JPH07119012B2 - Injection molding machine - Google Patents

Description

Description: TECHNICAL FIELD The present invention mainly relates to a thermoplastic resin injection molding machine, and particularly, to efficiently form a molded product by using two sets of molds of different types or the same type. The present invention relates to an injection molding machine suitable for production.

(Prior Art) In this type of injection molding, a cooling time of several seconds to several tens of seconds is required until the molded product is taken out after injecting the thermoplastic resin into the mold, so that conventionally, one injection unit is used. A method to improve mass productivity by using two sets of dies for the equipment was proposed,
Some have been put to practical use. In this method, while the resin injected and filled in one mold is cooled, the resin is injected into the other mold, and the injection process and cooling (and removal of the molded product)
By parallelizing the process, a large number of molded products can be molded within a fixed time.

For example, the injection molding machine disclosed in Japanese Utility Model Laid-Open No. 58-17119 also produces a molded product by the above method.

The injection molding machine is provided with a take-out section for cooling and solidifying the resin molded product and taking it out on both sides of the injection section for injecting the resin into the clamped mold, and two sets of the injection section and the take-out section are provided. The method of transporting alternately is adopted. The injection unit is provided with an injection device and a mold clamping unit using a mold clamping cylinder, and the extraction unit includes a mold opening adjustment unit using a cylinder and a molded product extraction unit using an eject cylinder. Equipped with. Then, as a mold opening / closing / conveying means, one movable plate facing each other through a plurality of mold opening / closing cylinders is provided with two movable mold mounting boards on the left and right, and a horizontal moving mechanism for the movable plate. ing.

In the above-mentioned mold opening / closing / conveying means, in the two sets of molds, each fixed mold is attached to the moving plate, each movable mold is attached to each movable mold take-out board, and the mold opening / closing cylinder is expanded / contracted. By doing so, each mold assembly is opened and closed. Also,
The moving plate moves with the two sets of molds closed (combined), and the two sets of molds are simultaneously conveyed to the left or right together with the mold opening / closing cylinder and the movable mold mounting plate. In this way, two sets of molds are alternately conveyed to the injection section, and the other is located in either the left or right take-out section, so that injection and cooling (and take-out) are performed at these two points at the same time. It

Since the injection section of the above-mentioned injection molding machine is not provided with means for taking out a molded product from the mold, the mold injection-filled with the resin at the injection section is conveyed to the take-out section. Only the molded product can be taken out. Further, as described above, the two sets of molds are interlocked and conveyed at one time. Therefore, when one set of molds is conveyed to the take-out section, the other set of molds is conveyed to the ejection section, and the ejection device is ejected. This time, resin is injected into this mold. Therefore, in the case of producing a large number of N shaped articles of a certain shape, two sets of dies of the same shape are prepared, and N / 2 pieces are received by each set of dies to be formed.

(Problems to be Solved by the Invention) In the injection molding machine of the type in which two sets of molds are alternately moved to the injection section and the take-out section, the structure of the means for conveying the molds is conventionally complicated as described above. Met. In other words, the means for conveying the die has a mechanism for opening and closing the die, and it is necessary to convey this opening / closing mechanism together with the die to the injection section and the left and right take-out sections. This is because a spring for separating the gate part (runner of resin) is attached to the parting surface (matching surface) of the fixed mold and the movable mold of each set of the mold, and in a natural state, This is because the reaction force of the spring opens it during transportation. Also in the publicly known example described in the above-mentioned publication, a plurality of mold opening / closing cylinders are provided in the mold opening / closing / conveying means, so that the molds can be conveyed right and left while being kept in a combined state. ing.

The mold opening / closing mechanism includes a plate for mounting a fixed mold, a movable plate for mounting a movable mold, a guide rod for the movable plate, a cylinder for opening and closing the mold by moving the movable plate back and forth, and piping for the cylinder (flexible tube). ) And the like are required, the means for transporting the molds to the left and right along with these is inevitably a very complicated structure. For this reason, the cost of the injection molding machine is high, and there is a possibility that failures frequently occur.

On the other hand, as described above, the conventional injection molding machine, which does not have a molded product take-out part in the injection part, is efficient in the case of producing a large amount of molded products of the same shape, , It is not effective when producing a certain number that is not so large. That is, in principle, two sets of dies must be manufactured and used, so that the manufacturing cost may be high rather than high-volume small-quantity production. It is possible to use only one set of molds, but at that time, one of the take-out parts becomes idle and the mass production capacity of the injection molding machine cannot be utilized. Moreover, even when one of the take-out parts is in a rest state, the mold opening / closing / conveying means also reciprocates as the mold to be used is conveyed between the ejecting part and the take-out part. Since it also goes in and out of the take-out part during suspension, for example, the work of attaching another set of molds to the opening / closing / conveying means (so-called setup change) is carried out until the injection molding of all the molded products is completed by one set of molds. Can not. Further, for this reason, even when two or more types of molded products having the same resin material are injection-molded, if the numbers of these products are different, the mass production effect can hardly be obtained.

(Object of the Invention) The present invention has been made in order to solve the above problems, and an opening / closing mechanism of a mold can be provided separately from the mold conveying means. Therefore, the structure of the mold conveying means is The objective is to provide an injection molding machine that is simple, has a low equipment cost, and has few failures.

Furthermore, if only one set of molds is used for injection molding, the molded product can be taken out at the injection section, and therefore, the set-up of the molds of other sets can be carried out at the molded product take-out section during suspension. , It is intended to provide an injection molding machine capable of efficiently producing a wide variety of molded products.

(Means for Solving the Problems) In order to achieve the above object, in the injection molding machine according to claim 1 of the present invention, molding is performed on both sides of an injection part having a resin injection device into a mold. After cooling the product, the mold is opened, the molded product is taken out, the molded product taking-out part for combining the molds again is provided, and two sets of molds are provided between the injection part and the molded product taking-out part by the mold conveying means. In an injection molding machine which alternately conveys and molds a molded product, the mold conveying means includes a mold conveying means in front of the injection device, which extends over one of the molded product takeout parts and the injection part. A movable plate for holding the fixed mold is arranged, and the fixed mold or its holder and the movable mold or its holder of each set of molds are coupled to each other through a lock member which can be engaged and disengaged. It is configured to do.

Further, in addition to the above, in the injection molding machine of claim 2, the injection section is also provided with a molded product take-out means for opening the mold after cooling the molded product to take out the molded product and to combine the molds again. .

(Operation) According to the injection molding machine of claim 1, in the two sets of molds, each fixed mold is held by the plate of the mold conveying means, and each movable mold is fixed via the lock member. Combined with the mold,
It is conveyed to the injection part and the molded product take-out part. Since the locking member does not separate in the natural state due to its tightening force, the mold does not open during transportation even if the movable mold is not held using a movable platen or a cylinder. Each mold is opened by pulling the movable mold with respect to the fixed mold with a force exceeding the tightening force of the lock member at the molding take-out portion.

Further, according to the injection molding machine of claim 2, when injection molding is performed using one set of molds, the resin is injected into the molds and then the molded product is taken out at the injection part. There is no need to move the plate of the mold carrier to the left or right.
Therefore, it is possible to perform setup change work such as mounting another mold to the mold conveying means at one molded product take-out part which is in a pause while performing injection and taking out a molded product at the injection part. Is.

(Embodiment) FIG. 1 is a plan view showing an embodiment of an injection molding machine of the present invention,
2 and 3 are respectively II-II line and III of FIG.
FIG. 3 is a side sectional view taken along the line III.

As shown in FIG. 1, the injection molding machine 1 has a right and left sides (up and down directions in the figure.
"Left" refers to the upper side and the lower side of FIG. 1, respectively.) Formed product take-out parts 200 and 300 are provided at equal distances D on both sides, and two sets of molds A and B are provided at these three places. Injection molding is carried out while alternately carrying by the mold carrying means 400. Since the mold transfer means 400 holds the two sets of molds A and B on the plate 401 at intervals of the distance D and transfers them to the left and right, as shown in the figure, the mold B is ejected from the injection section 100.
When the mold A is carried into the injection section 100, the mold A is located in the take-out section 200. Conversely, when the mold A is carried into the injection section 100, the mold B is taken out from the take-out section 3.
Located at 00.

The injection part 100 includes a mold clamping cylinder 110, an injection device 120, and the like, and is a part for injecting resin into a clamped mold (A or B; the same applies hereinafter unless otherwise specified). Injection device 120
Is a hopper 121 that supplies a resin material, a barrel 122 that incorporates an injection screw, an injection nozzle 123, a screw drive motor (not shown), and a front-back direction of the injection device 120 (hereinafter, “front” and “rear” refer to each other. The right and left sides of FIG. 2) are included as moving means (not shown). The mold clamping cylinder 110 is
A flat plate 10 for fixing the whole of the injection molding machine 1 and four tie rods 1 suspended from a fixed plate 101 fixed to the flat plate 10.
It is fixed to the tip of 02 via a fixing plate 109. Hollow rod 1 connected to telescopic rod 110a of this cylinder 110
The movable platen 103 is fixed to the tip of 10b.
A mold is sandwiched between 1 and 1, and the mold is clamped by the hydraulic pressure of the cylinder 110 to prevent the injected resin from leaking. Since the movable plate 103 has the tie rods 102 inserted through sliding bushes 103a having self-lubricating properties provided at its four corners, the movable plate 103 is guided by the tie rods 102 and moves back and forth. The injection unit 100 is also provided with a molded product takeout means, which will be described later.

The molded product take-out section 200 is a place where after the resin injected into the mold A is cooled and solidified, the mold A is opened to take out this molded product, and the mold A is closed (combined) again. The mold opening / closing cylinder 210 has an eject cylinder 211 and the like.

The mold opening / closing cylinder 210 is fixed to the tip portions of the four tie rods 201 hung vertically with respect to the flat plate 10 via a fixed plate 209, and is fixed to the fixed plate 201 fixed to the flat plate 10. The mold A is opened and closed by moving the movable platen 203 back and forth by the telescopic rod 210a. The movable platen 203 is, like the front and rear movable plate 103, a sliding bush having self-lubricating properties provided at its four corners.
The front and rear tie rods 202 are inserted through 203a, and are guided by this to move back and forth. The mold A (the same applies to the mold B. The mold will be described later) moves the movable mold A2 with respect to the fixed mold A1 back and forth together with its holders A21, A23, A24 and the holder substrate A29 to open and close. As a result, the rod 210a of the cylinder 210 extends to move the movable platen 203 to the fixed plate 201.
The mold A can be closed (combined) by pressing it to the side. At the upper and lower ends of the mold mounting surface of the movable plate 203, there are provided long protrusions 208 and 206 for engaging the side ends of the mold holder substrate A29 to open the mold, as shown in FIG. In addition, through the blocks 207 and 204, respectively, the movable plate 203
Are attached at slightly spaced positions with the protruding edges facing inward. Therefore, when the mold A is opened, when the rod 210a of the cylinder 210 is pulled in and the movable platen 203 is moved forward, the upper and lower sides (hereinafter, "upper" and "lower" refer to the upper and lower sides in FIGS. 2 and 3). The projecting pieces 208 and 206 engage with the upper and lower end portions of the mold holder substrate A29 and pull them forward, so that the mold A can be opened. The mold opening / closing cylinder 210 is provided with a sufficient expansion / contraction stroke so that various molds can be opened / closed. However, in order to limit the stroke and adjust the mold opening according to the mold, the expansion / contraction rod is used. twenty one
A pad plate 214 is attached to the tip side of 0a, and a replaceable spacer 213 having an appropriate thickness is fixed to a fixed plate 209 so as to abut against this.

Further, the molded product take-out section 200 has a mold opening / closing cylinder 210
A pressure release cylinder 212 and an eject cylinder 211 are provided in connection with the rod 210a. One end of the cylinder body of the eject cylinder 211 is fixedly mounted on the movable platen 203, and the telescopic rod 211a thereof is configured to expand and contract within the central opening of the movable platen 203. An ejector pin A25 for ejecting a molded product is slidably arranged in the movable mold A2, and one end of the push plate A26 installed normally projects forward (see FIG. 1), but as described above. After opening the mold A by the action of the mold opening / closing cylinder 210 and the movable plate 203,
When the rod 211a of the eject cylinder 211 is extended, the tip of the rod 211a pushes out the push-out rod A27 supported by the holder substrate A29 via the sliding member A28, and this pushes the push plate A26.
Since the pin A25 and the pin A25 are pushed out, the molded product is taken out of the mold A2. The body of the pressure relief cylinder 212 is fixed to the eject cylinder 211 side, and the rod 210a
The rod 212a is connected to the movable plate 203, and the movable platen 203 can be moved back and forth by a short stroke without operating the mold opening / closing cylinder 210. That is, the mold opening / closing cylinder 21
With rod 210a of 0 extended and mold A closed, rod 2
By pulling in 12a, the pressing pressure of the movable platen 203 against the mold A is released, and the movable platen 203 is moved to the mold holder substrate A29.
Away from the front of. However, since the moving amount of the movable platen 203 is small, the protrusions 206 and 208 do not engage with the substrate A29 at this time.

The molded product take-out section 300 has a similar structure. Therefore, in FIG. 1, each component of the take-out unit 300 is assigned the same two-digit numeral and alphabetic character as the take-out unit 200 except that the hundredth digit is set to 3. Further, in the figure, it is assumed that not the mold A but the mold B made up of each component having the initial letter B goes in and out of the take-out section 300.

The mold conveying means 400 conveys two sets of molds A and B to the injection part 100 and the molded product takeout parts 200 and 300 on the left and right thereof. As described above, the plate 401 holding the two sets of molds A and B is supported by the two rails 403 extending left and right on the front surface of the flat plate 10 through the four sets of sliding support members 410. In front of the injection device 120,
The fixed plates 101, 201, 301 are arranged so as to be movable left and right along the front surface thereof. A bracket 402 fixed to the plate 410 as a drive source for moving the plate 401.
A rodless cylinder 420 that slides right and left inside the opening 10a of the flat plate 10 is attached to the rear of the flat plate 10. In the sliding support member 410, the linear motion bearing portion 411 having a U-shaped cross section grips the rail 403, and the shaft 412 in front of it grips and supports the plate 401, but between the bearing portion 411 and the plate 401. A coil spring 413 is compressed and disposed, and a sliding bush 414 and an elastic spacer 415 are interposed between the plate 401 and the front end stop nut 416 of the shaft 412. Therefore, the movable plates 103, 203, 303 are actuated by the action of the mold clamping cylinder 110 and the pressure release cylinders 212, 312.
When the pressing pressure of is released, the plate 401 is pushed by the coil spring 413 and is separated from the fixed plates 101, 201, 301.
By operating the rodless cylinder 420, the plate 401 and the molds A and B held by the plate 401 can be smoothly moved to the left and right. Incidentally, in order to enable the injection of the resin into the mold in the injection part 100, the front part of the injection device 120 can be inserted into the center parts of the flat plate 10 and the fixed plate 101 and the mold attachment part of the plate 401. An opening is formed. Also, the stop position when moving the plate 401, one of the mold is accurately located in the center of the injection unit 100,
It is controlled by using a position detection sensor provided on the flat plate 10 or the like.

The mold A is a combination of a fixed mold A1 held by the mold holder A11 and the holder substrate A13 and a movable mold A2 held by the mold holders A21, A23, A24 and the holder substrate A29. Become a pair. Although not shown, fixed mold A1,
Each of the movable molds A2 is provided with a cooling liquid pipe for adjusting the cooling degree of the injected resin, and is connected to an external cooling liquid supply source by a flexible pipe. Also, as a meter attached to the mold A, equipped with a counter that counts the number of times each time the resin is injected (the number of molded products), and a timer (not shown) that measures the cooling time after the resin is injected. Has been done. The fixed mold A1 is held by fixing the substrate A13 to the plate 401 with bolts or the like, while the movable mold A2 is fixed to the fixed mold A1 by combining the holder A21 with the holder A11 as follows. It is designed to be held in combination. Ie holder
In front of the block A12 that extends to the left and right sides of the A11, a fitting projection piece A12a having a U-shaped spring piece Ae attached to the side surface is formed as a locking member that can be engaged and disengaged, and a holder A2.
In the block A22 overhanging on both the left and right sides of 1, a fitting hole A22a having a recess into which the spring piece Ae is fitted is formed on the inner surface,
When both are fitted, the holder A21 is joined to the holder A11 by the elastic tightening force of the spring piece Ae. In this embodiment, the tightening force of the spring piece Ae is set to about 200 kg, and the reaction force of the gate separating spring and the movable mold A2 are set.
(Holders A21, A23, A24, Block A22, Holder board
Since the weight of the mold A is sufficiently large compared to the total weight of the mold A (including A29 and pins A25, etc.), the protruding piece A12a does not separate from the fitting hole A22a and open. At the time of movement, the lower surface of the mold holder A23 is attached to the block 104 of the movable plate 103, the transfer roller 105 (see FIG. 3), or the movable plate 2
The roller 205 attached to the block 204 of 03 (see FIG. 2)
Since it is installed on the upper side, the mold A can be smoothly transported left and right. Further, in order to separate the movable mold A2 from the fixed mold A1, the tightening force (about 20
The movable mold A2 should be pulled with a force exceeding 0 kg).

Although the description of the mold B is omitted, only the injection space (cavity) inside the fixed mold B1 and the movable mold B2 differs depending on the shape of the molded product, and the external shape and the holder, instrument, etc. The components are the same as the mold A. In the figure, each part has a corresponding mold A except that the initials are B.
The same reference numerals are given to each part of FIG. Further, as described above, the mold B is conveyed between the injection part 100 and the molded product takeout part 300.

In the injection device 1, the injection part 100 is also provided with a molded product takeout means as follows. That is, similar to the take-out portions 200 and 300, the long protrusions 108 and 106 are provided at the upper and lower end portions of the mold mounting surface of the movable plate 103,
Attached via bricks 107 and 104, respectively (see Fig. 3)
To open the mold and the hollow rod 11
It is installed inside 0b and the eject cylinder 111 is installed on the front of the movable platen 103.
Was fixed, and the rod 111a was expanded and contracted in the central opening of the movable plate 103 to take out the molded product. Therefore,
After the mold is opened by the action of the mold clamping cylinder 110 and the movable plate 103, the molded product can be taken out by extending the rod 111a of the eject cylinder 111. Further, the mold clamping cylinder 110 has a sufficient stroke for opening the mold, and a stroke setting / control means (not shown) and a displacement amount detection means (not shown) for the movable platen 103 such as a potentiometer. In order to release the pressing force to the mold, the rod 110a can be pulled in for a short stroke, and the movable platen 103 can be moved slightly and stopped.

Next, an operation mode of the injection molding machine 1 configured as described above will be described.

The movement of each mold when two types of molded products are obtained by using two sets of different molds A and B will be roughly described as follows. For example, when the combined mold A is carried into the injection part 100, it is clamped by the mold clamping cylinder 110 and the resin is injected by the injection device 120, and the mold clamping pressure is applied until the resin pressure in the mold A becomes zero. After being held (pressure-holding), it is conveyed to the molded product take-out section 200. At this time, the mold B that had been in the take-out section 300 until then is carried into the injection section 100, and then the resin is injected in the same manner as described above. On the other hand, in the mold A conveyed to the take-out section 200, after cooling the molded product, the movable mold A2 is separated from the fixed mold A1 and opened by the mold opening / closing cylinder 210, and the eject cylinder 211 is opened.
By the action of, the molded product inside is taken out, the movable mold A2 is again combined with the fixed mold A1, and the injection part 10 is pressed as described above.
Transported to 0. At the same time, the mold B is conveyed from the injection section 100 to the take-out section 300, where the molded articles are taken out and reassembled as described above. The above process is repeated to alternately produce two types of molded products. The injection device 120 injects an appropriate amount of resin into the two sets of molds A and B at an optimum pressure and speed corresponding to each molded product, but the resin is injected into one mold (for example, A). Immediately after the injection, the resin injected into the other mold (same as B) is weighed and sucked back.
When the molds A and B are conveyed to the left and right by the mold conveying means 400, the movable plates 203, 303 or 103 are moved by the pressure relief cylinders 212 and 312 or the mold clamping cylinder 110 prior to this.
To slightly forward, release the pressing pressure of each mold (release pressure), and fix the plate 401 to the fixing plates 101, 20 as described above.
Must be separated from 1, 301.

Next, a flow chart of the operation mode of the injection molding machine 1 having the above-mentioned configuration is shown in FIGS. Of these, FIG. 7A shows an operating mode in the case of using two sets of molds A and B as described above. The starting process P is a process of starting the injection molding by first instructing which mold A or B is in the injection unit 100, and the injection device 120 measures the resin injected into the mold A or B.・ Suck back and prepare.

After that, in the injection unit 100, the mold is first tightened, and then the nozzle 123 of the injection device 120 is pressed against the injection hole of the mold (injection preparation process Q), and the mold A or the mold A or the mold is used according to the injection mold. The resin is injected into the mold B, the counter and the cooling timer are activated, and the resin for the other mold is measured and sucked back (A injection process Ra or B injection process Rb). On the other hand, in the meantime, in the molded product taking-out section 200 or 300, according to the injection mold (So), after the cooling timer ticks a predetermined time, the mold is opened and the molded product is taken out,
Further, the molds are closed (combined) (B cooling /
Extraction process Sb or A cooling and extraction process Sa). When the above process is completed (T), the injection device 120 is retracted to perform “depressurization” of the injection part 100 and the molded product takeout parts 200, 300, and then the mold A, by the mold conveying means 400,
B is conveyed (die conveyance process U).

If the number of injections (the number of molded products) of the molds A and B counted by the counter does not reach the predetermined number (V), the above process Q, Ro, Ra, Rb, So, Sa, Sb, T, U , V are repeated to produce two types of molded products. In this figure, "eject" refers to taking out a molded product from a mold, and "pressurizing" means rods 212a and 312a of the pressure releasing cylinders 212 and 312.
Extend and press the mold with the movable plates 203 and 303,
The “pressure release” means that the rods 212a and 312a are pulled in to perform the “pressure release”.

FIG. 4 (b) shows that when the number of injections of one of the molds A and B reaches a predetermined number (counting is completed), only the molds on the uncounted side are used following the above steps U and V. , Injection part 100
6 is a flowchart showing that injection, cooling, and removal of a molded product are performed by.

That is, the injection unit 100 in which the mold on the uncounted side has been loaded.
Then, as in the process Q, the mold is clamped and the nozzle 123 is pressed against this (injection preparation process Q '), and the resin is injected into the mold as in the process Ra or Rb and the next injection resin is injected. Weigh and suck back (injection process R ′ on uncounted side). When the above process is completed (T '),
After the cooling time of the molded product has passed, the mold is opened by the mold clamping cylinder 110, and the molded product is taken out by the eject cylinder 111 (cooling / injection process W). These steps Q ', R', T ', W are repeated in the injection section 100 unless the number of molded articles by this mold has expired (X).

On the other hand, in the meantime, in the molded product taking-out section 200 or 300 in which the mold of which the count has already expired has been carried in, it is necessary after cooling and taking out of the molded product (cooling and taking-out process S ′ on the count-expiring side). Accordingly, another mold (not shown) is attached instead of the mold (mold changing process Y). When the process Y and the process W in the injection unit 100 are completed (Z), the process returns to the process Q and So in FIG. 4 (a) and restarts the injection molding using the two sets of molds. In addition,
While the injection unit 100 is performing injection molding using only one mold (processes Q ', R', T ', W), the other mold and the mold conveying means 400 do not move, so the mold is not moved. The exchange (process Y) is performed safely and easily, but if the injection part 100 is covered with a cover or the like at this time, the fingers will not be accidentally caught in the opened / closed mold and the work can be performed more safely. can do.

(Effect of the Invention) According to the injection molding machine of the present invention, since it is not necessary to convey a mold opening / closing mechanism that combines molds using a cylinder or the like to the injection unit and the molded product take-out unit together with the mold, Since the structure of the mold conveying means is simple, the equipment cost of the injection molding machine can be reduced, and the occurrence of malfunctions can be reduced.

Furthermore, according to the injection molding machine of claim 2, when injection molding is performed using only one set of molds, another set of molds can be attached or set up by the molded product take-out portion during rest, It is also possible to efficiently produce a wide variety of molded products. From this point of view, even if several kinds of molded products having different shapes and production numbers are used, the injection molding work can be performed in parallel if the resin materials are the same.

[Brief description of drawings]

Each of the drawings relates to an embodiment of the present invention. Fig. 1 is a plan view of a thermoplastic resin injection molding machine, Fig. 2 is a side sectional view taken along line II-II of Fig. 1, and Fig. 3 is the same. III-III
4 is a side sectional view taken along the line, and FIGS.
It is a flow chart which shows the operating mode of the injection molding machine shown in a figure. DESCRIPTION OF SYMBOLS 1 ... Injection molding machine, 100 ... Injection part, 103 ... Movable plate, 110 ... Mold clamping cylinder, 111 ... Eject cylinder, 120 ... Injection device, 200,300 ... Molded product take-out part, 203, 303 ... Movable plate, 21
0,310 ... Mold open / close cylinder, 211, 311 ... Eject cylinder, 212, 312 ... Depressurization cylinder, 400 ... Mold transfer means, 40
1 ... Plate, A, B ... Mold, A1, B1 ... Fixed mold, A2, B2 ... Movable mold, A12a, B12a ... Fitting protrusion, A22a, B22a ... Fitting hole, U
… Mold transfer process, W… Injection part cooling / removal process, Y…
Mold exchange process.

Claims (2)

[Claims] 1. A molded product take-out portion is provided on both sides of an injection part having a device for injecting a resin into the mold, and after the molded product is cooled, the mold is opened to take out the molded product and combine the mold again. In an injection molding machine for forming a molded product by alternately transferring two sets of molds between the injection section and the molded product take-out section by the mold transfer means, the mold transfer means includes the injection device. 2 in the front of the straddle over one of the molded product take-out parts and the injection part.
A movable plate for holding a fixed die of a set of dies is provided, and the fixed die or the holder thereof and the movable die or the holder of the die of each set can be engaged and disengaged with each other. An injection molding machine characterized in that it is configured to be coupled via members. 2. The injection molding machine according to claim 1, wherein the injection section is also provided with a molded product take-out means for opening the mold after cooling the molded product, taking out the molded product, and combining the molds again.