JP3051844U - Mold switch - Google Patents

Abstract

(57) [Summary] [Purpose] Even large and heavy dies open smoothly,
And be able to close. A rack rod having a length extending from one end to the other end of an open mold portion and having a rack formed along the longitudinal direction, and a book attachable to one mold portion. The member 23 includes a member 23 and a sub-member 24 attachable to the other mold part 12. The member 23 can move along the rack rod 22, and can mesh with the rack 21 at the movement port portion. Operating means 2 for rotating the gear 28 directly or indirectly.
The forward / reverse operation of 3 changes the distance between the main member 23 and the sub member 24 so that the two mold portions 11 and 12 can be opened and closed.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to a mold switch which is disposed on both sides of a plurality of mold parts constituting a mold apparatus and comprises a pair of opening and closing devices for opening and closing the plurality of mold parts.

[0002]

[Prior art]

 In a mold apparatus used for synthetic resin molding, it is often necessary to open the mold by removing it from the molding machine for repair or inspection. Although the above operations can be performed manually for small and light-weight molds, large-sized and heavy-weight molds require a lot of work just to open and close the molds.

[0003] In a mold that cannot be manually operated, conventionally, a protrusion or the like is provided on a side portion, a hook bolt is attached to the protrusion, a sling is suspended by a crane through a wire rope, and the lifted mold is hit with a hammer or the like, and a shock is applied. For example, a method of adding a drop and opening it has been adopted. It is dangerous to provide used tires and other appropriate catches at the drop point of the mold part, and there is a possibility of damaging the mold pieces.

When closing a mold, it is not easy to close and close a large-sized one on a surface plate, so that one mold part lifted by the above method is placed on the other mold part placed below. A method of closing them by overlapping them has been adopted. However, it is necessary to proceed with caution while checking the positions of the guide pins, angular pins, etc. at the time of the above-mentioned closing, and the workability is not good. There is a risk of crushing.

[0005]

[Problems to be solved by the invention]

 The present invention has been made in view of the above points, and a problem thereof is to enable a large and heavy mold apparatus to smoothly open and close a mold. Another object of the present invention is to improve "crushing of pieces".

[0006]

[Means for Solving the Problems]

 In order to solve the above-mentioned problem, each of a pair of opening and closing devices constituting a mold switch has a length extending from one end to the other end of both mold portions in an open state, and is formed along a longitudinal direction. A rack rod having an inclined rack, a main member attachable to one mold portion, and a sub-member fixed to the rack rod attachable to the other mold portion. It has a moving port for enabling movement along the rack rod, and a drive gear positioned at the moving port portion and capable of meshing with the rack, and an operating means for directly or indirectly rotating the gear. The distance between the main member and the sub-member is changed by the forward / reverse operation so that both mold portions can be opened and closed.

[0007]

[Embodiment of the invention]

 The mold switch according to the present invention includes a pair of opening and closing devices 20 arranged on both sides of the mold portions 11 and 12 of the mold device 10 to open and close the mold portions 11 and 12.

The opening / closing device 20 includes a rack rod 22 having a length extending from one end 13 to the other end 14 of both mold portions in an open state and having a rack 21 formed along the longitudinal direction. I have. The length of the open state refers to the length from the one end 13 to the other end 14 after the apparatus 20 has been opened. This length is minimal and can have longer dimensions. See FIG.

The opening / closing device 20 is fixed to the rack bar 22 so as to be fittable to the main member 23 which can be fitted to the mounting plate 15 of the one mold portion 11 and to the mounting plate 16 of the other mold portion 12. Sub-member 24 is provided. The main member 23 and the sub member 24 have fitting portions 25 and 26, such as concave grooves, so that they can be fitted to the mounting boards 15 and 16 of the mold portions 11 and 12, respectively. The fitting portions 25 and 26 are means for transmitting the opening / closing force generated by the device 20 to the mold portions 11 and 12. The method of fixing the sub member 24 and the rack rod 22 is arbitrary. In the illustrated example, the sub-member 24 is fixed to the rack rod 22 by a set screw 34.

The present member 23 has a moving port 27 for allowing movement along the rack rod 22 and a driving gear 28 located at the moving port portion and capable of meshing with the rack 21. The moving port 27 extends in the longitudinal direction of the rack rod 22, and the main member side fitting portion 25 takes a positional relationship orthogonally crossing the extending direction of the rack rod 22. The drive gear 28 can mesh with the rack 21, and in order to maintain this meshing, the rack rod 22 slides on a pressure receiving surface 29 using the inner surface of the moving port 27 or the like.

An input shaft 31 can be provided on the cog wheel 30 in combination with a small gear 30 in order to reduce the rotational torque of the drive gear 28. An operating means 33 having a ratchet gear 32 is connected to the input shaft 31. Therefore, the drive gear 28 is indirectly rotated via a small gear or the like.

In order to open and close the mold device 10 with such an opening and closing device 20, the fitting portion 25 of the main member 23 is fitted into the mounting plate 15 of one mold portion 11, and the other mold portion 12 is The fitting portion 26 of the sub member 24 is fitted into the mounting board 16. For this operation, it is natural that the distance between the both-end mounting plates 15 and 16 and the distance between the fitting portions 25 and 26 are matched. The main member 23 and the sub member 24 are tightened with fastening screws 35 and 36 to stop the main opening and closing devices 20 and 20 with respect to the mold apparatus 10. The above operation is performed for the pair of opening / closing devices 20.

Next, the operating means 33 is connected to the input shaft 31 and rotated in either forward or reverse direction. In the illustrated example, a manual ratchet handle is used for the operation means 33, and the ratchet direction can be reversed by switching the pawl 37. Therefore, for example, by rotating the drive gear 28 in the forward direction, the mold portions 11 and 12 placed on the surface plate 38 can be released, that is, the mold can be opened, while the reverse of the gear 28 can be performed. By turning in the direction, the open mold parts 11, 12 can be closed.

[0014]

[Effect of the invention]

 Since the present invention is constructed and operates as described above, the present invention has an effect that even a large and heavy mold apparatus can open and close the mold smoothly by human power. In addition, according to the present invention, the mold can be opened and closed smoothly by manual power on the surface plate, so that there is no risk of crushing the pieces and the mold life can be improved.

[Brief description of the drawings]

FIG. 1 is a perspective view showing one embodiment of a mold switch according to the present invention.

FIG. 2 is a front view showing the opening and closing device together with a part of the mold apparatus.

FIG. 3 is a plan view of the same.

FIG. 4 is a side view in which an intermediate portion is omitted.

Claims (3)

[Utility model registration claims] 1. A mold switch which is disposed on both sides of a plurality of mold parts constituting a mold apparatus and comprises a pair of open / close devices for opening / closing the plurality of mold parts. A rack rod having a length extending from one end to the other end of the two mold parts in the state and having a rack formed along the longitudinal direction, a main member attachable to one mold part, and the other metal part It has a sub-member fixed to the rack rod so that it can be attached to the mold part, and this member can move along the rack rod, and can be engaged with the rack at the moving port part And a direct drive gear to rotate the gear directly or indirectly.
A mold switch wherein the distance between the main member and the sub-member is changed so that both mold portions can be opened and closed. 2. An input shaft is provided on a combination of a small gear to reduce the rotational torque of the drive gear.
The described mold switch. 3. The mold switch according to claim 1, further comprising a structure in which the main member and the sub member are tightened with a fastening screw to stop the opening and closing device with respect to the mold device.