim 1 will be described with reference to FIGS. 1 to 7 corresponding to the embodiment. “One mold 10 including an angular pin 11” On the other hand, in the slide core 30 which is used in the injection molding apparatus 100 in which the other mold 20 is relatively moved, and which is engaged with the angular pin 11 and retracted from the injection molded article 40, An accommodating portion 33 for filling a lubricant such as grease is formed in the slide core 30, and a guide flow path 37 for the lubricant is formed on at least one sliding contact surface of the slide core 30. A through hole 36 for communicating the passage 37 and the storage portion 33 is provided, and an opening is formed in the slide core 30 on a surface that does not contact both the molds 10 and 20, and a passage that communicates with the storage portion 33. The slide core 30 is characterized in that a filling port 33a is formed and a connecting member 51 for connecting a hose 50 for feeding a lubricant or air is provided to the filling port 33a.

That is, in the slide core 30 according to the present invention, first, the storage portion 33 for storing the lubricant is formed inside, and the lubricant in the storage portion 33 is guided through the through hole 36. The lubricant leached into the passage 37 is used to ensure good lubrication of the slide core 30 with respect to the other mold 20 constituting the injection molding apparatus 100 by the lubricant leached into the guide passage 37. It was something that I was supposed to do.

Then, in this slide core 30, a filling port 33 a communicating with the storage part 33 is formed while opening at a surface that does not contact both molds 10 and 20. A connection tool 51 for contacting the hose 50 is provided at the mouth 33a. By feeding the lubricant or air from the hose 50 connected to the connection tool 51, the lubricant in the storage section 33 is separated. It is designed so that it can be leached from the through hole 36.

Further, the means adopted by the invention according to claim 2 is the same as in “Injection molding apparatus 100 in which the other mold 20 is relatively moved with respect to one mold 10 including the angular pin 11. In the guide rail 60 for guiding the slide core which is used in the above, and is adapted to be retracted from the injection-molded product 40 by engaging with the angular pin 11, a storage portion for filling the guide rail 60 with a lubricant such as grease. 61, a guide flow path 62 for a lubricant is formed on at least one sliding contact surface of the guide rail 60, and a through hole 63 for communicating the guide flow path 62 and the storage section 61 is provided. In addition, a filling port 61 a that opens to the guide rail 60 on a surface that does not contact the molds 10 and 20 and the slide core and that communicates with the storage section 61. Formed by a guide rail 60 ", characterized in that the connecting device 51 for the hose 50 to connect to feed lubricant or air to the filling opening 61a provided.

[0014]

[Function of the device]

 The slide core 30 according to the invention of claim 1 has the following actions.

First, in the slide core 30 according to the present invention, the other mold supporting the slide core 30 according to the opening / closing operation of the one mold 10 and the other mold 20. 20 slides in the left-right direction in FIG. That is, the angular pin 11 on the side of the one die 10 inserted through the pin insertion hole 32 of the slide core 30 is formed obliquely with respect to the opening / closing operation direction of the one die 10 and the other die 20. Therefore, the slide core 30 is guided to the other mold 20 by the guide by the angular pin 11 and the guide 31 of the slide core 30 to the other mold 20, as shown in FIG. It is positively slid in the direction.

When the slide core 30 slides with respect to the other mold 20, the storage portion 33 of the slide core 30 is filled with a lubricant, and the storage portion 33 passes through the through hole 36. Since it communicates with the guide flow path 37 formed on the outer side surface of the slide core 30, the lubricant in the storage portion 33 seeps out between the slide core 30 and the other mold 20, and the lubrication of both is prevented. It is done. In this case, when the guide flow passage 37 is formed in a curved shape or a zigzag shape that bypasses the entire one side surface of the slide core 30, even if there is only one guide flow passage 37, The entire side surface can be lubricated.

When the lubricant in the guide passage 37 is used to some extent, the lubricant in the storage portion 33 is sequentially supplied. That is, since the slide core 30 itself has a certain amount of heat due to friction with the other mold 20, the lubricant such as grease in the storage portion 33 is in a softened state. Therefore, the lubricant in the storage portion 33 is automatically and sequentially supplied to each of the guide passages 37. When the filling port 33a of the storage portion 33 is closed by the plug 35, the plug 35 can be screwed into the filling port 33a to allow the lubricant in the storage portion 33 to flow into the guide passages 37. Leach positively.

As described above, when the amount of the lubricant in the storage portion 33 becomes low or disappears (the state can be easily measured depending on the usage time of the slide core 30), The lubricant or air is fed from the hose 50 connected to the slide core 30 via the connection tool 51. That is, when the amount of the lubricant in the storage portion 33 becomes low, air is sent from the hose 50 to use the lubricant remaining in the storage portion 33. It leaches out from each through hole 36 to the outside. Of course, the lubricant may be directly supplied from the hose 50.

The above-described supply of the lubricant or air by the hose 50 depends on the state of the injection molding apparatus 100 because the connecting tool 51 is formed on the surface of the slide core 30 which does not come into contact with both the molds 10 and 20. The injection molding apparatus 100 never interferes with the work. Since the slide core 30 slides during the operation of the injection molding device 100, the lubricant or air from the hose 50 should be supplied after the injection molding device 100 is temporarily stopped. .

Of course, if a check valve capable of preventing the lubricant from leaching is provided in the connecting tool 51 when the hose 50 is not connected, the connecting tool 51 can be attached to the slide core 30. In the case of the connector 51 that does not have a check valve, the plug 35 can be used instead of the plug 35 when it is not used.

The same applies to the guide rail 60 that guides the slide core 30, and the slide core 30 does not have the storage portion 33 for the lubricant and the guide flow path 37 that communicates with the storage portion 33. However, the guide rail 60 can sufficiently lubricate the slide core 30 with the lubricant filled in the storage portion 61.

That is, the amount of the lubricant in the storage portion 61 of the guide rail 60 has decreased or has disappeared (the state can be easily measured depending on the usage time of the slide core 30 or the guide rail 60). In this case, the lubricant or the air is fed from the hose 50 connected to the guide rail 60 via the connecting tool 51. That is, when the amount of the lubricant in the storage 61 becomes low, air is sent from the hose 50 in order to use the remaining lubricant in the storage 61. It leaches out to the outside from each through hole 63. Of course, the lubricant may be directly supplied from the hose 50.

[0023]

【Example】

 Next, the present invention will be described in detail with reference to the embodiments shown in the drawings.

1 and 2 are cross-sectional views of an injection molding apparatus 100 that employs a slide core 30 according to an embodiment of the present invention. This injection molding apparatus 100 moves a mold 20 of one mold relative to a mold 10 of the other mold, thereby forming a molded product in a cavity formed by the mold 10 of one mold and the mold 20 of the other mold. In order to form the undercut portion 41, the molded article 40 has an undercut portion 41, as shown in FIGS. 1 and 2. This is the slide core 30 according to the present invention.

One of the molds 10 is always guided in a fixed direction with respect to the other mold 20 inserted in the pin guide portion 13, and a part of the mold 10 guides the guide pin 21. It has angular pins 11 arranged obliquely with respect to the direction. Further, a stop member 12 having a guide surface 12a is fixed to the outer side of the one die 10, and the stop member 12 guides the die 10 when the one die 10 and the other die 20 are closed. The surface 12a pushes a guide surface 38 of each slide core 30 described later to firmly press the undercut forming portion 39 of the slide core 30 toward the other die 20 side.

The other die 20 is relatively moved in a certain direction with respect to the one die 10 while being guided by the guide pin 21 inserted into the pin guide portion 13 on the one die 10 side. An ejector pin 22 for taking out the completed molded product 40 is provided at the substantially central portion thereof. The ejector pin 22 is constructed so as to be capable of being compressed and contracted, and if necessary, protrudes from the other mold 20. The slide core 30 according to the present invention is arranged on the side of the other mold 20.

In the slide core 30 shown below, sliding can be performed not only by the angular pin 11 but also by the spring 70, and the storage portion of this spring 70 is shown in FIG. As shown by the dotted line, it is formed in a portion that does not interfere with the pin insertion hole 32 and the storage portion 33 described later. That is, the spring 70 is used when the undercut forming portion 39 is comparatively small, and the spring 70 is brought into contact with an appropriate portion of the injection molding apparatus 100 to repel the spring 70. The die is used to remove the slide core 30.

The slide core 30 is as shown in FIGS. 3 to 7. The slide core 30 is dovetailed to the other mold 20 side by a guide 31 formed on the side of the slide core 30, and the slide core 30 faces the other mold 20. It is arranged so that it can be moved left and right while the positions in the vertical direction in FIGS. 1 and 2 are defined. That is, the slide core 30 can move in the left-right direction in FIG. 1 with respect to the other die 20, but does not move up and down. Of course, since the slide core 30 is moved by the angular pin 11 on the side of one of the molds 10, the pin insertion hole 32 for inserting the angular pin 11 into the slide core 30 is inserted substantially in the center thereof. The core 30 is formed in a state of being positioned obliquely with respect to the sliding direction.

A storage portion 33 for storing a lubricant such as grease is formed at a position where the slide core 30 does not interfere with the pin insertion hole 32. In this embodiment, a screw portion 34 is formed in the filling port 33a of the storage portion 33, and the plug 35 or the connector 51 is screwed to the screw portion 34. . That is, the plug 35 can be screwed into the screw portion 34 of the storage portion 33 to close the inside of the storage portion 33, and the storage volume of the storage portion 33 can be changed by further screwing the plug 35. I am doing it.

As shown in FIGS. 1 to 3, the filling port 33 a of the storage portion 33 is formed so as to be opened on the surface of the slide core 30 that does not come into contact with the molds 10 and 20. The plug 35 or the connecting tool 51 can be screwed to this regardless of the state of the injection molding apparatus 100. In the slide core 30 shown in FIG. 3, the plug 35 is screwed into the filling port 33a, but the hose 50 is connected to the filling port 33a as shown in FIG. The connection tool 51 for connecting is connected instead of the plug 35.

The connector 51 may be of any type as long as it can connect a hose 50 for supplying a lubricant, air, cooling water, or the like. However, in this embodiment, the hose 50 for air feeding can be connected. If this connecting tool 51 has a check valve for the lubricant, it suffices to attach this connecting tool 51 to the slide core 30 without replacing it with the plug 35. If it does not have the hose 50, the plug 35 may be screwed into the filling port 33a of the storage portion 33 instead of the hose 50.

Further, the guide passage 37 formed on the side surface of the slide core 30 communicates with the storage portion 33 of the slide core 30 through the through hole 36. The guide flow path 37 is formed on the sliding contact surface with respect to the other mold 20, and is formed at least at a place where the frictional force is applied. If necessary, it is formed on the bottom surface of the slide core 30. It may be carried out. In other words, in the slide core 30 of the embodiment, as shown in FIGS. 3 to 6, the guides 31 protruding on both sides of the slide core 30 are independently held for the lubricant on both sides thereof. Each groove 37a is formed, and a through hole 36 communicating with the storage portion 33 is opened in each holding groove 37a.

Further, as shown in FIG. 4, the guide flow path 37 in this embodiment is formed in a zigzag shape that bypasses the entire one side surface of the slide core 30. This is because it is possible to lubricate the entire sliding contact surface of the slide core 30 with one guide flow path 37.

The slide core 30 is guided by a guide surface 12 formed on one side of the mold 10 by a guide surface 38 formed on one side of the slide core 30, and one mold 10 and the other mold 20 are closed. In this case, the undercut forming portion 39 formed on the other side is pushed toward the cavity formed by the one die 10 and the other die 20. Further, the guide flow passages 37 formed on the front surface and the back surface of the slide core 30 are provided with through holes 36 at the center portions of the upper and lower ends thereof and from the right side in the drawing. By forming the through holes 36 in the central portions of the upper and lower ends of the guide passage 37 in this way, the lubricant leaching from the through holes 36 flows evenly up and down the guide passage 37, and The front and back surfaces can be reliably lubricated with a small amount of lubricant.

If a pair of storage parts 33 are formed, these storage parts 33 can be arranged separately to the left and right of the pin insertion hole 32, so that each storage part 33 and the pin insertion hole 32 do not interfere with each other. Of course, the inclination direction of the pin insertion hole 32 can be freely selected. Also, the angular pin 11 is inserted into the pin insertion hole 32 and is in sliding contact therewith. However, if the portion forming the pin insertion hole 32 is thin, there is a high possibility that it will be damaged. By arranging the portions 33 on the left and right sides of the pin insertion hole, the portion forming the pin insertion hole 32 does not become thin, so that the life of the slide core 30 can be extended. Further, since the storage portions 33 are independent of each other, it is of course possible to adjust the left and right lubrication states of the slide core 30 separately, and it is possible to easily perform the fine position adjustment of the slide core 30 itself. You can

Further, on the bottom surface of the slide core 30, if a groove communicating with each of the through holes 36 opened therein is formed, the lubricant in each port can be provided at the bottom of the slide core 30. Since it can be discharged over substantially the entire surface, the slide core 30 can be lubricated at the bottom more favorably.

Unlike the slide core 30 described above, the slide core used in the injection molding apparatus 100 does not have the storage portion 33 for the lubricant and the guide flow path 37. The guide rail 60 according to claim 2 as shown in FIG. 3 may be adopted.

As shown in FIG. 3, the guide rail 60 has a storage portion 61 for filling the guide rail 60 with a lubricant such as grease, and at least one of the guide rails 60. A guide channel 62 for the lubricant is formed on one of the sliding contact surfaces, and a through hole 63 for communicating the guide channel 62 and the storage section 61 is provided, and the guide rail 60 is provided with both metal parts. The opening is formed on the surface that does not come into contact with the molds 10 and 20 and the slide core, and a filling port 61a that communicates with the storage portion 61 is formed, and a hose 50 for feeding a lubricant or air is connected to the filling port 61a. The connection tool 51 is provided. That is, the storage portion 61 corresponds to the storage portion 33 on the slide core 30 side, and the guide flow passage 61 corresponds to the guide flow passage 37 on the slide core 30 side. Of course, the storage portion 61 and the guide flow passage 61 are communicated with each other by a through hole 63 corresponding to the through hole 36 on the slide core 30 side. The connection tool 51 adopted in the slide core 30 is connected to the filling port 61a of the storage section 61 of the guide rail 60, and the hose 50 is connected to the connection tool 51. is there.

[0039]

[Effect of device]

 As described above, first, in the device according to claim 1, "the injection molding apparatus 100 in which the other mold 20 is relatively moved with respect to the one mold 10 including the angular pin 11". In the slide core 30 which is used in the above, and is retracted from the injection-molded product 100 by the angular pin 11, an accommodating portion 33 that is filled with a lubricant such as grease is formed in the slide core 30, and A guide flow path 37 for the lubricant is formed on at least one sliding contact surface, and a through hole 36 for communicating the guide flow path 37 and the storage portion 33 is provided, and the slide core 30 has both of them. A filling port 33a that opens on the surface that does not come into contact with the molds 10 and 20 and that communicates with the storage portion 33 is formed, and a lubricant or air is sent into this filling port 33a. The connection tool 51 for connecting the hose 50 is provided ", which is a characteristic feature of the structure, which enables good lubrication between the slide core 30 and the mold supporting the slide core 30 in the injection molding apparatus. The slide core 30 can be provided with a simple structure.

That is, according to the slide core 30, since the lubrication state of the other die 20 can be constantly leached to the sliding contact surface of the slide core 30 to perform the lubrication, the slide core 30 itself can be maintained. In addition to being easy, the slide core 30 can be maintenance-free for a long period of time. Therefore, it is possible to efficiently manufacture the molded product 40 by the injection molding apparatus 100 of this kind as compared with the conventional apparatus.

In particular, if the filling port 33a is formed on the surface of the slide core 30 that does not come into contact with the molds 10 and 20, and the connecting tool 51 for connecting the hose 50 is attached to the filling port 33a, Through the hose 50, the lubricant, air, or cooling water can be freely supplied into the storage section 33, and the supply operation can be performed regardless of the state of the injection molding apparatus 100. Therefore, the slide core 30 having a high lubricity effect can be obtained.

Also, in the invention according to claim 2, the “mold is used in the injection molding apparatus 100 in which the other mold 20 is relatively moved with respect to the one mold 10 including the angular pin 11. In the guide rail 60 that guides the slide core that is engaged with the angular pin 11 and retracted from the injection-molded product 40, the guide rail 60 is provided with a storage portion 61 that is filled with a lubricant such as grease. In addition, a guide flow path 62 for the lubricant is formed on at least one sliding contact surface of the guide rail 60, and a through hole 63 that connects the guide flow path 62 and the storage section 61 is provided, and The guide rail 60 is provided with a filling port 61 a which is open at a surface which does not contact the molds 10 and 20 and the slide core and which communicates with the storage part 61. The connection tool 51 for connecting the hose 50 for feeding the lubricant or the air is provided to the filling port 61a ". This is a characteristic feature of the configuration, which allows the slide core in the injection molding apparatus to be guided well. It is possible to provide the guide rail 60 capable of performing proper lubrication with a simple structure.

[Brief description of drawings]

1 is a cross-sectional view of an injection molding apparatus using a slide core according to the present invention.

FIG. 2 is a cross-sectional view of the injection molding apparatus showing a state where one mold and the other mold are opened.

FIG. 3 is a perspective view of a slide core and a guide rail according to the present invention.

FIG. 4 is a front view of a slide core according to the present invention.

5 is a cross-sectional view (a) taken along line 1-1 of FIG. 4, and (b) is an enlarged partial cross-sectional view of a main part thereof.

FIG. 6 is a plan view of a slide core.

FIG. 7 is a bottom view of the slide core.

[Explanation of symbols]

 100 Injection Molding Device 10 One Mold 11 Angular Pin 20 The Other Mold 21 Guide Pin 22 Ejector Pin 30 Slide Core 31 Guide 32 Pin Insertion Hole 33 Storage Part 34 Screw Part 35 Plug 36 Through Hole 37 Guide Channel 38 Guide Surface 39 Undercut forming part 40 Molded product 41 Undercut part 50 Hose 51 Connecting tool 60 Guide rail 61 Storage part 61a Filling port 62 Guide channel 63 Through hole

Claims (2)

[Scope of utility model registration request] 1. A slide core used in an injection molding apparatus in which one mold having an angular pin is moved relative to the other mold, and a slide core retracted from an injection molded product by the angular pin. The slide core is provided with a storage portion filled with a lubricant such as grease, and a guide passage for the lubricant is formed on at least one sliding contact surface of the slide core. A through hole is provided for communicating between the container and the storage section, and the slide core is provided with a filling port that opens at a surface that does not contact the molds and that communicates with the storage section. A slide core provided with a connector for connecting a hose for feeding the lubricant or air to the mouth. 2. A slide core used in an injection molding apparatus in which one mold having an angular pin is moved relative to the other mold, and the slide core retracted from the injection molded product by the angular pin. In the guide rail to be guided, an accommodating portion for filling a lubricant such as grease is formed in the guide rail, and a guide passage for the lubricant is formed on at least one sliding contact surface of the guide rail. A filling hole is provided which connects the guide flow passage and the storage portion, and which is opened in the guide rail at a surface that does not contact the molds and the slide core and communicates with the storage portion. A guide rail, characterized in that a port is formed and a connecting tool for connecting a hose for feeding the lubricant or air is provided at the filling port.